Mercurial > projects > dwt-addons
annotate dwtx/ui/internal/forms/widgets/BusyIndicator.d @ 90:7ffeace6c47f
Update 3.4M7 to 3.4
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Sun, 06 Jul 2008 23:30:07 +0200 |
| parents | 26c6c9dfd13c |
| children | 862b05e0334a |
| rev | line source |
|---|---|
| 75 | 1 /******************************************************************************* |
| 2 * Copyright (c) 2006, 2007 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 * Stefan Mucke - fix for Bug 156456 | |
| 11 * Port to the D programming language: | |
| 12 * Frank Benoit <benoit@tionex.de> | |
| 13 *******************************************************************************/ | |
| 14 module dwtx.ui.internal.forms.widgets.BusyIndicator; | |
| 15 | |
| 16 import dwtx.ui.internal.forms.widgets.FormUtil; | |
| 17 | |
| 18 import dwt.DWT; | |
| 19 import dwt.events.PaintEvent; | |
| 20 import dwt.events.PaintListener; | |
| 21 import dwt.graphics.GC; | |
| 22 import dwt.graphics.Image; | |
| 23 import dwt.graphics.ImageData; | |
| 24 import dwt.graphics.Point; | |
| 25 import dwt.graphics.Rectangle; | |
| 26 import dwt.widgets.Canvas; | |
| 27 import dwt.widgets.Composite; | |
| 28 import dwt.widgets.Display; | |
| 90 | 29 // import dwtx.core.runtime.FileLocator; |
| 30 // import dwtx.core.runtime.Path; | |
| 31 // import dwtx.core.runtime.Platform; | |
| 75 | 32 import dwtx.jface.resource.ImageDescriptor; |
| 33 | |
| 34 import dwt.dwthelper.utils; | |
| 35 import dwt.dwthelper.Runnable; | |
| 36 | |
| 37 import tango.util.Convert; | |
| 38 import tango.core.Thread; | |
| 39 | |
| 40 public final class BusyIndicator : Canvas { | |
| 41 | |
|
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26c6c9dfd13c
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parents:
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diff
changeset
|
42 alias Canvas.computeSize computeSize; |
|
26c6c9dfd13c
ui.forms compile, just FormTextModel with xml reimpl left todo
Frank Benoit <benoit@tionex.de>
parents:
76
diff
changeset
|
43 |
| 75 | 44 class BusyThread : Thread { |
| 45 Rectangle bounds; | |
| 46 Display display; | |
| 47 GC offScreenImageGC; | |
| 48 Image offScreenImage; | |
| 49 Image timage; | |
| 50 bool stop; | |
| 51 | |
| 52 private this(Rectangle bounds, Display display, GC offScreenImageGC, Image offScreenImage) { | |
| 53 this.bounds = bounds; | |
| 54 this.display = display; | |
| 55 this.offScreenImageGC = offScreenImageGC; | |
| 56 this.offScreenImage = offScreenImage; | |
| 57 } | |
| 58 | |
| 59 public void run() { | |
| 60 try { | |
| 61 /* | |
| 62 * Create an off-screen image to draw on, and fill it with | |
| 63 * the shell background. | |
| 64 */ | |
| 65 FormUtil.setAntialias(offScreenImageGC, DWT.ON); | |
| 66 display.syncExec(dgRunnable( { | |
| 67 if (!isDisposed()) | |
| 68 drawBackground(offScreenImageGC, 0, 0, | |
| 69 bounds.width, | |
| 70 bounds.height); | |
| 71 })); | |
| 72 if (isDisposed()) | |
| 73 return; | |
| 74 | |
| 75 /* | |
| 76 * Create the first image and draw it on the off-screen | |
| 77 * image. | |
| 78 */ | |
| 79 int imageDataIndex = 0; | |
| 80 ImageData imageData; | |
| 81 synchronized (this.outer) { | |
| 82 timage = getImage(imageDataIndex); | |
| 83 imageData = timage.getImageData(); | |
| 84 offScreenImageGC.drawImage(timage, 0, 0, | |
| 85 imageData.width, imageData.height, imageData.x, | |
| 86 imageData.y, imageData.width, imageData.height); | |
| 87 } | |
| 88 | |
| 89 /* | |
| 90 * Now loop through the images, creating and drawing | |
| 91 * each one on the off-screen image before drawing it on | |
| 92 * the shell. | |
| 93 */ | |
| 94 while (!stop && !isDisposed() && timage !is null) { | |
| 95 | |
| 96 /* | |
| 97 * Fill with the background color before | |
| 98 * drawing. | |
| 99 */ | |
| 100 display.syncExec(dgRunnable( (ImageData fimageData){ | |
| 101 if (!isDisposed()) { | |
| 102 drawBackground(offScreenImageGC, fimageData.x, | |
| 103 fimageData.y, fimageData.width, | |
| 104 fimageData.height); | |
| 105 } | |
| 106 }, imageData )); | |
| 107 | |
| 108 synchronized (this.outer) { | |
| 109 imageDataIndex = (imageDataIndex + 1) % IMAGE_COUNT; | |
| 110 timage = getImage(imageDataIndex); | |
| 111 imageData = timage.getImageData(); | |
| 112 offScreenImageGC.drawImage(timage, 0, 0, | |
| 113 imageData.width, imageData.height, | |
| 114 imageData.x, imageData.y, imageData.width, | |
| 115 imageData.height); | |
| 116 } | |
| 117 | |
| 118 /* Draw the off-screen image to the shell. */ | |
| 119 animationImage = offScreenImage; | |
| 120 display.syncExec(dgRunnable( { | |
| 121 if (!isDisposed()) | |
| 122 redraw(); | |
| 123 })); | |
| 124 /* | |
| 125 * Sleep for the specified delay time | |
| 126 */ | |
| 127 try { | |
| 128 Thread.sleep(MILLISECONDS_OF_DELAY/1000.0); | |
| 129 } catch (InterruptedException e) { | |
| 76 | 130 ExceptionPrintStackTrace(e); |
| 75 | 131 } |
| 132 | |
| 133 | |
| 134 } | |
| 135 } catch (Exception e) { | |
| 136 } finally { | |
| 137 display.syncExec(dgRunnable( { | |
| 138 if (offScreenImage !is null | |
| 139 && !offScreenImage.isDisposed()) | |
| 140 offScreenImage.dispose(); | |
| 141 if (offScreenImageGC !is null | |
| 142 && !offScreenImageGC.isDisposed()) | |
| 143 offScreenImageGC.dispose(); | |
| 144 })); | |
| 145 clearImages(); | |
| 146 } | |
| 147 if (busyThread is null) | |
| 148 display.syncExec(dgRunnable( { | |
| 149 animationImage = null; | |
| 150 if (!isDisposed()) | |
| 151 redraw(); | |
| 152 })); | |
| 153 } | |
| 154 | |
| 155 public void setStop(bool stop) { | |
| 156 this.stop = stop; | |
| 157 } | |
| 158 } | |
| 159 | |
| 160 private static const int MARGIN = 0; | |
| 161 private static const int IMAGE_COUNT = 8; | |
| 162 private static const int MILLISECONDS_OF_DELAY = 180; | |
| 163 private Image[] imageCache; | |
| 164 protected Image image; | |
| 165 | |
| 166 protected Image animationImage; | |
| 167 | |
| 168 protected BusyThread busyThread; | |
| 169 | |
| 170 /** | |
| 171 * BusyWidget constructor comment. | |
| 172 * | |
| 173 * @param parent | |
| 174 * dwt.widgets.Composite | |
| 175 * @param style | |
| 176 * int | |
| 177 */ | |
| 178 public this(Composite parent, int style) { | |
| 179 super(parent, style); | |
| 180 | |
| 181 addPaintListener(new class PaintListener { | |
| 182 public void paintControl(PaintEvent event) { | |
| 183 onPaint(event); | |
| 184 } | |
| 185 }); | |
| 186 } | |
| 187 | |
| 188 public Point computeSize(int wHint, int hHint, bool changed) { | |
| 189 Point size = new Point(0, 0); | |
| 190 if (image !is null) { | |
| 191 Rectangle ibounds = image.getBounds(); | |
| 192 size.x = ibounds.width; | |
| 193 size.y = ibounds.height; | |
| 194 } | |
| 195 if (isBusy()) { | |
| 196 Rectangle bounds = getImage(0).getBounds(); | |
| 197 size.x = Math.max(size.x, bounds.width); | |
| 198 size.y = Math.max(size.y, bounds.height); | |
| 199 } | |
| 200 size.x += MARGIN + MARGIN; | |
| 201 size.y += MARGIN + MARGIN; | |
| 202 return size; | |
| 203 } | |
| 204 | |
| 205 /* (non-Javadoc) | |
| 206 * @see dwt.widgets.Control#forceFocus() | |
| 207 */ | |
| 208 public bool forceFocus() { | |
| 209 return false; | |
| 210 } | |
| 211 | |
| 212 /** | |
| 213 * Creates a thread to animate the image. | |
| 214 */ | |
| 215 protected synchronized void createBusyThread() { | |
| 216 if (busyThread !is null) | |
| 217 return; | |
| 218 | |
| 219 Rectangle bounds = getImage(0).getBounds(); | |
| 220 Display display = getDisplay(); | |
| 221 Image offScreenImage = new Image(display, bounds.width, bounds.height); | |
| 222 GC offScreenImageGC = new GC(offScreenImage); | |
| 223 busyThread = new BusyThread(bounds, display, offScreenImageGC, offScreenImage); | |
| 76 | 224 busyThread.priority((Thread.PRIORITY_MIN + Thread.PRIORITY_MAX )/2 + 2); |
| 225 busyThread.isDaemon(true); | |
| 75 | 226 busyThread.start(); |
| 227 } | |
| 228 | |
| 229 public void dispose() { | |
| 230 if (busyThread !is null) { | |
| 231 busyThread.setStop(true); | |
| 232 busyThread = null; | |
| 233 } | |
| 234 super.dispose(); | |
| 235 } | |
| 236 | |
| 237 /** | |
| 238 * Return the image or <code>null</code>. | |
| 239 */ | |
| 240 public Image getImage() { | |
| 241 return image; | |
| 242 } | |
| 243 | |
| 244 /** | |
| 245 * Returns true if it is currently busy. | |
| 246 * | |
| 247 * @return bool | |
| 248 */ | |
| 249 public bool isBusy() { | |
| 250 return (busyThread !is null); | |
| 251 } | |
| 252 | |
| 253 /* | |
| 254 * Process the paint event | |
| 255 */ | |
| 256 protected void onPaint(PaintEvent event) { | |
| 257 if (animationImage !is null && animationImage.isDisposed()) { | |
| 258 animationImage = null; | |
| 259 } | |
| 260 Rectangle rect = getClientArea(); | |
| 261 if (rect.width is 0 || rect.height is 0) | |
| 262 return; | |
| 263 | |
| 264 GC gc = event.gc; | |
| 265 Image activeImage = animationImage !is null ? animationImage : image; | |
| 266 if (activeImage !is null) { | |
| 267 Rectangle ibounds = activeImage.getBounds(); | |
| 268 gc.drawImage(activeImage, rect.width / 2 - ibounds.width / 2, | |
| 269 rect.height / 2 - ibounds.height / 2); | |
| 270 } | |
| 271 } | |
| 272 | |
| 273 /** | |
| 274 * Sets the indicators busy count up (true) or down (false) one. | |
| 275 * | |
| 276 * @param busy | |
| 277 * bool | |
| 278 */ | |
| 279 public synchronized void setBusy(bool busy) { | |
| 280 if (busy) { | |
| 281 if (busyThread is null) | |
| 282 createBusyThread(); | |
| 283 } else { | |
| 284 if (busyThread !is null) { | |
| 285 busyThread.setStop(true); | |
| 286 busyThread = null; | |
| 287 } | |
| 288 } | |
| 289 } | |
| 290 | |
| 291 /** | |
| 292 * Set the image. The value <code>null</code> clears it. | |
| 293 */ | |
| 294 public void setImage(Image image) { | |
| 295 if (image !is this.image && !isDisposed()) { | |
| 296 this.image = image; | |
| 297 redraw(); | |
| 298 } | |
| 299 } | |
| 300 | |
| 301 | |
| 302 private ImageDescriptor createImageDescriptor(String relativePath) { | |
| 90 | 303 // Bundle bundle = Platform.getBundle("dwtx.ui.forms"); //$NON-NLS-1$ |
| 304 // URL url = FileLocator.find(bundle, new Path(relativePath),null); | |
| 305 // if (url is null) return null; | |
| 306 // try { | |
| 307 // url = FileLocator.resolve(url); | |
| 308 // return ImageDescriptor.createFromURL(url); | |
| 309 // } catch (IOException e) { | |
| 310 // return null; | |
| 311 // } | |
| 75 | 312 return null; |
| 313 } | |
| 314 | |
| 315 private synchronized Image getImage(int index) { | |
| 316 if (imageCache is null) { | |
| 317 imageCache = new Image[IMAGE_COUNT]; | |
| 318 } | |
| 319 if (imageCache[index] is null){ | |
| 320 ImageDescriptor descriptor = createImageDescriptor("$nl$/icons/progress/ani/" ~ to!(String)(index + 1) ~ ".png"); //$NON-NLS-1$ //$NON-NLS-2$ | |
| 321 imageCache[index] = descriptor.createImage(); | |
| 322 } | |
| 323 return imageCache[index]; | |
| 324 } | |
| 325 | |
| 326 private synchronized void clearImages() { | |
| 327 if (busyThread !is null) | |
| 328 return; | |
| 329 if (imageCache !is null) { | |
| 330 for (int index = 0; index < IMAGE_COUNT; index++) { | |
| 331 if (imageCache[index] !is null && !imageCache[index].isDisposed()) { | |
| 332 imageCache[index].dispose(); | |
| 333 imageCache[index] = null; | |
| 334 } | |
| 335 } | |
| 336 } | |
| 337 } | |
| 338 | |
| 339 } |