| /* |
| * Copyright (c) 1997, 2009, 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. |
| */ |
| |
| package sun.awt.windows; |
| |
| import java.awt.Component; |
| import java.awt.Cursor; |
| import java.awt.Image; |
| import java.awt.Point; |
| import java.awt.image.BufferedImage; |
| import java.awt.image.DataBufferInt; |
| |
| import java.awt.datatransfer.Transferable; |
| |
| import java.awt.dnd.DragGestureEvent; |
| import java.awt.dnd.InvalidDnDOperationException; |
| |
| import java.awt.event.InputEvent; |
| |
| import java.util.Map; |
| |
| import sun.awt.dnd.SunDragSourceContextPeer; |
| |
| /** |
| * <p> |
| * TBC |
| * </p> |
| * |
| * @since JDK1.2 |
| * |
| */ |
| |
| final class WDragSourceContextPeer extends SunDragSourceContextPeer { |
| public void startSecondaryEventLoop(){ |
| WToolkit.startSecondaryEventLoop(); |
| } |
| public void quitSecondaryEventLoop(){ |
| WToolkit.quitSecondaryEventLoop(); |
| } |
| |
| private static final WDragSourceContextPeer theInstance = |
| new WDragSourceContextPeer(null); |
| |
| /** |
| * construct a new WDragSourceContextPeer. package private |
| */ |
| |
| private WDragSourceContextPeer(DragGestureEvent dge) { |
| super(dge); |
| } |
| |
| static WDragSourceContextPeer createDragSourceContextPeer(DragGestureEvent dge) throws InvalidDnDOperationException { |
| theInstance.setTrigger(dge); |
| return theInstance; |
| } |
| |
| protected void startDrag(Transferable trans, |
| long[] formats, Map formatMap) { |
| |
| long nativeCtxtLocal = 0; |
| |
| nativeCtxtLocal = createDragSource(getTrigger().getComponent(), |
| trans, |
| getTrigger().getTriggerEvent(), |
| getTrigger().getSourceAsDragGestureRecognizer().getSourceActions(), |
| formats, |
| formatMap); |
| |
| if (nativeCtxtLocal == 0) { |
| throw new InvalidDnDOperationException("failed to create native peer"); |
| } |
| |
| int[] imageData = null; |
| Point op = null; |
| |
| Image im = getDragImage(); |
| int imageWidth = -1; |
| int imageHeight = -1; |
| if (im != null) { |
| //image is ready (partial images are ok) |
| try{ |
| imageWidth = im.getWidth(null); |
| imageHeight = im.getHeight(null); |
| if (imageWidth < 0 || imageHeight < 0) { |
| throw new InvalidDnDOperationException("drag image is not ready"); |
| } |
| //We could get an exception from user code here. |
| //"im" and "dragImageOffset" are user-defined objects |
| op = getDragImageOffset(); //op could not be null here |
| BufferedImage bi = new BufferedImage( |
| imageWidth, |
| imageHeight, |
| BufferedImage.TYPE_INT_ARGB); |
| bi.getGraphics().drawImage(im, 0, 0, null); |
| |
| //we can get out-of-memory here |
| imageData = ((DataBufferInt)bi.getData().getDataBuffer()).getData(); |
| } catch (Throwable ex) { |
| throw new InvalidDnDOperationException("drag image creation problem: " + ex.getMessage()); |
| } |
| } |
| |
| //We shouldn't have user-level exceptions since now. |
| //Any exception leads to corrupted D'n'D state. |
| setNativeContext(nativeCtxtLocal); |
| WDropTargetContextPeer.setCurrentJVMLocalSourceTransferable(trans); |
| |
| if (imageData != null) { |
| doDragDrop( |
| getNativeContext(), |
| getCursor(), |
| imageData, |
| imageWidth, imageHeight, |
| op.x, op.y); |
| } else { |
| doDragDrop( |
| getNativeContext(), |
| getCursor(), |
| null, |
| -1, -1, |
| 0, 0); |
| } |
| } |
| |
| /** |
| * downcall into native code |
| */ |
| |
| native long createDragSource(Component component, |
| Transferable transferable, |
| InputEvent nativeTrigger, |
| int actions, |
| long[] formats, |
| Map formatMap); |
| |
| /** |
| * downcall into native code |
| */ |
| |
| native void doDragDrop( |
| long nativeCtxt, |
| Cursor cursor, |
| int[] imageData, |
| int imgWidth, int imgHight, |
| int offsetX, int offsetY); |
| |
| protected native void setNativeCursor(long nativeCtxt, Cursor c, int cType); |
| |
| } |