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

 /*******************************************************************************
  * 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.internal.carbon.CFRange;
 import org.eclipse.swt.internal.carbon.OS;
 import org.eclipse.swt.internal.carbon.Rect;

 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 <em>not</em> intended to be subclassed.
  * </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 {
 	Cursor sizeCursor;
 	boolean dragging;
 	int lastX, lastY, startX, startY;
 	static final int INCREMENT = 1;
 	static final int PAGE_INCREMENT = 9;
 	static final String [] AX_ATTRIBUTES = {
 		OS.kAXOrientationAttribute,
 		OS.kAXValueAttribute,
 		OS.kAXMaxValueAttribute,
 		OS.kAXMinValueAttribute,
 	};

 /**
  * 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));
 	int cursorStyle = (style & SWT.VERTICAL) != 0 ? SWT.CURSOR_SIZEWE : SWT.CURSOR_SIZENS;
 	sizeCursor = new Cursor (display, cursorStyle);
 }

 /**
  * 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) {
 	/*
 	* Macintosh only supports smooth dragging.
 	*/
 	style |= SWT.SMOOTH;
 	return checkBits (style, SWT.HORIZONTAL, SWT.VERTICAL, 0, 0, 0, 0);
 }

 int callFocusEventHandler (int nextHandler, int theEvent) {
 	return OS.noErr;
 }

 public Point computeSize (int wHint, int hHint, boolean changed) {
 	checkWidget();
 	int width = 0, height = 0;
 	if ((style & SWT.HORIZONTAL) != 0) {
 		width += DEFAULT_WIDTH;  height += 5;
 	} else {
 		width += 5; height += DEFAULT_HEIGHT;
 	}
 	if (wHint != SWT.DEFAULT) width = wHint;
 	if (hHint != SWT.DEFAULT) height = hHint;
 	return new Point (width, height);
 }

 void createHandle () {
 	state |= GRAB | THEME_BACKGROUND;
 	int features = OS.kControlSupportsFocus;
 	int [] outControl = new int [1];
 	int window = OS.GetControlOwner (parent.handle);
 	OS.CreateUserPaneControl (window, null, features, outControl);
 	if (outControl [0] == 0) error (SWT.ERROR_NO_HANDLES);
 	handle = outControl [0];
 }

 void drawBackground (int control, int context) {
 	fillBackground (control, context, null);
 }

 String [] getAxAttributes () {
 	return AX_ATTRIBUTES;
 }

 int kEventAccessibleGetNamedAttribute (int nextHandler, int theEvent, int userData) {
 	int code = OS.eventNotHandledErr;
 	int [] stringRef = new int [1];
 	OS.GetEventParameter (theEvent, OS.kEventParamAccessibleAttributeName, OS.typeCFStringRef, null, 4, null, stringRef);
 	int length = 0;
 	if (stringRef [0] != 0) length = OS.CFStringGetLength (stringRef [0]);
 	char [] buffer = new char [length];
 	CFRange range = new CFRange ();
 	range.length = length;
 	OS.CFStringGetCharacters (stringRef [0], range, buffer);
 	String attributeName = new String(buffer);
 	if (attributeName.equals (OS.kAXRoleAttribute) || attributeName.equals (OS.kAXRoleDescriptionAttribute)) {
 		String roleText = OS.kAXSplitterRole;
 		buffer = new char [roleText.length ()];
 		roleText.getChars (0, buffer.length, buffer, 0);
 		stringRef [0] = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, buffer.length);
 		if (stringRef [0] != 0) {
 			if (attributeName.equals (OS.kAXRoleAttribute)) {
 				OS.SetEventParameter (theEvent, OS.kEventParamAccessibleAttributeValue, OS.typeCFStringRef, 4, stringRef);
 			} else { // kAXRoleDescriptionAttribute
 				int stringRef2 = OS.HICopyAccessibilityRoleDescription (stringRef [0], 0);
 				OS.SetEventParameter (theEvent, OS.kEventParamAccessibleAttributeValue, OS.typeCFStringRef, 4, new int [] {stringRef2});
 				OS.CFRelease(stringRef2);
 			}
 			OS.CFRelease(stringRef [0]);
 			code = OS.noErr;
 		}
 	} else if (attributeName.equals (OS.kAXOrientationAttribute)) {
 		String orientation = (style & SWT.VERTICAL) != 0 ? OS.kAXVerticalOrientationValue : OS.kAXHorizontalOrientationValue;
 		buffer = new char [orientation.length ()];
 		orientation.getChars (0, buffer.length, buffer, 0);
 		stringRef [0] = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, buffer.length);
 		if (stringRef [0] != 0) {
 			OS.SetEventParameter (theEvent, OS.kEventParamAccessibleAttributeValue, OS.typeCFStringRef, 4, stringRef);
 			OS.CFRelease(stringRef [0]);
 			code = OS.noErr;
 		}
 	} else if (attributeName.equals (OS.kAXValueAttribute)) {
 		Point location = getLocation();
 		int value = (style & SWT.VERTICAL) != 0 ? location.x : location.y;
 		OS.SetEventParameter (theEvent, OS.kEventParamAccessibleAttributeValue, OS.typeSInt32, 4, new int [] {value});
 		code = OS.noErr;
 	} else if (attributeName.equals (OS.kAXMaxValueAttribute)) {
 		Rect parentBounds = new Rect ();
 		OS.GetControlBounds (parent.handle, parentBounds);
 		int maxValue = (style & SWT.VERTICAL) != 0 ?
 				parentBounds.right - parentBounds.left :
 				parentBounds.bottom - parentBounds.top;
 		OS.SetEventParameter (theEvent, OS.kEventParamAccessibleAttributeValue, OS.typeSInt32, 4, new int [] {maxValue});
 		code = OS.noErr;
 	} else if (attributeName.equals (OS.kAXMinValueAttribute)) {
 		OS.SetEventParameter (theEvent, OS.kEventParamAccessibleAttributeValue, OS.typeSInt32, 4, new int [] {0});
 		code = OS.noErr;
 	}
 	if (accessible != null) {
 		code = accessible.internal_kEventAccessibleGetNamedAttribute (nextHandler, theEvent, code);
 	}
 	return code;
 }

 int kEventControlClick (int nextHandler, int theEvent, int userData) {
 	int result = super.kEventControlClick (nextHandler, theEvent, userData);
 	if (result == OS.noErr) return result;
 	if (!isEnabled ()) return OS.noErr;
 	return result;
 }

 int kEventControlGetFocusPart (int nextHandler, int theEvent, int userData) {
 	return OS.noErr;
 }

 int kEventControlSetCursor (int nextHandler, int theEvent, int userData) {
 	int result = super.kEventControlSetCursor (nextHandler, theEvent, userData);
 	if (result == OS.noErr) return result;
 	display.setCursor (sizeCursor.handle);
 	return OS.noErr;
 }

 int kEventControlSetFocusPart (int nextHandler, int theEvent, int userData) {
 	int result = super.kEventControlSetFocusPart (nextHandler, theEvent, userData);
 	if (result == OS.noErr) {
 		Point location = getLocation();
 		lastX = location.x;
 		lastY = location.y;
 	}
 	return result;
 }

 int kEventUnicodeKeyPressed (int nextHandler, int theEvent, int userData) {
 	int result = super.kEventUnicodeKeyPressed (nextHandler, theEvent, userData);
 	if (result == OS.noErr) return result;
 	int [] keyboardEvent = new int [1];
 	OS.GetEventParameter (theEvent, OS.kEventParamTextInputSendKeyboardEvent, OS.typeEventRef, null, keyboardEvent.length * 4, null, keyboardEvent);
 	int [] keyCode = new int [1];
 	OS.GetEventParameter (keyboardEvent [0], OS.kEventParamKeyCode, OS.typeUInt32, null, keyCode.length * 4, null, keyCode);
 	switch (keyCode [0]) {
 		case 126: /* Up arrow */
 		case 123: /* Left arrow */
 		case 125: /* Down arrow */
 		case 124: /* Right arrow */ {
 			int xChange = 0, yChange = 0;
 			int stepSize = PAGE_INCREMENT;
 			int [] modifiers = new int [1];
 			OS.GetEventParameter (theEvent, OS.kEventParamKeyModifiers, OS.typeUInt32, null, 4, null, modifiers);
 			if ((modifiers [0] & OS.controlKey) != 0) stepSize = INCREMENT;
 			if ((style & SWT.VERTICAL) != 0) {
 				if (keyCode [0] == 126 || keyCode [0] == 125) break;
 				xChange = keyCode [0] == 123 ? -stepSize : stepSize;
 			} else {
 				if (keyCode [0] == 123 || keyCode [0] == 124) break;
 				yChange = keyCode [0] == 126 ? -stepSize : stepSize;
 			}

 			Rectangle bounds = getBounds ();
 			int width = bounds.width, height = bounds.height;
 			Rectangle parentBounds = parent.getBounds ();
 			int parentWidth = parentBounds.width;
 			int parentHeight = parentBounds.height;
 			int newX = lastX, newY = lastY;
 			if ((style & SWT.VERTICAL) != 0) {
 				newX = Math.min (Math.max (0, lastX + xChange), parentWidth - width);
 			} else {
 				newY = Math.min (Math.max (0, lastY + yChange), parentHeight - height);
 			}
 			if (newX == lastX && newY == lastY) return result;
 			Event event = new Event ();
 			event.x = newX;
 			event.y = newY;
 			event.width = width;
 			event.height = height;
 			sendSelectionEvent (SWT.Selection, event, true);
 			if (isDisposed ()) break;
 			if (event.doit) {
 				setBounds (event.x, event.y, width, height);
 				if (isDisposed ()) break;
 				lastX = event.x;
 				lastY = event.y;
 				if (isDisposed ()) return result;
 				int cursorX = event.x, cursorY = event.y;
 				if ((style & SWT.VERTICAL) != 0) {
 					cursorY += height / 2;
 				} else {
 					cursorX += width / 2;
 				}
 				display.setCursorLocation (parent.toDisplay (cursorX, cursorY));
 			}
 			break;
 		}
 	}

 	return result;
 }

 void releaseWidget () {
 	super.releaseWidget ();
 	if (sizeCursor != null) sizeCursor.dispose ();
 	sizeCursor = null;
 }

 /**
  * 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);
 }

 boolean sendMouseEvent (int type, short button, int count, int detail, boolean send, int chord, short x, short y, int modifiers) {
 	boolean result = super.sendMouseEvent (type, button, count, detail, send, chord, x, y, modifiers);
 	Rect rect = new Rect ();
 	OS.GetControlBounds (handle, rect);
 	int controlX = rect.left;
 	int controlY = rect.top;
 	int width = rect.right - rect.left;
 	int height = rect.bottom - rect.top;
 	OS.GetControlBounds (parent.handle, rect);
 	int parentWidth = rect.right - rect.left;
 	int parentHeight = rect.bottom - rect.top;
 	switch (type) {
 		case SWT.MouseDown:
 			if (button != 1 || count != 1) break;
 			startX = x;
 			startY = y;
 			Event event = new Event ();
 			event.x = controlX;
 			event.y = controlY;
 			event.width = width;
 			event.height = height;
 			sendSelectionEvent (SWT.Selection, event, true);
 			if (isDisposed ()) return result;
 			if (event.doit) {
 				lastX = event.x;
 				lastY = event.y;
 				dragging = true;
 				setBounds (event.x, event.y, width, height);
 			}
 			break;
 		case SWT.MouseUp:
 			if (!dragging) break;
 			dragging = false;
 			event = new Event ();
 			event.x = lastX;
 			event.y = lastY;
 			event.width = width;
 			event.height = height;
 			sendSelectionEvent (SWT.Selection, event, true);
 			if (isDisposed ()) return result;
 			if (event.doit) {
 				setBounds (event.x, event.y, width, height);
 			}
 			break;
 		case SWT.MouseMove:
 			if (!dragging) break;
 			int newX = lastX, newY = lastY;
 			if ((style & SWT.VERTICAL) != 0) {
 				newX = Math.min (Math.max (0, x + controlX - startX), parentWidth - width);
 			} else {
 				newY = Math.min (Math.max (0, y + controlY - startY), parentHeight - height);
 			}
 			if (newX == lastX && newY == lastY) return result;
 			event = new Event ();
 			event.x = newX;
 			event.y = newY;
 			event.width = width;
 			event.height = height;
 			sendSelectionEvent (SWT.Selection, event, true);
 			if (isDisposed ()) return result;
 			if (event.doit) {
 				lastX = event.x;
 				lastY = event.y;
 				setBounds (event.x, event.y, width, height);
 			}
 			break;
 	}
 	return result;
 }

 int traversalCode (int key, int theEvent) {
 	return 0;
 }

 }
	/*******************************************************************************
	* 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.internal.carbon.CFRange;
	import org.eclipse.swt.internal.carbon.OS;
	import org.eclipse.swt.internal.carbon.Rect;

	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 <em>not</em> intended to be subclassed.
	* </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 {
	Cursor sizeCursor;
	boolean dragging;
	int lastX, lastY, startX, startY;
	static final int INCREMENT = 1;
	static final int PAGE_INCREMENT = 9;
	static final String [] AX_ATTRIBUTES = {
	OS.kAXOrientationAttribute,
	OS.kAXValueAttribute,
	OS.kAXMaxValueAttribute,
	OS.kAXMinValueAttribute,
	};

	/**
	* 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));
	int cursorStyle = (style & SWT.VERTICAL) != 0 ? SWT.CURSOR_SIZEWE : SWT.CURSOR_SIZENS;
	sizeCursor = new Cursor (display, cursorStyle);
	}

	/**
	* 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) {
	/*
	* Macintosh only supports smooth dragging.
	*/
	style \|= SWT.SMOOTH;
	return checkBits (style, SWT.HORIZONTAL, SWT.VERTICAL, 0, 0, 0, 0);
	}

	int callFocusEventHandler (int nextHandler, int theEvent) {
	return OS.noErr;
	}

	public Point computeSize (int wHint, int hHint, boolean changed) {
	checkWidget();
	int width = 0, height = 0;
	if ((style & SWT.HORIZONTAL) != 0) {
	width += DEFAULT_WIDTH; height += 5;
	} else {
	width += 5; height += DEFAULT_HEIGHT;
	}
	if (wHint != SWT.DEFAULT) width = wHint;
	if (hHint != SWT.DEFAULT) height = hHint;
	return new Point (width, height);
	}

	void createHandle () {
	state \|= GRAB \| THEME_BACKGROUND;
	int features = OS.kControlSupportsFocus;
	int [] outControl = new int [1];
	int window = OS.GetControlOwner (parent.handle);
	OS.CreateUserPaneControl (window, null, features, outControl);
	if (outControl [0] == 0) error (SWT.ERROR_NO_HANDLES);
	handle = outControl [0];
	}

	void drawBackground (int control, int context) {
	fillBackground (control, context, null);
	}

	String [] getAxAttributes () {
	return AX_ATTRIBUTES;
	}

	int kEventAccessibleGetNamedAttribute (int nextHandler, int theEvent, int userData) {
	int code = OS.eventNotHandledErr;
	int [] stringRef = new int [1];
	OS.GetEventParameter (theEvent, OS.kEventParamAccessibleAttributeName, OS.typeCFStringRef, null, 4, null, stringRef);
	int length = 0;
	if (stringRef [0] != 0) length = OS.CFStringGetLength (stringRef [0]);
	char [] buffer = new char [length];
	CFRange range = new CFRange ();
	range.length = length;
	OS.CFStringGetCharacters (stringRef [0], range, buffer);
	String attributeName = new String(buffer);
	if (attributeName.equals (OS.kAXRoleAttribute) \|\| attributeName.equals (OS.kAXRoleDescriptionAttribute)) {
	String roleText = OS.kAXSplitterRole;
	buffer = new char [roleText.length ()];
	roleText.getChars (0, buffer.length, buffer, 0);
	stringRef [0] = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, buffer.length);
	if (stringRef [0] != 0) {
	if (attributeName.equals (OS.kAXRoleAttribute)) {
	OS.SetEventParameter (theEvent, OS.kEventParamAccessibleAttributeValue, OS.typeCFStringRef, 4, stringRef);
	} else { // kAXRoleDescriptionAttribute
	int stringRef2 = OS.HICopyAccessibilityRoleDescription (stringRef [0], 0);
	OS.SetEventParameter (theEvent, OS.kEventParamAccessibleAttributeValue, OS.typeCFStringRef, 4, new int [] {stringRef2});
	OS.CFRelease(stringRef2);
	}
	OS.CFRelease(stringRef [0]);
	code = OS.noErr;
	}
	} else if (attributeName.equals (OS.kAXOrientationAttribute)) {
	String orientation = (style & SWT.VERTICAL) != 0 ? OS.kAXVerticalOrientationValue : OS.kAXHorizontalOrientationValue;
	buffer = new char [orientation.length ()];
	orientation.getChars (0, buffer.length, buffer, 0);
	stringRef [0] = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, buffer.length);
	if (stringRef [0] != 0) {
	OS.SetEventParameter (theEvent, OS.kEventParamAccessibleAttributeValue, OS.typeCFStringRef, 4, stringRef);
	OS.CFRelease(stringRef [0]);
	code = OS.noErr;
	}
	} else if (attributeName.equals (OS.kAXValueAttribute)) {
	Point location = getLocation();
	int value = (style & SWT.VERTICAL) != 0 ? location.x : location.y;
	OS.SetEventParameter (theEvent, OS.kEventParamAccessibleAttributeValue, OS.typeSInt32, 4, new int [] {value});
	code = OS.noErr;
	} else if (attributeName.equals (OS.kAXMaxValueAttribute)) {
	Rect parentBounds = new Rect ();
	OS.GetControlBounds (parent.handle, parentBounds);
	int maxValue = (style & SWT.VERTICAL) != 0 ?
	parentBounds.right - parentBounds.left :
	parentBounds.bottom - parentBounds.top;
	OS.SetEventParameter (theEvent, OS.kEventParamAccessibleAttributeValue, OS.typeSInt32, 4, new int [] {maxValue});
	code = OS.noErr;
	} else if (attributeName.equals (OS.kAXMinValueAttribute)) {
	OS.SetEventParameter (theEvent, OS.kEventParamAccessibleAttributeValue, OS.typeSInt32, 4, new int [] {0});
	code = OS.noErr;
	}
	if (accessible != null) {
	code = accessible.internal_kEventAccessibleGetNamedAttribute (nextHandler, theEvent, code);
	}
	return code;
	}

	int kEventControlClick (int nextHandler, int theEvent, int userData) {
	int result = super.kEventControlClick (nextHandler, theEvent, userData);
	if (result == OS.noErr) return result;
	if (!isEnabled ()) return OS.noErr;
	return result;
	}

	int kEventControlGetFocusPart (int nextHandler, int theEvent, int userData) {
	return OS.noErr;
	}

	int kEventControlSetCursor (int nextHandler, int theEvent, int userData) {
	int result = super.kEventControlSetCursor (nextHandler, theEvent, userData);
	if (result == OS.noErr) return result;
	display.setCursor (sizeCursor.handle);
	return OS.noErr;
	}

	int kEventControlSetFocusPart (int nextHandler, int theEvent, int userData) {
	int result = super.kEventControlSetFocusPart (nextHandler, theEvent, userData);
	if (result == OS.noErr) {
	Point location = getLocation();
	lastX = location.x;
	lastY = location.y;
	}
	return result;
	}

	int kEventUnicodeKeyPressed (int nextHandler, int theEvent, int userData) {
	int result = super.kEventUnicodeKeyPressed (nextHandler, theEvent, userData);
	if (result == OS.noErr) return result;
	int [] keyboardEvent = new int [1];
	OS.GetEventParameter (theEvent, OS.kEventParamTextInputSendKeyboardEvent, OS.typeEventRef, null, keyboardEvent.length * 4, null, keyboardEvent);
	int [] keyCode = new int [1];
	OS.GetEventParameter (keyboardEvent [0], OS.kEventParamKeyCode, OS.typeUInt32, null, keyCode.length * 4, null, keyCode);
	switch (keyCode [0]) {
	case 126: /* Up arrow */
	case 123: /* Left arrow */
	case 125: /* Down arrow */
	case 124: /* Right arrow */ {
	int xChange = 0, yChange = 0;
	int stepSize = PAGE_INCREMENT;
	int [] modifiers = new int [1];
	OS.GetEventParameter (theEvent, OS.kEventParamKeyModifiers, OS.typeUInt32, null, 4, null, modifiers);
	if ((modifiers [0] & OS.controlKey) != 0) stepSize = INCREMENT;
	if ((style & SWT.VERTICAL) != 0) {
	if (keyCode [0] == 126 \|\| keyCode [0] == 125) break;
	xChange = keyCode [0] == 123 ? -stepSize : stepSize;
	} else {
	if (keyCode [0] == 123 \|\| keyCode [0] == 124) break;
	yChange = keyCode [0] == 126 ? -stepSize : stepSize;
	}

	Rectangle bounds = getBounds ();
	int width = bounds.width, height = bounds.height;
	Rectangle parentBounds = parent.getBounds ();
	int parentWidth = parentBounds.width;
	int parentHeight = parentBounds.height;
	int newX = lastX, newY = lastY;
	if ((style & SWT.VERTICAL) != 0) {
	newX = Math.min (Math.max (0, lastX + xChange), parentWidth - width);
	} else {
	newY = Math.min (Math.max (0, lastY + yChange), parentHeight - height);
	}
	if (newX == lastX && newY == lastY) return result;
	Event event = new Event ();
	event.x = newX;
	event.y = newY;
	event.width = width;
	event.height = height;
	sendSelectionEvent (SWT.Selection, event, true);
	if (isDisposed ()) break;
	if (event.doit) {
	setBounds (event.x, event.y, width, height);
	if (isDisposed ()) break;
	lastX = event.x;
	lastY = event.y;
	if (isDisposed ()) return result;
	int cursorX = event.x, cursorY = event.y;
	if ((style & SWT.VERTICAL) != 0) {
	cursorY += height / 2;
	} else {
	cursorX += width / 2;
	}
	display.setCursorLocation (parent.toDisplay (cursorX, cursorY));
	}
	break;
	}
	}

	return result;
	}

	void releaseWidget () {
	super.releaseWidget ();
	if (sizeCursor != null) sizeCursor.dispose ();
	sizeCursor = null;
	}

	/**
	* 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);
	}

	boolean sendMouseEvent (int type, short button, int count, int detail, boolean send, int chord, short x, short y, int modifiers) {
	boolean result = super.sendMouseEvent (type, button, count, detail, send, chord, x, y, modifiers);
	Rect rect = new Rect ();
	OS.GetControlBounds (handle, rect);
	int controlX = rect.left;
	int controlY = rect.top;
	int width = rect.right - rect.left;
	int height = rect.bottom - rect.top;
	OS.GetControlBounds (parent.handle, rect);
	int parentWidth = rect.right - rect.left;
	int parentHeight = rect.bottom - rect.top;
	switch (type) {
	case SWT.MouseDown:
	if (button != 1 \|\| count != 1) break;
	startX = x;
	startY = y;
	Event event = new Event ();
	event.x = controlX;
	event.y = controlY;
	event.width = width;
	event.height = height;
	sendSelectionEvent (SWT.Selection, event, true);
	if (isDisposed ()) return result;
	if (event.doit) {
	lastX = event.x;
	lastY = event.y;
	dragging = true;
	setBounds (event.x, event.y, width, height);
	}
	break;
	case SWT.MouseUp:
	if (!dragging) break;
	dragging = false;
	event = new Event ();
	event.x = lastX;
	event.y = lastY;
	event.width = width;
	event.height = height;
	sendSelectionEvent (SWT.Selection, event, true);
	if (isDisposed ()) return result;
	if (event.doit) {
	setBounds (event.x, event.y, width, height);
	}
	break;
	case SWT.MouseMove:
	if (!dragging) break;
	int newX = lastX, newY = lastY;
	if ((style & SWT.VERTICAL) != 0) {
	newX = Math.min (Math.max (0, x + controlX - startX), parentWidth - width);
	} else {
	newY = Math.min (Math.max (0, y + controlY - startY), parentHeight - height);
	}
	if (newX == lastX && newY == lastY) return result;
	event = new Event ();
	event.x = newX;
	event.y = newY;
	event.width = width;
	event.height = height;
	sendSelectionEvent (SWT.Selection, event, true);
	if (isDisposed ()) return result;
	if (event.doit) {
	lastX = event.x;
	lastY = event.y;
	setBounds (event.x, event.y, width, height);
	}
	break;
	}
	return result;
	}

	int traversalCode (int key, int theEvent) {
	return 0;
	}

	}