| /* |
| * Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * This class is a placeholder for all internal static objects that represent |
| * system state. We keep our representation up-to-date with actual system |
| * state by tracking events, such as X Focus, Component under cursor etc. |
| * All attributes should be static private with accessors to simpify change |
| * tracking. |
| */ |
| package sun.awt.X11; |
| |
| import java.awt.Component; |
| import java.lang.ref.WeakReference; |
| |
| class XAwtState { |
| /** |
| * The mouse is over this component. |
| * If the component is not disabled, it received MOUSE_ENTERED but no MOUSE_EXITED. |
| */ |
| private static WeakReference componentMouseEnteredRef = null; |
| |
| static void setComponentMouseEntered(Component component) { |
| XToolkit.awtLock(); |
| try { |
| if (component == null) { |
| componentMouseEnteredRef = null; |
| return; |
| } |
| if (component != getComponentMouseEntered()) { |
| componentMouseEnteredRef = new WeakReference(component); |
| } |
| } finally { |
| XToolkit.awtUnlock(); |
| } |
| } |
| |
| static Component getComponentMouseEntered() { |
| XToolkit.awtLock(); |
| try { |
| if (componentMouseEnteredRef == null) { |
| return null; |
| } |
| return (Component)componentMouseEnteredRef.get(); |
| } finally { |
| XToolkit.awtUnlock(); |
| } |
| } |
| |
| /** |
| * The XBaseWindow is created with OwnerGrabButtonMask |
| * (see X vol. 1, 8.3.3.2) so inside the app Key, Motion, and Button events |
| * are received by the window they actualy happened on, not the grabber. |
| * Then XBaseWindow dispatches them to the grabber. As a result |
| * XAnyEvent.get_window() returns actual window the event is originated, |
| * though the event is dispatched by the grabber. |
| */ |
| private static boolean inManualGrab = false; |
| |
| static boolean isManualGrab() { |
| return inManualGrab; |
| } |
| |
| private static WeakReference grabWindowRef = null; |
| |
| /** |
| * The X Active Grab overrides any other active grab by the same |
| * client see XGrabPointer, XGrabKeyboard |
| */ |
| static void setGrabWindow(XBaseWindow grabWindow) { |
| setGrabWindow(grabWindow, false); |
| } |
| |
| /** |
| * Automatic passive grab doesn't override active grab see XGrabButton |
| */ |
| static void setAutoGrabWindow(XBaseWindow grabWindow) { |
| setGrabWindow(grabWindow, true); |
| } |
| |
| private static void setGrabWindow(XBaseWindow grabWindow, boolean isAutoGrab) { |
| XToolkit.awtLock(); |
| try { |
| if (inManualGrab && isAutoGrab) { |
| return; |
| } |
| inManualGrab = grabWindow != null && !isAutoGrab; |
| if (grabWindow == null) { |
| grabWindowRef = null; |
| return; |
| } |
| if (grabWindow != getGrabWindow()) { |
| grabWindowRef = new WeakReference(grabWindow); |
| } |
| } finally { |
| XToolkit.awtUnlock(); |
| } |
| } |
| |
| static XBaseWindow getGrabWindow() { |
| XToolkit.awtLock(); |
| try { |
| if (grabWindowRef == null) { |
| return null; |
| } |
| XBaseWindow xbw = (XBaseWindow)grabWindowRef.get(); |
| if( xbw != null && xbw.isDisposed() ) { |
| xbw = null; |
| grabWindowRef = null; |
| }else if( xbw == null ) { |
| grabWindowRef = null; |
| } |
| return xbw; |
| } finally { |
| XToolkit.awtUnlock(); |
| } |
| } |
| } |