Mercurial > projects > dwt-mac
annotate dwt/dnd/ImageTransfer.d @ 45:d8635bb48c7c
Merge with SWT 3.5
author | Jacob Carlborg <doob@me.com> |
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date | Mon, 01 Dec 2008 17:07:00 +0100 |
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rev | line source |
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1 /******************************************************************************* |
45 | 2 * Copyright (c) 2007, 2008 IBM Corporation and others. |
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3 * All rights reserved. This program and the accompanying materials |
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4 * are made available under the terms of the Eclipse Public License v1.0 |
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5 * which accompanies this distribution, and is available at |
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6 * http://www.eclipse.org/legal/epl-v10.html |
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7 * |
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8 * Contributors: |
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9 * IBM Corporation - initial API and implementation |
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10 * Outhink - support for typeFileURL |
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11 *******************************************************************************/ |
45 | 12 module dwt.dnd.ImageTransfer; |
13 | |
14 import dwt.dwthelper.utils; | |
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15 |
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16 import dwt.DWT; |
45 | 17 import dwt.graphics.Image; |
18 import dwt.graphics.ImageData; | |
19 import dwt.internal.cocoa.NSData; | |
20 import dwt.internal.cocoa.NSImage; | |
21 import dwt.internal.cocoa.OS; | |
22 import dwt.widgets.Display; | |
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23 |
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24 /** |
45 | 25 * The class <code>ImageTransfer</code> provides a platform specific mechanism |
26 * for converting an Image represented as a java <code>ImageData</code> to a | |
27 * platform specific representation of the data and vice versa. | |
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28 * |
45 | 29 * <p>An example of a java <code>ImageData</code> is shown below:</p> |
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30 * |
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31 * <code><pre> |
45 | 32 * Image image = new Image(display, "C:\temp\img1.gif"); |
33 * ImageData imgData = image.getImageData(); | |
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34 * </code></pre> |
45 | 35 * |
36 * @see Transfer | |
37 * | |
38 * @since 3.4 | |
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39 */ |
45 | 40 public class ImageTransfer extends ByteArrayTransfer { |
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41 |
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42 static ImageTransfer _instance = new ImageTransfer(); |
45 | 43 static final String TIFF = OS.NSTIFFPboardType.getString(); |
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44 static final int TIFFID = registerType(TIFF); |
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45 |
45 | 46 ImageTransfer() { |
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47 } |
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48 |
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49 /** |
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50 * Returns the singleton instance of the ImageTransfer class. |
45 | 51 * |
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52 * @return the singleton instance of the ImageTransfer class |
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53 */ |
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54 public static ImageTransfer getInstance() { |
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55 return _instance; |
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56 } |
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57 |
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58 /** |
45 | 59 * This implementation of <code>javaToNative</code> converts an ImageData object represented |
60 * by java <code>ImageData</code> to a platform specific representation. | |
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61 * |
45 | 62 * @param object a java <code>ImageData</code> containing the ImageData to be converted |
63 * @param transferData an empty <code>TransferData</code> object that will | |
64 * be filled in on return with the platform specific format of the data | |
65 * | |
66 * @see Transfer#nativeToJava | |
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67 */ |
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68 public void javaToNative(Object object, TransferData transferData) { |
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69 if (!checkImage(object) || !isSupportedType(transferData)) { |
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70 DND.error(DND.ERROR_INVALID_DATA); |
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71 } |
45 | 72 ImageData imgData = (ImageData) object; |
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73 Image image = new Image(Display.getCurrent(), imgData); |
45 | 74 NSImage handle = image.handle; |
75 transferData.data = handle.TIFFRepresentation(); | |
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76 image.dispose(); |
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77 } |
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78 |
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79 /** |
45 | 80 * This implementation of <code>nativeToJava</code> converts a platform specific |
81 * representation of an image to java <code>ImageData</code>. | |
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82 * |
45 | 83 * @param transferData the platform specific representation of the data to be converted |
84 * @return a java <code>ImageData</code> of the image if the conversion was successful; | |
85 * otherwise null | |
86 * | |
87 * @see Transfer#javaToNative | |
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88 */ |
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89 public Object nativeToJava(TransferData transferData) { |
45 | 90 if (!isSupportedType(transferData) || transferData.data is null) return null; |
91 NSData data = (NSData) transferData.data; | |
92 if (data.length() is 0) return null; | |
93 NSImage nsImage = (NSImage) new NSImage().alloc(); | |
94 nsImage.initWithData(data); | |
95 //TODO: Image representation wrong??? | |
96 Image image = Image.cocoa_new(Display.getCurrent(), DWT.BITMAP, nsImage); | |
97 ImageData imageData = image.getImageData(); | |
98 image.dispose(); | |
99 return imageData; | |
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100 } |
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101 |
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102 protected int[] getTypeIds() { |
45 | 103 return new int[] { TIFFID }; |
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104 } |
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105 |
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106 protected String[] getTypeNames() { |
45 | 107 return new String[] { TIFF }; |
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108 } |
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109 |
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110 bool checkImage(Object object) { |
45 | 111 if (object is null || !(object instanceof ImageData)) return false; |
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112 return true; |
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113 } |
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114 |
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115 protected bool validate(Object object) { |
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116 return checkImage(object); |
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117 } |
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118 } |