Mercurial > projects > dwt2
annotate org.eclipse.ui.forms/src/org/eclipse/ui/internal/forms/widgets/BusyIndicator.d @ 19:52184e4b815c
no more direct tango.core.Thread. Rename JThread to java.lang.Thread.
author | Frank Benoit <benoit@tionex.de> |
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date | Wed, 18 Mar 2009 10:55:25 +0100 |
parents | bc29606a740c |
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1 /******************************************************************************* |
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2 * Copyright (c) 2006, 2007 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 * Stefan Mucke - fix for Bug 156456 |
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11 * Port to the D programming language: |
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12 * Frank Benoit <benoit@tionex.de> |
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13 *******************************************************************************/ |
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14 module org.eclipse.ui.internal.forms.widgets.BusyIndicator; |
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15 |
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16 import org.eclipse.ui.internal.forms.widgets.FormUtil; |
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17 |
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18 import org.eclipse.swt.SWT; |
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19 import org.eclipse.swt.events.PaintEvent; |
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20 import org.eclipse.swt.events.PaintListener; |
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21 import org.eclipse.swt.graphics.GC; |
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22 import org.eclipse.swt.graphics.Image; |
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23 import org.eclipse.swt.graphics.ImageData; |
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24 import org.eclipse.swt.graphics.Point; |
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25 import org.eclipse.swt.graphics.Rectangle; |
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26 import org.eclipse.swt.widgets.Canvas; |
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27 import org.eclipse.swt.widgets.Composite; |
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28 import org.eclipse.swt.widgets.Display; |
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29 // import org.eclipse.core.runtime.FileLocator; |
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30 // import org.eclipse.core.runtime.Path; |
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31 // import org.eclipse.core.runtime.Platform; |
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32 import org.eclipse.jface.resource.ImageDescriptor; |
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33 |
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34 import java.lang.all; |
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35 import java.util.Set; |
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36 |
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37 import tango.util.Convert; |
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38 import java.lang.Thread; |
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39 |
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40 public final class BusyIndicator : Canvas { |
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41 |
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42 alias Canvas.computeSize computeSize; |
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43 |
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44 class BusyThread : Thread { |
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45 Rectangle bounds; |
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46 Display display; |
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47 GC offScreenImageGC; |
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48 Image offScreenImage; |
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49 Image timage; |
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50 bool stop; |
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51 |
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52 private this(Rectangle bounds, Display display, GC offScreenImageGC, Image offScreenImage) { |
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53 this.bounds = bounds; |
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54 this.display = display; |
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55 this.offScreenImageGC = offScreenImageGC; |
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56 this.offScreenImage = offScreenImage; |
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57 } |
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58 |
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59 public override void run() { |
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60 try { |
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61 /* |
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62 * Create an off-screen image to draw on, and fill it with |
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63 * the shell background. |
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64 */ |
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65 FormUtil.setAntialias(offScreenImageGC, SWT.ON); |
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66 display.syncExec(dgRunnable( { |
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67 if (!isDisposed()) |
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68 drawBackground(offScreenImageGC, 0, 0, |
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69 bounds.width, |
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70 bounds.height); |
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71 })); |
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72 if (isDisposed()) |
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73 return; |
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74 |
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75 /* |
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76 * Create the first image and draw it on the off-screen |
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77 * image. |
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78 */ |
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79 int imageDataIndex = 0; |
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80 ImageData imageData; |
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81 synchronized (this.outer) { |
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82 timage = getImage(imageDataIndex); |
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83 imageData = timage.getImageData(); |
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84 offScreenImageGC.drawImage(timage, 0, 0, |
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85 imageData.width, imageData.height, imageData.x, |
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86 imageData.y, imageData.width, imageData.height); |
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87 } |
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88 |
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89 /* |
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90 * Now loop through the images, creating and drawing |
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91 * each one on the off-screen image before drawing it on |
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92 * the shell. |
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93 */ |
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94 while (!stop && !isDisposed() && timage !is null) { |
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95 |
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96 /* |
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97 * Fill with the background color before |
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98 * drawing. |
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99 */ |
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100 display.syncExec(dgRunnable( (ImageData fimageData){ |
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101 if (!isDisposed()) { |
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102 drawBackground(offScreenImageGC, fimageData.x, |
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103 fimageData.y, fimageData.width, |
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104 fimageData.height); |
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105 } |
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106 }, imageData )); |
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107 |
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108 synchronized (this.outer) { |
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109 imageDataIndex = (imageDataIndex + 1) % IMAGE_COUNT; |
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110 timage = getImage(imageDataIndex); |
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111 imageData = timage.getImageData(); |
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112 offScreenImageGC.drawImage(timage, 0, 0, |
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113 imageData.width, imageData.height, |
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114 imageData.x, imageData.y, imageData.width, |
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115 imageData.height); |
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116 } |
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117 |
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118 /* Draw the off-screen image to the shell. */ |
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119 animationImage = offScreenImage; |
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120 display.syncExec(dgRunnable( { |
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121 if (!isDisposed()) |
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122 redraw(); |
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123 })); |
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124 /* |
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125 * Sleep for the specified delay time |
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126 */ |
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127 try { |
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128 Thread.sleep(MILLISECONDS_OF_DELAY); |
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129 } catch (InterruptedException e) { |
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130 ExceptionPrintStackTrace(e); |
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131 } |
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132 |
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133 |
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134 } |
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135 } catch (Exception e) { |
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136 } finally { |
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137 display.syncExec(dgRunnable( { |
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138 if (offScreenImage !is null |
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139 && !offScreenImage.isDisposed()) |
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140 offScreenImage.dispose(); |
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141 if (offScreenImageGC !is null |
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142 && !offScreenImageGC.isDisposed()) |
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143 offScreenImageGC.dispose(); |
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144 })); |
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145 clearImages(); |
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146 } |
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147 if (busyThread is null) |
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148 display.syncExec(dgRunnable( { |
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149 animationImage = null; |
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150 if (!isDisposed()) |
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151 redraw(); |
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152 })); |
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153 } |
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154 |
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155 public void setStop(bool stop) { |
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156 this.stop = stop; |
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157 } |
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158 } |
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159 |
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160 private static const int MARGIN = 0; |
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161 private static const int IMAGE_COUNT = 8; |
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162 private static const int MILLISECONDS_OF_DELAY = 180; |
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163 private Image[] imageCache; |
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164 protected Image image; |
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165 |
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166 protected Image animationImage; |
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167 |
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168 protected BusyThread busyThread; |
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169 |
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170 /** |
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171 * BusyWidget constructor comment. |
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172 * |
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173 * @param parent |
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174 * org.eclipse.swt.widgets.Composite |
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175 * @param style |
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176 * int |
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177 */ |
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178 public this(Composite parent, int style) { |
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179 super(parent, style); |
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180 |
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181 addPaintListener(new class PaintListener { |
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182 public void paintControl(PaintEvent event) { |
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183 onPaint(event); |
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184 } |
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185 }); |
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186 } |
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187 |
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188 public Point computeSize(int wHint, int hHint, bool changed) { |
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189 Point size = new Point(0, 0); |
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190 if (image !is null) { |
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191 Rectangle ibounds = image.getBounds(); |
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192 size.x = ibounds.width; |
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193 size.y = ibounds.height; |
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194 } |
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195 if (isBusy()) { |
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196 Rectangle bounds = getImage(0).getBounds(); |
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197 size.x = Math.max(size.x, bounds.width); |
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198 size.y = Math.max(size.y, bounds.height); |
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199 } |
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200 size.x += MARGIN + MARGIN; |
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201 size.y += MARGIN + MARGIN; |
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202 return size; |
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203 } |
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204 |
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205 /* (non-Javadoc) |
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206 * @see org.eclipse.swt.widgets.Control#forceFocus() |
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207 */ |
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208 public bool forceFocus() { |
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209 return false; |
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210 } |
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211 |
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212 /** |
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213 * Creates a thread to animate the image. |
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214 */ |
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215 protected synchronized void createBusyThread() { |
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216 if (busyThread !is null) |
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217 return; |
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218 |
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219 Rectangle bounds = getImage(0).getBounds(); |
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220 Display display = getDisplay(); |
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221 Image offScreenImage = new Image(display, bounds.width, bounds.height); |
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222 GC offScreenImageGC = new GC(offScreenImage); |
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223 busyThread = new BusyThread(bounds, display, offScreenImageGC, offScreenImage); |
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224 busyThread.setPriority(Thread.NORM_PRIORITY + 2); |
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225 busyThread.setDaemon(true); |
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226 busyThread.start(); |
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227 } |
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228 |
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229 public void dispose() { |
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230 if (busyThread !is null) { |
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231 busyThread.setStop(true); |
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232 busyThread = null; |
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233 } |
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234 super.dispose(); |
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235 } |
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236 |
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237 /** |
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238 * Return the image or <code>null</code>. |
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239 */ |
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240 public Image getImage() { |
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241 return image; |
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242 } |
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243 |
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244 /** |
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245 * Returns true if it is currently busy. |
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246 * |
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247 * @return bool |
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248 */ |
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249 public bool isBusy() { |
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250 return (busyThread !is null); |
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251 } |
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252 |
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253 /* |
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254 * Process the paint event |
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255 */ |
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256 protected void onPaint(PaintEvent event) { |
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257 if (animationImage !is null && animationImage.isDisposed()) { |
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258 animationImage = null; |
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259 } |
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260 Rectangle rect = getClientArea(); |
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261 if (rect.width is 0 || rect.height is 0) |
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262 return; |
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263 |
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264 GC gc = event.gc; |
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265 Image activeImage = animationImage !is null ? animationImage : image; |
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266 if (activeImage !is null) { |
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267 Rectangle ibounds = activeImage.getBounds(); |
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268 gc.drawImage(activeImage, rect.width / 2 - ibounds.width / 2, |
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269 rect.height / 2 - ibounds.height / 2); |
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270 } |
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271 } |
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272 |
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273 /** |
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274 * Sets the indicators busy count up (true) or down (false) one. |
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275 * |
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276 * @param busy |
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277 * bool |
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278 */ |
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279 public synchronized void setBusy(bool busy) { |
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280 if (busy) { |
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281 if (busyThread is null) |
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282 createBusyThread(); |
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283 } else { |
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284 if (busyThread !is null) { |
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285 busyThread.setStop(true); |
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286 busyThread = null; |
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287 } |
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288 } |
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289 } |
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290 |
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291 /** |
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292 * Set the image. The value <code>null</code> clears it. |
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293 */ |
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294 public void setImage(Image image) { |
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295 if (image !is this.image && !isDisposed()) { |
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296 this.image = image; |
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297 redraw(); |
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298 } |
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299 } |
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300 |
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301 |
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302 private ImageDescriptor createImageDescriptor(String relativePath) { |
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303 // Bundle bundle = Platform.getBundle("org.eclipse.ui.forms"); //$NON-NLS-1$ |
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304 // URL url = FileLocator.find(bundle, new Path(relativePath),null); |
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305 // if (url is null) return null; |
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306 // try { |
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307 // url = FileLocator.resolve(url); |
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308 // return ImageDescriptor.createFromURL(url); |
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309 // } catch (IOException e) { |
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310 // return null; |
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311 // } |
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312 return null; |
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313 } |
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314 |
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315 private synchronized Image getImage(int index) { |
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316 if (imageCache is null) { |
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317 imageCache = new Image[IMAGE_COUNT]; |
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318 } |
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319 if (imageCache[index] is null){ |
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320 ImageDescriptor descriptor = createImageDescriptor("$nl$/icons/progress/ani/" ~ to!(String)(index + 1) ~ ".png"); //$NON-NLS-1$ //$NON-NLS-2$ |
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321 imageCache[index] = descriptor.createImage(); |
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322 } |
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323 return imageCache[index]; |
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324 } |
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325 |
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326 private synchronized void clearImages() { |
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327 if (busyThread !is null) |
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328 return; |
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329 if (imageCache !is null) { |
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330 for (int index = 0; index < IMAGE_COUNT; index++) { |
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331 if (imageCache[index] !is null && !imageCache[index].isDisposed()) { |
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332 imageCache[index].dispose(); |
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333 imageCache[index] = null; |
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334 } |
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335 } |
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336 } |
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337 } |
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338 |
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339 } |