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

 package org.eclipse.swt.widgets;

 /*
  * Copyright (c) 2000, 2002 IBM Corp.  All rights reserved.
  * This file is made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/cpl-v10.html
  */

 import org.eclipse.swt.internal.*;
 import org.eclipse.swt.internal.motif.*;

 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.
  * <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>
  */
 public class Label extends Control {
 	String text = "";
 	Image image, bitmap, disabled;

 /**
  * 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));
 }
 static int checkStyle (int style) {
 	if ((style & SWT.SEPARATOR) != 0) return style;
 	return checkBits (style, SWT.LEFT, SWT.CENTER, SWT.RIGHT, 0, 0, 0);
 }
 public Point computeSize (int wHint, int hHint, boolean changed) {
 	checkWidget();
 	int border = getBorderWidth ();
 	int width = border * 2, height = border * 2;
 	if ((style & SWT.SEPARATOR) != 0) {
 		if ((style & SWT.HORIZONTAL) != 0) {
 			width += DEFAULT_WIDTH;  height += 3;
 		} else {
 			width += 3; height += DEFAULT_HEIGHT;
 		}
 		if (wHint != SWT.DEFAULT) width = wHint + (border * 2);
 		if (hHint != SWT.DEFAULT) height = hHint + (border * 2);
 		return new Point (width, height);
 	}
 	int [] argList = {OS.XmNlabelType, 0};
 	OS.XtGetValues (handle, argList, argList.length / 2);
 	int labelType = argList [1];
 	if (labelType == OS.XmSTRING && (style & SWT.WRAP) != 0 && wHint != SWT.DEFAULT) {
 		/* If we are wrapping text, calculate the height based on wHint. */
 		int [] argList4 = {
 			OS.XmNmarginTop, 0,     /* 1 */
 			OS.XmNmarginBottom, 0,  /* 3 */
 			OS.XmNmarginHeight, 0,  /* 5 */
 			OS.XmNmarginWidth, 0,   /* 7 */
 		};
 		OS.XtGetValues (handle, argList4, argList4.length / 2);
 		int unavailable = 2 * (argList4 [7] + getBorderWidth());
 		Display display = getDisplay ();
 		String string = display.wrapText (text, font, wHint - unavailable);
 		GC gc = new GC(this);
 		Point extent = gc.textExtent(string);
 		gc.dispose();
 		height = extent.y + argList4 [1] + argList4 [3] + argList4 [5] * 2 + border * 2;
 	} else {
 		/* If we are not wrapping, ask the widget for its geometry. */
 		XtWidgetGeometry result = new XtWidgetGeometry ();
 		result.request_mode = OS.CWWidth | OS.CWHeight;
 		int [] argList2 = {OS.XmNrecomputeSize, 1};
 		OS.XtSetValues(handle, argList2, argList2.length / 2);
 		OS.XtQueryGeometry (handle, null, result);
 		int [] argList3 = {OS.XmNrecomputeSize, 0};
 		OS.XtSetValues(handle, argList3, argList3.length / 2);
 		width += result.width;
 		height += result.height;
 	}

 	/*
 	 * Feature in Motif. If a label's labelType is XmSTRING but it
 	 * has no label set into it yet, recomputing the size will
 	 * not take into account the height of the font, as we would
 	 * like it to. Take care of this case.
 	 */
 	if (labelType == OS.XmSTRING && text.length () == 0) {
 		height += getFontHeight ();
 		width = 0;
 	}
 	if (wHint != SWT.DEFAULT) width = wHint + (border * 2);
 	if (hHint != SWT.DEFAULT) height = hHint + (border * 2);
 	return new Point (width, height);
 }
 void createHandle (int index) {
 	state |= HANDLE;
 	int parentHandle = parent.handle;
 	int borderWidth = (style & SWT.BORDER) != 0 ? 1 : 0;
 	if ((style & SWT.SEPARATOR) != 0) {
 		int separatorType = separatorType ();
 		int orientation = (style & SWT.HORIZONTAL) != 0 ? OS.XmHORIZONTAL : OS.XmVERTICAL;
 		int [] argList = {
 			OS.XmNancestorSensitive, 1,
 			OS.XmNborderWidth, borderWidth,
 			OS.XmNorientation, orientation,
 			OS.XmNseparatorType, separatorType,
 		};
 		handle = OS.XmCreateSeparator (parentHandle, null, argList, argList.length / 2);
 		if (handle == 0) error (SWT.ERROR_NO_HANDLES);
 		return;
 	}
 	int alignment = OS.XmALIGNMENT_BEGINNING;
 	if ((style & SWT.CENTER) != 0) alignment = OS.XmALIGNMENT_CENTER;
 	if ((style & SWT.RIGHT) != 0) alignment = OS.XmALIGNMENT_END;
 	int [] argList = {
 		OS.XmNancestorSensitive, 1,
 		OS.XmNrecomputeSize, 0,
 		OS.XmNalignment, alignment,
 		OS.XmNborderWidth, borderWidth,
 	};
 	handle = OS.XmCreateLabel (parentHandle, null, argList, argList.length / 2);
 	if (handle == 0) error (SWT.ERROR_NO_HANDLES);
 }
 int defaultBackground () {
 	return getDisplay ().labelBackground;
 }
 Font defaultFont () {
 	return getDisplay ().labelFont;
 }
 int defaultForeground () {
 	return getDisplay ().labelForeground;
 }
 /**
  * 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;
 	int [] argList = {OS.XmNalignment, 0};
 	OS.XtGetValues (handle, argList, argList.length / 2);
 	int alignment = argList [1];
 	if (alignment == OS.XmALIGNMENT_BEGINNING) return SWT.LEFT;
 	if (alignment == OS.XmALIGNMENT_CENTER) return SWT.CENTER;
 	if (alignment == OS.XmALIGNMENT_END)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 mnemonicHit (char key) {
 	Composite control = this.parent;
 	while (control != null) {
 		Control [] children = control._getChildren ();
 		int index = 0;
 		while (index < children.length) {
 			if (children [index] == this) break;
 			index++;
 		}
 		index++;
 		if (index < children.length) {
 			if (children [index].setFocus ()) return true;
 		}
 		control = control.parent;
 	}
 	return false;
 }
 boolean mnemonicMatch (char key) {
 	char mnemonic = findMnemonic (getText ());
 	if (mnemonic == '\0') return false;
 	return Character.toUpperCase (key) == Character.toUpperCase (mnemonic);
 }
 void releaseWidget () {
 	super.releaseWidget ();
 	int [] argList = {
 		OS.XmNlabelPixmap, OS.XmUNSPECIFIED_PIXMAP,
 		OS.XmNlabelInsensitivePixmap, OS.XmUNSPECIFIED_PIXMAP,
 	};
 	OS.XtSetValues (handle, argList, argList.length / 2);
 	if (bitmap != null) bitmap.dispose ();
 	if (disabled != null) disabled.dispose ();
 	image = bitmap = disabled = null;
 }
 int separatorType () {
 	if ((style & (SWT.SHADOW_IN)) != 0) return OS.XmSHADOW_ETCHED_IN;
 	if ((style & (SWT.SHADOW_OUT)) != 0) return OS.XmSHADOW_ETCHED_OUT;
 	return OS.XmSHADOW_ETCHED_IN;
 }
 /**
  * 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;
 	int [] argList = {OS.XmNalignment, OS.XmALIGNMENT_BEGINNING};
 	if ((alignment & SWT.CENTER) != 0) argList [1] = OS.XmALIGNMENT_CENTER;
 	if ((alignment & SWT.RIGHT) != 0) argList [1] = OS.XmALIGNMENT_END;
 	OS.XtSetValues (handle, argList, argList.length / 2);
 }
 void setBackgroundPixel (int pixel) {
 	super.setBackgroundPixel (pixel);
 	int [] argList = {OS.XmNlabelType, 0};
 	OS.XtGetValues (handle, argList, argList.length / 2);
 	if (argList [1] == OS.XmPIXMAP) setBitmap (image);
 }
 void setBitmap (Image image) {
 	int labelPixmap = OS.XmUNSPECIFIED_PIXMAP;
 	int labelInsensitivePixmap = OS.XmUNSPECIFIED_PIXMAP;
 	if (bitmap != null) bitmap.dispose ();
 	if (disabled != null) disabled.dispose ();
 	bitmap = disabled = null;
 	if (image != null) {
 		if (image.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT);
 		Display display = getDisplay ();
 		switch (image.type) {
 			case SWT.BITMAP:
 				labelPixmap = image.pixmap;
 				disabled = new Image (display, image, SWT.IMAGE_DISABLE);
 				labelInsensitivePixmap = disabled.pixmap;
 				break;
 			case SWT.ICON:
 				Rectangle rect = image.getBounds ();
 				bitmap = new Image (display, rect.width, rect.height);
 				GC gc = new GC (bitmap);
 				gc.setBackground (getBackground ());
 				gc.fillRectangle (rect);
 				gc.drawImage (image, 0, 0);
 				gc.dispose ();
 				labelPixmap = bitmap.pixmap;
 				disabled = new Image (display, bitmap, SWT.IMAGE_DISABLE);
 				labelInsensitivePixmap = disabled.pixmap;
 				break;
 			default:
 				error (SWT.ERROR_NOT_IMPLEMENTED);
 		}
 	}
 	int [] argList = {
 		OS.XmNlabelType, OS.XmPIXMAP,
 		OS.XmNlabelPixmap, labelPixmap,
 		OS.XmNlabelInsensitivePixmap, labelInsensitivePixmap,
 	};
 	OS.XtSetValues (handle, argList, argList.length / 2);
 }
 boolean setBounds (int x, int y, int width, int height, boolean move, boolean resize) {
 	boolean changed = super.setBounds (x, y, width, height, move, resize);
 	if (changed && resize && (style & SWT.WRAP) != 0) setText (text);
 	return changed;
 }
 public void setFont (Font font) {
 	super.setFont (font);
 	if ((style & SWT.WRAP) != 0) setText (text);
 }
 /**
  * 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();
 	setBitmap (this.image = image);
 }
 /**
  * Sets the receiver's text.
  * <p>
  * This method sets the widget label.  The label may include
  * the mnemonic characters and line delimiters.
  * </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;
 	text = string;

 	/* Strip out mnemonic marker symbols, and remember the mnemonic. */
 	char [] unicode = new char [string.length ()];
 	string.getChars (0, unicode.length, unicode, 0);
 	int i=0, j=0, mnemonic=0;
 	while (i < unicode.length) {
 		if ((unicode [j++] = unicode [i++]) == Mnemonic) {
 			if (i == unicode.length) {continue;}
 			if (unicode [i] == Mnemonic) {i++; continue;}
 			if (mnemonic == 0) mnemonic = unicode [i];
 			j--;
 		}
 	}
 	while (j < unicode.length) unicode [j++] = 0;

 	/* Wrap the text if necessary, and convert to mbcs. */
 	byte [] buffer;
 	if ((style & SWT.WRAP) != 0) {
 		int [] argList = {
 			OS.XmNwidth, 0,        /* 1 */
 			OS.XmNmarginLeft, 0,   /* 3 */
 			OS.XmNmarginRight, 0,  /* 5 */
 			OS.XmNborderWidth, 0,  /* 7 */
 			OS.XmNmarginWidth, 0,  /* 9 */
 		};
 		OS.XtGetValues (handle, argList, argList.length / 2);
 		int width = argList [1] - argList [3] - argList [5] - argList [7] * 2 - argList [9] * 2;
 		Display display = getDisplay ();
 		if (mnemonic != 0) string = new String (unicode);
 		string = display.wrapText (string, font, width);
 		buffer = Converter.wcsToMbcs (getCodePage (), string, true);
 	} else {
 		buffer = Converter.wcsToMbcs (getCodePage (), unicode, true);
 	}

 	int xmString = OS.XmStringGenerate(buffer, null, OS.XmCHARSET_TEXT, null);
 	if (xmString == 0) error (SWT.ERROR_CANNOT_SET_TEXT);

 	/*
 	* Bug in Solaris.  If a mnemonic is defined to be a character
 	* that appears in a string in a position that follows a '\n',
 	* Solaris segment faults.  For example, a label with text
 	* "Hello\nthe&re" would GP since "r" appears after '\n'.
 	*
 	* The fix is to remove mnemonics from labels that contain
 	* '\n', which is fine since such labels generally just act
 	* as descriptive texts anyways.
 	*/
 	if (mnemonic == 0 || string.indexOf ('\n') != -1) {
 		mnemonic = OS.XK_VoidSymbol;
 	}
 	int [] argList = {
 		OS.XmNlabelType, OS.XmSTRING,
 		OS.XmNlabelString, xmString,
 		OS.XmNmnemonic, mnemonic,
 	};
 	OS.XtSetValues (handle, argList, argList.length / 2);
 	if (xmString != 0) OS.XmStringFree (xmString);
 }
 }
	package org.eclipse.swt.widgets;

	/*
	* Copyright (c) 2000, 2002 IBM Corp. All rights reserved.
	* This file is made available under the terms of the Common Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/cpl-v10.html
	*/

	import org.eclipse.swt.internal.*;
	import org.eclipse.swt.internal.motif.*;

	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.
	* <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>
	*/
	public class Label extends Control {
	String text = "";
	Image image, bitmap, disabled;

	/**
	* 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));
	}
	static int checkStyle (int style) {
	if ((style & SWT.SEPARATOR) != 0) return style;
	return checkBits (style, SWT.LEFT, SWT.CENTER, SWT.RIGHT, 0, 0, 0);
	}
	public Point computeSize (int wHint, int hHint, boolean changed) {
	checkWidget();
	int border = getBorderWidth ();
	int width = border * 2, height = border * 2;
	if ((style & SWT.SEPARATOR) != 0) {
	if ((style & SWT.HORIZONTAL) != 0) {
	width += DEFAULT_WIDTH; height += 3;
	} else {
	width += 3; height += DEFAULT_HEIGHT;
	}
	if (wHint != SWT.DEFAULT) width = wHint + (border * 2);
	if (hHint != SWT.DEFAULT) height = hHint + (border * 2);
	return new Point (width, height);
	}
	int [] argList = {OS.XmNlabelType, 0};
	OS.XtGetValues (handle, argList, argList.length / 2);
	int labelType = argList [1];
	if (labelType == OS.XmSTRING && (style & SWT.WRAP) != 0 && wHint != SWT.DEFAULT) {
	/* If we are wrapping text, calculate the height based on wHint. */
	int [] argList4 = {
	OS.XmNmarginTop, 0, /* 1 */
	OS.XmNmarginBottom, 0, /* 3 */
	OS.XmNmarginHeight, 0, /* 5 */
	OS.XmNmarginWidth, 0, /* 7 */
	};
	OS.XtGetValues (handle, argList4, argList4.length / 2);
	int unavailable = 2 * (argList4 [7] + getBorderWidth());
	Display display = getDisplay ();
	String string = display.wrapText (text, font, wHint - unavailable);
	GC gc = new GC(this);
	Point extent = gc.textExtent(string);
	gc.dispose();
	height = extent.y + argList4 [1] + argList4 [3] + argList4 [5] * 2 + border * 2;
	} else {
	/* If we are not wrapping, ask the widget for its geometry. */
	XtWidgetGeometry result = new XtWidgetGeometry ();
	result.request_mode = OS.CWWidth \| OS.CWHeight;
	int [] argList2 = {OS.XmNrecomputeSize, 1};
	OS.XtSetValues(handle, argList2, argList2.length / 2);
	OS.XtQueryGeometry (handle, null, result);
	int [] argList3 = {OS.XmNrecomputeSize, 0};
	OS.XtSetValues(handle, argList3, argList3.length / 2);
	width += result.width;
	height += result.height;
	}

	/*
	* Feature in Motif. If a label's labelType is XmSTRING but it
	* has no label set into it yet, recomputing the size will
	* not take into account the height of the font, as we would
	* like it to. Take care of this case.
	*/
	if (labelType == OS.XmSTRING && text.length () == 0) {
	height += getFontHeight ();
	width = 0;
	}
	if (wHint != SWT.DEFAULT) width = wHint + (border * 2);
	if (hHint != SWT.DEFAULT) height = hHint + (border * 2);
	return new Point (width, height);
	}
	void createHandle (int index) {
	state \|= HANDLE;
	int parentHandle = parent.handle;
	int borderWidth = (style & SWT.BORDER) != 0 ? 1 : 0;
	if ((style & SWT.SEPARATOR) != 0) {
	int separatorType = separatorType ();
	int orientation = (style & SWT.HORIZONTAL) != 0 ? OS.XmHORIZONTAL : OS.XmVERTICAL;
	int [] argList = {
	OS.XmNancestorSensitive, 1,
	OS.XmNborderWidth, borderWidth,
	OS.XmNorientation, orientation,
	OS.XmNseparatorType, separatorType,
	};
	handle = OS.XmCreateSeparator (parentHandle, null, argList, argList.length / 2);
	if (handle == 0) error (SWT.ERROR_NO_HANDLES);
	return;
	}
	int alignment = OS.XmALIGNMENT_BEGINNING;
	if ((style & SWT.CENTER) != 0) alignment = OS.XmALIGNMENT_CENTER;
	if ((style & SWT.RIGHT) != 0) alignment = OS.XmALIGNMENT_END;
	int [] argList = {
	OS.XmNancestorSensitive, 1,
	OS.XmNrecomputeSize, 0,
	OS.XmNalignment, alignment,
	OS.XmNborderWidth, borderWidth,
	};
	handle = OS.XmCreateLabel (parentHandle, null, argList, argList.length / 2);
	if (handle == 0) error (SWT.ERROR_NO_HANDLES);
	}
	int defaultBackground () {
	return getDisplay ().labelBackground;
	}
	Font defaultFont () {
	return getDisplay ().labelFont;
	}
	int defaultForeground () {
	return getDisplay ().labelForeground;
	}
	/**
	* 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;
	int [] argList = {OS.XmNalignment, 0};
	OS.XtGetValues (handle, argList, argList.length / 2);
	int alignment = argList [1];
	if (alignment == OS.XmALIGNMENT_BEGINNING) return SWT.LEFT;
	if (alignment == OS.XmALIGNMENT_CENTER) return SWT.CENTER;
	if (alignment == OS.XmALIGNMENT_END)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 mnemonicHit (char key) {
	Composite control = this.parent;
	while (control != null) {
	Control [] children = control._getChildren ();
	int index = 0;
	while (index < children.length) {
	if (children [index] == this) break;
	index++;
	}
	index++;
	if (index < children.length) {
	if (children [index].setFocus ()) return true;
	}
	control = control.parent;
	}
	return false;
	}
	boolean mnemonicMatch (char key) {
	char mnemonic = findMnemonic (getText ());
	if (mnemonic == '\0') return false;
	return Character.toUpperCase (key) == Character.toUpperCase (mnemonic);
	}
	void releaseWidget () {
	super.releaseWidget ();
	int [] argList = {
	OS.XmNlabelPixmap, OS.XmUNSPECIFIED_PIXMAP,
	OS.XmNlabelInsensitivePixmap, OS.XmUNSPECIFIED_PIXMAP,
	};
	OS.XtSetValues (handle, argList, argList.length / 2);
	if (bitmap != null) bitmap.dispose ();
	if (disabled != null) disabled.dispose ();
	image = bitmap = disabled = null;
	}
	int separatorType () {
	if ((style & (SWT.SHADOW_IN)) != 0) return OS.XmSHADOW_ETCHED_IN;
	if ((style & (SWT.SHADOW_OUT)) != 0) return OS.XmSHADOW_ETCHED_OUT;
	return OS.XmSHADOW_ETCHED_IN;
	}
	/**
	* 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;
	int [] argList = {OS.XmNalignment, OS.XmALIGNMENT_BEGINNING};
	if ((alignment & SWT.CENTER) != 0) argList [1] = OS.XmALIGNMENT_CENTER;
	if ((alignment & SWT.RIGHT) != 0) argList [1] = OS.XmALIGNMENT_END;
	OS.XtSetValues (handle, argList, argList.length / 2);
	}
	void setBackgroundPixel (int pixel) {
	super.setBackgroundPixel (pixel);
	int [] argList = {OS.XmNlabelType, 0};
	OS.XtGetValues (handle, argList, argList.length / 2);
	if (argList [1] == OS.XmPIXMAP) setBitmap (image);
	}
	void setBitmap (Image image) {
	int labelPixmap = OS.XmUNSPECIFIED_PIXMAP;
	int labelInsensitivePixmap = OS.XmUNSPECIFIED_PIXMAP;
	if (bitmap != null) bitmap.dispose ();
	if (disabled != null) disabled.dispose ();
	bitmap = disabled = null;
	if (image != null) {
	if (image.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT);
	Display display = getDisplay ();
	switch (image.type) {
	case SWT.BITMAP:
	labelPixmap = image.pixmap;
	disabled = new Image (display, image, SWT.IMAGE_DISABLE);
	labelInsensitivePixmap = disabled.pixmap;
	break;
	case SWT.ICON:
	Rectangle rect = image.getBounds ();
	bitmap = new Image (display, rect.width, rect.height);
	GC gc = new GC (bitmap);
	gc.setBackground (getBackground ());
	gc.fillRectangle (rect);
	gc.drawImage (image, 0, 0);
	gc.dispose ();
	labelPixmap = bitmap.pixmap;
	disabled = new Image (display, bitmap, SWT.IMAGE_DISABLE);
	labelInsensitivePixmap = disabled.pixmap;
	break;
	default:
	error (SWT.ERROR_NOT_IMPLEMENTED);
	}
	}
	int [] argList = {
	OS.XmNlabelType, OS.XmPIXMAP,
	OS.XmNlabelPixmap, labelPixmap,
	OS.XmNlabelInsensitivePixmap, labelInsensitivePixmap,
	};
	OS.XtSetValues (handle, argList, argList.length / 2);
	}
	boolean setBounds (int x, int y, int width, int height, boolean move, boolean resize) {
	boolean changed = super.setBounds (x, y, width, height, move, resize);
	if (changed && resize && (style & SWT.WRAP) != 0) setText (text);
	return changed;
	}
	public void setFont (Font font) {
	super.setFont (font);
	if ((style & SWT.WRAP) != 0) setText (text);
	}
	/**
	* 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();
	setBitmap (this.image = image);
	}
	/**
	* Sets the receiver's text.
	* <p>
	* This method sets the widget label. The label may include
	* the mnemonic characters and line delimiters.
	* </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;
	text = string;

	/* Strip out mnemonic marker symbols, and remember the mnemonic. */
	char [] unicode = new char [string.length ()];
	string.getChars (0, unicode.length, unicode, 0);
	int i=0, j=0, mnemonic=0;
	while (i < unicode.length) {
	if ((unicode [j++] = unicode [i++]) == Mnemonic) {
	if (i == unicode.length) {continue;}
	if (unicode [i] == Mnemonic) {i++; continue;}
	if (mnemonic == 0) mnemonic = unicode [i];
	j--;
	}
	}
	while (j < unicode.length) unicode [j++] = 0;

	/* Wrap the text if necessary, and convert to mbcs. */
	byte [] buffer;
	if ((style & SWT.WRAP) != 0) {
	int [] argList = {
	OS.XmNwidth, 0, /* 1 */
	OS.XmNmarginLeft, 0, /* 3 */
	OS.XmNmarginRight, 0, /* 5 */
	OS.XmNborderWidth, 0, /* 7 */
	OS.XmNmarginWidth, 0, /* 9 */
	};
	OS.XtGetValues (handle, argList, argList.length / 2);
	int width = argList [1] - argList [3] - argList [5] - argList [7] * 2 - argList [9] * 2;
	Display display = getDisplay ();
	if (mnemonic != 0) string = new String (unicode);
	string = display.wrapText (string, font, width);
	buffer = Converter.wcsToMbcs (getCodePage (), string, true);
	} else {
	buffer = Converter.wcsToMbcs (getCodePage (), unicode, true);
	}

	int xmString = OS.XmStringGenerate(buffer, null, OS.XmCHARSET_TEXT, null);
	if (xmString == 0) error (SWT.ERROR_CANNOT_SET_TEXT);

	/*
	* Bug in Solaris. If a mnemonic is defined to be a character
	* that appears in a string in a position that follows a '\n',
	* Solaris segment faults. For example, a label with text
	* "Hello\nthe&re" would GP since "r" appears after '\n'.
	*
	* The fix is to remove mnemonics from labels that contain
	* '\n', which is fine since such labels generally just act
	* as descriptive texts anyways.
	*/
	if (mnemonic == 0 \|\| string.indexOf ('\n') != -1) {
	mnemonic = OS.XK_VoidSymbol;
	}
	int [] argList = {
	OS.XmNlabelType, OS.XmSTRING,
	OS.XmNlabelString, xmString,
	OS.XmNmnemonic, mnemonic,
	};
	OS.XtSetValues (handle, argList, argList.length / 2);
	if (xmString != 0) OS.XmStringFree (xmString);
	}
	}