| /* |
| * Copyright (c) 2002, 2007, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package sun.awt.X11; |
| |
| import java.awt.*; |
| import java.awt.peer.*; |
| |
| import sun.awt.SunToolkit; |
| |
| import sun.awt.X11GraphicsConfig; |
| import sun.awt.X11GraphicsDevice; |
| |
| class XCanvasPeer extends XComponentPeer implements CanvasPeer { |
| |
| private boolean eraseBackgroundDisabled; |
| |
| XCanvasPeer() {} |
| |
| XCanvasPeer(XCreateWindowParams params) { |
| super(params); |
| } |
| |
| XCanvasPeer(Component target) { |
| super(target); |
| } |
| |
| void preInit(XCreateWindowParams params) { |
| super.preInit(params); |
| if (SunToolkit.getSunAwtNoerasebackground()) { |
| disableBackgroundErase(); |
| } |
| } |
| |
| /* Get a GraphicsConfig with the same visual on the new |
| * screen, which should be easy in Xinerama mode. |
| */ |
| public GraphicsConfiguration getAppropriateGraphicsConfiguration( |
| GraphicsConfiguration gc) |
| { |
| if (graphicsConfig == null || gc == null) { |
| return gc; |
| } |
| // Opt: Only need to do if we're not using the default GC |
| |
| int screenNum = ((X11GraphicsDevice)gc.getDevice()).getScreen(); |
| |
| X11GraphicsConfig parentgc; |
| // save vis id of current gc |
| int visual = graphicsConfig.getVisual(); |
| |
| X11GraphicsDevice newDev = (X11GraphicsDevice) GraphicsEnvironment. |
| getLocalGraphicsEnvironment(). |
| getScreenDevices()[screenNum]; |
| |
| for (int i = 0; i < newDev.getNumConfigs(screenNum); i++) { |
| if (visual == newDev.getConfigVisualId(i, screenNum)) { |
| // use that |
| graphicsConfig = (X11GraphicsConfig)newDev.getConfigurations()[i]; |
| break; |
| } |
| } |
| // just in case... |
| if (graphicsConfig == null) { |
| graphicsConfig = (X11GraphicsConfig) GraphicsEnvironment. |
| getLocalGraphicsEnvironment(). |
| getScreenDevices()[screenNum]. |
| getDefaultConfiguration(); |
| } |
| |
| return graphicsConfig; |
| } |
| |
| protected boolean shouldFocusOnClick() { |
| // Canvas should always be able to be focused by mouse clicks. |
| return true; |
| } |
| |
| public void disableBackgroundErase() { |
| eraseBackgroundDisabled = true; |
| } |
| protected boolean doEraseBackground() { |
| return !eraseBackgroundDisabled; |
| } |
| public void setBackground(Color c) { |
| boolean doRepaint = false; |
| if( getPeerBackground() == null || |
| !getPeerBackground().equals( c ) ) { |
| doRepaint = true; |
| } |
| super.setBackground(c); |
| if( doRepaint ) { |
| target.repaint(); |
| } |
| } |
| } |