001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common
008: * Development and Distribution License("CDDL") (collectively, the
009: * "License"). You may not use this file except in compliance with the
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011: * http://www.netbeans.org/cddl-gplv2.html
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014: * License. When distributing the software, include this License Header
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017: * particular file as subject to the "Classpath" exception as provided
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019: * accompanied this code. If applicable, add the following below the
020: * License Header, with the fields enclosed by brackets [] replaced by
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022: * "Portions Copyrighted [year] [name of copyright owner]"
023: *
024: * Contributor(s):
025: *
026: * The Original Software is NetBeans. The Initial Developer of the Original
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041:
042: /*
043: * ColorSchema.java
044: *
045: * Created on July 21, 2006, 11:02 AM
046: *
047: * To change this template, choose Tools | Template Manager
048: * and open the template in the editor.
049: */
050:
051: package org.netbeans.microedition.lcdui.laf;
052:
053: import javax.microedition.lcdui.Display;
054: import javax.microedition.lcdui.Graphics;
055: import javax.microedition.lcdui.Image;
056:
057: /**
058: * ColorSchema holds information about colors and background
059: * images to be used when drawing custom components based on Canvas
060: * and CustomItem, which support this ColorSchema mechanism.
061: *
062: * @author breh
063: */
064: public abstract class ColorSchema {
065:
066: /**
067: * Gets color based on color specifier. The color specifer
068: * corresponds to values listed in Display class.
069: * @param aColorSpecifier - color specifier from Display.COLOR* constnants
070: * @return color to be used for given specifier
071: * @see javax.microedition.lcdui.Display
072: */
073: public abstract int getColor(int aColorSpecifier);
074:
075: /**
076: * Returns image which should be used as a background.
077: *
078: * @return Image to be drawn. If null is returned, no image will be drawn on background
079: */
080: public abstract Image getBackgroundImage();
081:
082: /**
083: * Gets anchor of the background image. See Graphics class for details
084: * @return anchor where the image should be drawn. Might retun 0 if
085: * no image is used or if the image is going to be tiled.
086: * @see javax.microedition.lcdui.Graphics
087: */
088: public abstract int getBackgroundImageAnchorPoint();
089:
090: /**
091: * If true, background image should be drawn in tiled. Usefull when
092: * using simple patterns to draw background.
093: * @return true when the background image should be tiled, false
094: * if just one image should be drawn based on suggestion of position
095: * by getBackgroundImageAnchorPoint() method
096: * @return true if the backround image should be drawn in tiles, false
097: * if just one instance of background image should be drawn.
098: */
099: public abstract boolean isBackgroundImageTiled();
100:
101: /**
102: * If true the background is transparent. This is helpful for some devices,
103: * for example when drawing custom items on Nokia Seris 40 feature pack 1,
104: * the background does not have to be erased and the custom item looks much
105: * better when transparent
106: * @return true when the background should be transparent, false otherwise
107: */
108: public abstract boolean isBackgroundTransparent();
109:
110: /**
111: * Utility method for painting background do given Graphics object (using current
112: * clipping area). This method is able to paint background, including image
113: * and including tiling the image.
114: * @param g - Graphics to be used to draw background.
115: * @param includeImage - when true, the implementation also draws a background
116: * image if specified, when false, the background image is ignored.
117: */
118: public void paintBackground(Graphics g, boolean includeImage) {
119: if (g == null)
120: throw new IllegalArgumentException(
121: "Graphics parameter cannot be null");
122: int currentColor = g.getColor();
123: final int x = g.getClipX();
124: final int y = g.getClipY();
125: final int width = g.getClipWidth();
126: final int height = g.getClipHeight();
127:
128: if (!this .isBackgroundTransparent()) {
129: // fill the background with background color (only if the background is not transparent)
130: g.setColor(this .getColor(Display.COLOR_BACKGROUND));
131: g.fillRect(x, y, width, height);
132: }
133:
134: final Image backgroundImage = this .getBackgroundImage();
135: if ((backgroundImage != null) && (includeImage)) {
136: if (this .isBackgroundImageTiled()) {
137: // compute width/height stuff
138: final int imageWidth = backgroundImage.getWidth();
139: final int imageHeight = backgroundImage.getHeight();
140: final int cx = width / imageWidth;
141: final int cy = height / imageHeight;
142: //final int rx = width % imageWidth;
143: //final int ry = width % imageHeight;
144: System.out.println("CX = " + cx + "CY =" + cy);
145: for (int i = 0; i <= cx; i++) {
146: for (int j = 0; j <= cy; j++) {
147: g.drawImage(backgroundImage, i * imageWidth, j
148: * imageHeight, Graphics.LEFT
149: | Graphics.TOP);
150: }
151: }
152: } else {
153: final int backgroundImageAnchorPoint = this
154: .getBackgroundImageAnchorPoint();
155: int ix = x;
156: int iy = y;
157: ix = (backgroundImageAnchorPoint & Graphics.RIGHT) > 0 ? width
158: : 0;
159: ix = (backgroundImageAnchorPoint & Graphics.HCENTER) > 0 ? width / 2
160: : ix;
161: iy = (backgroundImageAnchorPoint & Graphics.BOTTOM) > 0 ? height
162: : 0;
163: iy = (backgroundImageAnchorPoint & Graphics.VCENTER) > 0 ? height / 2
164: : iy;
165: g.drawImage(backgroundImage, ix, iy,
166: backgroundImageAnchorPoint);
167: }
168: }
169: // reset the color
170: g.setColor(currentColor);
171: }
172:
173: }
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