Mercurial > projects > dwt-addons
annotate dwtx/ui/internal/forms/widgets/BusyIndicator.d @ 77:26c6c9dfd13c
ui.forms compile, just FormTextModel with xml reimpl left todo
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Sat, 24 May 2008 06:59:31 +0200 |
| parents | e193036d82c9 |
| children | 7ffeace6c47f |
| 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; | |
| 29 import dwtx.jface.resource.ImageDescriptor; | |
| 30 | |
| 31 import dwt.dwthelper.utils; | |
| 32 import dwt.dwthelper.Runnable; | |
| 33 | |
| 34 import tango.util.Convert; | |
| 35 import tango.core.Thread; | |
| 36 | |
| 37 public final class BusyIndicator : Canvas { | |
| 38 | |
|
77
26c6c9dfd13c
ui.forms compile, just FormTextModel with xml reimpl left todo
Frank Benoit <benoit@tionex.de>
parents:
76
diff
changeset
|
39 alias Canvas.computeSize computeSize; |
|
26c6c9dfd13c
ui.forms compile, just FormTextModel with xml reimpl left todo
Frank Benoit <benoit@tionex.de>
parents:
76
diff
changeset
|
40 |
| 75 | 41 class BusyThread : Thread { |
| 42 Rectangle bounds; | |
| 43 Display display; | |
| 44 GC offScreenImageGC; | |
| 45 Image offScreenImage; | |
| 46 Image timage; | |
| 47 bool stop; | |
| 48 | |
| 49 private this(Rectangle bounds, Display display, GC offScreenImageGC, Image offScreenImage) { | |
| 50 this.bounds = bounds; | |
| 51 this.display = display; | |
| 52 this.offScreenImageGC = offScreenImageGC; | |
| 53 this.offScreenImage = offScreenImage; | |
| 54 } | |
| 55 | |
| 56 public void run() { | |
| 57 try { | |
| 58 /* | |
| 59 * Create an off-screen image to draw on, and fill it with | |
| 60 * the shell background. | |
| 61 */ | |
| 62 FormUtil.setAntialias(offScreenImageGC, DWT.ON); | |
| 63 display.syncExec(dgRunnable( { | |
| 64 if (!isDisposed()) | |
| 65 drawBackground(offScreenImageGC, 0, 0, | |
| 66 bounds.width, | |
| 67 bounds.height); | |
| 68 })); | |
| 69 if (isDisposed()) | |
| 70 return; | |
| 71 | |
| 72 /* | |
| 73 * Create the first image and draw it on the off-screen | |
| 74 * image. | |
| 75 */ | |
| 76 int imageDataIndex = 0; | |
| 77 ImageData imageData; | |
| 78 synchronized (this.outer) { | |
| 79 timage = getImage(imageDataIndex); | |
| 80 imageData = timage.getImageData(); | |
| 81 offScreenImageGC.drawImage(timage, 0, 0, | |
| 82 imageData.width, imageData.height, imageData.x, | |
| 83 imageData.y, imageData.width, imageData.height); | |
| 84 } | |
| 85 | |
| 86 /* | |
| 87 * Now loop through the images, creating and drawing | |
| 88 * each one on the off-screen image before drawing it on | |
| 89 * the shell. | |
| 90 */ | |
| 91 while (!stop && !isDisposed() && timage !is null) { | |
| 92 | |
| 93 /* | |
| 94 * Fill with the background color before | |
| 95 * drawing. | |
| 96 */ | |
| 97 display.syncExec(dgRunnable( (ImageData fimageData){ | |
| 98 if (!isDisposed()) { | |
| 99 drawBackground(offScreenImageGC, fimageData.x, | |
| 100 fimageData.y, fimageData.width, | |
| 101 fimageData.height); | |
| 102 } | |
| 103 }, imageData )); | |
| 104 | |
| 105 synchronized (this.outer) { | |
| 106 imageDataIndex = (imageDataIndex + 1) % IMAGE_COUNT; | |
| 107 timage = getImage(imageDataIndex); | |
| 108 imageData = timage.getImageData(); | |
| 109 offScreenImageGC.drawImage(timage, 0, 0, | |
| 110 imageData.width, imageData.height, | |
| 111 imageData.x, imageData.y, imageData.width, | |
| 112 imageData.height); | |
| 113 } | |
| 114 | |
| 115 /* Draw the off-screen image to the shell. */ | |
| 116 animationImage = offScreenImage; | |
| 117 display.syncExec(dgRunnable( { | |
| 118 if (!isDisposed()) | |
| 119 redraw(); | |
| 120 })); | |
| 121 /* | |
| 122 * Sleep for the specified delay time | |
| 123 */ | |
| 124 try { | |
| 125 Thread.sleep(MILLISECONDS_OF_DELAY/1000.0); | |
| 126 } catch (InterruptedException e) { | |
| 76 | 127 ExceptionPrintStackTrace(e); |
| 75 | 128 } |
| 129 | |
| 130 | |
| 131 } | |
| 132 } catch (Exception e) { | |
| 133 } finally { | |
| 134 display.syncExec(dgRunnable( { | |
| 135 if (offScreenImage !is null | |
| 136 && !offScreenImage.isDisposed()) | |
| 137 offScreenImage.dispose(); | |
| 138 if (offScreenImageGC !is null | |
| 139 && !offScreenImageGC.isDisposed()) | |
| 140 offScreenImageGC.dispose(); | |
| 141 })); | |
| 142 clearImages(); | |
| 143 } | |
| 144 if (busyThread is null) | |
| 145 display.syncExec(dgRunnable( { | |
| 146 animationImage = null; | |
| 147 if (!isDisposed()) | |
| 148 redraw(); | |
| 149 })); | |
| 150 } | |
| 151 | |
| 152 public void setStop(bool stop) { | |
| 153 this.stop = stop; | |
| 154 } | |
| 155 } | |
| 156 | |
| 157 private static const int MARGIN = 0; | |
| 158 private static const int IMAGE_COUNT = 8; | |
| 159 private static const int MILLISECONDS_OF_DELAY = 180; | |
| 160 private Image[] imageCache; | |
| 161 protected Image image; | |
| 162 | |
| 163 protected Image animationImage; | |
| 164 | |
| 165 protected BusyThread busyThread; | |
| 166 | |
| 167 /** | |
| 168 * BusyWidget constructor comment. | |
| 169 * | |
| 170 * @param parent | |
| 171 * dwt.widgets.Composite | |
| 172 * @param style | |
| 173 * int | |
| 174 */ | |
| 175 public this(Composite parent, int style) { | |
| 176 super(parent, style); | |
| 177 | |
| 178 addPaintListener(new class PaintListener { | |
| 179 public void paintControl(PaintEvent event) { | |
| 180 onPaint(event); | |
| 181 } | |
| 182 }); | |
| 183 } | |
| 184 | |
| 185 public Point computeSize(int wHint, int hHint, bool changed) { | |
| 186 Point size = new Point(0, 0); | |
| 187 if (image !is null) { | |
| 188 Rectangle ibounds = image.getBounds(); | |
| 189 size.x = ibounds.width; | |
| 190 size.y = ibounds.height; | |
| 191 } | |
| 192 if (isBusy()) { | |
| 193 Rectangle bounds = getImage(0).getBounds(); | |
| 194 size.x = Math.max(size.x, bounds.width); | |
| 195 size.y = Math.max(size.y, bounds.height); | |
| 196 } | |
| 197 size.x += MARGIN + MARGIN; | |
| 198 size.y += MARGIN + MARGIN; | |
| 199 return size; | |
| 200 } | |
| 201 | |
| 202 /* (non-Javadoc) | |
| 203 * @see dwt.widgets.Control#forceFocus() | |
| 204 */ | |
| 205 public bool forceFocus() { | |
| 206 return false; | |
| 207 } | |
| 208 | |
| 209 /** | |
| 210 * Creates a thread to animate the image. | |
| 211 */ | |
| 212 protected synchronized void createBusyThread() { | |
| 213 if (busyThread !is null) | |
| 214 return; | |
| 215 | |
| 216 Rectangle bounds = getImage(0).getBounds(); | |
| 217 Display display = getDisplay(); | |
| 218 Image offScreenImage = new Image(display, bounds.width, bounds.height); | |
| 219 GC offScreenImageGC = new GC(offScreenImage); | |
| 220 busyThread = new BusyThread(bounds, display, offScreenImageGC, offScreenImage); | |
| 76 | 221 busyThread.priority((Thread.PRIORITY_MIN + Thread.PRIORITY_MAX )/2 + 2); |
| 222 busyThread.isDaemon(true); | |
| 75 | 223 busyThread.start(); |
| 224 } | |
| 225 | |
| 226 public void dispose() { | |
| 227 if (busyThread !is null) { | |
| 228 busyThread.setStop(true); | |
| 229 busyThread = null; | |
| 230 } | |
| 231 super.dispose(); | |
| 232 } | |
| 233 | |
| 234 /** | |
| 235 * Return the image or <code>null</code>. | |
| 236 */ | |
| 237 public Image getImage() { | |
| 238 return image; | |
| 239 } | |
| 240 | |
| 241 /** | |
| 242 * Returns true if it is currently busy. | |
| 243 * | |
| 244 * @return bool | |
| 245 */ | |
| 246 public bool isBusy() { | |
| 247 return (busyThread !is null); | |
| 248 } | |
| 249 | |
| 250 /* | |
| 251 * Process the paint event | |
| 252 */ | |
| 253 protected void onPaint(PaintEvent event) { | |
| 254 if (animationImage !is null && animationImage.isDisposed()) { | |
| 255 animationImage = null; | |
| 256 } | |
| 257 Rectangle rect = getClientArea(); | |
| 258 if (rect.width is 0 || rect.height is 0) | |
| 259 return; | |
| 260 | |
| 261 GC gc = event.gc; | |
| 262 Image activeImage = animationImage !is null ? animationImage : image; | |
| 263 if (activeImage !is null) { | |
| 264 Rectangle ibounds = activeImage.getBounds(); | |
| 265 gc.drawImage(activeImage, rect.width / 2 - ibounds.width / 2, | |
| 266 rect.height / 2 - ibounds.height / 2); | |
| 267 } | |
| 268 } | |
| 269 | |
| 270 /** | |
| 271 * Sets the indicators busy count up (true) or down (false) one. | |
| 272 * | |
| 273 * @param busy | |
| 274 * bool | |
| 275 */ | |
| 276 public synchronized void setBusy(bool busy) { | |
| 277 if (busy) { | |
| 278 if (busyThread is null) | |
| 279 createBusyThread(); | |
| 280 } else { | |
| 281 if (busyThread !is null) { | |
| 282 busyThread.setStop(true); | |
| 283 busyThread = null; | |
| 284 } | |
| 285 } | |
| 286 } | |
| 287 | |
| 288 /** | |
| 289 * Set the image. The value <code>null</code> clears it. | |
| 290 */ | |
| 291 public void setImage(Image image) { | |
| 292 if (image !is this.image && !isDisposed()) { | |
| 293 this.image = image; | |
| 294 redraw(); | |
| 295 } | |
| 296 } | |
| 297 | |
| 298 | |
| 299 private ImageDescriptor createImageDescriptor(String relativePath) { | |
| 300 //DWT_TODO | |
| 301 // Bundle bundle = Platform.getBundle("dwtx.ui.forms"); //$NON-NLS-1$ | |
| 302 // URL url = FileLocator.find(bundle, new Path(relativePath),null); | |
| 303 // if (url is null) return null; | |
| 304 // try { | |
| 305 // url = FileLocator.resolve(url); | |
| 306 // return ImageDescriptor.createFromURL(url); | |
| 307 // } catch (IOException e) { | |
| 308 // return null; | |
| 309 // } | |
| 310 return null; | |
| 311 } | |
| 312 | |
| 313 private synchronized Image getImage(int index) { | |
| 314 if (imageCache is null) { | |
| 315 imageCache = new Image[IMAGE_COUNT]; | |
| 316 } | |
| 317 if (imageCache[index] is null){ | |
| 318 ImageDescriptor descriptor = createImageDescriptor("$nl$/icons/progress/ani/" ~ to!(String)(index + 1) ~ ".png"); //$NON-NLS-1$ //$NON-NLS-2$ | |
| 319 imageCache[index] = descriptor.createImage(); | |
| 320 } | |
| 321 return imageCache[index]; | |
| 322 } | |
| 323 | |
| 324 private synchronized void clearImages() { | |
| 325 if (busyThread !is null) | |
| 326 return; | |
| 327 if (imageCache !is null) { | |
| 328 for (int index = 0; index < IMAGE_COUNT; index++) { | |
| 329 if (imageCache[index] !is null && !imageCache[index].isDisposed()) { | |
| 330 imageCache[index].dispose(); | |
| 331 imageCache[index] = null; | |
| 332 } | |
| 333 } | |
| 334 } | |
| 335 } | |
| 336 | |
| 337 } |