bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Sash.java - platform/eclipse.platform.swt - Git at Google

 package org.eclipse.swt.widgets;

 /*
  * (c) Copyright IBM Corp. 2000, 2001.
  * All Rights Reserved
  */

 import org.eclipse.swt.internal.win32.*;
 import org.eclipse.swt.*;
 import org.eclipse.swt.graphics.*;
 import org.eclipse.swt.events.*;

 /**
  * Instances of the receiver represent a selectable user interface object
  * that allows the user to drag a rubber banded outline of the sash within
  * the parent control.
  * <dl>
  * <dt><b>Styles:</b></dt>
  * <dd> HORIZONTAL, VERTICAL</dd>
  * <dt><b>Events:</b></dt>
  * <dd>Selection</dd>
  * </dl>
  * <p>
  * IMPORTANT: This class is intended to be subclassed <em>only</em>
  * within the SWT implementation.
  * </p>
  */
 public class Sash extends Control {
 	boolean dragging;
 	int startX, startY, lastX, lastY;
 	final static int INCREMENT = 1;
 	final static int PAGE_INCREMENT = 9;

 /**
  * 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
  * for all SWT widget classes should include a comment which
  * describes the style constants which are applicable to the class.
  * </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
  * @see Widget#checkSubclass
  * @see Widget#getStyle
  */
 public Sash (Composite parent, int style) {
 	super (parent, checkStyle (style));
 }

 /**
  * Adds the listener to the collection of listeners who will
  * be notified when the control is selected, by sending
  * it one of the messages defined in the <code>SelectionListener</code>
  * interface.
  * <p>
  * When <code>widgetSelected</code> is called, the x, y, width, and height fields of the event object are valid.
  * If the reciever is being dragged, the event object detail field contains the value <code>SWT.DRAG</code>.
  * <code>widgetDefaultSelected</code> is not called.
  * </p>
  *
  * @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
  * @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);
 }

 int callWindowProc (int msg, int wParam, int lParam) {
 	if (handle == 0) return 0;
 	return OS.DefWindowProc (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 += DEFAULT_WIDTH;  height += 3;
 	} else {
 		width += 3; height += DEFAULT_HEIGHT;
 	}
 	if (wHint != SWT.DEFAULT) width = wHint + (border * 2);
 	if (hHint != SWT.DEFAULT) height = hHint + (border * 2);
 	return new Point (width, height);
 }

 void drawBand (int x, int y, int width, int height) {
 	int hwndTrack = parent.handle;
 	byte [] bits = {-86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0};
 	int stippleBitmap = OS.CreateBitmap (8, 8, 1, 1, bits);
 	int stippleBrush = OS.CreatePatternBrush (stippleBitmap);
 	int hDC = OS.GetDCEx (hwndTrack, 0, OS.DCX_CACHE);
 	int oldBrush = OS.SelectObject (hDC, stippleBrush);
 	OS.PatBlt (hDC, x, y, width, height, OS.PATINVERT);
 	OS.SelectObject (hDC, oldBrush);
 	OS.ReleaseDC (hwndTrack, hDC);
 	OS.DeleteObject (stippleBrush);
 	OS.DeleteObject (stippleBitmap);
 }

 /**
  * Removes the listener from the collection of listeners who will
  * be notified when the control is selected.
  *
  * @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 #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);
 }

 TCHAR windowClass () {
 	return getDisplay ().windowClass;
 }

 int windowProc () {
 	return getDisplay ().windowProc;
 }

 LRESULT WM_ERASEBKGND (int wParam, int lParam) {
 	LRESULT result = super.WM_ERASEBKGND (wParam, lParam);
 	if (result != null) return result;
 	drawBackground (wParam);
 	return LRESULT.ONE;
 }

 LRESULT WM_KEYDOWN (int wParam, int lParam) {
 	LRESULT result = super.WM_KEYDOWN (wParam, lParam);
 	if (result != null) return result;
 	switch (wParam) {
 		case OS.VK_LEFT:
 		case OS.VK_RIGHT:
 		case OS.VK_UP:
 		case OS.VK_DOWN:

 			/* Calculate the new x or y position */
 			if (OS.GetKeyState (OS.VK_LBUTTON) < 0) return result;
 			int step = OS.GetKeyState (OS.VK_CONTROL) < 0 ? INCREMENT : PAGE_INCREMENT;
 			POINT pt = new POINT ();
 			if ((style & SWT.VERTICAL) != 0) {
 				if (wParam == OS.VK_UP || wParam == OS.VK_DOWN) break;
 				pt.x = wParam == OS.VK_LEFT ? -step : step;
 			} else {
 				if (wParam == OS.VK_LEFT || wParam == OS.VK_RIGHT) break;
 				pt.y = wParam == OS.VK_UP ? -step : step;
 			}
 			int hwndTrack = parent.handle;
 			OS.MapWindowPoints (handle, hwndTrack, pt, 1);
 			RECT rect = new RECT (), clientRect = new RECT ();
 			OS.GetWindowRect (handle, rect);
 			int width = rect.right - rect.left;
 			int height = rect.bottom - rect.top;
 			OS.GetClientRect (hwndTrack, clientRect);
 			int clientWidth = clientRect.right - clientRect.left;
 			int clientHeight = clientRect.bottom - clientRect.top;
 			int newX = lastX, newY = lastY;
 			if ((style & SWT.VERTICAL) != 0) {
 				newX = Math.min (Math.max (0, pt.x - startX), clientWidth - width);
 			} else {
 				newY = Math.min (Math.max (0, pt.y - startY), clientHeight - height);
 			}
 			if (newX == lastX && newY == lastY) return result;

 			/* The event must be sent because doit flag is used */
 			Event event = new Event ();
 			event.x = newX;  event.y = newY;
 			event.width = width;  event.height = height;

 			/*
 			* It is possible (but unlikely), that application
 			* code could have disposed the widget in the selection
 			* event.  If this happens, end the processing of the
 			* Windows message by returning zero as the result of
 			* the window proc.
 			*/
 			sendEvent (SWT.Selection, event);
 			if (isDisposed ()) return LRESULT.ZERO;
 			return result;
 	}
 	return result;
 }

 LRESULT WM_GETDLGCODE (int wParam, int lParam) {
 	return new LRESULT (OS.DLGC_STATIC);
 }

 LRESULT WM_LBUTTONDOWN (int wParam, int lParam) {
 	LRESULT result = super.WM_LBUTTONDOWN (wParam, lParam);

 	/* Compute the banding rectangle */
 	int hwndTrack = parent.handle;
 	POINT pt = new POINT ();
 	pt.x = (short) (lParam & 0xFFFF);
 	pt.y = (short) (lParam >> 16);
 	RECT rect = new RECT ();
 	OS.GetWindowRect (handle, rect);
 	OS.MapWindowPoints (handle, 0, pt, 1);
 	startX = pt.x - rect.left;
 	startY = pt.y - rect.top;
 	OS.MapWindowPoints (0, hwndTrack, rect, 2);
 	lastX = rect.left;  lastY = rect.top;
 	int width = rect.right - rect.left;
 	int height = rect.bottom - rect.top;

 	/* The event must be sent because doit flag is used */
 	Event event = new Event ();
 	event.x = lastX;  event.y = lastY;
 	event.width = width;  event.height = height;
 	event.detail = SWT.DRAG;

 	/*
 	* It is possible (but unlikely), that application
 	* code could have disposed the widget in the selection
 	* event.  If this happens, end the processing of the
 	* Windows message by returning zero as the result of
 	* the window proc.
 	*/
 	sendEvent (SWT.Selection, event);
 	if (isDisposed ()) return LRESULT.ZERO;

 	/* Draw the banding rectangle */
 	if (event.doit) {
 		dragging = true;
 		menuShell ().bringToTop ();
 		if (OS.IsWinCE) {
 			OS.UpdateWindow (hwndTrack);
 		} else {
 			int flags = OS.RDW_UPDATENOW | OS.RDW_ALLCHILDREN;
 			OS.RedrawWindow (hwndTrack, null, 0, flags);
 		}
 		drawBand (lastX = event.x, lastY = event.y, width, height);
 	}
 	return result;
 }

 LRESULT WM_LBUTTONUP (int wParam, int lParam) {
 	LRESULT result = super.WM_LBUTTONUP (wParam, lParam);

 	/* Compute the banding rectangle */
 	if (!dragging) return result;
 	dragging = false;
 	RECT rect = new RECT ();
 	OS.GetWindowRect (handle, rect);
 	int width = rect.right - rect.left;
 	int height = rect.bottom - rect.top;

 	/* The event must be sent because doit flag is used */
 	Event event = new Event ();
 	event.x = lastX;  event.y = lastY;
 	event.width = width;  event.height = height;
 	drawBand (lastX, lastY, width, height);
 	sendEvent (SWT.Selection, event);
 	// widget could be disposed at this point
 	return result;
 }

 LRESULT WM_MOUSEMOVE (int wParam, int lParam) {
 	LRESULT result = super.WM_MOUSEMOVE (wParam, lParam);
 	if (result != null) return result;
 	if (!dragging || ((wParam & OS.MK_LBUTTON) == 0)) return result;

 	/* Compute the banding rectangle */
 	POINT pt = new POINT ();
 	pt.x = (short) (lParam & 0xFFFF);
 	pt.y = (short) (lParam >> 16);
 	int hwndTrack = parent.handle;
 	OS.MapWindowPoints (handle, hwndTrack, pt, 1);
 	RECT rect = new RECT (), clientRect = new RECT ();
 	OS.GetWindowRect (handle, rect);
 	int width = rect.right - rect.left;
 	int height = rect.bottom - rect.top;
 	OS.GetClientRect (hwndTrack, clientRect);
 	int clientWidth = clientRect.right - clientRect.left;
 	int clientHeight = clientRect.bottom - clientRect.top;
 	int newX = lastX, newY = lastY;
 	if ((style & SWT.VERTICAL) != 0) {
 		newX = Math.min (Math.max (0, pt.x - startX), clientWidth - width);
 	} else {
 		newY = Math.min (Math.max (0, pt.y - startY), clientHeight - height);
 	}
 	if (newX == lastX && newY == lastY) return result;
 	drawBand (lastX, lastY, width, height);

 	/* The event must be sent because doit flag is used */
 	Event event = new Event ();
 	event.x = newX;  event.y = newY;
 	event.width = width;  event.height = height;
 	event.detail = SWT.DRAG;

 	/*
 	* It is possible (but unlikely), that application
 	* code could have disposed the widget in the selection
 	* event.  If this happens, end the processing of the
 	* Windows message by returning zero as the result of
 	* the window proc.
 	*/
 	sendEvent (SWT.Selection, event);
 	if (isDisposed ()) return LRESULT.ZERO;

 	/* Draw the banding rectangle */
 	if (event.doit) {
 		lastX = event.x; lastY = event.y;
 		if (OS.IsWinCE) {
 			OS.UpdateWindow (hwndTrack);
 		} else {
 			int flags = OS.RDW_UPDATENOW | OS.RDW_ALLCHILDREN;
 			OS.RedrawWindow (hwndTrack, null, 0, flags);
 		}
 		drawBand (lastX, lastY, width, height);
 	}
 	return result;
 }

 LRESULT WM_SETCURSOR (int wParam, int lParam) {
 	LRESULT result = super.WM_SETCURSOR (wParam, lParam);
 	if (result != null) return result;
 	int hitTest = lParam & 0xFFFF;
  	if (hitTest == OS.HTCLIENT) {
 	 	int hCursor;
 	 	if ((style & SWT.HORIZONTAL) != 0) {
 			hCursor = OS.LoadCursor (0, OS.IDC_SIZENS);
 	 	} else {
 			hCursor = OS.LoadCursor (0, OS.IDC_SIZEWE);
 	 	}
 		OS.SetCursor (hCursor);
 		return LRESULT.ONE;
 	}
 	return result;
 }

 }
	package org.eclipse.swt.widgets;

	/*
	* (c) Copyright IBM Corp. 2000, 2001.
	* All Rights Reserved
	*/

	import org.eclipse.swt.internal.win32.*;
	import org.eclipse.swt.*;
	import org.eclipse.swt.graphics.*;
	import org.eclipse.swt.events.*;

	/**
	* Instances of the receiver represent a selectable user interface object
	* that allows the user to drag a rubber banded outline of the sash within
	* the parent control.
	* <dl>
	* <dt><b>Styles:</b></dt>
	* <dd> HORIZONTAL, VERTICAL</dd>
	* <dt><b>Events:</b></dt>
	* <dd>Selection</dd>
	* </dl>
	* <p>
	* IMPORTANT: This class is intended to be subclassed <em>only</em>
	* within the SWT implementation.
	* </p>
	*/
	public class Sash extends Control {
	boolean dragging;
	int startX, startY, lastX, lastY;
	final static int INCREMENT = 1;
	final static int PAGE_INCREMENT = 9;

	/**
	* 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
	* for all SWT widget classes should include a comment which
	* describes the style constants which are applicable to the class.
	* </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
	* @see Widget#checkSubclass
	* @see Widget#getStyle
	*/
	public Sash (Composite parent, int style) {
	super (parent, checkStyle (style));
	}

	/**
	* Adds the listener to the collection of listeners who will
	* be notified when the control is selected, by sending
	* it one of the messages defined in the <code>SelectionListener</code>
	* interface.
	* <p>
	* When <code>widgetSelected</code> is called, the x, y, width, and height fields of the event object are valid.
	* If the reciever is being dragged, the event object detail field contains the value <code>SWT.DRAG</code>.
	* <code>widgetDefaultSelected</code> is not called.
	* </p>
	*
	* @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
	* @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);
	}

	int callWindowProc (int msg, int wParam, int lParam) {
	if (handle == 0) return 0;
	return OS.DefWindowProc (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 += DEFAULT_WIDTH; height += 3;
	} else {
	width += 3; height += DEFAULT_HEIGHT;
	}
	if (wHint != SWT.DEFAULT) width = wHint + (border * 2);
	if (hHint != SWT.DEFAULT) height = hHint + (border * 2);
	return new Point (width, height);
	}

	void drawBand (int x, int y, int width, int height) {
	int hwndTrack = parent.handle;
	byte [] bits = {-86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0};
	int stippleBitmap = OS.CreateBitmap (8, 8, 1, 1, bits);
	int stippleBrush = OS.CreatePatternBrush (stippleBitmap);
	int hDC = OS.GetDCEx (hwndTrack, 0, OS.DCX_CACHE);
	int oldBrush = OS.SelectObject (hDC, stippleBrush);
	OS.PatBlt (hDC, x, y, width, height, OS.PATINVERT);
	OS.SelectObject (hDC, oldBrush);
	OS.ReleaseDC (hwndTrack, hDC);
	OS.DeleteObject (stippleBrush);
	OS.DeleteObject (stippleBitmap);
	}

	/**
	* Removes the listener from the collection of listeners who will
	* be notified when the control is selected.
	*
	* @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 #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);
	}

	TCHAR windowClass () {
	return getDisplay ().windowClass;
	}

	int windowProc () {
	return getDisplay ().windowProc;
	}

	LRESULT WM_ERASEBKGND (int wParam, int lParam) {
	LRESULT result = super.WM_ERASEBKGND (wParam, lParam);
	if (result != null) return result;
	drawBackground (wParam);
	return LRESULT.ONE;
	}

	LRESULT WM_KEYDOWN (int wParam, int lParam) {
	LRESULT result = super.WM_KEYDOWN (wParam, lParam);
	if (result != null) return result;
	switch (wParam) {
	case OS.VK_LEFT:
	case OS.VK_RIGHT:
	case OS.VK_UP:
	case OS.VK_DOWN:

	/* Calculate the new x or y position */
	if (OS.GetKeyState (OS.VK_LBUTTON) < 0) return result;
	int step = OS.GetKeyState (OS.VK_CONTROL) < 0 ? INCREMENT : PAGE_INCREMENT;
	POINT pt = new POINT ();
	if ((style & SWT.VERTICAL) != 0) {
	if (wParam == OS.VK_UP \|\| wParam == OS.VK_DOWN) break;
	pt.x = wParam == OS.VK_LEFT ? -step : step;
	} else {
	if (wParam == OS.VK_LEFT \|\| wParam == OS.VK_RIGHT) break;
	pt.y = wParam == OS.VK_UP ? -step : step;
	}
	int hwndTrack = parent.handle;
	OS.MapWindowPoints (handle, hwndTrack, pt, 1);
	RECT rect = new RECT (), clientRect = new RECT ();
	OS.GetWindowRect (handle, rect);
	int width = rect.right - rect.left;
	int height = rect.bottom - rect.top;
	OS.GetClientRect (hwndTrack, clientRect);
	int clientWidth = clientRect.right - clientRect.left;
	int clientHeight = clientRect.bottom - clientRect.top;
	int newX = lastX, newY = lastY;
	if ((style & SWT.VERTICAL) != 0) {
	newX = Math.min (Math.max (0, pt.x - startX), clientWidth - width);
	} else {
	newY = Math.min (Math.max (0, pt.y - startY), clientHeight - height);
	}
	if (newX == lastX && newY == lastY) return result;

	/* The event must be sent because doit flag is used */
	Event event = new Event ();
	event.x = newX; event.y = newY;
	event.width = width; event.height = height;

	/*
	* It is possible (but unlikely), that application
	* code could have disposed the widget in the selection
	* event. If this happens, end the processing of the
	* Windows message by returning zero as the result of
	* the window proc.
	*/
	sendEvent (SWT.Selection, event);
	if (isDisposed ()) return LRESULT.ZERO;
	return result;
	}
	return result;
	}

	LRESULT WM_GETDLGCODE (int wParam, int lParam) {
	return new LRESULT (OS.DLGC_STATIC);
	}

	LRESULT WM_LBUTTONDOWN (int wParam, int lParam) {
	LRESULT result = super.WM_LBUTTONDOWN (wParam, lParam);

	/* Compute the banding rectangle */
	int hwndTrack = parent.handle;
	POINT pt = new POINT ();
	pt.x = (short) (lParam & 0xFFFF);
	pt.y = (short) (lParam >> 16);
	RECT rect = new RECT ();
	OS.GetWindowRect (handle, rect);
	OS.MapWindowPoints (handle, 0, pt, 1);
	startX = pt.x - rect.left;
	startY = pt.y - rect.top;
	OS.MapWindowPoints (0, hwndTrack, rect, 2);
	lastX = rect.left; lastY = rect.top;
	int width = rect.right - rect.left;
	int height = rect.bottom - rect.top;

	/* The event must be sent because doit flag is used */
	Event event = new Event ();
	event.x = lastX; event.y = lastY;
	event.width = width; event.height = height;
	event.detail = SWT.DRAG;

	/*
	* It is possible (but unlikely), that application
	* code could have disposed the widget in the selection
	* event. If this happens, end the processing of the
	* Windows message by returning zero as the result of
	* the window proc.
	*/
	sendEvent (SWT.Selection, event);
	if (isDisposed ()) return LRESULT.ZERO;

	/* Draw the banding rectangle */
	if (event.doit) {
	dragging = true;
	menuShell ().bringToTop ();
	if (OS.IsWinCE) {
	OS.UpdateWindow (hwndTrack);
	} else {
	int flags = OS.RDW_UPDATENOW \| OS.RDW_ALLCHILDREN;
	OS.RedrawWindow (hwndTrack, null, 0, flags);
	}
	drawBand (lastX = event.x, lastY = event.y, width, height);
	}
	return result;
	}

	LRESULT WM_LBUTTONUP (int wParam, int lParam) {
	LRESULT result = super.WM_LBUTTONUP (wParam, lParam);

	/* Compute the banding rectangle */
	if (!dragging) return result;
	dragging = false;
	RECT rect = new RECT ();
	OS.GetWindowRect (handle, rect);
	int width = rect.right - rect.left;
	int height = rect.bottom - rect.top;

	/* The event must be sent because doit flag is used */
	Event event = new Event ();
	event.x = lastX; event.y = lastY;
	event.width = width; event.height = height;
	drawBand (lastX, lastY, width, height);
	sendEvent (SWT.Selection, event);
	// widget could be disposed at this point
	return result;
	}

	LRESULT WM_MOUSEMOVE (int wParam, int lParam) {
	LRESULT result = super.WM_MOUSEMOVE (wParam, lParam);
	if (result != null) return result;
	if (!dragging \|\| ((wParam & OS.MK_LBUTTON) == 0)) return result;

	/* Compute the banding rectangle */
	POINT pt = new POINT ();
	pt.x = (short) (lParam & 0xFFFF);
	pt.y = (short) (lParam >> 16);
	int hwndTrack = parent.handle;
	OS.MapWindowPoints (handle, hwndTrack, pt, 1);
	RECT rect = new RECT (), clientRect = new RECT ();
	OS.GetWindowRect (handle, rect);
	int width = rect.right - rect.left;
	int height = rect.bottom - rect.top;
	OS.GetClientRect (hwndTrack, clientRect);
	int clientWidth = clientRect.right - clientRect.left;
	int clientHeight = clientRect.bottom - clientRect.top;
	int newX = lastX, newY = lastY;
	if ((style & SWT.VERTICAL) != 0) {
	newX = Math.min (Math.max (0, pt.x - startX), clientWidth - width);
	} else {
	newY = Math.min (Math.max (0, pt.y - startY), clientHeight - height);
	}
	if (newX == lastX && newY == lastY) return result;
	drawBand (lastX, lastY, width, height);

	/* The event must be sent because doit flag is used */
	Event event = new Event ();
	event.x = newX; event.y = newY;
	event.width = width; event.height = height;
	event.detail = SWT.DRAG;

	/*
	* It is possible (but unlikely), that application
	* code could have disposed the widget in the selection
	* event. If this happens, end the processing of the
	* Windows message by returning zero as the result of
	* the window proc.
	*/
	sendEvent (SWT.Selection, event);
	if (isDisposed ()) return LRESULT.ZERO;

	/* Draw the banding rectangle */
	if (event.doit) {
	lastX = event.x; lastY = event.y;
	if (OS.IsWinCE) {
	OS.UpdateWindow (hwndTrack);
	} else {
	int flags = OS.RDW_UPDATENOW \| OS.RDW_ALLCHILDREN;
	OS.RedrawWindow (hwndTrack, null, 0, flags);
	}
	drawBand (lastX, lastY, width, height);
	}
	return result;
	}

	LRESULT WM_SETCURSOR (int wParam, int lParam) {
	LRESULT result = super.WM_SETCURSOR (wParam, lParam);
	if (result != null) return result;
	int hitTest = lParam & 0xFFFF;
	if (hitTest == OS.HTCLIENT) {
	int hCursor;
	if ((style & SWT.HORIZONTAL) != 0) {
	hCursor = OS.LoadCursor (0, OS.IDC_SIZENS);
	} else {
	hCursor = OS.LoadCursor (0, OS.IDC_SIZEWE);
	}
	OS.SetCursor (hCursor);
	return LRESULT.ONE;
	}
	return result;
	}

	}