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1
11 package org.eclipse.jdt.internal.ui.preferences;
12
13 import org.eclipse.swt.SWT;
14 import org.eclipse.swt.events.DisposeEvent;
15 import org.eclipse.swt.events.DisposeListener;
16 import org.eclipse.swt.events.SelectionAdapter;
17 import org.eclipse.swt.events.SelectionEvent;
18 import org.eclipse.swt.graphics.Color;
19 import org.eclipse.swt.graphics.Font;
20 import org.eclipse.swt.graphics.GC;
21 import org.eclipse.swt.graphics.Image;
22 import org.eclipse.swt.graphics.Point;
23 import org.eclipse.swt.graphics.RGB;
24 import org.eclipse.swt.widgets.Button;
25 import org.eclipse.swt.widgets.ColorDialog;
26 import org.eclipse.swt.widgets.Composite;
27 import org.eclipse.swt.widgets.Control;
28 import org.eclipse.swt.widgets.Display;
29
30 import org.eclipse.jface.resource.JFaceResources;
31
32
35 public class ColorEditor {
36
37 private Point fExtent;
38 private Image fImage;
39 private RGB fColorValue;
40 private Color fColor;
41 private Button fButton;
42
43 public ColorEditor(Composite parent) {
44
45 fButton= new Button(parent, SWT.PUSH);
46 fExtent= computeImageSize(parent);
47 fImage= new Image(parent.getDisplay(), fExtent.x, fExtent.y);
48
49 GC gc= new GC(fImage);
50 gc.setBackground(fButton.getBackground());
51 gc.fillRectangle(0, 0, fExtent.x, fExtent.y);
52 gc.dispose();
53
54 fButton.setImage(fImage);
55 fButton.addSelectionListener(new SelectionAdapter() {
56 public void widgetSelected(SelectionEvent event) {
57 ColorDialog colorDialog= new ColorDialog(fButton.getShell());
58 colorDialog.setRGB(fColorValue);
59 RGB newColor = colorDialog.open();
60 if (newColor != null) {
61 fColorValue= newColor;
62 updateColorImage();
63 }
64 }
65 });
66
67 fButton.addDisposeListener(new DisposeListener() {
68 public void widgetDisposed(DisposeEvent event) {
69 if (fImage != null) {
70 fImage.dispose();
71 fImage= null;
72 }
73 if (fColor != null) {
74 fColor.dispose();
75 fColor= null;
76 }
77 }
78 });
79 }
80
81 public RGB getColorValue() {
82 return fColorValue;
83 }
84
85 public void setColorValue(RGB rgb) {
86 fColorValue= rgb;
87 updateColorImage();
88 }
89
90 public Button getButton() {
91 return fButton;
92 }
93
94 protected void updateColorImage() {
95
96 Display display= fButton.getDisplay();
97
98 GC gc= new GC(fImage);
99 gc.setForeground(display.getSystemColor(SWT.COLOR_BLACK));
100 gc.drawRectangle(0, 2, fExtent.x - 1, fExtent.y - 4);
101
102 if (fColor != null)
103 fColor.dispose();
104
105 fColor= new Color(display, fColorValue);
106 gc.setBackground(fColor);
107 gc.fillRectangle(1, 3, fExtent.x - 2, fExtent.y - 5);
108 gc.dispose();
109
110 fButton.setImage(fImage);
111 }
112
113 protected Point computeImageSize(Control window) {
114 GC gc= new GC(window);
115 Font f= JFaceResources.getFontRegistry().get(JFaceResources.DEFAULT_FONT);
116 gc.setFont(f);
117 int height= gc.getFontMetrics().getHeight();
118 gc.dispose();
119 Point p= new Point(height * 3 - 6, height);
120 return p;
121 }
122 }
123 |
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