blob: 29aa2228007d38ea9f7880f30b77386bec8307de (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
/*******************************************************************************
* Copyright (c) 2000, 2003 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.examples.dnd;
/**
* Transfer type to transfer SWT ImageData objects.
*/
import java.io.*;
import org.eclipse.swt.dnd.*;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
public class ImageTransfer extends ByteArrayTransfer {
private static final String TYPENAME = "imagedata";
private static final int TYPEID = registerType(TYPENAME);
private static ImageTransfer _instance = new ImageTransfer();
public static ImageTransfer getInstance () {
return _instance;
}
public void javaToNative (Object object, TransferData transferData) {
if (!checkImage(object) || !isSupportedType(transferData)) {
DND.error(DND.ERROR_INVALID_DATA);
}
ImageData imdata = (ImageData)object;
try {
// write data to a byte array and then ask super to convert to pMedium
ByteArrayOutputStream out = new ByteArrayOutputStream();
DataOutputStream writeOut = new DataOutputStream(out);
ImageLoader loader = new ImageLoader();
loader.data = new ImageData [] {imdata};
loader.save(writeOut, SWT.IMAGE_BMP);
writeOut.close();
byte[] buffer = out.toByteArray();
super.javaToNative(buffer, transferData);
out.close();
}
catch (IOException e) {
}
}
public Object nativeToJava(TransferData transferData){
if (!isSupportedType(transferData)) return null;
byte[] buffer = (byte[])super.nativeToJava(transferData);
if (buffer == null) return null;
ImageData imdata;
try {
ByteArrayInputStream in = new ByteArrayInputStream(buffer);
DataInputStream readIn = new DataInputStream(in);
imdata = new ImageData(readIn);
readIn.close();
} catch (IOException ex) {
return null;
}
return imdata;
}
protected String[] getTypeNames(){
return new String[]{TYPENAME};
}
protected int[] getTypeIds(){
return new int[] {TYPEID};
}
boolean checkImage(Object object) {
return (object != null && object instanceof ImageData);
}
protected boolean validate(Object object) {
return checkImage(object);
}
}
|
