Package org.eclipse.swt.widgets

Source Code of org.eclipse.swt.widgets.Widget

/*******************************************************************************
* Copyright (c) 2000, 2006 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
*******************************************************************************/
// Modified by Google
package org.eclipse.swt.widgets;


import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.carbon.CGRect;
import org.eclipse.swt.internal.carbon.OS;
import org.eclipse.swt.internal.carbon.RGBColor;
import org.eclipse.swt.internal.carbon.Rect;
import org.eclipse.swt.internal.carbon.PixMap;
import org.eclipse.swt.internal.carbon.BitMap;

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

/**
* This class is the abstract superclass of all user interface objects. 
* Widgets are created, disposed and issue notification to listeners
* when events occur which affect them.
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>(none)</dd>
* <dt><b>Events:</b></dt>
* <dd>Dispose</dd>
* </dl>
* <p>
* IMPORTANT: This class is intended to be subclassed <em>only</em>
* within the SWT implementation. However, it has not been marked
* final to allow those outside of the SWT development team to implement
* patched versions of the class in order to get around specific
* limitations in advance of when those limitations can be addressed
* by the team.  Any class built using subclassing to access the internals
* of this class will likely fail to compile or run between releases and
* may be strongly platform specific. Subclassing should not be attempted
* without an intimate and detailed understanding of the workings of the
* hierarchy. No support is provided for user-written classes which are
* implemented as subclasses of this class.
* </p>
*
* @see #checkSubclass
*/
public abstract class Widget {
  int style, state;
  Display display;
  EventTable eventTable;
  Object data;

  /* Global state flags */
  static final int DISPOSED         = 1 << 0;
  static final int CANVAS           = 1 << 1;
  static final int KEYED_DATA       = 1 << 2;
  static final int DISABLED         = 1 << 3;
  static final int HIDDEN           = 1 << 4;
  static final int GRAB               = 1 << 5;
  static final int MOVED            = 1 << 6;
  static final int RESIZED          = 1 << 7;
  static final int EXPANDING        = 1 << 8;
  static final int IGNORE_WHEEL     = 1 << 9;
  static final int PARENT_BACKGROUND = 1 << 10;
  static final int THEME_BACKGROUND = 1 << 11;
 
  /* A layout was requested on this widget */
  static final int LAYOUT_NEEDED  = 1<<12;
 
  /* The preferred size of a child has changed */
  static final int LAYOUT_CHANGED = 1<<13;
 
  /* A layout was requested in this widget hierachy */
  static final int LAYOUT_CHILD = 1<<14;

  /* More global state flags */
  static final int RELEASED = 1<<15;
  static final int DISPOSE_SENT = 1<<16;
 
  /* Default size for widgets */
  static final int DEFAULT_WIDTH  = 64;
  static final int DEFAULT_HEIGHT  = 64;
 
  static final Rect EMPTY_RECT = new Rect ();

  // GOOGLE: patched in from https://bugs.eclipse.org/bugs/show_bug.cgi?id=161259
  static final String CLEAR_GRAB_BIT = "org.eclipse.swt.internal.carbon.clearGrabBit";
 
Widget () {
  /* Do nothing */
}

/**
* 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 widget which will be the parent of the new instance (cannot be null)
* @param style the style of widget to construct
*
* @exception IllegalArgumentException <ul>
*    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
*    <li>ERROR_INVALID_ARGUMENT - if the parent is disposed</li>
* </ul>
* @exception SWTException <ul>
*    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
*    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
* </ul>
*
* @see SWT
* @see #checkSubclass
* @see #getStyle
*/
public Widget (Widget parent, int style) {
  checkSubclass ();
  checkParent (parent);
  this.style = style;
  display = parent.display;
}

int actionProc (int theControl, int partCode) {
  return OS.noErr;
}

/**
* Adds the listener to the collection of listeners who will
* be notified when an event of the given type occurs. When the
* event does occur in the widget, the listener is notified by
* sending it the <code>handleEvent()</code> message. The event
* type is one of the event constants defined in class <code>SWT</code>.
*
* @param eventType the type of event to listen for
* @param listener the listener which should be notified when the event occurs
*
* @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 Listener
* @see SWT
* @see #removeListener
* @see #notifyListeners
*/
public void addListener (int eventType, Listener listener) {
  checkWidget();
  if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
  _addListener (eventType, listener);
}

void _addListener (int eventType, Listener listener) {
  if (eventTable == null) eventTable = new EventTable ();
  eventTable.hook (eventType, listener);
}

int callPaintEventHandler (int control, int damageRgn, int visibleRgn, int theEvent, int nextHandler) {
  return OS.CallNextEventHandler (nextHandler, theEvent);
}

/**
* Adds the listener to the collection of listeners who will
* be notified when the widget is disposed. When the widget is
* disposed, the listener is notified by sending it the
* <code>widgetDisposed()</code> message.
*
* @param listener the listener which should be notified when the receiver is disposed
*
* @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 DisposeListener
* @see #removeDisposeListener
*/
public void addDisposeListener (DisposeListener listener) {
  checkWidget();
  if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
  TypedListener typedListener = new TypedListener (listener);
  addListener (SWT.Dispose, typedListener);
}

static int checkBits (int style, int int0, int int1, int int2, int int3, int int4, int int5) {
  int mask = int0 | int1 | int2 | int3 | int4 | int5;
  if ((style & mask) == 0) style |= int0;
  if ((style & int0) != 0) style = (style & ~mask) | int0;
  if ((style & int1) != 0) style = (style & ~mask) | int1;
  if ((style & int2) != 0) style = (style & ~mask) | int2;
  if ((style & int3) != 0) style = (style & ~mask) | int3;
  if ((style & int4) != 0) style = (style & ~mask) | int4;
  if ((style & int5) != 0) style = (style & ~mask) | int5;
  return style;
}

void calculateVisibleRegion (int control, int visibleRgn, boolean clipChildren) {
  int tempRgn = OS.NewRgn ();
  if (OS.IsControlVisible (control)) {
    int childRgn = OS.NewRgn ();
    int window = OS.GetControlOwner (control);
    short [] count = new short [1];
    int [] outControl = new int [1];
    OS.GetRootControl (window, outControl);
    int root = outControl [0];
    OS.GetControlRegion (root, (short) OS.kControlStructureMetaPart, visibleRgn);
    int tempControl = control, lastControl = 0;
    while (tempControl != root) {
      OS.GetControlRegion (tempControl, (short) OS.kControlStructureMetaPart, tempRgn);
      if (OS.HIVIEW) OS.HIViewConvertRegion (tempRgn, tempControl, root);
      OS.SectRgn (tempRgn, visibleRgn, visibleRgn);
      if (OS.EmptyRgn (visibleRgn)) break;
      if (clipChildren || tempControl != control) {
        OS.CountSubControls (tempControl, count);
        for (int i = 0; i < count [0]; i++) {
          OS.GetIndexedSubControl (tempControl, (short)(OS.HIVIEW ? count [0] - i : i + 1), outControl);
          int child = outControl [0];
          if (child == lastControl) break;
          if (!OS.IsControlVisible (child)) continue;
          OS.GetControlRegion (child, (short) OS.kControlStructureMetaPart, tempRgn);
          if (OS.HIVIEW) OS.HIViewConvertRegion (tempRgn, child, root);
          OS.UnionRgn (tempRgn, childRgn, childRgn);
        }
      }
      lastControl = tempControl;
      OS.GetSuperControl (tempControl, outControl);
      tempControl = outControl [0];
    }
    OS.DiffRgn (visibleRgn, childRgn, visibleRgn);
    OS.DisposeRgn (childRgn);
  } else {
    OS.CopyRgn (tempRgn, visibleRgn);
  }
  OS.DisposeRgn (tempRgn);
}

void checkOpen () {
  /* Do nothing */
}

void checkOrientation (Widget parent) {
  style &= ~SWT.MIRRORED;
  if ((style & (SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT)) == 0) {
    if (parent != null) {
      if ((parent.style & SWT.LEFT_TO_RIGHT) != 0) style |= SWT.LEFT_TO_RIGHT;
      if ((parent.style & SWT.RIGHT_TO_LEFT) != 0) style |= SWT.RIGHT_TO_LEFT;
    }
  }
  style = checkBits (style, SWT.LEFT_TO_RIGHT, SWT.RIGHT_TO_LEFT, 0, 0, 0, 0);
}

void checkParent (Widget parent) {
  if (parent == null) error (SWT.ERROR_NULL_ARGUMENT);
  if (parent.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
  parent.checkWidget ();
  parent.checkOpen ();
}

/**
* Checks that this class can be subclassed.
* <p>
* The SWT class library is intended to be subclassed
* only at specific, controlled points (most notably,
* <code>Composite</code> and <code>Canvas</code> when
* implementing new widgets). This method enforces this
* rule unless it is overridden.
* </p><p>
* <em>IMPORTANT:</em> By providing an implementation of this
* method that allows a subclass of a class which does not
* normally allow subclassing to be created, the implementer
* agrees to be fully responsible for the fact that any such
* subclass will likely fail between SWT releases and will be
* strongly platform specific. No support is provided for
* user-written classes which are implemented in this fashion.
* </p><p>
* The ability to subclass outside of the allowed SWT classes
* is intended purely to enable those not on the SWT development
* team to implement patches in order to get around specific
* limitations in advance of when those limitations can be
* addressed by the team. Subclassing should not be attempted
* without an intimate and detailed understanding of the hierarchy.
* </p>
*
* @exception SWTException <ul>
*    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
* </ul>
*/
protected void checkSubclass () {
  if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS);
}

/**
* Throws an <code>SWTException</code> if the receiver can not
* be accessed by the caller. This may include both checks on
* the state of the receiver and more generally on the entire
* execution context. This method <em>should</em> be called by
* widget implementors to enforce the standard SWT invariants.
* <p>
* Currently, it is an error to invoke any method (other than
* <code>isDisposed()</code>) on a widget that has had its
* <code>dispose()</code> method called. It is also an error
* to call widget methods from any thread that is different
* from the thread that created the widget.
* </p><p>
* In future releases of SWT, there may be more or fewer error
* checks and exceptions may be thrown for different reasons.
* </p>
*
* @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>
*/
protected void checkWidget () {
  Display display = this.display;
  if (display == null) error (SWT.ERROR_WIDGET_DISPOSED);
  if (display.thread != Thread.currentThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
  if ((state & DISPOSED) != 0) error (SWT.ERROR_WIDGET_DISPOSED);
}

int colorProc (int inControl, int inMessage, int inDrawDepth, int inDrawInColor) {
  return OS.eventNotHandledErr;
}

boolean contains (int shellX, int shellY) {
  return true;
}

int controlProc (int nextHandler, int theEvent, int userData) {
  int eventKind = OS.GetEventKind (theEvent);
  switch (eventKind) {
    case OS.kEventControlActivate:        return kEventControlActivate (nextHandler, theEvent, userData);
    case OS.kEventControlApplyBackground:    return kEventControlApplyBackground (nextHandler, theEvent, userData);
    case OS.kEventControlBoundsChanged:      return kEventControlBoundsChanged (nextHandler, theEvent, userData);
    case OS.kEventControlClick:          return kEventControlClick (nextHandler, theEvent, userData);
    case OS.kEventControlContextualMenuClick:  return kEventControlContextualMenuClick (nextHandler, theEvent, userData);
    case OS.kEventControlDeactivate:      return kEventControlDeactivate (nextHandler, theEvent, userData);
    case OS.kEventControlDraw:          return kEventControlDraw (nextHandler, theEvent, userData);
    case OS.kEventControlHit:          return kEventControlHit (nextHandler, theEvent, userData);
    case OS.kEventControlSetCursor:        return kEventControlSetCursor (nextHandler, theEvent, userData);
    case OS.kEventControlSetFocusPart:      return kEventControlSetFocusPart (nextHandler, theEvent, userData);
    case OS.kEventControlTrack:          return kEventControlTrack (nextHandler, theEvent, userData);
    case OS.kEventControlGetFocusPart:      return kEventControlGetFocusPart (nextHandler, theEvent, userData);
    case OS.kEventControlHitTest:        return kEventControlHitTest (nextHandler, theEvent, userData);
    case OS.kEventControlGetClickActivation:  return kEventControlGetClickActivation (nextHandler, theEvent, userData);
  }
  return OS.eventNotHandledErr;
}

int accessibilityProc (int nextHandler, int theEvent, int userData) {
  int eventKind = OS.GetEventKind (theEvent);
  switch (eventKind) {
    case OS.kEventAccessibleGetChildAtPoint:  return kEventAccessibleGetChildAtPoint (nextHandler, theEvent, userData);
    case OS.kEventAccessibleGetAllAttributeNames:  return kEventAccessibleGetAllAttributeNames (nextHandler, theEvent, userData);
    case OS.kEventAccessibleGetNamedAttribute:  return kEventAccessibleGetNamedAttribute (nextHandler, theEvent, userData);
  }
  return OS.eventNotHandledErr;
}

int createCIcon (Image image) {
  int imageHandle = image.handle;
  int width = OS.CGImageGetWidth(imageHandle);
  int height = OS.CGImageGetHeight(imageHandle);
  int bpr = OS.CGImageGetBytesPerRow(imageHandle);
  int bpp = OS.CGImageGetBitsPerPixel(imageHandle);
  int bpc = OS.CGImageGetBitsPerComponent(imageHandle);
  int alphaInfo = OS.CGImageGetAlphaInfo(imageHandle);
 
  int maskBpl = (((width + 7) / 8) + 3) / 4 * 4;
  int maskSize = height * maskBpl;
  int pixmapSize = height * bpr;
 
  /* Create the icon */
  int iconSize = PixMap.sizeof + BitMap.sizeof * 2 + 4 + maskSize;
  int iconHandle = OS.NewHandle(iconSize);
  if (iconHandle == 0) SWT.error(SWT.ERROR_NO_HANDLES);
  OS.HLock(iconHandle);
  int[] iconPtr = new int[1];
  OS.memcpy(iconPtr, iconHandle, 4);

  /* Initialize the pixmap */
  PixMap iconPMap = new PixMap();
  iconPMap.rowBytes = (short)(bpr | 0x8000);
  iconPMap.right = (short)width;
  iconPMap.bottom = (short)height;
  iconPMap.cmpCount = 3;
  iconPMap.cmpSize = (short)bpc;
  iconPMap.pmTable = OS.NewHandle(0);
  iconPMap.hRes = 72 << 16;
  iconPMap.vRes = 72 << 16;
  iconPMap.pixelType = (short)OS.RGBDirect;
  iconPMap.pixelSize = (short)bpp;
  iconPMap.pixelFormat = (short)bpp;
  OS.memcpy(iconPtr[0], iconPMap, PixMap.sizeof);

  /* Initialize the mask */
  BitMap iconMask = new BitMap();
  iconMask.rowBytes = (short)maskBpl;
  iconMask.right = (short)width;
  iconMask.bottom = (short)height;
  OS.memcpy(iconPtr[0] + PixMap.sizeof, iconMask, BitMap.sizeof);

  /* Initialize the icon data */
  int iconData = OS.NewHandle(pixmapSize);
  OS.HLock(iconData);
  int[] iconDataPtr = new int[1];
  OS.memcpy(iconDataPtr, iconData, 4);
  OS.memcpy(iconDataPtr[0], image.data, pixmapSize);
  OS.HUnlock(iconData);
  OS.memcpy(iconPtr[0] + PixMap.sizeof + 2 * BitMap.sizeof, new int[]{iconData}, 4);

  /* Initialize the mask data */
  if (alphaInfo != OS.kCGImageAlphaFirst) {
    OS.memset(iconPtr[0] + PixMap.sizeof + 2 * BitMap.sizeof + 4, -1, maskSize);
  } else {
    byte[] srcData = new byte[pixmapSize];
    OS.memcpy(srcData, image.data, pixmapSize);
    byte[] maskData = new byte[maskSize];
    int offset = 0, maskOffset = 0;
    for (int y = 0; y<height; y++) {
      for (int x = 0; x<width; x++) {
        if ((srcData[offset] & 0xFF) > 128) {
          maskData[maskOffset + (x >> 3)] |= (1 << (7 - (x & 0x7)));
        } else {
          maskData[maskOffset + (x >> 3)] &= ~(1 << (7 - (x & 0x7)));
        }
        offset += 4;
      }
      maskOffset += maskBpl;
    }
    OS.memcpy(iconPtr[0] + PixMap.sizeof + 2 * BitMap.sizeof + 4, maskData, maskData.length);
  }
 
  OS.HUnlock(iconHandle)
  return iconHandle;
}

void createHandle () {
}

int createIconRef (Image image) {
  int imageHandle = image.handle;
  int imageData = image.data;
  int width = OS.CGImageGetWidth(imageHandle);
  int height = OS.CGImageGetHeight(imageHandle);
  int bpr = OS.CGImageGetBytesPerRow(imageHandle);
  int alphaInfo = OS.CGImageGetAlphaInfo(imageHandle);
 
  int type = 0, maskType = 0;
  if (width == 16 && height == 16) {
    type = OS.kSmall32BitData;
    maskType = OS.kSmall8BitMask;
  } else if (width == 32 && height == 32) {
    type = OS.kLarge32BitData;
    maskType = OS.kLarge8BitMask;
  } else if (width == 48 && height == 48) {
    type = OS.kHuge32BitData;
    maskType = OS.kHuge8BitMask;
  } else if (width == 128 && height == 128) {
    type = OS.kThumbnail32BitData;
    maskType = OS.kThumbnail8BitMask;
  } else {
    type = OS.kSmall32BitData;
    maskType = OS.kSmall8BitMask;
    int size = 16;
    if (width > 16 || height > 16) {
      type = OS.kHuge32BitData;
      maskType = OS.kHuge8BitMask;
      size = 32;
    }
    if (width > 32 || height > 32) {
      type = OS.kHuge32BitData;
      maskType = OS.kHuge8BitMask;
      size = 48;     
    }
    if (width > 48 || height > 48) {
      type = OS.kThumbnail32BitData;
      maskType = OS.kThumbnail8BitMask;
      size = 128;
    }
    width = height = size;
    bpr = width * 4;
    int dataSize = height * bpr;
    imageData = OS.NewPtr(dataSize);
    if (imageData == 0) SWT.error(SWT.ERROR_NO_HANDLES);
    int colorspace = OS.CGColorSpaceCreateDeviceRGB();
    if (colorspace == 0) SWT.error(SWT.ERROR_NO_HANDLES);
    int context = OS.CGBitmapContextCreate(imageData, width, height, 8, bpr, colorspace, OS.kCGImageAlphaNoneSkipFirst);
    OS.CGColorSpaceRelease(colorspace);
    if (context == 0) SWT.error(SWT.ERROR_NO_HANDLES);
    CGRect rect = new CGRect();
    rect.width = width;
    rect.height = height;
    OS.CGContextDrawImage(context, rect, imageHandle);
    OS.CGContextRelease(context);   
  }
  if (type == 0) return 0;
 
  int iconFamily = OS.NewHandle(0);
  if (iconFamily == 0) SWT.error(SWT.ERROR_NO_HANDLES);
 
  int dataSize = height * bpr;
  int dataHandle = OS.NewHandle(dataSize);
  if (dataHandle == 0) SWT.error(SWT.ERROR_NO_HANDLES);
  int[] dataPtr = new int[1];
  OS.HLock(dataHandle);
  OS.memcpy(dataPtr, dataHandle, 4);
  OS.memcpy(dataPtr[0], imageData, dataSize);
  OS.HUnlock(dataHandle);
  OS.SetIconFamilyData(iconFamily, type, dataHandle);
  OS.DisposeHandle(dataHandle);

  /* Initialize the mask data */
  int maskSize = width * height;
  int maskHandle = OS.NewHandle (maskSize)
  if (maskHandle == 0) SWT.error(SWT.ERROR_NO_HANDLES);
  OS.HLock(maskHandle);
  int[] maskPtr = new int[1];
  OS.memcpy(maskPtr, maskHandle, 4);
  if (alphaInfo != OS.kCGImageAlphaFirst) {
    OS.memset(maskPtr[0], 0xFF, maskSize);
  } else {
    byte[] srcData = new byte[dataSize];
    OS.memcpy(srcData, imageData, dataSize);
    byte[] maskData = new byte[maskSize];
    int offset = 0, maskOffset = 0;
    for (int y = 0; y<height; y++) {
      for (int x = 0; x<width; x++) {
        maskData[maskOffset++] = srcData[offset];
        offset += 4;
      }
    }
    OS.memcpy(maskPtr[0], maskData, maskData.length);
  }
  OS.HUnlock(maskHandle);
  OS.SetIconFamilyData(iconFamily, maskType, maskHandle);
  OS.DisposeHandle(maskHandle);
 
  if (imageData != image.data) OS.DisposePtr(imageData);

  /* Create the icon ref */
  int[] iconRef = new int[1];
  OS.HLock(iconFamily);
  int[] iconPtr = new int[1];
  OS.memcpy(iconPtr, iconFamily, 4);
  OS.GetIconRefFromIconFamilyPtr(iconPtr[0], OS.GetHandleSize(iconFamily), iconRef);
  OS.HUnlock(iconFamily)
  OS.DisposeHandle(iconFamily);
  return iconRef[0];
}

void createWidget () {
  createHandle ();
  register ();
  hookEvents ();
}

int commandProc (int nextHandler, int theEvent, int userData) {
  int eventKind = OS.GetEventKind (theEvent);
  switch (eventKind) {
    case OS.kEventProcessCommand:  return kEventProcessCommand (nextHandler, theEvent, userData);
  }
  return OS.eventNotHandledErr;
}
 
void deregister () {
}

void destroyWidget () {
  releaseHandle ();
}

void destroyCIcon (int iconHandle) {
  OS.HLock(iconHandle);
 
  /* Dispose the ColorTable */
  int[] iconPtr = new int[1];
  OS.memcpy(iconPtr, iconHandle, 4)
  PixMap iconPMap = new PixMap();
  OS.memcpy(iconPMap, iconPtr[0], PixMap.sizeof);
  if (iconPMap.pmTable != 0) OS.DisposeHandle(iconPMap.pmTable);

  /* Dispose the icon data */
  int[] iconData = new int[1];
  OS.memcpy(iconData, iconPtr[0] + PixMap.sizeof + 2 * BitMap.sizeof, 4);
  if (iconData[0] != 0) OS.DisposeHandle(iconData[0]);
 
  OS.HUnlock(iconHandle);
 
  /* Dispose the icon */
  OS.DisposeHandle(iconHandle);
}

int drawItemProc (int browser, int item, int property, int itemState, int theRect, int gdDepth, int colorDevice) {
  return OS.noErr;
}

/**
* Disposes of the operating system resources associated with
* the receiver and all its descendents. After this method has
* been invoked, the receiver and all descendents will answer
* <code>true</code> when sent the message <code>isDisposed()</code>.
* Any internal connections between the widgets in the tree will
* have been removed to facilitate garbage collection.
* <p>
* NOTE: This method is not called recursively on the descendents
* of the receiver. This means that, widget implementers can not
* detect when a widget is being disposed of by re-implementing
* this method, but should instead listen for the <code>Dispose</code>
* event.
* </p>
*
* @exception SWTException <ul>
*    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see #addDisposeListener
* @see #removeDisposeListener
* @see #checkWidget
*/
public void dispose () {
  /*
  * Note:  It is valid to attempt to dispose a widget
  * more than once.  If this happens, fail silently.
  */
  if (isDisposed ()) return;
  if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
  release (true);
}

void drawBackground (int control, int context) {
  /* Do nothing */
}

void drawWidget (int control, int context, int damageRgn, int visibleRgn, int theEvent) {
}

void error (int code) {
  SWT.error(code);
}

boolean filters (int eventType) {
  return display.filters (eventType);
}

int fixMnemonic (char [] buffer) {
  int i=0, j=0;
  while (i < buffer.length) {
    if ((buffer [j++] = buffer [i++]) == '&') {
      if (i == buffer.length) {continue;}
      if (buffer [i] == '&') {i++; continue;}
      j--;
    }
  }
  return j;
}

Rectangle getControlBounds (int control) {
  if (OS.HIVIEW) {
    CGRect rect = new CGRect ();
    OS.HIViewGetFrame (control, rect);
    Rect inset = getInset ();
    rect.x -= inset.left;
    rect.y -= inset.top;
    rect.width += inset.right + inset.left;
    rect.height += inset.bottom + inset.top;
    return new Rectangle ((int) rect.x, (int) rect.y, (int) rect.width, (int) rect.height);
  }
  Rect rect = new Rect();
  OS.GetControlBounds (control, rect);
  int window = OS.GetControlOwner (control);
  int [] theRoot = new int [1];
  OS.GetRootControl (window, theRoot);
  int [] parentHandle = new int [1];
  OS.GetSuperControl (control, parentHandle);
  if (parentHandle [0] != theRoot [0]) {
    Rect parentRect = new Rect ();
    OS.GetControlBounds (parentHandle [0], parentRect);
    OS.OffsetRect (rect, (short) -parentRect.left, (short) -parentRect.top);
  }
  Rect inset = getInset ();
  rect.left -= inset.left;
  rect.top -= inset.top;
  rect.right += inset.right;
  rect.bottom += inset.bottom;
  return new Rectangle (rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top);
}

Point getControlSize (int control) {
  if (OS.HIVIEW) {
    CGRect rect = new CGRect ();
    OS.HIViewGetFrame (control, rect);
    Rect inset = getInset ();
    int width = (int) rect.width + inset.left + inset.right;
    int height = (int) rect.height + inset.top + inset.bottom;
    return new Point (width, height);
  }
  Rect rect = new Rect ();
  OS.GetControlBounds (control, rect);
  Rect inset = getInset ();
  rect.left -= inset.left;
  rect.top -= inset.top;
  rect.right += inset.right;
  rect.bottom += inset.bottom;
  return new Point (rect.right - rect.left, rect.bottom - rect.top);
}

/**
* Returns the application defined widget data associated
* with the receiver, or null if it has not been set. The
* <em>widget data</em> is a single, unnamed field that is
* stored with every widget.
* <p>
* Applications may put arbitrary objects in this field. If
* the object stored in the widget data needs to be notified
* when the widget is disposed of, it is the application's
* responsibility to hook the Dispose event on the widget and
* do so.
* </p>
*
* @return the widget data
*
* @exception SWTException <ul>
*    <li>ERROR_WIDGET_DISPOSED - when the receiver has been disposed</li>
*    <li>ERROR_THREAD_INVALID_ACCESS - when called from the wrong thread</li>
* </ul>
*
* @see #setData(Object)
*/
public Object getData () {
  checkWidget();
  return (state & KEYED_DATA) != 0 ? ((Object []) data) [0] : data;
}

/**
* Returns the application defined property of the receiver
* with the specified name, or null if it has not been set.
* <p>
* Applications may have associated arbitrary objects with the
* receiver in this fashion. If the objects stored in the
* properties need to be notified when the widget is disposed
* of, it is the application's responsibility to hook the
* Dispose event on the widget and do so.
* </p>
*
* @param  key the name of the property
* @return the value of the property or null if it has not been set
*
* @exception IllegalArgumentException <ul>
*    <li>ERROR_NULL_ARGUMENT - if the key 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 #setData(String, Object)
*/
public Object getData (String key) {
  checkWidget();
  if (key == null) error (SWT.ERROR_NULL_ARGUMENT);
  if ((state & KEYED_DATA) != 0) {
    Object [] table = (Object []) data;
    for (int i=1; i<table.length; i+=2) {
      if (key.equals (table [i])) return table [i+1];
    }
  }
  return null;
}

/**
* Returns the <code>Display</code> that is associated with
* the receiver.
* <p>
* A widget's display is either provided when it is created
* (for example, top level <code>Shell</code>s) or is the
* same as its parent's display.
* </p>
*
* @return the receiver's display
*
* @exception SWTException <ul>
*    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* </ul>
*/
public Display getDisplay () {
  Display display = this.display;
  if (display == null) error (SWT.ERROR_WIDGET_DISPOSED);
  return display;
}

int getDrawCount (int control) {
  return 0;
}

Rect getInset () {
  return EMPTY_RECT;
}

String getName () {
  String string = getClass ().getName ();
  int index = string.lastIndexOf ('.');
  if (index == -1) return string;
  return string.substring (index + 1, string.length ());
}

String getNameText () {
  return "";
}

/**
* Returns the receiver's style information.
* <p>
* Note that the value which is returned by this method <em>may
* not match</em> the value which was provided to the constructor
* when the receiver was created. This can occur when the underlying
* operating system does not support a particular combination of
* requested styles. For example, if the platform widget used to
* implement a particular SWT widget always has scroll bars, the
* result of calling this method would always have the
* <code>SWT.H_SCROLL</code> and <code>SWT.V_SCROLL</code> bits set.
* </p>
*
* @return the style bits
*
* @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 getStyle () {
  checkWidget();
  return style;
}

int getVisibleRegion (int control, boolean clipChildren) {
  int visibleRgn = OS.NewRgn ();
  calculateVisibleRegion (control, visibleRgn, clipChildren);
  return visibleRgn;
}

int helpProc (int inControl, int inGlobalMouse, int inRequest, int outContentProvided, int ioHelpContent) {
  return OS.eventNotHandledErr;
}

int hitTestProc (int browser, int item, int property, int theRect, int mouseRect) {
  /* Return true to indicate that the item can be selected */
  return 1;
}

void hookEvents () {
}

boolean hooks (int eventType) {
  if (eventTable == null) return false;
  return eventTable.hooks (eventType);
}

void invalidateVisibleRegion (int control) {
}

void invalWindowRgn (int window, int rgn) {
  OS.InvalWindowRgn (window, rgn);
}

/**
* Returns <code>true</code> if the widget has been disposed,
* and <code>false</code> otherwise.
* <p>
* This method gets the dispose state for the widget.
* When a widget has been disposed, it is an error to
* invoke any other method using the widget.
* </p>
*
* @return <code>true</code> when the widget is disposed and <code>false</code> otherwise
*/
public boolean isDisposed () {
  return (state & DISPOSED) != 0;
}

boolean isDrawing (int control) {
  return OS.IsControlVisible (control) && getDrawCount (control) == 0;
}

boolean isEnabled () {
  return true;
}

/**
* Returns <code>true</code> if there are any listeners
* for the specified event type associated with the receiver,
* and <code>false</code> otherwise. The event type is one of
* the event constants defined in class <code>SWT</code>.
*
* @param eventType the type of event
* @return true if the event is hooked
*
* @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 SWT
*/
public boolean isListening (int eventType) {
  checkWidget();
  return hooks (eventType);
}

boolean isTrimHandle (int trimHandle) {
  return false;
}

boolean isValidSubclass () {
  return Display.isValidClass (getClass ());
}

boolean isValidThread () {
  return getDisplay ().isValidThread ();
}

int itemCompareProc (int browser, int itemOne, int itemTwo, int sortProperty) {
  return OS.noErr;
}

int itemDataProc (int browser, int item, int property, int itemData, int setValue) {
  return OS.noErr;
}

int itemNotificationProc (int browser, int item, int message) {
  return OS.noErr;
}

int kEventAccessibleGetChildAtPoint (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventAccessibleGetAllAttributeNames (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventAccessibleGetNamedAttribute (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventProcessCommand (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventControlApplyBackground (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}
 
int kEventControlActivate (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventControlBoundsChanged (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventControlClick (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventControlContextualMenuClick (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventControlDeactivate (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventControlDraw (int nextHandler, int theEvent, int userData) {
  int [] theControl = new int [1];
  OS.GetEventParameter (theEvent, OS.kEventParamDirectObject, OS.typeControlRef, null, 4, null, theControl);
  int [] region = new int [1]
  OS.GetEventParameter (theEvent, OS.kEventParamRgnHandle, OS.typeQDRgnHandle, null, 4, null, region);
  if (OS.HIVIEW) {
    boolean oldInPaint = display.inPaint;
    display.inPaint = true;
    int[] context = new int [1];
    OS.GetEventParameter (theEvent, OS.kEventParamCGContextRef, OS.typeCGContextRef, null, 4, null, context);
    int visibleRgn = region [0];
    drawBackground (theControl [0], context [0]);
    callPaintEventHandler (theControl [0], region [0], visibleRgn, theEvent, nextHandler);
    drawWidget (theControl [0], context [0], region [0], visibleRgn, theEvent);
    display.inPaint = oldInPaint;
  } else {
    if (getDrawCount (theControl [0]) > 0) return OS.noErr;
    int visibleRgn = getVisibleRegion (theControl [0], true);
    OS.SectRgn(region [0], visibleRgn, visibleRgn);
    if (!OS.EmptyRgn (visibleRgn)) {
      int [] port = new int [1];
      OS.GetPort (port);
      OS.LockPortBits (port [0]);
//      OS.QDSetDirtyRegion (port, visibleRgn);
      int oldClip = OS.NewRgn ();
      OS.GetClip (oldClip);
      OS.SetClip (visibleRgn);
      drawBackground (theControl [0], 0);
      callPaintEventHandler (theControl [0], region [0], visibleRgn, theEvent, nextHandler);
      drawWidget (theControl [0], 0, region [0], visibleRgn, theEvent);
      OS.SetClip (oldClip);
      OS.DisposeRgn (oldClip);
      OS.UnlockPortBits (port [0]);
    }
    OS.DisposeRgn (visibleRgn);
  }
  return OS.noErr;
}

int kEventControlGetClickActivation (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

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

int kEventControlHit (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventControlHitTest (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventControlSetCursor (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventControlSetFocusPart (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventControlTrack (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventMenuCalculateSize (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventMenuClosed (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventMenuCreateFrameView (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventMenuDrawItem (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventMenuDrawItemContent (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventMenuGetFrameBounds (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventMenuMeasureItemWidth (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventMenuOpening (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventMenuTargetItem (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventMouseDown (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventMouseDragged (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventMouseMoved (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventMouseUp (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventMouseWheelMoved (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventRawKeyDown (int nextHandler, int theEvent, int userData) {
  return kEventRawKeyPressed (nextHandler, theEvent, userData);
}

int kEventRawKeyModifiersChanged (int nextHandler, int theEvent, int userData) {
  Display display = this.display;
  int [] modifiers = new int [1];
  OS.GetEventParameter (theEvent, OS.kEventParamKeyModifiers, OS.typeUInt32, null, modifiers.length * 4, null, modifiers);
  int lastModifiers = display.lastModifiers;
  int chord = OS.GetCurrentEventButtonState ();
  int type = SWT.KeyUp;
  if ((modifiers [0] & OS.alphaLock) != 0 && (lastModifiers & OS.alphaLock) == 0) type = SWT.KeyDown;
  if ((modifiers [0] & OS.shiftKey) != 0 && (lastModifiers & OS.shiftKey) == 0) type = SWT.KeyDown;
  if ((modifiers [0] & OS.controlKey) != 0 && (lastModifiers & OS.controlKey) == 0) type = SWT.KeyDown;
  if ((modifiers [0] & OS.cmdKey) != 0 && (lastModifiers & OS.cmdKey) == 0) type = SWT.KeyDown;
  if ((modifiers [0] & OS.optionKey) != 0 && (lastModifiers & OS.optionKey) == 0) type = SWT.KeyDown;
  if (type == SWT.KeyUp && (modifiers [0] & OS.alphaLock) == 0 && (lastModifiers & OS.alphaLock) != 0) {
    Event event = new Event ();
    event.keyCode = SWT.CAPS_LOCK;
    setInputState (event, SWT.KeyDown, chord, modifiers [0]);
    sendKeyEvent (SWT.KeyDown, event);
  }
  Event event = new Event ();
  setInputState (event, type, chord, modifiers [0]);
  if (event.keyCode == 0 && event.character == 0) return OS.eventNotHandledErr;
  boolean result = sendKeyEvent (type, event);
  if (type == SWT.KeyDown && (modifiers [0] & OS.alphaLock) != 0 && (lastModifiers & OS.alphaLock) == 0) {
    event = new Event ();
    event.keyCode = SWT.CAPS_LOCK;
    setInputState (event, SWT.KeyUp, chord, modifiers [0]);
    sendKeyEvent (SWT.KeyUp, event);
  }
  display.lastModifiers = modifiers [0];
  return result ? OS.eventNotHandledErr : OS.noErr;
}

int kEventRawKeyPressed (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventRawKeyRepeat (int nextHandler, int theEvent, int userData) {
  return kEventRawKeyPressed (nextHandler, theEvent, userData);
}

int kEventRawKeyUp (int nextHandler, int theEvent, int userData) {
  if (!sendKeyEvent (SWT.KeyUp, theEvent)) return OS.noErr;
  return OS.eventNotHandledErr;
}

int kEventTextInputUnicodeForKeyEvent (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventWindowActivated (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventWindowBoundsChanged (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventWindowClose (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventWindowCollapsed (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventWindowDeactivated (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventWindowDrawContent (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventWindowExpanded (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventWindowGetClickModality (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventWindowGetRegion (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventWindowHidden (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventWindowHitTest (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventWindowShown (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int kEventWindowUpdate (int nextHandler, int theEvent, int userData) {
  return OS.eventNotHandledErr;
}

int keyboardProc (int nextHandler, int theEvent, int userData) {
  int eventKind = OS.GetEventKind (theEvent);
  switch (eventKind) {
    case OS.kEventRawKeyDown:        return kEventRawKeyDown (nextHandler, theEvent, userData);
    case OS.kEventRawKeyModifiersChanged:  return kEventRawKeyModifiersChanged (nextHandler, theEvent, userData);
    case OS.kEventRawKeyRepeat:      return kEventRawKeyRepeat (nextHandler, theEvent, userData);
    case OS.kEventRawKeyUp:        return kEventRawKeyUp (nextHandler, theEvent, userData);
  }
  return OS.eventNotHandledErr;
}

int menuProc (int nextHandler, int theEvent, int userData) { 
  int eventKind = OS.GetEventKind (theEvent);
  switch (eventKind) {
    case OS.kEventMenuCalculateSize:    return kEventMenuCalculateSize (nextHandler, theEvent, userData);
    case OS.kEventMenuClosed:        return kEventMenuClosed (nextHandler, theEvent, userData);
    case OS.kEventMenuCreateFrameView:  return kEventMenuCreateFrameView (nextHandler, theEvent, userData);
    case OS.kEventMenuDrawItem:       return kEventMenuDrawItem (nextHandler, theEvent, userData);
    case OS.kEventMenuDrawItemContent:   return kEventMenuDrawItemContent (nextHandler, theEvent, userData);
    case OS.kEventMenuGetFrameBounds:   return kEventMenuGetFrameBounds (nextHandler, theEvent, userData);
    case OS.kEventMenuMeasureItemWidth:   return kEventMenuMeasureItemWidth (nextHandler, theEvent, userData);
    case OS.kEventMenuOpening:      return kEventMenuOpening (nextHandler, theEvent, userData);
    case OS.kEventMenuTargetItem:      return kEventMenuTargetItem (nextHandler, theEvent, userData);
  }
  return OS.eventNotHandledErr;
}

int mouseProc (int nextHandler, int theEvent, int userData) {
  int eventKind = OS.GetEventKind (theEvent);
  switch (eventKind) {
    case OS.kEventMouseDown:     return kEventMouseDown (nextHandler, theEvent, userData);
    case OS.kEventMouseUp:     return kEventMouseUp (nextHandler, theEvent, userData);
    case OS.kEventMouseDragged:  return kEventMouseDragged (nextHandler, theEvent, userData);
//    case OS.kEventMouseEntered:    return kEventMouseEntered (nextHandler, theEvent, userData);
//    case OS.kEventMouseExited:    return kEventMouseExited (nextHandler, theEvent, userData);
    case OS.kEventMouseMoved:    return kEventMouseMoved (nextHandler, theEvent, userData);
    case OS.kEventMouseWheelMoved:  return kEventMouseWheelMoved (nextHandler, theEvent, userData);
  }
  return OS.eventNotHandledErr;
}

/**
* Notifies all of the receiver's listeners for events
* of the given type that one such event has occurred by
* invoking their <code>handleEvent()</code> method.  The
* event type is one of the event constants defined in class
* <code>SWT</code>.
*
* @param eventType the type of event which has occurred
* @param event the event data
*
* @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 SWT
* @see #addListener
* @see #removeListener
*/
public void notifyListeners (int eventType, Event event) {
  checkWidget();
  if (event == null) event = new Event ();
  sendEvent (eventType, event);
}

void postEvent (int eventType) {
  sendEvent (eventType, null, false);
}

void postEvent (int eventType, Event event) {
  sendEvent (eventType, event, false);
}

void redrawChildren (int control) {
  int child = OS.HIViewGetFirstSubview (control);
  while (child != 0) {
    OS.HIViewSetNeedsDisplay (child, true);
    redrawChildren (child);
    child = OS.HIViewGetNextView (child);
  }
}

void redrawChildren (int control, int rgn) {
  int child = OS.HIViewGetFirstSubview (control);
  while (child != 0) {
    OS.HIViewConvertRegion(rgn, control, child);
    OS.HIViewSetNeedsDisplayInRegion (child, rgn, true);
    redrawChildren (child, rgn);
    OS.HIViewConvertRegion(rgn, child, control);
    child = OS.HIViewGetNextView (child);
  }
}

void redrawWidget (int control, boolean children) {
  if (OS.HIVIEW) {
    if (display.inPaint) {
      int rgn = OS.NewRgn ();
      Rect rect = new Rect ();
      OS.GetControlBounds (control, rect);
      rect.right += rect.left;
      rect.bottom += rect.top;
      rect.top = rect.left = 0;
      OS.RectRgn (rgn, rect);
      OS.HIViewConvertRegion (rgn, control, 0);
      invalWindowRgn (0, rgn);
      OS.DisposeRgn (rgn);
    } else {
      OS.HIViewSetNeedsDisplay (control, true);
      if (children) redrawChildren (control);
    }
    return;
  }
  if (!isDrawing (control)) return;
  int window = OS.GetControlOwner (control);
  int visibleRgn = getVisibleRegion (control, !children);
  invalWindowRgn (window, visibleRgn);
  OS.DisposeRgn (visibleRgn);
}

void redrawWidget (int control, int x, int y, int width, int height, boolean children) {
  if (OS.HIVIEW) {
    int rgn = OS.NewRgn ();
    Rect rect = new Rect ();
    OS.SetRect (rect, (short) x, (short) y, (short) (x + width), (short) (y + height));
    OS.RectRgn (rgn, rect);
    if (display.inPaint) {
      OS.HIViewConvertRegion (rgn, control, 0);
      invalWindowRgn (0, rgn);
    } else {
      OS.HIViewSetNeedsDisplayInRegion (control, rgn, true);
      if (children) redrawChildren (control, rgn);
    }
    OS.DisposeRgn (rgn);
    return;
  }
  if (!isDrawing (control)) return;
  Rect rect = new Rect ();
  OS.GetControlBounds (control, rect);
  x += rect.left;
  y += rect.top;
  OS.SetRect (rect, (short) x, (short) y, (short) (x + width), (short) (y + height));
  int rectRgn = OS.NewRgn();
  OS.RectRgn (rectRgn, rect);
  int visibleRgn = getVisibleRegion (control, !children);
  OS.SectRgn (rectRgn, visibleRgn, visibleRgn);
  int window = OS.GetControlOwner (control);
  invalWindowRgn (window, visibleRgn);
  OS.DisposeRgn (rectRgn);
  OS.DisposeRgn (visibleRgn);
}

void register () {
}

void release (boolean destroy) {
  if ((state & DISPOSE_SENT) == 0) {
    state |= DISPOSE_SENT;
    sendEvent (SWT.Dispose);
  }
  if ((state & DISPOSED) == 0) {
    releaseChildren (destroy);
  }
  if ((state & RELEASED) == 0) {
    state |= RELEASED;
    if (destroy) {
      releaseParent ();
      releaseWidget ();
      destroyWidget ();
    } else {
      releaseWidget ();
      releaseHandle ();
    }
  }
}

void releaseChildren (boolean destroy) {
}

void releaseHandle () {
  state |= DISPOSED;
  display = null;
}

void releaseParent () {
  /* Do nothing */
}

void releaseWidget () {
  deregister ();
  eventTable = null;
  data = null;
}

/**
* Removes the listener from the collection of listeners who will
* be notified when an event of the given type occurs. The event
* type is one of the event constants defined in class <code>SWT</code>.
*
* @param eventType the type of event to listen for
* @param listener the listener which should no longer be notified when the event occurs
*
* @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 Listener
* @see SWT
* @see #addListener
* @see #notifyListeners
*/
public void removeListener (int eventType, Listener handler) {
  checkWidget();
  if (handler == null) error (SWT.ERROR_NULL_ARGUMENT);
  if (eventTable == null) return;
  eventTable.unhook (eventType, handler);
}

/**
* Removes the listener from the collection of listeners who will
* be notified when an event of the given type occurs.
* <p>
* <b>IMPORTANT:</b> This method is <em>not</em> part of the SWT
* public API. It is marked public only so that it can be shared
* within the packages provided by SWT. It should never be
* referenced from application code.
* </p>
*
* @param eventType the type of event to listen for
* @param listener the listener which should no longer be notified when the event occurs
*
* @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 Listener
* @see #addListener
*/
protected void removeListener (int eventType, SWTEventListener handler) {
  checkWidget();
  if (handler == null) error (SWT.ERROR_NULL_ARGUMENT);
  if (eventTable == null) return;
  eventTable.unhook (eventType, handler);
}

/**
* Removes the listener from the collection of listeners who will
* be notified when the widget is disposed.
*
* @param listener the listener which should no longer be notified when the receiver is disposed
*
* @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 DisposeListener
* @see #addDisposeListener
*/
public void removeDisposeListener (DisposeListener listener) {
  checkWidget();
  if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
  if (eventTable == null) return;
  eventTable.unhook (SWT.Dispose, listener);
}

void sendEvent (Event event) {
  Display display = event.display;
  if (!display.filterEvent (event)) {
    if (eventTable != null) eventTable.sendEvent (event);
  }
}

void sendEvent (int eventType) {
  sendEvent (eventType, null, true);
}

void sendEvent (int eventType, Event event) {
  sendEvent (eventType, event, true);
}

void sendEvent (int eventType, Event event, boolean send) {
  if (eventTable == null && !display.filters (eventType)) {
    return;
  }
  if (event == null) event = new Event ();
  event.type = eventType;
  event.display = display;
  event.widget = this;
  if (event.time == 0) {
    event.time = display.getLastEventTime ();
  }
  if (send) {
    sendEvent (event);
  } else {
    display.postEvent (event);
  }
}


boolean sendKeyEvent (int type, int theEvent) {
  int [] length = new int [1];
  int status = OS.GetEventParameter (theEvent, OS.kEventParamKeyUnicodes, OS.typeUnicodeText, null, 4, length, (char[])null);
  if (status == OS.noErr && length [0] > 2) {
    int count = 0;
    int [] chord = new int [1];
    OS.GetEventParameter (theEvent, OS.kEventParamMouseChord, OS.typeUInt32, null, 4, null, chord);
    int [] modifiers = new int [1];
    OS.GetEventParameter (theEvent, OS.kEventParamKeyModifiers, OS.typeUInt32, null, 4, null, modifiers);
    char [] chars = new char [length [0] / 2];
    OS.GetEventParameter (theEvent, OS.kEventParamKeyUnicodes, OS.typeUnicodeText, null, chars.length * 2, null, chars);
    for (int i=0; i<chars.length; i++) {
      Event event = new Event ();
      event.character = chars [i];
      setInputState (event, type, chord [0], modifiers [0]);
      if (sendKeyEvent (type, event)) chars [count++] = chars [i];
    }
    if (count == 0) return false;
    if (count != chars.length - 1) {
      OS.SetEventParameter (theEvent, OS.kEventParamKeyUnicodes, OS.typeUnicodeText, count * 2, chars);
    }
    return true;
  } else {
    Event event = new Event ();
    if (!setKeyState (event, type, theEvent)) return true;
    return sendKeyEvent (type, event);
  }
}

boolean sendKeyEvent (int type, Event event) {
  sendEvent (type, event);
  // widget could be disposed at this point
 
  /*
  * It is possible (but unlikely), that application
  * code could have disposed the widget in the key
  * events.  If this happens, end the processing of
  * the key by returning false.
  */
  if (isDisposed ()) return false;
  return event.doit;
}

int setBounds (int control, int x, int y, int width, int height, boolean move, boolean resize, boolean events) {
  boolean sameOrigin = true, sameExtent = true;
  if (OS.HIVIEW) {
    CGRect oldBounds = new CGRect ();
    OS.HIViewGetFrame (control, oldBounds);
    Rect inset = getInset ();
    oldBounds.x -= inset.left;
    oldBounds.y -= inset.top;
    oldBounds.width += inset.left + inset.right;
    oldBounds.height += inset.top + inset.bottom;
    if (!move) {
      x = (int) oldBounds.x;
      y = (int) oldBounds.y;
    }
    if (!resize) {
      width = (int) oldBounds.width;
      height = (int) oldBounds.height;
    }
    CGRect newBounds = new CGRect ();
    newBounds.x = x + inset.left;
    newBounds.y = y + inset.top;
    newBounds.width = width - inset.right - inset.left;
    newBounds.height = height - inset.bottom - inset.top;
    sameOrigin = newBounds.x == oldBounds.x && newBounds.y == oldBounds.y;
    sameExtent = newBounds.width == oldBounds.width && newBounds.height == oldBounds.height;
    if (sameOrigin && sameExtent) return 0;
    OS.HIViewSetFrame (control, newBounds);
    invalidateVisibleRegion (control);
  } else {
    /* Compute the old bounds */
    Rect oldBounds = new Rect ();
    OS.GetControlBounds (control, oldBounds);
    int [] theRoot = new int [1];
    int window = OS.GetControlOwner (control);
    OS.GetRootControl (window, theRoot);
    int [] parentHandle = new int [1];
    OS.GetSuperControl (control, parentHandle);
    Rect parentRect = new Rect ();
    if (parentHandle [0] != theRoot [0]) {
      OS.GetControlBounds (parentHandle [0], parentRect);
      OS.OffsetRect (oldBounds, (short) -parentRect.left, (short) -parentRect.top);
    }
    Rect inset = getInset ();
    oldBounds.left -= inset.left;
    oldBounds.top -= inset.top;
    oldBounds.right += inset.right;
    oldBounds.bottom += inset.bottom;
   
    /* Compute the new bounds */
    if (!move) {
      x = oldBounds.left;
      y = oldBounds.top;
    }
    if (!resize) {
      width = oldBounds.right - oldBounds.left;
      height = oldBounds.bottom - oldBounds.top;
   
    Rect newBounds = new Rect ();
    newBounds.left = (short) (parentRect.left + x + inset.left);
    newBounds.top = (short) (parentRect.top + y + inset.top);
    newBounds.right = (short) (newBounds.left + width - inset.right - inset.left);
    newBounds.bottom = (short) (newBounds.top + height - inset.bottom - inset.top)
    if (newBounds.bottom < newBounds.top) newBounds.bottom = newBounds.top;
    if (newBounds.right < newBounds.left) newBounds.right = newBounds.left;
 
    /* Get bounds again, since the one above is in SWT coordinates */
    OS.GetControlBounds (control, oldBounds);
   
    /* Check if anything changed */
    sameOrigin = newBounds.left == oldBounds.left && newBounds.top == oldBounds.top;
    sameExtent = (newBounds.right - newBounds.left) == (oldBounds.right - oldBounds.left) && (newBounds.bottom - newBounds.top) == (oldBounds.bottom - oldBounds.top);
    if (sameOrigin && sameExtent) return 0;
 
    /* Apply changes and invalidate appropriate rectangles */
    int tempRgn = 0;
    boolean visible = OS.IsControlVisible (control);
    if (visible) {
      tempRgn = OS.NewRgn ();
      OS.GetControlRegion (control, (short) OS.kControlStructureMetaPart, tempRgn);
      invalWindowRgn (window, tempRgn);
    }
    OS.SetControlBounds (control, newBounds);
    invalidateVisibleRegion (control);
    if (visible) {
      OS.GetControlRegion (control, (short) OS.kControlStructureMetaPart, tempRgn);
      invalWindowRgn (window, tempRgn);
      OS.DisposeRgn(tempRgn);
    }
  }
 
  /* Send events */
  int result = 0;
  if (move && !sameOrigin) {
    if (events) sendEvent (SWT.Move);
    result |= MOVED;
  }
  if (resize && !sameExtent) {
    if (events) sendEvent (SWT.Resize);
    result |= RESIZED;
  }
  return result;
}

/**
* Sets the application defined widget data associated
* with the receiver to be the argument. The <em>widget
* data</em> is a single, unnamed field that is stored
* with every widget.
* <p>
* Applications may put arbitrary objects in this field. If
* the object stored in the widget data needs to be notified
* when the widget is disposed of, it is the application's
* responsibility to hook the Dispose event on the widget and
* do so.
* </p>
*
* @param data the widget data
*
* @exception SWTException <ul>
*    <li>ERROR_WIDGET_DISPOSED - when the receiver has been disposed</li>
*    <li>ERROR_THREAD_INVALID_ACCESS - when called from the wrong thread</li>
* </ul>
*
* @see #getData()
*/
public void setData (Object data) {
  checkWidget();
  if ((state & KEYED_DATA) != 0) {
    ((Object []) this.data) [0] = data;
  } else {
    this.data = data;
  }
}

/**
* Sets the application defined property of the receiver
* with the specified name to the given value.
* <p>
* Applications may associate arbitrary objects with the
* receiver in this fashion. If the objects stored in the
* properties need to be notified when the widget is disposed
* of, it is the application's responsibility to hook the
* Dispose event on the widget and do so.
* </p>
*
* @param key the name of the property
* @param value the new value for the property
*
* @exception IllegalArgumentException <ul>
*    <li>ERROR_NULL_ARGUMENT - if the key 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 #getData(String)
*/
public void setData (String key, Object value) {
  checkWidget();
  if (key == null) error (SWT.ERROR_NULL_ARGUMENT);
  // GOOGLE: patched in from https://bugs.eclipse.org/bugs/show_bug.cgi?id=161259
  if (key.equals (CLEAR_GRAB_BIT)) {
    state &= ~GRAB;
    return;
 
  int index = 1;
  Object [] table = null;
  if ((state & KEYED_DATA) != 0) {
    table = (Object []) data;
    while (index < table.length) {
      if (key.equals (table [index])) break;
      index += 2;
    }
  }
  if (value != null) {
    if ((state & KEYED_DATA) != 0) {
      if (index == table.length) {
        Object [] newTable = new Object [table.length + 2];
        System.arraycopy (table, 0, newTable, 0, table.length);
        data = table = newTable;
      }
    } else {
      table = new Object [3];
      table [0] = data;
      data = table;
      state |= KEYED_DATA;
    }
    table [index] = key;
    table [index + 1] = value;
  } else {
    if ((state & KEYED_DATA) != 0) {
      if (index != table.length) {
        int length = table.length - 2;
        if (length == 1) {
          data = table [0];
          state &= ~KEYED_DATA;
        } else {
          Object [] newTable = new Object [length];
          System.arraycopy (table, 0, newTable, 0, index);
          System.arraycopy (table, index + 2, newTable, index, length - index);
          data = newTable;
        }
      }
    }
  }
}

boolean setInputState (Event event, int type, int chord, int modifiers) {
  if ((chord & 0x01) != 0) event.stateMask |= SWT.BUTTON1;
  if ((chord & 0x02) != 0) event.stateMask |= SWT.BUTTON3;
  if ((chord & 0x04) != 0) event.stateMask |= SWT.BUTTON2;
  if ((chord & 0x08) != 0) event.stateMask |= SWT.BUTTON4;
  if ((chord & 0x10) != 0) event.stateMask |= SWT.BUTTON5;
 
  if ((modifiers & OS.optionKey) != 0) event.stateMask |= SWT.ALT;
  if ((modifiers & OS.shiftKey) != 0) event.stateMask |= SWT.SHIFT;
  if ((modifiers & OS.controlKey) != 0) event.stateMask |= SWT.CONTROL;
  if ((modifiers & OS.cmdKey) != 0) event.stateMask |= SWT.COMMAND;
  switch (type) {
    case SWT.MouseDown:
    case SWT.MouseDoubleClick:
      if (event.button == 1) event.stateMask &= ~SWT.BUTTON1;
      if (event.button == 2) event.stateMask &= ~SWT.BUTTON2;
      if (event.button == 3event.stateMask &= ~SWT.BUTTON3;
      if (event.button == 4event.stateMask &= ~SWT.BUTTON4;
      if (event.button == 5event.stateMask &= ~SWT.BUTTON5;
      break;
    case SWT.MouseUp:
      if (event.button == 1) event.stateMask |= SWT.BUTTON1;
      if (event.button == 2) event.stateMask |= SWT.BUTTON2;
      if (event.button == 3) event.stateMask |= SWT.BUTTON3;
      if (event.button == 4) event.stateMask |= SWT.BUTTON4;
      if (event.button == 5) event.stateMask |= SWT.BUTTON5;
      break;
    case SWT.KeyDown:
    case SWT.Traverse: {
      if (event.keyCode != 0 || event.character != 0) return true;
      int lastModifiers = display.lastModifiers;
      if ((modifiers & OS.alphaLock) != 0 && (lastModifiers & OS.alphaLock) == 0) {
        event.keyCode = SWT.CAPS_LOCK;
        return true;
      }
      if ((modifiers & OS.shiftKey) != 0 && (lastModifiers & OS.shiftKey) == 0) {
        event.stateMask &= ~SWT.SHIFT;
        event.keyCode = SWT.SHIFT;
        return true;
      }
      if ((modifiers & OS.controlKey) != 0 && (lastModifiers & OS.controlKey) == 0) {
        event.stateMask &= ~SWT.CONTROL;
        event.keyCode = SWT.CONTROL;
        return true;
      }
      if ((modifiers & OS.cmdKey) != 0 && (lastModifiers & OS.cmdKey) == 0) {
        event.stateMask &= ~SWT.COMMAND;
        event.keyCode = SWT.COMMAND;
        return true;
     
      if ((modifiers & OS.optionKey) != 0 && (lastModifiers & OS.optionKey) == 0) {
        event.stateMask &= ~SWT.ALT;
        event.keyCode = SWT.ALT;
        return true;
      }
      break;
    }
    case SWT.KeyUp: {
      if (event.keyCode != 0 || event.character != 0) return true;
      int lastModifiers = display.lastModifiers;
      if ((modifiers & OS.alphaLock) == 0 && (lastModifiers & OS.alphaLock) != 0) {
        event.keyCode = SWT.CAPS_LOCK;
        return true;
      }
      if ((modifiers & OS.shiftKey) == 0 && (lastModifiers & OS.shiftKey) != 0) {
        event.stateMask |= SWT.SHIFT;
        event.keyCode = SWT.SHIFT;
        return true;
      }
      if ((modifiers & OS.controlKey) == 0 && (lastModifiers & OS.controlKey) != 0) {
        event.stateMask |= SWT.CONTROL;
        event.keyCode = SWT.CONTROL;
        return true;
      }
      if ((modifiers & OS.cmdKey) == 0 && (lastModifiers & OS.cmdKey) != 0) {
        event.stateMask |= SWT.COMMAND;
        event.keyCode = SWT.COMMAND;
        return true;
      }
      if ((modifiers & OS.optionKey) == 0 && (lastModifiers & OS.optionKey) != 0) {
        event.stateMask |= SWT.ALT;
        event.keyCode = SWT.ALT;
        return true;
      }
      break;
    }
  }
  return true;
}

boolean setKeyState (Event event, int type, int theEvent) {
  boolean isNull = false;
  int [] keyCode = new int [1];
  OS.GetEventParameter (theEvent, OS.kEventParamKeyCode, OS.typeUInt32, null, keyCode.length * 4, null, keyCode);
  event.keyCode = Display.translateKey (keyCode [0]);
  switch (event.keyCode) {
    case SWT.LF: {
      /*
      * Feature in the Macintosh.  When the numeric key pad
      * Enter key is pressed, it generates '\n'.  This is the
      * correct platform behavior but is not portable.  The
      * fix is to convert the '\n' into '\r'.
      */
      event.keyCode = SWT.KEYPAD_CR;
      event.character = '\r';
      break;
    }
    case SWT.BS: event.character = '\b'; break;
    case SWT.CR: event.character = '\r'; break;
    case SWT.DEL: event.character = 0x7F; break;
    case SWT.ESC: event.character = 0x1B; break;
    case SWT.TAB: event.character = '\t'; break;
    default: {
      if (event.keyCode == 0 || (SWT.KEYPAD_MULTIPLY <= event.keyCode && event.keyCode <= SWT.KEYPAD_CR)) {
        int [] length = new int [1];
        int status = OS.GetEventParameter (theEvent, OS.kEventParamKeyUnicodes, OS.typeUnicodeText, null, 4, length, (char[])null);
        if (status == OS.noErr && length [0] != 0) {
          char [] chars = new char [1];
          OS.GetEventParameter (theEvent, OS.kEventParamKeyUnicodes, OS.typeUnicodeText, null, 2, null, chars);
          event.character = chars [0];
        }
        /*
        * Bug in the Mactonish.  For some reason, Ctrl+Shift+'2' and Ctrl+Shift+'6'
        * fail to give 0x0 (^@ or ASCII NUL) and 0x1e (^^).  Other control character
        * key sequences such as ^A or even Ctrl+Shift+'-' (^_ or 0x1f) are correctly
        * translated to control characters.  Since it is not possible to know which
        * key combination gives '@' on an international keyboard, there is no way to
        * test for either character and convert it to a control character (Shift+'2'
        * gives '@' only on an English keyboard) to work around the problem.
        *
        * There is no fix at this time.
        */
      }
      if (event.keyCode == 0) {
        int kchrPtr = OS.GetScriptManagerVariable ((short) OS.smKCHRCache);
        if (display.kchrPtr != kchrPtr) {
          display.kchrPtr = kchrPtr;
          display.kchrState [0] = 0;
        }
        int result = OS.KeyTranslate (display.kchrPtr, (short)keyCode [0], display.kchrState);
        if (result <= 0x7f) {
          event.keyCode = result & 0x7f;
        } else {
          int [] encoding = new int [1];
          short keyScript = (short) OS.GetScriptManagerVariable ((short) OS.smKeyScript);
          short regionCode = (short) OS.GetScriptManagerVariable ((short) OS.smRegionCode);
          if (OS.UpgradeScriptInfoToTextEncoding (keyScript, (short) OS.kTextLanguageDontCare, regionCode, null, encoding) == OS.paramErr) {
            if (OS.UpgradeScriptInfoToTextEncoding (keyScript, (short) OS.kTextLanguageDontCare, (short) OS.kTextRegionDontCare, null, encoding) == OS.paramErr) {
              encoding [0] = OS.kTextEncodingMacRoman;
            }
          }
          int [] encodingInfo = new int [1];
          OS.CreateTextToUnicodeInfoByEncoding (encoding [0], encodingInfo);
          if (encodingInfo [0] != 0) {
            char [] chars = new char [1];
            int [] nchars = new int [1];
            byte [] buffer = new byte [2];
            buffer [0] = 1;
            buffer [1] = (byte) (result & 0xFF);
            OS.ConvertFromPStringToUnicode (encodingInfo [0], buffer, chars.length * 2, nchars, chars);
            OS.DisposeTextToUnicodeInfo (encodingInfo);
            event.keyCode = chars [0];
          }
        }
      }
      break;
    }
  }
  if (event.keyCode == 0 && event.character == 0) {
    if (!isNull) return false;
  }
  int [] chord = new int [1];
  OS.GetEventParameter (theEvent, OS.kEventParamMouseChord, OS.typeUInt32, null, 4, null, chord);
  int [] modifiers = new int [1];
  OS.GetEventParameter (theEvent, OS.kEventParamKeyModifiers, OS.typeUInt32, null, 4, null, modifiers);
  return setInputState (event, type, chord [0], modifiers [0]);
}

void setVisible (int control, boolean visible) {
  if (OS.HIVIEW) {
    OS.HIViewSetVisible (control, visible);
    invalidateVisibleRegion (control);
  } else {
    int visibleRgn = 0;
    boolean drawing = getDrawCount (control) == 0;
    if (drawing && !visible) visibleRgn = getVisibleRegion (control, false);
    OS.SetControlVisibility (control, visible, false);
    invalidateVisibleRegion (control);
    if (drawing && visible) visibleRgn = getVisibleRegion (control, false);
    if (drawing) {
      int window = OS.GetControlOwner (control);
      invalWindowRgn (window, visibleRgn);
      OS.DisposeRgn (visibleRgn);
    }
  }
}

void setZOrder (int control, int otheControl, boolean above) {
  if (OS.HIVIEW) {
    int inOp = above ?  OS.kHIViewZOrderAbove :  OS.kHIViewZOrderBelow;
    OS.HIViewSetZOrder (control, inOp, otheControl);
    invalidateVisibleRegion (control);
  } else {
    int inOp = above ?  OS.kHIViewZOrderBelow :  OS.kHIViewZOrderAbove;
    int oldRgn = 0;
    boolean drawing = isDrawing (control);
    if (drawing) oldRgn = getVisibleRegion (control, false);
    OS.HIViewSetZOrder (control, inOp, otheControl);
    invalidateVisibleRegion (control);
    if (drawing) {
      int newRgn = getVisibleRegion (control, false);
      if (above) {
        OS.DiffRgn (newRgn, oldRgn, newRgn);
      } else {
        OS.DiffRgn (oldRgn, newRgn, newRgn);
      }
      int window = OS.GetControlOwner (control);
      invalWindowRgn (window, newRgn);
      OS.DisposeRgn (oldRgn);
      OS.DisposeRgn (newRgn);
    }
  }
}

int textInputProc (int nextHandler, int theEvent, int userData) {
  int eventKind = OS.GetEventKind (theEvent);
  switch (eventKind) {
    case OS.kEventTextInputUnicodeForKeyEvent: return kEventTextInputUnicodeForKeyEvent (nextHandler, theEvent, userData);
  }
  return OS.eventNotHandledErr;
}

RGBColor toRGBColor (float [] color) {
  RGBColor rgb = new RGBColor ();
  rgb.red = (short) (color [0] * 0xffff);
  rgb.green = (short) (color [1] * 0xffff);
  rgb.blue = (short) (color [2] * 0xffff);
  return rgb;
}

/**
* Returns a string containing a concise, human-readable
* description of the receiver.
*
* @return a string representation of the receiver
*/
public String toString () {
  String string = "*Disposed*";
  if (!isDisposed ()) {
    string = "*Wrong Thread*";
    if (isValidThread ()) string = getNameText ();
  }
  return getName () + " {" + string + "}";
}

int trackingProc (int browser, int itemID, int property, int theRect, int startPt, int modifiers) {
  /* Return one to indicate that the data browser should process the click */
  return 1;
}

int windowProc (int nextHandler, int theEvent, int userData) {
  int eventKind = OS.GetEventKind (theEvent);
  switch (eventKind) {
    case OS.kEventWindowActivated:      return kEventWindowActivated (nextHandler, theEvent, userData)
    case OS.kEventWindowBoundsChanged:    return kEventWindowBoundsChanged (nextHandler, theEvent, userData);
    case OS.kEventWindowClose:        return kEventWindowClose (nextHandler, theEvent, userData);
    case OS.kEventWindowCollapsed:      return kEventWindowCollapsed (nextHandler, theEvent, userData);
    case OS.kEventWindowDeactivated:    return kEventWindowDeactivated (nextHandler, theEvent, userData);
    case OS.kEventWindowDrawContent:    return kEventWindowDrawContent (nextHandler, theEvent, userData);
    case OS.kEventWindowExpanded:      return kEventWindowExpanded (nextHandler, theEvent, userData);
    case OS.kEventWindowGetRegion:      return kEventWindowGetRegion (nextHandler, theEvent, userData);
    case OS.kEventWindowHidden:        return kEventWindowHidden (nextHandler, theEvent, userData);
    case OS.kEventWindowHitTest:      return kEventWindowHitTest (nextHandler, theEvent, userData);
    case OS.kEventWindowShown:        return kEventWindowShown (nextHandler, theEvent, userData);
    case OS.kEventWindowUpdate:        return kEventWindowUpdate (nextHandler, theEvent, userData);
    case OS.kEventWindowGetClickModality:  return kEventWindowGetClickModality (nextHandler, theEvent, userData);
  }
  return OS.eventNotHandledErr;
}

}
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Related Classes of org.eclipse.swt.widgets.Widget

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