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Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT/emulated/treetable/org/eclipse/swt/widgets/Tree.java')
| -rw-r--r-- | bundles/org.eclipse.swt/Eclipse SWT/emulated/treetable/org/eclipse/swt/widgets/Tree.java | 4295 |
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diff --git a/bundles/org.eclipse.swt/Eclipse SWT/emulated/treetable/org/eclipse/swt/widgets/Tree.java b/bundles/org.eclipse.swt/Eclipse SWT/emulated/treetable/org/eclipse/swt/widgets/Tree.java new file mode 100644 index 0000000000..1e65f8c530 --- /dev/null +++ b/bundles/org.eclipse.swt/Eclipse SWT/emulated/treetable/org/eclipse/swt/widgets/Tree.java @@ -0,0 +1,4295 @@ +/******************************************************************************* + * Copyright (c) 2000, 2009 IBM Corporation and others. + * All rights reserved. This program and the accompanying materials + * are made available under the terms of the Eclipse Public License v1.0 + * which accompanies this distribution, and is available at + * http://www.eclipse.org/legal/epl-v10.html + * + * Contributors: + * IBM Corporation - initial API and implementation + *******************************************************************************/ +package org.eclipse.swt.widgets; + +import org.eclipse.swt.*; +import org.eclipse.swt.events.*; +import org.eclipse.swt.graphics.*; +import org.eclipse.swt.internal.*; + +/** + * Instances of this class provide a selectable user interface object + * that displays a hierarchy of items and issues notification when an + * item in the hierarchy is selected. + * <p> + * The item children that may be added to instances of this class + * must be of type <code>TreeItem</code>. + * </p><p> + * Style <code>VIRTUAL</code> is used to create a <code>Tree</code> whose + * <code>TreeItem</code>s are to be populated by the client on an on-demand basis + * instead of up-front. This can provide significant performance improvements for + * trees that are very large or for which <code>TreeItem</code> population is + * expensive (for example, retrieving values from an external source). + * </p><p> + * Here is an example of using a <code>Tree</code> with style <code>VIRTUAL</code>: + * <code><pre> + * final Tree tree = new Tree(parent, SWT.VIRTUAL | SWT.BORDER); + * tree.setItemCount(20); + * tree.addListener(SWT.SetData, new Listener() { + * public void handleEvent(Event event) { + * TreeItem item = (TreeItem)event.item; + * TreeItem parentItem = item.getParentItem(); + * String text = null; + * if (parentItem == null) { + * text = "node " + tree.indexOf(item); + * } else { + * text = parentItem.getText() + " - " + parentItem.indexOf(item); + * } + * item.setText(text); + * System.out.println(text); + * item.setItemCount(10); + * } + * }); + * </pre></code> + * </p><p> + * Note that although this class is a subclass of <code>Composite</code>, + * it does not normally make sense to add <code>Control</code> children to + * it, or set a layout on it, unless implementing something like a cell + * editor. + * </p><p> + * <dl> + * <dt><b>Styles:</b></dt> + * <dd>SINGLE, MULTI, CHECK, FULL_SELECTION, VIRTUAL, NO_SCROLL</dd> + * <dt><b>Events:</b></dt> + * <dd>Selection, DefaultSelection, Collapse, Expand, SetData, MeasureItem, EraseItem, PaintItem</dd> + * </dl> + * </p><p> + * Note: Only one of the styles SINGLE and MULTI may be specified. + * </p><p> + * IMPORTANT: This class is <em>not</em> intended to be subclassed. + * </p> + * + * @see <a href="http://www.eclipse.org/swt/snippets/#tree">Tree, TreeItem, TreeColumn snippets</a> + * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample</a> + * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> + * @noextend This class is not intended to be subclassed by clients. + */ +public class Tree extends Composite { + Canvas header; + TreeColumn[] columns = new TreeColumn [0]; + TreeColumn[] orderedColumns; + TreeItem[] items = NO_ITEMS; + TreeItem[] availableItems = NO_ITEMS; + TreeItem[] selectedItems = NO_ITEMS; + TreeItem focusItem, anchorItem, insertMarkItem; + TreeItem lastClickedItem; + Event lastSelectionEvent; + int availableItemsCount = 0; + boolean insertMarkPrecedes = false; + boolean linesVisible, ignoreKey, ignoreDispose, customHeightSet; + int topIndex = 0, horizontalOffset = 0; + int fontHeight = 0, imageHeight = 0, itemHeight = 0; + int headerImageHeight = 0, orderedCol0imageWidth = 0; + TreeColumn resizeColumn; + int resizeColumnX = -1; + int drawCount = 0; + boolean inExpand = false; /* for item creation within Expand callback */ + TreeColumn sortColumn; + int sortDirection = SWT.NONE; + + /* column header tooltip */ + Listener toolTipListener; + Shell toolTipShell; + Label toolTipLabel; + + Rectangle arrowBounds, expanderBounds, checkboxBounds, clientArea; + + static final TreeItem[] NO_ITEMS = new TreeItem [0]; + + static final int MARGIN_IMAGE = 3; + static final int MARGIN_CELL = 1; + static final int SIZE_HORIZONTALSCROLL = 5; + static final int TOLLERANCE_COLUMNRESIZE = 2; + static final int WIDTH_HEADER_SHADOW = 2; + static final int WIDTH_CELL_HIGHLIGHT = 1; + static final int [] toolTipEvents = new int[] {SWT.MouseExit, SWT.MouseHover, SWT.MouseMove, SWT.MouseDown}; + static final String ELLIPSIS = "..."; //$NON-NLS-1$ + static final String ID_EXPANDED = "EXPANDED"; //$NON-NLS-1$ + static final String ID_COLLAPSED = "COLLAPSED"; //$NON-NLS-1$ + static final String ID_UNCHECKED = "UNCHECKED"; //$NON-NLS-1$ + static final String ID_GRAYUNCHECKED = "GRAYUNCHECKED"; //$NON-NLS-1$ + static final String ID_CHECKMARK = "CHECKMARK"; //$NON-NLS-1$ + static final String ID_CONNECTOR_COLOR = "CONNECTOR_COLOR"; //$NON-NLS-1$ + static final String ID_ARROWUP = "ARROWUP"; //$NON-NLS-1$ + static final String ID_ARROWDOWN = "ARROWDOWN"; //$NON-NLS-1$ + +// TEMPORARY CODE +boolean hasFocus; + +public boolean isFocusControl() { + return hasFocus; +} + +/** + * Constructs a new instance of this class given its parent + * and a style value describing its behavior and appearance. + * <p> + * The style value is either one of the style constants defined in + * class <code>SWT</code> which is applicable to instances of this + * class, or must be built by <em>bitwise OR</em>'ing together + * (that is, using the <code>int</code> "|" operator) two or more + * of those <code>SWT</code> style constants. The class description + * lists the style constants that are applicable to the class. + * Style bits are also inherited from superclasses. + * </p> + * + * @param parent a composite control which will be the parent of the new instance (cannot be null) + * @param style the style of control to construct + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> + * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> + * </ul> + * + * @see SWT#SINGLE + * @see SWT#MULTI + * @see SWT#CHECK + * @see SWT#FULL_SELECTION + * @see SWT#VIRTUAL + * @see SWT#NO_SCROLL + * @see Widget#checkSubclass + * @see Widget#getStyle + */ +public Tree (Composite parent, int style) { + super (parent, checkStyle (style)); + setForeground (null); /* set foreground and background to chosen default colors */ + setBackground (null); + GC gc = new GC (this); + fontHeight = gc.getFontMetrics ().getHeight (); + gc.dispose (); + itemHeight = fontHeight + (2 * getCellPadding ()); + initImages (display); + expanderBounds = getExpandedImage ().getBounds (); + checkboxBounds = getUncheckedImage ().getBounds (); + arrowBounds = getArrowDownImage ().getBounds (); + clientArea = getClientArea (); + + Listener listener = new Listener () { + public void handleEvent (Event event) { + handleEvents (event); + } + }; + addListener (SWT.Paint, listener); + addListener (SWT.MouseDown, listener); + addListener (SWT.MouseUp, listener); + addListener (SWT.MouseDoubleClick, listener); + addListener (SWT.Dispose, listener); + addListener (SWT.Resize, listener); + addListener (SWT.KeyDown, listener); + addListener (SWT.FocusOut, listener); + addListener (SWT.FocusIn, listener); + addListener (SWT.Traverse, listener); + + header = new Canvas (this, SWT.NO_REDRAW_RESIZE | SWT.NO_FOCUS); + header.setVisible (false); + header.setBounds (0, 0, 0, fontHeight + 2 * getHeaderPadding ()); + header.addListener (SWT.Paint, listener); + header.addListener (SWT.MouseDown, listener); + header.addListener (SWT.MouseUp, listener); + header.addListener (SWT.MouseHover, listener); + header.addListener (SWT.MouseDoubleClick, listener); + header.addListener (SWT.MouseMove, listener); + header.addListener (SWT.MouseExit, listener); + header.addListener (SWT.MenuDetect, listener); + + toolTipListener = new Listener () { + public void handleEvent (Event event) { + switch (event.type) { + case SWT.MouseHover: + case SWT.MouseMove: + if (headerUpdateToolTip (event.x)) break; + // FALL THROUGH + case SWT.MouseExit: + case SWT.MouseDown: + headerHideToolTip (); + break; + } + } + }; + + ScrollBar hBar = getHorizontalBar (); + if (hBar != null) { + hBar.setValues (0, 0, 1, 1, 1, 1); + hBar.setVisible (false); + hBar.addListener (SWT.Selection, listener); + } + ScrollBar vBar = getVerticalBar (); + if (vBar != null) { + vBar.setValues (0, 0, 1, 1, 1, 1); + vBar.setVisible (false); + vBar.addListener (SWT.Selection, listener); + } +} +/** + * Adds the listener to the collection of listeners who will + * be notified when the user changes the receiver's selection, by sending + * it one of the messages defined in the <code>SelectionListener</code> + * interface. + * <p> + * When <code>widgetSelected</code> is called, the item field of the event object is valid. + * If the receiver has the <code>SWT.CHECK</code> style and the check selection changes, + * the event object detail field contains the value <code>SWT.CHECK</code>. + * <code>widgetDefaultSelected</code> is typically called when an item is double-clicked. + * The item field of the event object is valid for default selection, but the detail field is not used. + * </p> + * + * @param listener the listener which should be notified when the user changes the receiver's selection + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see SelectionListener + * @see #removeSelectionListener + * @see SelectionEvent + */ +public void addSelectionListener (SelectionListener listener) { + checkWidget (); + if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); + TypedListener typedListener = new TypedListener (listener); + addListener (SWT.Selection, typedListener); + addListener (SWT.DefaultSelection, typedListener); +} +/** + * Adds the listener to the collection of listeners who will + * be notified when an item in the receiver is expanded or collapsed + * by sending it one of the messages defined in the <code>TreeListener</code> + * interface. + * + * @param listener the listener which should be notified + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see TreeListener + * @see #removeTreeListener + */ +public void addTreeListener (TreeListener listener) { + checkWidget (); + if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); + TypedListener typedListener = new TypedListener (listener); + addListener (SWT.Expand, typedListener); + addListener (SWT.Collapse, typedListener); +} +boolean checkData (TreeItem item, boolean redraw) { + if (item.cached) return true; + if ((style & SWT.VIRTUAL) != 0) { + item.cached = true; + Event event = new Event (); + TreeItem parentItem = item.getParentItem (); + event.item = item; + event.index = parentItem == null ? indexOf (item) : parentItem.indexOf (item); + sendEvent (SWT.SetData, event); + if (isDisposed () || item.isDisposed ()) return false; + if (redraw) redrawItem (item.availableIndex, false); + } + return true; +} +static int checkStyle (int style) { + /* + * Feature in Windows. Even when WS_HSCROLL or + * WS_VSCROLL is not specified, Windows creates + * trees and tables with scroll bars. The fix + * is to set H_SCROLL and V_SCROLL. + * + * NOTE: This code appears on all platforms so that + * applications have consistent scroll bar behavior. + */ + if ((style & SWT.NO_SCROLL) == 0) { + style |= SWT.H_SCROLL | SWT.V_SCROLL; + } + style |= SWT.NO_REDRAW_RESIZE | SWT.NO_BACKGROUND | SWT.DOUBLE_BUFFERED; + //TEMPORARY CODE + style |= SWT.FULL_SELECTION; + return checkBits (style, SWT.SINGLE, SWT.MULTI, 0, 0, 0, 0); +} +protected void checkSubclass () { + if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS); +} +/** + * Clears the item at the given zero-relative index in the receiver. + * The text, icon and other attributes of the item are set to the default + * value. If the tree was created with the <code>SWT.VIRTUAL</code> style, + * these attributes are requested again as needed. + * + * @param index the index of the item to clear + * @param all <code>true</code> if all child items of the indexed item should be + * cleared recursively, and <code>false</code> otherwise + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see SWT#VIRTUAL + * @see SWT#SetData + * + * @since 3.2 + */ +public void clear (int index, boolean recursive) { + checkWidget (); + if (!(0 <= index && index < items.length)) error (SWT.ERROR_INVALID_RANGE); + TreeItem item = items [index]; + + /* if there are no columns then the horizontal scrollbar may need adjusting */ + TreeItem[] availableDescendents = null; + int oldRightX = 0; + if (columns.length == 0) { + if (recursive) { + availableDescendents = item.computeAvailableDescendents (); + for (int i = 0; i < availableDescendents.length; i++) { + Rectangle bounds = availableDescendents [i].getBounds (false); + oldRightX = Math.max (oldRightX, bounds.x + bounds.width); + } + } else { + Rectangle bounds = item.getBounds (false); + oldRightX = bounds.x + bounds.width; + } + } + + /* clear the item(s) */ + item.clear (); + if (recursive) { + item.clearAll (true, false); + } + + /* adjust the horizontal scrollbar if needed */ + if (columns.length == 0) { + int newRightX = 0; + if (recursive) { + for (int i = 0; i < availableDescendents.length; i++) { + Rectangle bounds = availableDescendents [i].getBounds (false); + newRightX = Math.max (newRightX, bounds.x + bounds.width); + } + } else { + Rectangle bounds = item.getBounds (false); + newRightX = bounds.x + bounds.width; + } + updateHorizontalBar (newRightX, newRightX - oldRightX); + } + + /* redraw the item(s) */ + if (recursive && item.expanded) { + int descendentCount = availableDescendents == null ? + item.computeAvailableDescendentCount () : + availableDescendents.length; + redrawItems (item.availableIndex, item.availableIndex + descendentCount - 1, false); + } else { + redrawItem (item.availableIndex, false); + } +} +/** + * Clears all the items in the receiver. The text, icon and other + * attributes of the items are set to their default values. If the + * tree was created with the <code>SWT.VIRTUAL</code> style, these + * attributes are requested again as needed. + * + * @param all <code>true</code> if all child items should be cleared + * recursively, and <code>false</code> otherwise + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see SWT#VIRTUAL + * @see SWT#SetData + * + * @since 3.2 + */ +public void clearAll (boolean recursive) { + checkWidget (); + if (items.length == 0) return; + + /* if there are no columns then the horizontal scrollbar may need adjusting */ + int oldRightX = 0; + if (columns.length == 0 && !recursive) { + for (int i = 0; i < items.length; i++) { + Rectangle bounds = items [i].getBounds (false); + oldRightX = Math.max (oldRightX, bounds.x + bounds.width); + } + } + + /* clear the item(s) */ + for (int i = 0; i < items.length; i++) { + items [i].clear (); + if (recursive) items [i].clearAll (true, false); + } + + /* adjust the horizontal scrollbar if needed */ + if (columns.length == 0) { + if (recursive) { + updateHorizontalBar (); /* recompute from scratch */ + } else { + /* + * All cleared root items will have the same x and width values now, + * so just measure the first one as a sample. + */ + Rectangle bounds = items [0].getBounds (false); + int newRightX = bounds.x + bounds.width; + updateHorizontalBar (newRightX, newRightX - oldRightX); + } + } + + /* redraw the item(s) */ + if (recursive) { + redrawItems (0, availableItemsCount - 1, false); + } else { + for (int i = 0; i < items.length; i++) { + redrawItem (items [i].availableIndex, false); + } + } +} +/* + * Returns the ORDERED index of the column that the specified x falls within, + * or -1 if the x lies to the right of the last column. + */ +int computeColumnIntersect (int x, int startColumn) { + TreeColumn[] orderedColumns = getOrderedColumns (); + if (orderedColumns.length - 1 < startColumn) return -1; + int rightX = orderedColumns [startColumn].getX (); + for (int i = startColumn; i < orderedColumns.length; i++) { + rightX += orderedColumns [i].width; + if (x < rightX) return i; + } + return -1; +} +public Point computeSize (int wHint, int hHint, boolean changed) { + checkWidget (); + int width = 0, height = 0; + if (wHint != SWT.DEFAULT) { + width = wHint; + } else { + if (columns.length == 0) { + for (int i = 0; i < availableItemsCount; i++) { + Rectangle itemBounds = availableItems [i].getBounds (false); + width = Math.max (width, itemBounds.x + itemBounds.width); + } + } else { + TreeColumn[] orderedColumns = getOrderedColumns (); + TreeColumn lastColumn = orderedColumns [orderedColumns.length - 1]; + width = lastColumn.getX () + lastColumn.width; + } + } + if (hHint != SWT.DEFAULT) { + height = hHint; + } else { + height = getHeaderHeight () + availableItemsCount * itemHeight; + } + Rectangle result = computeTrim (0, 0, width, height); + return new Point (result.width, result.height); +} +void createItem (TreeColumn column, int index) { + TreeColumn[] newColumns = new TreeColumn [columns.length + 1]; + System.arraycopy (columns, 0, newColumns, 0, index); + newColumns [index] = column; + System.arraycopy (columns, index, newColumns, index + 1, columns.length - index); + columns = newColumns; + + if (orderedColumns != null) { + int insertIndex = 0; + if (index > 0) { + insertIndex = columns [index - 1].getOrderIndex () + 1; + } + TreeColumn[] newOrderedColumns = new TreeColumn [orderedColumns.length + 1]; + System.arraycopy (orderedColumns, 0, newOrderedColumns, 0, insertIndex); + newOrderedColumns [insertIndex] = column; + System.arraycopy ( + orderedColumns, + insertIndex, + newOrderedColumns, + insertIndex + 1, + orderedColumns.length - insertIndex); + orderedColumns = newOrderedColumns; + } + + if (columns.length == 1) { + column.itemImageWidth = orderedCol0imageWidth; + } else { + if (column.getOrderIndex () == 0) orderedCol0imageWidth = 0; + } + + /* allow all items to update their internal structures accordingly */ + for (int i = 0; i < items.length; i++) { + items [i].addColumn (column); + } + + /* existing items become hidden when going from 0 to 1 column (0 width) */ + if (columns.length == 1 && availableItemsCount > 0) { + redrawFromItemDownwards (topIndex); + } else { + /* checkboxes become hidden when creating a column with index == ordered index == 0 (0 width) */ + if (availableItemsCount > 0 && (style & SWT.CHECK) != 0 && index == 0 && column.getOrderIndex () == 0) { + redrawFromItemDownwards (topIndex); + } + } +} +void createItem (TreeItem item, int index) { + TreeItem[] newItems = new TreeItem [items.length + 1]; + System.arraycopy (items, 0, newItems, 0, index); + newItems [index] = item; + System.arraycopy (items, index, newItems, index + 1, items.length - index); + items = newItems; + + /* determine the item's availability index */ + int startIndex; + if (index == items.length - 1) { + startIndex = availableItemsCount; /* last item */ + } else { + startIndex = items [index + 1].availableIndex; + } + + if (availableItemsCount == availableItems.length) { + int grow = drawCount <= 0 ? 4 : Math.max (4, availableItems.length * 3 / 2); + TreeItem[] newAvailableItems = new TreeItem [availableItems.length + grow]; + System.arraycopy (availableItems, 0, newAvailableItems, 0, availableItems.length); + availableItems = newAvailableItems; + } + if (startIndex != availableItemsCount) { + /* new item is not at end of list, so shift other items right to create space for it */ + System.arraycopy ( + availableItems, + startIndex, + availableItems, + startIndex + 1, + availableItemsCount - startIndex); + } + availableItems [startIndex] = item; + availableItemsCount++; + + /* update the availableIndex for items bumped down by this new item */ + for (int i = startIndex; i < availableItemsCount; i++) { + availableItems [i].availableIndex = i; + } + + /* update scrollbars */ + updateVerticalBar (); + Rectangle bounds = item.getBounds (false); + int rightX = bounds.x + bounds.width; + updateHorizontalBar (rightX, rightX); + /* + * If new item is above viewport then adjust topIndex and the vertical + * scrollbar so that the current viewport items will not change. + */ + if (item.availableIndex < topIndex) { + topIndex++; + ScrollBar vBar = getVerticalBar (); + if (vBar != null) vBar.setSelection (topIndex); + return; + } + /* + * If this is the first item and the receiver has focus then its boundary + * focus ring must be removed. + */ + if (availableItemsCount == 1 && isFocusControl ()) { + focusItem = item; + redraw (); + return; + } + int redrawIndex = index; + if (redrawIndex > 0 && item.isLastChild ()) redrawIndex--; + redrawFromItemDownwards (items [redrawIndex].availableIndex); +} +/** + * Deselects an item in the receiver. If the item was already + * deselected, it remains deselected. + * + * @param item the item to be deselected + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the item is null</li> + * <li>ERROR_INVALID_ARGUMENT - if the item has been disposed</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 3.4 + */ +public void deselect (TreeItem item) { + checkWidget (); + if (item == null) error (SWT.ERROR_NULL_ARGUMENT); + if (item.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT); + deselectItem (item); + redrawItem (item.availableIndex, true); +} +/** + * Deselects all selected items in the receiver. + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void deselectAll () { + checkWidget (); + TreeItem[] oldSelection = selectedItems; + selectedItems = NO_ITEMS; + for (int i = 0; i < oldSelection.length; i++) { + redrawItem (oldSelection [i].availableIndex, true); + } +} +void deselectItem (TreeItem item) { + int index = getSelectionIndex (item); + if (index == -1) return; + TreeItem[] newSelectedItems = new TreeItem [selectedItems.length - 1]; + System.arraycopy (selectedItems, 0, newSelectedItems, 0, index); + System.arraycopy ( + selectedItems, + index + 1, + newSelectedItems, + index, + newSelectedItems.length - index); + selectedItems = newSelectedItems; +} +void destroyItem (TreeColumn column) { + headerHideToolTip (); + int index = column.getIndex (); + int orderedIndex = column.getOrderIndex (); + + TreeColumn[] newColumns = new TreeColumn [columns.length - 1]; + System.arraycopy (columns, 0, newColumns, 0, index); + System.arraycopy (columns, index + 1, newColumns, index, newColumns.length - index); + columns = newColumns; + + if (orderedColumns != null) { + if (columns.length < 2) { + orderedColumns = null; + } else { + int removeIndex = column.getOrderIndex (); + TreeColumn[] newOrderedColumns = new TreeColumn [orderedColumns.length - 1]; + System.arraycopy (orderedColumns, 0, newOrderedColumns, 0, removeIndex); + System.arraycopy ( + orderedColumns, + removeIndex + 1, + newOrderedColumns, + removeIndex, + newOrderedColumns.length - removeIndex); + orderedColumns = newOrderedColumns; + } + } + + if (orderedIndex == 0 && columns.length > 0) { + orderedCol0imageWidth = columns [getColumnOrder ()[0]].itemImageWidth; + } + + /* allow all items to update their internal structures accordingly */ + for (int i = 0; i < items.length; i++) { + items [i].removeColumn (column, index, orderedIndex); + } + + /* update horizontal scrollbar */ + int lastColumnIndex = columns.length - 1; + if (lastColumnIndex < 0) { /* no more columns */ + updateHorizontalBar (); + } else { + int newWidth = 0; + for (int i = 0; i < columns.length; i++) { + newWidth += columns [i].width; + } + ScrollBar hBar = getHorizontalBar (); + if (hBar != null) { + hBar.setMaximum (newWidth); + hBar.setVisible (clientArea.width < newWidth); + int selection = hBar.getSelection (); + if (selection != horizontalOffset) { + horizontalOffset = selection; + redraw (); + if (header.isVisible () && drawCount <= 0) header.redraw (); + } + } + } + TreeColumn[] orderedColumns = getOrderedColumns (); + for (int i = orderedIndex; i < orderedColumns.length; i++) { + if (!orderedColumns [i].isDisposed ()) { + orderedColumns [i].sendEvent (SWT.Move); + } + } + + if (sortColumn == column) { + sortColumn = null; + } +} +/* + * Allows the Tree to update internal structures it has that may contain the + * item being destroyed. The argument is not necessarily a root-level item. + */ +void destroyItem (TreeItem item) { + if (item == focusItem) reassignFocus (); + + /* availableItems array */ + int availableIndex = item.availableIndex; + if (availableIndex != -1) { + Rectangle bounds = item.getBounds (false); + int rightX = bounds.x + bounds.width; + + if (availableIndex != availableItemsCount - 1) { + /* item is not at end of available items list, so must shift items left to reclaim its slot */ + System.arraycopy ( + availableItems, + availableIndex + 1, + availableItems, + availableIndex, + availableItemsCount - availableIndex - 1); + availableItems [availableItemsCount - 1] = null; + } else { + availableItems [availableIndex] = null; /* last item, so no array copy needed */ + } + availableItemsCount--; + + if (drawCount <= 0 && availableItems.length - availableItemsCount == 4) { + /* shrink the available items array */ + TreeItem[] newAvailableItems = new TreeItem [availableItemsCount]; + System.arraycopy (availableItems, 0, newAvailableItems, 0, newAvailableItems.length); + availableItems = newAvailableItems; + } + + /* update the availableIndex on affected items */ + for (int i = availableIndex; i < availableItemsCount; i++) { + availableItems [i].availableIndex = i; + } + item.availableIndex = -1; + int oldTopIndex = topIndex; + updateVerticalBar (); + updateHorizontalBar (0, -rightX); + /* + * If destroyed item is above viewport then adjust topIndex and the vertical + * scrollbar so that the current viewport items will not change. + */ + if (availableIndex < topIndex) { + topIndex = oldTopIndex - 1; + ScrollBar vBar = getVerticalBar (); + if (vBar != null) vBar.setSelection (topIndex); + } + } + /* selectedItems array */ + if (item.isSelected ()) { + int selectionIndex = getSelectionIndex (item); + TreeItem[] newSelectedItems = new TreeItem [selectedItems.length - 1]; + System.arraycopy (selectedItems, 0, newSelectedItems, 0, selectionIndex); + System.arraycopy ( + selectedItems, + selectionIndex + 1, + newSelectedItems, + selectionIndex, + newSelectedItems.length - selectionIndex); + selectedItems = newSelectedItems; + } + /* root-level items array */ + if (item.depth == 0) { + int index = item.getIndex (); + TreeItem[] newItems = new TreeItem [items.length - 1]; + System.arraycopy (items, 0, newItems, 0, index); + System.arraycopy (items, index + 1, newItems, index, newItems.length - index); + items = newItems; + } + if (item == anchorItem) anchorItem = null; + if (item == insertMarkItem) insertMarkItem = null; + if (item == lastClickedItem) lastClickedItem = null; + /* + * If this was the last item and the receiver has focus then its boundary + * focus ring must be redrawn. + */ + if (availableItemsCount == 0 && isFocusControl ()) { + redraw (); + return; + } +} +Image getArrowDownImage () { + return (Image) display.getData (ID_ARROWDOWN); +} +Image getArrowUpImage () { + return (Image) display.getData (ID_ARROWUP); +} +int getCellPadding () { + return MARGIN_CELL + WIDTH_CELL_HIGHLIGHT; +} +Image getCheckmarkImage () { + return (Image) display.getData (ID_CHECKMARK); +} +public Control[] getChildren () { + checkWidget (); + Control[] controls = _getChildren (); + if (header == null) return controls; + Control[] result = new Control [controls.length - 1]; + /* remove the Header from the returned set of children */ + int index = 0; + for (int i = 0; i < controls.length; i++) { + if (controls [i] != header) { + result [index++] = controls [i]; + } + } + return result; +} +Image getCollapsedImage () { + return (Image) display.getData (ID_COLLAPSED); +} +/** + * Returns the column at the given, zero-relative index in the + * receiver. Throws an exception if the index is out of range. + * Columns are returned in the order that they were created. + * If no <code>TreeColumn</code>s were created by the programmer, + * this method will throw <code>ERROR_INVALID_RANGE</code> despite + * the fact that a single column of data may be visible in the tree. + * This occurs when the programmer uses the tree like a list, adding + * items but never creating a column. + * + * @param index the index of the column to return + * @return the column at the given index + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see Tree#getColumnOrder() + * @see Tree#setColumnOrder(int[]) + * @see TreeColumn#getMoveable() + * @see TreeColumn#setMoveable(boolean) + * @see SWT#Move + * + * @since 3.1 + */ +public TreeColumn getColumn (int index) { + checkWidget (); + if (!(0 <= index && index < columns.length)) error (SWT.ERROR_INVALID_RANGE); + return columns [index]; +} +/** + * Returns the number of columns contained in the receiver. + * If no <code>TreeColumn</code>s were created by the programmer, + * this value is zero, despite the fact that visually, one column + * of items may be visible. This occurs when the programmer uses + * the tree like a list, adding items but never creating a column. + * + * @return the number of columns + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 3.1 + */ +public int getColumnCount () { + checkWidget (); + return columns.length; +} +/** + * Returns an array of zero-relative integers that map + * the creation order of the receiver's items to the + * order in which they are currently being displayed. + * <p> + * Specifically, the indices of the returned array represent + * the current visual order of the items, and the contents + * of the array represent the creation order of the items. + * </p><p> + * Note: This is not the actual structure used by the receiver + * to maintain its list of items, so modifying the array will + * not affect the receiver. + * </p> + * + * @return the current visual order of the receiver's items + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see Tree#setColumnOrder(int[]) + * @see TreeColumn#getMoveable() + * @see TreeColumn#setMoveable(boolean) + * @see SWT#Move + * + * @since 3.2 + */ +public int[] getColumnOrder () { + checkWidget (); + int[] result = new int [columns.length]; + if (orderedColumns != null) { + for (int i = 0; i < result.length; i++) { + result [i] = orderedColumns [i].getIndex (); + } + } else { + for (int i = 0; i < columns.length; i++) { + result [i] = i; + } + } + return result; +} +/** + * Returns an array of <code>TreeColumn</code>s which are the + * columns in the receiver. Columns are returned in the order + * that they were created. If no <code>TreeColumn</code>s were + * created by the programmer, the array is empty, despite the fact + * that visually, one column of items may be visible. This occurs + * when the programmer uses the tree like a list, adding items but + * never creating a column. + * <p> + * Note: This is not the actual structure used by the receiver + * to maintain its list of items, so modifying the array will + * not affect the receiver. + * </p> + * + * @return the items in the receiver + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see Tree#getColumnOrder() + * @see Tree#setColumnOrder(int[]) + * @see TreeColumn#getMoveable() + * @see TreeColumn#setMoveable(boolean) + * @see SWT#Move + * + * @since 3.1 + */ +public TreeColumn[] getColumns () { + checkWidget (); + TreeColumn[] result = new TreeColumn [columns.length]; + System.arraycopy (columns, 0, result, 0, columns.length); + return result; +} +Color getConnectorColor () { + return (Color) display.getData (ID_CONNECTOR_COLOR); +} +Image getExpandedImage () { + return (Image) display.getData (ID_EXPANDED); +} +Image getGrayUncheckedImage () { + return (Image) display.getData (ID_GRAYUNCHECKED); +} +/** + * Returns the width in pixels of a grid line. + * + * @return the width of a grid line in pixels + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 3.1 + */ +public int getGridLineWidth () { + checkWidget (); + return 1; +} +/** + * Returns the height of the receiver's header + * + * @return the height of the header or zero if the header is not visible + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 3.1 + */ +public int getHeaderHeight () { + checkWidget (); + if (!header.getVisible ()) return 0; + return header.getSize ().y; +} +int getHeaderPadding () { + return MARGIN_CELL + WIDTH_HEADER_SHADOW; +} +/** + * Returns <code>true</code> if the receiver's header is visible, + * and <code>false</code> otherwise. + * <p> + * If one of the receiver's ancestors is not visible or some + * other condition makes the receiver not visible, this method + * may still indicate that it is considered visible even though + * it may not actually be showing. + * </p> + * + * @return the receiver's header's visibility state + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 3.1 + */ +public boolean getHeaderVisible () { + checkWidget (); + return header.getVisible (); +} +/** + * Returns the item at the given point in the receiver + * or null if no such item exists. The point is in the + * coordinate system of the receiver. + * <p> + * The item that is returned represents an item that could be selected by the user. + * For example, if selection only occurs in items in the first column, then null is + * returned if the point is outside of the item. + * Note that the SWT.FULL_SELECTION style hint, which specifies the selection policy, + * determines the extent of the selection. + * </p> + * + * @param point the point used to locate the item + * @return the item at the given point, or null if the point is not in a selectable item + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the point is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public TreeItem getItem (Point point) { + checkWidget (); + if (point == null) error (SWT.ERROR_NULL_ARGUMENT); + int index = (point.y - getHeaderHeight ()) / itemHeight + topIndex; + if (!(0 <= index && index < availableItemsCount)) return null; /* below the last item */ + TreeItem result = availableItems [index]; + if (!result.getHitBounds ().contains (point)) return null; /* considers the x value */ + return result; +} +/** + * Returns the item at the given, zero-relative index in the + * receiver. Throws an exception if the index is out of range. + * + * @param index the index of the item to return + * @return the item at the given index + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 3.1 + */ +public TreeItem getItem (int index) { + checkWidget (); + if (!(0 <= index && index < items.length)) error (SWT.ERROR_INVALID_RANGE); + return items [index]; +} +/** + * Returns the number of items contained in the receiver + * that are direct item children of the receiver. The + * number that is returned is the number of roots in the + * tree. + * + * @return the number of items + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public int getItemCount () { + checkWidget (); + return items.length; +} +/** + * Returns the height of the area which would be used to + * display <em>one</em> of the items in the tree. + * + * @return the height of one item + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public int getItemHeight () { + checkWidget (); + return itemHeight; +} +/** + * Returns a (possibly empty) array of items contained in the + * receiver that are direct item children of the receiver. These + * are the roots of the tree. + * <p> + * Note: This is not the actual structure used by the receiver + * to maintain its list of items, so modifying the array will + * not affect the receiver. + * </p> + * + * @return the items + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public TreeItem[] getItems () { + checkWidget (); + TreeItem[] result = new TreeItem [items.length]; + System.arraycopy (items, 0, result, 0, items.length); + return result; +} +/* + * Returns the current y-coordinate that the specified item should have. + */ +int getItemY (TreeItem item) { + int index = item.availableIndex; + if (index == -1) return -1; + return (index - topIndex) * itemHeight + getHeaderHeight (); +} +/** + * Returns <code>true</code> if the receiver's lines are visible, + * and <code>false</code> otherwise. Note that some platforms draw + * grid lines while others may draw alternating row colors. + * <p> + * If one of the receiver's ancestors is not visible or some + * other condition makes the receiver not visible, this method + * may still indicate that it is considered visible even though + * it may not actually be showing. + * </p> + * + * @return the visibility state of the lines + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 3.1 + */ +public boolean getLinesVisible () { + checkWidget (); + return linesVisible; +} +TreeColumn[] getOrderedColumns () { + if (orderedColumns != null) return orderedColumns; + return columns; +} +/** + * Returns the receiver's parent item, which must be a + * <code>TreeItem</code> or null when the receiver is a + * root. + * + * @return the receiver's parent item + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public TreeItem getParentItem () { + checkWidget (); + return null; +} +/** + * Returns an array of <code>TreeItem</code>s that are currently + * selected in the receiver. The order of the items is unspecified. + * An empty array indicates that no items are selected. + * <p> + * Note: This is not the actual structure used by the receiver + * to maintain its selection, so modifying the array will + * not affect the receiver. + * </p> + * @return an array representing the selection + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public TreeItem[] getSelection () { + checkWidget (); + int count = selectedItems.length; + TreeItem[] result = new TreeItem [count]; + if (count > 0) { + if (count == 1) { + System.arraycopy (selectedItems, 0, result, 0, count); + } else { + getSelection (result, items, 0); + } + } + return result; +} +int getSelection (TreeItem[] result, TreeItem[] items, int index) { + for (int i = 0; i < items.length; i++) { + TreeItem item = items [i]; + if (item.isSelected ()) result [index++] = item; + if (index == result.length) break; + index = getSelection (result, items [i].items, index); + if (index == result.length) break; + } + return index; +} +/** + * Returns the number of selected items contained in the receiver. + * + * @return the number of selected items + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public int getSelectionCount () { + checkWidget (); + return selectedItems.length; +} +/* + * Returns the index of the argument in the receiver's array of currently- + * selected items, or -1 if the item is not currently selected. + */ +int getSelectionIndex (TreeItem item) { + for (int i = 0; i < selectedItems.length; i++) { + if (selectedItems [i] == item) return i; + } + return -1; +} +/** + * Returns the column which shows the sort indicator for + * the receiver. The value may be null if no column shows + * the sort indicator. + * + * @return the sort indicator + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see #setSortColumn(TreeColumn) + * + * @since 3.2 + */ +public TreeColumn getSortColumn () { + checkWidget (); + return sortColumn; +} +/** + * Returns the direction of the sort indicator for the receiver. + * The value will be one of <code>UP</code>, <code>DOWN</code> + * or <code>NONE</code>. + * + * @return the sort direction + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see #setSortDirection(int) + * + * @since 3.2 + */ +public int getSortDirection () { + checkWidget (); + return sortDirection; +} +/** + * Returns the item which is currently at the top of the receiver. + * This item can change when items are expanded, collapsed, scrolled + * or new items are added or removed. + * + * @return the item at the top of the receiver + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 2.1 + */ +public TreeItem getTopItem () { + checkWidget (); + if (availableItemsCount == 0) return null; + return availableItems [topIndex]; +} +Image getUncheckedImage () { + return (Image) display.getData (ID_UNCHECKED); +} +void handleEvents (Event event) { + switch (event.type) { + case SWT.Paint: + if (event.widget == header) { + headerOnPaint (event); + } else { + onPaint (event); + } + break; + case SWT.MenuDetect: { + notifyListeners (SWT.MenuDetect, event); + break; + } + case SWT.MouseDown: + if (event.widget == header) { + headerOnMouseDown (event); + } else { + onMouseDown (event); + } + break; + case SWT.MouseUp: + if (event.widget == header) { + headerOnMouseUp (event); + } else { + onMouseUp (event); + } + break; + case SWT.MouseHover: + headerOnMouseHover (event); break; + case SWT.MouseMove: + headerOnMouseMove (event); break; + case SWT.MouseDoubleClick: + if (event.widget == header) { + headerOnMouseDoubleClick (event); + } else { + onMouseDoubleClick (event); + } + break; + case SWT.MouseExit: + headerOnMouseExit (); break; + case SWT.Dispose: + onDispose (event); break; + case SWT.KeyDown: + onKeyDown (event); break; + case SWT.Resize: + onResize (event); break; + case SWT.Selection: + if (event.widget == getHorizontalBar ()) { + onScrollHorizontal (event); + } + if (event.widget == getVerticalBar ()) { + onScrollVertical (event); + } + break; + case SWT.FocusOut: + onFocusOut (); break; + case SWT.FocusIn: + onFocusIn (); break; + case SWT.Traverse: + switch (event.detail) { + case SWT.TRAVERSE_ESCAPE: + case SWT.TRAVERSE_RETURN: + case SWT.TRAVERSE_TAB_NEXT: + case SWT.TRAVERSE_TAB_PREVIOUS: + case SWT.TRAVERSE_PAGE_NEXT: + case SWT.TRAVERSE_PAGE_PREVIOUS: + event.doit = true; + break; + } + break; + } +} +String headerGetToolTip (int x) { + if (resizeColumn != null) return null; + int orderedIndex = computeColumnIntersect (x, 0); + if (orderedIndex == -1) return null; + TreeColumn[] orderedColumns = getOrderedColumns (); + TreeColumn column = orderedColumns [orderedIndex]; + if (column.toolTipText == null) return null; + + /* no tooltip should appear if the hover is at a column resize opportunity */ + int columnX = column.getX (); + if (orderedIndex > 0 && orderedColumns [orderedIndex - 1].resizable) { + /* left column bound is resizable */ + if (x - columnX <= TOLLERANCE_COLUMNRESIZE) return null; + } + if (column.resizable) { + /* right column bound is resizable */ + int columnRightX = columnX + column.width; + if (columnRightX - x <= TOLLERANCE_COLUMNRESIZE) return null; + } + return removeMnemonics (column.toolTipText); +} +void headerHideToolTip() { + if (toolTipShell == null) return; + for (int i = 0; i < toolTipEvents.length; i++) { + header.removeListener (toolTipEvents [i], toolTipListener); + } + toolTipShell.dispose (); + toolTipShell = null; + toolTipLabel = null; +} +void headerOnMouseDoubleClick (Event event) { + if (!isFocusControl ()) setFocus (); + if (columns.length == 0) return; + TreeColumn[] orderedColumns = getOrderedColumns (); + int x = -horizontalOffset; + for (int i = 0; i < orderedColumns.length; i++) { + TreeColumn column = orderedColumns [i]; + x += column.width; + if (event.x < x) { + /* found the clicked column */ + TreeColumn packColumn = null; + if (x - event.x <= TOLLERANCE_COLUMNRESIZE) { + /* clicked on column bound for this column */ + packColumn = column; + } else { + if (i > 0 && event.x - column.getX () <= TOLLERANCE_COLUMNRESIZE) { + /* clicked on column bound that applies to previous column */ + packColumn = orderedColumns [i - 1]; + } + } + if (packColumn != null) { + packColumn.pack (); + resizeColumn = null; + if (Math.abs (packColumn.getX () + packColumn.width - event.x) > TOLLERANCE_COLUMNRESIZE) { + /* column separator has relocated away from pointer location */ + setCursor (null); + } + return; + } + /* did not click on column separator, so just fire column event */ + Event newEvent = new Event (); + newEvent.widget = column; + column.postEvent (SWT.DefaultSelection, newEvent); + return; + } + } +} +void headerOnMouseDown (Event event) { + if (event.button != 1) return; + TreeColumn[] orderedColumns = getOrderedColumns (); + int x = -horizontalOffset; + for (int i = 0; i < orderedColumns.length; i++) { + TreeColumn column = orderedColumns [i]; + x += column.width; + /* if close to a resizable column separator line then begin column resize */ + if (column.resizable && Math.abs (x - event.x) <= TOLLERANCE_COLUMNRESIZE) { + resizeColumn = column; + resizeColumnX = x; + return; + } + /* + * If within column but not near separator line then start column drag + * if column is moveable, or just fire column Selection otherwise. + */ + if (event.x < x) { + if (column.moveable) { + /* open tracker on the dragged column's header cell */ + int columnX = column.getX (); + int pointerOffset = event.x - columnX; + headerHideToolTip (); + Tracker tracker = new Tracker (this, SWT.NONE); + tracker.setRectangles (new Rectangle[] { + new Rectangle (columnX, 0, column.width, getHeaderHeight ()) + }); + if (!tracker.open ()) return; /* cancelled */ + /* determine which column was dragged onto */ + Rectangle result = tracker.getRectangles () [0]; + int pointerX = result.x + pointerOffset; + if (pointerX < 0) return; /* dragged too far left */ + x = -horizontalOffset; + for (int destIndex = 0; destIndex < orderedColumns.length; destIndex++) { + TreeColumn destColumn = orderedColumns [destIndex]; + x += destColumn.width; + if (pointerX < x) { + int oldIndex = column.getOrderIndex (); + if (destIndex == oldIndex) { /* dragged onto self */ + Event newEvent = new Event (); + newEvent.widget = column; + column.postEvent (SWT.Selection, newEvent); + return; + } + int leftmostIndex = Math.min (destIndex, oldIndex); + int[] oldOrder = getColumnOrder (); + int[] newOrder = new int [oldOrder.length]; + System.arraycopy (oldOrder, 0, newOrder, 0, leftmostIndex); + if (leftmostIndex == oldIndex) { + /* column moving to the right */ + System.arraycopy (oldOrder, oldIndex + 1, newOrder, oldIndex, destIndex - oldIndex); + } else { + /* column moving to the left */ + System.arraycopy (oldOrder, destIndex, newOrder, destIndex + 1, oldIndex - destIndex); + } + newOrder [destIndex] = oldOrder [oldIndex]; + int rightmostIndex = Math.max (destIndex, oldIndex); + System.arraycopy ( + oldOrder, + rightmostIndex + 1, + newOrder, + rightmostIndex + 1, + newOrder.length - rightmostIndex - 1); + setColumnOrder (newOrder); + return; + } + } + return; /* dragged too far right */ + } + /* column is not moveable */ + Event newEvent = new Event (); + newEvent.widget = column; + column.postEvent (SWT.Selection, newEvent); + return; + } + } +} +void headerOnMouseExit () { + if (resizeColumn != null) return; + setCursor (null); /* ensure that a column resize cursor does not escape */ +} +void headerOnMouseHover (Event event) { + headerShowToolTip (event.x); +} +void headerOnMouseMove (Event event) { + if (resizeColumn == null) { + /* not currently resizing a column */ + for (int i = 0; i < columns.length; i++) { + TreeColumn column = columns [i]; + int x = column.getX () + column.width; + if (Math.abs (x - event.x) <= TOLLERANCE_COLUMNRESIZE) { + if (column.resizable) { + setCursor (display.getSystemCursor (SWT.CURSOR_SIZEWE)); + } else { + setCursor (null); + } + return; + } + } + setCursor (null); + return; + } + + /* currently resizing a column */ + + /* don't allow the resize x to move left of the column's x position */ + if (event.x <= resizeColumn.getX ()) return; + + /* redraw the resizing line at its new location */ + GC gc = new GC (this); + gc.setForeground (display.getSystemColor (SWT.COLOR_BLACK)); + int lineHeight = clientArea.height; + redraw (resizeColumnX - 1, 0, 1, lineHeight, false); + resizeColumnX = event.x; + gc.drawLine (resizeColumnX - 1, 0, resizeColumnX - 1, lineHeight); + gc.dispose (); +} +void headerOnMouseUp (Event event) { + if (resizeColumn == null) return; /* not resizing a column */ + + /* remove the resize line */ + GC gc = new GC (this); + redraw (resizeColumnX - 1, 0, 1, clientArea.height, false); + gc.dispose (); + + int newWidth = resizeColumnX - resizeColumn.getX (); + if (newWidth != resizeColumn.width) { + setCursor (null); + updateColumnWidth (resizeColumn, newWidth); + } + resizeColumnX = -1; + resizeColumn = null; +} +void headerOnPaint (Event event) { + TreeColumn[] orderedColumns = getOrderedColumns (); + int numColumns = orderedColumns.length; + GC gc = event.gc; + Rectangle clipping = gc.getClipping (); + int startColumn = -1, endColumn = -1; + if (numColumns > 0) { + startColumn = computeColumnIntersect (clipping.x, 0); + if (startColumn != -1) { /* the clip x is within a column's bounds */ + endColumn = computeColumnIntersect (clipping.x + clipping.width, startColumn); + if (endColumn == -1) endColumn = numColumns - 1; + } + } else { + startColumn = endColumn = 0; + } + + /* paint the column header shadow that spans the full header width */ + Point headerSize = header.getSize (); + headerPaintHShadows (gc, 0, 0, headerSize.x, headerSize.y); + + /* if all damage is to the right of the last column then finished */ + if (startColumn == -1) return; + + /* paint each of the column headers */ + if (numColumns == 0) return; /* no headers to paint */ + for (int i = startColumn; i <= endColumn; i++) { + headerPaintVShadows (gc, orderedColumns [i].getX (), 0, orderedColumns [i].width, headerSize.y); + orderedColumns [i].paint (gc); + } +} +void headerPaintHShadows (GC gc, int x, int y, int width, int height) { + gc.setClipping (x, y, width, height); + int endX = x + width; + gc.setForeground (display.getSystemColor (SWT.COLOR_WIDGET_HIGHLIGHT_SHADOW)); + gc.drawLine (x, y, endX, y); /* highlight shadow */ + gc.setForeground (display.getSystemColor (SWT.COLOR_WIDGET_NORMAL_SHADOW)); + gc.drawLine (x, height - 2, endX, height - 2); /* lowlight shadow */ + gc.setForeground (display.getSystemColor (SWT.COLOR_WIDGET_DARK_SHADOW)); + gc.drawLine (x, height - 1, endX, height - 1); /* outer shadow */ +} +void headerPaintVShadows (GC gc, int x, int y, int width, int height) { + gc.setClipping (x, y, width, height); + int endX = x + width; + gc.setForeground (display.getSystemColor (SWT.COLOR_WIDGET_HIGHLIGHT_SHADOW)); + gc.drawLine (x, y, x, y + height - 1); /* highlight shadow */ + gc.setForeground (display.getSystemColor (SWT.COLOR_WIDGET_NORMAL_SHADOW)); + gc.drawLine (endX - 2, y + 1, endX - 2, height - 2); /* light inner shadow */ + gc.setForeground (display.getSystemColor (SWT.COLOR_WIDGET_DARK_SHADOW)); + gc.drawLine (endX - 1, y, endX - 1, height - 1); /* dark outer shadow */ +} +void headerShowToolTip (int x) { + String tooltip = headerGetToolTip (x); + if (tooltip == null || tooltip.length () == 0) return; + + if (toolTipShell == null) { + toolTipShell = new Shell (getShell (), SWT.ON_TOP | SWT.TOOL); + toolTipLabel = new Label (toolTipShell, SWT.CENTER); + Display display = toolTipShell.getDisplay (); + toolTipLabel.setForeground (display.getSystemColor (SWT.COLOR_INFO_FOREGROUND)); + toolTipLabel.setBackground (display.getSystemColor (SWT.COLOR_INFO_BACKGROUND)); + for (int i = 0; i < toolTipEvents.length; i++) { + header.addListener (toolTipEvents [i], toolTipListener); + } + } + if (headerUpdateToolTip (x)) { + toolTipShell.setVisible (true); + } else { + headerHideToolTip (); + } +} +boolean headerUpdateToolTip (int x) { + String tooltip = headerGetToolTip (x); + if (tooltip == null || tooltip.length () == 0) return false; + if (tooltip.equals (toolTipLabel.getText ())) return true; + + toolTipLabel.setText (tooltip); + TreeColumn column = getOrderedColumns () [computeColumnIntersect (x, 0)]; + toolTipShell.setData (new Integer (column.getIndex ())); + Point labelSize = toolTipLabel.computeSize (SWT.DEFAULT, SWT.DEFAULT, true); + labelSize.x += 2; labelSize.y += 2; + toolTipLabel.setSize (labelSize); + toolTipShell.pack (); + /* + * On some platforms, there is a minimum size for a shell + * which may be greater than the label size. + * To avoid having the background of the tip shell showing + * around the label, force the label to fill the entire client area. + */ + Rectangle area = toolTipShell.getClientArea (); + toolTipLabel.setSize (area.width, area.height); + + /* Position the tooltip and ensure it's not located off the screen */ + Point cursorLocation = getDisplay ().getCursorLocation (); + int cursorHeight = 21; /* assuming cursor is 21x21 */ + Point size = toolTipShell.getSize (); + Rectangle rect = getMonitor ().getBounds (); + Point pt = new Point (cursorLocation.x, cursorLocation.y + cursorHeight + 2); + pt.x = Math.max (pt.x, rect.x); + if (pt.x + size.x > rect.x + rect.width) pt.x = rect.x + rect.width - size.x; + if (pt.y + size.y > rect.y + rect.height) pt.y = cursorLocation.y - 2 - size.y; + toolTipShell.setLocation (pt); + return true; +} +/** + * Searches the receiver's list starting at the first column + * (index 0) until a column is found that is equal to the + * argument, and returns the index of that column. If no column + * is found, returns -1. + * + * @param column the search column + * @return the index of the column + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the column is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 3.1 + */ +public int indexOf (TreeColumn column) { + checkWidget (); + if (column == null) error (SWT.ERROR_NULL_ARGUMENT); + if (column.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT); + return column.getIndex (); +} +/** + * Searches the receiver's list starting at the first item + * (index 0) until an item is found that is equal to the + * argument, and returns the index of that item. If no item + * is found, returns -1. + * + * @param item the search item + * @return the index of the item + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the item is null</li> + * <li>ERROR_INVALID_ARGUMENT - if the item has been disposed</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 3.1 + */ +public int indexOf (TreeItem item) { + checkWidget (); + if (item == null) error (SWT.ERROR_NULL_ARGUMENT); + if (item.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT); + if (item.parentItem != null || item.parent != this) return -1; + return item.getIndex (); +} +static void initImages (final Display display) { + PaletteData fourBit = new PaletteData (new RGB[] { + new RGB (0, 0, 0), new RGB (128, 0, 0), new RGB (0, 128, 0), new RGB (128, 128, 0), + new RGB (0, 0, 128), new RGB (128, 0, 128), new RGB (0, 128, 128), new RGB (128, 128, 128), + new RGB (192, 192, 192), new RGB (255, 0, 0), new RGB (0, 255, 0), new RGB (255, 255, 0), + new RGB (0, 0, 255), new RGB (255, 0, 255), new RGB (0, 255, 255), new RGB (255, 255, 255)}); + + if (display.getData (ID_EXPANDED) == null) { + ImageData expanded = new ImageData ( + 9, 9, 4, /* width, height, depth */ + fourBit, 4, + new byte[] { + 119, 119, 119, 119, 112, 0, 0, 0, + 127, -1, -1, -1, 112, 0, 0, 0, + 127, -1, -1, -1, 112, 0, 0, 0, + 127, -1, -1, -1, 112, 0, 0, 0, + 127, 0, 0, 15, 112, 0, 0, 0, + 127, -1, -1, -1, 112, 0, 0, 0, + 127, -1, -1, -1, 112, 0, 0, 0, + 127, -1, -1, -1, 112, 0, 0, 0, + 119, 119, 119, 119, 112, 0, 0, 0}); + expanded.transparentPixel = 15; /* use white for transparency */ + display.setData (ID_EXPANDED, new Image (display, expanded)); + } + + if (display.getData (ID_COLLAPSED) == null) { + ImageData collapsed = new ImageData ( + 9, 9, 4, /* width, height, depth */ + fourBit, 4, + new byte[] { + 119, 119, 119, 119, 112, 0, 0, 0, + 127, -1, -1, -1, 112, 0, 0, 0, + 127, -1, 15, -1, 112, 0, 0, 0, + 127, -1, 15, -1, 112, 0, 0, 0, + 127, 0, 0, 15, 112, 0, 0, 0, + 127, -1, 15, -1, 112, 0, 0, 0, + 127, -1, 15, -1, 112, 0, 0, 0, + 127, -1, -1, -1, 112, 0, 0, 0, + 119, 119, 119, 119, 112, 0, 0, 0}); + collapsed.transparentPixel = 15; /* use white for transparency */ + display.setData (ID_COLLAPSED, new Image (display, collapsed)); + } + + PaletteData arrowPalette = new PaletteData (new RGB[] { + new RGB (0, 0, 0), new RGB (255, 255, 255)}); + if (display.getData (ID_ARROWDOWN) == null) { + ImageData arrowDown = new ImageData ( + 7, 4, 1, + arrowPalette, 1, + new byte[] {0x00, (byte)0x83, (byte)0xC7, (byte)0xEF}); + arrowDown.transparentPixel = 0x1; /* use white for transparency */ + display.setData (ID_ARROWDOWN, new Image (display, arrowDown)); + } + if (display.getData (ID_ARROWUP) == null) { + ImageData arrowUp = new ImageData ( + 7, 4, 1, + arrowPalette, 1, + new byte[] {(byte)0xEF, (byte)0xC7, (byte)0x83, 0x00}); + arrowUp.transparentPixel = 0x1; /* use white for transparency */ + display.setData (ID_ARROWUP, new Image (display, arrowUp)); + } + + PaletteData checkMarkPalette = new PaletteData ( + new RGB[] {new RGB (0, 0, 0), new RGB (252, 3, 251)}); + byte[] checkbox = new byte[] {0, 0, 127, -64, 127, -64, 127, -64, 127, -64, 127, -64, 127, -64, 127, -64, 127, -64, 127, -64, 0, 0}; + ImageData checkmark = new ImageData (7, 7, 1, checkMarkPalette, 1, new byte[] {-4, -8, 112, 34, 6, -114, -34}); + checkmark.transparentPixel = 1; + if (display.getData (ID_CHECKMARK) == null) { + display.setData (ID_CHECKMARK, new Image (display, checkmark)); + } + + if (display.getData (ID_UNCHECKED) == null) { + PaletteData uncheckedPalette = new PaletteData ( + new RGB[] {new RGB (128, 128, 128), new RGB (255, 255, 255)}); + ImageData unchecked = new ImageData (11, 11, 1, uncheckedPalette, 2, checkbox); + display.setData (ID_UNCHECKED, new Image (display, unchecked)); + } + + if (display.getData (ID_GRAYUNCHECKED) == null) { + PaletteData grayUncheckedPalette = new PaletteData ( + new RGB[] {new RGB (128, 128, 128), new RGB (192, 192, 192)}); + ImageData grayUnchecked = new ImageData (11, 11, 1, grayUncheckedPalette, 2, checkbox); + display.setData (ID_GRAYUNCHECKED, new Image (display, grayUnchecked)); + } + + if (display.getData (ID_CONNECTOR_COLOR) == null) { + display.setData (ID_CONNECTOR_COLOR, new Color (display, 170, 170, 170)); + } + + display.disposeExec (new Runnable () { + public void run() { + Image expanded = (Image) display.getData (ID_EXPANDED); + if (expanded != null) expanded.dispose (); + Image collapsed = (Image) display.getData (ID_COLLAPSED); + if (collapsed != null) collapsed.dispose (); + Color connectorColor = (Color) display.getData (ID_CONNECTOR_COLOR); + if (connectorColor != null) connectorColor.dispose (); + Image unchecked = (Image) display.getData (ID_UNCHECKED); + if (unchecked != null) unchecked.dispose (); + Image grayUnchecked = (Image) display.getData (ID_GRAYUNCHECKED); + if (grayUnchecked != null) grayUnchecked.dispose (); + Image checkmark = (Image) display.getData (ID_CHECKMARK); + if (checkmark != null) checkmark.dispose (); + Image arrowDown = (Image) display.getData (ID_ARROWDOWN); + if (arrowDown != null) arrowDown.dispose (); + Image arrowUp = (Image) display.getData (ID_ARROWUP); + if (arrowUp != null) arrowUp.dispose (); + + display.setData (ID_EXPANDED, null); + display.setData (ID_COLLAPSED, null); + display.setData (ID_CONNECTOR_COLOR, null); + display.setData (ID_UNCHECKED, null); + display.setData (ID_GRAYUNCHECKED, null); + display.setData (ID_CHECKMARK, null); + display.setData (ID_ARROWDOWN, null); + display.setData (ID_ARROWUP, null); + } + }); +} +/* + * Important: Assumes that item just became available (ie.- was either created + * or the parent item was expanded) and the parent is available. + */ +void makeAvailable (TreeItem item) { + int parentItemCount = item.parentItem.items.length; + int index = 0; + if (parentItemCount == 1) { /* this is the only child of parentItem */ + index = item.parentItem.availableIndex + 1; + } else { + /* determine this item's index in its parent */ + int itemIndex = 0; + TreeItem[] items = item.parentItem.items; + for (int i = 0; i < items.length; i++) { + if (items [i] == item) { + itemIndex = i; + break; + } + } + if (itemIndex != parentItemCount - 1) { /* this is not the last child */ + index = items [itemIndex + 1].availableIndex; + } else { /* this is the last child */ + TreeItem previousItem = items [itemIndex - 1]; + index = previousItem.availableIndex + previousItem.computeAvailableDescendentCount (); + } + } + + if (availableItemsCount == availableItems.length) { + int grow = drawCount <= 0 ? 4 : Math.max (4, availableItems.length * 3 / 2); + TreeItem[] newAvailableItems = new TreeItem [availableItems.length + grow]; + System.arraycopy (availableItems, 0, newAvailableItems, 0, availableItems.length); + availableItems = newAvailableItems; + } + if (index != availableItemsCount) { + /* new item is not at end of list, so shift other items right to create space for it */ + System.arraycopy (availableItems, index, availableItems, index + 1, availableItemsCount - index); + } + availableItems [index] = item; + availableItemsCount++; + + /* update availableIndex as needed */ + for (int i = index; i < availableItemsCount; i++) { + availableItems [i].availableIndex = i; + } +} + +/* + * Important: Assumes that item is available and its descendents have just become + * available (ie.- they were either created or the item was expanded). + */ +void makeDescendentsAvailable (TreeItem item, TreeItem[] descendents) { + int itemAvailableIndex = item.availableIndex; + TreeItem[] newAvailableItems = new TreeItem [availableItemsCount + descendents.length - 1]; + + System.arraycopy (availableItems, 0, newAvailableItems, 0, itemAvailableIndex); + System.arraycopy (descendents, 0, newAvailableItems, itemAvailableIndex, descendents.length); + int startIndex = itemAvailableIndex + 1; + System.arraycopy ( + availableItems, + startIndex, + newAvailableItems, + itemAvailableIndex + descendents.length, + availableItemsCount - startIndex); + availableItems = newAvailableItems; + availableItemsCount = availableItems.length; + + /* update availableIndex as needed */ + for (int i = itemAvailableIndex; i < availableItemsCount; i++) { + availableItems [i].availableIndex = i; + } +} + +/* + * Important: Assumes that item is available and its descendents have just become + * unavailable (ie.- they were either disposed or the item was collapsed). + */ +void makeDescendentsUnavailable (TreeItem item, TreeItem[] descendents) { + int descendentsLength = descendents.length; + TreeItem[] newAvailableItems = new TreeItem [availableItemsCount - descendentsLength + 1]; + + System.arraycopy (availableItems, 0, newAvailableItems, 0, item.availableIndex + 1); + int startIndex = item.availableIndex + descendentsLength; + System.arraycopy ( + availableItems, + startIndex, + newAvailableItems, + item.availableIndex + 1, + availableItemsCount - startIndex); + availableItems = newAvailableItems; + availableItemsCount = availableItems.length; + + /* update availableIndexes */ + for (int i = 1; i < descendents.length; i++) { + /* skip the first descendent since this is the item being collapsed */ + descendents [i].availableIndex = -1; + } + for (int i = item.availableIndex; i < availableItemsCount; i++) { + availableItems [i].availableIndex = i; + } + + /* remove the selection from all descendents */ + for (int i = selectedItems.length - 1; i >= 0; i--) { + if (selectedItems [i] != item && selectedItems [i].hasAncestor (item)) { + removeSelectedItem (i); + } + } + + /* if the anchorItem is being hidden then clear it */ + if (anchorItem != null && anchorItem != item && anchorItem.hasAncestor (item)) { + anchorItem = null; + } +} +void onArrowDown (int stateMask) { + if ((stateMask & (SWT.SHIFT | SWT.CTRL)) == 0) { + /* Down Arrow with no modifiers */ + int newFocusIndex = focusItem.availableIndex + 1; + if (newFocusIndex == availableItemsCount) return; /* at bottom */ + selectItem (availableItems [newFocusIndex], false); + setFocusItem (availableItems [newFocusIndex], true); + redrawItem (newFocusIndex, true); + showItem (availableItems [newFocusIndex]); + Event newEvent = new Event (); + newEvent.item = availableItems [newFocusIndex]; + postEvent (SWT.Selection, newEvent); + return; + } + if ((style & SWT.SINGLE) != 0) { + if ((stateMask & SWT.CTRL) != 0) { + /* CTRL+Down Arrow, CTRL+Shift+Down Arrow */ + int visibleItemCount = (clientArea.height - getHeaderHeight ()) / itemHeight; + if (availableItemsCount <= topIndex + visibleItemCount) return; /* at bottom */ + update (); + topIndex++; + ScrollBar vBar = getVerticalBar (); + if (vBar != null) vBar.setSelection (topIndex); + GC gc = new GC (this); + gc.copyArea ( + 0, 0, + clientArea.width, clientArea.height, + 0, -itemHeight); + gc.dispose (); + return; + } + /* Shift+Down Arrow */ + int newFocusIndex = focusItem.availableIndex + 1; + if (newFocusIndex == availableItemsCount) return; /* at bottom */ + selectItem (availableItems [newFocusIndex], false); + setFocusItem (availableItems [newFocusIndex], true); + redrawItem (newFocusIndex, true); + showItem (availableItems [newFocusIndex]); + Event newEvent = new Event (); + newEvent.item = availableItems [newFocusIndex]; + postEvent (SWT.Selection, newEvent); + return; + } + /* SWT.MULTI */ + if ((stateMask & SWT.CTRL) != 0) { + if ((stateMask & SWT.SHIFT) != 0) { + /* CTRL+Shift+Down Arrow */ + int visibleItemCount = (clientArea.height - getHeaderHeight ()) / itemHeight; + if (availableItemsCount <= topIndex + visibleItemCount) return; /* at bottom */ + update (); + topIndex++; + ScrollBar vBar = getVerticalBar (); + if (vBar != null) vBar.setSelection (topIndex); + GC gc = new GC (this); + gc.copyArea ( + 0, 0, + clientArea.width, clientArea.height, + 0, -itemHeight); + gc.dispose (); + return; + } + /* CTRL+Down Arrow */ + int focusIndex = focusItem.availableIndex; + if (focusIndex == availableItemsCount - 1) return; /* at bottom */ + TreeItem newFocusItem = availableItems [focusIndex + 1]; + setFocusItem (newFocusItem, true); + redrawItem (newFocusItem.availableIndex, true); + showItem (newFocusItem); + return; + } + /* Shift+Down Arrow */ + int newFocusIndex = focusItem.availableIndex + 1; + if (newFocusIndex == availableItemsCount) return; /* at bottom */ + if (anchorItem == null) anchorItem = focusItem; + if (focusItem.availableIndex < anchorItem.availableIndex) { + deselectItem (focusItem); + redrawItem (focusItem.availableIndex, true); + } + selectItem (availableItems [newFocusIndex], true); + setFocusItem (availableItems [newFocusIndex], true); + redrawItem (newFocusIndex, true); + showItem (availableItems [newFocusIndex]); + Event newEvent = new Event (); + newEvent.item = availableItems [newFocusIndex]; + postEvent (SWT.Selection, newEvent); +} +void onArrowLeft (int stateMask) { + if ((stateMask & SWT.CTRL) != 0) { + /* CTRL+Left Arrow, CTRL+Shift+Left Arrow */ + if (horizontalOffset == 0) return; + int newSelection = Math.max (0, horizontalOffset - SIZE_HORIZONTALSCROLL); + update (); + GC gc = new GC (this); + gc.copyArea ( + 0, 0, + clientArea.width, clientArea.height, + horizontalOffset - newSelection, 0); + gc.dispose (); + if (header.getVisible ()) { + header.update (); + Rectangle headerClientArea = header.getClientArea (); + gc = new GC (header); + gc.copyArea ( + 0, 0, + headerClientArea.width, headerClientArea.height, + horizontalOffset - newSelection, 0); + gc.dispose(); + } + horizontalOffset = newSelection; + ScrollBar hBar = getHorizontalBar (); + if (hBar != null) hBar.setSelection (horizontalOffset); + return; + } + /* Left Arrow with no modifiers, Shift+Left Arrow */ + if (focusItem.expanded) { + focusItem.setExpanded (false); + Event newEvent = new Event (); + newEvent.item = focusItem; + sendEvent (SWT.Collapse, newEvent); + return; + } + TreeItem parentItem = focusItem.parentItem; + if (parentItem == null) return; + + selectItem (parentItem, false); + setFocusItem (parentItem, true); + redrawItem (parentItem.availableIndex, true); + showItem (parentItem); + Event newEvent = new Event (); + newEvent.item = parentItem; + postEvent (SWT.Selection, newEvent); +} +void onArrowRight (int stateMask) { + if ((stateMask & SWT.CTRL) != 0) { + /* CTRL+Right Arrow, CTRL+Shift+Right Arrow */ + ScrollBar hBar = getHorizontalBar (); + if (hBar != null) { + int maximum = hBar.getMaximum (); + int clientWidth = clientArea.width; + if ((horizontalOffset + clientWidth) == maximum) return; + if (maximum <= clientWidth) return; + int newSelection = Math.min (horizontalOffset + SIZE_HORIZONTALSCROLL, maximum - clientWidth); + update (); + GC gc = new GC (this); + gc.copyArea ( + 0, 0, + clientArea.width, clientArea.height, + horizontalOffset - newSelection, 0); + gc.dispose (); + if (header.getVisible ()) { + Rectangle headerClientArea = header.getClientArea (); + header.update (); + gc = new GC (header); + gc.copyArea ( + 0, 0, + headerClientArea.width, headerClientArea.height, + horizontalOffset - newSelection, 0); + gc.dispose(); + } + horizontalOffset = newSelection; + hBar.setSelection (horizontalOffset); + } + return; + } + /* Right Arrow with no modifiers, Shift+Right Arrow */ + TreeItem[] children = focusItem.items; + if (children.length == 0) return; + if (!focusItem.expanded) { + focusItem.setExpanded (true); + Event newEvent = new Event (); + newEvent.item = focusItem; + inExpand = true; + sendEvent (SWT.Expand, newEvent); + inExpand = false; + if (isDisposed ()) return; + if (focusItem.items.length == 0) { + focusItem.expanded = false; + } + return; + } + selectItem (children [0], false); + setFocusItem (children [0], true); + redrawItem (children [0].availableIndex, true); + showItem (children [0]); + Event newEvent = new Event (); + newEvent.item = children [0]; + postEvent (SWT.Selection, newEvent); +} +void onArrowUp (int stateMask) { + if ((stateMask & (SWT.SHIFT | SWT.CTRL)) == 0) { + /* Up Arrow with no modifiers */ + int newFocusIndex = focusItem.availableIndex - 1; + if (newFocusIndex < 0) return; /* at top */ + TreeItem item = availableItems [newFocusIndex]; + selectItem (item, false); + setFocusItem (item, true); + redrawItem (newFocusIndex, true); + showItem (item); + Event newEvent = new Event (); + newEvent.item = item; + postEvent (SWT.Selection, newEvent); + return; + } + if ((style & SWT.SINGLE) != 0) { + if ((stateMask & SWT.CTRL) != 0) { + /* CTRL+Up Arrow, CTRL+Shift+Up Arrow */ + if (topIndex == 0) return; /* at top */ + update (); + topIndex--; + ScrollBar vBar = getVerticalBar (); + if (vBar != null) vBar.setSelection (topIndex); + GC gc = new GC (this); + gc.copyArea ( + 0, 0, + clientArea.width, clientArea.height, + 0, itemHeight); + gc.dispose (); + return; + } + /* Shift+Up Arrow */ + int newFocusIndex = focusItem.availableIndex - 1; + if (newFocusIndex < 0) return; /* at top */ + TreeItem item = availableItems [newFocusIndex]; + selectItem (item, false); + setFocusItem (item, true); + redrawItem (newFocusIndex, true); + showItem (item); + Event newEvent = new Event (); + newEvent.item = item; + postEvent (SWT.Selection, newEvent); + return; + } + /* SWT.MULTI */ + if ((stateMask & SWT.CTRL) != 0) { + if ((stateMask & SWT.SHIFT) != 0) { + /* CTRL+Shift+Up Arrow */ + if (topIndex == 0) return; /* at top */ + update (); + topIndex--; + ScrollBar vBar = getVerticalBar (); + if (vBar != null) vBar.setSelection (topIndex); + GC gc = new GC (this); + gc.copyArea ( + 0, 0, + clientArea.width, clientArea.height, + 0, itemHeight); + gc.dispose (); + return; + } + /* CTRL+Up Arrow */ + int focusIndex = focusItem.availableIndex; + if (focusIndex == 0) return; /* at top */ + TreeItem newFocusItem = availableItems [focusIndex - 1]; + setFocusItem (newFocusItem, true); + showItem (newFocusItem); + redrawItem (newFocusItem.availableIndex, true); + return; + } + /* Shift+Up Arrow */ + int newFocusIndex = focusItem.availableIndex - 1; + if (newFocusIndex < 0) return; /* at top */ + if (anchorItem == null) anchorItem = focusItem; + if (anchorItem.availableIndex < focusItem.availableIndex) { + deselectItem (focusItem); + redrawItem (focusItem.availableIndex, true); + } + TreeItem item = availableItems [newFocusIndex]; + selectItem (item, true); + setFocusItem (item, true); + redrawItem (newFocusIndex, true); + showItem (item); + Event newEvent = new Event (); + newEvent.item = item; + postEvent (SWT.Selection, newEvent); +} +void onCR () { + if (focusItem == null) return; + Event event = new Event (); + event.item = focusItem; + postEvent (SWT.DefaultSelection, event); +} +void onDispose (Event event) { + if (isDisposed ()) return; + if (ignoreDispose) return; + ignoreDispose = true; + notifyListeners(SWT.Dispose, event); + event.type = SWT.None; + for (int i = 0; i < items.length; i++) { + items [i].dispose (false); + } + for (int i = 0; i < columns.length; i++) { + columns [i].dispose (false); + } + if (toolTipShell != null) { + toolTipShell.dispose (); + toolTipShell = null; + toolTipLabel = null; + } + toolTipListener = null; + topIndex = availableItemsCount = horizontalOffset = 0; + availableItems = items = selectedItems = null; + columns = orderedColumns = null; + focusItem = anchorItem = insertMarkItem = lastClickedItem = null; + lastSelectionEvent = null; + header = null; + resizeColumn = sortColumn = null; + expanderBounds = null; +} +void onEnd (int stateMask) { + int lastAvailableIndex = availableItemsCount - 1; + if ((stateMask & (SWT.CTRL | SWT.SHIFT)) == 0) { + /* End with no modifiers */ + if (focusItem.availableIndex == lastAvailableIndex) return; /* at bottom */ + TreeItem item = availableItems [lastAvailableIndex]; + selectItem (item, false); + setFocusItem (item, true); + redrawItem (lastAvailableIndex, true); + showItem (item); + Event newEvent = new Event (); + newEvent.item = item; + postEvent (SWT.Selection, newEvent); + return; + } + if ((style & SWT.SINGLE) != 0) { + if ((stateMask & SWT.CTRL) != 0) { + /* CTRL+End, CTRL+Shift+End */ + int visibleItemCount = (clientArea.height - getHeaderHeight ()) / itemHeight; + setTopItem (availableItems [availableItemsCount - visibleItemCount]); + return; + } + /* Shift+End */ + if (focusItem.availableIndex == lastAvailableIndex) return; /* at bottom */ + TreeItem item = availableItems [lastAvailableIndex]; + selectItem (item, false); + setFocusItem (item, true); + redrawItem (lastAvailableIndex, true); + showItem (item); + Event newEvent = new Event (); + newEvent.item = item; + postEvent (SWT.Selection, newEvent); + return; + } + /* SWT.MULTI */ + if ((stateMask & SWT.CTRL) != 0) { + if ((stateMask & SWT.SHIFT) != 0) { + /* CTRL+Shift+End */ + showItem (availableItems [lastAvailableIndex]); + return; + } + /* CTRL+End */ + if (focusItem.availableIndex == lastAvailableIndex) return; /* at bottom */ + TreeItem item = availableItems [lastAvailableIndex]; + setFocusItem (item, true); + showItem (item); + redrawItem (item.availableIndex, true); + return; + } + /* Shift+End */ + if (anchorItem == null) anchorItem = focusItem; + TreeItem selectedItem = availableItems [lastAvailableIndex]; + if (selectedItem == focusItem && selectedItem.isSelected ()) return; + int anchorIndex = anchorItem.availableIndex; + int selectIndex = selectedItem.availableIndex; + TreeItem[] newSelection = new TreeItem [selectIndex - anchorIndex + 1]; + int writeIndex = 0; + for (int i = anchorIndex; i <= selectIndex; i++) { + newSelection [writeIndex++] = availableItems [i]; + } + setSelection (newSelection, false); + setFocusItem (selectedItem, true); + redrawItems (anchorIndex, selectIndex, true); + showItem (selectedItem); + Event newEvent = new Event (); + newEvent.item = selectedItem; + postEvent (SWT.Selection, newEvent); +} +void onFocusIn () { + hasFocus = true; + + if (items.length == 0) { + redraw (); + return; + } + if (focusItem != null) { + redrawItem (focusItem.availableIndex, true); + return; + } + /* an initial focus item must be selected */ + TreeItem initialFocus = null; + if (selectedItems.length > 0) { + for (int i = 0; i < selectedItems.length && initialFocus == null; i++) { + if (selectedItems [i].isAvailable ()) { + initialFocus = selectedItems [i]; + } + } + if (initialFocus == null) { + /* none of the selected items are available */ + initialFocus = availableItems [topIndex]; + } + } else { + initialFocus = availableItems [topIndex]; + } + setFocusItem (initialFocus, false); + redrawItem (initialFocus.availableIndex, true); + return; +} +void onFocusOut () { + hasFocus = false; + + if (items.length == 0) { + redraw (); + return; + } + + if (focusItem != null) { + redrawItem (focusItem.availableIndex, true); + } +} +void onHome (int stateMask) { + if ((stateMask & (SWT.CTRL | SWT.SHIFT)) == 0) { + /* Home with no modifiers */ + if (focusItem.availableIndex == 0) return; /* at top */ + TreeItem item = availableItems [0]; + selectItem (item, false); + setFocusItem (item, true); + redrawItem (0, true); + showItem (item); + Event newEvent = new Event (); + newEvent.item = item; + postEvent (SWT.Selection, newEvent); + return; + } + if ((style & SWT.SINGLE) != 0) { + if ((stateMask & SWT.CTRL) != 0) { + /* CTRL+Home, CTRL+Shift+Home */ + setTopItem (availableItems [0]); + return; + } + /* Shift+Home */ + if (focusItem.availableIndex == 0) return; /* at top */ + TreeItem item = availableItems [0]; + selectItem (item, false); + setFocusItem (item, true); + redrawItem (0, true); + showItem (item); + Event newEvent = new Event (); + newEvent.item = item; + postEvent (SWT.Selection, newEvent); + return; + } + /* SWT.MULTI */ + if ((stateMask & SWT.CTRL) != 0) { + if ((stateMask & SWT.SHIFT) != 0) { + /* CTRL+Shift+Home */ + setTopItem (availableItems [0]); + return; + } + /* CTRL+Home */ + if (focusItem.availableIndex == 0) return; /* at top */ + TreeItem item = availableItems [0]; + setFocusItem (item, true); + showItem (item); + redrawItem (item.availableIndex, true); + return; + } + /* Shift+Home */ + if (anchorItem == null) anchorItem = focusItem; + TreeItem selectedItem = availableItems [0]; + if (selectedItem == focusItem && selectedItem.isSelected ()) return; + int anchorIndex = anchorItem.availableIndex; + int selectIndex = selectedItem.availableIndex; + TreeItem[] newSelection = new TreeItem [anchorIndex + 1]; + int writeIndex = 0; + for (int i = anchorIndex; i >= 0; i--) { + newSelection [writeIndex++] = availableItems [i]; + } + setSelection (newSelection, false); + setFocusItem (selectedItem, true); + redrawItems (anchorIndex, selectIndex, true); + showItem (selectedItem); + Event newEvent = new Event (); + newEvent.item = selectedItem; + postEvent (SWT.Selection, newEvent); +} +void onKeyDown (Event event) { + if (ignoreKey) { + ignoreKey = false; + return; + } + ignoreKey = true; + notifyListeners (event.type, event); + event.type = SWT.None; + if (!event.doit) return; + if (focusItem == null) return; + if ((event.stateMask & SWT.SHIFT) == 0 && event.keyCode != SWT.SHIFT) { + anchorItem = null; + } + switch (event.keyCode) { + case SWT.ARROW_UP: + onArrowUp (event.stateMask); + return; + case SWT.ARROW_DOWN: + onArrowDown (event.stateMask); + return; + case SWT.ARROW_LEFT: + onArrowLeft (event.stateMask); + return; + case SWT.ARROW_RIGHT: + onArrowRight (event.stateMask); + return; + case SWT.PAGE_UP: + onPageUp (event.stateMask); + return; + case SWT.PAGE_DOWN: + onPageDown (event.stateMask); + return; + case SWT.HOME: + onHome (event.stateMask); + return; + case SWT.END: + onEnd (event.stateMask); + return; + } + if (event.character == ' ') { + onSpace (); + return; + } + if (event.character == SWT.CR) { + onCR (); + return; + } + if ((event.stateMask & SWT.CTRL) != 0) return; + + int initialIndex = focusItem.availableIndex; + char character = Character.toLowerCase (event.character); + /* check available items from current focus item to bottom */ + for (int i = initialIndex + 1; i < availableItemsCount; i++) { + TreeItem item = availableItems [i]; + String text = item.getText (0, false); + if (text.length() > 0) { + if (Character.toLowerCase (text.charAt (0)) == character) { + selectItem (item, false); + setFocusItem (item, true); + redrawItem (i, true); + showItem (item); + Event newEvent = new Event (); + newEvent.item = item; + postEvent (SWT.Selection, newEvent); + return; + } + } + } + /* check available items from top to current focus item */ + for (int i = 0; i < initialIndex; i++) { + TreeItem item = availableItems [i]; + String text = item.getText (0, false); + if (text.length() > 0) { + if (Character.toLowerCase (text.charAt (0)) == character) { + selectItem (item, false); + setFocusItem (item, true); + redrawItem (i, true); + showItem (item); + Event newEvent = new Event (); + newEvent.item = item; + postEvent (SWT.Selection, newEvent); + return; + } + } + } +} +void onMouseDoubleClick (Event event) { + if (!isFocusControl ()) setFocus (); + int index = (event.y - getHeaderHeight ()) / itemHeight + topIndex; + if (!(0 <= index && index < availableItemsCount)) return; /* not on an available item */ + TreeItem selectedItem = availableItems [index]; + + /* + * If the two clicks of the double click did not occur over the same item then do not + * consider this to be a default selection. + */ + if (selectedItem != lastClickedItem) return; + + /* if click was in expander box then don't fire event */ + if (selectedItem.items.length > 0 && selectedItem.getExpanderBounds ().contains (event.x, event.y)) { + return; + } + + if (!selectedItem.getHitBounds ().contains (event.x, event.y)) return; /* considers x */ + + Event newEvent = new Event (); + newEvent.item = selectedItem; + postEvent (SWT.DefaultSelection, newEvent); +} +void onMouseDown (Event event) { + if (!isFocusControl ()) forceFocus (); + int index = (event.y - getHeaderHeight ()) / itemHeight + topIndex; + if (!(0 <= index && index < availableItemsCount)) return; /* not on an available item */ + TreeItem selectedItem = availableItems [index]; + + /* if click was in expander box */ + if (selectedItem.items.length > 0 && selectedItem.getExpanderBounds ().contains (event.x, event.y)) { + if (event.button != 1) return; + boolean expand = !selectedItem.expanded; + selectedItem.setExpanded (expand); + Event newEvent = new Event (); + newEvent.item = selectedItem; + if (expand) { + inExpand = true; + sendEvent (SWT.Expand, newEvent); + inExpand = false; + if (isDisposed ()) return; + if (selectedItem.items.length == 0) { + selectedItem.expanded = false; + } + } else { + sendEvent (SWT.Collapse, newEvent); + } + return; + } + /* if click was in checkbox */ + if ((style & SWT.CHECK) != 0 && selectedItem.getCheckboxBounds ().contains (event.x, event.y)) { + if (event.button != 1) return; + selectedItem.setChecked (!selectedItem.checked); + Event newEvent = new Event (); + newEvent.item = selectedItem; + newEvent.detail = SWT.CHECK; + postEvent (SWT.Selection, newEvent); + return; + } + + if (!selectedItem.getHitBounds ().contains (event.x, event.y)) return; + + if ((event.stateMask & SWT.SHIFT) == 0 && event.keyCode != SWT.SHIFT) anchorItem = null; + + boolean sendSelection = true; + /* Detect when this is the second click of a DefaultSelection and don't fire Selection */ + if (lastSelectionEvent != null && lastSelectionEvent.item == selectedItem) { + if (event.time - lastSelectionEvent.time <= display.getDoubleClickTime ()) { + sendSelection = false; + } else { + lastSelectionEvent = event; + event.item = selectedItem; + } + } else { + lastSelectionEvent = event; + event.item = selectedItem; + } + + if ((style & SWT.SINGLE) != 0) { + if (!selectedItem.isSelected ()) { + if (event.button == 1) { + selectItem (selectedItem, false); + setFocusItem (selectedItem, true); + redrawItem (selectedItem.availableIndex, true); + if (sendSelection) { + Event newEvent = new Event (); + newEvent.item = selectedItem; + postEvent (SWT.Selection, newEvent); + } + return; + } + if ((event.stateMask & (SWT.CTRL | SWT.SHIFT)) == 0) { + selectItem (selectedItem, false); + setFocusItem (selectedItem, true); + redrawItem (selectedItem.availableIndex, true); + if (sendSelection) { + Event newEvent = new Event (); + newEvent.item = selectedItem; + postEvent (SWT.Selection, newEvent); + } + return; + } + } + /* item is selected */ + if (event.button == 1) { + /* fire a selection event, though the selection did not change */ + if (sendSelection) { + Event newEvent = new Event (); + newEvent.item = selectedItem; + postEvent (SWT.Selection, newEvent); + } + return; + } + } + /* SWT.MULTI */ + if (!selectedItem.isSelected ()) { + if (event.button == 1) { + if ((event.stateMask & (SWT.CTRL | SWT.SHIFT)) == SWT.SHIFT) { + if (anchorItem == null) anchorItem = focusItem; + int anchorIndex = anchorItem.availableIndex; + int selectIndex = selectedItem.availableIndex; + TreeItem[] newSelection = new TreeItem [Math.abs (anchorIndex - selectIndex) + 1]; + int step = anchorIndex < selectIndex ? 1 : -1; + int writeIndex = 0; + for (int i = anchorIndex; i != selectIndex; i += step) { + newSelection [writeIndex++] = availableItems [i]; + } + newSelection [writeIndex] = availableItems [selectIndex]; + setSelection (newSelection, false); + setFocusItem (selectedItem, true); + redrawItems ( + Math.min (anchorIndex, selectIndex), + Math.max (anchorIndex, selectIndex), + true); + if (sendSelection) { + Event newEvent = new Event (); + newEvent.item = selectedItem; + postEvent (SWT.Selection, newEvent); + } + return; + } + selectItem (selectedItem, (event.stateMask & SWT.CTRL) != 0); + setFocusItem (selectedItem, true); + redrawItem (selectedItem.availableIndex, true); + if (sendSelection) { + Event newEvent = new Event (); + newEvent.item = selectedItem; + postEvent (SWT.Selection, newEvent); + } + return; + } + /* button 3 */ + if ((event.stateMask & (SWT.CTRL | SWT.SHIFT)) == 0) { + selectItem (selectedItem, false); + setFocusItem (selectedItem, true); + redrawItem (selectedItem.availableIndex, true); + if (sendSelection) { + Event newEvent = new Event (); + newEvent.item = selectedItem; + postEvent (SWT.Selection, newEvent); + } + return; + } + } + /* item is selected */ + if (event.button != 1) return; + if ((event.stateMask & SWT.CTRL) != 0) { + removeSelectedItem (getSelectionIndex (selectedItem)); + setFocusItem (selectedItem, true); + redrawItem (selectedItem.availableIndex, true); + if (sendSelection) { + Event newEvent = new Event (); + newEvent.item = selectedItem; + postEvent (SWT.Selection, newEvent); + } + return; + } + if ((event.stateMask & SWT.SHIFT) != 0) { + if (anchorItem == null) anchorItem = focusItem; + int anchorIndex = anchorItem.availableIndex; + int selectIndex = selectedItem.availableIndex; + TreeItem[] newSelection = new TreeItem [Math.abs (anchorIndex - selectIndex) + 1]; + int step = anchorIndex < selectIndex ? 1 : -1; + int writeIndex = 0; + for (int i = anchorIndex; i != selectIndex; i += step) { + newSelection [writeIndex++] = availableItems [i]; + } + newSelection [writeIndex] = availableItems [selectIndex]; + setSelection (newSelection, false); + setFocusItem (selectedItem, true); + redrawItems ( + Math.min (anchorIndex, selectIndex), + Math.max (anchorIndex, selectIndex), + true); + if (sendSelection) { + Event newEvent = new Event (); + newEvent.item = selectedItem; + postEvent (SWT.Selection, newEvent); + } + return; + } + selectItem (selectedItem, false); + setFocusItem (selectedItem, true); + redrawItem (selectedItem.availableIndex, true); + if (sendSelection) { + Event newEvent = new Event (); + newEvent.item = selectedItem; + postEvent (SWT.Selection, newEvent); + } +} +void onMouseUp (Event event) { + int index = (event.y - getHeaderHeight ()) / itemHeight + topIndex; + if (!(0 <= index && index < availableItemsCount)) return; /* not on an available item */ + lastClickedItem = availableItems [index]; +} +void onPageDown (int stateMask) { + int visibleItemCount = (clientArea.height - getHeaderHeight ()) / itemHeight; + if ((stateMask & (SWT.CTRL | SWT.SHIFT)) == 0) { + /* PageDown with no modifiers */ + int newFocusIndex = focusItem.availableIndex + visibleItemCount - 1; + newFocusIndex = Math.min (newFocusIndex, availableItemsCount - 1); + if (newFocusIndex == focusItem.availableIndex) return; + TreeItem item = availableItems [newFocusIndex]; + selectItem (item, false); + setFocusItem (item, true); + showItem (item); + redrawItem (item.availableIndex, true); + return; + } + if ((stateMask & (SWT.CTRL | SWT.SHIFT)) == (SWT.CTRL | SWT.SHIFT)) { + /* CTRL+Shift+PageDown */ + int newTopIndex = topIndex + visibleItemCount; + newTopIndex = Math.min (newTopIndex, availableItemsCount - visibleItemCount); + if (newTopIndex == topIndex) return; + setTopItem (availableItems [newTopIndex]); + return; + } + if ((style & SWT.SINGLE) != 0) { + if ((stateMask & SWT.SHIFT) != 0) { + /* Shift+PageDown */ + int newFocusIndex = focusItem.availableIndex + visibleItemCount - 1; + newFocusIndex = Math.min (newFocusIndex, availableItemsCount - 1); + if (newFocusIndex == focusItem.availableIndex) return; + TreeItem item = availableItems [newFocusIndex]; + selectItem (item, false); + setFocusItem (item, true); + showItem (item); + redrawItem (item.availableIndex, true); + return; + } + /* CTRL+PageDown */ + int newTopIndex = topIndex + visibleItemCount; + newTopIndex = Math.min (newTopIndex, availableItemsCount - visibleItemCount); + if (newTopIndex == topIndex) return; + setTopItem (availableItems [newTopIndex]); + return; + } + /* SWT.MULTI */ + if ((stateMask & SWT.CTRL) != 0) { + /* CTRL+PageDown */ + int bottomIndex = Math.min (topIndex + visibleItemCount - 1, availableItemsCount - 1); + if (focusItem.availableIndex != bottomIndex) { + /* move focus to bottom item in viewport */ + setFocusItem (availableItems [bottomIndex], true); + redrawItem (bottomIndex, true); + } else { + /* at bottom of viewport, so set focus to bottom item one page down */ + int newFocusIndex = Math.min (availableItemsCount - 1, bottomIndex + visibleItemCount); + if (newFocusIndex == focusItem.availableIndex) return; + setFocusItem (availableItems [newFocusIndex], true); + showItem (availableItems [newFocusIndex]); + redrawItem (newFocusIndex, true); + } + return; + } + /* Shift+PageDown */ + if (anchorItem == null) anchorItem = focusItem; + int anchorIndex = anchorItem.availableIndex; + int bottomIndex = Math.min (topIndex + visibleItemCount - 1, availableItemsCount - 1); + int selectIndex; + if (focusItem.availableIndex != bottomIndex) { + /* select from focus to bottom item in viewport */ + selectIndex = bottomIndex; + } else { + /* already at bottom of viewport, so select to bottom of one page down */ + selectIndex = Math.min (availableItemsCount - 1, bottomIndex + visibleItemCount); + if (selectIndex == focusItem.availableIndex && focusItem.isSelected ()) return; + } + TreeItem selectedItem = availableItems [selectIndex]; + TreeItem[] newSelection = new TreeItem [Math.abs (anchorIndex - selectIndex) + 1]; + int step = anchorIndex < selectIndex ? 1 : -1; + int writeIndex = 0; + for (int i = anchorIndex; i != selectIndex; i += step) { + newSelection [writeIndex++] = availableItems [i]; + } + newSelection [writeIndex] = availableItems [selectIndex]; + setSelection (newSelection, false); + setFocusItem (selectedItem, true); + showItem (selectedItem); + Event newEvent = new Event (); + newEvent.item = selectedItem; + postEvent (SWT.Selection, newEvent); +} +void onPageUp (int stateMask) { + int visibleItemCount = (clientArea.height - getHeaderHeight ()) / itemHeight; + if ((stateMask & (SWT.CTRL | SWT.SHIFT)) == 0) { + /* PageUp with no modifiers */ + int newFocusIndex = Math.max (0, focusItem.availableIndex - visibleItemCount + 1); + if (newFocusIndex == focusItem.availableIndex) return; + TreeItem item = availableItems [newFocusIndex]; + selectItem (item, false); + setFocusItem (item, true); + showItem (item); + redrawItem (item.availableIndex, true); + return; + } + if ((stateMask & (SWT.CTRL | SWT.SHIFT)) == (SWT.CTRL | SWT.SHIFT)) { + /* CTRL+Shift+PageUp */ + int newTopIndex = Math.max (0, topIndex - visibleItemCount); + if (newTopIndex == topIndex) return; + setTopItem (availableItems [newTopIndex]); + return; + } + if ((style & SWT.SINGLE) != 0) { + if ((stateMask & SWT.SHIFT) != 0) { + /* Shift+PageUp */ + int newFocusIndex = Math.max (0, focusItem.availableIndex - visibleItemCount + 1); + if (newFocusIndex == focusItem.availableIndex) return; + TreeItem item = availableItems [newFocusIndex]; + selectItem (item, false); + setFocusItem (item, true); + showItem (item); + redrawItem (item.availableIndex, true); + return; + } + /* CTRL+PageUp */ + int newTopIndex = Math.max (0, topIndex - visibleItemCount); + if (newTopIndex == topIndex) return; + setTopItem (availableItems [newTopIndex]); + return; + } + /* SWT.MULTI */ + if ((stateMask & SWT.CTRL) != 0) { + /* CTRL+PageUp */ + if (focusItem.availableIndex != topIndex) { + /* move focus to top item in viewport */ + setFocusItem (availableItems [topIndex], true); + redrawItem (topIndex, true); + } else { + /* at top of viewport, so set focus to top item one page up */ + int newFocusIndex = Math.max (0, focusItem.availableIndex - visibleItemCount); + if (newFocusIndex == focusItem.availableIndex) return; + setFocusItem (availableItems [newFocusIndex], true); + showItem (availableItems [newFocusIndex]); + redrawItem (newFocusIndex, true); + } + return; + } + /* Shift+PageUp */ + if (anchorItem == null) anchorItem = focusItem; + int anchorIndex = anchorItem.availableIndex; + int selectIndex; + if (focusItem.availableIndex != topIndex) { + /* select from focus to top item in viewport */ + selectIndex = topIndex; + } else { + /* already at top of viewport, so select to top of one page up */ + selectIndex = Math.max (0, topIndex - visibleItemCount); + if (selectIndex == focusItem.availableIndex && focusItem.isSelected ()) return; + } + TreeItem selectedItem = availableItems [selectIndex]; + TreeItem[] newSelection = new TreeItem [Math.abs (anchorIndex - selectIndex) + 1]; + int step = anchorIndex < selectIndex ? 1 : -1; + int writeIndex = 0; + for (int i = anchorIndex; i != selectIndex; i += step) { + newSelection [writeIndex++] = availableItems [i]; + } + newSelection [writeIndex] = availableItems [selectIndex]; + setSelection (newSelection, false); + setFocusItem (selectedItem, true); + showItem (selectedItem); + Event newEvent = new Event (); + newEvent.item = selectedItem; + postEvent (SWT.Selection, newEvent); +} +void onPaint (Event event) { + TreeColumn[] orderedColumns = getOrderedColumns (); + GC gc = event.gc; + Rectangle clipping = gc.getClipping (); + int headerHeight = getHeaderHeight (); + int numColumns = orderedColumns.length; + int startColumn = -1, endColumn = -1; + if (numColumns > 0) { + startColumn = computeColumnIntersect (clipping.x, 0); + if (startColumn != -1) { /* the clip x is within a column's bounds */ + endColumn = computeColumnIntersect (clipping.x + clipping.width, startColumn); + if (endColumn == -1) endColumn = numColumns - 1; + } + } else { + startColumn = endColumn = 0; + } + + /* Determine the items to be painted */ + int startIndex = (clipping.y - headerHeight) / itemHeight + topIndex; + int endIndex = -1; + if (startIndex < availableItemsCount) { + endIndex = startIndex + Compatibility.ceil (clipping.height, itemHeight); + } + startIndex = Math.max (0, startIndex); + endIndex = Math.min (endIndex, availableItemsCount - 1); + + /* fill background not handled by items */ + gc.setBackground (getBackground ()); + gc.setClipping (clipping); + int bottomY = endIndex >= 0 ? getItemY (availableItems [endIndex]) + itemHeight : 0; + int fillHeight = Math.max (0, clientArea.height - bottomY); + if (fillHeight > 0) { /* space below bottom item */ + drawBackground (gc, 0, bottomY, clientArea.width, fillHeight); + } + if (columns.length > 0) { + TreeColumn column = orderedColumns [orderedColumns.length - 1]; /* last column */ + int rightX = column.getX () + column.width; + if (rightX < clientArea.width) { + drawBackground (gc, rightX, 0, clientArea.width - rightX, clientArea.height - fillHeight); + } + } + + /* paint the items */ + boolean noFocusDraw = false; + int[] lineDash = gc.getLineDash (); + int lineWidth = gc.getLineWidth (); + for (int i = startIndex; i <= Math.min (endIndex, availableItemsCount - 1); i++) { + TreeItem item = availableItems [i]; + if (!item.isDisposed ()) { /* ensure that item was not disposed in a callback */ + if (startColumn == -1) { + /* indicates that region to paint is to the right of the last column */ + noFocusDraw = item.paint (gc, null, true) || noFocusDraw; + } else { + if (numColumns == 0) { + noFocusDraw = item.paint (gc, null, false) || noFocusDraw; + } else { + for (int j = startColumn; j <= Math.min (endColumn, columns.length - 1); j++) { + if (!item.isDisposed ()) { /* ensure that item was not disposed in a callback */ + noFocusDraw = item.paint (gc, orderedColumns [j], false) || noFocusDraw; + } + if (isDisposed () || gc.isDisposed ()) return; /* ensure that receiver was not disposed in a callback */ + } + } + } + } + if (isDisposed () || gc.isDisposed ()) return; /* ensure that receiver was not disposed in a callback */ + } + + /* repaint grid lines */ + gc.setClipping(clipping); + gc.setLineWidth (lineWidth); + if (linesVisible) { + gc.setForeground (display.getSystemColor (SWT.COLOR_WIDGET_LIGHT_SHADOW)); + gc.setLineDash (lineDash); + if (numColumns > 0 && startColumn != -1) { + /* vertical column lines */ + for (int i = startColumn; i <= endColumn; i++) { + int x = orderedColumns [i].getX () + orderedColumns [i].width - 1; + gc.drawLine (x, clipping.y, x, clipping.y + clipping.height); + } + } + /* horizontal item lines */ + bottomY = clipping.y + clipping.height; + int rightX = clipping.x + clipping.width; + int y = (clipping.y - headerHeight) / itemHeight * itemHeight + headerHeight; + while (y <= bottomY) { + gc.drawLine (clipping.x, y, rightX, y); + y += itemHeight; + } + } + + /* draw focus rectangle */ + if (!noFocusDraw && isFocusControl ()) { + if (focusItem != null) { + Rectangle focusBounds = focusItem.getFocusBounds (); + if (focusBounds.width > 0) { + gc.setForeground (display.getSystemColor (SWT.COLOR_BLACK)); + gc.setClipping (focusBounds); + if (focusItem.isSelected ()) { + gc.setLineDash (new int[] {2, 2}); + } else { + gc.setLineDash (new int[] {1, 1}); + } + gc.drawFocus (focusBounds.x, focusBounds.y, focusBounds.width, focusBounds.height); + } + } else { + /* no items, so draw focus border around Tree */ + int y = headerHeight + 1; + int width = Math.max (0, clientArea.width - 2); + int height = Math.max (0, clientArea.height - headerHeight - 2); + gc.setForeground (display.getSystemColor (SWT.COLOR_BLACK)); + gc.setClipping (1, y, width, height); + gc.setLineDash (new int[] {1, 1}); + gc.drawFocus (1, y, width, height); + } + } + + /* draw insert mark */ + if (insertMarkItem != null) { + Rectangle focusBounds = insertMarkItem.getFocusBounds (); + gc.setForeground (display.getSystemColor (SWT.COLOR_BLACK)); + gc.setClipping (focusBounds); + gc.setLineDash (lineDash); + if (insertMarkPrecedes) { + gc.drawLine (focusBounds.x, focusBounds.y, focusBounds.x + focusBounds.width, focusBounds.y); + } else { + int y = focusBounds.y + focusBounds.height - 1; + gc.drawLine (focusBounds.x, y, focusBounds.x + focusBounds.width, y); + } + } +} +void onResize (Event event) { + clientArea = getClientArea (); + /* vertical scrollbar */ + ScrollBar vBar = getVerticalBar (); + if (vBar != null) { + int clientHeight = (clientArea.height - getHeaderHeight ()) / itemHeight; + int thumb = Math.min (clientHeight, availableItemsCount); + vBar.setThumb (thumb); + vBar.setPageIncrement (thumb); + int index = vBar.getSelection (); + if (index != topIndex) { + topIndex = index; + redraw (); + } + boolean visible = clientHeight < availableItemsCount; + if (visible != vBar.getVisible ()) { + vBar.setVisible (visible); + clientArea = getClientArea (); + } + } + + /* horizontal scrollbar */ + ScrollBar hBar = getHorizontalBar (); + if (hBar != null) { + int hBarMaximum = hBar.getMaximum (); + int thumb = Math.min (clientArea.width, hBarMaximum); + hBar.setThumb (thumb); + hBar.setPageIncrement (thumb); + horizontalOffset = hBar.getSelection (); + boolean visible = clientArea.width < hBarMaximum; + if (visible != hBar.getVisible ()) { + hBar.setVisible (visible); + clientArea = getClientArea (); + } + } + + /* header */ + int headerHeight = Math.max (fontHeight, headerImageHeight) + 2 * getHeaderPadding (); + header.setSize (clientArea.width, headerHeight); + + /* if this is the focus control but there are no items then the boundary focus ring must be repainted */ + if (availableItemsCount == 0 && isFocusControl ()) redraw (); +} +void onScrollHorizontal (Event event) { + ScrollBar hBar = getHorizontalBar (); + if (hBar == null) return; + int newSelection = hBar.getSelection (); + update (); + if (availableItemsCount > 0) { + GC gc = new GC (this); + gc.copyArea ( + 0, 0, + clientArea.width, clientArea.height, + horizontalOffset - newSelection, 0); + gc.dispose (); + } else { + redraw (); /* ensure that static focus rectangle updates properly */ + } + if (drawCount <= 0 && header.isVisible ()) { + header.update (); + Rectangle headerClientArea = header.getClientArea (); + GC gc = new GC (header); + gc.copyArea ( + 0, 0, + headerClientArea.width, headerClientArea.height, + horizontalOffset - newSelection, 0); + gc.dispose (); + } + horizontalOffset = newSelection; +} +void onScrollVertical (Event event) { + ScrollBar vBar = getVerticalBar (); + if (vBar != null) { + int newSelection = vBar.getSelection (); + update (); + GC gc = new GC (this); + gc.copyArea ( + 0, 0, + clientArea.width, clientArea.height, + 0, (topIndex - newSelection) * itemHeight); + gc.dispose (); + topIndex = newSelection; + } +} +void onSpace () { + if (focusItem == null) return; + if (!focusItem.isSelected ()) { + selectItem (focusItem, (style & SWT.MULTI) != 0); + redrawItem (focusItem.availableIndex, true); + } + if ((style & SWT.CHECK) != 0) { + focusItem.setChecked (!focusItem.checked); + } + showItem (focusItem); + Event event = new Event (); + event.item = focusItem; + postEvent (SWT.Selection, event); + if ((style & SWT.CHECK) == 0) return; + + /* SWT.CHECK */ + event = new Event (); + event.item = focusItem; + event.detail = SWT.CHECK; + postEvent (SWT.Selection, event); +} +/* + * The current focus item is about to become unavailable, so reassign focus. + */ +void reassignFocus () { + if (focusItem == null) return; + + /* reassign to current focus' parent item if it has one */ + if (focusItem.parentItem != null) { + TreeItem item = focusItem.parentItem; + setFocusItem (item, false); + showItem (item); + return; + } + + /* + * reassign to the previous root-level item if there is one, or the next + * root-level item otherwise + */ + int index = focusItem.getIndex (); + if (index != 0) { + index--; + } else { + index++; + } + if (index < items.length) { + TreeItem item = items [index]; + setFocusItem (item, false); + showItem (item); + } else { + setFocusItem (null, false); /* no items left */ + } +} +public void redraw () { + checkWidget (); + if (drawCount <= 0) super.redraw (); +} +public void redraw (int x, int y, int width, int height, boolean all) { + checkWidget (); + if (drawCount <= 0) super.redraw (x, y, width, height, all); +} +/* + * Redraws from the specified index down to the last available item inclusive. Note + * that the redraw bounds do not extend beyond the current last item, so clients + * that reduce the number of available items should use #redrawItems(int,int) instead + * to ensure that redrawing extends down to the previous bottom item boundary. + */ +void redrawFromItemDownwards (int index) { + redrawItems (index, availableItemsCount - 1, false); +} +/* + * Redraws the tree item at the specified index. It is valid for this index to reside + * beyond the last available item. + */ +void redrawItem (int itemIndex, boolean focusBoundsOnly) { + if (itemIndex == -1) return; + if (itemIndex < availableItemsCount && !availableItems [itemIndex].isInViewport ()) return; + redrawItems (itemIndex, itemIndex, focusBoundsOnly); +} +/* + * Redraws the tree between the start and end item indices inclusive. It is valid + * for the end index value to extend beyond the last available item. + */ +void redrawItems (int startIndex, int endIndex, boolean focusBoundsOnly) { + if (drawCount > 0) return; + + int startY = (startIndex - topIndex) * itemHeight + getHeaderHeight (); + int height = (endIndex - startIndex + 1) * itemHeight; + if (focusBoundsOnly) { + boolean custom = hooks (SWT.EraseItem) || hooks (SWT.PaintItem); + if (!custom && columns.length > 0) { + TreeColumn lastColumn; + if ((style & SWT.FULL_SELECTION) != 0) { + TreeColumn[] orderedColumns = getOrderedColumns (); + lastColumn = orderedColumns [orderedColumns.length - 1]; + } else { + lastColumn = columns [0]; + } + int rightX = lastColumn.getX () + lastColumn.getWidth (); + if (rightX <= 0) return; /* focus column(s) not visible */ + } + endIndex = Math.min (endIndex, availableItemsCount - 1); + for (int i = startIndex; i <= endIndex; i++) { + TreeItem item = availableItems [i]; + if (item.isInViewport ()) { + /* if custom painting is being done then repaint the full item */ + if (custom) { + redraw (0, getItemY (item), clientArea.width, itemHeight, false); + } else { + /* repaint the item's focus bounds */ + Rectangle bounds = item.getFocusBounds (); + redraw (bounds.x, startY, bounds.width, height, false); + } + } + } + } else { + redraw (0, startY, clientArea.width, height, false); + } +} +/** + * Removes all of the items from the receiver. + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void removeAll () { + checkWidget (); + if (items.length == 0) return; + setRedraw (false); + + setFocusItem (null, false); + for (int i = 0; i < items.length; i++) { + items [i].dispose (false); + } + items = availableItems = selectedItems = NO_ITEMS; + availableItemsCount = topIndex = 0; + anchorItem = lastClickedItem = insertMarkItem = null; + lastSelectionEvent = null; + inExpand = false; + ScrollBar vBar = getVerticalBar (); + if (vBar != null) { + vBar.setMaximum (1); + vBar.setVisible (false); + } + if (columns.length == 0) { + horizontalOffset = 0; + ScrollBar hBar = getHorizontalBar (); + if (hBar != null) { + hBar.setMaximum (1); + hBar.setVisible (false); + } + } + + setRedraw (true); +} +String removeMnemonics (String string) { + /* removes single ampersands and preserves double-ampersands */ + char [] chars = new char [string.length ()]; + string.getChars (0, chars.length, chars, 0); + int i = 0, j = 0; + for ( ; i < chars.length; i++, j++) { + if (chars[i] == '&') { + if (++i == chars.length) break; + if (chars[i] == '&') { + chars[j++] = chars[i - 1]; + } + } + chars[j] = chars[i]; + } + if (i == j) return string; + return new String (chars, 0, j); +} +void removeSelectedItem (int index) { + TreeItem[] newSelectedItems = new TreeItem [selectedItems.length - 1]; + System.arraycopy (selectedItems, 0, newSelectedItems, 0, index); + System.arraycopy (selectedItems, index + 1, newSelectedItems, index, newSelectedItems.length - index); + selectedItems = newSelectedItems; +} +/** + * Removes the listener from the collection of listeners who will + * be notified when the user changes the receiver's selection. + * + * @param listener the listener which should no longer be notified + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see SelectionListener + * @see #addSelectionListener + */ +public void removeSelectionListener (SelectionListener listener) { + checkWidget (); + if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); + removeListener (SWT.Selection, listener); + removeListener (SWT.DefaultSelection, listener); +} +/** + * Removes the listener from the collection of listeners who will + * be notified when items in the receiver are expanded or collapsed. + * + * @param listener the listener which should no longer be notified + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see TreeListener + * @see #addTreeListener + */ +public void removeTreeListener (TreeListener listener) { + checkWidget (); + if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); + removeListener (SWT.Expand, listener); + removeListener (SWT.Collapse, listener); +} +/** + * Selects an item in the receiver. If the item was already + * selected, it remains selected. + * + * @param item the item to be selected + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the item is null</li> + * <li>ERROR_INVALID_ARGUMENT - if the item has been disposed</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 3.4 + */ +public void select (TreeItem item) { + checkWidget (); + if (item == null) error (SWT.ERROR_NULL_ARGUMENT); + if (item.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT); + selectItem (item, (style & SWT.MULTI) != 0); + redrawItem (item.availableIndex, true); +} +/** + * Selects all of the items in the receiver. + * <p> + * If the receiver is single-select, do nothing. + * </p> + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void selectAll () { + checkWidget (); + if ((style & SWT.SINGLE) != 0) return; + selectedItems = new TreeItem [availableItemsCount]; + System.arraycopy (availableItems, 0, selectedItems, 0, availableItemsCount); + redraw (); +} +void selectItem (TreeItem item, boolean addToSelection) { + TreeItem[] oldSelectedItems = selectedItems; + if (!addToSelection || (style & SWT.SINGLE) != 0) { + selectedItems = new TreeItem[] {item}; + for (int i = 0; i < oldSelectedItems.length; i++) { + if (oldSelectedItems [i] != item) { + redrawItem (oldSelectedItems [i].availableIndex, true); + } + } + } else { + if (item.isSelected ()) return; + selectedItems = new TreeItem [selectedItems.length + 1]; + System.arraycopy (oldSelectedItems, 0, selectedItems, 0, oldSelectedItems.length); + selectedItems [selectedItems.length - 1] = item; + } +} +public void setBackground (Color color) { + checkWidget (); + if (color == null) color = display.getSystemColor (SWT.COLOR_LIST_BACKGROUND); + super.setBackground (color); +} +/** + * Sets the order that the items in the receiver should + * be displayed in to the given argument which is described + * in terms of the zero-relative ordering of when the items + * were added. + * + * @param order the new order to display the items + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the item order is null</li> + * <li>ERROR_INVALID_ARGUMENT - if the item order is not the same length as the number of items</li> + * </ul> + * + * @see Tree#getColumnOrder() + * @see TreeColumn#getMoveable() + * @see TreeColumn#setMoveable(boolean) + * @see SWT#Move + * + * @since 3.2 + */ +public void setColumnOrder (int [] order) { + checkWidget (); + if (order == null) error (SWT.ERROR_NULL_ARGUMENT); + if (columns.length == 0) { + if (order.length != 0) error (SWT.ERROR_INVALID_ARGUMENT); + return; + } + if (order.length != columns.length) error (SWT.ERROR_INVALID_ARGUMENT); + boolean reorder = false; + boolean [] seen = new boolean [columns.length]; + int[] oldOrder = getColumnOrder (); + for (int i = 0; i < order.length; i++) { + int index = order [i]; + if (index < 0 || index >= columns.length) error (SWT.ERROR_INVALID_RANGE); + if (seen [index]) error (SWT.ERROR_INVALID_ARGUMENT); + seen [index] = true; + if (index != oldOrder [i]) reorder = true; + } + if (!reorder) return; + + headerHideToolTip (); + int[] oldX = new int [columns.length]; + for (int i = 0; i < columns.length; i++) { + oldX [i] = columns [i].getX (); + } + orderedColumns = new TreeColumn [order.length]; + for (int i = 0; i < order.length; i++) { + orderedColumns [i] = columns [order [i]]; + } + /* + * If the first ordered column has changed then the old and new ordered column 0's + * have to recompute their display texts since they will now have just gained/lost + * space as a result of the hierarchy decorations that appear in ordered column 0. + */ + if (oldOrder [0] != order [0]) { + orderedCol0imageWidth = columns [order [0]].itemImageWidth; + GC gc = new GC (this); + for (int i = 0; i < items.length; i++) { + items [i].updateColumnWidth (columns [oldOrder [0]], gc); + items [i].updateColumnWidth (columns [order [0]], gc); + } + gc.dispose(); + } + for (int i = 0; i < orderedColumns.length; i++) { + TreeColumn column = orderedColumns [i]; + if (!column.isDisposed () && column.getX () != oldX [column.getIndex ()]) { + column.sendEvent (SWT.Move); + } + } + + redraw (); + if (drawCount <= 0 && header.isVisible ()) header.redraw (); +} +void setFocusItem (TreeItem item, boolean redrawOldFocus) { + if (item == focusItem) return; + TreeItem oldFocusItem = focusItem; + focusItem = item; + if (redrawOldFocus && oldFocusItem != null) { + redrawItem (oldFocusItem.availableIndex, true); + } +} +public void setFont (Font value) { + checkWidget (); + Font oldFont = getFont (); + super.setFont (value); + Font font = getFont (); + if (font.equals (oldFont)) return; + + GC gc = new GC (this); + + /* recompute the receiver's cached font height and item height values */ + fontHeight = gc.getFontMetrics ().getHeight (); + setItemHeight (Math.max (fontHeight, imageHeight) + 2 * getCellPadding ()); + Point headerSize = header.getSize (); + int newHeaderHeight = Math.max (fontHeight, headerImageHeight) + 2 * getHeaderPadding (); + if (headerSize.y != newHeaderHeight) { + header.setSize (headerSize.x, newHeaderHeight); + } + header.setFont (font); + + /* + * Notify all columns and items of the font change so that elements that + * use the receiver's font can recompute their cached string widths. + */ + for (int i = 0; i < columns.length; i++) { + columns [i].updateFont (gc); + } + for (int i = 0; i < items.length; i++) { + items [i].updateFont (gc); + } + + gc.dispose (); + + if (drawCount <= 0 && header.isVisible ()) header.redraw (); + + /* update scrollbars */ + if (columns.length == 0) updateHorizontalBar (); + ScrollBar vBar = getVerticalBar (); + if (vBar != null) { + int thumb = (clientArea.height - getHeaderHeight ()) / itemHeight; + if (vBar.getThumb () != thumb) { + vBar.setThumb (thumb); + vBar.setPageIncrement (thumb); + } + topIndex = vBar.getSelection (); + vBar.setVisible (thumb < vBar.getMaximum ()); + } + redraw (); +} +public void setForeground (Color color) { + checkWidget (); + if (color == null) color = display.getSystemColor (SWT.COLOR_LIST_FOREGROUND); + super.setForeground (color); +} +void setHeaderImageHeight (int value) { + headerImageHeight = value; + Point headerSize = header.getSize (); + int newHeaderHeight = Math.max (fontHeight, headerImageHeight) + 2 * getHeaderPadding (); + if (headerSize.y != newHeaderHeight) { + header.setSize (headerSize.x, newHeaderHeight); + } +} +/** + * Marks the receiver's header as visible if the argument is <code>true</code>, + * and marks it invisible otherwise. + * <p> + * If one of the receiver's ancestors is not visible or some + * other condition makes the receiver not visible, marking + * it visible may not actually cause it to be displayed. + * </p> + * + * @param show the new visibility state + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 3.1 + */ +public void setHeaderVisible (boolean value) { + checkWidget (); + if (header.getVisible () == value) return; /* no change */ + headerHideToolTip (); + header.setVisible (value); + updateVerticalBar (); + redraw (); +} +void setImageHeight (int value) { + imageHeight = value; + setItemHeight (Math.max (fontHeight, imageHeight) + 2 * getCellPadding ()); +} +/** + * Display a mark indicating the point at which an item will be inserted. + * The drop insert item has a visual hint to show where a dragged item + * will be inserted when dropped on the tree. + * + * @param item the insert item. Null will clear the insertion mark. + * @param before true places the insert mark above 'item'. false places + * the insert mark below 'item'. + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_INVALID_ARGUMENT - if the item has been disposed</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + */ +public void setInsertMark (TreeItem item, boolean before) { + checkWidget (); + if (item != null && item.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT); + if (item != null && item.parent != this) return; + if (item == insertMarkItem && before == insertMarkPrecedes) return; /* no change */ + + TreeItem oldInsertItem = insertMarkItem; + insertMarkItem = item; + insertMarkPrecedes = before; + if (oldInsertItem != null && oldInsertItem.availableIndex != -1) { + redrawItem (oldInsertItem.availableIndex, true); + } + if (item != null && item != oldInsertItem && item.availableIndex != -1) { + redrawItem (item.availableIndex, true); + } +} +/** + * Sets the number of root-level items contained in the receiver. + * + * @param count the number of items + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 3.2 + */ +public void setItemCount (int count) { + checkWidget (); + count = Math.max (0, count); + if (count == items.length) return; + int oldCount = availableItemsCount; + int redrawStart, redrawEnd; + + /* if the new item count is less than the current count then remove all excess items from the end */ + if (count < items.length) { + redrawStart = count > 0 ? items [count - 1].availableIndex : 0; + redrawEnd = availableItemsCount - 1; + availableItemsCount = items [count].availableIndex; + for (int i = count; i < items.length; i++) { + items [i].dispose (false); + } + if (count == 0) { + items = Tree.NO_ITEMS; + } else { + TreeItem[] newItems = new TreeItem [count]; + System.arraycopy (items, 0, newItems, 0, count); + items = newItems; + } + + int newSelectedCount = 0; + for (int i = 0; i < selectedItems.length; i++) { + if (!selectedItems [i].isDisposed ()) newSelectedCount++; + } + if (newSelectedCount != selectedItems.length) { + /* one or more selected items have been disposed */ + TreeItem[] newSelectedItems = new TreeItem [newSelectedCount]; + int pos = 0; + for (int i = 0; i < selectedItems.length; i++) { + TreeItem item = selectedItems [i]; + if (!item.isDisposed ()) { + newSelectedItems [pos++] = item; + } + } + selectedItems = newSelectedItems; + } + + if (insertMarkItem != null && insertMarkItem.isDisposed ()) insertMarkItem = null; + if (lastClickedItem != null && lastClickedItem.isDisposed ()) lastClickedItem = null; + if (anchorItem != null && anchorItem.isDisposed ()) anchorItem = null; + if (focusItem != null && focusItem.isDisposed ()) { + TreeItem newFocusItem = count > 0 ? items [count - 1] : null; + setFocusItem (newFocusItem, false); + } + if (columns.length == 0) updateHorizontalBar (); + } else { + int grow = count - items.length; + redrawStart = items.length == 0 ? 0 : items [items.length - 1].availableIndex; + redrawEnd = availableItemsCount + grow - 1; + TreeItem[] newItems = new TreeItem [count]; + System.arraycopy (items, 0, newItems, 0, items.length); + items = newItems; + if (availableItems.length < availableItemsCount + grow) { + TreeItem[] newAvailableItems = new TreeItem [availableItemsCount + grow]; + System.arraycopy (availableItems, 0, newAvailableItems, 0, availableItemsCount); + availableItems = newAvailableItems; + } + for (int i = items.length - grow; i < count; i++) { + TreeItem newItem = new TreeItem (this, SWT.NONE, i, false); + items [i] = newItem; + items [i].availableIndex = availableItemsCount; + availableItems [availableItemsCount++] = newItem; + } + if (oldCount == 0) focusItem = availableItems [0]; + } + + updateVerticalBar (); + /* + * If this is the focus control and the available item count is going from 0->!0 or !0->0 + * then the receiver must be redrawn to ensure that its boundary focus ring is updated. + */ + if ((oldCount == 0 || availableItemsCount == 0) && isFocusControl ()) { + redraw (); + return; + } + redrawItems (redrawStart, redrawEnd, false); +} +boolean setItemHeight (int value) { + boolean update = !customHeightSet || itemHeight < value; + if (update) itemHeight = value; + return update; +} +/** + * Marks the receiver's lines as visible if the argument is <code>true</code>, + * and marks it invisible otherwise. Note that some platforms draw + * grid lines while others may draw alternating row colors. + * <p> + * If one of the receiver's ancestors is not visible or some + * other condition makes the receiver not visible, marking + * it visible may not actually cause it to be displayed. + * </p> + * + * @param show the new visibility state + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 3.1 + */ +public void setLinesVisible (boolean value) { + checkWidget (); + if (linesVisible == value) return; /* no change */ + linesVisible = value; + redraw (); +} +public void setMenu (Menu menu) { + super.setMenu (menu); + header.setMenu (menu); +} +public void setRedraw (boolean value) { + checkWidget(); + if (value) { + if (--drawCount == 0) { + if (availableItems.length - availableItemsCount > 3) { + TreeItem[] newAvailableItems = new TreeItem [availableItemsCount]; + System.arraycopy (availableItems, 0, newAvailableItems, 0, availableItemsCount); + availableItems = newAvailableItems; + } + updateVerticalBar (); + updateHorizontalBar (); + } + } else { + drawCount++; + } + super.setRedraw (value); + header.setRedraw (value); +} +/** + * Sets the receiver's selection to the given item. + * The current selection is cleared before the new item is selected. + * <p> + * If the item is not in the receiver, then it is ignored. + * </p> + * + * @param item the item to select + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the item is null</li> + * <li>ERROR_INVALID_ARGUMENT - if the item has been disposed</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 3.2 + */ +public void setSelection (TreeItem item) { + checkWidget (); + if (item == null) error (SWT.ERROR_NULL_ARGUMENT); + setSelection (new TreeItem [] {item}, true); +} +/** + * Sets the receiver's selection to be the given array of items. + * The current selection is cleared before the new items are selected. + * <p> + * Items that are not in the receiver are ignored. + * If the receiver is single-select and multiple items are specified, + * then all items are ignored. + * </p> + * + * @param items the array of items + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the array of items is null</li> + * <li>ERROR_INVALID_ARGUMENT - if one of the items has been disposed</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see Tree#deselectAll() + */ +public void setSelection (TreeItem[] items) { + checkWidget (); + if (items == null) error (SWT.ERROR_NULL_ARGUMENT); + setSelection (items, true); +} + +void setSelection (TreeItem[] items, boolean updateViewport) { + if (items.length == 0 || ((style & SWT.SINGLE) != 0 && items.length > 1)) { + deselectAll (); + return; + } + TreeItem[] oldSelection = selectedItems; + + /* remove null and duplicate items */ + int index = 0; + selectedItems = new TreeItem [items.length]; /* initially assume all valid items */ + for (int i = 0; i < items.length; i++) { + TreeItem item = items [i]; + if (item != null && item.parent == this && !item.isSelected ()) { + selectedItems [index++] = item; + } + } + if (index != items.length) { + /* an invalid item was provided so resize the array accordingly */ + TreeItem[] temp = new TreeItem [index]; + System.arraycopy (selectedItems, 0, temp, 0, index); + selectedItems = temp; + } + if (selectedItems.length == 0) { /* no valid items */ + deselectAll (); + return; + } + + for (int i = 0; i < oldSelection.length; i++) { + if (!oldSelection [i].isSelected ()) { + int availableIndex = oldSelection [i].availableIndex; + if (availableIndex != -1) { + redrawItem (availableIndex, true); + } + } + } + if (updateViewport) { + showItem (selectedItems [0]); + setFocusItem (selectedItems [0], true); + } + for (int i = 0; i < selectedItems.length; i++) { + int availableIndex = selectedItems [i].availableIndex; + if (availableIndex != -1) { + redrawItem (availableIndex, true); + } + } +} +/** + * Sets the column used by the sort indicator for the receiver. A null + * value will clear the sort indicator. The current sort column is cleared + * before the new column is set. + * + * @param column the column used by the sort indicator or <code>null</code> + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_INVALID_ARGUMENT - if the column is disposed</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 3.2 + */ +public void setSortColumn (TreeColumn column) { + checkWidget (); + if (column != null && column.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT); + if (column == sortColumn) return; + if (sortColumn != null && !sortColumn.isDisposed ()) { + sortColumn.setSortDirection (SWT.NONE); + } + sortColumn = column; + if (sortColumn != null) { + sortColumn.setSortDirection (sortDirection); + } +} +/** + * Sets the direction of the sort indicator for the receiver. The value + * can be one of <code>UP</code>, <code>DOWN</code> or <code>NONE</code>. + * + * @param direction the direction of the sort indicator + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 3.2 + */ +public void setSortDirection (int direction) { + checkWidget (); + if (direction != SWT.UP && direction != SWT.DOWN && direction != SWT.NONE) return; + sortDirection = direction; + if (sortColumn == null || sortColumn.isDisposed ()) return; + sortColumn.setSortDirection (sortDirection); +} +/** + * Sets the item which is currently at the top of the receiver. + * This item can change when items are expanded, collapsed, scrolled + * or new items are added or removed. + * + * @param item the item to be shown + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the item is null</li> + * <li>ERROR_INVALID_ARGUMENT - if the item has been disposed</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see Tree#getTopItem() + * + * @since 2.1 + */ +public void setTopItem (TreeItem item) { + checkWidget (); + if (item == null) error (SWT.ERROR_NULL_ARGUMENT); + if (item.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT); + if (item.parent != this) return; + + /* item must be available */ + if (!item.isAvailable ()) item.parentItem.expandAncestors (); + + int visibleItemCount = (clientArea.height - getHeaderHeight ()) / itemHeight; + if (availableItemsCount < visibleItemCount) return; + int index = Math.min (item.availableIndex, availableItemsCount - visibleItemCount); + if (topIndex == index) return; + + update (); + int change = topIndex - index; + topIndex = index; + ScrollBar vBar = getVerticalBar (); + if (vBar != null) vBar.setSelection (topIndex); + if (drawCount <= 0) { + GC gc = new GC (this); + gc.copyArea (0, 0, clientArea.width, clientArea.height, 0, change * itemHeight); + gc.dispose (); + } +} +/** + * Shows the column. If the column is already showing in the receiver, + * this method simply returns. Otherwise, the columns are scrolled until + * the column is visible. + * + * @param column the column to be shown + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the item is null</li> + * <li>ERROR_INVALID_ARGUMENT - if the item has been disposed</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @since 3.1 + */ +public void showColumn (TreeColumn column) { + checkWidget (); + if (column == null) error (SWT.ERROR_NULL_ARGUMENT); + if (column.isDisposed ()) error(SWT.ERROR_INVALID_ARGUMENT); + if (column.parent != this) return; + + int x = column.getX (); + int rightX = x + column.width; + if (0 <= x && rightX <= clientArea.width) return; /* column is fully visible */ + + headerHideToolTip (); + int absX = 0; /* the X of the column irrespective of the horizontal scroll */ + TreeColumn[] orderedColumns = getOrderedColumns (); + for (int i = 0; i < column.getOrderIndex (); i++) { + absX += orderedColumns [i].width; + } + if (x < clientArea.x) { /* column is to left of viewport */ + horizontalOffset = absX; + } else { + horizontalOffset = absX + column.width - clientArea.width; + } + ScrollBar hBar = getHorizontalBar (); + if (hBar != null) hBar.setSelection (horizontalOffset); + redraw (); + if (drawCount <= 0 && header.isVisible ()) header.redraw (); +} +/** + * Shows the item. If the item is already showing in the receiver, + * this method simply returns. Otherwise, the items are scrolled + * and expanded until the item is visible. + * + * @param item the item to be shown + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the item is null</li> + * <li>ERROR_INVALID_ARGUMENT - if the item has been disposed</li> + * </ul> + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see Tree#showSelection() + */ +public void showItem (TreeItem item) { + checkWidget (); + if (item == null) error (SWT.ERROR_NULL_ARGUMENT); + if (item.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT); + if (item.parent != this) return; + + /* item must be available */ + if (!item.isAvailable ()) item.parentItem.expandAncestors (); + + int index = item.availableIndex; + int visibleItemCount = (clientArea.height - getHeaderHeight ()) / itemHeight; + /* nothing to do if item is already in viewport */ + if (topIndex <= index && index < topIndex + visibleItemCount) return; + + if (index <= topIndex) { + /* item is above current viewport, so show on top */ + setTopItem (item); + } else { + /* item is below current viewport, so show on bottom */ + visibleItemCount = Math.max (visibleItemCount, 1); /* item to show should be top item */ + setTopItem (availableItems [Math.min (index - visibleItemCount + 1, availableItemsCount - 1)]); + } +} +/** + * Shows the selection. If the selection is already showing in the receiver, + * this method simply returns. Otherwise, the items are scrolled until + * the selection is visible. + * + * @exception SWTException <ul> + * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> + * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> + * </ul> + * + * @see Tree#showItem(TreeItem) + */ +public void showSelection () { + checkWidget (); + if (selectedItems.length == 0) return; + showItem (selectedItems [0]); +} +void updateColumnWidth (TreeColumn column, int width) { + headerHideToolTip (); + int oldWidth = column.width; + int columnX = column.getX (); + int x = columnX + oldWidth - 1; /* -1 ensures that grid line is included */ + + update (); + GC gc = new GC (this); + gc.copyArea (x, 0, clientArea.width - x, clientArea.height, columnX + width - 1, 0); /* dest x -1 offsets x's -1 above */ + if (width > oldWidth) { + /* column width grew */ + int change = width - oldWidth + 1; /* +1 offsets x's -1 above */ + /* -1/+1 below ensure that right bound of selection redraws correctly in column */ + redraw (x - 1, 0, change + 1, clientArea.height, false); + } else { + int change = oldWidth - width + 1; /* +1 offsets x's -1 above */ + redraw (clientArea.width - change, 0, change, clientArea.height, false); + } + /* the focus box must be repainted because its stipple may become shifted as a result of its new width */ + if (focusItem != null) redrawItem (focusItem.availableIndex, true); + + GC headerGC = new GC (header); + if (drawCount <= 0 && header.getVisible ()) { + Rectangle headerBounds = header.getClientArea (); + header.update (); + x -= 1; /* -1 ensures that full header column separator is included */ + headerGC.copyArea (x, 0, headerBounds.width - x, headerBounds.height, columnX + width - 2, 0); /* dest x -2 offsets x's -1s above */ + if (width > oldWidth) { + /* column width grew */ + int change = width - oldWidth + 2; /* +2 offsets x's -1s above */ + header.redraw (x, 0, change, headerBounds.height, false); + } else { + int change = oldWidth - width + 2; /* +2 offsets x's -1s above */ + header.redraw (headerBounds.width - change, 0, change, headerBounds.height, false); + } + } + + column.width = width; + + /* + * Notify column and all items of column width change so that display labels + * can be recomputed if needed. + */ + column.updateWidth (headerGC); + headerGC.dispose (); + for (int i = 0; i < items.length; i++) { + items [i].updateColumnWidth (column, gc); + } + gc.dispose (); + + int maximum = 0; + for (int i = 0; i < columns.length; i++) { + maximum += columns [i].width; + } + ScrollBar hBar = getHorizontalBar (); + if (hBar != null) { + hBar.setMaximum (Math.max (1, maximum)); /* setting a value of 0 here is ignored */ + if (hBar.getThumb () != clientArea.width) { + hBar.setThumb (clientArea.width); + hBar.setPageIncrement (clientArea.width); + } + int oldHorizontalOffset = horizontalOffset; /* hBar.setVisible() can modify horizontalOffset */ + hBar.setVisible (clientArea.width < maximum); + int selection = hBar.getSelection (); + if (selection != oldHorizontalOffset) { + horizontalOffset = selection; + redraw (); + if (drawCount <= 0 && header.getVisible ()) header.redraw (); + } + } + + column.sendEvent (SWT.Resize); + TreeColumn[] orderedColumns = getOrderedColumns (); + for (int i = column.getOrderIndex () + 1; i < orderedColumns.length; i++) { + if (!orderedColumns [i].isDisposed ()) { + orderedColumns [i].sendEvent (SWT.Move); + } + } + + if (availableItemsCount == 0) redraw (); /* ensure that static focus rectangle updates properly */ +} +/* + * This is a naive implementation that computes the value from scratch. + */ +void updateHorizontalBar () { + if (drawCount > 0) return; + ScrollBar hBar = getHorizontalBar (); + if (hBar == null) return; + + int maxX = 0; + if (columns.length > 0) { + for (int i = 0; i < columns.length; i++) { + maxX += columns [i].width; + } + } else { + for (int i = 0; i < availableItemsCount; i++) { + Rectangle itemBounds = availableItems [i].getCellBounds (0); + maxX = Math.max (maxX, itemBounds.x + itemBounds.width + horizontalOffset); + } + } + + int clientWidth = clientArea.width; + if (maxX != hBar.getMaximum ()) { + hBar.setMaximum (Math.max (1, maxX)); /* setting a value of 0 here is ignored */ + } + int thumb = Math.min (clientWidth, maxX); + if (thumb != hBar.getThumb ()) { + hBar.setThumb (thumb); + hBar.setPageIncrement (thumb); + } + hBar.setVisible (clientWidth < maxX); + + /* reclaim any space now left on the right */ + if (maxX < horizontalOffset + thumb) { + horizontalOffset = maxX - thumb; + hBar.setSelection (horizontalOffset); + redraw (); + } else { + int selection = hBar.getSelection (); + if (selection != horizontalOffset) { + horizontalOffset = selection; + redraw (); + } + } +} +/* + * Update the horizontal bar, if needed, in response to an item change (eg.- created, + * disposed, expanded, etc.). newRightX is the new rightmost X value of the item, + * and rightXchange is the change that led to the item's rightmost X value becoming + * newRightX (so oldRightX + rightXchange = newRightX) + */ +void updateHorizontalBar (int newRightX, int rightXchange) { + if (drawCount > 0) return; + ScrollBar hBar = getHorizontalBar (); + if (hBar == null) return; + + newRightX += horizontalOffset; + int barMaximum = hBar.getMaximum (); + if (newRightX > barMaximum) { /* item has extended beyond previous maximum */ + hBar.setMaximum (newRightX); + int clientAreaWidth = clientArea.width; + int thumb = Math.min (newRightX, clientAreaWidth); + if (hBar.getThumb () != thumb) { + hBar.setThumb (thumb); + hBar.setPageIncrement (thumb); + } + hBar.setVisible (clientAreaWidth <= newRightX); + return; + } + + int previousRightX = newRightX - rightXchange; + if (previousRightX != barMaximum) { + /* this was not the rightmost item, so just check for client width change */ + int clientAreaWidth = clientArea.width; + int thumb = Math.min (barMaximum, clientAreaWidth); + if (hBar.getThumb () != thumb) { + hBar.setThumb (thumb); + hBar.setPageIncrement (thumb); + } + hBar.setVisible (clientAreaWidth <= barMaximum); + return; + } + updateHorizontalBar (); /* must search for the new rightmost item */ +} +void updateVerticalBar () { + if (drawCount > 0) return; + ScrollBar vBar = getVerticalBar (); + if (vBar == null) return; + + int pageSize = (clientArea.height - getHeaderHeight ()) / itemHeight; + int maximum = Math.max (1, availableItemsCount); + if (maximum != vBar.getMaximum ()) { + vBar.setMaximum (maximum); + } + int thumb = Math.min (pageSize, maximum); + if (thumb != vBar.getThumb ()) { + vBar.setThumb (thumb); + vBar.setPageIncrement (thumb); + } + vBar.setVisible (pageSize < maximum); + + /* reclaim any space now left on the bottom */ + if (maximum < topIndex + thumb) { + topIndex = maximum - thumb; + vBar.setSelection (topIndex); + redraw (); + } else { + int selection = vBar.getSelection (); + if (selection != topIndex) { + topIndex = selection; + redraw (); + } + } +} +} |