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Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Slider.java')
-rwxr-xr-xbundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Slider.java734
1 files changed, 734 insertions, 0 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Slider.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Slider.java
new file mode 100755
index 0000000000..f072cc0eeb
--- /dev/null
+++ b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Slider.java
@@ -0,0 +1,734 @@
+package org.eclipse.swt.widgets;
+
+/*
+ * Licensed Materials - Property of IBM,
+ * (c) Copyright IBM Corp. 1998, 2001 All Rights Reserved
+ */
+
+import org.eclipse.swt.internal.*;
+import org.eclipse.swt.internal.win32.*;
+import org.eclipse.swt.*;
+import org.eclipse.swt.graphics.*;
+import org.eclipse.swt.events.*;
+
+/**
+ * Instances of this class are selectable user interface
+ * objects that represent a range of positive, numeric values.
+ * <p>
+ * At any given moment, a given slider will have a
+ * single <em>selection</em> that is considered to be its
+ * value, which is constrained to be within the range of
+ * values the slider represents (that is, between its
+ * <em>minimum</em> and <em>maximum</em> values).
+ * </p><p>
+ * Typically, sliders will be made up of five areas:
+ * <ol>
+ * <li>an arrow button for decrementing the value</li>
+ * <li>a page decrement area for decrementing the value by a larger amount</li>
+ * <li>a <em>thumb</em> for modifying the value by mouse dragging</li>
+ * <li>a page increment area for incrementing the value by a larger amount</li>
+ * <li>an arrow button for incrementing the value</li>
+ * </ol>
+ * Based on their style, sliders are either <code>HORIZONTAL</code>
+ * (which have left and right facing buttons for incrementing and
+ * decrementing the value) or <code>VERTICAL</code> (which have
+ * up and down facing buttons for incrementing and decrementing
+ * the value).
+ * </p><p>
+ * On some platforms, the size of the slider's thumb can be
+ * varied relative to the magnitude of the range of values it
+ * represents (that is, relative to the difference between its
+ * maximum and minimum values). Typically, this is used to
+ * indicate some proportional value such as the ratio of the
+ * visible area of a document to the total amount of space that
+ * it would take to display it. SWT supports setting the thumb
+ * size even if the underlying platform does not, but in this
+ * case the appearance of the slider will not change.
+ * </p>
+ * <dl>
+ * <dt><b>Styles:</b></dt>
+ * <dd>HORIZONTAL, VERTICAL</dd>
+ * <dt><b>Events:</b></dt>
+ * <dd>Selection</dd>
+ * </dl>
+ * <p>
+ * IMPORTANT: This class is <em>not</em> intended to be subclassed.
+ *
+ * @see Scrollbar
+ */
+
+public class Slider extends Control {
+ int increment, pageIncrement;
+ static final int ScrollBarProc;
+ static final byte [] ScrollBarClass = Converter.wcsToMbcs (0, "SCROLLBAR\0", false);
+ static {
+ WNDCLASSEX lpWndClass = new WNDCLASSEX ();
+ lpWndClass.cbSize = WNDCLASSEX.sizeof;
+ OS.GetClassInfoEx (0, ScrollBarClass, lpWndClass);
+ ScrollBarProc = lpWndClass.lpfnWndProc;
+ }
+
+public Slider (Composite parent, int style) {
+ super (parent, checkStyle (style));
+}
+
+/**
+ * Adds the listener to the collection of listeners who will
+ * be notified when the receiver's value changes, by sending
+ * it one of the messages defined in the <code>SelectionListener</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 SelectionListener
+ * @see #removeSelectionListener
+ */
+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);
+}
+
+int callWindowProc (int msg, int wParam, int lParam) {
+ if (handle == 0) return 0;
+ return OS.CallWindowProc (ScrollBarProc, handle, msg, wParam, lParam);
+}
+
+static int checkStyle (int style) {
+ return checkBits (style, SWT.HORIZONTAL, SWT.VERTICAL, 0, 0, 0, 0);
+}
+
+public Point computeSize (int wHint, int hHint, boolean changed) {
+ checkWidget ();
+ int border = getBorderWidth ();
+ int width = border * 2, height = border * 2;
+ if ((style & SWT.HORIZONTAL) != 0) {
+ width += OS.GetSystemMetrics (OS.SM_CXHSCROLL) * 10;
+ height += OS.GetSystemMetrics (OS.SM_CYHSCROLL);
+ } else {
+ width += OS.GetSystemMetrics (OS.SM_CXVSCROLL);
+ height += OS.GetSystemMetrics (OS.SM_CYVSCROLL) * 10;
+ }
+ if (wHint != SWT.DEFAULT) width = wHint + (border * 2);
+ if (hHint != SWT.DEFAULT) height = hHint + (border * 2);
+ return new Point (width, height);
+}
+
+void createWidget () {
+ super.createWidget ();
+ increment = 1;
+ pageIncrement = 10;
+ SCROLLINFO info = new SCROLLINFO ();
+ info.cbSize = SCROLLINFO.sizeof;
+ info.fMask = OS.SIF_ALL;
+ info.nMax = 100;
+ info.nPage = pageIncrement + 1;
+ OS.SetScrollInfo (handle, OS.SB_CTL, info, true);
+}
+
+int defaultBackground () {
+ return OS.GetSysColor (OS.COLOR_SCROLLBAR);
+}
+
+int defaultForeground () {
+ return OS.GetSysColor (OS.COLOR_BTNFACE);
+}
+
+public boolean getEnabled () {
+ checkWidget ();
+ return (state & DISABLED) == 0;
+}
+
+/**
+ * Returns the amount that the receiver's value will be
+ * modified by when the up/down (or right/left) arrows
+ * are pressed.
+ *
+ * @return the increment
+ *
+ * @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 getIncrement () {
+ checkWidget ();
+ return increment;
+}
+
+/**
+ * Returns the maximum value which the receiver will allow.
+ *
+ * @return the maximum
+ *
+ * @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 getMaximum () {
+ checkWidget ();
+ SCROLLINFO info = new SCROLLINFO ();
+ info.cbSize = SCROLLINFO.sizeof;
+ info.fMask = OS.SIF_RANGE;
+ OS.GetScrollInfo (handle, OS.SB_CTL, info);
+ return info.nMax;
+}
+
+/**
+ * Returns the minimum value which the receiver will allow.
+ *
+ * @return the minimum
+ *
+ * @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 getMinimum () {
+ checkWidget ();
+ SCROLLINFO info = new SCROLLINFO ();
+ info.cbSize = SCROLLINFO.sizeof;
+ info.fMask = OS.SIF_RANGE;
+ OS.GetScrollInfo (handle, OS.SB_CTL, info);
+ return info.nMin;
+}
+
+/**
+ * Returns the amount that the receiver's value will be
+ * modified by when the page increment/decrement areas
+ * are selected.
+ *
+ * @return the page increment
+ *
+ * @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 getPageIncrement () {
+ checkWidget ();
+ return pageIncrement;
+}
+
+/**
+ * Returns the single <em>selection</em> that is the receiver's value.
+ *
+ * @return 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 int getSelection () {
+ checkWidget ();
+ SCROLLINFO info = new SCROLLINFO ();
+ info.cbSize = SCROLLINFO.sizeof;
+ info.fMask = OS.SIF_POS;
+ OS.GetScrollInfo (handle, OS.SB_CTL, info);
+ return info.nPos;
+}
+
+/**
+ * Answers the size of the receiver's thumb relative to the
+ * difference between its maximum and minimum values.
+ *
+ * @return the thumb value
+ *
+ * @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 Slider
+ */
+public int getThumb () {
+ checkWidget ();
+ SCROLLINFO info = new SCROLLINFO ();
+ info.cbSize = SCROLLINFO.sizeof;
+ info.fMask = OS.SIF_PAGE;
+ OS.GetScrollInfo (handle, OS.SB_CTL, info);
+ if (info.nPage != 0) --info.nPage;
+ return info.nPage;
+}
+
+/**
+ * Removes the listener from the collection of listeners who will
+ * be notified when the receiver's value changes.
+ *
+ * @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);
+ if (eventTable == null) return;
+ eventTable.unhook (SWT.Selection, listener);
+ eventTable.unhook (SWT.DefaultSelection,listener);
+}
+
+void setBounds (int x, int y, int width, int height, int flags) {
+ super.setBounds (x, y, width, height, flags);
+ /*
+ * Bug in Windows. If the scroll bar is resized when it has focus,
+ * the flashing cursor that is used to show that the scroll bar has
+ * focus is not moved. The fix is to post a fake WM_SETFOCUS to
+ * get the scroll bar to recompute the size of the flashing cursor.
+ */
+ if (OS.GetFocus () == handle) {
+ OS.PostMessage (handle, OS.WM_SETFOCUS, 0, 0);
+ }
+}
+
+public void setEnabled (boolean enabled) {
+ checkWidget ();
+ int flags = OS.ESB_DISABLE_BOTH;
+ if (enabled) flags = OS.ESB_ENABLE_BOTH;
+ OS.EnableScrollBar (handle, OS.SB_CTL, flags);
+ state &= ~DISABLED;
+ if (!enabled) state |= DISABLED;
+}
+
+/**
+ * Sets the amount that the receiver's value will be
+ * modified by when the up/down (or right/left) arrows
+ * are pressed to the argument, which must be at least
+ * one.
+ *
+ * @param value the new increment (must be greater than zero)
+ *
+ * @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 setIncrement (int value) {
+ checkWidget ();
+ if (value < 1) return;
+ increment = value;
+}
+
+/**
+ * Sets the maximum value which the receiver will allow
+ * to be the argument which must be greater than or
+ * equal to zero.
+ *
+ * @param value the new maximum (must be zero or greater)
+ *
+ * @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 setMaximum (int value) {
+ checkWidget ();
+ if (value < 0) return;
+ SCROLLINFO info = new SCROLLINFO ();
+ info.cbSize = SCROLLINFO.sizeof;
+ info.fMask = OS.SIF_RANGE | OS.SIF_DISABLENOSCROLL;
+ OS.GetScrollInfo (handle, OS.SB_CTL, info);
+ if (value - info.nMin - info.nPage < 1) return;
+ info.nMax = value;
+ OS.SetScrollInfo (handle, OS.SB_CTL, info, (state & DISABLED) == 0);
+
+ /*
+ * Feature in Windows. Using SIF_DISABLENOSCROLL,
+ * SetScrollInfo () can change enabled and disabled
+ * state of the scroll bar causing a scroll bar that
+ * was disabled by the application to become enabled.
+ * The fix is to disable the scroll bar (again) when
+ * the application has disabled the scroll bar.
+ */
+ if ((state & DISABLED) != 0) {
+ OS.EnableScrollBar (handle, OS.SB_CTL, OS.ESB_DISABLE_BOTH);
+ }
+
+ /*
+ * Bug in Windows. If the thumb is resized when it has focus,
+ * the flashing cursor that is used to show that the scroll bar has
+ * focus is not moved. The fix is to post a fake WM_SETFOCUS to
+ * get the scroll bar to recompute the size of the flashing cursor.
+ */
+ if (OS.GetFocus () == handle) {
+ OS.PostMessage (handle, OS.WM_SETFOCUS, 0, 0);
+ }
+}
+
+/**
+ * Sets the minimum value which the receiver will allow
+ * to be the argument which must be greater than or
+ * equal to zero.
+ *
+ * @param value the new minimum (must be zero or greater)
+ *
+ * @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 setMinimum (int value) {
+ checkWidget ();
+ if (value < 0) return;
+ SCROLLINFO info = new SCROLLINFO ();
+ info.cbSize = SCROLLINFO.sizeof;
+ info.fMask = OS.SIF_RANGE | OS.SIF_DISABLENOSCROLL;
+ OS.GetScrollInfo (handle, OS.SB_CTL, info);
+ if (info.nMax - value - info.nPage < 1) return;
+ info.nMin = value;
+ OS.SetScrollInfo (handle, OS.SB_CTL, info, true);
+
+ /*
+ * Feature in Windows. Using SIF_DISABLENOSCROLL,
+ * SetScrollInfo () can change enabled and disabled
+ * state of the scroll bar causing a scroll bar that
+ * was disabled by the application to become enabled.
+ * The fix is to disable the scroll bar (again) when
+ * the application has disabled the scroll bar.
+ */
+ if ((state & DISABLED) != 0) {
+ OS.EnableScrollBar (handle, OS.SB_CTL, OS.ESB_DISABLE_BOTH);
+ }
+
+ /*
+ * Bug in Windows. If the thumb is resized when it has focus,
+ * the flashing cursor that is used to show that the scroll bar has
+ * focus is not moved. The fix is to post a fake WM_SETFOCUS to
+ * get the scroll bar to recompute the size of the flashing cursor.
+ */
+ if (OS.GetFocus () == handle) {
+ OS.PostMessage (handle, OS.WM_SETFOCUS, 0, 0);
+ }
+}
+
+/**
+ * Sets the amount that the receiver's value will be
+ * modified by when the page increment/decrement areas
+ * are selected to the argument, which must be at least
+ * one.
+ *
+ * @return the page increment (must be greater than zero)
+ *
+ * @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 setPageIncrement (int value) {
+ checkWidget ();
+ if (value < 1) return;
+ pageIncrement = value;
+}
+
+/**
+ * Sets the single <em>selection</em> that is the receiver's
+ * value to the argument which must be greater than or equal
+ * to zero.
+ *
+ * @param value the new selection (must be zero or greater)
+ *
+ * @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 setSelection (int value) {
+ checkWidget ();
+ if (value < 0) return;
+ SCROLLINFO info = new SCROLLINFO ();
+ info.cbSize = SCROLLINFO.sizeof;
+ info.fMask = OS.SIF_POS;
+ info.nPos = value;
+ OS.SetScrollInfo (handle, OS.SB_CTL, info, true);
+}
+
+/**
+ * Sets the size of the receiver's thumb relative to the
+ * difference between its maximum and minimum values to the
+ * argument which must be at least one.
+ *
+ * @param value the new thumb value (must be at least one)
+ *
+ * @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 ScrollBar
+ */
+public void setThumb (int value) {
+ checkWidget ();
+
+ /* Position the thumb */
+ if (value < 1) return;
+ SCROLLINFO info = new SCROLLINFO ();
+ info.cbSize = SCROLLINFO.sizeof;
+ info.fMask = OS.SIF_PAGE | OS.SIF_RANGE | OS.SIF_DISABLENOSCROLL;
+ OS.GetScrollInfo (handle, OS.SB_CTL, info);
+ if (info.nMax - info.nMin - value < 0) return;
+ info.nPage = value;
+ if (info.nPage != 0) info.nPage++;
+ OS.SetScrollInfo (handle, OS.SB_CTL, info, true);
+
+ /*
+ * Feature in Windows. Using SIF_DISABLENOSCROLL,
+ * SetScrollInfo () can change enabled and disabled
+ * state of the scroll bar causing a scroll bar that
+ * was disabled by the application to become enabled.
+ * The fix is to disable the scroll bar (again) when
+ * the application has disabled the scroll bar.
+ */
+ if ((state & DISABLED) != 0) {
+ OS.EnableScrollBar (handle, OS.SB_CTL, OS.ESB_DISABLE_BOTH);
+ }
+
+ /*
+ * Bug in Windows. If the thumb is resized when it has focus,
+ * the flashing cursor that is used to show that the scroll bar has
+ * focus is not moved. The fix is to post a fake WM_SETFOCUS to
+ * get the scroll bar to recompute the size of the flashing cursor.
+ */
+ if (OS.GetFocus () == handle) {
+ OS.PostMessage (handle, OS.WM_SETFOCUS, 0, 0);
+ }
+}
+
+/**
+ * Sets the receiver's selection, minimum value, maximum
+ * value, thumb, increment and page increment all at once.
+ * <p>
+ * Note: This is equivalent to setting the values individually
+ * using the appropriate methods, but may be implemented in a
+ * more efficient fashion on some platforms.
+ * </p>
+ *
+ * @param selection the new selection value
+ * @param minimum the new minimum value
+ * @param maximum the new maximum value
+ * @param thumb the new thumb value
+ * @param increment the new increment value
+ * @param pageIncrement the new pageIncrement value
+ *
+ * @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 setValues (int selection, int minimum, int maximum, int thumb, int increment, int pageIncrement) {
+ checkWidget ();
+ if (selection < 0) return;
+ if (minimum < 0) return;
+ if (maximum < 0) return;
+ if (thumb < 1) return;
+ if (maximum - minimum - thumb < 0) return;
+ if (increment < 1) return;
+ if (pageIncrement < 1) return;
+ this.increment = increment;
+ this.pageIncrement = pageIncrement;
+ SCROLLINFO info = new SCROLLINFO ();
+ info.cbSize = SCROLLINFO.sizeof;
+ info.fMask = OS.SIF_POS | OS.SIF_PAGE | OS.SIF_RANGE | OS.SIF_DISABLENOSCROLL;
+ info.nPos = selection;
+ info.nMin = minimum;
+ info.nMax = maximum;
+ info.nPage = thumb;
+ if (info.nPage != 0) info.nPage++;
+ OS.SetScrollInfo (handle, OS.SB_CTL, info, true);
+
+ /*
+ * Feature in Windows. Using SIF_DISABLENOSCROLL,
+ * SetScrollInfo () can change enabled and disabled
+ * state of the scroll bar causing a scroll bar that
+ * was disabled by the application to become enabled.
+ * The fix is to disable the scroll bar (again) when
+ * the application has disabled the scroll bar.
+ */
+ if ((state & DISABLED) != 0) {
+ OS.EnableScrollBar (handle, OS.SB_CTL, OS.ESB_DISABLE_BOTH);
+ }
+
+ /*
+ * Bug in Windows. If the thumb is resized when it has focus,
+ * the flashing cursor that is used to show that the scroll bar has
+ * focus is not moved. The fix is to post a fake WM_SETFOCUS to
+ * get the scroll bar to recompute the size of the flashing cursor.
+ */
+ if (OS.GetFocus () == handle) {
+ OS.PostMessage (handle, OS.WM_SETFOCUS, 0, 0);
+ }
+}
+
+int widgetExtStyle () {
+ /*
+ * Bug in Windows. If a scroll bar control is given a border,
+ * dragging the scroll bar thumb eats away parts of the border
+ * while the thumb is dragged. The fix is to clear WS_BORDER
+ * for all scroll bars.
+ */
+ int bits = super.widgetExtStyle ();
+ if ((style & SWT.BORDER) != 0) bits &= ~OS.WS_EX_CLIENTEDGE;
+ return bits;
+}
+
+int widgetStyle () {
+ int bits = super.widgetStyle () | OS.WS_TABSTOP;
+ /*
+ * Bug in Windows. If a scroll bar control is given a border,
+ * dragging the scroll bar thumb eats away parts of the border
+ * while the thumb is dragged. The fix is to clear WS_BORDER.
+ */
+ if ((style & SWT.BORDER) != 0) bits &= ~OS.WS_BORDER;
+ if ((style & SWT.HORIZONTAL) != 0) return bits | OS.SBS_HORZ;
+ return bits | OS.SBS_VERT;
+}
+
+byte [] windowClass () {
+ return ScrollBarClass;
+}
+
+int windowProc () {
+ return ScrollBarProc;
+}
+
+LRESULT WM_LBUTTONDBLCLK (int wParam, int lParam) {
+
+ /*
+ * Feature in Windows. For some reason, capturing
+ * the mouse after processing WM_LBUTTONDBLCLK for the
+ * widget interferes with the normal mouse processing
+ * for the widget. The fix is to avoid the automatic
+ * mouse capture.
+ */
+
+ /*
+ * Feature in Windows. Windows uses the WS_TABSTOP
+ * style for the scroll bar to decide that focus
+ * should be set during WM_LBUTTONDBLCLK. This is
+ * not the desired behavior. The fix is to clear
+ * and restore WS_TABSTOP so that Windows will not
+ * assign focus.
+ */
+
+ int hwndCapture = OS.GetCapture ();
+ int oldBits = OS.GetWindowLong (handle, OS.GWL_STYLE);
+ int newBits = oldBits & ~OS.WS_TABSTOP;
+ OS.SetWindowLong (handle, OS.GWL_STYLE, newBits);
+ LRESULT result = super.WM_LBUTTONDBLCLK (wParam, lParam);
+ OS.SetWindowLong (handle, OS.GWL_STYLE, oldBits);
+ if (OS.GetCapture () != hwndCapture) OS.SetCapture (hwndCapture);
+ return result;
+}
+
+LRESULT WM_LBUTTONDOWN (int wParam, int lParam) {
+
+ /*
+ * Feature in Windows. For some reason, capturing
+ * the mouse after processing WM_LBUTTONDOWN for the
+ * widget interferes with the normal mouse processing
+ * for the widget. The fix is to avoid the automatic
+ * mouse capture.
+ */
+
+ /*
+ * Feature in Windows. Windows uses the WS_TABSTOP
+ * style for the scroll bar to decide that focus
+ * should be set during WM_LBUTTONDOWN. This is
+ * not the desired behavior. The fix is to clear
+ * and restore WS_TABSTOP so that Windows will not
+ * assign focus.
+ */
+
+ int hwndCapture = OS.GetCapture ();
+ int oldBits = OS.GetWindowLong (handle, OS.GWL_STYLE);
+ int newBits = oldBits & ~OS.WS_TABSTOP;
+ OS.SetWindowLong (handle, OS.GWL_STYLE, newBits);
+ LRESULT result = super.WM_LBUTTONDOWN (wParam, lParam);
+ OS.SetWindowLong (handle, OS.GWL_STYLE, oldBits);
+ if (OS.GetCapture () != hwndCapture) OS.SetCapture (hwndCapture);
+ return result;
+}
+
+LRESULT wmScrollChild (int wParam, int lParam) {
+
+ /* Do nothing when scrolling is ending */
+ int code = wParam & 0xFFFF;
+ if (code == OS.SB_ENDSCROLL) return null;
+
+ /* Move the thumb */
+ Event event = new Event ();
+ SCROLLINFO info = new SCROLLINFO ();
+ info.cbSize = SCROLLINFO.sizeof;
+ info.fMask = OS.SIF_TRACKPOS | OS.SIF_POS | OS.SIF_RANGE;
+ OS.GetScrollInfo (handle, OS.SB_CTL, info);
+ info.fMask = OS.SIF_POS;
+ switch (code) {
+ case OS.SB_THUMBPOSITION:
+ /*
+ * Do not set the detail field to DRAG to
+ * indicate that the dragging has ended.
+ */
+ info.nPos = info.nTrackPos;
+ break;
+ case OS.SB_THUMBTRACK:
+ event.detail = SWT.DRAG;
+ info.nPos = info.nTrackPos;
+ break;
+ case OS.SB_TOP:
+ event.detail = SWT.HOME;
+ info.nPos = info.nMin;
+ break;
+ case OS.SB_BOTTOM:
+ event.detail = SWT.END;
+ info.nPos = info.nMax;
+ break;
+ case OS.SB_LINEDOWN:
+ event.detail = SWT.ARROW_DOWN;
+ info.nPos += increment;
+ break;
+ case OS.SB_LINEUP:
+ event.detail = SWT.ARROW_UP;
+ info.nPos = Math.max (info.nMin, info.nPos - increment);
+ break;
+ case OS.SB_PAGEDOWN:
+ event.detail = SWT.PAGE_DOWN;
+ info.nPos += pageIncrement;
+ break;
+ case OS.SB_PAGEUP:
+ event.detail = SWT.PAGE_UP;
+ info.nPos = Math.max (info.nMin, info.nPos - pageIncrement);
+ break;
+ }
+ OS.SetScrollInfo (handle, OS.SB_CTL, info, true);
+
+ /*
+ * Send the event because WM_HSCROLL and
+ * WM_VSCROLL are sent from a modal message
+ * loop in Windows that is active when the
+ * user is scrolling.
+ */
+ sendEvent (SWT.Selection, event);
+ // the widget could be destroyed at this point
+ return null;
+}
+
+}

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