diff dwt/graphics/TextStyle.d @ 21:d2e87572b721

TextStyle, Transform
author Frank Benoit <benoit@tionex.de>
date Sat, 26 Jan 2008 16:45:05 +0100
parents
children 9a64a7781bab
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwt/graphics/TextStyle.d	Sat Jan 26 16:45:05 2008 +0100
@@ -0,0 +1,203 @@
+/*******************************************************************************
+ * 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;
+
+/**
+ * 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 != style.foreground ) return false;
+    } else if (style.foreground !is null) return false;
+    if (background !is null) {
+        if ( background != style.background ) return false;
+    } else if (style.background !is null) return false;
+    if (font !is null) {
+        if (font != 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>
+ */
+public char[] toString () {
+    char[] buffer = "TextStyle {";
+    int startLength = buffer.length;
+    if (font != null) {
+        if (buffer.length > startLength) buffer ~= ", ";
+        buffer ~= "font=";
+        buffer ~= font.toString;
+    }
+    if (foreground != null) {
+        if (buffer.length > startLength) buffer ~= ", ";
+        buffer ~= "foreground=";
+        buffer ~= foreground.toString;
+    }
+    if (background != 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 != 0) {
+        if (buffer.length > startLength) buffer ~= ", ";
+        buffer ~= "rise=";
+        buffer ~= to!(char[])(rise);
+    }
+    if (metrics != null) {
+        if (buffer.length > startLength) buffer ~= ", ";
+        buffer ~= "metrics=";
+        buffer ~= metrics.toString;
+    }
+    buffer ~= "}";
+    return buffer;
+}
+
+}