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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 | } | ||