Mercurial > projects > dwt2
diff org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/graphics/Font.d @ 0:6dd524f61e62
add dwt win and basic java stuff
author | Frank Benoit <benoit@tionex.de> |
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date | Mon, 02 Mar 2009 14:44:16 +0100 |
parents | |
children | 6bf2837c50fe |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/graphics/Font.d Mon Mar 02 14:44:16 2009 +0100 @@ -0,0 +1,278 @@ +/******************************************************************************* + * 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 + * Port to the D programming language: + * Frank Benoit <benoit@tionex.de> + *******************************************************************************/ +module org.eclipse.swt.graphics.Font; + +import org.eclipse.swt.SWT; +import org.eclipse.swt.SWTError; +import org.eclipse.swt.SWTException; +import org.eclipse.swt.internal.win32.OS; + +import org.eclipse.swt.graphics.Resource; +import org.eclipse.swt.graphics.FontData; +import org.eclipse.swt.graphics.Device; + +import tango.text.convert.Format; +import java.lang.all; +//import tango.stdc.stringz; + +/** + * 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 + * @see <a href="http://www.eclipse.org/swt/snippets/#font">Font snippets</a> + * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Examples: GraphicsExample, PaintExample</a> + * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> + */ + +public final class Font : Resource { + + alias Resource.init_ init_; + /** + * the handle to the OS font resource + * (Warning: This field is platform dependent) + * <p> + * <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT + * public API. It is marked public only so that it can be shared + * within the packages provided by SWT. It is not available on all + * platforms and should never be accessed from application code. + * </p> + */ + public HFONT handle; + +/** + * Prevents uninitialized instances from being created outside the package. + */ +this(Device device) { + super(device); +} + +/** + * 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 this(Device device, FontData fd) { + super(device); + init_(fd); + init_(); +} + +/** + * 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 this(Device device, FontData[] fds) { + super(device); + if (fds is null) SWT.error(SWT.ERROR_NULL_ARGUMENT); + if (fds.length is 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT); + for (int i=0; i<fds.length; i++) { + if (fds[i] is null) SWT.error(SWT.ERROR_INVALID_ARGUMENT); + } + init_(fds[0]); + init_(); +} + +/** + * 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 this(Device device, String name, int height, int style) { + super(device); + if (name is null) SWT.error(SWT.ERROR_NULL_ARGUMENT); + init_(new FontData (name, height, style)); + init_(); +} + +/*public*/ this(Device device, String name, float height, int style) { + super(device); + if (name is null) SWT.error(SWT.ERROR_NULL_ARGUMENT); + init_(new FontData (name, height, style)); + init_(); +} +void destroy() { + OS.DeleteObject(handle); + handle = 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 int opEquals(Object object) { + if (object is this) return true; + if ( auto font = cast(Font)object ){ + return device is font.device && handle is font.handle; + } + return false; +} + +/** + * 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); + LOGFONT logFont; + OS.GetObject(handle, LOGFONT.sizeof, &logFont); + return [ cast(FontData) FontData.win32_new(&logFont, device.computePoints(&logFont, handle))]; +} + +/** + * Returns an integer hash code for the receiver. Any two + * objects that 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 + */ +override public hash_t toHash () { + return cast(hash_t)handle; +} + +void init_ (FontData fd) { + if (fd is null) SWT.error(SWT.ERROR_NULL_ARGUMENT); + LOGFONT* logFont = &fd.data; + int lfHeight = logFont.lfHeight; + logFont.lfHeight = device.computePixels(fd.height); + handle = OS.CreateFontIndirect(logFont); + logFont.lfHeight = lfHeight; + if (handle is null) SWT.error(SWT.ERROR_NO_HANDLES); +} + +/** + * 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 + */ +override public bool isDisposed() { + return handle is null; +} + +/** + * Returns a string containing a concise, human-readable + * description of the receiver. + * + * @return a string representation of the receiver + */ +override public String toString () { + if (isDisposed()) return "Font {*DISPOSED*}"; + return Format( "Font {{{}}", handle ); +// +// LOGFONT logFont; +// OS.GetObject(handle, LOGFONT.sizeof, &logFont); +// char[] name = .TCHARzToStr( logFont.lfFaceName.ptr, -1 ); +// +// return Format( "Font {{{}, {}}", handle, name ); +} + +/** + * 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 + * @return a new font object containing the specified device and handle + */ +public static Font win32_new(Device device, HFONT handle) { + Font font = new Font(device); + font.disposeChecking = false; + font.handle = handle; + return font; +} + +}