1 /*******************************************************************************
2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.utils.ui.gfx.clipboard;
14 import java.io.ByteArrayInputStream;
15 import java.io.ByteArrayOutputStream;
16 import java.io.IOException;
17 import java.io.InputStream;
19 import org.eclipse.swt.SWT;
20 import org.eclipse.swt.dnd.ByteArrayTransfer;
21 import org.eclipse.swt.dnd.TransferData;
22 import org.eclipse.swt.graphics.ImageData;
23 import org.eclipse.swt.graphics.ImageLoader;
24 import org.simantics.utils.ui.ErrorLogger;
25 import org.simantics.utils.ui.gfx.clipboard.headers.Win32Constants;
26 import org.simantics.utils.ui.gfx.clipboard.streams.AddBitmapHeaderInputStream;
27 import org.simantics.utils.ui.gfx.clipboard.streams.RemoveBitmapHeaderOutputStream;
28 import org.simantics.utils.ui.gfx.clipboard.streams.UncompressedDIBInputStream;
32 * Transfer class for handing image cut/copy/paste operations between Eclipse
33 * and native WIN32 apps
35 * @author Marko Luukkainen
38 public class ImageDataTransfer extends ByteArrayTransfer {
40 private static final ImageDataTransfer instance = new ImageDataTransfer();
42 private static final String CF_DIB = "CF_DIB";
44 private ImageDataTransfer() {
48 public static ImageDataTransfer getInstance() {
49 return ImageDataTransfer.instance;
53 * @see org.eclipse.swt.dnd.Transfer#getTypeIds()
56 protected final int[] getTypeIds() {
57 return new int[] { Win32Constants.CF_DIB };
61 * @see org.eclipse.swt.dnd.Transfer#getTypeNames()
64 protected final String[] getTypeNames() {
65 return new String[] { ImageDataTransfer.CF_DIB };
69 * @see org.eclipse.swt.dnd.ByteArrayTransfer#nativeToJava(org.eclipse.swt.dnd.TransferData)
72 protected Object nativeToJava(TransferData transferData) {
73 final Object o = super.nativeToJava(transferData);
74 final byte[] bytes = (byte[]) o;
77 final InputStream iStream = new AddBitmapHeaderInputStream(
78 new UncompressedDIBInputStream(new ByteArrayInputStream(
80 final ImageData[] data = new ImageLoader().load(iStream);
81 if (data.length <= 0) {
85 } catch (IOException e) {
86 ErrorLogger.defaultLogError("Cannot get image from clipboard", e);
92 * @see org.eclipse.swt.dnd.ByteArrayTransfer#javaToNative(java.lang.Object, org.eclipse.swt.dnd.TransferData)
95 protected void javaToNative(Object object, TransferData transferData) {
96 final ImageData imgData = (ImageData) object;
97 final ImageLoader loader = new ImageLoader();
98 final ByteArrayOutputStream oStream = new ByteArrayOutputStream();
101 loader.data = new ImageData[] { imgData };
102 loader.save(new RemoveBitmapHeaderOutputStream(oStream), SWT.IMAGE_BMP);
103 bytes = oStream.toByteArray();
104 super.javaToNative(bytes, transferData);