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94 lines
4.2 KiB
Java
94 lines
4.2 KiB
Java
/*
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* Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package javax.swing;
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import java.awt.Component;
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import java.awt.Container;
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import java.awt.Rectangle;
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import java.awt.event.PaintEvent;
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import java.security.AccessController;
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import sun.awt.AppContext;
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import sun.awt.SunToolkit;
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import sun.awt.event.IgnorePaintEvent;
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import sun.security.action.GetBooleanAction;
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import sun.security.action.GetPropertyAction;
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/**
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* Swing's PaintEventDispatcher. If the component specified by the PaintEvent
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* is a top level Swing component (JFrame, JWindow, JDialog, JApplet), this
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* will forward the request to the RepaintManager for eventual painting.
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*
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*/
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class SwingPaintEventDispatcher extends sun.awt.PaintEventDispatcher {
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private static final boolean SHOW_FROM_DOUBLE_BUFFER;
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private static final boolean ERASE_BACKGROUND;
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static {
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SHOW_FROM_DOUBLE_BUFFER = "true".equals(AccessController.doPrivileged(
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new GetPropertyAction("swing.showFromDoubleBuffer", "true")));
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ERASE_BACKGROUND = AccessController.doPrivileged(
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new GetBooleanAction("swing.nativeErase"));
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}
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public PaintEvent createPaintEvent(Component component, int x, int y,
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int w, int h) {
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if (component instanceof RootPaneContainer) {
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AppContext appContext = SunToolkit.targetToAppContext(component);
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RepaintManager rm = RepaintManager.currentManager(appContext);
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if (!SHOW_FROM_DOUBLE_BUFFER ||
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!rm.show((Container)component, x, y, w, h)) {
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rm.nativeAddDirtyRegion(appContext, (Container)component,
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x, y, w, h);
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}
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// For backward compatibility generate an empty paint
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// event. Not doing this broke parts of Netbeans.
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return new IgnorePaintEvent(component, PaintEvent.PAINT,
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new Rectangle(x, y, w, h));
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}
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else if (component instanceof SwingHeavyWeight) {
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AppContext appContext = SunToolkit.targetToAppContext(component);
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RepaintManager rm = RepaintManager.currentManager(appContext);
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rm.nativeAddDirtyRegion(appContext, (Container)component,
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x, y, w, h);
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return new IgnorePaintEvent(component, PaintEvent.PAINT,
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new Rectangle(x, y, w, h));
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}
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return super.createPaintEvent(component, x, y, w, h);
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}
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public boolean shouldDoNativeBackgroundErase(Component c) {
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return ERASE_BACKGROUND || !(c instanceof RootPaneContainer);
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}
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public boolean queueSurfaceDataReplacing(Component c, Runnable r) {
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if (c instanceof RootPaneContainer) {
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AppContext appContext = SunToolkit.targetToAppContext(c);
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RepaintManager.currentManager(appContext).
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nativeQueueSurfaceDataRunnable(appContext, c, r);
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return true;
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}
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return super.queueSurfaceDataReplacing(c, r);
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}
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}
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