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

 /*******************************************************************************
  * Copyright (c) 2000, 2008 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.swt.widgets;


 import org.eclipse.swt.internal.carbon.ControlFontStyleRec;
 import org.eclipse.swt.internal.carbon.OS;

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

 /**
  * Instances of this class represent a non-selectable
  * user interface object that displays a string or image.
  * When SEPARATOR is specified, displays a single
  * vertical or horizontal line.
  * <p>
  * Shadow styles are hints and may not be honored
  * by the platform.  To create a separator label
  * with the default shadow style for the platform,
  * do not specify a shadow style.
  * </p>
  * <dl>
  * <dt><b>Styles:</b></dt>
  * <dd>SEPARATOR, HORIZONTAL, VERTICAL</dd>
  * <dd>SHADOW_IN, SHADOW_OUT, SHADOW_NONE</dd>
  * <dd>CENTER, LEFT, RIGHT, WRAP</dd>
  * <dt><b>Events:</b></dt>
  * <dd>(none)</dd>
  * </dl>
  * <p>
  * Note: Only one of SHADOW_IN, SHADOW_OUT and SHADOW_NONE may be specified.
  * SHADOW_NONE is a HINT. Only one of HORIZONTAL and VERTICAL may be specified.
  * Only one of CENTER, LEFT and RIGHT may be specified.
  * </p><p>
  * IMPORTANT: This class is intended to be subclassed <em>only</em>
  * within the SWT implementation.
  * </p>
  *
  * @see <a href="http://www.eclipse.org/swt/snippets/#label">Label snippets</a>
  * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample</a>
  * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
  * @noextend This class is not intended to be subclassed by clients.
  */
 public class Label extends Control {
 	String text = "";
 	Image image;
 	boolean isImage;

 /**
  * 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#SEPARATOR
  * @see SWT#HORIZONTAL
  * @see SWT#VERTICAL
  * @see SWT#SHADOW_IN
  * @see SWT#SHADOW_OUT
  * @see SWT#SHADOW_NONE
  * @see SWT#CENTER
  * @see SWT#LEFT
  * @see SWT#RIGHT
  * @see SWT#WRAP
  * @see Widget#checkSubclass
  * @see Widget#getStyle
  */
 public Label (Composite parent, int style) {
 	super (parent, checkStyle (style));
 }

 void addRelation (Control control) {
 	if (!control.isDescribedByLabel ()) return;

 	int labelElement = OS.AXUIElementCreateWithHIObjectAndIdentifier (handle, 0);
 	String string = OS.kAXTitleUIElementAttribute;  // control LabeledBy this
 	char [] buffer = new char [string.length ()];
 	string.getChars (0, buffer.length, buffer, 0);
 	int stringRef = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, buffer.length);
 	OS.HIObjectSetAuxiliaryAccessibilityAttribute(control.focusHandle (), 0, stringRef, labelElement);
 	OS.CFRelease(labelElement);
 	OS.CFRelease(stringRef);

 	int relatedElement = OS.AXUIElementCreateWithHIObjectAndIdentifier (control.focusHandle (), 0);
 	int array = OS.CFArrayCreateMutable(OS.kCFAllocatorDefault, 1, 0);
 	OS.CFArrayAppendValue(array, relatedElement);
 	string = OS.kAXServesAsTitleForUIElementsAttribute;  // this LabelFor control
 	buffer = new char [string.length ()];
 	string.getChars (0, buffer.length, buffer, 0);
 	stringRef = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, buffer.length);
 	OS.HIObjectSetAuxiliaryAccessibilityAttribute(handle, 0, stringRef, array);
 	OS.CFRelease(relatedElement);
 	OS.CFRelease(stringRef);
 	OS.CFRelease(array);
 }

 static int checkStyle (int style) {
 	style |= SWT.NO_FOCUS;
 	if ((style & SWT.SEPARATOR) != 0) {
 		style = checkBits (style, SWT.VERTICAL, SWT.HORIZONTAL, 0, 0, 0, 0);
 		return checkBits (style, SWT.SHADOW_OUT, SWT.SHADOW_IN, SWT.SHADOW_NONE, 0, 0, 0);
 	}
 	return checkBits (style, SWT.LEFT, SWT.CENTER, SWT.RIGHT, 0, 0, 0);
 }

 public Point computeSize (int wHint, int hHint, boolean changed) {
 	checkWidget();
 	int width = 0, height = 0;
 	if ((style & SWT.SEPARATOR) != 0) {
 		if ((style & SWT.HORIZONTAL) != 0) {
 			width = DEFAULT_WIDTH;
 			height = 3;
 		} else {
 			width = 3;
 			height = DEFAULT_HEIGHT;
 		}
 	} else {
 		if (isImage && image != null) {
 			Rectangle r = image.getBounds ();
 			width = r.width;
 			height = r.height;
 		} else {
 			int [] ptr = new int [1];
 			OS.GetControlData (handle, (short) 0 , OS.kControlStaticTextCFStringTag, 4, ptr, null);
 			Point size = textExtent (ptr [0], (style & SWT.WRAP) != 0 && wHint != SWT.DEFAULT ? wHint : 0);
 			if (ptr [0] != 0) OS.CFRelease (ptr [0]);
 			width = size.x;
 			height = size.y;
 		}
 	}
 	if (wHint != SWT.DEFAULT) width = wHint;
 	if (hHint != SWT.DEFAULT) height = hHint;
 	return new Point (width, height);
 }

 void createHandle () {
 	state |= GRAB | THEME_BACKGROUND;
 	int [] outControl = new int [1];
 	int window = OS.GetControlOwner (parent.handle);
 	if ((style & SWT.SEPARATOR) != 0) {
 		OS.CreateSeparatorControl (window, null, outControl);
 	} else {
 		int just = OS.teFlushLeft;
 		if ((style & SWT.CENTER) != 0) just = OS.teCenter;
 		if ((style & SWT.RIGHT) != 0) just = OS.teFlushRight;
 		ControlFontStyleRec fontStyle = new ControlFontStyleRec ();
 		fontStyle.flags |= OS.kControlUseJustMask;
 		fontStyle.just = (short) just;
 		OS.CreateStaticTextControl (window, null, 0, fontStyle, outControl);
 	}
 	if (outControl [0] == 0) error (SWT.ERROR_NO_HANDLES);
 	handle = outControl [0];
 	if ((style & SWT.WRAP) == 0) {
 		OS.SetControlData (handle, OS.kControlEntireControl, OS.kControlStaticTextIsMultilineTag, 1, new byte[] {0});
 	}
 }

 int defaultThemeFont () {
 	if (display.smallFonts) return OS.kThemeSmallSystemFont;
 	return OS.kThemePushButtonFont;
 }

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

 void drawWidget (int control, int context, int damageRgn, int visibleRgn, int theEvent) {
 	if (isImage && image != null) {
 		GCData data = new GCData ();
 		data.paintEvent = theEvent;
 		data.visibleRgn = visibleRgn;
 		GC gc = GC.carbon_new (this, data);
 		int x = 0;
 		Point size = getSize ();
 		Rectangle bounds = image.getBounds ();
 		if ((style & SWT.CENTER) != 0) x = (size.x - bounds.width) / 2;
 		if ((style & SWT.RIGHT) != 0) x = size.x - bounds.width;
 		gc.drawImage (image, x, 0);
 		gc.dispose ();
 	}
 	super.drawWidget (control, context, damageRgn, visibleRgn, theEvent);
 }

 /**
  * Returns a value which describes the position of the
  * text or image in the receiver. The value will be one of
  * <code>LEFT</code>, <code>RIGHT</code> or <code>CENTER</code>
  * unless the receiver is a <code>SEPARATOR</code> label, in
  * which case, <code>NONE</code> is returned.
  *
  * @return the alignment
  *
  * @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 getAlignment () {
 	checkWidget();
 	if ((style & SWT.SEPARATOR) != 0) return SWT.LEFT;
 	if ((style & SWT.CENTER) != 0) return SWT.CENTER;
 	if ((style & SWT.RIGHT) != 0) return SWT.RIGHT;
 	return SWT.LEFT;
 }

 /**
  * Returns the receiver's image if it has one, or null
  * if it does not.
  *
  * @return the receiver's image
  *
  * @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 Image getImage () {
 	checkWidget();
 	return image;
 }

 String getNameText () {
 	return getText ();
 }

 /**
  * Returns the receiver's text, which will be an empty
  * string if it has never been set or if the receiver is
  * a <code>SEPARATOR</code> label.
  *
  * @return the receiver's 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();
 	if ((style & SWT.SEPARATOR) != 0) return "";
 	return text;
 }

 boolean isDescribedByLabel () {
 	return false;
 }

 /*
  * Remove "Label for" relations from the receiver.
  */
 void removeRelation () {
 	String string = OS.kAXServesAsTitleForUIElementsAttribute;
 	char [] buffer = new char [string.length ()];
 	string.getChars (0, buffer.length, buffer, 0);
 	int stringRef = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, buffer.length);
 	OS.HIObjectSetAuxiliaryAccessibilityAttribute(handle, 0, stringRef, 0);
 	OS.CFRelease(stringRef);
 }

 /**
  * Controls how text and images will be displayed in the receiver.
  * The argument should be one of <code>LEFT</code>, <code>RIGHT</code>
  * or <code>CENTER</code>.  If the receiver is a <code>SEPARATOR</code>
  * label, the argument is ignored and the alignment is not changed.
  *
  * @param alignment the new alignment
  *
  * @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 setAlignment (int alignment) {
 	checkWidget();
 	if ((style & SWT.SEPARATOR) != 0) return;
 	if ((alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER)) == 0) return;
 	style &= ~(SWT.LEFT | SWT.RIGHT | SWT.CENTER);
 	style |= alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER);
 	int just = OS.teFlushLeft;
 	if ((alignment & SWT.CENTER) != 0) just = OS.teCenter;
 	if ((alignment & SWT.RIGHT) != 0) just = OS.teFlushRight;
 	ControlFontStyleRec fontStyle = new ControlFontStyleRec ();
 	OS.GetControlData (handle, (short) OS.kControlEntireControl, OS.kControlFontStyleTag, ControlFontStyleRec.sizeof, fontStyle, null);
 	fontStyle.flags |= OS.kControlUseJustMask;
 	fontStyle.just = (short) just;
 	OS.SetControlFontStyle (handle, fontStyle);
 	redraw ();
 }

 /**
  * Sets the receiver's image to the argument, which may be
  * null indicating that no image should be displayed.
  *
  * @param image the image to display on the receiver (may be null)
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
  * </ul>
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  * </ul>
  */
 public void setImage (Image image) {
 	checkWidget();
 	if ((style & SWT.SEPARATOR) != 0) return;
 	if (image != null && image.isDisposed ()) {
 		error (SWT.ERROR_INVALID_ARGUMENT);
 	}
 	this.image = image;
 	isImage = true;
 	if (image == null) {
 		setText (text);
 		return;
 	}
 	if (text.length () > 0) {
 		int ptr = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, null, 0);
 		if (ptr == 0) error (SWT.ERROR_CANNOT_SET_TEXT);
 		OS.SetControlData (handle, 0 , OS.kControlStaticTextCFStringTag, 4, new int[]{ptr});
 		OS.CFRelease (ptr);
 	}
 	redraw ();
 }

 /**
  * Sets the receiver's text.
  * <p>
  * This method sets the widget label.  The label may include
  * the mnemonic character and line delimiters.
  * </p>
  * <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 control that follows the label. 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);
 	if ((style & SWT.SEPARATOR) != 0) return;
 	isImage = false;
 	text = string;
 	char [] buffer = new char [text.length ()];
 	text.getChars (0, buffer.length, buffer, 0);
 	int length = fixMnemonic (buffer);
 	int ptr = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, length);
 	if (ptr == 0) error (SWT.ERROR_CANNOT_SET_TEXT);
 	OS.SetControlData (handle, 0 , OS.kControlStaticTextCFStringTag, 4, new int[]{ptr});
 	OS.CFRelease (ptr);
 	redraw ();
 }

 }
	/*******************************************************************************
	* Copyright (c) 2000, 2008 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.swt.widgets;


	import org.eclipse.swt.internal.carbon.ControlFontStyleRec;
	import org.eclipse.swt.internal.carbon.OS;

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

	/**
	* Instances of this class represent a non-selectable
	* user interface object that displays a string or image.
	* When SEPARATOR is specified, displays a single
	* vertical or horizontal line.
	* <p>
	* Shadow styles are hints and may not be honored
	* by the platform. To create a separator label
	* with the default shadow style for the platform,
	* do not specify a shadow style.
	* </p>
	* <dl>
	* <dt><b>Styles:</b></dt>
	* <dd>SEPARATOR, HORIZONTAL, VERTICAL</dd>
	* <dd>SHADOW_IN, SHADOW_OUT, SHADOW_NONE</dd>
	* <dd>CENTER, LEFT, RIGHT, WRAP</dd>
	* <dt><b>Events:</b></dt>
	* <dd>(none)</dd>
	* </dl>
	* <p>
	* Note: Only one of SHADOW_IN, SHADOW_OUT and SHADOW_NONE may be specified.
	* SHADOW_NONE is a HINT. Only one of HORIZONTAL and VERTICAL may be specified.
	* Only one of CENTER, LEFT and RIGHT may be specified.
	* </p><p>
	* IMPORTANT: This class is intended to be subclassed <em>only</em>
	* within the SWT implementation.
	* </p>
	*
	* @see <a href="http://www.eclipse.org/swt/snippets/#label">Label snippets</a>
	* @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample</a>
	* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
	* @noextend This class is not intended to be subclassed by clients.
	*/
	public class Label extends Control {
	String text = "";
	Image image;
	boolean isImage;

	/**
	* 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#SEPARATOR
	* @see SWT#HORIZONTAL
	* @see SWT#VERTICAL
	* @see SWT#SHADOW_IN
	* @see SWT#SHADOW_OUT
	* @see SWT#SHADOW_NONE
	* @see SWT#CENTER
	* @see SWT#LEFT
	* @see SWT#RIGHT
	* @see SWT#WRAP
	* @see Widget#checkSubclass
	* @see Widget#getStyle
	*/
	public Label (Composite parent, int style) {
	super (parent, checkStyle (style));
	}

	void addRelation (Control control) {
	if (!control.isDescribedByLabel ()) return;

	int labelElement = OS.AXUIElementCreateWithHIObjectAndIdentifier (handle, 0);
	String string = OS.kAXTitleUIElementAttribute; // control LabeledBy this
	char [] buffer = new char [string.length ()];
	string.getChars (0, buffer.length, buffer, 0);
	int stringRef = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, buffer.length);
	OS.HIObjectSetAuxiliaryAccessibilityAttribute(control.focusHandle (), 0, stringRef, labelElement);
	OS.CFRelease(labelElement);
	OS.CFRelease(stringRef);

	int relatedElement = OS.AXUIElementCreateWithHIObjectAndIdentifier (control.focusHandle (), 0);
	int array = OS.CFArrayCreateMutable(OS.kCFAllocatorDefault, 1, 0);
	OS.CFArrayAppendValue(array, relatedElement);
	string = OS.kAXServesAsTitleForUIElementsAttribute; // this LabelFor control
	buffer = new char [string.length ()];
	string.getChars (0, buffer.length, buffer, 0);
	stringRef = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, buffer.length);
	OS.HIObjectSetAuxiliaryAccessibilityAttribute(handle, 0, stringRef, array);
	OS.CFRelease(relatedElement);
	OS.CFRelease(stringRef);
	OS.CFRelease(array);
	}

	static int checkStyle (int style) {
	style \|= SWT.NO_FOCUS;
	if ((style & SWT.SEPARATOR) != 0) {
	style = checkBits (style, SWT.VERTICAL, SWT.HORIZONTAL, 0, 0, 0, 0);
	return checkBits (style, SWT.SHADOW_OUT, SWT.SHADOW_IN, SWT.SHADOW_NONE, 0, 0, 0);
	}
	return checkBits (style, SWT.LEFT, SWT.CENTER, SWT.RIGHT, 0, 0, 0);
	}

	public Point computeSize (int wHint, int hHint, boolean changed) {
	checkWidget();
	int width = 0, height = 0;
	if ((style & SWT.SEPARATOR) != 0) {
	if ((style & SWT.HORIZONTAL) != 0) {
	width = DEFAULT_WIDTH;
	height = 3;
	} else {
	width = 3;
	height = DEFAULT_HEIGHT;
	}
	} else {
	if (isImage && image != null) {
	Rectangle r = image.getBounds ();
	width = r.width;
	height = r.height;
	} else {
	int [] ptr = new int [1];
	OS.GetControlData (handle, (short) 0 , OS.kControlStaticTextCFStringTag, 4, ptr, null);
	Point size = textExtent (ptr [0], (style & SWT.WRAP) != 0 && wHint != SWT.DEFAULT ? wHint : 0);
	if (ptr [0] != 0) OS.CFRelease (ptr [0]);
	width = size.x;
	height = size.y;
	}
	}
	if (wHint != SWT.DEFAULT) width = wHint;
	if (hHint != SWT.DEFAULT) height = hHint;
	return new Point (width, height);
	}

	void createHandle () {
	state \|= GRAB \| THEME_BACKGROUND;
	int [] outControl = new int [1];
	int window = OS.GetControlOwner (parent.handle);
	if ((style & SWT.SEPARATOR) != 0) {
	OS.CreateSeparatorControl (window, null, outControl);
	} else {
	int just = OS.teFlushLeft;
	if ((style & SWT.CENTER) != 0) just = OS.teCenter;
	if ((style & SWT.RIGHT) != 0) just = OS.teFlushRight;
	ControlFontStyleRec fontStyle = new ControlFontStyleRec ();
	fontStyle.flags \|= OS.kControlUseJustMask;
	fontStyle.just = (short) just;
	OS.CreateStaticTextControl (window, null, 0, fontStyle, outControl);
	}
	if (outControl [0] == 0) error (SWT.ERROR_NO_HANDLES);
	handle = outControl [0];
	if ((style & SWT.WRAP) == 0) {
	OS.SetControlData (handle, OS.kControlEntireControl, OS.kControlStaticTextIsMultilineTag, 1, new byte[] {0});
	}
	}

	int defaultThemeFont () {
	if (display.smallFonts) return OS.kThemeSmallSystemFont;
	return OS.kThemePushButtonFont;
	}

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

	void drawWidget (int control, int context, int damageRgn, int visibleRgn, int theEvent) {
	if (isImage && image != null) {
	GCData data = new GCData ();
	data.paintEvent = theEvent;
	data.visibleRgn = visibleRgn;
	GC gc = GC.carbon_new (this, data);
	int x = 0;
	Point size = getSize ();
	Rectangle bounds = image.getBounds ();
	if ((style & SWT.CENTER) != 0) x = (size.x - bounds.width) / 2;
	if ((style & SWT.RIGHT) != 0) x = size.x - bounds.width;
	gc.drawImage (image, x, 0);
	gc.dispose ();
	}
	super.drawWidget (control, context, damageRgn, visibleRgn, theEvent);
	}

	/**
	* Returns a value which describes the position of the
	* text or image in the receiver. The value will be one of
	* <code>LEFT</code>, <code>RIGHT</code> or <code>CENTER</code>
	* unless the receiver is a <code>SEPARATOR</code> label, in
	* which case, <code>NONE</code> is returned.
	*
	* @return the alignment
	*
	* @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 getAlignment () {
	checkWidget();
	if ((style & SWT.SEPARATOR) != 0) return SWT.LEFT;
	if ((style & SWT.CENTER) != 0) return SWT.CENTER;
	if ((style & SWT.RIGHT) != 0) return SWT.RIGHT;
	return SWT.LEFT;
	}

	/**
	* Returns the receiver's image if it has one, or null
	* if it does not.
	*
	* @return the receiver's image
	*
	* @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 Image getImage () {
	checkWidget();
	return image;
	}

	String getNameText () {
	return getText ();
	}

	/**
	* Returns the receiver's text, which will be an empty
	* string if it has never been set or if the receiver is
	* a <code>SEPARATOR</code> label.
	*
	* @return the receiver's 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();
	if ((style & SWT.SEPARATOR) != 0) return "";
	return text;
	}

	boolean isDescribedByLabel () {
	return false;
	}

	/*
	* Remove "Label for" relations from the receiver.
	*/
	void removeRelation () {
	String string = OS.kAXServesAsTitleForUIElementsAttribute;
	char [] buffer = new char [string.length ()];
	string.getChars (0, buffer.length, buffer, 0);
	int stringRef = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, buffer.length);
	OS.HIObjectSetAuxiliaryAccessibilityAttribute(handle, 0, stringRef, 0);
	OS.CFRelease(stringRef);
	}

	/**
	* Controls how text and images will be displayed in the receiver.
	* The argument should be one of <code>LEFT</code>, <code>RIGHT</code>
	* or <code>CENTER</code>. If the receiver is a <code>SEPARATOR</code>
	* label, the argument is ignored and the alignment is not changed.
	*
	* @param alignment the new alignment
	*
	* @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 setAlignment (int alignment) {
	checkWidget();
	if ((style & SWT.SEPARATOR) != 0) return;
	if ((alignment & (SWT.LEFT \| SWT.RIGHT \| SWT.CENTER)) == 0) return;
	style &= ~(SWT.LEFT \| SWT.RIGHT \| SWT.CENTER);
	style \|= alignment & (SWT.LEFT \| SWT.RIGHT \| SWT.CENTER);
	int just = OS.teFlushLeft;
	if ((alignment & SWT.CENTER) != 0) just = OS.teCenter;
	if ((alignment & SWT.RIGHT) != 0) just = OS.teFlushRight;
	ControlFontStyleRec fontStyle = new ControlFontStyleRec ();
	OS.GetControlData (handle, (short) OS.kControlEntireControl, OS.kControlFontStyleTag, ControlFontStyleRec.sizeof, fontStyle, null);
	fontStyle.flags \|= OS.kControlUseJustMask;
	fontStyle.just = (short) just;
	OS.SetControlFontStyle (handle, fontStyle);
	redraw ();
	}

	/**
	* Sets the receiver's image to the argument, which may be
	* null indicating that no image should be displayed.
	*
	* @param image the image to display on the receiver (may be null)
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
	* </ul>
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	* </ul>
	*/
	public void setImage (Image image) {
	checkWidget();
	if ((style & SWT.SEPARATOR) != 0) return;
	if (image != null && image.isDisposed ()) {
	error (SWT.ERROR_INVALID_ARGUMENT);
	}
	this.image = image;
	isImage = true;
	if (image == null) {
	setText (text);
	return;
	}
	if (text.length () > 0) {
	int ptr = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, null, 0);
	if (ptr == 0) error (SWT.ERROR_CANNOT_SET_TEXT);
	OS.SetControlData (handle, 0 , OS.kControlStaticTextCFStringTag, 4, new int[]{ptr});
	OS.CFRelease (ptr);
	}
	redraw ();
	}

	/**
	* Sets the receiver's text.
	* <p>
	* This method sets the widget label. The label may include
	* the mnemonic character and line delimiters.
	* </p>
	* <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 control that follows the label. 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);
	if ((style & SWT.SEPARATOR) != 0) return;
	isImage = false;
	text = string;
	char [] buffer = new char [text.length ()];
	text.getChars (0, buffer.length, buffer, 0);
	int length = fixMnemonic (buffer);
	int ptr = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, length);
	if (ptr == 0) error (SWT.ERROR_CANNOT_SET_TEXT);
	OS.SetControlData (handle, 0 , OS.kControlStaticTextCFStringTag, 4, new int[]{ptr});
	OS.CFRelease (ptr);
	redraw ();
	}

	}