author | pchelko |
Mon, 13 Jan 2014 19:09:24 +0400 | |
changeset 23260 | d68cbf54738f |
parent 21278 | ef8a3a2a72f2 |
permissions | -rw-r--r-- |
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/* |
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8007155: [macosx] Disabled panel takes mouse input in JLayeredPane
alexsch
parents:
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changeset
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* Copyright (c) 1999, 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.awt; |
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import java.awt.*; |
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import java.awt.event.InputEvent; |
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import java.awt.event.InvocationEvent; |
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/** |
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* A stateless class which responds to native mouse moves, Component resizes, |
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* Component moves, showing and hiding of Components, minimizing and |
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* maximizing of top level Windows, addition and removal of Components, |
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* and calls to setCursor(). |
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*/ |
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public abstract class GlobalCursorManager { |
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class NativeUpdater implements Runnable { |
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boolean pending = false; |
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public void run() { |
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boolean shouldUpdate = false; |
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synchronized (this) { |
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if (pending) { |
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pending = false; |
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shouldUpdate = true; |
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} |
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} |
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if (shouldUpdate) { |
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_updateCursor(false); |
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} |
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} |
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public void postIfNotPending(Component heavy, InvocationEvent in) { |
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boolean shouldPost = false; |
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synchronized (this) { |
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if (!pending) { |
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pending = shouldPost = true; |
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} |
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} |
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if (shouldPost) { |
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SunToolkit.postEvent(SunToolkit.targetToAppContext(heavy), in); |
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} |
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} |
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} |
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/** |
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* Use a singleton NativeUpdater for better performance. We cannot use |
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* a singleton InvocationEvent because we want each event to have a fresh |
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* timestamp. |
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*/ |
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private final NativeUpdater nativeUpdater = new NativeUpdater(); |
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/** |
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* The last time the cursor was updated, in milliseconds. |
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*/ |
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private long lastUpdateMillis; |
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/** |
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* Locking object for synchronizing access to lastUpdateMillis. The VM |
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* does not guarantee atomicity of longs. |
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*/ |
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private final Object lastUpdateLock = new Object(); |
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/** |
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* Should be called for any activity at the Java level which may affect |
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* the global cursor, except for Java MOUSE_MOVED events. |
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*/ |
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public void updateCursorImmediately() { |
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synchronized (nativeUpdater) { |
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nativeUpdater.pending = false; |
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} |
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_updateCursor(false); |
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} |
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/** |
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* Should be called in response to Java MOUSE_MOVED events. The update |
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* will be discarded if the InputEvent is outdated. |
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* |
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* @param e the InputEvent which triggered the cursor update. |
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*/ |
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public void updateCursorImmediately(InputEvent e) { |
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boolean shouldUpdate; |
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synchronized (lastUpdateLock) { |
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shouldUpdate = (e.getWhen() >= lastUpdateMillis); |
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} |
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if (shouldUpdate) { |
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_updateCursor(true); |
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} |
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} |
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/** |
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* Should be called in response to a native mouse enter or native mouse |
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* button released message. Should not be called during a mouse drag. |
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*/ |
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public void updateCursorLater(Component heavy) { |
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nativeUpdater.postIfNotPending(heavy, new InvocationEvent |
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(Toolkit.getDefaultToolkit(), nativeUpdater)); |
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} |
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protected GlobalCursorManager() { } |
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/** |
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* Set the global cursor to the specified cursor. The component over |
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* which the Cursor current resides is provided as a convenience. Not |
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* all platforms may require the Component. |
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*/ |
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protected abstract void setCursor(Component comp, Cursor cursor, |
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boolean useCache); |
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/** |
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* Returns the global cursor position, in screen coordinates. |
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*/ |
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protected abstract void getCursorPos(Point p); |
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protected abstract Point getLocationOnScreen(Component com); |
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/** |
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* Returns the most specific, visible, heavyweight Component |
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* under the cursor. This method should return null iff the cursor is |
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* not over any Java Window. |
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* |
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* @param useCache If true, the implementation is free to use caching |
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* mechanisms because the Z-order, visibility, and enabled state of the |
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* Components has not changed. If false, the implementation should not |
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* make these assumptions. |
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*/ |
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protected abstract Component findHeavyweightUnderCursor(boolean useCache); |
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/** |
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* Updates the global cursor. We apply a three-step scheme to cursor |
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* updates:<p> |
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* |
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* (1) InputEvent updates which are outdated are discarded by |
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* <code>updateCursorImmediately(InputEvent)</code>.<p> |
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* |
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* (2) If 'useCache' is true, the native code is free to use a cached |
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* value to determine the most specific, visible, enabled heavyweight |
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* because this update is occurring in response to a mouse move. If |
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* 'useCache' is false, the native code must perform a new search given |
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* the current mouse coordinates. |
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* |
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* (3) Once we have determined the most specific, visible, enabled |
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* heavyweight, we use findComponentAt to find the most specific, visible, |
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* enabled Component. |
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*/ |
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private void _updateCursor(boolean useCache) { |
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synchronized (lastUpdateLock) { |
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lastUpdateMillis = System.currentTimeMillis(); |
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} |
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Point queryPos = null, p = null; |
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Component comp; |
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try { |
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comp = findHeavyweightUnderCursor(useCache); |
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if (comp == null) { |
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updateCursorOutOfJava(); |
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return; |
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} |
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if (comp instanceof Window) { |
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4371
dc9dcb8b0ae7
6823138: Need to replace ComponentAccessor with AWTAccessor
dcherepanov
parents:
2
diff
changeset
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p = AWTAccessor.getComponentAccessor().getLocation(comp); |
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} else if (comp instanceof Container) { |
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p = getLocationOnScreen(comp); |
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} |
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if (p != null) { |
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queryPos = new Point(); |
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getCursorPos(queryPos); |
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20165
75e673bbdba6
8007155: [macosx] Disabled panel takes mouse input in JLayeredPane
alexsch
parents:
5506
diff
changeset
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Component c = AWTAccessor.getContainerAccessor(). |
75e673bbdba6
8007155: [macosx] Disabled panel takes mouse input in JLayeredPane
alexsch
parents:
5506
diff
changeset
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findComponentAt((Container) comp, |
75e673bbdba6
8007155: [macosx] Disabled panel takes mouse input in JLayeredPane
alexsch
parents:
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diff
changeset
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queryPos.x - p.x, queryPos.y - p.y, false); |
75e673bbdba6
8007155: [macosx] Disabled panel takes mouse input in JLayeredPane
alexsch
parents:
5506
diff
changeset
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// If findComponentAt returns null, then something bad has |
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// happened. For example, the heavyweight Component may |
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// have been hidden or disabled by another thread. In that |
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// case, we'll just use the originial heavyweight. |
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if (c != null) { |
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comp = c; |
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} |
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} |
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dcherepanov
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setCursor(comp, AWTAccessor.getComponentAccessor().getCursor(comp), useCache); |
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} catch (IllegalComponentStateException e) { |
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// Shouldn't happen, but if it does, abort. |
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} |
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} |
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protected void updateCursorOutOfJava() { |
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// Cursor is not over a Java Window. Do nothing...usually |
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// But we need to update it in case of grab on X. |
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} |
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} |