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comparison org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet217.d @ 28:69b1fa94a4a8

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Added SWT snippets
author Frank Benoit <benoit@tionex.de>
date Sun, 22 Mar 2009 15:17:04 +0100
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27:1bf55a6eb092 28:69b1fa94a4a8
1 /*******************************************************************************
2 * Copyright (c) 2000, 2004 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 * yidabu at gmail dot com ( D China http://www.d-programming-language-china.org/ )
12 *******************************************************************************/
13
14 module org.eclipse.swt.snippets.Snippet217;
15 /**
16 * StyledText snippet: embed controls
17 *
18 * For a list of all SWT example snippets see
19 * http://www.eclipse.org/swt/snippets/
20 *
21 * @since 3.2
22 */
23
24 import org.eclipse.swt.SWT;
25 import org.eclipse.swt.custom.StyledText;
26 import org.eclipse.swt.custom.StyleRange;
27 import org.eclipse.swt.custom.PaintObjectEvent;
28 import org.eclipse.swt.custom.PaintObjectListener;
29 import org.eclipse.swt.layout.GridData;
30 import org.eclipse.swt.layout.GridLayout;
31 import org.eclipse.swt.widgets.Display;
32 import org.eclipse.swt.widgets.Shell;
33 import org.eclipse.swt.widgets.Control;
34 import org.eclipse.swt.widgets.Button;
35 import org.eclipse.swt.widgets.Combo;
36 import org.eclipse.swt.widgets.Event;
37 import org.eclipse.swt.widgets.Listener;
38 import org.eclipse.swt.graphics.FontData;
39 import org.eclipse.swt.graphics.Font;
40 import org.eclipse.swt.graphics.Rectangle;
41 import org.eclipse.swt.graphics.Point;
42 import org.eclipse.swt.graphics.GC;
43 import org.eclipse.swt.graphics.Image;
44 import org.eclipse.swt.graphics.GlyphMetrics;
45
46 import java.lang.all;
47 version(JIVE){
48 import jive.stacktrace;
49 }
50
51 const char[] OBJ_MARKER = "\uFFFC";
52 void main() {
53 static StyledText styledText;
54 static String text =
55 "This snippet shows how to embed widgets in a StyledText.\n"
56 "Here is one: " ~ OBJ_MARKER ~ ", and here is another: " ~ OBJ_MARKER ~ ".";
57 static int[] offsets;
58 static Control[] controls;
59 static int MARGIN = 5;
60
61 void addControl(Control control, int offset) {
62 StyleRange style = new StyleRange ();
63 style.start = offset;
64 style.length = OBJ_MARKER.length;
65 control.pack();
66 Rectangle rect = control.getBounds();
67 int ascent = 2*rect.height/3;
68 int descent = rect.height - ascent;
69 style.metrics = new GlyphMetrics(ascent + MARGIN, descent + MARGIN, rect.width + 2*MARGIN);
70 styledText.setStyleRange(style);
71 }
72
73
74 Display display = new Display();
75 Font font = new Font(display, "Tahoma", 32f, SWT.NORMAL);
76 Shell shell = new Shell(display);
77 shell.setLayout(new GridLayout());
78 styledText = new StyledText(shell, SWT.WRAP | DWT.BORDER);
79 styledText.setFont(font);
80 styledText.setLayoutData(new GridData(SWT.FILL, DWT.FILL, true, true));
81 styledText.setText(text);
82 controls = new Control[2];
83 Button button = new Button(styledText, SWT.PUSH);
84 button.setText("Button 1");
85 controls[0] = button;
86 Combo combo = new Combo(styledText, SWT.NONE);
87 combo.add("item 1");
88 combo.add("another item");
89 controls[1] = combo;
90 offsets = new int[controls.length];
91 int lastOffset = 0;
92 for (int i = 0; i < controls.length; i++) {
93 int offset = text.indexOf( OBJ_MARKER, lastOffset);
94 offsets[i] = offset;
95 addControl(controls[i], offsets[i]);
96 lastOffset = offset + OBJ_MARKER.length;
97 }
98
99 void onVerify(Event e) {
100 int start = e.start;
101 int replaceCharCount = e.end - e.start;
102 int newCharCount = e.text.length;
103 for (int i = 0; i < offsets.length; i++) {
104 int offset = offsets[i];
105 if (start <= offset && offset < start + replaceCharCount) {
106 // this widget is being deleted from the text
107 if (controls[i] !is null && !controls[i].isDisposed()) {
108 controls[i].dispose();
109 controls[i] = null;
110 }
111 offset = -1;
112 }
113 if (offset != -1 && offset >= start) offset += newCharCount - replaceCharCount;
114 offsets[i] = offset;
115 }
116 }
117 // use a verify listener to keep the offsets up to date
118 styledText.addListener(SWT.Verify, dgListener(&onVerify));
119
120 // reposition widgets on paint event
121 styledText.addPaintObjectListener(new class(offsets) PaintObjectListener {
122 int[] offsets;
123 this(int[] offsets_) {
124 this.offsets = offsets_;
125 }
126 public void paintObject(PaintObjectEvent event) {
127 StyleRange style = event.style;
128 int start = style.start;
129 for (int i = 0; i < offsets.length; i++) {
130 int offset = offsets[i];
131 if (start == offset) {
132 Point pt = controls[i].getSize();
133 int x = event.x + MARGIN;
134 int y = event.y + event.ascent - 2*pt.y/3;
135 controls[i].setLocation(x, y);
136 break;
137 }
138 }
139 }
140 });
141
142 shell.setSize(400, 400);
143 shell.open();
144 while (!shell.isDisposed()) {
145 if (!display.readAndDispatch())
146 display.sleep();
147 }
148 font.dispose();
149 display.dispose();
150 }