author | peterz |
Fri, 25 Dec 2009 17:47:08 +0300 | |
changeset 4842 | c9f791782a29 |
parent 3975 | 097245f7db08 |
child 5451 | 82e4cf75e5b4 |
permissions | -rw-r--r-- |
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/* |
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* Copyright 2009 Sun Microsystems, Inc. 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. Sun designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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* CA 95054 USA or visit www.sun.com if you need additional information or |
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* have any questions. |
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*/ |
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package javax.swing; |
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import javax.swing.plaf.LayerUI; |
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import java.awt.*; |
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import java.awt.event.*; |
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import java.beans.PropertyChangeEvent; |
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import java.beans.PropertyChangeListener; |
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import java.io.IOException; |
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import java.io.ObjectInputStream; |
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import java.io.Serializable; |
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import java.lang.ref.WeakReference; |
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import java.util.ArrayList; |
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import java.util.Iterator; |
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import java.security.AccessController; |
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import java.security.PrivilegedAction; |
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/** |
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* {@code JLayer} is a universal decorator for Swing components |
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* which enables you to implement various advanced painting effects as well as |
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* receive notifications of all {@code AWTEvent}s generated within its borders. |
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* <p/> |
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* {@code JLayer} delegates the handling of painting and input events to a |
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* {@link javax.swing.plaf.LayerUI} object, which performs the actual decoration. |
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* <p/> |
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* The custom painting implemented in the {@code LayerUI} and events notification |
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* work for the JLayer itself and all its subcomponents. |
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* This combination enables you to enrich existing components |
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* by adding new advanced functionality such as temporary locking of a hierarchy, |
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* data tips for compound components, enhanced mouse scrolling etc and so on. |
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* <p/> |
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* {@code JLayer} is a good solution if you only need to do custom painting |
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* over compound component or catch input events from its subcomponents. |
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* <pre> |
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* import javax.swing.*; |
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* import javax.swing.plaf.LayerUI; |
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* import java.awt.*; |
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* |
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* public class JLayerSample { |
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* |
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* private static JLayer<JComponent> createLayer() { |
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* // This custom layerUI will fill the layer with translucent green |
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* // and print out all mouseMotion events generated within its borders |
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* LayerUI<JComponent> layerUI = new LayerUI<JComponent>() { |
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* |
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* public void paint(Graphics g, JComponent c) { |
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* // paint the layer as is |
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* super.paint(g, c); |
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* // fill it with the translucent green |
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* g.setColor(new Color(0, 128, 0, 128)); |
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* g.fillRect(0, 0, c.getWidth(), c.getHeight()); |
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* } |
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* |
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* public void installUI(JComponent c) { |
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* super.installUI(c); |
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* // enable mouse motion events for the layer's subcomponents |
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* ((JLayer) c).setLayerEventMask(AWTEvent.MOUSE_MOTION_EVENT_MASK); |
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* } |
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* |
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* public void uninstallUI(JComponent c) { |
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* super.uninstallUI(c); |
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* // reset the layer event mask |
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* ((JLayer) c).setLayerEventMask(0); |
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* } |
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* |
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* // overridden method which catches MouseMotion events |
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* public void eventDispatched(AWTEvent e, JLayer<? extends JComponent> l) { |
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* System.out.println("AWTEvent detected: " + e); |
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* } |
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* }; |
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* // create a component to be decorated with the layer |
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* JPanel panel = new JPanel(); |
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* panel.add(new JButton("JButton")); |
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* |
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* // create the layer for the panel using our custom layerUI |
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* return new JLayer<JComponent>(panel, layerUI); |
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* } |
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* |
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* private static void createAndShowGUI() { |
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* final JFrame frame = new JFrame(); |
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* frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); |
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* |
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* // work with the layer as with any other Swing component |
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* frame.add(createLayer()); |
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* |
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* frame.setSize(200, 200); |
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* frame.setLocationRelativeTo(null); |
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* frame.setVisible(true); |
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* } |
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* |
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* public static void main(String[] args) throws Exception { |
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* SwingUtilities.invokeAndWait(new Runnable() { |
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* public void run() { |
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* createAndShowGUI(); |
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* } |
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* }); |
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* } |
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* } |
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* </pre> |
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* |
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* <b>Note:</b> {@code JLayer} doesn't support the following methods: |
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* <ul> |
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* <li>{@link Container#add(java.awt.Component)}</li> |
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* <li>{@link Container#add(String, java.awt.Component)}</li> |
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* <li>{@link Container#add(java.awt.Component, int)}</li> |
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* <li>{@link Container#add(java.awt.Component, Object)}</li> |
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* <li>{@link Container#add(java.awt.Component, Object, int)}</li> |
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* </ul> |
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* using any of of them will cause {@code UnsupportedOperationException} to be thrown, |
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* to add a component to {@code JLayer} |
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* use {@link #setView(Component)} or {@link #setGlassPane(JPanel)}. |
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* |
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* @param <V> the type of {@code JLayer}'s view component |
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* |
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* @see #JLayer(Component) |
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* @see #setView(Component) |
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* @see #getView() |
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* @see javax.swing.plaf.LayerUI |
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* @see #JLayer(Component, LayerUI) |
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* @see #setUI(javax.swing.plaf.LayerUI) |
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* @see #getUI() |
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* @since 1.7 |
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* |
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* @author Alexander Potochkin |
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*/ |
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public final class JLayer<V extends Component> |
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extends JComponent |
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implements Scrollable, PropertyChangeListener { |
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private V view; |
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// this field is necessary because JComponent.ui is transient |
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// when layerUI is serializable |
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private LayerUI<? super V> layerUI; |
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private JPanel glassPane; |
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private boolean isPainting; |
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private static final DefaultLayerLayout sharedLayoutInstance = |
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new DefaultLayerLayout(); |
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private long eventMask; |
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private static final LayerEventController eventController = |
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new LayerEventController(); |
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private static final long ACCEPTED_EVENTS = |
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AWTEvent.COMPONENT_EVENT_MASK | |
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AWTEvent.CONTAINER_EVENT_MASK | |
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AWTEvent.FOCUS_EVENT_MASK | |
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AWTEvent.KEY_EVENT_MASK | |
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AWTEvent.MOUSE_WHEEL_EVENT_MASK | |
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AWTEvent.MOUSE_MOTION_EVENT_MASK | |
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AWTEvent.MOUSE_EVENT_MASK | |
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AWTEvent.INPUT_METHOD_EVENT_MASK | |
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AWTEvent.HIERARCHY_EVENT_MASK | |
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AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK; |
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/** |
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* Creates a new {@code JLayer} object with a {@code null} view component |
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* and {@code null} {@link javax.swing.plaf.LayerUI}. |
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* |
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* @see #setView |
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* @see #setUI |
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*/ |
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public JLayer() { |
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this(null); |
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} |
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/** |
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* Creates a new {@code JLayer} object |
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* with {@code null} {@link javax.swing.plaf.LayerUI}. |
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* |
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* @param view the component to be decorated by this {@code JLayer} |
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* |
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* @see #setUI |
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*/ |
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public JLayer(V view) { |
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this(view, null); |
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} |
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/** |
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* Creates a new {@code JLayer} object with the specified view component |
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* and {@link javax.swing.plaf.LayerUI} object. |
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* |
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* @param view the component to be decorated |
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* @param ui the {@link javax.swing.plaf.LayerUI} delegate |
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* to be used by this {@code JLayer} |
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*/ |
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public JLayer(V view, LayerUI<V> ui) { |
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setLayout(sharedLayoutInstance); |
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setGlassPane(createGlassPane()); |
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setView(view); |
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setUI(ui); |
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} |
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/** |
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* Returns the {@code JLayer}'s view component or {@code null}. |
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* <br/>This is a bound property. |
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* |
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* @return the {@code JLayer}'s view component |
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* or {@code null} if none exists |
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* |
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* @see #setView(Component) |
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*/ |
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public V getView() { |
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return view; |
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} |
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/** |
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* Sets the {@code JLayer}'s view component, which can be {@code null}. |
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* <br/>This is a bound property. |
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* |
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* @param view the view component for this {@code JLayer} |
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* |
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* @see #getView() |
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*/ |
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public void setView(V view) { |
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Component oldView = getView(); |
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if (oldView != null) { |
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super.remove(oldView); |
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} |
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if (view != null) { |
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super.addImpl(view, null, getComponentCount()); |
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} |
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this.view = view; |
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firePropertyChange("view", oldView, view); |
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revalidate(); |
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repaint(); |
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} |
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/** |
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* Sets the {@link javax.swing.plaf.LayerUI} which will perform painting |
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* and receive input events for this {@code JLayer}. |
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* |
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* @param ui the {@link javax.swing.plaf.LayerUI} for this {@code JLayer} |
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*/ |
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public void setUI(LayerUI<? super V> ui) { |
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this.layerUI = ui; |
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super.setUI(ui); |
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} |
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/** |
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* Returns the {@link javax.swing.plaf.LayerUI} for this {@code JLayer}. |
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* |
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* @return the {@code LayerUI} for this {@code JLayer} |
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*/ |
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public LayerUI<? super V> getUI() { |
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return layerUI; |
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} |
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/** |
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* Returns the {@code JLayer}'s glassPane component or {@code null}. |
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* <br/>This is a bound property. |
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* |
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* @return the {@code JLayer}'s glassPane component |
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* or {@code null} if none exists |
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* |
|
278 |
* @see #setGlassPane(JPanel) |
|
279 |
*/ |
|
280 |
public JPanel getGlassPane() { |
|
281 |
return glassPane; |
|
282 |
} |
|
283 |
||
284 |
/** |
|
285 |
* Sets the {@code JLayer}'s glassPane component, which can be {@code null}. |
|
286 |
* <br/>This is a bound property. |
|
287 |
* |
|
288 |
* @param glassPane the glassPane component of this {@code JLayer} |
|
289 |
* |
|
290 |
* @see #getGlassPane() |
|
291 |
*/ |
|
292 |
public void setGlassPane(JPanel glassPane) { |
|
293 |
Component oldGlassPane = getGlassPane(); |
|
294 |
if (oldGlassPane != null) { |
|
295 |
super.remove(oldGlassPane); |
|
296 |
} |
|
297 |
if (glassPane != null) { |
|
298 |
super.addImpl(glassPane, null, 0); |
|
299 |
} |
|
300 |
this.glassPane = glassPane; |
|
301 |
firePropertyChange("glassPane", oldGlassPane, glassPane); |
|
302 |
revalidate(); |
|
303 |
repaint(); |
|
304 |
} |
|
305 |
||
306 |
/** |
|
307 |
* Called by the constructor methods to create a default {@code glassPane}. |
|
308 |
* By default this method creates a new JPanel with visibility set to true |
|
309 |
* and opacity set to false. |
|
310 |
* |
|
311 |
* @return the default {@code glassPane} |
|
312 |
*/ |
|
313 |
public JPanel createGlassPane() { |
|
314 |
return new DefaultLayerGlassPane(); |
|
315 |
} |
|
316 |
||
317 |
/** |
|
318 |
* This method is not supported by {@code JLayer} |
|
319 |
* and always throws {@code UnsupportedOperationException} |
|
320 |
* |
|
321 |
* @throws UnsupportedOperationException this method is not supported |
|
322 |
* |
|
323 |
* @see #setView(Component) |
|
3748
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|
324 |
* @see #setGlassPane(JPanel) |
3508 | 325 |
*/ |
326 |
protected void addImpl(Component comp, Object constraints, int index) { |
|
327 |
throw new UnsupportedOperationException( |
|
328 |
"Adding components to JLayer is not supported, " + |
|
329 |
"use setView() or setGlassPane() instead"); |
|
330 |
} |
|
331 |
||
332 |
/** |
|
333 |
* {@inheritDoc} |
|
334 |
*/ |
|
335 |
public void remove(Component comp) { |
|
3975
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|
336 |
if (comp == null) { |
097245f7db08
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diff
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|
337 |
super.remove(comp); |
097245f7db08
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|
338 |
} else if (comp == getView()) { |
3508 | 339 |
setView(null); |
340 |
} else if (comp == getGlassPane()) { |
|
341 |
setGlassPane(null); |
|
342 |
} else { |
|
343 |
super.remove(comp); |
|
344 |
} |
|
345 |
} |
|
346 |
||
347 |
/** |
|
348 |
* {@inheritDoc} |
|
349 |
*/ |
|
350 |
public void removeAll() { |
|
351 |
setView(null); |
|
352 |
setGlassPane(null); |
|
353 |
} |
|
354 |
||
355 |
/** |
|
356 |
* Delegates all painting to the {@link javax.swing.plaf.LayerUI} object. |
|
357 |
* |
|
358 |
* @param g the {@code Graphics} to render to |
|
359 |
*/ |
|
360 |
public void paint(Graphics g) { |
|
361 |
if (!isPainting) { |
|
362 |
isPainting = true; |
|
363 |
super.paintComponent(g); |
|
364 |
isPainting = false; |
|
365 |
} else { |
|
366 |
super.paint(g); |
|
367 |
} |
|
368 |
} |
|
369 |
||
370 |
/** |
|
371 |
* This method is empty, because all painting is done by |
|
372 |
* {@link #paint(Graphics)} and |
|
373 |
* {@link javax.swing.plaf.LayerUI#update(Graphics, JComponent)} methods |
|
374 |
*/ |
|
375 |
protected void paintComponent(Graphics g) { |
|
376 |
} |
|
377 |
||
378 |
/** |
|
379 |
* To enable the correct painting of the {@code glassPane} and view component, |
|
380 |
* the {@code JLayer} overrides the default implementation of |
|
381 |
* this method to return {@code false} when the {@code glassPane} is visible. |
|
382 |
* |
|
383 |
* @return false if {@code JLayer}'s {@code glassPane} is visible |
|
384 |
*/ |
|
385 |
public boolean isOptimizedDrawingEnabled() { |
|
3748
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3743
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|
386 |
return glassPane == null || !glassPane.isVisible(); |
3508 | 387 |
} |
388 |
||
389 |
/** |
|
390 |
* {@inheritDoc} |
|
391 |
*/ |
|
392 |
public void propertyChange(PropertyChangeEvent evt) { |
|
393 |
if (getUI() != null) { |
|
394 |
getUI().applyPropertyChange(evt, this); |
|
395 |
} |
|
396 |
} |
|
397 |
||
398 |
/** |
|
399 |
* Sets the bitmask of event types to receive by this {@code JLayer}. |
|
400 |
* Here is the list of the supported event types: |
|
401 |
* <ul> |
|
402 |
* <li>AWTEvent.COMPONENT_EVENT_MASK</li> |
|
403 |
* <li>AWTEvent.CONTAINER_EVENT_MASK</li> |
|
404 |
* <li>AWTEvent.FOCUS_EVENT_MASK</li> |
|
405 |
* <li>AWTEvent.KEY_EVENT_MASK</li> |
|
406 |
* <li>AWTEvent.MOUSE_WHEEL_EVENT_MASK</li> |
|
407 |
* <li>AWTEvent.MOUSE_MOTION_EVENT_MASK</li> |
|
408 |
* <li>AWTEvent.MOUSE_EVENT_MASK</li> |
|
409 |
* <li>AWTEvent.INPUT_METHOD_EVENT_MASK</li> |
|
410 |
* <li>AWTEvent.HIERARCHY_EVENT_MASK</li> |
|
411 |
* <li>AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK</li> |
|
412 |
* </ul> |
|
413 |
* <p/> |
|
414 |
* If {@code LayerUI} is installed, |
|
415 |
* {@link javax.swing.plaf.LayerUI#eventDispatched(AWTEvent, JLayer)} method |
|
416 |
* will only receive events that match the event mask. |
|
417 |
* <p/> |
|
418 |
* The following example shows how to correclty use this method |
|
419 |
* in the {@code LayerUI} implementations: |
|
420 |
* <pre> |
|
421 |
* public void installUI(JComponent c) { |
|
422 |
* super.installUI(c); |
|
423 |
* JLayer l = (JLayer) c; |
|
424 |
* // this LayerUI will receive only key and focus events |
|
425 |
* l.setLayerEventMask(AWTEvent.KEY_EVENT_MASK | AWTEvent.FOCUS_EVENT_MASK); |
|
426 |
* } |
|
427 |
* |
|
428 |
* public void uninstallUI(JComponent c) { |
|
429 |
* super.uninstallUI(c); |
|
430 |
* JLayer l = (JLayer) c; |
|
431 |
* // JLayer must be returned to its initial state |
|
432 |
* l.setLayerEventMask(0); |
|
433 |
* } |
|
434 |
* </pre> |
|
435 |
* |
|
436 |
* By default {@code JLayer} receives no events. |
|
437 |
* |
|
438 |
* @param layerEventMask the bitmask of event types to receive |
|
439 |
* |
|
440 |
* @throws IllegalArgumentException if the {@code layerEventMask} parameter |
|
441 |
* contains unsupported event types |
|
442 |
* @see #getLayerEventMask() |
|
443 |
*/ |
|
444 |
public void setLayerEventMask(long layerEventMask) { |
|
445 |
if (layerEventMask != (layerEventMask & ACCEPTED_EVENTS)) { |
|
446 |
throw new IllegalArgumentException( |
|
447 |
"The event bitmask contains unsupported event types"); |
|
448 |
} |
|
449 |
long oldEventMask = getLayerEventMask(); |
|
450 |
this.eventMask = layerEventMask; |
|
451 |
firePropertyChange("layerEventMask", oldEventMask, layerEventMask); |
|
452 |
if (layerEventMask != oldEventMask) { |
|
453 |
disableEvents(oldEventMask); |
|
454 |
enableEvents(eventMask); |
|
3743 | 455 |
if (isDisplayable()) { |
456 |
eventController.updateAWTEventListener( |
|
457 |
oldEventMask, layerEventMask); |
|
458 |
} |
|
3508 | 459 |
} |
460 |
} |
|
461 |
||
462 |
/** |
|
463 |
* Returns the bitmap of event mask to receive by this {@code JLayer} |
|
464 |
* and its {@code LayerUI}. |
|
465 |
* <p/> |
|
466 |
* It means that {@link javax.swing.plaf.LayerUI#eventDispatched(AWTEvent, JLayer)} method |
|
467 |
* will only receive events that match the event mask. |
|
468 |
* <p/> |
|
469 |
* By default {@code JLayer} receives no events. |
|
470 |
* |
|
471 |
* @return the bitmask of event types to receive for this {@code JLayer} |
|
472 |
*/ |
|
473 |
public long getLayerEventMask() { |
|
474 |
return eventMask; |
|
475 |
} |
|
476 |
||
477 |
/** |
|
478 |
* Delegates its functionality to the {@link javax.swing.plaf.LayerUI#updateUI(JLayer)} method, |
|
479 |
* if {@code LayerUI} is set. |
|
480 |
*/ |
|
481 |
public void updateUI() { |
|
482 |
if (getUI() != null) { |
|
483 |
getUI().updateUI(this); |
|
484 |
} |
|
485 |
} |
|
486 |
||
487 |
/** |
|
488 |
* Returns the preferred size of the viewport for a view component. |
|
489 |
* <p/> |
|
490 |
* If the ui delegate of this layer is not {@code null}, this method delegates its |
|
491 |
* implementation to the {@code LayerUI.getPreferredScrollableViewportSize(JLayer)} |
|
492 |
* |
|
493 |
* @return the preferred size of the viewport for a view component |
|
494 |
* |
|
495 |
* @see Scrollable |
|
496 |
* @see LayerUI#getPreferredScrollableViewportSize(JLayer) |
|
497 |
*/ |
|
498 |
public Dimension getPreferredScrollableViewportSize() { |
|
499 |
if (getUI() != null) { |
|
500 |
return getUI().getPreferredScrollableViewportSize(this); |
|
501 |
} |
|
502 |
return getPreferredSize(); |
|
503 |
} |
|
504 |
||
505 |
/** |
|
506 |
* Returns a scroll increment, which is required for components |
|
507 |
* that display logical rows or columns in order to completely expose |
|
508 |
* one block of rows or columns, depending on the value of orientation. |
|
509 |
* <p/> |
|
510 |
* If the ui delegate of this layer is not {@code null}, this method delegates its |
|
511 |
* implementation to the {@code LayerUI.getScrollableBlockIncrement(JLayer,Rectangle,int,int)} |
|
512 |
* |
|
513 |
* @return the "block" increment for scrolling in the specified direction |
|
514 |
* |
|
515 |
* @see Scrollable |
|
516 |
* @see LayerUI#getScrollableBlockIncrement(JLayer, Rectangle, int, int) |
|
517 |
*/ |
|
518 |
public int getScrollableBlockIncrement(Rectangle visibleRect, |
|
519 |
int orientation, int direction) { |
|
520 |
if (getUI() != null) { |
|
521 |
return getUI().getScrollableBlockIncrement(this, visibleRect, |
|
522 |
orientation, direction); |
|
523 |
} |
|
524 |
return (orientation == SwingConstants.VERTICAL) ? visibleRect.height : |
|
525 |
visibleRect.width; |
|
526 |
} |
|
527 |
||
528 |
/** |
|
529 |
* Returns {@code false} to indicate that the height of the viewport does not |
|
530 |
* determine the height of the layer, unless the preferred height |
|
531 |
* of the layer is smaller than the height of the viewport. |
|
532 |
* <p/> |
|
533 |
* If the ui delegate of this layer is not null, this method delegates its |
|
534 |
* implementation to the {@code LayerUI.getScrollableTracksViewportHeight(JLayer)} |
|
535 |
* |
|
536 |
* @return whether the layer should track the height of the viewport |
|
537 |
* |
|
538 |
* @see Scrollable |
|
539 |
* @see LayerUI#getScrollableTracksViewportHeight(JLayer) |
|
540 |
*/ |
|
541 |
public boolean getScrollableTracksViewportHeight() { |
|
542 |
if (getUI() != null) { |
|
543 |
return getUI().getScrollableTracksViewportHeight(this); |
|
544 |
} |
|
545 |
return false; |
|
546 |
} |
|
547 |
||
548 |
/** |
|
549 |
* Returns {@code false} to indicate that the width of the viewport does not |
|
550 |
* determine the width of the layer, unless the preferred width |
|
551 |
* of the layer is smaller than the width of the viewport. |
|
552 |
* <p/> |
|
553 |
* If the ui delegate of this layer is not null, this method delegates its |
|
554 |
* implementation to the {@code LayerUI.getScrollableTracksViewportWidth(JLayer)} |
|
555 |
* |
|
556 |
* @return whether the layer should track the width of the viewport |
|
557 |
* |
|
558 |
* @see Scrollable |
|
559 |
* @see LayerUI#getScrollableTracksViewportWidth(JLayer) |
|
560 |
*/ |
|
561 |
public boolean getScrollableTracksViewportWidth() { |
|
562 |
if (getUI() != null) { |
|
563 |
return getUI().getScrollableTracksViewportWidth(this); |
|
564 |
} |
|
565 |
return false; |
|
566 |
} |
|
567 |
||
568 |
/** |
|
569 |
* Returns a scroll increment, which is required for components |
|
570 |
* that display logical rows or columns in order to completely expose |
|
571 |
* one new row or column, depending on the value of orientation. |
|
572 |
* Ideally, components should handle a partially exposed row or column |
|
573 |
* by returning the distance required to completely expose the item. |
|
574 |
* <p/> |
|
575 |
* Scrolling containers, like {@code JScrollPane}, will use this method |
|
576 |
* each time the user requests a unit scroll. |
|
577 |
* <p/> |
|
578 |
* If the ui delegate of this layer is not {@code null}, this method delegates its |
|
579 |
* implementation to the {@code LayerUI.getScrollableUnitIncrement(JLayer,Rectangle,int,int)} |
|
580 |
* |
|
581 |
* @return The "unit" increment for scrolling in the specified direction. |
|
582 |
* This value should always be positive. |
|
583 |
* |
|
584 |
* @see Scrollable |
|
585 |
* @see LayerUI#getScrollableUnitIncrement(JLayer, Rectangle, int, int) |
|
586 |
*/ |
|
587 |
public int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, |
|
588 |
int direction) { |
|
589 |
if (getUI() != null) { |
|
590 |
return getUI().getScrollableUnitIncrement( |
|
591 |
this, visibleRect, orientation, direction); |
|
592 |
} |
|
593 |
return 1; |
|
594 |
} |
|
595 |
||
596 |
private void readObject(ObjectInputStream s) |
|
597 |
throws IOException, ClassNotFoundException { |
|
598 |
s.defaultReadObject(); |
|
3743 | 599 |
if (layerUI != null) { |
600 |
setUI(layerUI); |
|
601 |
} |
|
602 |
if (eventMask != 0) { |
|
603 |
eventController.updateAWTEventListener(0, eventMask); |
|
3508 | 604 |
} |
3743 | 605 |
} |
606 |
||
3748
b88af44d77a8
6875153: JLayer.isOptimizedDrawingEnabled() throws NPE for null glass pane set
alexp
parents:
3743
diff
changeset
|
607 |
/** |
b88af44d77a8
6875153: JLayer.isOptimizedDrawingEnabled() throws NPE for null glass pane set
alexp
parents:
3743
diff
changeset
|
608 |
* {@inheritDoc} |
b88af44d77a8
6875153: JLayer.isOptimizedDrawingEnabled() throws NPE for null glass pane set
alexp
parents:
3743
diff
changeset
|
609 |
*/ |
3743 | 610 |
public void addNotify() { |
3748
b88af44d77a8
6875153: JLayer.isOptimizedDrawingEnabled() throws NPE for null glass pane set
alexp
parents:
3743
diff
changeset
|
611 |
super.addNotify(); |
3743 | 612 |
eventController.updateAWTEventListener(0, eventMask); |
613 |
} |
|
614 |
||
3748
b88af44d77a8
6875153: JLayer.isOptimizedDrawingEnabled() throws NPE for null glass pane set
alexp
parents:
3743
diff
changeset
|
615 |
/** |
b88af44d77a8
6875153: JLayer.isOptimizedDrawingEnabled() throws NPE for null glass pane set
alexp
parents:
3743
diff
changeset
|
616 |
* {@inheritDoc} |
b88af44d77a8
6875153: JLayer.isOptimizedDrawingEnabled() throws NPE for null glass pane set
alexp
parents:
3743
diff
changeset
|
617 |
*/ |
3743 | 618 |
public void removeNotify() { |
3748
b88af44d77a8
6875153: JLayer.isOptimizedDrawingEnabled() throws NPE for null glass pane set
alexp
parents:
3743
diff
changeset
|
619 |
super.removeNotify(); |
3743 | 620 |
eventController.updateAWTEventListener(eventMask, 0); |
3508 | 621 |
} |
622 |
||
623 |
/** |
|
624 |
* static AWTEventListener to be shared with all AbstractLayerUIs |
|
625 |
*/ |
|
626 |
private static class LayerEventController implements AWTEventListener { |
|
3743 | 627 |
private ArrayList<Long> layerMaskList = |
628 |
new ArrayList<Long>(); |
|
3508 | 629 |
|
630 |
private long currentEventMask; |
|
631 |
||
632 |
@SuppressWarnings("unchecked") |
|
633 |
public void eventDispatched(AWTEvent event) { |
|
634 |
Object source = event.getSource(); |
|
635 |
if (source instanceof Component) { |
|
636 |
Component component = (Component) source; |
|
637 |
while (component != null) { |
|
638 |
if (component instanceof JLayer) { |
|
639 |
JLayer l = (JLayer) component; |
|
640 |
LayerUI ui = l.getUI(); |
|
641 |
if (ui != null && |
|
642 |
isEventEnabled(l.getLayerEventMask(), |
|
643 |
event.getID())) { |
|
644 |
ui.eventDispatched(event, l); |
|
645 |
} |
|
646 |
} |
|
647 |
component = component.getParent(); |
|
648 |
} |
|
649 |
} |
|
650 |
} |
|
651 |
||
3743 | 652 |
private void updateAWTEventListener(long oldEventMask, long newEventMask) { |
653 |
if (oldEventMask != 0) { |
|
654 |
layerMaskList.remove(oldEventMask); |
|
3508 | 655 |
} |
3743 | 656 |
if (newEventMask != 0) { |
657 |
layerMaskList.add(newEventMask); |
|
3508 | 658 |
} |
659 |
long combinedMask = 0; |
|
3743 | 660 |
for (Long mask : layerMaskList) { |
661 |
combinedMask |= mask; |
|
3508 | 662 |
} |
663 |
if (combinedMask == 0) { |
|
664 |
removeAWTEventListener(); |
|
665 |
} else if (getCurrentEventMask() != combinedMask) { |
|
666 |
removeAWTEventListener(); |
|
667 |
addAWTEventListener(combinedMask); |
|
668 |
} |
|
3743 | 669 |
currentEventMask = combinedMask; |
3508 | 670 |
} |
671 |
||
672 |
private long getCurrentEventMask() { |
|
673 |
return currentEventMask; |
|
674 |
} |
|
675 |
||
676 |
private void addAWTEventListener(final long eventMask) { |
|
677 |
AccessController.doPrivileged(new PrivilegedAction<Void>() { |
|
678 |
public Void run() { |
|
679 |
Toolkit.getDefaultToolkit(). |
|
680 |
addAWTEventListener(LayerEventController.this, eventMask); |
|
681 |
return null; |
|
682 |
} |
|
683 |
}); |
|
3743 | 684 |
|
3508 | 685 |
} |
686 |
||
687 |
private void removeAWTEventListener() { |
|
688 |
AccessController.doPrivileged(new PrivilegedAction<Void>() { |
|
689 |
public Void run() { |
|
690 |
Toolkit.getDefaultToolkit(). |
|
691 |
removeAWTEventListener(LayerEventController.this); |
|
692 |
return null; |
|
693 |
} |
|
694 |
}); |
|
695 |
} |
|
696 |
||
697 |
private boolean isEventEnabled(long eventMask, int id) { |
|
698 |
return (((eventMask & AWTEvent.COMPONENT_EVENT_MASK) != 0 && |
|
699 |
id >= ComponentEvent.COMPONENT_FIRST && |
|
700 |
id <= ComponentEvent.COMPONENT_LAST) |
|
701 |
|| ((eventMask & AWTEvent.CONTAINER_EVENT_MASK) != 0 && |
|
702 |
id >= ContainerEvent.CONTAINER_FIRST && |
|
703 |
id <= ContainerEvent.CONTAINER_LAST) |
|
704 |
|| ((eventMask & AWTEvent.FOCUS_EVENT_MASK) != 0 && |
|
705 |
id >= FocusEvent.FOCUS_FIRST && |
|
706 |
id <= FocusEvent.FOCUS_LAST) |
|
707 |
|| ((eventMask & AWTEvent.KEY_EVENT_MASK) != 0 && |
|
708 |
id >= KeyEvent.KEY_FIRST && |
|
709 |
id <= KeyEvent.KEY_LAST) |
|
710 |
|| ((eventMask & AWTEvent.MOUSE_WHEEL_EVENT_MASK) != 0 && |
|
711 |
id == MouseEvent.MOUSE_WHEEL) |
|
712 |
|| ((eventMask & AWTEvent.MOUSE_MOTION_EVENT_MASK) != 0 && |
|
713 |
(id == MouseEvent.MOUSE_MOVED || |
|
714 |
id == MouseEvent.MOUSE_DRAGGED)) |
|
715 |
|| ((eventMask & AWTEvent.MOUSE_EVENT_MASK) != 0 && |
|
716 |
id != MouseEvent.MOUSE_MOVED && |
|
717 |
id != MouseEvent.MOUSE_DRAGGED && |
|
718 |
id != MouseEvent.MOUSE_WHEEL && |
|
719 |
id >= MouseEvent.MOUSE_FIRST && |
|
720 |
id <= MouseEvent.MOUSE_LAST) |
|
721 |
|| ((eventMask & AWTEvent.INPUT_METHOD_EVENT_MASK) != 0 && |
|
722 |
id >= InputMethodEvent.INPUT_METHOD_FIRST && |
|
723 |
id <= InputMethodEvent.INPUT_METHOD_LAST) |
|
724 |
|| ((eventMask & AWTEvent.HIERARCHY_EVENT_MASK) != 0 && |
|
725 |
id == HierarchyEvent.HIERARCHY_CHANGED) |
|
726 |
|| ((eventMask & AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK) != 0 && |
|
727 |
(id == HierarchyEvent.ANCESTOR_MOVED || |
|
728 |
id == HierarchyEvent.ANCESTOR_RESIZED))); |
|
729 |
} |
|
730 |
} |
|
731 |
||
732 |
/** |
|
733 |
* The default glassPane for the {@link javax.swing.JLayer}. |
|
734 |
* It is a subclass of {@code JPanel} which is non opaque by default. |
|
735 |
*/ |
|
736 |
private static class DefaultLayerGlassPane extends JPanel { |
|
737 |
/** |
|
738 |
* Creates a new {@link DefaultLayerGlassPane} |
|
739 |
*/ |
|
740 |
public DefaultLayerGlassPane() { |
|
741 |
setOpaque(false); |
|
742 |
} |
|
743 |
||
744 |
/** |
|
745 |
* First, implementatation of this method iterates through |
|
746 |
* glassPane's child components and returns {@code true} |
|
747 |
* if any of them is visible and contains passed x,y point. |
|
748 |
* After that it checks if no mouseListeners is attached to this component |
|
749 |
* and no mouse cursor is set, then it returns {@code false}, |
|
750 |
* otherwise calls the super implementation of this method. |
|
751 |
* |
|
752 |
* @param x the <i>x</i> coordinate of the point |
|
753 |
* @param y the <i>y</i> coordinate of the point |
|
754 |
* @return true if this component logically contains x,y |
|
755 |
*/ |
|
756 |
public boolean contains(int x, int y) { |
|
757 |
for (int i = 0; i < getComponentCount(); i++) { |
|
758 |
Component c = getComponent(i); |
|
759 |
Point point = SwingUtilities.convertPoint(this, new Point(x, y), c); |
|
760 |
if(c.isVisible() && c.contains(point)){ |
|
761 |
return true; |
|
762 |
} |
|
763 |
} |
|
764 |
if (getMouseListeners().length == 0 |
|
765 |
&& getMouseMotionListeners().length == 0 |
|
766 |
&& getMouseWheelListeners().length == 0 |
|
767 |
&& !isCursorSet()) { |
|
768 |
return false; |
|
769 |
} |
|
770 |
return super.contains(x, y); |
|
771 |
} |
|
772 |
} |
|
773 |
||
774 |
/** |
|
775 |
* The default layout manager for the {@link javax.swing.JLayer}.<br/> |
|
776 |
* It places the glassPane on top of the view component |
|
777 |
* and makes it the same size as {@code JLayer}, |
|
778 |
* it also makes the view component the same size but minus layer's insets<br/> |
|
779 |
*/ |
|
780 |
private static class DefaultLayerLayout implements LayoutManager, Serializable { |
|
781 |
/** |
|
782 |
* {@inheritDoc} |
|
783 |
*/ |
|
784 |
public void layoutContainer(Container parent) { |
|
785 |
JLayer layer = (JLayer) parent; |
|
786 |
Component view = layer.getView(); |
|
787 |
Component glassPane = layer.getGlassPane(); |
|
788 |
if (view != null) { |
|
789 |
Insets insets = layer.getInsets(); |
|
790 |
view.setLocation(insets.left, insets.top); |
|
791 |
view.setSize(layer.getWidth() - insets.left - insets.right, |
|
792 |
layer.getHeight() - insets.top - insets.bottom); |
|
793 |
} |
|
794 |
if (glassPane != null) { |
|
795 |
glassPane.setLocation(0, 0); |
|
796 |
glassPane.setSize(layer.getWidth(), layer.getHeight()); |
|
797 |
} |
|
798 |
} |
|
799 |
||
800 |
/** |
|
801 |
* {@inheritDoc} |
|
802 |
*/ |
|
803 |
public Dimension minimumLayoutSize(Container parent) { |
|
804 |
JLayer layer = (JLayer) parent; |
|
805 |
Insets insets = layer.getInsets(); |
|
806 |
Dimension ret = new Dimension(insets.left + insets.right, |
|
807 |
insets.top + insets.bottom); |
|
808 |
Component view = layer.getView(); |
|
809 |
if (view != null) { |
|
810 |
Dimension size = view.getMinimumSize(); |
|
811 |
ret.width += size.width; |
|
812 |
ret.height += size.height; |
|
813 |
} |
|
814 |
if (ret.width == 0 || ret.height == 0) { |
|
815 |
ret.width = ret.height = 4; |
|
816 |
} |
|
817 |
return ret; |
|
818 |
} |
|
819 |
||
820 |
/** |
|
821 |
* {@inheritDoc} |
|
822 |
*/ |
|
823 |
public Dimension preferredLayoutSize(Container parent) { |
|
824 |
JLayer layer = (JLayer) parent; |
|
825 |
Insets insets = layer.getInsets(); |
|
826 |
Dimension ret = new Dimension(insets.left + insets.right, |
|
827 |
insets.top + insets.bottom); |
|
828 |
Component view = layer.getView(); |
|
829 |
if (view != null) { |
|
830 |
Dimension size = view.getPreferredSize(); |
|
831 |
if (size.width > 0 && size.height > 0) { |
|
832 |
ret.width += size.width; |
|
833 |
ret.height += size.height; |
|
834 |
} |
|
835 |
} |
|
836 |
return ret; |
|
837 |
} |
|
838 |
||
839 |
/** |
|
840 |
* {@inheritDoc} |
|
841 |
*/ |
|
842 |
public void addLayoutComponent(String name, Component comp) { |
|
843 |
} |
|
844 |
||
845 |
/** |
|
846 |
* {@inheritDoc} |
|
847 |
*/ |
|
848 |
public void removeLayoutComponent(Component comp) { |
|
849 |
} |
|
850 |
} |
|
3733 | 851 |
} |