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comparison org.eclipse.jface/src/org/eclipse/jface/viewers/ColorCellEditor.d @ 12:bc29606a740c

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Added dwt-addons in original directory structure of eclipse.org
author Frank Benoit <benoit@tionex.de>
date Sat, 14 Mar 2009 18:23:29 +0100
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children 6f068362a363
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11:43904fec5dca 12:bc29606a740c
1 /*******************************************************************************
2 * Copyright (c) 2000, 2008 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
7 *
8 * Contributors:
9 * IBM Corporation - initial API and implementation
10 * Port to the D programming language:
11 * Frank Benoit <benoit@tionex.de>
12 *******************************************************************************/
13 module org.eclipse.jface.viewers.ColorCellEditor;
14
15 import org.eclipse.jface.viewers.DialogCellEditor;
16
17 import org.eclipse.swt.SWT;
18 import org.eclipse.swt.custom.TableTree;
19 import org.eclipse.swt.graphics.Color;
20 import org.eclipse.swt.graphics.FontMetrics;
21 import org.eclipse.swt.graphics.GC;
22 import org.eclipse.swt.graphics.Image;
23 import org.eclipse.swt.graphics.ImageData;
24 import org.eclipse.swt.graphics.PaletteData;
25 import org.eclipse.swt.graphics.Point;
26 import org.eclipse.swt.graphics.RGB;
27 import org.eclipse.swt.graphics.Rectangle;
28 import org.eclipse.swt.widgets.ColorDialog;
29 import org.eclipse.swt.widgets.Composite;
30 import org.eclipse.swt.widgets.Control;
31 import org.eclipse.swt.widgets.Label;
32 import org.eclipse.swt.widgets.Layout;
33 import org.eclipse.swt.widgets.Table;
34 import org.eclipse.swt.widgets.Tree;
35
36 import java.lang.all;
37 import java.util.Set;
38 import tango.text.convert.Format;
39
40 /**
41 * A cell editor that manages a color field.
42 * The cell editor's value is the color (an SWT <code>RBG</code>).
43 * <p>
44 * This class may be instantiated; it is not intended to be subclassed.
45 * </p>
46 * @noextend This class is not intended to be subclassed by clients.
47 */
48 public class ColorCellEditor : DialogCellEditor {
49
50 /**
51 * The default extent in pixels.
52 */
53 private static const int DEFAULT_EXTENT = 16;
54
55 /**
56 * Gap between between image and text in pixels.
57 */
58 private static const int GAP = 6;
59
60 /**
61 * The composite widget containing the color and RGB label widgets
62 */
63 private Composite composite;
64
65 /**
66 * The label widget showing the current color.
67 */
68 private Label colorLabel;
69
70 /**
71 * The label widget showing the RGB values.
72 */
73 private Label rgbLabel;
74
75 /**
76 * The image.
77 */
78 private Image image;
79
80 /**
81 * Internal class for laying out this cell editor.
82 */
83 private class ColorCellLayout : Layout {
84 public override Point computeSize(Composite editor, int wHint, int hHint,
85 bool force) {
86 if (wHint !is SWT.DEFAULT && hHint !is SWT.DEFAULT) {
87 return new Point(wHint, hHint);
88 }
89 Point colorSize = colorLabel.computeSize(SWT.DEFAULT, SWT.DEFAULT,
90 force);
91 Point rgbSize = rgbLabel.computeSize(SWT.DEFAULT, SWT.DEFAULT,
92 force);
93 return new Point(colorSize.x + GAP + rgbSize.x, Math.max(
94 colorSize.y, rgbSize.y));
95 }
96
97 public override void layout(Composite editor, bool force) {
98 Rectangle bounds = editor.getClientArea();
99 Point colorSize = colorLabel.computeSize(SWT.DEFAULT, SWT.DEFAULT,
100 force);
101 Point rgbSize = rgbLabel.computeSize(SWT.DEFAULT, SWT.DEFAULT,
102 force);
103 int ty = (bounds.height - rgbSize.y) / 2;
104 if (ty < 0) {
105 ty = 0;
106 }
107 colorLabel.setBounds(-1, 0, colorSize.x, colorSize.y);
108 rgbLabel.setBounds(colorSize.x + GAP - 1, ty, bounds.width
109 - colorSize.x - GAP, bounds.height);
110 }
111 }
112
113 /**
114 * Creates a new color cell editor parented under the given control.
115 * The cell editor value is black (<code>RGB(0,0,0)</code>) initially, and has no
116 * validator.
117 *
118 * @param parent the parent control
119 */
120 public this(Composite parent) {
121 this(parent, SWT.NONE);
122 }
123
124 /**
125 * Creates a new color cell editor parented under the given control.
126 * The cell editor value is black (<code>RGB(0,0,0)</code>) initially, and has no
127 * validator.
128 *
129 * @param parent the parent control
130 * @param style the style bits
131 * @since 2.1
132 */
133 public this(Composite parent, int style) {
134 super(parent, style);
135 doSetValue(new RGB(0, 0, 0));
136 }
137
138 /**
139 * Creates and returns the color image data for the given control
140 * and RGB value. The image's size is either the control's item extent
141 * or the cell editor's default extent, which is 16 pixels square.
142 *
143 * @param w the control
144 * @param color the color
145 */
146 private ImageData createColorImage(Control w, RGB color) {
147
148 GC gc = new GC(w);
149 FontMetrics fm = gc.getFontMetrics();
150 int size = fm.getAscent();
151 gc.dispose();
152
153 int indent = 6;
154 int extent = DEFAULT_EXTENT;
155 if ( auto i = cast(Table)w ) {
156 extent = i.getItemHeight() - 1;
157 } else if ( auto i = cast(Tree)w ) {
158 extent = i.getItemHeight() - 1;
159 } else if ( auto i = cast(TableTree)w ) {
160 extent = i.getItemHeight() - 1;
161 }
162
163 if (size > extent) {
164 size = extent;
165 }
166
167 int width = indent + size;
168 int height = extent;
169
170 int xoffset = indent;
171 int yoffset = (height - size) / 2;
172
173 RGB black = new RGB(0, 0, 0);
174 PaletteData dataPalette = new PaletteData([ black, black,
175 color ]);
176 ImageData data = new ImageData(width, height, 4, dataPalette);
177 data.transparentPixel = 0;
178
179 int end = size - 1;
180 for (int y = 0; y < size; y++) {
181 for (int x = 0; x < size; x++) {
182 if (x is 0 || y is 0 || x is end || y is end) {
183 data.setPixel(x + xoffset, y + yoffset, 1);
184 } else {
185 data.setPixel(x + xoffset, y + yoffset, 2);
186 }
187 }
188 }
189
190 return data;
191 }
192
193 /* (non-Javadoc)
194 * Method declared on DialogCellEditor.
195 */
196 protected override Control createContents(Composite cell) {
197 Color bg = cell.getBackground();
198 composite = new Composite(cell, getStyle());
199 composite.setBackground(bg);
200 composite.setLayout(new ColorCellLayout());
201 colorLabel = new Label(composite, SWT.LEFT);
202 colorLabel.setBackground(bg);
203 rgbLabel = new Label(composite, SWT.LEFT);
204 rgbLabel.setBackground(bg);
205 rgbLabel.setFont(cell.getFont());
206 return composite;
207 }
208
209 /* (non-Javadoc)
210 * Method declared on CellEditor.
211 */
212 public override void dispose() {
213 if (image !is null) {
214 image.dispose();
215 image = null;
216 }
217 super.dispose();
218 }
219
220 /* (non-Javadoc)
221 * Method declared on DialogCellEditor.
222 */
223 protected override Object openDialogBox(Control cellEditorWindow) {
224 ColorDialog dialog = new ColorDialog(cellEditorWindow.getShell());
225 Object value = getValue();
226 if (value !is null) {
227 dialog.setRGB(cast(RGB) value);
228 }
229 value = dialog.open();
230 return dialog.getRGB();
231 }
232
233 /* (non-Javadoc)
234 * Method declared on DialogCellEditor.
235 */
236 protected override void updateContents(Object value) {
237 RGB rgb = cast(RGB) value;
238 // XXX: We don't have a value the first time this method is called".
239 if (rgb is null) {
240 rgb = new RGB(0, 0, 0);
241 }
242 // XXX: Workaround for 1FMQ0P3: SWT:ALL - TableItem.setImage doesn't work if using the identical image."
243 if (image !is null) {
244 image.dispose();
245 }
246
247 ImageData id = createColorImage(colorLabel.getParent().getParent(), rgb);
248 ImageData mask = id.getTransparencyMask();
249 image = new Image(colorLabel.getDisplay(), id, mask);
250 colorLabel.setImage(image);
251
252 rgbLabel
253 .setText( Format( "({},{},{})", rgb.red, rgb.green, rgb.blue));//$NON-NLS-4$//$NON-NLS-3$//$NON-NLS-2$//$NON-NLS-1$
254 }
255 }