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| 1 | +/* | |
| 2 | + * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package sun.awt; | |
| 27 | + | |
| 28 | +import java.awt.*; | |
| 29 | + | |
| 30 | +import sun.util.logging.PlatformLogger; | |
| 31 | + | |
| 32 | +public abstract class SunGraphicsCallback { | |
| 33 | + public static final int HEAVYWEIGHTS = 0x1; | |
| 34 | + public static final int LIGHTWEIGHTS = 0x2; | |
| 35 | + public static final int TWO_PASSES = 0x4; | |
| 36 | + | |
| 37 | + private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.SunGraphicsCallback"); | |
| 38 | + | |
| 39 | + public abstract void run(Component comp, Graphics cg); | |
| 40 | + | |
| 41 | + protected void constrainGraphics(Graphics g, Rectangle bounds) { | |
| 42 | + if (g instanceof ConstrainableGraphics) { | |
| 43 | + ((ConstrainableGraphics)g).constrain(bounds.x, bounds.y, bounds.width, bounds.height); | |
| 44 | + } else { | |
| 45 | + g.translate(bounds.x, bounds.y); | |
| 46 | + } | |
| 47 | + g.clipRect(0, 0, bounds.width, bounds.height); | |
| 48 | + } | |
| 49 | + | |
| 50 | + public final void runOneComponent(Component comp, Rectangle bounds, | |
| 51 | + Graphics g, Shape clip, | |
| 52 | + int weightFlags) { | |
| 53 | + if (comp == null || comp.getPeer() == null || !comp.isVisible()) { | |
| 54 | + return; | |
| 55 | + } | |
| 56 | + boolean lightweight = comp.isLightweight(); | |
| 57 | + if ((lightweight && (weightFlags & LIGHTWEIGHTS) == 0) || | |
| 58 | + (!lightweight && (weightFlags & HEAVYWEIGHTS) == 0)) { | |
| 59 | + return; | |
| 60 | + } | |
| 61 | + | |
| 62 | + if (bounds == null) { | |
| 63 | + bounds = comp.getBounds(); | |
| 64 | + } | |
| 65 | + | |
| 66 | + if (clip == null || clip.intersects(bounds)) { | |
| 67 | + Graphics cg = g.create(); | |
| 68 | + try { | |
| 69 | + constrainGraphics(cg, bounds); | |
| 70 | + cg.setFont(comp.getFont()); | |
| 71 | + cg.setColor(comp.getForeground()); | |
| 72 | + if (cg instanceof Graphics2D) { | |
| 73 | + ((Graphics2D)cg).setBackground(comp.getBackground()); | |
| 74 | + } else if (cg instanceof Graphics2Delegate) { | |
| 75 | + ((Graphics2Delegate)cg).setBackground( | |
| 76 | + comp.getBackground()); | |
| 77 | + } | |
| 78 | + run(comp, cg); | |
| 79 | + } finally { | |
| 80 | + cg.dispose(); | |
| 81 | + } | |
| 82 | + } | |
| 83 | + } | |
| 84 | + | |
| 85 | + public final void runComponents(Component[] comps, Graphics g, | |
| 86 | + int weightFlags) { | |
| 87 | + int ncomponents = comps.length; | |
| 88 | + Shape clip = g.getClip(); | |
| 89 | + | |
| 90 | + if (log.isLoggable(PlatformLogger.FINER) && (clip != null)) { | |
| 91 | + Rectangle newrect = clip.getBounds(); | |
| 92 | + log.finer("x = " + newrect.x + ", y = " + newrect.y + | |
| 93 | + ", width = " + newrect.width + | |
| 94 | + ", height = " + newrect.height); | |
| 95 | + } | |
| 96 | + | |
| 97 | + // A seriously sad hack-- | |
| 98 | + // Lightweight components always paint behind peered components, | |
| 99 | + // even if they are at the top of the Z order. We emulate this | |
| 100 | + // behavior by making two printing passes: the first for lightweights; | |
| 101 | + // the second for heavyweights. | |
| 102 | + // | |
| 103 | + // ToDo(dpm): Either build a list of heavyweights during the | |
| 104 | + // lightweight pass, or redesign the components array to keep | |
| 105 | + // lightweights and heavyweights separate. | |
| 106 | + if ((weightFlags & TWO_PASSES) != 0) { | |
| 107 | + for (int i = ncomponents - 1; i >= 0; i--) { | |
| 108 | + runOneComponent(comps[i], null, g, clip, LIGHTWEIGHTS); | |
| 109 | + } | |
| 110 | + for (int i = ncomponents - 1; i >= 0; i--) { | |
| 111 | + runOneComponent(comps[i], null, g, clip, HEAVYWEIGHTS); | |
| 112 | + } | |
| 113 | + } else { | |
| 114 | + for (int i = ncomponents - 1; i >= 0; i--) { | |
| 115 | + runOneComponent(comps[i], null, g, clip, weightFlags); | |
| 116 | + } | |
| 117 | + } | |
| 118 | + } | |
| 119 | + | |
| 120 | + public static final class PaintHeavyweightComponentsCallback | |
| 121 | + extends SunGraphicsCallback | |
| 122 | + { | |
| 123 | + private static PaintHeavyweightComponentsCallback instance = | |
| 124 | + new PaintHeavyweightComponentsCallback(); | |
| 125 | + | |
| 126 | + private PaintHeavyweightComponentsCallback() {} | |
| 127 | + public void run(Component comp, Graphics cg) { | |
| 128 | + if (!comp.isLightweight()) { | |
| 129 | + comp.paintAll(cg); | |
| 130 | + } else if (comp instanceof Container) { | |
| 131 | + runComponents(((Container)comp).getComponents(), cg, | |
| 132 | + LIGHTWEIGHTS | HEAVYWEIGHTS); | |
| 133 | + } | |
| 134 | + } | |
| 135 | + public static PaintHeavyweightComponentsCallback getInstance() { | |
| 136 | + return instance; | |
| 137 | + } | |
| 138 | + } | |
| 139 | + public static final class PrintHeavyweightComponentsCallback | |
| 140 | + extends SunGraphicsCallback | |
| 141 | + { | |
| 142 | + private static PrintHeavyweightComponentsCallback instance = | |
| 143 | + new PrintHeavyweightComponentsCallback(); | |
| 144 | + | |
| 145 | + private PrintHeavyweightComponentsCallback() {} | |
| 146 | + public void run(Component comp, Graphics cg) { | |
| 147 | + if (!comp.isLightweight()) { | |
| 148 | + comp.printAll(cg); | |
| 149 | + } else if (comp instanceof Container) { | |
| 150 | + runComponents(((Container)comp).getComponents(), cg, | |
| 151 | + LIGHTWEIGHTS | HEAVYWEIGHTS); | |
| 152 | + } | |
| 153 | + } | |
| 154 | + public static PrintHeavyweightComponentsCallback getInstance() { | |
| 155 | + return instance; | |
| 156 | + } | |
| 157 | + } | |
| 158 | +} | |