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1
11 package org.eclipse.help.ui.internal.util;
12
13 import org.eclipse.jface.resource.*;
14 import org.eclipse.swt.graphics.*;
15
16
19 public abstract class AbstractOverlayIcon extends CompositeImageDescriptor {
20
21 static final int DEFAULT_WIDTH = 16;
22 static final int DEFAULT_HEIGHT = 16;
23
24 private Point fSize = null;
25
26 private ImageDescriptor fOverlays[][];
27
28 public AbstractOverlayIcon(ImageDescriptor[][] overlays) {
29 this(overlays, null);
30 }
31
32 public AbstractOverlayIcon(ImageDescriptor[][] overlays, Point size) {
33 fOverlays = overlays;
34 if (size != null)
35 fSize = size;
36 else
37 fSize = new Point(DEFAULT_WIDTH, DEFAULT_HEIGHT);
38 }
39 protected void drawBottomLeft(ImageDescriptor[] overlays) {
40 if (overlays == null)
41 return;
42 int length = overlays.length;
43 int x = 0;
44 for (int i = 0; i < 3; i++) {
45 if (i < length && overlays[i] != null) {
46 ImageData id = overlays[i].getImageData();
47 drawImage(id, x, getSize().y - id.height);
48 x += id.width;
49 }
50 }
51 }
52 protected void drawBottomRight(ImageDescriptor[] overlays) {
53 if (overlays == null)
54 return;
55 int length = overlays.length;
56 int x = getSize().x;
57 for (int i = 2; i >= 0; i--) {
58 if (i < length && overlays[i] != null) {
59 ImageData id = overlays[i].getImageData();
60 x -= id.width;
61 drawImage(id, x, getSize().y - id.height);
62 }
63 }
64 }
65
66 protected abstract ImageData getBaseImageData();
67
68 protected void drawCompositeImage(int width, int height) {
69 ImageData base = getBaseImageData();
70 drawImage(base, 0, 0);
71 if (fOverlays != null) {
72 if (fOverlays.length > 0)
73 drawTopRight(fOverlays[0]);
74
75 if (fOverlays.length > 1)
76 drawBottomRight(fOverlays[1]);
77
78 if (fOverlays.length > 2)
79 drawBottomLeft(fOverlays[2]);
80
81 if (fOverlays.length > 3)
82 drawTopLeft(fOverlays[3]);
83 }
84 }
85 protected void drawTopLeft(ImageDescriptor[] overlays) {
86 if (overlays == null)
87 return;
88 int length = overlays.length;
89 int x = 0;
90 for (int i = 0; i < 3; i++) {
91 if (i < length && overlays[i] != null) {
92 ImageData id = overlays[i].getImageData();
93 drawImage(id, x, 0);
94 x += id.width;
95 }
96 }
97 }
98 protected void drawTopRight(ImageDescriptor[] overlays) {
99 if (overlays == null)
100 return;
101 int length = overlays.length;
102 int x = getSize().x;
103 for (int i = 2; i >= 0; i--) {
104 if (i < length && overlays[i] != null) {
105 ImageData id = overlays[i].getImageData();
106 x -= id.width;
107 drawImage(id, x, 0);
108 }
109 }
110 }
111
112 protected Point getSize() {
113 return fSize;
114 }
115 }
116 |
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