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annotate snippets/styledtext/Snippet217.d @ 155:04d05db6dca4

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styledtext: Snippet211, Snippet213, Snippet217, Snippet218, Snippet222, Snippet244
author yidabu <yidabu@gmail.com>
date Fri, 22 Aug 2008 07:27:56 +0800
parents
children 8d6ec2b0357c
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rev   line source
155
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2004 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * yidabu at gmail dot com ( D China http://www.d-programming-language-china.org/ )
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12 *******************************************************************************/
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13
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14 module styledtext.Snippet217;
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15 /**
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16 * StyledText snippet: embed controls
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17 *
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18 * For a list of all SWT example snippets see
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19 * http://www.eclipse.org/swt/snippets/
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20 *
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21 * @since 3.2
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22 */
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23
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24 import dwt.DWT;
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25 import dwt.custom.StyledText;
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26 import dwt.custom.StyleRange;
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27 import dwt.custom.PaintObjectEvent;
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28 import dwt.custom.PaintObjectListener;
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29 import dwt.layout.GridData;
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30 import dwt.layout.GridLayout;
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31 import dwt.widgets.Display;
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32 import dwt.widgets.Shell;
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33 import dwt.widgets.Control;
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34 import dwt.widgets.Button;
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35 import dwt.widgets.Combo;
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36 import dwt.widgets.Event;
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37 import dwt.widgets.Listener;
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38 import dwt.graphics.FontData;
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39 import dwt.graphics.Font;
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40 import dwt.graphics.Rectangle;
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41 import dwt.graphics.Point;
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42 import dwt.graphics.GC;
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43 import dwt.graphics.Image;
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44 import dwt.graphics.GlyphMetrics;
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45
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46 import dwt.dwthelper.utils;
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47 version(JIVE){
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48 import jive.stacktrace;
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49 }
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50
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51 void main() {
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52 static StyledText styledText;
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53 static String text =
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54 "This snippet shows how to embed widgets in a StyledText.\n"
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55 "Here is one: \uFFFC, and here is another: \uFFFC.";
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56 static int[] offsets;
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57 static Control[] controls;
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58 static int MARGIN = 5;
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59
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60 void addControl(Control control, int offset) {
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61 StyleRange style = new StyleRange ();
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62 style.start = offset;
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63 style.length = 1;
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64 control.pack();
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65 Rectangle rect = control.getBounds();
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66 int ascent = 2*rect.height/3;
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67 int descent = rect.height - ascent;
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68 style.metrics = new GlyphMetrics(ascent + MARGIN, descent + MARGIN, rect.width + 2*MARGIN);
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69 styledText.setStyleRange(style);
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70 }
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71
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72
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73 Display display = new Display();
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74 Font font = new Font(display, "Tahoma", 32f, DWT.NORMAL);
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75 Shell shell = new Shell(display);
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76 shell.setLayout(new GridLayout());
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77 styledText = new StyledText(shell, DWT.WRAP | DWT.BORDER);
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78 styledText.setFont(font);
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79 styledText.setLayoutData(new GridData(DWT.FILL, DWT.FILL, true, true));
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80 styledText.setText(text);
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81 controls = new Control[2];
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82 Button button = new Button(styledText, DWT.PUSH);
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83 button.setText("Button 1");
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84 controls[0] = button;
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85 Combo combo = new Combo(styledText, DWT.NONE);
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86 combo.add("item 1");
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87 combo.add("another item");
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88 controls[1] = combo;
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89 offsets = new int[controls.length];
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90 int lastOffset = 0;
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91 for (int i = 0; i < controls.length; i++) {
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92 int offset = text.indexOf("\uFFFC", lastOffset);
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93 offsets[i] = offset;
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94 addControl(controls[i], offsets[i]);
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95 lastOffset = offset + 1;
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96 }
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97
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98 void onVerify(Event e) {
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99 int start = e.start;
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100 int replaceCharCount = e.end - e.start;
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101 int newCharCount = e.text.length;
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102 for (int i = 0; i < offsets.length; i++) {
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103 int offset = offsets[i];
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104 if (start <= offset && offset < start + replaceCharCount) {
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105 // this widget is being deleted from the text
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106 if (controls[i] !is null && !controls[i].isDisposed()) {
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107 controls[i].dispose();
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108 controls[i] = null;
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109 }
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110 offset = -1;
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111 }
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112 if (offset != -1 && offset >= start) offset += newCharCount - replaceCharCount;
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113 offsets[i] = offset;
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114 }
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115 }
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116 // use a verify listener to keep the offsets up to date
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117 styledText.addListener(DWT.Verify, dgListener(&onVerify));
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118
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119 // reposition widgets on paint event
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120 styledText.addPaintObjectListener(new class(offsets) PaintObjectListener {
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121 int[] offsets;
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122 this(int[] offsets_) {
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123 this.offsets = offsets_;
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124 }
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125 public void paintObject(PaintObjectEvent event) {
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126 StyleRange style = event.style;
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127 int start = style.start;
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128 for (int i = 0; i < offsets.length; i++) {
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129 int offset = offsets[i];
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130 if (start == offset) {
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131 Point pt = controls[i].getSize();
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132 int x = event.x + MARGIN;
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133 int y = event.y + event.ascent - 2*pt.y/3;
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134 controls[i].setLocation(x, y);
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135 break;
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136 }
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137 }
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138 }
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139 });
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140
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141 shell.setSize(400, 400);
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142 shell.open();
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143 while (!shell.isDisposed()) {
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144 if (!display.readAndDispatch())
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145 display.sleep();
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146 }
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147 font.dispose();
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148 display.dispose();
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149 }