1 files changed, 391 insertions, 0 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/emulated/expand/org/eclipse/swt/widgets/ExpandItem.java b/bundles/org.eclipse.swt/Eclipse SWT/emulated/expand/org/eclipse/swt/widgets/ExpandItem.java
new file mode 100644
index 0000000000..a8fca05283
--- /dev/null
+++ b/bundles/org.eclipse.swt/Eclipse SWT/emulated/expand/org/eclipse/swt/widgets/ExpandItem.java
@@ -0,0 +1,391 @@
+/*******************************************************************************
+ * 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.graphics.*;
+
+/**
+ * Instances of this class represent a selectable user interface object
+ * that represents a expandable item in a expand bar.
+ * <p>
+ * <dl>
+ * <dt><b>Styles:</b></dt>
+ * <dd>(none)</dd>
+ * <dt><b>Events:</b></dt>
+ * <dd>(none)</dd>
+ * </dl>
+ * </p><p>
+ * IMPORTANT: This class is <em>not</em> intended to be subclassed.
+ * </p>
+ * 
+ * @see ExpandBar
+ * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
+ * 
+ * @since 3.2
+ * @noextend This class is not intended to be subclassed by clients.
+ */
+public class ExpandItem extends Item {
+	ExpandBar parent;
+	Control control;
+	boolean expanded;
+	int x, y, width, height;
+	int imageHeight, imageWidth;
+	static final int TEXT_INSET = 6;
+	static final int BORDER = 1;
+	static final int CHEVRON_SIZE = 24;
+
+/**
+ * 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 Widget#checkSubclass
+ * @see Widget#getStyle
+ */
+public ExpandItem (ExpandBar parent, int style) {
+	this (parent, style, checkNull (parent).getItemCount ());
+}
+
+/**
+ * Constructs a new instance of this class given its parent, a
+ * style value describing its behavior and appearance, and the index
+ * at which to place it in the items maintained by its parent.
+ * <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
+ * @param index the zero-relative index to store the receiver in its parent
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
+ *    <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the parent (inclusive)</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 Widget#checkSubclass
+ * @see Widget#getStyle
+ */
+public ExpandItem (ExpandBar parent, int style, int index) {
+	super (parent, style);
+	this.parent = parent;
+	parent.createItem (this, style, index);
+}
+
+static ExpandBar checkNull (ExpandBar control) {
+	if (control == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
+	return control;	
+}
+
+public void dispose () {
+	if (isDisposed ()) return;
+	//if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
+	parent.destroyItem (this);
+	super.dispose();
+	parent = null;
+	control = null;
+}
+
+void drawChevron (GC gc, int x, int y) {
+	int [] polyline1, polyline2;
+	if (expanded) {
+		int px = x + 4 + 5;
+		int py = y + 4 + 7;
+		polyline1 = new int [] {
+				px,py, px+1,py, px+1,py-1, px+2,py-1, px+2,py-2, px+3,py-2, px+3,py-3,
+				px+3,py-2, px+4,py-2, px+4,py-1, px+5,py-1, px+5,py, px+6,py};
+		py += 4;
+		polyline2 = new int [] {
+				px,py, px+1,py, px+1,py-1, px+2,py-1, px+2,py-2, px+3,py-2, px+3,py-3,
+				px+3,py-2, px+4,py-2, px+4,py-1,  px+5,py-1, px+5,py, px+6,py};
+	} else {
+		int px = x + 4 + 5;
+		int py = y + 4 + 4;
+		polyline1 = new int[] {
+				px,py, px+1,py, px+1,py+1, px+2,py+1, px+2,py+2, px+3,py+2, px+3,py+3,
+				px+3,py+2, px+4,py+2, px+4,py+1,  px+5,py+1, px+5,py, px+6,py};
+		py += 4;
+		polyline2 = new int [] {
+				px,py, px+1,py, px+1,py+1, px+2,py+1, px+2,py+2, px+3,py+2, px+3,py+3,
+				px+3,py+2, px+4,py+2, px+4,py+1,  px+5,py+1, px+5,py, px+6,py};
+	}
+	gc.setForeground (display.getSystemColor (SWT.COLOR_TITLE_FOREGROUND));
+	gc.drawPolyline (polyline1);
+	gc.drawPolyline (polyline2);
+}
+
+void drawItem (GC gc, boolean drawFocus) {
+	int headerHeight = parent.getBandHeight ();
+	Display display = getDisplay ();
+	gc.setForeground (display.getSystemColor (SWT.COLOR_TITLE_BACKGROUND));
+	gc.setBackground (display.getSystemColor (SWT.COLOR_TITLE_BACKGROUND_GRADIENT));
+	gc.fillGradientRectangle (x, y, width, headerHeight, true);
+	if (expanded) {
+		gc.setForeground (display.getSystemColor (SWT.COLOR_TITLE_BACKGROUND_GRADIENT));
+		gc.drawLine (x, y + headerHeight, x, y + headerHeight + height - 1);
+		gc.drawLine (x, y + headerHeight + height - 1, x + width - 1, y + headerHeight + height - 1);
+		gc.drawLine (x + width - 1, y + headerHeight + height - 1, x + width - 1, y + headerHeight);
+	}
+	int drawX = x;
+	if (image != null) {
+		drawX += ExpandItem.TEXT_INSET;
+		if (imageHeight > headerHeight) {
+			gc.drawImage (image, drawX, y + headerHeight - imageHeight);
+		} else {
+			gc.drawImage (image, drawX, y + (headerHeight - imageHeight) / 2);
+		}
+		drawX += imageWidth;
+	}
+	if (text.length() > 0) {
+		drawX += ExpandItem.TEXT_INSET;
+		Point size = gc.stringExtent (text);
+		gc.setForeground (parent.getForeground ());
+		gc.drawString (text, drawX, y + (headerHeight - size.y) / 2, true);
+	}
+	int chevronSize = ExpandItem.CHEVRON_SIZE;
+	drawChevron (gc, x + width - chevronSize, y + (headerHeight - chevronSize) / 2);
+	if (drawFocus) {
+		gc.drawFocus (x + 1, y + 1, width - 2, headerHeight - 2);
+	}
+}
+
+/**
+ * Returns the control that is shown when the item is expanded.
+ * If no control has been set, return <code>null</code>.
+ *
+ * @return the control
+ *
+ * @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 Control getControl() {
+	checkWidget ();
+	return control;
+}
+
+/**
+ * Returns <code>true</code> if the receiver is expanded,
+ * and false otherwise.
+ *
+ * @return the expanded 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>
+ */
+public boolean getExpanded() {
+	checkWidget ();
+	return expanded;
+}
+
+/**
+ * Returns the height of the receiver's header 
+ *
+ * @return the height of the header 
+ *
+ * @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 getHeaderHeight () {
+	checkWidget ();
+	return Math.max (parent.getBandHeight (), imageHeight);
+}
+
+/**
+ * Gets the height of the receiver.
+ *
+ * @return the height
+ *
+ * @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 getHeight () {
+	checkWidget ();
+	return height;
+}
+
+/**
+ * Returns the receiver's parent, which must be a <code>ExpandBar</code>.
+ *
+ * @return the receiver's parent
+ *
+ * @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 ExpandBar getParent () {
+	checkWidget ();
+	return parent;
+}
+
+int getPreferredWidth (GC gc) {
+	int width = ExpandItem.TEXT_INSET * 2 + ExpandItem.CHEVRON_SIZE;
+	if (image != null) {
+		width += ExpandItem.TEXT_INSET + imageWidth;
+	}
+	if (text.length() > 0) {
+		width += gc.stringExtent (text).x;
+	}
+	return width;
+}
+
+void redraw () {
+	int headerHeight = parent.getBandHeight ();
+	if (imageHeight > headerHeight) {
+		parent.redraw (x + ExpandItem.TEXT_INSET, y + headerHeight - imageHeight, imageWidth, imageHeight, false);
+	}
+	parent.redraw (x, y, width, headerHeight + height, false);
+}
+
+void setBounds (int x, int y, int width, int height, boolean move, boolean size) {
+	redraw ();
+	int headerHeight = parent.getBandHeight ();
+	if (move) {
+		if (imageHeight > headerHeight) {
+			y += (imageHeight - headerHeight);
+		}
+		this.x = x;
+		this.y = y;
+		redraw ();
+	}
+	if (size) {
+		this.width = width;
+		this.height = height;
+		redraw ();
+	}
+	if (control != null && !control.isDisposed ()) {
+		if (move) control.setLocation (x + BORDER, y + headerHeight);
+		if (size) control.setSize (Math.max (0, width - 2 * BORDER), Math.max (0, height - BORDER));
+	}
+}
+
+/**
+ * Sets the control that is shown when the item is expanded.
+ *
+ * @param control the new control (or null)
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_ARGUMENT - if the control has been disposed</li> 
+ *    <li>ERROR_INVALID_PARENT - if the control is not in the same widget tree</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 setControl(Control control) {
+	checkWidget ();
+	if (control != null) {
+		if (control.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
+		if (control.parent != parent) error (SWT.ERROR_INVALID_PARENT);
+	}
+	this.control = control;
+	if (control != null) {
+		control.setVisible (expanded);
+		int headerHeight = parent.getBandHeight ();
+		control.setBounds (x + BORDER, y + headerHeight, Math.max (0, width - 2 * BORDER), Math.max (0, height - BORDER));
+	}
+}
+
+/**
+ * Sets the expanded state of the receiver.
+ *
+ * @param expanded the new expanded 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>
+ */
+public void setExpanded (boolean expanded) {
+	checkWidget ();
+	this.expanded = expanded;
+	parent.showItem (this);
+}
+
+public void setImage (Image image) {
+	super.setImage (image);
+	int oldImageHeight = imageHeight;
+	if (image != null) {
+		Rectangle bounds = image.getBounds ();
+		imageHeight = bounds.height;
+		imageWidth = bounds.width;
+	} else {
+		imageHeight = imageWidth = 0;
+	}
+	if (oldImageHeight != imageHeight) {
+		parent.layoutItems (parent.indexOf (this), true);
+	} else {
+		redraw ();
+	}
+}
+
+/**
+ * Sets the height of the receiver. This is height of the item when it is expanded, 
+ * excluding the height of the header.
+ *
+ * @param height the new height
+ *
+ * @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 setHeight (int height) {
+	checkWidget ();
+	if (height < 0) return;
+	setBounds (0, 0, width, height, false, true);
+	if (expanded) parent.layoutItems (parent.indexOf (this) + 1, true);
+}
+
+public void setText (String string) {
+	super.setText (string);
+	redraw ();
+}
+}