bundles/org.eclipse.swt/Eclipse SWT/cocoa/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.*;
 import org.eclipse.swt.accessibility.*;
 import org.eclipse.swt.events.*;
 import org.eclipse.swt.graphics.*;
 import org.eclipse.swt.internal.cocoa.*;

 /**
  * 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 {
 	Cursor sizeCursor;
 	boolean dragging;
 	int lastX, lastY, startX, startY;
 	private final static int INCREMENT = 1;
 	private final static int PAGE_INCREMENT = 9;
 	NSArray accessibilityAttributes = null;

 /**
  * 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);
 }

 int /*long*/ accessibilityAttributeNames(int /*long*/ id, int /*long*/ sel) {
 	if (accessibilityAttributes == null) {
 		NSMutableArray ourAttributes = NSMutableArray.arrayWithCapacity(10);
 		ourAttributes.addObject(OS.NSAccessibilityRoleAttribute);
 		ourAttributes.addObject(OS.NSAccessibilityRoleDescriptionAttribute);
 		ourAttributes.addObject(OS.NSAccessibilityParentAttribute);
 		ourAttributes.addObject(OS.NSAccessibilityPositionAttribute);
 		ourAttributes.addObject(OS.NSAccessibilitySizeAttribute);
 		ourAttributes.addObject(OS.NSAccessibilityWindowAttribute);
 		ourAttributes.addObject(OS.NSAccessibilityTopLevelUIElementAttribute);
 		ourAttributes.addObject(OS.NSAccessibilityFocusedAttribute);
 		ourAttributes.addObject(OS.NSAccessibilityValueAttribute);
 		ourAttributes.addObject(OS.NSAccessibilityMaxValueAttribute);
 		ourAttributes.addObject(OS.NSAccessibilityMinValueAttribute);
 		// The accessibility documentation says that these next two are optional, but the
 		// Accessibility Verifier says they are required.
 		ourAttributes.addObject(OS.NSAccessibilityNextContentsAttribute);
 		ourAttributes.addObject(OS.NSAccessibilityPreviousContentsAttribute);
 		ourAttributes.addObject(OS.NSAccessibilityOrientationAttribute);

 		if (accessible != null) {
 			// See if the accessible will override or augment the standard list.
 			// Help, title, and description can be overridden.
 			NSMutableArray extraAttributes = NSMutableArray.arrayWithCapacity(3);
 			extraAttributes.addObject(OS.NSAccessibilityHelpAttribute);
 			extraAttributes.addObject(OS.NSAccessibilityDescriptionAttribute);
 			extraAttributes.addObject(OS.NSAccessibilityTitleAttribute);

 			for (int i = (int)/*64*/extraAttributes.count() - 1; i >= 0; i--) {
 				NSString attribute = new NSString(extraAttributes.objectAtIndex(i).id);
 				if (accessible.internal_accessibilityAttributeValue(attribute, ACC.CHILDID_SELF) != null) {
 					ourAttributes.addObject(extraAttributes.objectAtIndex(i));
 				}
 			}
 		}

 		accessibilityAttributes = ourAttributes;
 		accessibilityAttributes.retain();
 	}

 	return accessibilityAttributes.id;
 }

 int /*long*/ accessibilityAttributeValue(int /*long*/ id, int /*long*/ sel, int /*long*/ arg0) {
 	int /*long*/ returnValue = 0;
 	NSString attributeName = new NSString(arg0);

 	if (accessible != null) {
 		id returnObject = accessible.internal_accessibilityAttributeValue(attributeName, ACC.CHILDID_SELF);

 		if (returnObject != null) returnValue = returnObject.id;
 	}

 	if (returnValue != 0) return returnValue;

 	if (attributeName.isEqualToString (OS.NSAccessibilityRoleAttribute) || attributeName.isEqualToString (OS.NSAccessibilityRoleDescriptionAttribute)) {
 		NSString roleText = OS.NSAccessibilitySplitterRole;

 		if (attributeName.isEqualToString (OS.NSAccessibilityRoleAttribute)) {
 			return roleText.id;
 		} else { // NSAccessibilityRoleDescriptionAttribute
 			return OS.NSAccessibilityRoleDescription (roleText.id, 0);
 		}
 	} else if (attributeName.isEqualToString (OS.NSAccessibilityEnabledAttribute)) {
 		return NSNumber.numberWithBool(isEnabled()).id;
 	} else if (attributeName.isEqualToString (OS.NSAccessibilityOrientationAttribute)) {
 		NSString orientation = (style & SWT.VERTICAL) != 0 ? OS.NSAccessibilityVerticalOrientationValue : OS.NSAccessibilityHorizontalOrientationValue;
 		return orientation.id;
 	} else if (attributeName.isEqualToString (OS.NSAccessibilityValueAttribute)) {
 		Point location = getLocation();
 		int value = (style & SWT.VERTICAL) != 0 ? location.x : location.y;
 		return NSNumber.numberWithInt(value).id;
 	} else if (attributeName.isEqualToString (OS.NSAccessibilityMaxValueAttribute)) {
 		NSRect parentBounds = view.bounds();
 		float /*double*/ maxValue = (style & SWT.VERTICAL) != 0 ?
 				parentBounds.width :
 				parentBounds.height;
 		return NSNumber.numberWithInt((int)maxValue).id;
 	} else if (attributeName.isEqualToString (OS.NSAccessibilityMinValueAttribute)) {
 		return NSNumber.numberWithInt(0).id;
 	} else if (attributeName.isEqualToString (OS.NSAccessibilityNextContentsAttribute)) {
 		Control[] children =  parent._getChildren();
 		Control nextView = null;
 		for (int i = 0; i < children.length; i++) {
 			if (children[i] == this) {
 				if (i < children.length - 1) {
 					nextView = children[i + 1];
 					break;
 				}
 			}
 		}

 		if (nextView != null)
 			return NSArray.arrayWithObject(nextView.view).id;
 		else
 			return NSArray.array().id;
 	} else if (attributeName.isEqualToString (OS.NSAccessibilityPreviousContentsAttribute)) {
 		Control[] children =  parent._getChildren();
 		Control nextView = null;
 		for (int i = 0; i < children.length; i++) {
 			if (children[i] == this) {
 				if (i > 0) {
 					nextView = children[i - 1];
 					break;
 				}
 			}
 		}

 		if (nextView != null)
 			return NSArray.arrayWithObject(nextView.view).id;
 		else
 			return NSArray.array().id;
 	}

 	return super.accessibilityAttributeValue(id, sel, arg0);
 }

 boolean accessibilityIsIgnored(int /*long*/ id, int /*long*/ sel) {
 	return false;
 }

 /**
  * 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);
 }

 boolean becomeFirstResponder (int /*long*/ id, int /*long*/ sel) {
 	boolean result = super.becomeFirstResponder(id, sel);
 	NSRect frame = view.frame();
 	lastX = (int)frame.x;
 	lastY = (int)frame.y;
 	return result;
 }

 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 |= THEME_BACKGROUND;
 	NSView widget = (NSView)new SWTView().alloc();
 	widget.init ();
 	view = widget;
 }

 void drawBackground (int /*long*/ id, NSGraphicsContext context, NSRect rect) {
 	if (id != view.id) return;
 	fillBackground (view, context, rect, -1);
 }

 Cursor findCursor () {
 	Cursor cursor = super.findCursor ();
 	if (cursor == null)	{
 		int cursorType = (style & SWT.HORIZONTAL) != 0 ? SWT.CURSOR_SIZENS : SWT.CURSOR_SIZEWE;
 		cursor = display.getSystemCursor (cursorType);
 	}
 	return cursor;
 }

 boolean sendKeyEvent(NSEvent nsEvent, int type) {
 	super.sendKeyEvent (nsEvent, type);
 	if (type == SWT.KeyDown) {
 		int keyCode = nsEvent.keyCode();
 		switch (keyCode) {
 			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 /*long*/ modifiers = nsEvent.modifierFlags();
 				if ((modifiers & OS.NSControlKeyMask) != 0) stepSize = INCREMENT;
 				if ((style & SWT.VERTICAL) != 0) {
 					if (keyCode == 126 || keyCode == 125) break;
 					xChange = keyCode == 123 ? -stepSize : stepSize;
 				} else {
 					if (keyCode == 123 || keyCode  == 124) break;
 					yChange = keyCode == 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 true;
 				Event event = new Event ();
 				event.x = newX;
 				event.y = newY;
 				event.width = width;
 				event.height = height;
 				sendEvent (SWT.Selection, event);
 				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 false;
 					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 true;
 }

 void mouseDown(int /*long*/ id, int /*long*/ sel, int /*long*/ theEvent) {
 	//TODO use sendMouseEvent
 	super.mouseDown(id, sel, theEvent);
 	if (isDisposed()) return;
 	NSEvent nsEvent = new NSEvent(theEvent);
 	if (nsEvent.clickCount() != 1) return;
 	NSPoint location = nsEvent.locationInWindow();
 	NSPoint point = view.convertPoint_fromView_(location, null);
 	startX = (int)point.x;
 	startY = (int)point.y;
 	NSRect frame = view.frame();
 	Event event = new Event ();
 	event.x = (int)frame.x;
 	event.y = (int)frame.y;
 	event.width = (int)frame.width;
 	event.height = (int)frame.height;
 	sendEvent (SWT.Selection, event);
 	if (isDisposed ()) return;
 	if (event.doit) {
 		lastX = event.x;
 		lastY = event.y;
 		dragging = true;
 		setLocation(event.x, event.y);
 	}
 }

 boolean mouseEvent (int /*long*/ id, int /*long*/ sel, int /*long*/ theEvent, int type) {
 	super.mouseEvent (id, sel, theEvent, type);
 	return new NSEvent (theEvent).type () != OS.NSLeftMouseDown;
 }

 void mouseDragged(int /*long*/ id, int /*long*/ sel, int /*long*/ theEvent) {
 	//TODO use sendMouseEvent
 	super.mouseDragged(id, sel, theEvent);
 	if (isDisposed()) return;
 	if (!dragging) return;
 	NSEvent nsEvent = new NSEvent(theEvent);
 	NSPoint location = nsEvent.locationInWindow();
 	NSPoint point = view.convertPoint_fromView_(location, null);
 	NSRect frame = view.frame();
 	NSRect parentFrame = parent.topView().frame();
 	int newX = lastX, newY = lastY;
 	if ((style & SWT.VERTICAL) != 0) {
 		newX = Math.min (Math.max (0, (int)(point.x + frame.x - startX)), (int)(parentFrame.width - frame.width));
 	} else {
 		newY = Math.min (Math.max (0, (int)(point.y + frame.y - startY)), (int)(parentFrame.height - frame.height));
 	}
 	if (newX == lastX && newY == lastY) return;
 	Event event = new Event ();
 	event.x = newX;
 	event.y = newY;
 	event.width = (int)frame.width;
 	event.height = (int)frame.height;
 	sendEvent (SWT.Selection, event);
 	if (isDisposed ()) return;
 	if (event.doit) {
 		lastX = event.x;
 		lastY = event.y;
 		setBounds (event.x, event.y, (int)frame.width, (int)frame.height);
 	}
 }

 void mouseUp(int /*long*/ id, int /*long*/ sel, int /*long*/ theEvent) {
 	//TODO use sendMouseEvent
 	super.mouseUp(id, sel, theEvent);
 	if (isDisposed()) return;
 	if (!dragging) return;
 	dragging = false;
 	NSRect frame = view.frame();
 	Event event = new Event ();
 	event.x = lastX;
 	event.y = lastY;
 	event.width = (int)frame.width;
 	event.height = (int)frame.height;
 	sendEvent (SWT.Selection, event);
 	if (isDisposed ()) return;
 	if (event.doit) {
 		setBounds (event.x, event.y, (int)frame.width, (int)frame.height);
 	}
 }

 void releaseHandle () {
 	super.releaseHandle ();
 	if (accessibilityAttributes != null) accessibilityAttributes.release();
 	accessibilityAttributes = null;
 }

 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);
 }

 void superKeyDown (int /*long*/ id, int /*long*/ sel, int /*long*/ theEvent) {
 }

 void superKeyUp (int /*long*/ id, int /*long*/ sel, int /*long*/ theEvent) {
 }

 int traversalCode (int key, NSEvent 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.*;
	import org.eclipse.swt.accessibility.*;
	import org.eclipse.swt.events.*;
	import org.eclipse.swt.graphics.*;
	import org.eclipse.swt.internal.cocoa.*;

	/**
	* 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 {
	Cursor sizeCursor;
	boolean dragging;
	int lastX, lastY, startX, startY;
	private final static int INCREMENT = 1;
	private final static int PAGE_INCREMENT = 9;
	NSArray accessibilityAttributes = null;

	/**
	* 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);
	}

	int /long/ accessibilityAttributeNames(int /long/ id, int /long/ sel) {
	if (accessibilityAttributes == null) {
	NSMutableArray ourAttributes = NSMutableArray.arrayWithCapacity(10);
	ourAttributes.addObject(OS.NSAccessibilityRoleAttribute);
	ourAttributes.addObject(OS.NSAccessibilityRoleDescriptionAttribute);
	ourAttributes.addObject(OS.NSAccessibilityParentAttribute);
	ourAttributes.addObject(OS.NSAccessibilityPositionAttribute);
	ourAttributes.addObject(OS.NSAccessibilitySizeAttribute);
	ourAttributes.addObject(OS.NSAccessibilityWindowAttribute);
	ourAttributes.addObject(OS.NSAccessibilityTopLevelUIElementAttribute);
	ourAttributes.addObject(OS.NSAccessibilityFocusedAttribute);
	ourAttributes.addObject(OS.NSAccessibilityValueAttribute);
	ourAttributes.addObject(OS.NSAccessibilityMaxValueAttribute);
	ourAttributes.addObject(OS.NSAccessibilityMinValueAttribute);
	// The accessibility documentation says that these next two are optional, but the
	// Accessibility Verifier says they are required.
	ourAttributes.addObject(OS.NSAccessibilityNextContentsAttribute);
	ourAttributes.addObject(OS.NSAccessibilityPreviousContentsAttribute);
	ourAttributes.addObject(OS.NSAccessibilityOrientationAttribute);

	if (accessible != null) {
	// See if the accessible will override or augment the standard list.
	// Help, title, and description can be overridden.
	NSMutableArray extraAttributes = NSMutableArray.arrayWithCapacity(3);
	extraAttributes.addObject(OS.NSAccessibilityHelpAttribute);
	extraAttributes.addObject(OS.NSAccessibilityDescriptionAttribute);
	extraAttributes.addObject(OS.NSAccessibilityTitleAttribute);

	for (int i = (int)/64/extraAttributes.count() - 1; i >= 0; i--) {
	NSString attribute = new NSString(extraAttributes.objectAtIndex(i).id);
	if (accessible.internal_accessibilityAttributeValue(attribute, ACC.CHILDID_SELF) != null) {
	ourAttributes.addObject(extraAttributes.objectAtIndex(i));
	}
	}
	}

	accessibilityAttributes = ourAttributes;
	accessibilityAttributes.retain();
	}

	return accessibilityAttributes.id;
	}

	int /long/ accessibilityAttributeValue(int /long/ id, int /long/ sel, int /long/ arg0) {
	int /long/ returnValue = 0;
	NSString attributeName = new NSString(arg0);

	if (accessible != null) {
	id returnObject = accessible.internal_accessibilityAttributeValue(attributeName, ACC.CHILDID_SELF);

	if (returnObject != null) returnValue = returnObject.id;
	}

	if (returnValue != 0) return returnValue;

	if (attributeName.isEqualToString (OS.NSAccessibilityRoleAttribute) \|\| attributeName.isEqualToString (OS.NSAccessibilityRoleDescriptionAttribute)) {
	NSString roleText = OS.NSAccessibilitySplitterRole;

	if (attributeName.isEqualToString (OS.NSAccessibilityRoleAttribute)) {
	return roleText.id;
	} else { // NSAccessibilityRoleDescriptionAttribute
	return OS.NSAccessibilityRoleDescription (roleText.id, 0);
	}
	} else if (attributeName.isEqualToString (OS.NSAccessibilityEnabledAttribute)) {
	return NSNumber.numberWithBool(isEnabled()).id;
	} else if (attributeName.isEqualToString (OS.NSAccessibilityOrientationAttribute)) {
	NSString orientation = (style & SWT.VERTICAL) != 0 ? OS.NSAccessibilityVerticalOrientationValue : OS.NSAccessibilityHorizontalOrientationValue;
	return orientation.id;
	} else if (attributeName.isEqualToString (OS.NSAccessibilityValueAttribute)) {
	Point location = getLocation();
	int value = (style & SWT.VERTICAL) != 0 ? location.x : location.y;
	return NSNumber.numberWithInt(value).id;
	} else if (attributeName.isEqualToString (OS.NSAccessibilityMaxValueAttribute)) {
	NSRect parentBounds = view.bounds();
	float /double/ maxValue = (style & SWT.VERTICAL) != 0 ?
	parentBounds.width :
	parentBounds.height;
	return NSNumber.numberWithInt((int)maxValue).id;
	} else if (attributeName.isEqualToString (OS.NSAccessibilityMinValueAttribute)) {
	return NSNumber.numberWithInt(0).id;
	} else if (attributeName.isEqualToString (OS.NSAccessibilityNextContentsAttribute)) {
	Control[] children = parent._getChildren();
	Control nextView = null;
	for (int i = 0; i < children.length; i++) {
	if (children[i] == this) {
	if (i < children.length - 1) {
	nextView = children[i + 1];
	break;
	}
	}
	}

	if (nextView != null)
	return NSArray.arrayWithObject(nextView.view).id;
	else
	return NSArray.array().id;
	} else if (attributeName.isEqualToString (OS.NSAccessibilityPreviousContentsAttribute)) {
	Control[] children = parent._getChildren();
	Control nextView = null;
	for (int i = 0; i < children.length; i++) {
	if (children[i] == this) {
	if (i > 0) {
	nextView = children[i - 1];
	break;
	}
	}
	}

	if (nextView != null)
	return NSArray.arrayWithObject(nextView.view).id;
	else
	return NSArray.array().id;
	}

	return super.accessibilityAttributeValue(id, sel, arg0);
	}

	boolean accessibilityIsIgnored(int /long/ id, int /long/ sel) {
	return false;
	}

	/**
	* 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);
	}

	boolean becomeFirstResponder (int /long/ id, int /long/ sel) {
	boolean result = super.becomeFirstResponder(id, sel);
	NSRect frame = view.frame();
	lastX = (int)frame.x;
	lastY = (int)frame.y;
	return result;
	}

	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 \|= THEME_BACKGROUND;
	NSView widget = (NSView)new SWTView().alloc();
	widget.init ();
	view = widget;
	}

	void drawBackground (int /long/ id, NSGraphicsContext context, NSRect rect) {
	if (id != view.id) return;
	fillBackground (view, context, rect, -1);
	}

	Cursor findCursor () {
	Cursor cursor = super.findCursor ();
	if (cursor == null) {
	int cursorType = (style & SWT.HORIZONTAL) != 0 ? SWT.CURSOR_SIZENS : SWT.CURSOR_SIZEWE;
	cursor = display.getSystemCursor (cursorType);
	}
	return cursor;
	}

	boolean sendKeyEvent(NSEvent nsEvent, int type) {
	super.sendKeyEvent (nsEvent, type);
	if (type == SWT.KeyDown) {
	int keyCode = nsEvent.keyCode();
	switch (keyCode) {
	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 /long/ modifiers = nsEvent.modifierFlags();
	if ((modifiers & OS.NSControlKeyMask) != 0) stepSize = INCREMENT;
	if ((style & SWT.VERTICAL) != 0) {
	if (keyCode == 126 \|\| keyCode == 125) break;
	xChange = keyCode == 123 ? -stepSize : stepSize;
	} else {
	if (keyCode == 123 \|\| keyCode == 124) break;
	yChange = keyCode == 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 true;
	Event event = new Event ();
	event.x = newX;
	event.y = newY;
	event.width = width;
	event.height = height;
	sendEvent (SWT.Selection, event);
	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 false;
	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 true;
	}

	void mouseDown(int /long/ id, int /long/ sel, int /long/ theEvent) {
	//TODO use sendMouseEvent
	super.mouseDown(id, sel, theEvent);
	if (isDisposed()) return;
	NSEvent nsEvent = new NSEvent(theEvent);
	if (nsEvent.clickCount() != 1) return;
	NSPoint location = nsEvent.locationInWindow();
	NSPoint point = view.convertPoint_fromView_(location, null);
	startX = (int)point.x;
	startY = (int)point.y;
	NSRect frame = view.frame();
	Event event = new Event ();
	event.x = (int)frame.x;
	event.y = (int)frame.y;
	event.width = (int)frame.width;
	event.height = (int)frame.height;
	sendEvent (SWT.Selection, event);
	if (isDisposed ()) return;
	if (event.doit) {
	lastX = event.x;
	lastY = event.y;
	dragging = true;
	setLocation(event.x, event.y);
	}
	}

	boolean mouseEvent (int /long/ id, int /long/ sel, int /long/ theEvent, int type) {
	super.mouseEvent (id, sel, theEvent, type);
	return new NSEvent (theEvent).type () != OS.NSLeftMouseDown;
	}

	void mouseDragged(int /long/ id, int /long/ sel, int /long/ theEvent) {
	//TODO use sendMouseEvent
	super.mouseDragged(id, sel, theEvent);
	if (isDisposed()) return;
	if (!dragging) return;
	NSEvent nsEvent = new NSEvent(theEvent);
	NSPoint location = nsEvent.locationInWindow();
	NSPoint point = view.convertPoint_fromView_(location, null);
	NSRect frame = view.frame();
	NSRect parentFrame = parent.topView().frame();
	int newX = lastX, newY = lastY;
	if ((style & SWT.VERTICAL) != 0) {
	newX = Math.min (Math.max (0, (int)(point.x + frame.x - startX)), (int)(parentFrame.width - frame.width));
	} else {
	newY = Math.min (Math.max (0, (int)(point.y + frame.y - startY)), (int)(parentFrame.height - frame.height));
	}
	if (newX == lastX && newY == lastY) return;
	Event event = new Event ();
	event.x = newX;
	event.y = newY;
	event.width = (int)frame.width;
	event.height = (int)frame.height;
	sendEvent (SWT.Selection, event);
	if (isDisposed ()) return;
	if (event.doit) {
	lastX = event.x;
	lastY = event.y;
	setBounds (event.x, event.y, (int)frame.width, (int)frame.height);
	}
	}

	void mouseUp(int /long/ id, int /long/ sel, int /long/ theEvent) {
	//TODO use sendMouseEvent
	super.mouseUp(id, sel, theEvent);
	if (isDisposed()) return;
	if (!dragging) return;
	dragging = false;
	NSRect frame = view.frame();
	Event event = new Event ();
	event.x = lastX;
	event.y = lastY;
	event.width = (int)frame.width;
	event.height = (int)frame.height;
	sendEvent (SWT.Selection, event);
	if (isDisposed ()) return;
	if (event.doit) {
	setBounds (event.x, event.y, (int)frame.width, (int)frame.height);
	}
	}

	void releaseHandle () {
	super.releaseHandle ();
	if (accessibilityAttributes != null) accessibilityAttributes.release();
	accessibilityAttributes = null;
	}

	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);
	}

	void superKeyDown (int /long/ id, int /long/ sel, int /long/ theEvent) {
	}

	void superKeyUp (int /long/ id, int /long/ sel, int /long/ theEvent) {
	}

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

	}