bundles/org.eclipse.swt/Eclipse SWT/carbon/org/eclipse/swt/graphics/Font.java - platform/eclipse.platform.swt - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2003 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are 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
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.swt.graphics;


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

 /**
  * Instances of this class manage operating system resources that
  * define how text looks when it is displayed. Fonts may be constructed
  * by providing a device and either name, size and style information
  * or a <code>FontData</code> object which encapsulates this data.
  * <p>
  * Application code must explicitly invoke the <code>Font.dispose()</code>
  * method to release the operating system resources managed by each instance
  * when those instances are no longer required.
  * </p>
  *
  * @see FontData
  */
 public final class Font {

 	/**
 	 * the handle to the OS font resource
 	 * (Warning: This field is platform dependent)
 	 */
 	public int handle;

 	/**
 	 * the id to the OS font (a FMFontFamily)
 	 * (Warning: This field is platform dependent)
 	 */
 	public short id;

 	/**
 	 * the style to the OS font (a FMFontStyle)
 	 * (Warning: This field is platform dependent)
 	 */
 	public short style;

 	/**
 	 * the size to the OS font
 	 * (Warning: This field is platform dependent)
 	 */
 	public short size;

 	/**
 	 * The device where this font was created.
 	 */
 	Device device;

 	/**
 	 * The ATSUI style for the font.
 	 */
 	int atsuiStyle;

 Font() {
 }

 /**
  * Constructs a new font given a device and font data
  * which describes the desired font's appearance.
  * <p>
  * You must dispose the font when it is no longer required.
  * </p>
  *
  * @param device the device to create the font on
  * @param fd the FontData that describes the desired font (must not be null)
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
  *    <li>ERROR_NULL_ARGUMENT - if the fd argument is null</li>
  * </ul>
  * @exception SWTError <ul>
  *    <li>ERROR_NO_HANDLES - if a font could not be created from the given font data</li>
  * </ul>
  */
 public Font(Device device, FontData fd) {
 	if (device == null) device = Device.getDevice();
 	if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
 	if (fd == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
 	init(device, fd.getName(), fd.getHeight(), fd.getStyle());
 }

 /**
  * Constructs a new font given a device and an array
  * of font data which describes the desired font's
  * appearance.
  * <p>
  * You must dispose the font when it is no longer required.
  * </p>
  *
  * @param device the device to create the font on
  * @param fds the array of FontData that describes the desired font (must not be null)
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
  *    <li>ERROR_NULL_ARGUMENT - if the fds argument is null</li>
  *    <li>ERROR_INVALID_ARGUMENT - if the length of fds is zero</li>
  *    <li>ERROR_NULL_ARGUMENT - if any fd in the array is null</li>
  * </ul>
  * @exception SWTError <ul>
  *    <li>ERROR_NO_HANDLES - if a font could not be created from the given font data</li>
  * </ul>
  *
  * @since 2.1
  */
 public Font(Device device, FontData[] fds) {
 	if (device == null) device = Device.getDevice();
 	if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
 	if (fds == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
 	if (fds.length == 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
 	FontData fd = fds[0];
 	if (fd == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
 	init(device,fd.getName(), fd.getHeight(), fd.getStyle());
 }

 /**
  * Constructs a new font given a device, a font name,
  * the height of the desired font in points, and a font
  * style.
  * <p>
  * You must dispose the font when it is no longer required.
  * </p>
  *
  * @param device the device to create the font on
  * @param name the name of the font (must not be null)
  * @param height the font height in points
  * @param style a bit or combination of NORMAL, BOLD, ITALIC
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
  *    <li>ERROR_NULL_ARGUMENT - if the name argument is null</li>
  *    <li>ERROR_INVALID_ARGUMENT - if the height is negative</li>
  * </ul>
  * @exception SWTError <ul>
  *    <li>ERROR_NO_HANDLES - if a font could not be created from the given arguments</li>
  * </ul>
  */
 public Font(Device device, String name, int height, int style) {
 	if (device == null) device = Device.getDevice();
 	if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
 	init(device, name, height, style);
 }

 int createStyle () {
 	int[] buffer = new int[1];
 	OS.ATSUCreateStyle(buffer);
 	if (buffer[0] == 0) SWT.error(SWT.ERROR_NO_HANDLES);

 	/*
 	* This code is intentionaly commented, since it forces ATSUI to
 	* syntesize fonts.
 	*/
 //	int ptr = OS.NewPtr(16);
 //	OS.memcpy(ptr + 8, new byte[]{(style & OS.bold) != 0 ? (byte)1 : 0}, 1);
 //	OS.memcpy(ptr + 9, new byte[]{(style & OS.italic) != 0 ? (byte)1 : 0}, 1);
 //	int[] tags = new int[]{OS.kATSUFontTag, OS.kATSUSizeTag, OS.kATSUQDBoldfaceTag, OS.kATSUQDItalicTag};
 //	int[] sizes = new int[]{4, 4, 1, 1};
 //	int[] values = new int[]{ptr, ptr + 4, ptr + 8, ptr + 9};
 	int ptr = OS.NewPtr(16);
 	OS.memcpy(ptr, new int[]{handle}, 4);
 	OS.memcpy(ptr + 4, new int[]{OS.X2Fix(size)}, 4);
 	int[] tags = new int[]{OS.kATSUFontTag, OS.kATSUSizeTag};
 	int[] sizes = new int[]{4, 4};
 	int[] values = new int[]{ptr, ptr + 4};
 	OS.ATSUSetAttributes(buffer[0], tags.length, tags, sizes, values);
 	OS.DisposePtr(ptr);

 	short[] types = {
 		OS.kLigaturesType,
 		OS.kLigaturesType,
 		OS.kLigaturesType,
 		OS.kLigaturesType,
 		OS.kLigaturesType,
 		OS.kLigaturesType,
 		OS.kLigaturesType,
 		OS.kLigaturesType,
 	};
 	short[] selectors = {
 		OS.kRequiredLigaturesOffSelector,
 		OS.kCommonLigaturesOffSelector,
 		OS.kRareLigaturesOffSelector,
 		OS.kLogosOffSelector,
 		OS.kRebusPicturesOffSelector,
 		OS.kDiphthongLigaturesOffSelector,
 		OS.kSquaredLigaturesOffSelector,
 		OS.kAbbrevSquaredLigaturesOffSelector,
 		OS.kSymbolLigaturesOffSelector,
 	};
 	OS.ATSUSetFontFeatures(buffer[0], types.length, types, selectors);
 	return buffer [0];
 }

 /**
  * Disposes of the operating system resources associated with
  * the font. Applications must dispose of all fonts which
  * they allocate.
  */
 public void dispose() {
 	if (handle == 0) return;
 	handle = 0;
 	id = -1;
 	if (atsuiStyle != 0) OS.ATSUDisposeStyle(atsuiStyle);
 	atsuiStyle = 0;
 	device = null;
 }

 /**
  * Compares the argument to the receiver, and returns true
  * if they represent the <em>same</em> object using a class
  * specific comparison.
  *
  * @param object the object to compare with this object
  * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise
  *
  * @see #hashCode
  */
 public boolean equals(Object object) {
 	if (object == this) return true;
 	if (!(object instanceof Font)) return false;
 	Font font = (Font)object;
 	return handle == font.handle && size == font.size;
 }

 /**
  * Returns an array of <code>FontData</code>s representing the receiver.
  * On Windows, only one FontData will be returned per font. On X however,
  * a <code>Font</code> object <em>may</em> be composed of multiple X
  * fonts. To support this case, we return an array of font data objects.
  *
  * @return an array of font data objects describing the receiver
  *
  * @exception SWTException <ul>
  *    <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
  * </ul>
  */
 public FontData[] getFontData() {
 	if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
 	int [] actualLength = new int [1];
 	OS.ATSUFindFontName (handle, OS.kFontFamilyName, OS.kFontNoPlatformCode, OS.kFontNoScriptCode, OS.kFontNoLanguageCode, 0, null, actualLength, null);
 	byte[] buffer = new byte[actualLength[0]];
 	OS.ATSUFindFontName (handle, OS.kFontFamilyName, OS.kFontNoPlatformCode, OS.kFontNoScriptCode, OS.kFontNoLanguageCode, buffer.length, buffer, actualLength, null);
 	String name = new String(buffer);
 	int style = SWT.NORMAL;
 	if ((this.style & OS.italic) != 0) style |= SWT.ITALIC;
 	if ((this.style & OS.bold) != 0) style |= SWT.BOLD;
 	FontData data = new FontData(name, size, style);
 	return new FontData[]{data};
 }

 /**
  * Invokes platform specific functionality to allocate a new font.
  * <p>
  * <b>IMPORTANT:</b> This method is <em>not</em> part of the public
  * API for <code>Font</code>. It is marked public only so that it
  * can be shared within the packages provided by SWT. It is not
  * available on all platforms, and should never be called from
  * application code.
  * </p>
  *
  * @param device the device on which to allocate the color
  * @param handle the handle for the font
  * @param size the size for the font
  *
  * @private
  */
 public static Font carbon_new(Device device, int handle, short id, short style, short size) {
 	if (device == null) device = Device.getDevice();
 	Font font = new Font();
 	font.handle = handle;
 	font.id = id;
 	font.style = style;
 	font.size = size;
 	font.device = device;
 	return font;
 }

 /**
  * Returns an integer hash code for the receiver. Any two
  * objects which return <code>true</code> when passed to
  * <code>equals</code> must return the same value for this
  * method.
  *
  * @return the receiver's hash
  *
  * @see #equals
  */
 public int hashCode() {
 	return handle;
 }

 void init(Device device, String name, int height, int style) {
 	if (name == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
 	if (height < 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
 	byte[] buffer = new byte[256];
 	int length = name.length();
 	if (length > 255) length = 255;
 	buffer[0] = (byte)length;
 	for (int i=0; i<length; i++) {
 		buffer[i+1]= (byte)name.charAt(i);
 	}
 	this.id = OS.FMGetFontFamilyFromName(buffer);
 	if (this.id == OS.kInvalidFontFamily) this.id = OS.GetAppFont();
 	if ((style & SWT.ITALIC) != 0) this.style |= OS.italic;
 	if ((style & SWT.BOLD) != 0) this.style |= OS.bold;
 	this.size = (short)height;
 	int[] font = new int[1];
 	if (OS.FMGetFontFromFontFamilyInstance(id, this.style, font, null) != 0) {
 		SWT.error(SWT.ERROR_NO_HANDLES);
 	}
 	if (font[0] == 0) SWT.error(SWT.ERROR_NO_HANDLES);
 	this.handle = font[0];
 	this.atsuiStyle = createStyle();
 }

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

 /**
  * Returns a string containing a concise, human-readable
  * description of the receiver.
  *
  * @return a string representation of the receiver
  */
 public String toString () {
 	if (isDisposed()) return "Font {*DISPOSED*}";
 	return "Font {" + handle + "}";
 }

 }
	/*******************************************************************************
	* Copyright (c) 2000, 2003 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are 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
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.swt.graphics;


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

	/**
	* Instances of this class manage operating system resources that
	* define how text looks when it is displayed. Fonts may be constructed
	* by providing a device and either name, size and style information
	* or a <code>FontData</code> object which encapsulates this data.
	* <p>
	* Application code must explicitly invoke the <code>Font.dispose()</code>
	* method to release the operating system resources managed by each instance
	* when those instances are no longer required.
	* </p>
	*
	* @see FontData
	*/
	public final class Font {

	/**
	* the handle to the OS font resource
	* (Warning: This field is platform dependent)
	*/
	public int handle;

	/**
	* the id to the OS font (a FMFontFamily)
	* (Warning: This field is platform dependent)
	*/
	public short id;

	/**
	* the style to the OS font (a FMFontStyle)
	* (Warning: This field is platform dependent)
	*/
	public short style;

	/**
	* the size to the OS font
	* (Warning: This field is platform dependent)
	*/
	public short size;

	/**
	* The device where this font was created.
	*/
	Device device;

	/**
	* The ATSUI style for the font.
	*/
	int atsuiStyle;

	Font() {
	}

	/**
	* Constructs a new font given a device and font data
	* which describes the desired font's appearance.
	* <p>
	* You must dispose the font when it is no longer required.
	* </p>
	*
	* @param device the device to create the font on
	* @param fd the FontData that describes the desired font (must not be null)
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
	* <li>ERROR_NULL_ARGUMENT - if the fd argument is null</li>
	* </ul>
	* @exception SWTError <ul>
	* <li>ERROR_NO_HANDLES - if a font could not be created from the given font data</li>
	* </ul>
	*/
	public Font(Device device, FontData fd) {
	if (device == null) device = Device.getDevice();
	if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	if (fd == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	init(device, fd.getName(), fd.getHeight(), fd.getStyle());
	}

	/**
	* Constructs a new font given a device and an array
	* of font data which describes the desired font's
	* appearance.
	* <p>
	* You must dispose the font when it is no longer required.
	* </p>
	*
	* @param device the device to create the font on
	* @param fds the array of FontData that describes the desired font (must not be null)
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
	* <li>ERROR_NULL_ARGUMENT - if the fds argument is null</li>
	* <li>ERROR_INVALID_ARGUMENT - if the length of fds is zero</li>
	* <li>ERROR_NULL_ARGUMENT - if any fd in the array is null</li>
	* </ul>
	* @exception SWTError <ul>
	* <li>ERROR_NO_HANDLES - if a font could not be created from the given font data</li>
	* </ul>
	*
	* @since 2.1
	*/
	public Font(Device device, FontData[] fds) {
	if (device == null) device = Device.getDevice();
	if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	if (fds == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	if (fds.length == 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	FontData fd = fds[0];
	if (fd == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	init(device,fd.getName(), fd.getHeight(), fd.getStyle());
	}

	/**
	* Constructs a new font given a device, a font name,
	* the height of the desired font in points, and a font
	* style.
	* <p>
	* You must dispose the font when it is no longer required.
	* </p>
	*
	* @param device the device to create the font on
	* @param name the name of the font (must not be null)
	* @param height the font height in points
	* @param style a bit or combination of NORMAL, BOLD, ITALIC
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
	* <li>ERROR_NULL_ARGUMENT - if the name argument is null</li>
	* <li>ERROR_INVALID_ARGUMENT - if the height is negative</li>
	* </ul>
	* @exception SWTError <ul>
	* <li>ERROR_NO_HANDLES - if a font could not be created from the given arguments</li>
	* </ul>
	*/
	public Font(Device device, String name, int height, int style) {
	if (device == null) device = Device.getDevice();
	if (device == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	init(device, name, height, style);
	}

	int createStyle () {
	int[] buffer = new int[1];
	OS.ATSUCreateStyle(buffer);
	if (buffer[0] == 0) SWT.error(SWT.ERROR_NO_HANDLES);

	/*
	* This code is intentionaly commented, since it forces ATSUI to
	* syntesize fonts.
	*/
	// int ptr = OS.NewPtr(16);
	// OS.memcpy(ptr + 8, new byte[]{(style & OS.bold) != 0 ? (byte)1 : 0}, 1);
	// OS.memcpy(ptr + 9, new byte[]{(style & OS.italic) != 0 ? (byte)1 : 0}, 1);
	// int[] tags = new int[]{OS.kATSUFontTag, OS.kATSUSizeTag, OS.kATSUQDBoldfaceTag, OS.kATSUQDItalicTag};
	// int[] sizes = new int[]{4, 4, 1, 1};
	// int[] values = new int[]{ptr, ptr + 4, ptr + 8, ptr + 9};
	int ptr = OS.NewPtr(16);
	OS.memcpy(ptr, new int[]{handle}, 4);
	OS.memcpy(ptr + 4, new int[]{OS.X2Fix(size)}, 4);
	int[] tags = new int[]{OS.kATSUFontTag, OS.kATSUSizeTag};
	int[] sizes = new int[]{4, 4};
	int[] values = new int[]{ptr, ptr + 4};
	OS.ATSUSetAttributes(buffer[0], tags.length, tags, sizes, values);
	OS.DisposePtr(ptr);

	short[] types = {
	OS.kLigaturesType,
	OS.kLigaturesType,
	OS.kLigaturesType,
	OS.kLigaturesType,
	OS.kLigaturesType,
	OS.kLigaturesType,
	OS.kLigaturesType,
	OS.kLigaturesType,
	};
	short[] selectors = {
	OS.kRequiredLigaturesOffSelector,
	OS.kCommonLigaturesOffSelector,
	OS.kRareLigaturesOffSelector,
	OS.kLogosOffSelector,
	OS.kRebusPicturesOffSelector,
	OS.kDiphthongLigaturesOffSelector,
	OS.kSquaredLigaturesOffSelector,
	OS.kAbbrevSquaredLigaturesOffSelector,
	OS.kSymbolLigaturesOffSelector,
	};
	OS.ATSUSetFontFeatures(buffer[0], types.length, types, selectors);
	return buffer [0];
	}

	/**
	* Disposes of the operating system resources associated with
	* the font. Applications must dispose of all fonts which
	* they allocate.
	*/
	public void dispose() {
	if (handle == 0) return;
	handle = 0;
	id = -1;
	if (atsuiStyle != 0) OS.ATSUDisposeStyle(atsuiStyle);
	atsuiStyle = 0;
	device = null;
	}

	/**
	* Compares the argument to the receiver, and returns true
	* if they represent the <em>same</em> object using a class
	* specific comparison.
	*
	* @param object the object to compare with this object
	* @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise
	*
	* @see #hashCode
	*/
	public boolean equals(Object object) {
	if (object == this) return true;
	if (!(object instanceof Font)) return false;
	Font font = (Font)object;
	return handle == font.handle && size == font.size;
	}

	/**
	* Returns an array of <code>FontData</code>s representing the receiver.
	* On Windows, only one FontData will be returned per font. On X however,
	* a <code>Font</code> object <em>may</em> be composed of multiple X
	* fonts. To support this case, we return an array of font data objects.
	*
	* @return an array of font data objects describing the receiver
	*
	* @exception SWTException <ul>
	* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
	* </ul>
	*/
	public FontData[] getFontData() {
	if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
	int [] actualLength = new int [1];
	OS.ATSUFindFontName (handle, OS.kFontFamilyName, OS.kFontNoPlatformCode, OS.kFontNoScriptCode, OS.kFontNoLanguageCode, 0, null, actualLength, null);
	byte[] buffer = new byte[actualLength[0]];
	OS.ATSUFindFontName (handle, OS.kFontFamilyName, OS.kFontNoPlatformCode, OS.kFontNoScriptCode, OS.kFontNoLanguageCode, buffer.length, buffer, actualLength, null);
	String name = new String(buffer);
	int style = SWT.NORMAL;
	if ((this.style & OS.italic) != 0) style \|= SWT.ITALIC;
	if ((this.style & OS.bold) != 0) style \|= SWT.BOLD;
	FontData data = new FontData(name, size, style);
	return new FontData[]{data};
	}

	/**
	* Invokes platform specific functionality to allocate a new font.
	* <p>
	* <b>IMPORTANT:</b> This method is <em>not</em> part of the public
	* API for <code>Font</code>. It is marked public only so that it
	* can be shared within the packages provided by SWT. It is not
	* available on all platforms, and should never be called from
	* application code.
	* </p>
	*
	* @param device the device on which to allocate the color
	* @param handle the handle for the font
	* @param size the size for the font
	*
	* @private
	*/
	public static Font carbon_new(Device device, int handle, short id, short style, short size) {
	if (device == null) device = Device.getDevice();
	Font font = new Font();
	font.handle = handle;
	font.id = id;
	font.style = style;
	font.size = size;
	font.device = device;
	return font;
	}

	/**
	* Returns an integer hash code for the receiver. Any two
	* objects which return <code>true</code> when passed to
	* <code>equals</code> must return the same value for this
	* method.
	*
	* @return the receiver's hash
	*
	* @see #equals
	*/
	public int hashCode() {
	return handle;
	}

	void init(Device device, String name, int height, int style) {
	if (name == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	if (height < 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	byte[] buffer = new byte[256];
	int length = name.length();
	if (length > 255) length = 255;
	buffer[0] = (byte)length;
	for (int i=0; i<length; i++) {
	buffer[i+1]= (byte)name.charAt(i);
	}
	this.id = OS.FMGetFontFamilyFromName(buffer);
	if (this.id == OS.kInvalidFontFamily) this.id = OS.GetAppFont();
	if ((style & SWT.ITALIC) != 0) this.style \|= OS.italic;
	if ((style & SWT.BOLD) != 0) this.style \|= OS.bold;
	this.size = (short)height;
	int[] font = new int[1];
	if (OS.FMGetFontFromFontFamilyInstance(id, this.style, font, null) != 0) {
	SWT.error(SWT.ERROR_NO_HANDLES);
	}
	if (font[0] == 0) SWT.error(SWT.ERROR_NO_HANDLES);
	this.handle = font[0];
	this.atsuiStyle = createStyle();
	}

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

	/**
	* Returns a string containing a concise, human-readable
	* description of the receiver.
	*
	* @return a string representation of the receiver
	*/
	public String toString () {
	if (isDisposed()) return "Font {DISPOSED}";
	return "Font {" + handle + "}";
	}

	}