|
1
11 package org.eclipse.ant.internal.ui.preferences;
12
13
14 import org.eclipse.swt.SWT;
15 import org.eclipse.swt.events.DisposeEvent;
16 import org.eclipse.swt.events.DisposeListener;
17 import org.eclipse.swt.events.SelectionAdapter;
18 import org.eclipse.swt.events.SelectionEvent;
19 import org.eclipse.swt.graphics.Color;
20 import org.eclipse.swt.graphics.Font;
21 import org.eclipse.swt.graphics.GC;
22 import org.eclipse.swt.graphics.Image;
23 import org.eclipse.swt.graphics.Point;
24 import org.eclipse.swt.graphics.RGB;
25 import org.eclipse.swt.widgets.Button;
26 import org.eclipse.swt.widgets.ColorDialog;
27 import org.eclipse.swt.widgets.Composite;
28 import org.eclipse.swt.widgets.Control;
29 import org.eclipse.swt.widgets.Display;
30
31 import org.eclipse.jface.resource.JFaceResources;
32
33
36 public class ColorEditor {
37
38 private Point fExtent;
39 private Image fImage;
40 private RGB fColorValue;
41 private Color fColor;
42 private Button fButton;
43
44 public ColorEditor(Composite parent) {
45
46 fButton= new Button(parent, SWT.PUSH);
47 fExtent= computeImageSize(parent);
48 fImage= new Image(parent.getDisplay(), fExtent.x, fExtent.y);
49
50 GC gc= new GC(fImage);
51 gc.setBackground(fButton.getBackground());
52 gc.fillRectangle(0, 0, fExtent.x, fExtent.y);
53 gc.dispose();
54
55 fButton.setImage(fImage);
56 fButton.addSelectionListener(new SelectionAdapter() {
57 public void widgetSelected(SelectionEvent event) {
58 ColorDialog colorDialog= new ColorDialog(fButton.getShell());
59 colorDialog.setRGB(fColorValue);
60 RGB newColor = colorDialog.open();
61 if (newColor != null) {
62 fColorValue= newColor;
63 updateColorImage();
64 }
65 }
66 });
67
68 fButton.addDisposeListener(new DisposeListener() {
69 public void widgetDisposed(DisposeEvent event) {
70 if (fImage != null) {
71 fImage.dispose();
72 fImage= null;
73 }
74 if (fColor != null) {
75 fColor.dispose();
76 fColor= null;
77 }
78 }
79 });
80 }
81
82 public RGB getColorValue() {
83 return fColorValue;
84 }
85
86 public void setColorValue(RGB rgb) {
87 fColorValue= rgb;
88 updateColorImage();
89 }
90
91 public Button getButton() {
92 return fButton;
93 }
94
95 protected void updateColorImage() {
96
97 Display display= fButton.getDisplay();
98
99 GC gc= new GC(fImage);
100 gc.setForeground(display.getSystemColor(SWT.COLOR_BLACK));
101 gc.drawRectangle(0, 2, fExtent.x - 1, fExtent.y - 4);
102
103 if (fColor != null)
104 fColor.dispose();
105
106 fColor= new Color(display, fColorValue);
107 gc.setBackground(fColor);
108 gc.fillRectangle(1, 3, fExtent.x - 2, fExtent.y - 5);
109 gc.dispose();
110
111 fButton.setImage(fImage);
112 }
113
114 protected Point computeImageSize(Control window) {
115 GC gc= new GC(window);
116 Font f= JFaceResources.getFontRegistry().get(JFaceResources.DEFAULT_FONT);
117 gc.setFont(f);
118 int height= gc.getFontMetrics().getHeight();
119 gc.dispose();
120 Point p= new Point(height * 3 - 6, height);
121 return p;
122 }
123 }
124 |
Popular Tags |
Java API By Example, From Geeks To Geeks.