Mercurial > projects > dwt-win
view dwt/graphics/TextStyle.d @ 194:3afcd4ddcf90
Update to SWT 3.3.2
author | Frank Benoit <benoit@tionex.de> |
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date | Wed, 19 Mar 2008 21:48:31 +0100 |
parents | 97c2675aca38 |
children | ab60f3309436 |
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/******************************************************************************* * Copyright (c) 2000, 2006 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 dwt.graphics.TextStyle; import dwt.DWT; import dwt.graphics.Font; import dwt.graphics.Color; import dwt.graphics.GlyphMetrics; import tango.util.Convert; /** * <code>TextStyle</code> defines a set of styles that can be applied * to a range of text. * <p> * The hashCode() method in this class uses the values of the public * fields to compute the hash value. When storing instances of the * class in hashed collections, do not modify these fields after the * object has been inserted. * </p> * <p> * Application code does <em>not</em> need to explicitly release the * resources managed by each instance when those instances are no longer * required, and thus no <code>dispose()</code> method is provided. * </p> * * @see TextLayout * @see Font * @see Color * * @since 3.0 */ public class TextStyle { /** * the font of the style */ public Font font; /** * the foreground of the style */ public Color foreground; /** * the background of the style */ public Color background; /** * the underline flag of the style * * @since 3.1 */ public bool underline; /** * the strikeout flag of the style * * @since 3.1 */ public bool strikeout; /** * the GlyphMetrics of the style * * @since 3.2 */ public GlyphMetrics metrics; /** * the baseline rise of the style. * * @since 3.2 */ public int rise; /++ + DWT extension for clone implementation +/ protected this( TextStyle other ){ font = other.font; foreground = other.foreground; background = other.background; underline = other.underline; strikeout = other.strikeout; metrics = other.metrics; rise = other.rise; } /** * Create a new text style with the specified font, foreground * and background. * * @param font the font of the style, <code>null</code> if none * @param foreground the foreground color of the style, <code>null</code> if none * @param background the background color of the style, <code>null</code> if none */ public this (Font font, Color foreground, Color background) { if (font !is null && font.isDisposed()) DWT.error (DWT.ERROR_INVALID_ARGUMENT); if (foreground !is null && foreground.isDisposed()) DWT.error (DWT.ERROR_INVALID_ARGUMENT); if (background !is null && background.isDisposed()) DWT.error (DWT.ERROR_INVALID_ARGUMENT); this.font = font; this.foreground = foreground; this.background = background; } /** * 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 override int opEquals(Object object) { if (object is this) return true; if (object is null) return false; if (!(cast(TextStyle)object)) return false; TextStyle style = cast(TextStyle)object; if (foreground !is null) { if ( foreground !is style.foreground ) return false; } else if (style.foreground !is null) return false; if (background !is null) { if ( background !is style.background ) return false; } else if (style.background !is null) return false; if (font !is null) { if (font !is style.font) return false; } else if (style.font !is null) return false; if (metrics !is null || style.metrics !is null) return false; if (underline !is style.underline) return false; if (strikeout !is style.strikeout) return false; if (rise !is style.rise) return false; return true; } /** * 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(Object) */ public override hash_t toHash() { int hash = 0; if (foreground !is null) hash ^= foreground.toHash(); if (background !is null) hash ^= background.toHash(); if (font !is null) hash ^= font.toHash(); if (metrics !is null) hash ^= metrics.toHash(); if (underline) hash ^= hash; if (strikeout) hash ^= hash; hash ^= rise; return hash; } /** * Returns a string containing a concise, human-readable * description of the receiver. * * @return a string representation of the <code>TextStyle</code> */ override public char[] toString () { char[] buffer = "TextStyle {"; int startLength = buffer.length; if (font !is null) { if (buffer.length > startLength) buffer ~= ", "; buffer ~= "font="; buffer ~= font.toString; } if (foreground !is null) { if (buffer.length > startLength) buffer ~= ", "; buffer ~= "foreground="; buffer ~= foreground.toString; } if (background !is null) { if (buffer.length > startLength) buffer ~= ", "; buffer ~= "background="; buffer ~= background.toString; } if (underline) { if (buffer.length > startLength) buffer ~= ", "; buffer ~= "underlined"; } if (strikeout) { if (buffer.length > startLength) buffer ~= ", "; buffer ~= "striked out"; } if (rise !is 0) { if (buffer.length > startLength) buffer ~= ", "; buffer ~= "rise="; buffer ~= to!(char[])(rise); } if (metrics !is null) { if (buffer.length > startLength) buffer ~= ", "; buffer ~= "metrics="; buffer ~= metrics.toString; } buffer ~= "}"; return buffer; } }