J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2002-2007 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | package sun.awt.X11; |
| 26 | |
| 27 | import java.awt.*; |
| 28 | import java.awt.peer.*; |
| 29 | |
| 30 | import sun.awt.ComponentAccessor; |
| 31 | import sun.awt.SunToolkit; |
| 32 | |
| 33 | import sun.awt.X11GraphicsConfig; |
| 34 | import sun.awt.X11GraphicsDevice; |
| 35 | |
| 36 | class XCanvasPeer extends XComponentPeer implements CanvasPeer { |
| 37 | |
| 38 | private boolean eraseBackgroundDisabled; |
| 39 | |
| 40 | XCanvasPeer() {} |
| 41 | |
| 42 | XCanvasPeer(XCreateWindowParams params) { |
| 43 | super(params); |
| 44 | } |
| 45 | |
| 46 | XCanvasPeer(Component target) { |
| 47 | super(target); |
| 48 | } |
| 49 | |
| 50 | void preInit(XCreateWindowParams params) { |
| 51 | super.preInit(params); |
| 52 | if (SunToolkit.getSunAwtNoerasebackground()) { |
| 53 | disableBackgroundErase(); |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | void resetTargetGC(Component target) { |
| 58 | ComponentAccessor.resetGC(target); |
| 59 | } |
| 60 | |
| 61 | /* |
| 62 | * Called when the Window this |
| 63 | * Canvas is on is moved onto another Xinerama screen. |
| 64 | * |
| 65 | * Canvases can be created with a non-defulat GraphicsConfiguration. The |
| 66 | * GraphicsConfiguration needs to be changed to one on the new screen, |
| 67 | * preferably with the same visual ID. |
| 68 | * |
| 69 | * Up-called for other windows peer instances (XPanelPeer, XWindowPeer). |
| 70 | * |
| 71 | * Should only be called from the event thread. |
| 72 | */ |
| 73 | public void displayChanged(int screenNum) { |
| 74 | resetLocalGC(screenNum); |
| 75 | resetTargetGC(target); |
| 76 | } |
| 77 | |
| 78 | /* Set graphicsConfig to a GraphicsConfig with the same visual on the new |
| 79 | * screen, which should be easy in Xinerama mode. |
| 80 | * |
| 81 | * Should only be called from displayChanged(), and therefore only from |
| 82 | * the event thread. |
| 83 | */ |
| 84 | void resetLocalGC(int screenNum) { |
| 85 | // Opt: Only need to do if we're not using the default GC |
| 86 | if (graphicsConfig != null) { |
| 87 | X11GraphicsConfig parentgc; |
| 88 | // save vis id of current gc |
| 89 | int visual = graphicsConfig.getVisual(); |
| 90 | |
| 91 | X11GraphicsDevice newDev = (X11GraphicsDevice) GraphicsEnvironment. |
| 92 | getLocalGraphicsEnvironment(). |
| 93 | getScreenDevices()[screenNum]; |
| 94 | |
| 95 | for (int i = 0; i < newDev.getNumConfigs(screenNum); i++) { |
| 96 | if (visual == newDev.getConfigVisualId(i, screenNum)) { |
| 97 | // use that |
| 98 | graphicsConfig = (X11GraphicsConfig)newDev.getConfigurations()[i]; |
| 99 | break; |
| 100 | } |
| 101 | } |
| 102 | // just in case... |
| 103 | if (graphicsConfig == null) { |
| 104 | graphicsConfig = (X11GraphicsConfig) GraphicsEnvironment. |
| 105 | getLocalGraphicsEnvironment(). |
| 106 | getScreenDevices()[screenNum]. |
| 107 | getDefaultConfiguration(); |
| 108 | } |
| 109 | } |
| 110 | } |
| 111 | protected boolean shouldFocusOnClick() { |
| 112 | // Canvas should always be able to be focused by mouse clicks. |
| 113 | return true; |
| 114 | } |
| 115 | |
| 116 | public void disableBackgroundErase() { |
| 117 | eraseBackgroundDisabled = true; |
| 118 | } |
| 119 | protected boolean doEraseBackground() { |
| 120 | return !eraseBackgroundDisabled; |
| 121 | } |
| 122 | public void setBackground(Color c) { |
| 123 | boolean doRepaint = false; |
| 124 | if( getPeerBackground() == null || |
| 125 | !getPeerBackground().equals( c ) ) { |
| 126 | doRepaint = true; |
| 127 | } |
| 128 | super.setBackground(c); |
| 129 | if( doRepaint ) { |
| 130 | target.repaint(); |
| 131 | } |
| 132 | } |
| 133 | } |