J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1999-2004 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.awt.motif; |
| 27 | |
| 28 | import java.awt.*; |
| 29 | import sun.awt.GlobalCursorManager; |
| 30 | import sun.awt.GlobalCursorManager.*; |
| 31 | |
| 32 | public final class MGlobalCursorManager extends GlobalCursorManager { |
| 33 | |
| 34 | static { |
| 35 | cacheInit(); |
| 36 | } |
| 37 | |
| 38 | private native static void cacheInit(); |
| 39 | |
| 40 | // cached nativeContainer |
| 41 | private Component nativeContainer; |
| 42 | |
| 43 | |
| 44 | /** |
| 45 | * The MGlobalCursorManager is a singleton. |
| 46 | */ |
| 47 | private static MGlobalCursorManager manager; |
| 48 | |
| 49 | |
| 50 | static GlobalCursorManager getCursorManager() { |
| 51 | if (manager == null) { |
| 52 | manager = new MGlobalCursorManager(); |
| 53 | } |
| 54 | return manager; |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * Should be called in response to a native mouse enter or native mouse |
| 59 | * button released message. Should not be called during a mouse drag. |
| 60 | */ |
| 61 | static void nativeUpdateCursor(Component heavy) { |
| 62 | MGlobalCursorManager.getCursorManager().updateCursorLater(heavy); |
| 63 | } |
| 64 | |
| 65 | |
| 66 | protected void setCursor(Component comp, Cursor cursor, boolean useCache) { |
| 67 | if (comp == null) { |
| 68 | return; |
| 69 | } |
| 70 | |
| 71 | Cursor cur = useCache ? cursor : getCapableCursor(comp); |
| 72 | |
| 73 | Component nc = useCache ? nativeContainer : getNativeContainer(comp); |
| 74 | |
| 75 | // System.out.println(" set cursor="+cursor+" on "+comp+" new curs="+cur); |
| 76 | if (nc != null && nc.isDisplayable()) { |
| 77 | nativeContainer = nc; |
| 78 | ((MComponentPeer)nc.getPeer()).pSetCursor(cur); |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | private Component getNativeContainer(Component comp) { |
| 83 | while (comp != null && comp.isLightweight()) { |
| 84 | comp = comp.getParent(); |
| 85 | } |
| 86 | return comp; |
| 87 | } |
| 88 | |
| 89 | protected native void getCursorPos(Point p); |
| 90 | protected native Component findHeavyweightUnderCursor(); |
| 91 | |
| 92 | /* |
| 93 | * two native methods to call corresponding methods in Container and |
| 94 | * Component |
| 95 | */ |
| 96 | protected native Component findComponentAt(Container con, int x, int y); |
| 97 | protected native Point getLocationOnScreen(Component com); |
| 98 | |
| 99 | protected Component findHeavyweightUnderCursor(boolean useCache) { |
| 100 | return findHeavyweightUnderCursor(); |
| 101 | } |
| 102 | |
| 103 | private Cursor getCapableCursor(Component comp) { |
| 104 | Component c = comp; |
| 105 | while ((c != null) && !(c instanceof Window) && |
| 106 | c.isEnabled() && c.isVisible() && c.isDisplayable()) { |
| 107 | c = c.getParent(); |
| 108 | } |
| 109 | if (c instanceof Window) { |
| 110 | return (c.isEnabled() && c.isVisible() && c.isDisplayable() && comp.isEnabled()) ? |
| 111 | comp.getCursor() : |
| 112 | Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR); |
| 113 | } else if (c == null) { |
| 114 | return null; |
| 115 | } |
| 116 | return getCapableCursor(c.getParent()); |
| 117 | } |
| 118 | } |