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1
11 package org.eclipse.compare.internal;
12
13 import java.io.InputStream  ;
14 import java.io.IOException ;
15 import java.util.ResourceBundle ;
16
17 import org.eclipse.swt.SWT;
18 import org.eclipse.swt.SWTException;
19 import org.eclipse.swt.graphics.Image;
20 import org.eclipse.swt.widgets.Composite;
21 import org.eclipse.swt.widgets.Display;
22 import org.eclipse.ui.PlatformUI;
23 import org.eclipse.core.runtime.CoreException;
24
25 import org.eclipse.compare.*;
26 import org.eclipse.compare.contentmergeviewer.ContentMergeViewer;
27
28
30 public class ImageMergeViewer extends ContentMergeViewer {
31
32 private static final String BUNDLE_NAME= "org.eclipse.compare.internal.ImageMergeViewerResources";
34 private Object fLeftImage;
35 private Object fRightImage;
36
37 private ImageCanvas fAncestor;
38 private ImageCanvas fLeft;
39 private ImageCanvas fRight;
40
41
42 public ImageMergeViewer(Composite parent, int styles, CompareConfiguration mp) {
43 super(styles, ResourceBundle.getBundle(BUNDLE_NAME), mp);
44
45 PlatformUI.getWorkbench().getHelpSystem().setHelp(parent, ICompareContextIds.IMAGE_COMPARE_VIEW);
46
47 buildControl(parent);
48 String title= Utilities.getString(getResourceBundle(), "title"); getControl().setData(CompareUI.COMPARE_VIEWER_TITLE, title);
50 }
51
52 protected void updateContent(Object ancestor, Object left, Object right) {
53
54 setInput(fAncestor, ancestor);
55
56 fLeftImage= left;
57 setInput(fLeft, left);
58
59 fRightImage= right;
60 setInput(fRight, right);
61 }
62
63
66 protected byte[] getContents(boolean left) {
67 return null;
68 }
69
70 public void createControls(Composite composite) {
71 fAncestor= new ImageCanvas(composite, SWT.NO_FOCUS);
72 fLeft= new ImageCanvas(composite, SWT.NO_FOCUS);
73 fRight= new ImageCanvas(composite, SWT.NO_FOCUS);
74 }
75
76 private static void setInput(ImageCanvas canvas, Object input) {
77 if (canvas != null) {
78
79 InputStream stream= null;
80 if (input instanceof IStreamContentAccessor) {
81 IStreamContentAccessor sca= (IStreamContentAccessor) input;
82 if (sca != null) {
83 try {
84 stream= sca.getContents();
85 } catch (CoreException ex) {
86 }
88 }
89 }
90
91 Image image= null;
92 Display display= canvas.getDisplay();
93 if (stream != null) {
94 try {
95 image= new Image(display, stream);
96 } catch (SWTException ex) {
97 }
99 }
100
101 canvas.setImage(image);
102 if (image != null) {
103 canvas.setBackground(display.getSystemColor(SWT.COLOR_LIST_BACKGROUND));
104 } else {
105 canvas.setBackground(null);
106 }
107
108 if (stream != null) {
109 try {
110 stream.close();
111 } catch (IOException ex) {
112 }
114 }
115 }
116 }
117
118 protected void handleResizeAncestor(int x, int y, int width, int height) {
119 if (width > 0) {
120 fAncestor.setVisible(true);
121 fAncestor.setBounds(x, y, width, height);
122 } else {
123 fAncestor.setVisible(false);
124 }
125 }
126
127 protected void handleResizeLeftRight(int x, int y, int width1, int centerWidth, int width2, int height) {
128 fLeft.setBounds(x, y, width1, height);
129 fRight.setBounds(x+width1+centerWidth, y, width2, height);
130 }
131
132 protected void copy(boolean leftToRight) {
133 if (leftToRight) {
134 fRightImage= fLeftImage;
135 setInput(fRight, fRightImage);
136 setRightDirty(true);
137 } else {
138 fLeftImage= fRightImage;
139 setInput(fLeft, fLeftImage);
140 setLeftDirty(true);
141 }
142 }
143 }
144
145 |
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