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

 /*******************************************************************************
  * Copyright (c) 2000, 2008 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.internal.motif.*;
 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, SMOOTH</dd>
  * <dt><b>Events:</b></dt>
  * <dd>Selection</dd>
  * </dl>
  * <p>
  * Note: Only one of the styles HORIZONTAL and VERTICAL may be specified.
  * </p><p>
  * IMPORTANT: This class is intended to be subclassed <em>only</em>
  * within the SWT implementation.
  * </p>
  *
  * @see <a href="http://www.eclipse.org/swt/snippets/#sash">Sash 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 Sash extends Control {
 	boolean dragging;
 	int startX, startY, lastX, lastY;
 	int cursor;
 	private final static int INCREMENT = 1;
 	private 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
  * 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#HORIZONTAL
  * @see SWT#VERTICAL
  * @see SWT#SMOOTH
  * @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 the user, 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 receiver 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 when the control is selected by the user
  *
  * @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);
 }
 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 createHandle (int index) {
 	state |= THEME_BACKGROUND;
 	int border = (style & SWT.BORDER) != 0 ? 1 : 0;
 	int [] argList = {
 		OS.XmNborderWidth, border,
 		OS.XmNmarginWidth, 0,
 		OS.XmNmarginHeight, 0,
 		OS.XmNresizePolicy, OS.XmRESIZE_NONE,
 		OS.XmNancestorSensitive, 1,
 		OS.XmNtraversalOn, 0,
 	};
 	int parentHandle = parent.handle;
 	handle = OS.XmCreateDrawingArea (parentHandle, null, argList, argList.length / 2);
 }
 void drawBand (int x, int y, int width, int height) {
 	if ((style & SWT.SMOOTH) != 0) return;
 	int display = OS.XtDisplay (parent.handle);
 	if (display == 0) return;
 	int window = OS.XtWindow (parent.handle);
 	if (window == 0) return;
 	int foreground = parent.getForegroundPixel ();
 	Control control = parent.findBackgroundControl ();
 	if (control == null) control = parent;
 	int background = control.getBackgroundPixel ();
 	int color = foreground ^ background;
 	byte [] bits = {-86, 85, -86, 85, -86, 85, -86, 85};
 	int stipplePixmap = OS.XCreateBitmapFromData (display, window, bits, 8, 8);
 	int gc = OS.XCreateGC (display, window, 0, null);
 	OS.XSetForeground (display, gc, color);
 	OS.XSetStipple (display, gc, stipplePixmap);
 	OS.XSetSubwindowMode (display, gc, OS.IncludeInferiors);
 	OS.XSetFillStyle (display, gc, OS.FillStippled);
 	OS.XSetFunction (display, gc, OS.GXxor);
 	OS.XFillRectangle (display, window, gc, x, y, width, height);
 	OS.XFreePixmap (display, stipplePixmap);
 	OS.XFreeGC (display, gc);
 }
 void propagateWidget (boolean enabled) {
 	int xCursor = enabled && super.cursor != null ? super.cursor.handle : cursor;
 	propagateHandle (enabled, handle, xCursor);
 }
 void realizeChildren () {
 	super.realizeChildren ();
 	int xWindow = OS.XtWindow (handle);
 	if (xWindow == 0) return;
 	int xDisplay = OS.XtDisplay (handle);
 	if (xDisplay == 0) return;
 	if ((style & SWT.HORIZONTAL) != 0) {
 		cursor = OS.XCreateFontCursor (xDisplay, OS.XC_sb_v_double_arrow);
 	} else {
 		cursor = OS.XCreateFontCursor (xDisplay, OS.XC_sb_h_double_arrow);
 	}
 	if (super.cursor == null && isEnabled ()) {
 		OS.XDefineCursor (xDisplay, xWindow, cursor);
 		OS.XFlush (xDisplay);
 	}
 }
 void releaseWidget () {
 	super.releaseWidget ();
 	if (cursor != 0) {
 		int display = OS.XtDisplay (handle);
 		if (display != 0) OS.XFreeCursor (display, cursor);
 	}
 	cursor = 0;
 }
 /**
  * Removes the listener from the collection of listeners who will
  * be notified when the control is selected by the user.
  *
  * @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);
 }
 public void setCursor (Cursor cursor) {
 	checkWidget();
 	super.setCursor (cursor);
 	if (cursor == null && this.cursor != 0) {
 		int xWindow = OS.XtWindow (handle);
 		if (xWindow == 0) return;
 		int xDisplay = OS.XtDisplay (handle);
 		if (xDisplay == 0) return;
 		OS.XDefineCursor (xDisplay, xWindow, this.cursor);
 		OS.XFlush (xDisplay);
 	}
 }
 public boolean setFocus () {
 	checkWidget();
 	return forceFocus ();
 }
 int XButtonPress (int w, int client_data, int call_data, int continue_to_dispatch) {
 	int result = super.XButtonPress (w, client_data, call_data, continue_to_dispatch);
 	if (result != 0) return result;
 	XButtonEvent xEvent = new XButtonEvent ();
 	OS.memmove (xEvent, call_data, XButtonEvent.sizeof);
 	if (xEvent.button != 1) return result;
 	short [] x_root = new short [1], y_root = new short [1];
 	OS.XtTranslateCoords (handle, (short) 0, (short) 0, x_root, y_root);
 	startX = xEvent.x_root - x_root [0];
 	startY = xEvent.y_root - y_root [0];
 	int [] argList = {OS.XmNx, 0, OS.XmNy, 0, OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0};
 	OS.XtGetValues (handle, argList, argList.length / 2);
 	int border = argList [9], width = argList [5] + (border * 2), height = argList [7] + (border * 2);
 	lastX = ((short) argList [1]) - border;  lastY = ((short) argList [3]) - border;
 	Event event = new Event ();
 	event.time = xEvent.time;
 	event.x = lastX;
 	event.y = lastY;
 	event.width = width;
 	event.height = height;
 	if ((style & SWT.SMOOTH) == 0) {
 		event.detail = SWT.DRAG;
 	}
 	sendEvent (SWT.Selection, event);
 	if (isDisposed ()) return result;
 	if (event.doit) {
 		dragging = true;
 		lastX = event.x;
 		lastY = event.y;
 		parent.update (true);
 		drawBand (event.x, event.y, width, height);
 		if ((style & SWT.SMOOTH) != 0) {
 			setBounds (event.x, event.y, width, height);
 			// widget could be disposed at this point
 		}
 	}
 	return result;
 }
 int XButtonRelease (int w, int client_data, int call_data, int continue_to_dispatch) {
 	int result = super.XButtonRelease (w, client_data, call_data, continue_to_dispatch);
 	if (result != 0) return result;
 	XButtonEvent xEvent = new XButtonEvent ();
 	OS.memmove (xEvent, call_data, XButtonEvent.sizeof);
 	if (xEvent.button != 1) return result;
 	if (!dragging) return result;
 	dragging = false;
 	int [] argList = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0};
 	OS.XtGetValues (handle, argList, argList.length / 2);
 	int border = argList [5];
 	int width = argList [1] + (border * 2), height = argList [3] + (border * 2);
 	Event event = new Event ();
 	event.time = xEvent.time;
 	event.x = lastX;
 	event.y = lastY;
 	event.width = width;
 	event.height = height;
 	drawBand (lastX, lastY, width, height);
 	sendEvent (SWT.Selection, event);
 	if (isDisposed ()) return result;
 	if (event.doit) {
 		if ((style & SWT.SMOOTH) != 0) {
 			setBounds (event.x, event.y, width, height);
 			// widget could be disposed at this point
 		}
 	}
 	return result;
 }
 int xFocusIn (XFocusChangeEvent xEvent) {
 	int result = super.xFocusIn (xEvent);
 	if (handle == 0) return result;
 	int [] argList = {OS.XmNx, 0, OS.XmNy, 0};
 	OS.XtGetValues (handle, argList, argList.length / 2);
 	lastX = argList [1];
 	lastY = argList [3];
 	return result;
 }
 int XKeyPress (int w, int client_data, int call_data, int continue_to_dispatch) {
 	int result = super.XKeyPress (w, client_data, call_data, continue_to_dispatch);
 	if (result != 0) return result;
 	XKeyEvent xEvent = new XKeyEvent ();
 	OS.memmove (xEvent, call_data, XKeyEvent.sizeof);
 	byte [] buffer = new byte [1];
 	int [] keysym = new int [1];
 	OS.XLookupString (xEvent, buffer, buffer.length, keysym, null);

 	switch (keysym [0]) {
 		case OS.XK_Left:
 		case OS.XK_Right:
 		case OS.XK_Up:
 		case OS.XK_Down:
 			int xChange = 0, yChange = 0;
 			int stepSize = PAGE_INCREMENT;
 			if ((xEvent.state & OS.ControlMask) != 0) stepSize = INCREMENT;
 			if ((style & SWT.VERTICAL) != 0) {
 				if (keysym [0] == OS.XK_Up || keysym [0] == OS.XK_Down) break;
 				xChange = keysym [0] == OS.XK_Left ? -stepSize : stepSize;
 			} else {
 				if (keysym [0] == OS.XK_Left || keysym [0] == OS.XK_Right) break;
 				yChange = keysym [0] == OS.XK_Up ? -stepSize : stepSize;
 			}

 			int [] argList1 = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0};
 			OS.XtGetValues (handle, argList1, argList1.length / 2);
 			int border = argList1 [5];
 			int width = argList1 [1] + (border * 2), height = argList1 [3] + (border * 2);
 			int [] argList2 = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0};
 			OS.XtGetValues (parent.handle, argList2, argList2.length / 2);
 			int parentBorder = argList2 [5];
 			int parentWidth = argList2 [1] + (parentBorder * 2);
 			int parentHeight = argList2 [3] + (parentBorder * 2);
 			int newX = lastX, newY = lastY;
 			if ((style & SWT.VERTICAL) != 0) {
 				newX = Math.min (Math.max (0, lastX + xChange - parentBorder - startX), parentWidth - width);
 			} else {
 				newY = Math.min (Math.max (0, lastY + yChange - parentBorder - startY), parentHeight - height);
 			}
 			if (newX == lastX && newY == lastY) return result;

 			/* Ensure that the pointer image does not change */
 			int xDisplay = display.xDisplay;
 			int xWindow = OS.XtWindow (parent.handle);
 			int ptrGrabResult = OS.XGrabPointer (
 				xDisplay,
 				xWindow,
 				1,
 				OS.None,
 				OS.GrabModeAsync,
 				OS.GrabModeAsync,
 				OS.None,
 				cursor,
 				OS.CurrentTime);

 			Event event = new Event ();
 			event.time = xEvent.time;
 			event.x = newX;
 			event.y = newY;
 			event.width = width;
 			event.height = height;
 			sendEvent (SWT.Selection, event);
 			if (ptrGrabResult == OS.GrabSuccess) OS.XUngrabPointer (xDisplay, OS.CurrentTime);
 			if (isDisposed ()) break;

 			if (event.doit) {
 				lastX = event.x;
 				lastY = event.y;
 				if ((style & SWT.SMOOTH) != 0) {
 					setBounds (event.x, event.y, width, height);
 					if (isDisposed ()) break;
 				}
 				int cursorX = event.x, cursorY = event.y;
 				if ((style & SWT.VERTICAL) != 0) {
 					cursorY += height / 2;
 				} else {
 					cursorX += width / 2;
 				}
 				OS.XWarpPointer (xDisplay, OS.None, xWindow, 0, 0, 0, 0, cursorX, cursorY);
 			}
 			break;
 	}

 	return result;
 }
 int XPointerMotion (int w, int client_data, int call_data, int continue_to_dispatch) {
 	int result = super.XPointerMotion (w, client_data, call_data, continue_to_dispatch);
 	if (result != 0) return result;
 	XMotionEvent xEvent = new XMotionEvent ();
 	OS.memmove (xEvent, call_data, XMotionEvent.sizeof);
 	if (!dragging || (xEvent.state & OS.Button1Mask) == 0) return result;
 	short [] x_root = new short [1], y_root = new short [1];
 	OS.XtTranslateCoords (handle, (short) 0, (short) 0, x_root, y_root);
 	int eventX = xEvent.x_root - x_root [0], eventY = xEvent.y_root - y_root [0];
 	int [] argList1 = {OS.XmNx, 0, OS.XmNy, 0, OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0};
 	OS.XtGetValues (handle, argList1, argList1.length / 2);
 	int border = argList1 [9], x = ((short) argList1 [1]) - border, y = ((short) argList1 [3]) - border;
 	int width = argList1 [5] + (border * 2), height = argList1 [7] + (border * 2);
 	int [] argList2 = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0};
 	OS.XtGetValues (parent.handle, argList2, argList2.length / 2);
 	int parentBorder = argList2 [5];
 	int parentWidth = argList2 [1] + (parentBorder * 2);
 	int parentHeight = argList2 [3] + (parentBorder * 2);
 	int newX = lastX, newY = lastY;
 	if ((style & SWT.VERTICAL) != 0) {
 		newX = Math.min (Math.max (0, eventX + x - startX - parentBorder), parentWidth - width);
 	} else {
 		newY = Math.min (Math.max (0, eventY + y - startY - parentBorder), parentHeight - height);
 	}
 	if (newX == lastX && newY == lastY) return result;
 	drawBand (lastX, lastY, width, height);
 	Event event = new Event ();
 	event.time = xEvent.time;
 	event.x = newX;
 	event.y = newY;
 	event.width = width;
 	event.height = height;
 	if ((style & SWT.SMOOTH) == 0) {
 		event.detail = SWT.DRAG;
 	}
 	sendEvent (SWT.Selection, event);
 	if (isDisposed ()) return result;
 	if (event.doit) {
 		lastX = event.x;
 		lastY = event.y;
 	}
 	parent.update (true);
 	drawBand (lastX, lastY, width, height);
 	if ((style & SWT.SMOOTH) != 0) {
 		setBounds (lastX, lastY, width, height);
 		// widget could be disposed at this point
 	}
 	return result;
 }
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2008 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.internal.motif.*;
	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, SMOOTH</dd>
	* <dt><b>Events:</b></dt>
	* <dd>Selection</dd>
	* </dl>
	* <p>
	* Note: Only one of the styles HORIZONTAL and VERTICAL may be specified.
	* </p><p>
	* IMPORTANT: This class is intended to be subclassed <em>only</em>
	* within the SWT implementation.
	* </p>
	*
	* @see <a href="http://www.eclipse.org/swt/snippets/#sash">Sash 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 Sash extends Control {
	boolean dragging;
	int startX, startY, lastX, lastY;
	int cursor;
	private final static int INCREMENT = 1;
	private 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
	* 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#HORIZONTAL
	* @see SWT#VERTICAL
	* @see SWT#SMOOTH
	* @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 the user, 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 receiver 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 when the control is selected by the user
	*
	* @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);
	}
	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 createHandle (int index) {
	state \|= THEME_BACKGROUND;
	int border = (style & SWT.BORDER) != 0 ? 1 : 0;
	int [] argList = {
	OS.XmNborderWidth, border,
	OS.XmNmarginWidth, 0,
	OS.XmNmarginHeight, 0,
	OS.XmNresizePolicy, OS.XmRESIZE_NONE,
	OS.XmNancestorSensitive, 1,
	OS.XmNtraversalOn, 0,
	};
	int parentHandle = parent.handle;
	handle = OS.XmCreateDrawingArea (parentHandle, null, argList, argList.length / 2);
	}
	void drawBand (int x, int y, int width, int height) {
	if ((style & SWT.SMOOTH) != 0) return;
	int display = OS.XtDisplay (parent.handle);
	if (display == 0) return;
	int window = OS.XtWindow (parent.handle);
	if (window == 0) return;
	int foreground = parent.getForegroundPixel ();
	Control control = parent.findBackgroundControl ();
	if (control == null) control = parent;
	int background = control.getBackgroundPixel ();
	int color = foreground ^ background;
	byte [] bits = {-86, 85, -86, 85, -86, 85, -86, 85};
	int stipplePixmap = OS.XCreateBitmapFromData (display, window, bits, 8, 8);
	int gc = OS.XCreateGC (display, window, 0, null);
	OS.XSetForeground (display, gc, color);
	OS.XSetStipple (display, gc, stipplePixmap);
	OS.XSetSubwindowMode (display, gc, OS.IncludeInferiors);
	OS.XSetFillStyle (display, gc, OS.FillStippled);
	OS.XSetFunction (display, gc, OS.GXxor);
	OS.XFillRectangle (display, window, gc, x, y, width, height);
	OS.XFreePixmap (display, stipplePixmap);
	OS.XFreeGC (display, gc);
	}
	void propagateWidget (boolean enabled) {
	int xCursor = enabled && super.cursor != null ? super.cursor.handle : cursor;
	propagateHandle (enabled, handle, xCursor);
	}
	void realizeChildren () {
	super.realizeChildren ();
	int xWindow = OS.XtWindow (handle);
	if (xWindow == 0) return;
	int xDisplay = OS.XtDisplay (handle);
	if (xDisplay == 0) return;
	if ((style & SWT.HORIZONTAL) != 0) {
	cursor = OS.XCreateFontCursor (xDisplay, OS.XC_sb_v_double_arrow);
	} else {
	cursor = OS.XCreateFontCursor (xDisplay, OS.XC_sb_h_double_arrow);
	}
	if (super.cursor == null && isEnabled ()) {
	OS.XDefineCursor (xDisplay, xWindow, cursor);
	OS.XFlush (xDisplay);
	}
	}
	void releaseWidget () {
	super.releaseWidget ();
	if (cursor != 0) {
	int display = OS.XtDisplay (handle);
	if (display != 0) OS.XFreeCursor (display, cursor);
	}
	cursor = 0;
	}
	/**
	* Removes the listener from the collection of listeners who will
	* be notified when the control is selected by the user.
	*
	* @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);
	}
	public void setCursor (Cursor cursor) {
	checkWidget();
	super.setCursor (cursor);
	if (cursor == null && this.cursor != 0) {
	int xWindow = OS.XtWindow (handle);
	if (xWindow == 0) return;
	int xDisplay = OS.XtDisplay (handle);
	if (xDisplay == 0) return;
	OS.XDefineCursor (xDisplay, xWindow, this.cursor);
	OS.XFlush (xDisplay);
	}
	}
	public boolean setFocus () {
	checkWidget();
	return forceFocus ();
	}
	int XButtonPress (int w, int client_data, int call_data, int continue_to_dispatch) {
	int result = super.XButtonPress (w, client_data, call_data, continue_to_dispatch);
	if (result != 0) return result;
	XButtonEvent xEvent = new XButtonEvent ();
	OS.memmove (xEvent, call_data, XButtonEvent.sizeof);
	if (xEvent.button != 1) return result;
	short [] x_root = new short [1], y_root = new short [1];
	OS.XtTranslateCoords (handle, (short) 0, (short) 0, x_root, y_root);
	startX = xEvent.x_root - x_root [0];
	startY = xEvent.y_root - y_root [0];
	int [] argList = {OS.XmNx, 0, OS.XmNy, 0, OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0};
	OS.XtGetValues (handle, argList, argList.length / 2);
	int border = argList [9], width = argList [5] + (border * 2), height = argList [7] + (border * 2);
	lastX = ((short) argList [1]) - border; lastY = ((short) argList [3]) - border;
	Event event = new Event ();
	event.time = xEvent.time;
	event.x = lastX;
	event.y = lastY;
	event.width = width;
	event.height = height;
	if ((style & SWT.SMOOTH) == 0) {
	event.detail = SWT.DRAG;
	}
	sendEvent (SWT.Selection, event);
	if (isDisposed ()) return result;
	if (event.doit) {
	dragging = true;
	lastX = event.x;
	lastY = event.y;
	parent.update (true);
	drawBand (event.x, event.y, width, height);
	if ((style & SWT.SMOOTH) != 0) {
	setBounds (event.x, event.y, width, height);
	// widget could be disposed at this point
	}
	}
	return result;
	}
	int XButtonRelease (int w, int client_data, int call_data, int continue_to_dispatch) {
	int result = super.XButtonRelease (w, client_data, call_data, continue_to_dispatch);
	if (result != 0) return result;
	XButtonEvent xEvent = new XButtonEvent ();
	OS.memmove (xEvent, call_data, XButtonEvent.sizeof);
	if (xEvent.button != 1) return result;
	if (!dragging) return result;
	dragging = false;
	int [] argList = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0};
	OS.XtGetValues (handle, argList, argList.length / 2);
	int border = argList [5];
	int width = argList [1] + (border * 2), height = argList [3] + (border * 2);
	Event event = new Event ();
	event.time = xEvent.time;
	event.x = lastX;
	event.y = lastY;
	event.width = width;
	event.height = height;
	drawBand (lastX, lastY, width, height);
	sendEvent (SWT.Selection, event);
	if (isDisposed ()) return result;
	if (event.doit) {
	if ((style & SWT.SMOOTH) != 0) {
	setBounds (event.x, event.y, width, height);
	// widget could be disposed at this point
	}
	}
	return result;
	}
	int xFocusIn (XFocusChangeEvent xEvent) {
	int result = super.xFocusIn (xEvent);
	if (handle == 0) return result;
	int [] argList = {OS.XmNx, 0, OS.XmNy, 0};
	OS.XtGetValues (handle, argList, argList.length / 2);
	lastX = argList [1];
	lastY = argList [3];
	return result;
	}
	int XKeyPress (int w, int client_data, int call_data, int continue_to_dispatch) {
	int result = super.XKeyPress (w, client_data, call_data, continue_to_dispatch);
	if (result != 0) return result;
	XKeyEvent xEvent = new XKeyEvent ();
	OS.memmove (xEvent, call_data, XKeyEvent.sizeof);
	byte [] buffer = new byte [1];
	int [] keysym = new int [1];
	OS.XLookupString (xEvent, buffer, buffer.length, keysym, null);

	switch (keysym [0]) {
	case OS.XK_Left:
	case OS.XK_Right:
	case OS.XK_Up:
	case OS.XK_Down:
	int xChange = 0, yChange = 0;
	int stepSize = PAGE_INCREMENT;
	if ((xEvent.state & OS.ControlMask) != 0) stepSize = INCREMENT;
	if ((style & SWT.VERTICAL) != 0) {
	if (keysym [0] == OS.XK_Up \|\| keysym [0] == OS.XK_Down) break;
	xChange = keysym [0] == OS.XK_Left ? -stepSize : stepSize;
	} else {
	if (keysym [0] == OS.XK_Left \|\| keysym [0] == OS.XK_Right) break;
	yChange = keysym [0] == OS.XK_Up ? -stepSize : stepSize;
	}

	int [] argList1 = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0};
	OS.XtGetValues (handle, argList1, argList1.length / 2);
	int border = argList1 [5];
	int width = argList1 [1] + (border * 2), height = argList1 [3] + (border * 2);
	int [] argList2 = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0};
	OS.XtGetValues (parent.handle, argList2, argList2.length / 2);
	int parentBorder = argList2 [5];
	int parentWidth = argList2 [1] + (parentBorder * 2);
	int parentHeight = argList2 [3] + (parentBorder * 2);
	int newX = lastX, newY = lastY;
	if ((style & SWT.VERTICAL) != 0) {
	newX = Math.min (Math.max (0, lastX + xChange - parentBorder - startX), parentWidth - width);
	} else {
	newY = Math.min (Math.max (0, lastY + yChange - parentBorder - startY), parentHeight - height);
	}
	if (newX == lastX && newY == lastY) return result;

	/* Ensure that the pointer image does not change */
	int xDisplay = display.xDisplay;
	int xWindow = OS.XtWindow (parent.handle);
	int ptrGrabResult = OS.XGrabPointer (
	xDisplay,
	xWindow,
	1,
	OS.None,
	OS.GrabModeAsync,
	OS.GrabModeAsync,
	OS.None,
	cursor,
	OS.CurrentTime);

	Event event = new Event ();
	event.time = xEvent.time;
	event.x = newX;
	event.y = newY;
	event.width = width;
	event.height = height;
	sendEvent (SWT.Selection, event);
	if (ptrGrabResult == OS.GrabSuccess) OS.XUngrabPointer (xDisplay, OS.CurrentTime);
	if (isDisposed ()) break;

	if (event.doit) {
	lastX = event.x;
	lastY = event.y;
	if ((style & SWT.SMOOTH) != 0) {
	setBounds (event.x, event.y, width, height);
	if (isDisposed ()) break;
	}
	int cursorX = event.x, cursorY = event.y;
	if ((style & SWT.VERTICAL) != 0) {
	cursorY += height / 2;
	} else {
	cursorX += width / 2;
	}
	OS.XWarpPointer (xDisplay, OS.None, xWindow, 0, 0, 0, 0, cursorX, cursorY);
	}
	break;
	}

	return result;
	}
	int XPointerMotion (int w, int client_data, int call_data, int continue_to_dispatch) {
	int result = super.XPointerMotion (w, client_data, call_data, continue_to_dispatch);
	if (result != 0) return result;
	XMotionEvent xEvent = new XMotionEvent ();
	OS.memmove (xEvent, call_data, XMotionEvent.sizeof);
	if (!dragging \|\| (xEvent.state & OS.Button1Mask) == 0) return result;
	short [] x_root = new short [1], y_root = new short [1];
	OS.XtTranslateCoords (handle, (short) 0, (short) 0, x_root, y_root);
	int eventX = xEvent.x_root - x_root [0], eventY = xEvent.y_root - y_root [0];
	int [] argList1 = {OS.XmNx, 0, OS.XmNy, 0, OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0};
	OS.XtGetValues (handle, argList1, argList1.length / 2);
	int border = argList1 [9], x = ((short) argList1 [1]) - border, y = ((short) argList1 [3]) - border;
	int width = argList1 [5] + (border * 2), height = argList1 [7] + (border * 2);
	int [] argList2 = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0};
	OS.XtGetValues (parent.handle, argList2, argList2.length / 2);
	int parentBorder = argList2 [5];
	int parentWidth = argList2 [1] + (parentBorder * 2);
	int parentHeight = argList2 [3] + (parentBorder * 2);
	int newX = lastX, newY = lastY;
	if ((style & SWT.VERTICAL) != 0) {
	newX = Math.min (Math.max (0, eventX + x - startX - parentBorder), parentWidth - width);
	} else {
	newY = Math.min (Math.max (0, eventY + y - startY - parentBorder), parentHeight - height);
	}
	if (newX == lastX && newY == lastY) return result;
	drawBand (lastX, lastY, width, height);
	Event event = new Event ();
	event.time = xEvent.time;
	event.x = newX;
	event.y = newY;
	event.width = width;
	event.height = height;
	if ((style & SWT.SMOOTH) == 0) {
	event.detail = SWT.DRAG;
	}
	sendEvent (SWT.Selection, event);
	if (isDisposed ()) return result;
	if (event.doit) {
	lastX = event.x;
	lastY = event.y;
	}
	parent.update (true);
	drawBand (lastX, lastY, width, height);
	if ((style & SWT.SMOOTH) != 0) {
	setBounds (lastX, lastY, width, height);
	// widget could be disposed at this point
	}
	return result;
	}
	}