1 /* 2 * Copyright (c) 2011, Oracle and/or its affiliates. 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.lwawt.macosx; 27 28 import java.awt.*; 29 import java.awt.geom.Point2D; 30 31 import sun.lwawt.*; 32 33 public class CCursorManager extends LWCursorManager { 34 private static native Point2D nativeGetCursorPosition(); 35 private static native void nativeSetBuiltInCursor(final int type, final String name); 36 private static native void nativeSetCustomCursor(final long imgPtr, final double x, final double y); 37 38 private static final int NAMED_CURSOR = -1; 39 40 private final static CCursorManager theInstance = new CCursorManager(); 41 public static CCursorManager getInstance() { 42 return theInstance; 43 } 44 45 Cursor currentCursor; 46 47 private CCursorManager() { } 48 49 @Override 50 protected Point getCursorPosition() { 51 synchronized(this) { 52 if (isDragging) { 53 // during the drag operation, the appkit thread is blocked, 54 // so nativeGetCursorPosition invocation may cause a deadlock. 55 // In order to avoid this, we returns last know cursor position. 56 return new Point(dragPos); 57 } 58 } 59 60 final Point2D nativePosition = nativeGetCursorPosition(); 61 return new Point((int)nativePosition.getX(), (int)nativePosition.getY()); 62 } 63 64 @Override 65 protected void setCursor(final LWWindowPeer windowUnderCursor, final Cursor cursor) { 66 if (cursor == currentCursor) return; 67 68 if (cursor == null) { 69 nativeSetBuiltInCursor(Cursor.DEFAULT_CURSOR, null); 70 return; 71 } 72 73 if (cursor instanceof CCustomCursor) { 74 final CCustomCursor customCursor = ((CCustomCursor)cursor); 75 final long imagePtr = customCursor.getImageData(); 76 final Point hotSpot = customCursor.getHotSpot(); 77 if(imagePtr != 0L) nativeSetCustomCursor(imagePtr, hotSpot.x, hotSpot.y); 78 return; 79 } 80 81 final int type = cursor.getType(); 82 if (type != Cursor.CUSTOM_CURSOR) { 83 nativeSetBuiltInCursor(type, null); 84 return; 85 } 86 87 final String name = cursor.getName(); 88 if (name != null) { 89 nativeSetBuiltInCursor(NAMED_CURSOR, name); 90 return; 91 } 92 93 // do something special 94 throw new RuntimeException("Unimplemented"); 95 } 96 97 static long getNativeWindow(final LWWindowPeer window) { 98 if (window == null) return 0; 99 final CPlatformWindow platformWindow = (CPlatformWindow)window.getPlatformWindow(); 100 if (platformWindow == null) return 0; 101 return platformWindow.getNSWindowPtr(); 102 } 103 104 // package private methods to handle cursor change during drag-and-drop 105 private boolean isDragging = false; 106 private Point dragPos = null; 107 108 synchronized void startDrag(int x, int y) { 109 if (isDragging) { 110 throw new RuntimeException("Invalid Drag state in CCursorManager!"); 111 } 112 113 isDragging = true; 114 115 dragPos = new Point(x, y); 116 } 117 118 synchronized void updateDragPosition(int x, int y) { 119 if (!isDragging) { 120 throw new RuntimeException("Invalid Drag state in CCursorManager!"); 121 } 122 dragPos.move(x, y); 123 } 124 125 synchronized void stopDrag() { 126 if (!isDragging) { 127 throw new RuntimeException("Invalid Drag state in CCursorManager!"); 128 } 129 isDragging = false; 130 dragPos = null; 131 } 132 }