bundles/org.eclipse.swt/Eclipse SWT/carbon/org/eclipse/swt/widgets/ToolBar.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.carbon.CFRange;
 import org.eclipse.swt.internal.carbon.OS;

 import org.eclipse.swt.*;
 import org.eclipse.swt.graphics.*;

 /**
  * Instances of this class support the layout of selectable
  * tool bar items.
  * <p>
  * The item children that may be added to instances of this class
  * must be of type <code>ToolItem</code>.
  * </p><p>
  * Note that although this class is a subclass of <code>Composite</code>,
  * it does not make sense to add <code>Control</code> children to it,
  * or set a layout on it.
  * </p><p>
  * <dl>
  * <dt><b>Styles:</b></dt>
  * <dd>FLAT, WRAP, RIGHT, HORIZONTAL, VERTICAL, SHADOW_OUT</dd>
  * <dt><b>Events:</b></dt>
  * <dd>(none)</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/#toolbar">ToolBar, ToolItem 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 ToolBar extends Composite {
 	int itemCount;
 	ToolItem [] items;


 /**
  * 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#FLAT
  * @see SWT#WRAP
  * @see SWT#RIGHT
  * @see SWT#HORIZONTAL
  * @see SWT#SHADOW_OUT
  * @see SWT#VERTICAL
  * @see Widget#checkSubclass()
  * @see Widget#getStyle()
  */
 public ToolBar (Composite parent, int style) {
 	super (parent, checkStyle (style));

 	/*
 	* Ensure that either of HORIZONTAL or VERTICAL is set.
 	* NOTE: HORIZONTAL and VERTICAL have the same values
 	* as H_SCROLL and V_SCROLL so it is necessary to first
 	* clear these bits to avoid scroll bars and then reset
 	* the bits using the original style supplied by the
 	* programmer.
 	*/
 	if ((style & SWT.VERTICAL) != 0) {
 		this.style |= SWT.VERTICAL;
 	} else {
 		this.style |= SWT.HORIZONTAL;
 	}
 }

 static int checkStyle (int style) {
 	/*
 	* Even though it is legal to create this widget
 	* with scroll bars, they serve no useful purpose
 	* because they do not automatically scroll the
 	* widget's client area.  The fix is to clear
 	* the SWT style.
 	*/
 	return style & ~(SWT.H_SCROLL | SWT.V_SCROLL);
 }

 protected void checkSubclass () {
 	if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS);
 }

 public Point computeSize (int wHint, int hHint, boolean changed) {
 	checkWidget();
 	int width = wHint, height = hHint;
 	if (wHint == SWT.DEFAULT) width = 0x7FFFFFFF;
 	if (hHint == SWT.DEFAULT) height = 0x7FFFFFFF;
 	int [] result = layout (width, height, false);
 	Point extent = new Point (result [1], result [2]);
 	if (wHint != SWT.DEFAULT) extent.x = wHint;
 	if (hHint != SWT.DEFAULT) extent.y = hHint;
 	return extent;
 }

 void createHandle () {
 	state |= GRAB | THEME_BACKGROUND;
 	super.createHandle (parent.handle);
 	OS.HIObjectSetAccessibilityIgnored (handle, false);
 }

 void createItem (ToolItem item, int index) {
 	if (!(0 <= index && index <= itemCount)) error (SWT.ERROR_INVALID_RANGE);
 	if (itemCount == items.length) {
 		ToolItem [] newItems = new ToolItem [itemCount + 4];
 		System.arraycopy (items, 0, newItems, 0, items.length);
 		items = newItems;
 	}
 	item.createWidget ();
 	System.arraycopy (items, index, items, index + 1, itemCount++ - index);
 	items [index] = item;
 	relayout ();
 }

 void createWidget () {
 	super.createWidget ();
 	items = new ToolItem [4];
 	itemCount = 0;
 }

 int defaultThemeFont () {
 	if (display.smallFonts) return OS.kThemeToolbarFont;
 	return OS.kThemeSystemFont;
 }

 void destroyItem (ToolItem item) {
 	int index = 0;
 	while (index < itemCount) {
 		if (items [index] == item) break;
 		index++;
 	}
 	if (index == itemCount) return;
 	System.arraycopy (items, index + 1, items, index, --itemCount - index);
 	items [itemCount] = null;
 	relayout ();
 }

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

 void enableWidget (boolean enabled) {
 	/* Do nothing - A tool bar does not disable items when it is disabled */
 }

 /**
  * Returns the item at the given, zero-relative index in the
  * receiver. Throws an exception if the index is out of range.
  *
  * @param index the index of the item to return
  * @return the item at the given index
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</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>
  */
 public ToolItem getItem (int index) {
 	checkWidget();
 	if (0 <= index && index < itemCount) return items [index];
 	error (SWT.ERROR_INVALID_RANGE);
 	return null;
 }

 /**
  * Returns the item at the given point in the receiver
  * or null if no such item exists. The point is in the
  * coordinate system of the receiver.
  *
  * @param point the point used to locate the item
  * @return the item at the given point
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if the point 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>
  */
 public ToolItem getItem (Point pt) {
 	checkWidget();
 	if (pt == null) error (SWT.ERROR_NULL_ARGUMENT);
 	for (int i=0; i<itemCount; i++) {
 		Rectangle rect = items [i].getBounds ();
 		if (rect.contains (pt)) return items [i];
 	}
 	return null;
 }

 /**
  * Returns the number of items contained in the receiver.
  *
  * @return the number of items
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public int getItemCount () {
 	checkWidget();
 	return itemCount;
 }

 /**
  * Returns an array of <code>ToolItem</code>s which are the items
  * in the receiver.
  * <p>
  * Note: This is not the actual structure used by the receiver
  * to maintain its list of items, so modifying the array will
  * not affect the receiver.
  * </p>
  *
  * @return the items in the receiver
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public ToolItem [] getItems () {
 	checkWidget();
 	ToolItem [] result = new ToolItem [itemCount];
 	System.arraycopy (items, 0, result, 0, itemCount);
 	return result;
 }

 /**
  * Returns the number of rows in the receiver. When
  * the receiver has the <code>WRAP</code> style, the
  * number of rows can be greater than one.  Otherwise,
  * the number of rows is always one.
  *
  * @return the number of items
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public int getRowCount () {
 	checkWidget();
 	Rectangle rect = getClientArea ();
 	return layout (rect.width, rect.height, false) [0];
 }

 /**
  * Searches the receiver's list starting at the first item
  * (index 0) until an item is found that is equal to the
  * argument, and returns the index of that item. If no item
  * is found, returns -1.
  *
  * @param item the search item
  * @return the index of the item
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if the tool item is null</li>
  *    <li>ERROR_INVALID_ARGUMENT - if the tool item has been disposed</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>
  */
 public int indexOf (ToolItem item) {
 	checkWidget();
 	if (item == null) error (SWT.ERROR_NULL_ARGUMENT);
 	if (item.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT);
 	for (int i=0; i<itemCount; i++) {
 		if (items [i] == item) return i;
 	}
 	return -1;
 }

 void invalidateChildrenVisibleRegion (int control) {
 	super.invalidateChildrenVisibleRegion (control);
 	for (int i=0; i<itemCount; i++) {
 		ToolItem item = items [i];
 		item.resetVisibleRegion (control);
 	}
 }

 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.kAXToolbarRole;
 		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;
 		}
 	}
 	if (accessible != null) {
 		code = accessible.internal_kEventAccessibleGetNamedAttribute (nextHandler, theEvent, code);
 	}
 	return code;
 }

 int [] layoutHorizontal (int width, int height, boolean resize) {
 	int xSpacing = 0, ySpacing = 2;
 	int marginWidth = 0, marginHeight = 0;
 	int x = marginWidth, y = marginHeight;
 	int maxX = 0, rows = 1;
 	boolean wrap = (style & SWT.WRAP) != 0;
 	int itemHeight = 0;
 	Point [] sizes = new Point [itemCount];
 	for (int i=0; i<itemCount; i++) {
 		Point size = sizes [i] = items [i].computeSize ();
 		itemHeight = Math.max (itemHeight, size.y);
 	}
 	for (int i=0; i<itemCount; i++) {
 		ToolItem item = items [i];
 		Point size = sizes [i];
 		if (wrap && i != 0 && x + size.x > width) {
 			rows++;
 			x = marginWidth;
 			y += ySpacing + itemHeight;
 		}
 		if (resize) {
 			item.setBounds (x, y, size.x, itemHeight);
 			boolean visible = x + size.x <= width && y + itemHeight <= height;
 			item.setVisible (visible);
 			Control control = item.control;
 			if (control != null) {
 				int controlY = y + (itemHeight - size.y) / 2;
 				control.setBounds (x, controlY, size.x, itemHeight - (controlY - y));
 			}
 		}
 		x += xSpacing + size.x;
 		maxX = Math.max (maxX, x);
 	}

 	//TODO - tempporary code
 	if (resize) invalidateVisibleRegion (handle);

 	return new int [] {rows, maxX, y + itemHeight};
 }

 int [] layoutVertical (int width, int height, boolean resize) {
 	int xSpacing = 2, ySpacing = 0;
 	int marginWidth = 0, marginHeight = 0;
 	int x = marginWidth, y = marginHeight;
 	int maxY = 0, cols = 1;
 	boolean wrap = (style & SWT.WRAP) != 0;
 	int itemWidth = 0;
 	Point [] sizes = new Point [itemCount];
 	for (int i=0; i<itemCount; i++) {
 		Point size = sizes [i] = items [i].computeSize ();
 		itemWidth = Math.max (itemWidth, size.x);
 	}
 	for (int i=0; i<itemCount; i++) {
 		ToolItem item = items [i];
 		Point size = sizes [i];
 		if (wrap && i != 0 && y + size.y > height) {
 			cols++;
 			x += xSpacing + itemWidth;
 			y = marginHeight;
 		}
 		if (resize) {
 			item.setBounds (x, y, itemWidth, size.y);
 			boolean visible = x + itemWidth <= width && y + size.y <= height;
 			item.setVisible (visible);
 			Control control = item.control;
 			if (control != null) {
 				int controlX = x + (itemWidth - size.x) / 2;
 				control.setBounds (controlX, y, itemWidth - (controlX - x), size.y);
 			}
 		}
 		y += ySpacing + size.y;
 		maxY = Math.max (maxY, y);
 	}

 	//TODO - tempporary code
 	if (resize) invalidateVisibleRegion (handle);

 	return new int [] {cols, x + itemWidth, maxY};
 }

 int [] layout (int nWidth, int nHeight, boolean resize) {
 	if ((style & SWT.VERTICAL) != 0) {
 		return layoutVertical (nWidth, nHeight, resize);
 	} else {
 		return layoutHorizontal (nWidth, nHeight, resize);
 	}
 }

 void relayout () {
 	if (!getDrawing ()) return;
 	Rectangle rect = getClientArea ();
 	layout (rect.width, rect.height, true);
 }

 void releaseChildren (boolean destroy) {
 	if (items != null) {
 		for (int i=0; i<itemCount; i++) {
 			ToolItem item = items [i];
 			if (item != null && !item.isDisposed ()) {
 				item.release (false);
 			}
 		}
 		itemCount = 0;
 		items = null;
 	}
 	super.releaseChildren (destroy);
 }

 void removeControl (Control control) {
 	super.removeControl (control);
 	for (int i=0; i<itemCount; i++) {
 		ToolItem item = items [i];
 		if (item.control == control) item.setControl (null);
 	}
 }

 void setBackground (float [] color) {
 	super.setBackground (color);
 	if (items == null) return;
 	for (int i=0; i<itemCount; i++) {
 		ToolItem item = items [i];
 		item.setBackground (color);
 	}
 	redrawWidget (handle, true);
 }

 int setBounds (int x, int y, int width, int height, boolean move, boolean resize, boolean events) {
 	int result = super.setBounds (x, y, width, height, move, resize, events);
 	if ((result & RESIZED) != 0) 	relayout ();
 	return result;
 }

 void setFontStyle (Font font) {
 	super.setFontStyle (font);
 	if (items == null) return;
 	for (int i=0; i<itemCount; i++) {
 		ToolItem item = items [i];
 		item.setFontStyle (font);
 	}
 	redrawWidget (handle, true);
 	relayout ();
 }

 void setForeground (float [] color) {
 	super.setForeground (color);
 	if (items == null) return;
 	for (int i=0; i<itemCount; i++) {
 		ToolItem item = items [i];
 		item.setForeground (color);
 	}
 	redrawWidget (handle, true);
 }

 public void setRedraw (boolean redraw) {
 	checkWidget();
 	super.setRedraw (redraw);
 	if (redraw && drawCount == 0) relayout();
 }

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

	import org.eclipse.swt.*;
	import org.eclipse.swt.graphics.*;

	/**
	* Instances of this class support the layout of selectable
	* tool bar items.
	* <p>
	* The item children that may be added to instances of this class
	* must be of type <code>ToolItem</code>.
	* </p><p>
	* Note that although this class is a subclass of <code>Composite</code>,
	* it does not make sense to add <code>Control</code> children to it,
	* or set a layout on it.
	* </p><p>
	* <dl>
	* <dt><b>Styles:</b></dt>
	* <dd>FLAT, WRAP, RIGHT, HORIZONTAL, VERTICAL, SHADOW_OUT</dd>
	* <dt><b>Events:</b></dt>
	* <dd>(none)</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/#toolbar">ToolBar, ToolItem 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 ToolBar extends Composite {
	int itemCount;
	ToolItem [] items;


	/**
	* 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#FLAT
	* @see SWT#WRAP
	* @see SWT#RIGHT
	* @see SWT#HORIZONTAL
	* @see SWT#SHADOW_OUT
	* @see SWT#VERTICAL
	* @see Widget#checkSubclass()
	* @see Widget#getStyle()
	*/
	public ToolBar (Composite parent, int style) {
	super (parent, checkStyle (style));

	/*
	* Ensure that either of HORIZONTAL or VERTICAL is set.
	* NOTE: HORIZONTAL and VERTICAL have the same values
	* as H_SCROLL and V_SCROLL so it is necessary to first
	* clear these bits to avoid scroll bars and then reset
	* the bits using the original style supplied by the
	* programmer.
	*/
	if ((style & SWT.VERTICAL) != 0) {
	this.style \|= SWT.VERTICAL;
	} else {
	this.style \|= SWT.HORIZONTAL;
	}
	}

	static int checkStyle (int style) {
	/*
	* Even though it is legal to create this widget
	* with scroll bars, they serve no useful purpose
	* because they do not automatically scroll the
	* widget's client area. The fix is to clear
	* the SWT style.
	*/
	return style & ~(SWT.H_SCROLL \| SWT.V_SCROLL);
	}

	protected void checkSubclass () {
	if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS);
	}

	public Point computeSize (int wHint, int hHint, boolean changed) {
	checkWidget();
	int width = wHint, height = hHint;
	if (wHint == SWT.DEFAULT) width = 0x7FFFFFFF;
	if (hHint == SWT.DEFAULT) height = 0x7FFFFFFF;
	int [] result = layout (width, height, false);
	Point extent = new Point (result [1], result [2]);
	if (wHint != SWT.DEFAULT) extent.x = wHint;
	if (hHint != SWT.DEFAULT) extent.y = hHint;
	return extent;
	}

	void createHandle () {
	state \|= GRAB \| THEME_BACKGROUND;
	super.createHandle (parent.handle);
	OS.HIObjectSetAccessibilityIgnored (handle, false);
	}

	void createItem (ToolItem item, int index) {
	if (!(0 <= index && index <= itemCount)) error (SWT.ERROR_INVALID_RANGE);
	if (itemCount == items.length) {
	ToolItem [] newItems = new ToolItem [itemCount + 4];
	System.arraycopy (items, 0, newItems, 0, items.length);
	items = newItems;
	}
	item.createWidget ();
	System.arraycopy (items, index, items, index + 1, itemCount++ - index);
	items [index] = item;
	relayout ();
	}

	void createWidget () {
	super.createWidget ();
	items = new ToolItem [4];
	itemCount = 0;
	}

	int defaultThemeFont () {
	if (display.smallFonts) return OS.kThemeToolbarFont;
	return OS.kThemeSystemFont;
	}

	void destroyItem (ToolItem item) {
	int index = 0;
	while (index < itemCount) {
	if (items [index] == item) break;
	index++;
	}
	if (index == itemCount) return;
	System.arraycopy (items, index + 1, items, index, --itemCount - index);
	items [itemCount] = null;
	relayout ();
	}

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

	void enableWidget (boolean enabled) {
	/* Do nothing - A tool bar does not disable items when it is disabled */
	}

	/**
	* Returns the item at the given, zero-relative index in the
	* receiver. Throws an exception if the index is out of range.
	*
	* @param index the index of the item to return
	* @return the item at the given index
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</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>
	*/
	public ToolItem getItem (int index) {
	checkWidget();
	if (0 <= index && index < itemCount) return items [index];
	error (SWT.ERROR_INVALID_RANGE);
	return null;
	}

	/**
	* Returns the item at the given point in the receiver
	* or null if no such item exists. The point is in the
	* coordinate system of the receiver.
	*
	* @param point the point used to locate the item
	* @return the item at the given point
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if the point 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>
	*/
	public ToolItem getItem (Point pt) {
	checkWidget();
	if (pt == null) error (SWT.ERROR_NULL_ARGUMENT);
	for (int i=0; i<itemCount; i++) {
	Rectangle rect = items [i].getBounds ();
	if (rect.contains (pt)) return items [i];
	}
	return null;
	}

	/**
	* Returns the number of items contained in the receiver.
	*
	* @return the number of items
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public int getItemCount () {
	checkWidget();
	return itemCount;
	}

	/**
	* Returns an array of <code>ToolItem</code>s which are the items
	* in the receiver.
	* <p>
	* Note: This is not the actual structure used by the receiver
	* to maintain its list of items, so modifying the array will
	* not affect the receiver.
	* </p>
	*
	* @return the items in the receiver
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public ToolItem [] getItems () {
	checkWidget();
	ToolItem [] result = new ToolItem [itemCount];
	System.arraycopy (items, 0, result, 0, itemCount);
	return result;
	}

	/**
	* Returns the number of rows in the receiver. When
	* the receiver has the <code>WRAP</code> style, the
	* number of rows can be greater than one. Otherwise,
	* the number of rows is always one.
	*
	* @return the number of items
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public int getRowCount () {
	checkWidget();
	Rectangle rect = getClientArea ();
	return layout (rect.width, rect.height, false) [0];
	}

	/**
	* Searches the receiver's list starting at the first item
	* (index 0) until an item is found that is equal to the
	* argument, and returns the index of that item. If no item
	* is found, returns -1.
	*
	* @param item the search item
	* @return the index of the item
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if the tool item is null</li>
	* <li>ERROR_INVALID_ARGUMENT - if the tool item has been disposed</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>
	*/
	public int indexOf (ToolItem item) {
	checkWidget();
	if (item == null) error (SWT.ERROR_NULL_ARGUMENT);
	if (item.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT);
	for (int i=0; i<itemCount; i++) {
	if (items [i] == item) return i;
	}
	return -1;
	}

	void invalidateChildrenVisibleRegion (int control) {
	super.invalidateChildrenVisibleRegion (control);
	for (int i=0; i<itemCount; i++) {
	ToolItem item = items [i];
	item.resetVisibleRegion (control);
	}
	}

	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.kAXToolbarRole;
	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;
	}
	}
	if (accessible != null) {
	code = accessible.internal_kEventAccessibleGetNamedAttribute (nextHandler, theEvent, code);
	}
	return code;
	}

	int [] layoutHorizontal (int width, int height, boolean resize) {
	int xSpacing = 0, ySpacing = 2;
	int marginWidth = 0, marginHeight = 0;
	int x = marginWidth, y = marginHeight;
	int maxX = 0, rows = 1;
	boolean wrap = (style & SWT.WRAP) != 0;
	int itemHeight = 0;
	Point [] sizes = new Point [itemCount];
	for (int i=0; i<itemCount; i++) {
	Point size = sizes [i] = items [i].computeSize ();
	itemHeight = Math.max (itemHeight, size.y);
	}
	for (int i=0; i<itemCount; i++) {
	ToolItem item = items [i];
	Point size = sizes [i];
	if (wrap && i != 0 && x + size.x > width) {
	rows++;
	x = marginWidth;
	y += ySpacing + itemHeight;
	}
	if (resize) {
	item.setBounds (x, y, size.x, itemHeight);
	boolean visible = x + size.x <= width && y + itemHeight <= height;
	item.setVisible (visible);
	Control control = item.control;
	if (control != null) {
	int controlY = y + (itemHeight - size.y) / 2;
	control.setBounds (x, controlY, size.x, itemHeight - (controlY - y));
	}
	}
	x += xSpacing + size.x;
	maxX = Math.max (maxX, x);
	}

	//TODO - tempporary code
	if (resize) invalidateVisibleRegion (handle);

	return new int [] {rows, maxX, y + itemHeight};
	}

	int [] layoutVertical (int width, int height, boolean resize) {
	int xSpacing = 2, ySpacing = 0;
	int marginWidth = 0, marginHeight = 0;
	int x = marginWidth, y = marginHeight;
	int maxY = 0, cols = 1;
	boolean wrap = (style & SWT.WRAP) != 0;
	int itemWidth = 0;
	Point [] sizes = new Point [itemCount];
	for (int i=0; i<itemCount; i++) {
	Point size = sizes [i] = items [i].computeSize ();
	itemWidth = Math.max (itemWidth, size.x);
	}
	for (int i=0; i<itemCount; i++) {
	ToolItem item = items [i];
	Point size = sizes [i];
	if (wrap && i != 0 && y + size.y > height) {
	cols++;
	x += xSpacing + itemWidth;
	y = marginHeight;
	}
	if (resize) {
	item.setBounds (x, y, itemWidth, size.y);
	boolean visible = x + itemWidth <= width && y + size.y <= height;
	item.setVisible (visible);
	Control control = item.control;
	if (control != null) {
	int controlX = x + (itemWidth - size.x) / 2;
	control.setBounds (controlX, y, itemWidth - (controlX - x), size.y);
	}
	}
	y += ySpacing + size.y;
	maxY = Math.max (maxY, y);
	}

	//TODO - tempporary code
	if (resize) invalidateVisibleRegion (handle);

	return new int [] {cols, x + itemWidth, maxY};
	}

	int [] layout (int nWidth, int nHeight, boolean resize) {
	if ((style & SWT.VERTICAL) != 0) {
	return layoutVertical (nWidth, nHeight, resize);
	} else {
	return layoutHorizontal (nWidth, nHeight, resize);
	}
	}

	void relayout () {
	if (!getDrawing ()) return;
	Rectangle rect = getClientArea ();
	layout (rect.width, rect.height, true);
	}

	void releaseChildren (boolean destroy) {
	if (items != null) {
	for (int i=0; i<itemCount; i++) {
	ToolItem item = items [i];
	if (item != null && !item.isDisposed ()) {
	item.release (false);
	}
	}
	itemCount = 0;
	items = null;
	}
	super.releaseChildren (destroy);
	}

	void removeControl (Control control) {
	super.removeControl (control);
	for (int i=0; i<itemCount; i++) {
	ToolItem item = items [i];
	if (item.control == control) item.setControl (null);
	}
	}

	void setBackground (float [] color) {
	super.setBackground (color);
	if (items == null) return;
	for (int i=0; i<itemCount; i++) {
	ToolItem item = items [i];
	item.setBackground (color);
	}
	redrawWidget (handle, true);
	}

	int setBounds (int x, int y, int width, int height, boolean move, boolean resize, boolean events) {
	int result = super.setBounds (x, y, width, height, move, resize, events);
	if ((result & RESIZED) != 0) relayout ();
	return result;
	}

	void setFontStyle (Font font) {
	super.setFontStyle (font);
	if (items == null) return;
	for (int i=0; i<itemCount; i++) {
	ToolItem item = items [i];
	item.setFontStyle (font);
	}
	redrawWidget (handle, true);
	relayout ();
	}

	void setForeground (float [] color) {
	super.setForeground (color);
	if (items == null) return;
	for (int i=0; i<itemCount; i++) {
	ToolItem item = items [i];
	item.setForeground (color);
	}
	redrawWidget (handle, true);
	}

	public void setRedraw (boolean redraw) {
	checkWidget();
	super.setRedraw (redraw);
	if (redraw && drawCount == 0) relayout();
	}

	}