bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/widgets/Group.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.*;
 import org.eclipse.swt.internal.motif.*;
 import org.eclipse.swt.graphics.*;
 import org.eclipse.swt.*;

 /**
  * Instances of this class provide an etched border
  * with an optional title.
  * <p>
  * Shadow styles are hints and may not be honoured
  * by the platform.  To create a group with the
  * default shadow style for the platform, do not
  * specify a shadow style.
  * <dl>
  * <dt><b>Styles:</b></dt>
  * <dd>SHADOW_ETCHED_IN, SHADOW_ETCHED_OUT, SHADOW_IN, SHADOW_OUT, SHADOW_NONE</dd>
  * <dt><b>Events:</b></dt>
  * <dd>(none)</dd>
  * </dl>
  * <p>
  * Note: Only one of the above styles 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/examples.php">SWT Example: ControlExample</a>
  * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
  */
 public class Group extends Composite {
 	int labelHandle;
 	String text = "";

 /**
  * 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#SHADOW_ETCHED_IN
  * @see SWT#SHADOW_ETCHED_OUT
  * @see SWT#SHADOW_IN
  * @see SWT#SHADOW_OUT
  * @see SWT#SHADOW_NONE
  * @see Widget#checkSubclass
  * @see Widget#getStyle
  */
 public Group (Composite parent, int style) {
 	super (parent, checkStyle (style));
 }
 static int checkStyle (int style) {
 	style |= SWT.NO_FOCUS;
 	/*
 	* 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) {
 	Point size = super.computeSize (wHint, hHint, changed);
 	if (OS.XtIsManaged (labelHandle)) {
 		int [] argList = {
 			OS.XmNshadowThickness, 0,
 			OS.XmNmarginWidth, 0,
 		};
 		OS.XtGetValues (handle, argList, argList.length / 2);
 		int thickness = argList [1];
 		int marginWidth = argList [3];
 		int borderWidth = getBorderWidth ();
 		int [] argList2 = {OS.XmNchildHorizontalSpacing, 0};
 		OS.XtGetValues (labelHandle, argList2, argList2.length / 2);
 		XtWidgetGeometry result = new XtWidgetGeometry ();
 		OS.XtQueryGeometry (labelHandle, null, result);
 		int titleWidth = result.width + 2 * (argList2 [1] + marginWidth + thickness + borderWidth);
 		size.x = Math.max (size.x, titleWidth);
 	}
 	return size;
 }
 public Rectangle computeTrim (int x, int y, int width, int height) {
 	checkWidget();
 	int trimX, trimY, trimWidth, trimHeight;
 	int [] argList = {
 		OS.XmNshadowThickness, 0,
 		OS.XmNmarginWidth, 0,
 		OS.XmNmarginHeight, 0
 	};
 	OS.XtGetValues (handle, argList, argList.length / 2);
 	int thickness = argList [1];
 	int marginWidth = argList [3];
 	int marginHeight = argList [5];
 	int borderWidth = getBorderWidth ();
 	trimX = x - marginWidth - thickness - borderWidth;
 	trimY = y - marginHeight - thickness - borderWidth;
 	trimWidth = width + ((marginWidth + thickness + borderWidth) * 2);
 	trimHeight = height + ((marginHeight + thickness + borderWidth) * 2);
 	if (OS.XtIsManaged (labelHandle)) {
 		int [] argList2 = {OS.XmNy, 0, OS.XmNheight, 0};
 		OS.XtGetValues (labelHandle, argList2, argList2.length / 2);
 		int titleHeight = ((short) argList2 [1]) + argList2 [3];
 		trimY = y - titleHeight;
 		trimHeight = height + titleHeight + (marginHeight + thickness + borderWidth);
 	}
 	return new Rectangle (trimX, trimY, trimWidth, trimHeight);
 }
 void createHandle (int index) {
 	state |= THEME_BACKGROUND;
 	/*
 	* Feature in Motif.  When a widget is managed or unmanaged,
 	* it may request and be granted, a new size in the OS.  This
 	* behavior is unwanted.  The fix is to create a parent for
 	* the list that will disallow geometry requests.
 	*/
 	int border = (style & SWT.BORDER) != 0 ? 1 : 0;
 	int [] argList1 = {
 		OS.XmNancestorSensitive, 1,
 		OS.XmNborderWidth, border,
 	};
 	int parentHandle = parent.handle;
 	formHandle = OS.XmCreateForm (parentHandle, null, argList1, argList1.length / 2);
 	if (formHandle == 0) error (SWT.ERROR_NO_HANDLES);
 	int [] argList2 = {
 		OS.XmNshadowType, shadowType (),
 		OS.XmNtopAttachment, OS.XmATTACH_FORM,
 		OS.XmNbottomAttachment, OS.XmATTACH_FORM,
 		OS.XmNleftAttachment, OS.XmATTACH_FORM,
 		OS.XmNrightAttachment, OS.XmATTACH_FORM,
 		OS.XmNresizable, 0,
 	};
 	handle = OS.XmCreateFrame (formHandle, null, argList2, argList2.length / 2);
 	if (handle == 0) error (SWT.ERROR_NO_HANDLES);
 	int [] argList3 = {OS.XmNframeChildType, OS.XmFRAME_TITLE_CHILD};
 	labelHandle = OS.XmCreateLabel (handle, null, argList3, argList3.length / 2);
 	if (labelHandle == 0) error (SWT.ERROR_NO_HANDLES);
 	int [] argList4 = {OS.XmNforeground, 0, OS.XmNbackground, 0};
 	OS.XtGetValues (handle, argList4, argList4.length / 2);
 	OS.XtSetValues (labelHandle, argList4, argList4.length / 2);
 }
 void deregister () {
 	super.deregister ();
 	display.removeWidget (labelHandle);
 }
 void enableWidget (boolean enabled) {
 	super.enableWidget (enabled);
 	enableHandle (enabled, labelHandle);
 }
 int fontHandle () {
 	return labelHandle;
 }
 public Rectangle getClientArea () {
 	checkWidget();
 	/*
 	* Bug in Motif. For some reason, if a form has not been realized,
 	* calling XtResizeWidget () on the form does not lay out properly.
 	* The fix is to force the widget to be realized by forcing the shell
 	* to be realized.
 	*/
 	if (!OS.XtIsRealized (handle)) getShell ().realizeWidget ();
 	int [] argList = {
 		OS.XmNwidth, 0,
 		OS.XmNheight, 0,
 		OS.XmNshadowThickness, 0,
 		OS.XmNmarginWidth, 0,
 		OS.XmNmarginHeight, 0
 	};
 	OS.XtGetValues (handle, argList, argList.length / 2);
 	int thickness = argList [5];
 	int marginWidth = argList [7];
 	int marginHeight = argList [9];
 	int borderWidth = getBorderWidth ();
 	int x = marginWidth + thickness + borderWidth;
 	int y = marginHeight + thickness + borderWidth;
 	int width = argList [1] - ((marginWidth + thickness + borderWidth) * 2);
 	int height = argList [3] - ((marginHeight + thickness + borderWidth) * 2);
 	if (OS.XtIsManaged (labelHandle)) {
 		int [] argList2 = {OS.XmNy, 0, OS.XmNheight, 0};
 		OS.XtGetValues (labelHandle, argList2, argList2.length / 2);
 		y = ((short) argList2 [1]) + argList2 [3];
 		height = argList [3] - y - (marginHeight + thickness + borderWidth);
 	}
 	return new Rectangle (x, y, width, height);
 }
 /**
  * Returns the receiver's text, which is the string that the
  * is used as the <em>title</em>. If the text has not previously
  * been set, returns an empty string.
  *
  * @return the text
  *
  * @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 String getText () {
 	checkWidget();
 	return text;
 }
 void hookEvents () {
 	super.hookEvents ();
 	int windowProc = display.windowProc;
 	OS.XtAddEventHandler (labelHandle, OS.ButtonPressMask, false, windowProc, BUTTON_PRESS);
 	OS.XtAddEventHandler (labelHandle, OS.ButtonReleaseMask, false, windowProc, BUTTON_RELEASE);
 	OS.XtAddEventHandler (labelHandle, OS.PointerMotionMask, false, windowProc, POINTER_MOTION);
 }
 boolean mnemonicHit (char key) {
 	return setFocus ();
 }
 boolean mnemonicMatch (char key) {
 	char mnemonic = findMnemonic (getText ());
 	if (mnemonic == '\0') return false;
 	return Character.toUpperCase (key) == Character.toUpperCase (mnemonic);
 }
 void propagateWidget (boolean enabled) {
 	super.propagateWidget (enabled);
 	propagateHandle (enabled, labelHandle, OS.None);
 }
 void redrawWidget (int x, int y, int width, int height, boolean redrawAll, boolean allChildren, boolean trim) {
 	super.redrawWidget (x, y, width, height, redrawAll, allChildren, trim);
 	short [] root_x = new short [1], root_y = new short [1];
 	OS.XtTranslateCoords (handle, (short) x, (short) y, root_x, root_y);
 	short [] label_x = new short [1], label_y = new short [1];
 	OS.XtTranslateCoords (labelHandle, (short) 0, (short) 0, label_x, label_y);
 	redrawHandle (root_x [0] - label_x [0], root_y [0] - label_y [0], width, height, redrawAll, labelHandle);
 }
 void register () {
 	super.register ();
 	display.addWidget (labelHandle, this);
 }
 void releaseHandle () {
 	super.releaseHandle ();
 	labelHandle = 0;
 }
 void setBackgroundPixel (int pixel) {
 	super.setBackgroundPixel (pixel);
 	int [] argList = {OS.XmNforeground, 0};
 	OS.XtGetValues (labelHandle, argList, argList.length / 2);
 	OS.XmChangeColor (labelHandle, pixel);
 	OS.XtSetValues (labelHandle, argList, argList.length / 2);
 }
 void setForegroundPixel (int pixel) {
 	int [] argList = {OS.XmNforeground, pixel};
 	OS.XtSetValues (labelHandle, argList, argList.length / 2);
 	super.setForegroundPixel (pixel);
 }
 void setParentBackground () {
 	super.setParentBackground ();
 	if (labelHandle != 0) setParentBackground (labelHandle);
 }
 /**
  * Sets the receiver's text, which is the string that will
  * be displayed as the receiver's <em>title</em>, to the argument,
  * which may not be null. The string may include the mnemonic character.
  * </p>
  * Mnemonics are indicated by an '&amp;' that causes the next
  * character to be the mnemonic.  When the user presses a
  * key sequence that matches the mnemonic, focus is assigned
  * to the first child of the group. On most platforms, the
  * mnemonic appears underlined but may be emphasised in a
  * platform specific manner.  The mnemonic indicator character
  * '&amp;' can be escaped by doubling it in the string, causing
  * a single '&amp;' to be displayed.
  * </p>
  * @param string the new text
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if the text 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 void setText (String string) {
 	checkWidget();
 	if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
 	text = string;
 	char [] text = new char [string.length ()];
 	string.getChars (0, text.length, text, 0);
 	int mnemonic = fixMnemonic (text);
 	byte [] buffer = Converter.wcsToMbcs (getCodePage (), text, true);
 	int xmString = OS.XmStringParseText (
 		buffer,
 		0,
 		OS.XmFONTLIST_DEFAULT_TAG,
 		OS.XmCHARSET_TEXT,
 		null,
 		0,
 		0);
 	if (xmString == 0) error (SWT.ERROR_CANNOT_SET_TEXT);
 	if (mnemonic == 0) mnemonic = OS.XK_VoidSymbol;
 	int [] argList = {
 		OS.XmNlabelType, OS.XmSTRING,
 		OS.XmNlabelString, xmString,
 		OS.XmNmnemonic, mnemonic,
 	};
 	OS.XtSetValues (labelHandle, argList, argList.length / 2);
 	if (xmString != 0) OS.XmStringFree (xmString);
 	if (string.length () == 0) {
 		OS.XtUnmanageChild (labelHandle);
 	} else {
 		OS.XtManageChild (labelHandle);
 	}
 }
 int shadowType () {
 	if ((style & SWT.SHADOW_IN) != 0) return OS.XmSHADOW_IN;
 	if ((style & SWT.SHADOW_OUT) != 0) return OS.XmSHADOW_OUT;
 	if ((style & SWT.SHADOW_ETCHED_IN) != 0) return OS.XmSHADOW_ETCHED_IN;
 	if ((style & SWT.SHADOW_ETCHED_OUT) != 0) return OS.XmSHADOW_ETCHED_OUT;
 	return OS.XmSHADOW_ETCHED_IN;
 }
 }
	/*******************************************************************************
	* 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.*;
	import org.eclipse.swt.internal.motif.*;
	import org.eclipse.swt.graphics.*;
	import org.eclipse.swt.*;

	/**
	* Instances of this class provide an etched border
	* with an optional title.
	* <p>
	* Shadow styles are hints and may not be honoured
	* by the platform. To create a group with the
	* default shadow style for the platform, do not
	* specify a shadow style.
	* <dl>
	* <dt><b>Styles:</b></dt>
	* <dd>SHADOW_ETCHED_IN, SHADOW_ETCHED_OUT, SHADOW_IN, SHADOW_OUT, SHADOW_NONE</dd>
	* <dt><b>Events:</b></dt>
	* <dd>(none)</dd>
	* </dl>
	* <p>
	* Note: Only one of the above styles 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/examples.php">SWT Example: ControlExample</a>
	* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
	*/
	public class Group extends Composite {
	int labelHandle;
	String text = "";

	/**
	* 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#SHADOW_ETCHED_IN
	* @see SWT#SHADOW_ETCHED_OUT
	* @see SWT#SHADOW_IN
	* @see SWT#SHADOW_OUT
	* @see SWT#SHADOW_NONE
	* @see Widget#checkSubclass
	* @see Widget#getStyle
	*/
	public Group (Composite parent, int style) {
	super (parent, checkStyle (style));
	}
	static int checkStyle (int style) {
	style \|= SWT.NO_FOCUS;
	/*
	* 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) {
	Point size = super.computeSize (wHint, hHint, changed);
	if (OS.XtIsManaged (labelHandle)) {
	int [] argList = {
	OS.XmNshadowThickness, 0,
	OS.XmNmarginWidth, 0,
	};
	OS.XtGetValues (handle, argList, argList.length / 2);
	int thickness = argList [1];
	int marginWidth = argList [3];
	int borderWidth = getBorderWidth ();
	int [] argList2 = {OS.XmNchildHorizontalSpacing, 0};
	OS.XtGetValues (labelHandle, argList2, argList2.length / 2);
	XtWidgetGeometry result = new XtWidgetGeometry ();
	OS.XtQueryGeometry (labelHandle, null, result);
	int titleWidth = result.width + 2 * (argList2 [1] + marginWidth + thickness + borderWidth);
	size.x = Math.max (size.x, titleWidth);
	}
	return size;
	}
	public Rectangle computeTrim (int x, int y, int width, int height) {
	checkWidget();
	int trimX, trimY, trimWidth, trimHeight;
	int [] argList = {
	OS.XmNshadowThickness, 0,
	OS.XmNmarginWidth, 0,
	OS.XmNmarginHeight, 0
	};
	OS.XtGetValues (handle, argList, argList.length / 2);
	int thickness = argList [1];
	int marginWidth = argList [3];
	int marginHeight = argList [5];
	int borderWidth = getBorderWidth ();
	trimX = x - marginWidth - thickness - borderWidth;
	trimY = y - marginHeight - thickness - borderWidth;
	trimWidth = width + ((marginWidth + thickness + borderWidth) * 2);
	trimHeight = height + ((marginHeight + thickness + borderWidth) * 2);
	if (OS.XtIsManaged (labelHandle)) {
	int [] argList2 = {OS.XmNy, 0, OS.XmNheight, 0};
	OS.XtGetValues (labelHandle, argList2, argList2.length / 2);
	int titleHeight = ((short) argList2 [1]) + argList2 [3];
	trimY = y - titleHeight;
	trimHeight = height + titleHeight + (marginHeight + thickness + borderWidth);
	}
	return new Rectangle (trimX, trimY, trimWidth, trimHeight);
	}
	void createHandle (int index) {
	state \|= THEME_BACKGROUND;
	/*
	* Feature in Motif. When a widget is managed or unmanaged,
	* it may request and be granted, a new size in the OS. This
	* behavior is unwanted. The fix is to create a parent for
	* the list that will disallow geometry requests.
	*/
	int border = (style & SWT.BORDER) != 0 ? 1 : 0;
	int [] argList1 = {
	OS.XmNancestorSensitive, 1,
	OS.XmNborderWidth, border,
	};
	int parentHandle = parent.handle;
	formHandle = OS.XmCreateForm (parentHandle, null, argList1, argList1.length / 2);
	if (formHandle == 0) error (SWT.ERROR_NO_HANDLES);
	int [] argList2 = {
	OS.XmNshadowType, shadowType (),
	OS.XmNtopAttachment, OS.XmATTACH_FORM,
	OS.XmNbottomAttachment, OS.XmATTACH_FORM,
	OS.XmNleftAttachment, OS.XmATTACH_FORM,
	OS.XmNrightAttachment, OS.XmATTACH_FORM,
	OS.XmNresizable, 0,
	};
	handle = OS.XmCreateFrame (formHandle, null, argList2, argList2.length / 2);
	if (handle == 0) error (SWT.ERROR_NO_HANDLES);
	int [] argList3 = {OS.XmNframeChildType, OS.XmFRAME_TITLE_CHILD};
	labelHandle = OS.XmCreateLabel (handle, null, argList3, argList3.length / 2);
	if (labelHandle == 0) error (SWT.ERROR_NO_HANDLES);
	int [] argList4 = {OS.XmNforeground, 0, OS.XmNbackground, 0};
	OS.XtGetValues (handle, argList4, argList4.length / 2);
	OS.XtSetValues (labelHandle, argList4, argList4.length / 2);
	}
	void deregister () {
	super.deregister ();
	display.removeWidget (labelHandle);
	}
	void enableWidget (boolean enabled) {
	super.enableWidget (enabled);
	enableHandle (enabled, labelHandle);
	}
	int fontHandle () {
	return labelHandle;
	}
	public Rectangle getClientArea () {
	checkWidget();
	/*
	* Bug in Motif. For some reason, if a form has not been realized,
	* calling XtResizeWidget () on the form does not lay out properly.
	* The fix is to force the widget to be realized by forcing the shell
	* to be realized.
	*/
	if (!OS.XtIsRealized (handle)) getShell ().realizeWidget ();
	int [] argList = {
	OS.XmNwidth, 0,
	OS.XmNheight, 0,
	OS.XmNshadowThickness, 0,
	OS.XmNmarginWidth, 0,
	OS.XmNmarginHeight, 0
	};
	OS.XtGetValues (handle, argList, argList.length / 2);
	int thickness = argList [5];
	int marginWidth = argList [7];
	int marginHeight = argList [9];
	int borderWidth = getBorderWidth ();
	int x = marginWidth + thickness + borderWidth;
	int y = marginHeight + thickness + borderWidth;
	int width = argList [1] - ((marginWidth + thickness + borderWidth) * 2);
	int height = argList [3] - ((marginHeight + thickness + borderWidth) * 2);
	if (OS.XtIsManaged (labelHandle)) {
	int [] argList2 = {OS.XmNy, 0, OS.XmNheight, 0};
	OS.XtGetValues (labelHandle, argList2, argList2.length / 2);
	y = ((short) argList2 [1]) + argList2 [3];
	height = argList [3] - y - (marginHeight + thickness + borderWidth);
	}
	return new Rectangle (x, y, width, height);
	}
	/**
	* Returns the receiver's text, which is the string that the
	* is used as the <em>title</em>. If the text has not previously
	* been set, returns an empty string.
	*
	* @return the text
	*
	* @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 String getText () {
	checkWidget();
	return text;
	}
	void hookEvents () {
	super.hookEvents ();
	int windowProc = display.windowProc;
	OS.XtAddEventHandler (labelHandle, OS.ButtonPressMask, false, windowProc, BUTTON_PRESS);
	OS.XtAddEventHandler (labelHandle, OS.ButtonReleaseMask, false, windowProc, BUTTON_RELEASE);
	OS.XtAddEventHandler (labelHandle, OS.PointerMotionMask, false, windowProc, POINTER_MOTION);
	}
	boolean mnemonicHit (char key) {
	return setFocus ();
	}
	boolean mnemonicMatch (char key) {
	char mnemonic = findMnemonic (getText ());
	if (mnemonic == '\0') return false;
	return Character.toUpperCase (key) == Character.toUpperCase (mnemonic);
	}
	void propagateWidget (boolean enabled) {
	super.propagateWidget (enabled);
	propagateHandle (enabled, labelHandle, OS.None);
	}
	void redrawWidget (int x, int y, int width, int height, boolean redrawAll, boolean allChildren, boolean trim) {
	super.redrawWidget (x, y, width, height, redrawAll, allChildren, trim);
	short [] root_x = new short [1], root_y = new short [1];
	OS.XtTranslateCoords (handle, (short) x, (short) y, root_x, root_y);
	short [] label_x = new short [1], label_y = new short [1];
	OS.XtTranslateCoords (labelHandle, (short) 0, (short) 0, label_x, label_y);
	redrawHandle (root_x [0] - label_x [0], root_y [0] - label_y [0], width, height, redrawAll, labelHandle);
	}
	void register () {
	super.register ();
	display.addWidget (labelHandle, this);
	}
	void releaseHandle () {
	super.releaseHandle ();
	labelHandle = 0;
	}
	void setBackgroundPixel (int pixel) {
	super.setBackgroundPixel (pixel);
	int [] argList = {OS.XmNforeground, 0};
	OS.XtGetValues (labelHandle, argList, argList.length / 2);
	OS.XmChangeColor (labelHandle, pixel);
	OS.XtSetValues (labelHandle, argList, argList.length / 2);
	}
	void setForegroundPixel (int pixel) {
	int [] argList = {OS.XmNforeground, pixel};
	OS.XtSetValues (labelHandle, argList, argList.length / 2);
	super.setForegroundPixel (pixel);
	}
	void setParentBackground () {
	super.setParentBackground ();
	if (labelHandle != 0) setParentBackground (labelHandle);
	}
	/**
	* Sets the receiver's text, which is the string that will
	* be displayed as the receiver's <em>title</em>, to the argument,
	* which may not be null. The string may include the mnemonic character.
	* </p>
	* Mnemonics are indicated by an '&' that causes the next
	* character to be the mnemonic. When the user presses a
	* key sequence that matches the mnemonic, focus is assigned
	* to the first child of the group. On most platforms, the
	* mnemonic appears underlined but may be emphasised in a
	* platform specific manner. The mnemonic indicator character
	* '&' can be escaped by doubling it in the string, causing
	* a single '&' to be displayed.
	* </p>
	* @param string the new text
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if the text 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 void setText (String string) {
	checkWidget();
	if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
	text = string;
	char [] text = new char [string.length ()];
	string.getChars (0, text.length, text, 0);
	int mnemonic = fixMnemonic (text);
	byte [] buffer = Converter.wcsToMbcs (getCodePage (), text, true);
	int xmString = OS.XmStringParseText (
	buffer,
	0,
	OS.XmFONTLIST_DEFAULT_TAG,
	OS.XmCHARSET_TEXT,
	null,
	0,
	0);
	if (xmString == 0) error (SWT.ERROR_CANNOT_SET_TEXT);
	if (mnemonic == 0) mnemonic = OS.XK_VoidSymbol;
	int [] argList = {
	OS.XmNlabelType, OS.XmSTRING,
	OS.XmNlabelString, xmString,
	OS.XmNmnemonic, mnemonic,
	};
	OS.XtSetValues (labelHandle, argList, argList.length / 2);
	if (xmString != 0) OS.XmStringFree (xmString);
	if (string.length () == 0) {
	OS.XtUnmanageChild (labelHandle);
	} else {
	OS.XtManageChild (labelHandle);
	}
	}
	int shadowType () {
	if ((style & SWT.SHADOW_IN) != 0) return OS.XmSHADOW_IN;
	if ((style & SWT.SHADOW_OUT) != 0) return OS.XmSHADOW_OUT;
	if ((style & SWT.SHADOW_ETCHED_IN) != 0) return OS.XmSHADOW_ETCHED_IN;
	if ((style & SWT.SHADOW_ETCHED_OUT) != 0) return OS.XmSHADOW_ETCHED_OUT;
	return OS.XmSHADOW_ETCHED_IN;
	}
	}