author | ant |
Wed, 15 May 2013 16:49:34 +0400 | |
changeset 17415 | 62b97a10da72 |
parent 16706 | 4b243017cd27 |
child 19026 | 96141cb8d7eb |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2013, 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 sun.swing; |
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import java.awt.BorderLayout; |
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import java.awt.Color; |
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import java.awt.Component; |
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import java.awt.Container; |
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import java.awt.EventQueue; |
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import java.awt.Graphics; |
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import java.awt.Graphics2D; |
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import java.awt.Rectangle; |
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import java.awt.image.BufferedImage; |
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import java.awt.image.DataBufferInt; |
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import java.security.AccessController; |
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import javax.swing.JLayeredPane; |
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import javax.swing.JPanel; |
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import javax.swing.JRootPane; |
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import javax.swing.LayoutFocusTraversalPolicy; |
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import javax.swing.RootPaneContainer; |
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import sun.awt.LightweightFrame; |
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import sun.security.action.GetPropertyAction; |
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/** |
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* The frame serves as a lightweight container which paints its content |
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* to an offscreen image and provides access to the image's data via the |
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* {@link LightweightContent} interface. Note, that it may not be shown |
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* as a standalone toplevel frame. Its purpose is to provide functionality |
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* for lightweight embedding. |
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* |
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* @author Artem Ananiev |
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* @author Anton Tarasov |
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*/ |
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public final class JLightweightFrame extends LightweightFrame implements RootPaneContainer { |
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private final JRootPane rootPane = new JRootPane(); |
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private LightweightContent content; |
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private Component component; |
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private JPanel contentPane; |
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private BufferedImage bbImage; |
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/** |
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* {@code copyBufferEnabled}, true by default, defines the following strategy. |
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* A duplicating (copy) buffer is created for the original pixel buffer. |
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* The copy buffer is synchronized with the original buffer every time the |
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* latter changes. {@code JLightweightFrame} passes the copy buffer array |
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* to the {@link LightweightContent#imageBufferReset} method. The code spot |
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* which synchronizes two buffers becomes the only critical section guarded |
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* by the lock (managed with the {@link LightweightContent#paintLock()}, |
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* {@link LightweightContent#paintUnlock()} methods). |
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*/ |
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private boolean copyBufferEnabled; |
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private int[] copyBuffer; |
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/** |
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* Constructs a new, initially invisible {@code JLightweightFrame} |
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* instance. |
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*/ |
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public JLightweightFrame() { |
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super(); |
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copyBufferEnabled = "true".equals(AccessController. |
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doPrivileged(new GetPropertyAction("jlf.copyBufferEnabled", "true"))); |
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add(rootPane, BorderLayout.CENTER); |
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setFocusTraversalPolicy(new LayoutFocusTraversalPolicy()); |
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if (getGraphicsConfiguration().isTranslucencyCapable()) { |
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setBackground(new Color(0, 0, 0, 0)); |
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} |
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} |
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/** |
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* Sets the {@link LightweightContent} instance for this frame. |
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* The {@code JComponent} object returned by the |
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* {@link LightweightContent#getComponent()} method is immediately |
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* added to the frame's content pane. |
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* |
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* @param content the {@link LightweightContent} instance |
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*/ |
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public void setContent(LightweightContent content) { |
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this.content = content; |
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this.component = content.getComponent(); |
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initInterior(); |
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} |
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@Override |
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public Graphics getGraphics() { |
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if (bbImage == null) return null; |
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Graphics2D g = bbImage.createGraphics(); |
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g.setBackground(getBackground()); |
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g.setColor(getForeground()); |
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g.setFont(getFont()); |
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return g; |
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} |
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/** |
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* {@inheritDoc} |
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* |
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* @see LightweightContent#focusGrabbed() |
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*/ |
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@Override |
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public void grabFocus() { |
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if (content != null) content.focusGrabbed(); |
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} |
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/** |
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* {@inheritDoc} |
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* |
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* @see LightweightContent#focusUngrabbed() |
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*/ |
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@Override |
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public void ungrabFocus() { |
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if (content != null) content.focusUngrabbed(); |
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} |
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private void syncCopyBuffer(boolean reset, int x, int y, int w, int h) { |
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content.paintLock(); |
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try { |
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int[] srcBuffer = ((DataBufferInt)bbImage.getRaster().getDataBuffer()).getData(); |
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if (reset) { |
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copyBuffer = new int[srcBuffer.length]; |
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} |
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int linestride = bbImage.getWidth(); |
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for (int i=0; i<h; i++) { |
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int from = (y + i) * linestride + x; |
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System.arraycopy(srcBuffer, from, copyBuffer, from, w); |
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} |
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} finally { |
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content.paintUnlock(); |
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} |
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} |
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private void initInterior() { |
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contentPane = new JPanel() { |
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@Override |
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public void paint(Graphics g) { |
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if (!copyBufferEnabled) { |
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content.paintLock(); |
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} |
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try { |
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super.paint(g); |
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final Rectangle clip = g.getClipBounds() != null ? |
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g.getClipBounds() : |
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new Rectangle(0, 0, contentPane.getWidth(), contentPane.getHeight()); |
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clip.x = Math.max(0, clip.x); |
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clip.y = Math.max(0, clip.y); |
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clip.width = Math.min(contentPane.getWidth(), clip.width); |
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clip.height = Math.min(contentPane.getHeight(), clip.height); |
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EventQueue.invokeLater(new Runnable() { |
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@Override |
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public void run() { |
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if (copyBufferEnabled) { |
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syncCopyBuffer(false, clip.x, clip.y, clip.width, clip.height); |
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} |
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content.imageUpdated(clip.x, clip.y, clip.width, clip.height); |
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} |
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}); |
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} finally { |
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if (!copyBufferEnabled) { |
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content.paintUnlock(); |
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} |
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} |
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} |
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@Override |
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protected boolean isPaintingOrigin() { |
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return true; |
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} |
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}; |
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contentPane.setLayout(new BorderLayout()); |
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contentPane.add(component); |
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setContentPane(contentPane); |
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} |
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@SuppressWarnings("deprecation") |
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@Override public void reshape(int x, int y, int width, int height) { |
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super.reshape(x, y, width, height); |
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if (width == 0 || height == 0) { |
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return; |
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} |
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if (!copyBufferEnabled) { |
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content.paintLock(); |
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} |
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try { |
218 |
if ((bbImage == null) || (width != bbImage.getWidth()) || (height != bbImage.getHeight())) { |
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boolean createBB = true; |
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int newW = width; |
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int newH = height; |
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if (bbImage != null) { |
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int oldW = bbImage.getWidth(); |
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int oldH = bbImage.getHeight(); |
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225 |
if ((oldW >= newW) && (oldH >= newH)) { |
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createBB = false; |
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} else { |
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if (oldW >= newW) { |
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newW = oldW; |
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} else { |
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newW = Math.max((int)(oldW * 1.2), width); |
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} |
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if (oldH >= newH) { |
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newH = oldH; |
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} else { |
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newH = Math.max((int)(oldH * 1.2), height); |
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} |
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} |
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239 |
} |
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if (createBB) { |
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BufferedImage oldBB = bbImage; |
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bbImage = new BufferedImage(newW, newH, BufferedImage.TYPE_INT_ARGB_PRE); |
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if (oldBB != null) { |
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Graphics g = bbImage.getGraphics(); |
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try { |
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g.drawImage(oldBB, 0, 0, newW, newH, null); |
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} finally { |
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g.dispose(); |
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oldBB.flush(); |
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} |
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} |
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int[] pixels = ((DataBufferInt)bbImage.getRaster().getDataBuffer()).getData(); |
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if (copyBufferEnabled) { |
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syncCopyBuffer(true, 0, 0, width, height); |
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pixels = copyBuffer; |
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} |
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content.imageBufferReset(pixels, 0, 0, width, height, bbImage.getWidth()); |
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return; |
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} |
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} |
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content.imageReshaped(0, 0, width, height); |
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} finally { |
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if (!copyBufferEnabled) { |
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content.paintUnlock(); |
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} |
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} |
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} |
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@Override |
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271 |
public JRootPane getRootPane() { |
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272 |
return rootPane; |
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273 |
} |
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274 |
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275 |
@Override |
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276 |
public void setContentPane(Container contentPane) { |
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277 |
getRootPane().setContentPane(contentPane); |
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278 |
} |
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279 |
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280 |
@Override |
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281 |
public Container getContentPane() { |
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282 |
return getRootPane().getContentPane(); |
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283 |
} |
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284 |
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285 |
@Override |
|
286 |
public void setLayeredPane(JLayeredPane layeredPane) { |
|
287 |
getRootPane().setLayeredPane(layeredPane); |
|
288 |
} |
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289 |
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290 |
@Override |
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291 |
public JLayeredPane getLayeredPane() { |
|
292 |
return getRootPane().getLayeredPane(); |
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293 |
} |
|
294 |
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295 |
@Override |
|
296 |
public void setGlassPane(Component glassPane) { |
|
297 |
getRootPane().setGlassPane(glassPane); |
|
298 |
} |
|
299 |
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300 |
@Override |
|
301 |
public Component getGlassPane() { |
|
302 |
return getRootPane().getGlassPane(); |
|
303 |
} |
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304 |
} |