J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | package javax.swing; |
| 26 | |
| 27 | |
| 28 | import java.awt.*; |
| 29 | import java.awt.event.*; |
| 30 | import java.awt.peer.ComponentPeer; |
| 31 | import java.awt.peer.ContainerPeer; |
| 32 | import java.awt.image.VolatileImage; |
| 33 | import java.security.AccessController; |
| 34 | import java.util.*; |
| 35 | import java.applet.*; |
| 36 | |
| 37 | import sun.awt.AppContext; |
| 38 | import sun.awt.DisplayChangedListener; |
| 39 | import sun.awt.SunToolkit; |
| 40 | import sun.java2d.SunGraphicsEnvironment; |
| 41 | import sun.security.action.GetPropertyAction; |
| 42 | |
| 43 | |
| 44 | /** |
| 45 | * This class manages repaint requests, allowing the number |
| 46 | * of repaints to be minimized, for example by collapsing multiple |
| 47 | * requests into a single repaint for members of a component tree. |
| 48 | * <p> |
| 49 | * As of 1.6 <code>RepaintManager</code> handles repaint requests |
| 50 | * for Swing's top level components (<code>JApplet</code>, |
| 51 | * <code>JWindow</code>, <code>JFrame</code> and <code>JDialog</code>). |
| 52 | * Any calls to <code>repaint</code> on one of these will call into the |
| 53 | * appropriate <code>addDirtyRegion</code> method. |
| 54 | * |
| 55 | * @author Arnaud Weber |
| 56 | */ |
| 57 | public class RepaintManager |
| 58 | { |
| 59 | /** |
| 60 | * Whether or not the RepaintManager should handle paint requests |
| 61 | * for top levels. |
| 62 | */ |
| 63 | static final boolean HANDLE_TOP_LEVEL_PAINT; |
| 64 | |
| 65 | private static final short BUFFER_STRATEGY_NOT_SPECIFIED = 0; |
| 66 | private static final short BUFFER_STRATEGY_SPECIFIED_ON = 1; |
| 67 | private static final short BUFFER_STRATEGY_SPECIFIED_OFF = 2; |
| 68 | |
| 69 | private static final short BUFFER_STRATEGY_TYPE; |
| 70 | |
| 71 | /** |
| 72 | * Maps from GraphicsConfiguration to VolatileImage. |
| 73 | */ |
| 74 | private Map<GraphicsConfiguration,VolatileImage> volatileMap = new |
| 75 | HashMap<GraphicsConfiguration,VolatileImage>(1); |
| 76 | |
| 77 | // |
| 78 | // As of 1.6 Swing handles scheduling of paint events from native code. |
| 79 | // That is, SwingPaintEventDispatcher is invoked on the toolkit thread, |
| 80 | // which in turn invokes nativeAddDirtyRegion. Because this is invoked |
| 81 | // from the native thread we can not invoke any public methods and so |
| 82 | // we introduce these added maps. So, any time nativeAddDirtyRegion is |
| 83 | // invoked the region is added to hwDirtyComponents and a work request |
| 84 | // is scheduled. When the work request is processed all entries in |
| 85 | // this map are pushed to the real map (dirtyComponents) and then |
| 86 | // painted with the rest of the components. |
| 87 | // |
| 88 | private Map<Container,Rectangle> hwDirtyComponents; |
| 89 | |
| 90 | private Map<Component,Rectangle> dirtyComponents; |
| 91 | private Map<Component,Rectangle> tmpDirtyComponents; |
| 92 | private java.util.List<Component> invalidComponents; |
| 93 | |
| 94 | // List of Runnables that need to be processed before painting from AWT. |
| 95 | private java.util.List<Runnable> runnableList; |
| 96 | |
| 97 | boolean doubleBufferingEnabled = true; |
| 98 | |
| 99 | private Dimension doubleBufferMaxSize; |
| 100 | |
| 101 | // Support for both the standard and volatile offscreen buffers exists to |
| 102 | // provide backwards compatibility for the [rare] programs which may be |
| 103 | // calling getOffScreenBuffer() and not expecting to get a VolatileImage. |
| 104 | // Swing internally is migrating to use *only* the volatile image buffer. |
| 105 | |
| 106 | // Support for standard offscreen buffer |
| 107 | // |
| 108 | DoubleBufferInfo standardDoubleBuffer; |
| 109 | |
| 110 | /** |
| 111 | * Object responsible for hanlding core paint functionality. |
| 112 | */ |
| 113 | private PaintManager paintManager; |
| 114 | |
| 115 | private static final Object repaintManagerKey = RepaintManager.class; |
| 116 | |
| 117 | // Whether or not a VolatileImage should be used for double-buffered painting |
| 118 | static boolean volatileImageBufferEnabled = true; |
| 119 | /** |
| 120 | * Value of the system property awt.nativeDoubleBuffering. |
| 121 | */ |
| 122 | private static boolean nativeDoubleBuffering; |
| 123 | |
| 124 | // The maximum number of times Swing will attempt to use the VolatileImage |
| 125 | // buffer during a paint operation. |
| 126 | private static final int VOLATILE_LOOP_MAX = 2; |
| 127 | |
| 128 | /** |
| 129 | * Number of <code>beginPaint</code> that have been invoked. |
| 130 | */ |
| 131 | private int paintDepth = 0; |
| 132 | |
| 133 | /** |
| 134 | * Type of buffer strategy to use. Will be one of the BUFFER_STRATEGY_ |
| 135 | * constants. |
| 136 | */ |
| 137 | private short bufferStrategyType; |
| 138 | |
| 139 | // |
| 140 | // BufferStrategyPaintManager has the unique characteristic that it |
| 141 | // must deal with the buffer being lost while painting to it. For |
| 142 | // example, if we paint a component and show it and the buffer has |
| 143 | // become lost we must repaint the whole window. To deal with that |
| 144 | // the PaintManager calls into repaintRoot, and if we're still in |
| 145 | // the process of painting the repaintRoot field is set to the JRootPane |
| 146 | // and after the current JComponent.paintImmediately call finishes |
| 147 | // paintImmediately will be invoked on the repaintRoot. In this |
| 148 | // way we don't try to show garbage to the screen. |
| 149 | // |
| 150 | /** |
| 151 | * True if we're in the process of painting the dirty regions. This is |
| 152 | * set to true in <code>paintDirtyRegions</code>. |
| 153 | */ |
| 154 | private boolean painting; |
| 155 | /** |
| 156 | * If the PaintManager calls into repaintRoot during painting this field |
| 157 | * will be set to the root. |
| 158 | */ |
| 159 | private JComponent repaintRoot; |
| 160 | |
| 161 | /** |
| 162 | * The Thread that has initiated painting. If null it |
| 163 | * indicates painting is not currently in progress. |
| 164 | */ |
| 165 | private Thread paintThread; |
| 166 | |
| 167 | /** |
| 168 | * Runnable used to process all repaint/revalidate requests. |
| 169 | */ |
| 170 | private final ProcessingRunnable processingRunnable; |
| 171 | |
| 172 | |
| 173 | static { |
| 174 | volatileImageBufferEnabled = "true".equals(AccessController. |
| 175 | doPrivileged(new GetPropertyAction( |
| 176 | "swing.volatileImageBufferEnabled", "true"))); |
| 177 | boolean headless = GraphicsEnvironment.isHeadless(); |
| 178 | if (volatileImageBufferEnabled && headless) { |
| 179 | volatileImageBufferEnabled = false; |
| 180 | } |
| 181 | nativeDoubleBuffering = "true".equals(AccessController.doPrivileged( |
| 182 | new GetPropertyAction("awt.nativeDoubleBuffering"))); |
| 183 | String bs = AccessController.doPrivileged( |
| 184 | new GetPropertyAction("swing.bufferPerWindow")); |
| 185 | if (headless) { |
| 186 | BUFFER_STRATEGY_TYPE = BUFFER_STRATEGY_SPECIFIED_OFF; |
| 187 | } |
| 188 | else if (bs == null) { |
| 189 | BUFFER_STRATEGY_TYPE = BUFFER_STRATEGY_NOT_SPECIFIED; |
| 190 | } |
| 191 | else if ("true".equals(bs)) { |
| 192 | BUFFER_STRATEGY_TYPE = BUFFER_STRATEGY_SPECIFIED_ON; |
| 193 | } |
| 194 | else { |
| 195 | BUFFER_STRATEGY_TYPE = BUFFER_STRATEGY_SPECIFIED_OFF; |
| 196 | } |
| 197 | HANDLE_TOP_LEVEL_PAINT = "true".equals(AccessController.doPrivileged( |
| 198 | new GetPropertyAction("swing.handleTopLevelPaint", "true"))); |
| 199 | GraphicsEnvironment ge = GraphicsEnvironment. |
| 200 | getLocalGraphicsEnvironment(); |
| 201 | if (ge instanceof SunGraphicsEnvironment) { |
| 202 | ((SunGraphicsEnvironment)ge).addDisplayChangedListener( |
| 203 | new DisplayChangedHandler()); |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | /** |
| 208 | * Return the RepaintManager for the calling thread given a Component. |
| 209 | * |
| 210 | * @param c a Component -- unused in the default implementation, but could |
| 211 | * be used by an overridden version to return a different RepaintManager |
| 212 | * depending on the Component |
| 213 | * @return the RepaintManager object |
| 214 | */ |
| 215 | public static RepaintManager currentManager(Component c) { |
| 216 | // Note: DisplayChangedRunnable passes in null as the component, so if |
| 217 | // component is ever used to determine the current |
| 218 | // RepaintManager, DisplayChangedRunnable will need to be modified |
| 219 | // accordingly. |
| 220 | return currentManager(AppContext.getAppContext()); |
| 221 | } |
| 222 | |
| 223 | /** |
| 224 | * Returns the RepaintManager for the specified AppContext. If |
| 225 | * a RepaintManager has not been created for the specified |
| 226 | * AppContext this will return null. |
| 227 | */ |
| 228 | static RepaintManager currentManager(AppContext appContext) { |
| 229 | RepaintManager rm = (RepaintManager)appContext.get(repaintManagerKey); |
| 230 | if (rm == null) { |
| 231 | rm = new RepaintManager(BUFFER_STRATEGY_TYPE); |
| 232 | appContext.put(repaintManagerKey, rm); |
| 233 | } |
| 234 | return rm; |
| 235 | } |
| 236 | |
| 237 | /** |
| 238 | * Return the RepaintManager for the calling thread given a JComponent. |
| 239 | * <p> |
| 240 | * Note: This method exists for backward binary compatibility with earlier |
| 241 | * versions of the Swing library. It simply returns the result returned by |
| 242 | * {@link #currentManager(Component)}. |
| 243 | * |
| 244 | * @param c a JComponent -- unused |
| 245 | * @return the RepaintManager object |
| 246 | */ |
| 247 | public static RepaintManager currentManager(JComponent c) { |
| 248 | return currentManager((Component)c); |
| 249 | } |
| 250 | |
| 251 | |
| 252 | /** |
| 253 | * Set the RepaintManager that should be used for the calling |
| 254 | * thread. <b>aRepaintManager</b> will become the current RepaintManager |
| 255 | * for the calling thread's thread group. |
| 256 | * @param aRepaintManager the RepaintManager object to use |
| 257 | */ |
| 258 | public static void setCurrentManager(RepaintManager aRepaintManager) { |
| 259 | if (aRepaintManager != null) { |
| 260 | SwingUtilities.appContextPut(repaintManagerKey, aRepaintManager); |
| 261 | } else { |
| 262 | SwingUtilities.appContextRemove(repaintManagerKey); |
| 263 | } |
| 264 | } |
| 265 | |
| 266 | /** |
| 267 | * Create a new RepaintManager instance. You rarely call this constructor. |
| 268 | * directly. To get the default RepaintManager, use |
| 269 | * RepaintManager.currentManager(JComponent) (normally "this"). |
| 270 | */ |
| 271 | public RepaintManager() { |
| 272 | // Because we can't know what a subclass is doing with the |
| 273 | // volatile image we immediately punt in subclasses. If this |
| 274 | // poses a problem we'll need a more sophisticated detection algorithm, |
| 275 | // or API. |
| 276 | this(BUFFER_STRATEGY_SPECIFIED_OFF); |
| 277 | } |
| 278 | |
| 279 | private RepaintManager(short bufferStrategyType) { |
| 280 | // If native doublebuffering is being used, do NOT use |
| 281 | // Swing doublebuffering. |
| 282 | doubleBufferingEnabled = !nativeDoubleBuffering; |
| 283 | synchronized(this) { |
| 284 | dirtyComponents = new IdentityHashMap<Component,Rectangle>(); |
| 285 | tmpDirtyComponents = new IdentityHashMap<Component,Rectangle>(); |
| 286 | this.bufferStrategyType = bufferStrategyType; |
| 287 | hwDirtyComponents = new IdentityHashMap<Container,Rectangle>(); |
| 288 | } |
| 289 | processingRunnable = new ProcessingRunnable(); |
| 290 | } |
| 291 | |
| 292 | private void displayChanged() { |
| 293 | clearImages(); |
| 294 | } |
| 295 | |
| 296 | /** |
| 297 | * Mark the component as in need of layout and queue a runnable |
| 298 | * for the event dispatching thread that will validate the components |
| 299 | * first isValidateRoot() ancestor. |
| 300 | * |
| 301 | * @see JComponent#isValidateRoot |
| 302 | * @see #removeInvalidComponent |
| 303 | */ |
| 304 | public synchronized void addInvalidComponent(JComponent invalidComponent) |
| 305 | { |
| 306 | Component validateRoot = null; |
| 307 | |
| 308 | /* Find the first JComponent ancestor of this component whose |
| 309 | * isValidateRoot() method returns true. |
| 310 | */ |
| 311 | for(Component c = invalidComponent; c != null; c = c.getParent()) { |
| 312 | if ((c instanceof CellRendererPane) || (c.getPeer() == null)) { |
| 313 | return; |
| 314 | } |
| 315 | if ((c instanceof JComponent) && (((JComponent)c).isValidateRoot())) { |
| 316 | validateRoot = c; |
| 317 | break; |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | /* There's no validateRoot to apply validate to, so we're done. |
| 322 | */ |
| 323 | if (validateRoot == null) { |
| 324 | return; |
| 325 | } |
| 326 | |
| 327 | /* If the validateRoot and all of its ancestors aren't visible |
| 328 | * then we don't do anything. While we're walking up the tree |
| 329 | * we find the root Window or Applet. |
| 330 | */ |
| 331 | Component root = null; |
| 332 | |
| 333 | for(Component c = validateRoot; c != null; c = c.getParent()) { |
| 334 | if (!c.isVisible() || (c.getPeer() == null)) { |
| 335 | return; |
| 336 | } |
| 337 | if ((c instanceof Window) || (c instanceof Applet)) { |
| 338 | root = c; |
| 339 | break; |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | if (root == null) { |
| 344 | return; |
| 345 | } |
| 346 | |
| 347 | /* Lazily create the invalidateComponents vector and add the |
| 348 | * validateRoot if it's not there already. If this validateRoot |
| 349 | * is already in the vector, we're done. |
| 350 | */ |
| 351 | if (invalidComponents == null) { |
| 352 | invalidComponents = new ArrayList<Component>(); |
| 353 | } |
| 354 | else { |
| 355 | int n = invalidComponents.size(); |
| 356 | for(int i = 0; i < n; i++) { |
| 357 | if(validateRoot == invalidComponents.get(i)) { |
| 358 | return; |
| 359 | } |
| 360 | } |
| 361 | } |
| 362 | invalidComponents.add(validateRoot); |
| 363 | |
| 364 | // Queue a Runnable to invoke paintDirtyRegions and |
| 365 | // validateInvalidComponents. |
| 366 | scheduleProcessingRunnable(); |
| 367 | } |
| 368 | |
| 369 | |
| 370 | /** |
| 371 | * Remove a component from the list of invalid components. |
| 372 | * |
| 373 | * @see #addInvalidComponent |
| 374 | */ |
| 375 | public synchronized void removeInvalidComponent(JComponent component) { |
| 376 | if(invalidComponents != null) { |
| 377 | int index = invalidComponents.indexOf(component); |
| 378 | if(index != -1) { |
| 379 | invalidComponents.remove(index); |
| 380 | } |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | |
| 385 | /** |
| 386 | * Add a component in the list of components that should be refreshed. |
| 387 | * If <i>c</i> already has a dirty region, the rectangle <i>(x,y,w,h)</i> |
| 388 | * will be unioned with the region that should be redrawn. |
| 389 | * |
| 390 | * @see JComponent#repaint |
| 391 | */ |
| 392 | private void addDirtyRegion0(Container c, int x, int y, int w, int h) { |
| 393 | /* Special cases we don't have to bother with. |
| 394 | */ |
| 395 | if ((w <= 0) || (h <= 0) || (c == null)) { |
| 396 | return; |
| 397 | } |
| 398 | |
| 399 | if ((c.getWidth() <= 0) || (c.getHeight() <= 0)) { |
| 400 | return; |
| 401 | } |
| 402 | |
| 403 | if (extendDirtyRegion(c, x, y, w, h)) { |
| 404 | // Component was already marked as dirty, region has been |
| 405 | // extended, no need to continue. |
| 406 | return; |
| 407 | } |
| 408 | |
| 409 | /* Make sure that c and all it ancestors (up to an Applet or |
| 410 | * Window) are visible. This loop has the same effect as |
| 411 | * checking c.isShowing() (and note that it's still possible |
| 412 | * that c is completely obscured by an opaque ancestor in |
| 413 | * the specified rectangle). |
| 414 | */ |
| 415 | Component root = null; |
| 416 | |
| 417 | // Note: We can't synchronize around this, Frame.getExtendedState |
| 418 | // is synchronized so that if we were to synchronize around this |
| 419 | // it could lead to the possibility of getting locks out |
| 420 | // of order and deadlocking. |
| 421 | for (Container p = c; p != null; p = p.getParent()) { |
| 422 | if (!p.isVisible() || (p.getPeer() == null)) { |
| 423 | return; |
| 424 | } |
| 425 | if ((p instanceof Window) || (p instanceof Applet)) { |
| 426 | // Iconified frames are still visible! |
| 427 | if (p instanceof Frame && |
| 428 | (((Frame)p).getExtendedState() & Frame.ICONIFIED) == |
| 429 | Frame.ICONIFIED) { |
| 430 | return; |
| 431 | } |
| 432 | root = p; |
| 433 | break; |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | if (root == null) return; |
| 438 | |
| 439 | synchronized(this) { |
| 440 | if (extendDirtyRegion(c, x, y, w, h)) { |
| 441 | // In between last check and this check another thread |
| 442 | // queued up runnable, can bail here. |
| 443 | return; |
| 444 | } |
| 445 | dirtyComponents.put(c, new Rectangle(x, y, w, h)); |
| 446 | } |
| 447 | |
| 448 | // Queue a Runnable to invoke paintDirtyRegions and |
| 449 | // validateInvalidComponents. |
| 450 | scheduleProcessingRunnable(); |
| 451 | } |
| 452 | |
| 453 | /** |
| 454 | * Add a component in the list of components that should be refreshed. |
| 455 | * If <i>c</i> already has a dirty region, the rectangle <i>(x,y,w,h)</i> |
| 456 | * will be unioned with the region that should be redrawn. |
| 457 | * |
| 458 | * @param c Component to repaint, null results in nothing happening. |
| 459 | * @param x X coordinate of the region to repaint |
| 460 | * @param y Y coordinate of the region to repaint |
| 461 | * @param w Width of the region to repaint |
| 462 | * @param h Height of the region to repaint |
| 463 | * @see JComponent#repaint |
| 464 | */ |
| 465 | public void addDirtyRegion(JComponent c, int x, int y, int w, int h) |
| 466 | { |
| 467 | addDirtyRegion0(c, x, y, w, h); |
| 468 | } |
| 469 | |
| 470 | /** |
| 471 | * Adds <code>window</code> to the list of <code>Component</code>s that |
| 472 | * need to be repainted. |
| 473 | * |
| 474 | * @param window Window to repaint, null results in nothing happening. |
| 475 | * @param x X coordinate of the region to repaint |
| 476 | * @param y Y coordinate of the region to repaint |
| 477 | * @param w Width of the region to repaint |
| 478 | * @param h Height of the region to repaint |
| 479 | * @see JFrame#repaint |
| 480 | * @see JWindow#repaint |
| 481 | * @see JDialog#repaint |
| 482 | * @since 1.6 |
| 483 | */ |
| 484 | public void addDirtyRegion(Window window, int x, int y, int w, int h) { |
| 485 | addDirtyRegion0(window, x, y, w, h); |
| 486 | } |
| 487 | |
| 488 | /** |
| 489 | * Adds <code>applet</code> to the list of <code>Component</code>s that |
| 490 | * need to be repainted. |
| 491 | * |
| 492 | * @param applet Applet to repaint, null results in nothing happening. |
| 493 | * @param x X coordinate of the region to repaint |
| 494 | * @param y Y coordinate of the region to repaint |
| 495 | * @param w Width of the region to repaint |
| 496 | * @param h Height of the region to repaint |
| 497 | * @see JApplet#repaint |
| 498 | * @since 1.6 |
| 499 | */ |
| 500 | public void addDirtyRegion(Applet applet, int x, int y, int w, int h) { |
| 501 | addDirtyRegion0(applet, x, y, w, h); |
| 502 | } |
| 503 | |
| 504 | void scheduleHeavyWeightPaints() { |
| 505 | Map<Container,Rectangle> hws; |
| 506 | |
| 507 | synchronized(this) { |
| 508 | if (hwDirtyComponents.size() == 0) { |
| 509 | return; |
| 510 | } |
| 511 | hws = hwDirtyComponents; |
| 512 | hwDirtyComponents = new IdentityHashMap<Container,Rectangle>(); |
| 513 | } |
| 514 | for (Container hw : hws.keySet()) { |
| 515 | Rectangle dirty = hws.get(hw); |
| 516 | if (hw instanceof Window) { |
| 517 | addDirtyRegion((Window)hw, dirty.x, dirty.y, |
| 518 | dirty.width, dirty.height); |
| 519 | } |
| 520 | else if (hw instanceof Applet) { |
| 521 | addDirtyRegion((Applet)hw, dirty.x, dirty.y, |
| 522 | dirty.width, dirty.height); |
| 523 | } |
| 524 | else { // SwingHeavyWeight |
| 525 | addDirtyRegion0(hw, dirty.x, dirty.y, |
| 526 | dirty.width, dirty.height); |
| 527 | } |
| 528 | } |
| 529 | } |
| 530 | |
| 531 | // |
| 532 | // This is called from the toolkit thread when a native expose is |
| 533 | // received. |
| 534 | // |
| 535 | void nativeAddDirtyRegion(AppContext appContext, Container c, |
| 536 | int x, int y, int w, int h) { |
| 537 | if (w > 0 && h > 0) { |
| 538 | synchronized(this) { |
| 539 | Rectangle dirty = hwDirtyComponents.get(c); |
| 540 | if (dirty == null) { |
| 541 | hwDirtyComponents.put(c, new Rectangle(x, y, w, h)); |
| 542 | } |
| 543 | else { |
| 544 | hwDirtyComponents.put(c, SwingUtilities.computeUnion( |
| 545 | x, y, w, h, dirty)); |
| 546 | } |
| 547 | } |
| 548 | scheduleProcessingRunnable(appContext); |
| 549 | } |
| 550 | } |
| 551 | |
| 552 | // |
| 553 | // This is called from the toolkit thread when awt needs to run a |
| 554 | // Runnable before we paint. |
| 555 | // |
| 556 | void nativeQueueSurfaceDataRunnable(AppContext appContext, Component c, |
| 557 | Runnable r) { |
| 558 | synchronized(this) { |
| 559 | if (runnableList == null) { |
| 560 | runnableList = new LinkedList<Runnable>(); |
| 561 | } |
| 562 | runnableList.add(r); |
| 563 | } |
| 564 | scheduleProcessingRunnable(appContext); |
| 565 | } |
| 566 | |
| 567 | /** |
| 568 | * Extends the dirty region for the specified component to include |
| 569 | * the new region. |
| 570 | * |
| 571 | * @return false if <code>c</code> is not yet marked dirty. |
| 572 | */ |
| 573 | private synchronized boolean extendDirtyRegion( |
| 574 | Component c, int x, int y, int w, int h) { |
| 575 | Rectangle r = (Rectangle)dirtyComponents.get(c); |
| 576 | if (r != null) { |
| 577 | // A non-null r implies c is already marked as dirty, |
| 578 | // and that the parent is valid. Therefore we can |
| 579 | // just union the rect and bail. |
| 580 | SwingUtilities.computeUnion(x, y, w, h, r); |
| 581 | return true; |
| 582 | } |
| 583 | return false; |
| 584 | } |
| 585 | |
| 586 | /** Return the current dirty region for a component. |
| 587 | * Return an empty rectangle if the component is not |
| 588 | * dirty. |
| 589 | */ |
| 590 | public Rectangle getDirtyRegion(JComponent aComponent) { |
| 591 | Rectangle r = null; |
| 592 | synchronized(this) { |
| 593 | r = (Rectangle)dirtyComponents.get(aComponent); |
| 594 | } |
| 595 | if(r == null) |
| 596 | return new Rectangle(0,0,0,0); |
| 597 | else |
| 598 | return new Rectangle(r); |
| 599 | } |
| 600 | |
| 601 | /** |
| 602 | * Mark a component completely dirty. <b>aComponent</b> will be |
| 603 | * completely painted during the next paintDirtyRegions() call. |
| 604 | */ |
| 605 | public void markCompletelyDirty(JComponent aComponent) { |
| 606 | addDirtyRegion(aComponent,0,0,Integer.MAX_VALUE,Integer.MAX_VALUE); |
| 607 | } |
| 608 | |
| 609 | /** |
| 610 | * Mark a component completely clean. <b>aComponent</b> will not |
| 611 | * get painted during the next paintDirtyRegions() call. |
| 612 | */ |
| 613 | public void markCompletelyClean(JComponent aComponent) { |
| 614 | synchronized(this) { |
| 615 | dirtyComponents.remove(aComponent); |
| 616 | } |
| 617 | } |
| 618 | |
| 619 | /** |
| 620 | * Convenience method that returns true if <b>aComponent</b> will be completely |
| 621 | * painted during the next paintDirtyRegions(). If computing dirty regions is |
| 622 | * expensive for your component, use this method and avoid computing dirty region |
| 623 | * if it return true. |
| 624 | */ |
| 625 | public boolean isCompletelyDirty(JComponent aComponent) { |
| 626 | Rectangle r; |
| 627 | |
| 628 | r = getDirtyRegion(aComponent); |
| 629 | if(r.width == Integer.MAX_VALUE && |
| 630 | r.height == Integer.MAX_VALUE) |
| 631 | return true; |
| 632 | else |
| 633 | return false; |
| 634 | } |
| 635 | |
| 636 | |
| 637 | /** |
| 638 | * Validate all of the components that have been marked invalid. |
| 639 | * @see #addInvalidComponent |
| 640 | */ |
| 641 | public void validateInvalidComponents() { |
| 642 | java.util.List<Component> ic; |
| 643 | synchronized(this) { |
| 644 | if(invalidComponents == null) { |
| 645 | return; |
| 646 | } |
| 647 | ic = invalidComponents; |
| 648 | invalidComponents = null; |
| 649 | } |
| 650 | int n = ic.size(); |
| 651 | for(int i = 0; i < n; i++) { |
| 652 | ic.get(i).validate(); |
| 653 | } |
| 654 | } |
| 655 | |
| 656 | |
| 657 | /** |
| 658 | * This is invoked to process paint requests. It's needed |
| 659 | * for backward compatability in so far as RepaintManager would previously |
| 660 | * not see paint requests for top levels, so, we have to make sure |
| 661 | * a subclass correctly paints any dirty top levels. |
| 662 | */ |
| 663 | private void prePaintDirtyRegions() { |
| 664 | Map<Component,Rectangle> dirtyComponents; |
| 665 | java.util.List<Runnable> runnableList; |
| 666 | synchronized(this) { |
| 667 | dirtyComponents = this.dirtyComponents; |
| 668 | runnableList = this.runnableList; |
| 669 | this.runnableList = null; |
| 670 | } |
| 671 | if (runnableList != null) { |
| 672 | for (Runnable runnable : runnableList) { |
| 673 | runnable.run(); |
| 674 | } |
| 675 | } |
| 676 | paintDirtyRegions(); |
| 677 | if (dirtyComponents.size() > 0) { |
| 678 | // This'll only happen if a subclass isn't correctly dealing |
| 679 | // with toplevels. |
| 680 | paintDirtyRegions(dirtyComponents); |
| 681 | } |
| 682 | } |
| 683 | |
| 684 | /** |
| 685 | * Paint all of the components that have been marked dirty. |
| 686 | * |
| 687 | * @see #addDirtyRegion |
| 688 | */ |
| 689 | public void paintDirtyRegions() { |
| 690 | synchronized(this) { // swap for thread safety |
| 691 | Map<Component,Rectangle> tmp = tmpDirtyComponents; |
| 692 | tmpDirtyComponents = dirtyComponents; |
| 693 | dirtyComponents = tmp; |
| 694 | dirtyComponents.clear(); |
| 695 | } |
| 696 | paintDirtyRegions(tmpDirtyComponents); |
| 697 | } |
| 698 | |
| 699 | private void paintDirtyRegions(Map<Component,Rectangle> |
| 700 | tmpDirtyComponents){ |
| 701 | int i, count; |
| 702 | java.util.List<Component> roots; |
| 703 | Component dirtyComponent; |
| 704 | |
| 705 | count = tmpDirtyComponents.size(); |
| 706 | if (count == 0) { |
| 707 | return; |
| 708 | } |
| 709 | |
| 710 | Rectangle rect; |
| 711 | int localBoundsX = 0; |
| 712 | int localBoundsY = 0; |
| 713 | int localBoundsH = 0; |
| 714 | int localBoundsW = 0; |
| 715 | Enumeration keys; |
| 716 | |
| 717 | roots = new ArrayList<Component>(count); |
| 718 | |
| 719 | for (Component dirty : tmpDirtyComponents.keySet()) { |
| 720 | collectDirtyComponents(tmpDirtyComponents, dirty, roots); |
| 721 | } |
| 722 | |
| 723 | count = roots.size(); |
| 724 | // System.out.println("roots size is " + count); |
| 725 | painting = true; |
| 726 | try { |
| 727 | for(i=0 ; i < count ; i++) { |
| 728 | dirtyComponent = roots.get(i); |
| 729 | rect = tmpDirtyComponents.get(dirtyComponent); |
| 730 | // System.out.println("Should refresh :" + rect); |
| 731 | localBoundsH = dirtyComponent.getHeight(); |
| 732 | localBoundsW = dirtyComponent.getWidth(); |
| 733 | |
| 734 | SwingUtilities.computeIntersection(localBoundsX, |
| 735 | localBoundsY, |
| 736 | localBoundsW, |
| 737 | localBoundsH, |
| 738 | rect); |
| 739 | if (dirtyComponent instanceof JComponent) { |
| 740 | ((JComponent)dirtyComponent).paintImmediately( |
| 741 | rect.x,rect.y,rect.width, rect.height); |
| 742 | } |
| 743 | else if (dirtyComponent.isShowing()) { |
| 744 | Graphics g = JComponent.safelyGetGraphics( |
| 745 | dirtyComponent, dirtyComponent); |
| 746 | // If the Graphics goes away, it means someone disposed of |
| 747 | // the window, don't do anything. |
| 748 | if (g != null) { |
| 749 | g.setClip(rect.x, rect.y, rect.width, rect.height); |
| 750 | try { |
| 751 | dirtyComponent.paint(g); |
| 752 | } finally { |
| 753 | g.dispose(); |
| 754 | } |
| 755 | } |
| 756 | } |
| 757 | // If the repaintRoot has been set, service it now and |
| 758 | // remove any components that are children of repaintRoot. |
| 759 | if (repaintRoot != null) { |
| 760 | adjustRoots(repaintRoot, roots, i + 1); |
| 761 | count = roots.size(); |
| 762 | paintManager.isRepaintingRoot = true; |
| 763 | repaintRoot.paintImmediately(0, 0, repaintRoot.getWidth(), |
| 764 | repaintRoot.getHeight()); |
| 765 | paintManager.isRepaintingRoot = false; |
| 766 | // Only service repaintRoot once. |
| 767 | repaintRoot = null; |
| 768 | } |
| 769 | } |
| 770 | } finally { |
| 771 | painting = false; |
| 772 | } |
| 773 | tmpDirtyComponents.clear(); |
| 774 | } |
| 775 | |
| 776 | |
| 777 | /** |
| 778 | * Removes any components from roots that are children of |
| 779 | * root. |
| 780 | */ |
| 781 | private void adjustRoots(JComponent root, |
| 782 | java.util.List<Component> roots, int index) { |
| 783 | for (int i = roots.size() - 1; i >= index; i--) { |
| 784 | Component c = roots.get(i); |
| 785 | for(;;) { |
| 786 | if (c == root || c == null || !(c instanceof JComponent)) { |
| 787 | break; |
| 788 | } |
| 789 | c = c.getParent(); |
| 790 | } |
| 791 | if (c == root) { |
| 792 | roots.remove(i); |
| 793 | } |
| 794 | } |
| 795 | } |
| 796 | |
| 797 | Rectangle tmp = new Rectangle(); |
| 798 | |
| 799 | void collectDirtyComponents(Map<Component,Rectangle> dirtyComponents, |
| 800 | Component dirtyComponent, |
| 801 | java.util.List<Component> roots) { |
| 802 | int dx, dy, rootDx, rootDy; |
| 803 | Component component, rootDirtyComponent,parent; |
| 804 | Rectangle cBounds; |
| 805 | |
| 806 | // Find the highest parent which is dirty. When we get out of this |
| 807 | // rootDx and rootDy will contain the translation from the |
| 808 | // rootDirtyComponent's coordinate system to the coordinates of the |
| 809 | // original dirty component. The tmp Rect is also used to compute the |
| 810 | // visible portion of the dirtyRect. |
| 811 | |
| 812 | component = rootDirtyComponent = dirtyComponent; |
| 813 | |
| 814 | int x = dirtyComponent.getX(); |
| 815 | int y = dirtyComponent.getY(); |
| 816 | int w = dirtyComponent.getWidth(); |
| 817 | int h = dirtyComponent.getHeight(); |
| 818 | |
| 819 | dx = rootDx = 0; |
| 820 | dy = rootDy = 0; |
| 821 | tmp.setBounds((Rectangle) dirtyComponents.get(dirtyComponent)); |
| 822 | |
| 823 | // System.out.println("Collect dirty component for bound " + tmp + |
| 824 | // "component bounds is " + cBounds);; |
| 825 | SwingUtilities.computeIntersection(0,0,w,h,tmp); |
| 826 | |
| 827 | if (tmp.isEmpty()) { |
| 828 | // System.out.println("Empty 1"); |
| 829 | return; |
| 830 | } |
| 831 | |
| 832 | for(;;) { |
| 833 | if(!(component instanceof JComponent)) |
| 834 | break; |
| 835 | |
| 836 | parent = component.getParent(); |
| 837 | if(parent == null) |
| 838 | break; |
| 839 | |
| 840 | component = parent; |
| 841 | |
| 842 | dx += x; |
| 843 | dy += y; |
| 844 | tmp.setLocation(tmp.x + x, tmp.y + y); |
| 845 | |
| 846 | x = component.getX(); |
| 847 | y = component.getY(); |
| 848 | w = component.getWidth(); |
| 849 | h = component.getHeight(); |
| 850 | tmp = SwingUtilities.computeIntersection(0,0,w,h,tmp); |
| 851 | |
| 852 | if (tmp.isEmpty()) { |
| 853 | // System.out.println("Empty 2"); |
| 854 | return; |
| 855 | } |
| 856 | |
| 857 | if (dirtyComponents.get(component) != null) { |
| 858 | rootDirtyComponent = component; |
| 859 | rootDx = dx; |
| 860 | rootDy = dy; |
| 861 | } |
| 862 | } |
| 863 | |
| 864 | if (dirtyComponent != rootDirtyComponent) { |
| 865 | Rectangle r; |
| 866 | tmp.setLocation(tmp.x + rootDx - dx, |
| 867 | tmp.y + rootDy - dy); |
| 868 | r = (Rectangle)dirtyComponents.get(rootDirtyComponent); |
| 869 | SwingUtilities.computeUnion(tmp.x,tmp.y,tmp.width,tmp.height,r); |
| 870 | } |
| 871 | |
| 872 | // If we haven't seen this root before, then we need to add it to the |
| 873 | // list of root dirty Views. |
| 874 | |
| 875 | if (!roots.contains(rootDirtyComponent)) |
| 876 | roots.add(rootDirtyComponent); |
| 877 | } |
| 878 | |
| 879 | |
| 880 | /** |
| 881 | * Returns a string that displays and identifies this |
| 882 | * object's properties. |
| 883 | * |
| 884 | * @return a String representation of this object |
| 885 | */ |
| 886 | public synchronized String toString() { |
| 887 | StringBuffer sb = new StringBuffer(); |
| 888 | if(dirtyComponents != null) |
| 889 | sb.append("" + dirtyComponents); |
| 890 | return sb.toString(); |
| 891 | } |
| 892 | |
| 893 | |
| 894 | /** |
| 895 | * Return the offscreen buffer that should be used as a double buffer with |
| 896 | * the component <code>c</code>. |
| 897 | * By default there is a double buffer per RepaintManager. |
| 898 | * The buffer might be smaller than <code>(proposedWidth,proposedHeight)</code> |
| 899 | * This happens when the maximum double buffer size as been set for the receiving |
| 900 | * repaint manager. |
| 901 | */ |
| 902 | public Image getOffscreenBuffer(Component c,int proposedWidth,int proposedHeight) { |
| 903 | return _getOffscreenBuffer(c, proposedWidth, proposedHeight); |
| 904 | } |
| 905 | |
| 906 | /** |
| 907 | * Return a volatile offscreen buffer that should be used as a |
| 908 | * double buffer with the specified component <code>c</code>. |
| 909 | * The image returned will be an instance of VolatileImage, or null |
| 910 | * if a VolatileImage object could not be instantiated. |
| 911 | * This buffer might be smaller than <code>(proposedWidth,proposedHeight)</code>. |
| 912 | * This happens when the maximum double buffer size has been set for this |
| 913 | * repaint manager. |
| 914 | * |
| 915 | * @see java.awt.image.VolatileImage |
| 916 | * @since 1.4 |
| 917 | */ |
| 918 | public Image getVolatileOffscreenBuffer(Component c, |
| 919 | int proposedWidth,int proposedHeight) { |
| 920 | GraphicsConfiguration config = c.getGraphicsConfiguration(); |
| 921 | if (config == null) { |
| 922 | config = GraphicsEnvironment.getLocalGraphicsEnvironment(). |
| 923 | getDefaultScreenDevice().getDefaultConfiguration(); |
| 924 | } |
| 925 | Dimension maxSize = getDoubleBufferMaximumSize(); |
| 926 | int width = proposedWidth < 1 ? 1 : |
| 927 | (proposedWidth > maxSize.width? maxSize.width : proposedWidth); |
| 928 | int height = proposedHeight < 1 ? 1 : |
| 929 | (proposedHeight > maxSize.height? maxSize.height : proposedHeight); |
| 930 | VolatileImage image = volatileMap.get(config); |
| 931 | if (image == null || image.getWidth() < width || |
| 932 | image.getHeight() < height) { |
| 933 | if (image != null) { |
| 934 | image.flush(); |
| 935 | } |
| 936 | image = config.createCompatibleVolatileImage(width, height); |
| 937 | volatileMap.put(config, image); |
| 938 | } |
| 939 | return image; |
| 940 | } |
| 941 | |
| 942 | private Image _getOffscreenBuffer(Component c, int proposedWidth, int proposedHeight) { |
| 943 | Dimension maxSize = getDoubleBufferMaximumSize(); |
| 944 | DoubleBufferInfo doubleBuffer = null; |
| 945 | int width, height; |
| 946 | |
| 947 | if (standardDoubleBuffer == null) { |
| 948 | standardDoubleBuffer = new DoubleBufferInfo(); |
| 949 | } |
| 950 | doubleBuffer = standardDoubleBuffer; |
| 951 | |
| 952 | width = proposedWidth < 1? 1 : |
| 953 | (proposedWidth > maxSize.width? maxSize.width : proposedWidth); |
| 954 | height = proposedHeight < 1? 1 : |
| 955 | (proposedHeight > maxSize.height? maxSize.height : proposedHeight); |
| 956 | |
| 957 | if (doubleBuffer.needsReset || (doubleBuffer.image != null && |
| 958 | (doubleBuffer.size.width < width || |
| 959 | doubleBuffer.size.height < height))) { |
| 960 | doubleBuffer.needsReset = false; |
| 961 | if (doubleBuffer.image != null) { |
| 962 | doubleBuffer.image.flush(); |
| 963 | doubleBuffer.image = null; |
| 964 | } |
| 965 | width = Math.max(doubleBuffer.size.width, width); |
| 966 | height = Math.max(doubleBuffer.size.height, height); |
| 967 | } |
| 968 | |
| 969 | Image result = doubleBuffer.image; |
| 970 | |
| 971 | if (doubleBuffer.image == null) { |
| 972 | result = c.createImage(width , height); |
| 973 | doubleBuffer.size = new Dimension(width, height); |
| 974 | if (c instanceof JComponent) { |
| 975 | ((JComponent)c).setCreatedDoubleBuffer(true); |
| 976 | doubleBuffer.image = result; |
| 977 | } |
| 978 | // JComponent will inform us when it is no longer valid |
| 979 | // (via removeNotify) we have no such hook to other components, |
| 980 | // therefore we don't keep a ref to the Component |
| 981 | // (indirectly through the Image) by stashing the image. |
| 982 | } |
| 983 | return result; |
| 984 | } |
| 985 | |
| 986 | |
| 987 | /** Set the maximum double buffer size. **/ |
| 988 | public void setDoubleBufferMaximumSize(Dimension d) { |
| 989 | doubleBufferMaxSize = d; |
| 990 | if (doubleBufferMaxSize == null) { |
| 991 | clearImages(); |
| 992 | } else { |
| 993 | clearImages(d.width, d.height); |
| 994 | } |
| 995 | } |
| 996 | |
| 997 | private void clearImages() { |
| 998 | clearImages(0, 0); |
| 999 | } |
| 1000 | |
| 1001 | private void clearImages(int width, int height) { |
| 1002 | if (standardDoubleBuffer != null && standardDoubleBuffer.image != null) { |
| 1003 | if (standardDoubleBuffer.image.getWidth(null) > width || |
| 1004 | standardDoubleBuffer.image.getHeight(null) > height) { |
| 1005 | standardDoubleBuffer.image.flush(); |
| 1006 | standardDoubleBuffer.image = null; |
| 1007 | } |
| 1008 | } |
| 1009 | // Clear out the VolatileImages |
| 1010 | Iterator gcs = volatileMap.keySet().iterator(); |
| 1011 | while (gcs.hasNext()) { |
| 1012 | GraphicsConfiguration gc = (GraphicsConfiguration)gcs.next(); |
| 1013 | VolatileImage image = (VolatileImage)volatileMap.get(gc); |
| 1014 | if (image.getWidth() > width || image.getHeight() > height) { |
| 1015 | image.flush(); |
| 1016 | gcs.remove(); |
| 1017 | } |
| 1018 | } |
| 1019 | } |
| 1020 | |
| 1021 | /** |
| 1022 | * Returns the maximum double buffer size. |
| 1023 | * |
| 1024 | * @return a Dimension object representing the maximum size |
| 1025 | */ |
| 1026 | public Dimension getDoubleBufferMaximumSize() { |
| 1027 | if (doubleBufferMaxSize == null) { |
| 1028 | try { |
| 1029 | Rectangle virtualBounds = new Rectangle(); |
| 1030 | GraphicsEnvironment ge = GraphicsEnvironment. |
| 1031 | getLocalGraphicsEnvironment(); |
| 1032 | for (GraphicsDevice gd : ge.getScreenDevices()) { |
| 1033 | GraphicsConfiguration gc = gd.getDefaultConfiguration(); |
| 1034 | virtualBounds = virtualBounds.union(gc.getBounds()); |
| 1035 | } |
| 1036 | doubleBufferMaxSize = new Dimension(virtualBounds.width, |
| 1037 | virtualBounds.height); |
| 1038 | } catch (HeadlessException e) { |
| 1039 | doubleBufferMaxSize = new Dimension(Integer.MAX_VALUE, Integer.MAX_VALUE); |
| 1040 | } |
| 1041 | } |
| 1042 | return doubleBufferMaxSize; |
| 1043 | } |
| 1044 | |
| 1045 | /** |
| 1046 | * Enables or disables double buffering in this RepaintManager. |
| 1047 | * CAUTION: The default value for this property is set for optimal |
| 1048 | * paint performance on the given platform and it is not recommended |
| 1049 | * that programs modify this property directly. |
| 1050 | * |
| 1051 | * @param aFlag true to activate double buffering |
| 1052 | * @see #isDoubleBufferingEnabled |
| 1053 | */ |
| 1054 | public void setDoubleBufferingEnabled(boolean aFlag) { |
| 1055 | doubleBufferingEnabled = aFlag; |
| 1056 | PaintManager paintManager = getPaintManager(); |
| 1057 | if (!aFlag && paintManager.getClass() != PaintManager.class) { |
| 1058 | setPaintManager(new PaintManager()); |
| 1059 | } |
| 1060 | } |
| 1061 | |
| 1062 | /** |
| 1063 | * Returns true if this RepaintManager is double buffered. |
| 1064 | * The default value for this property may vary from platform |
| 1065 | * to platform. On platforms where native double buffering |
| 1066 | * is supported in the AWT, the default value will be <code>false</code> |
| 1067 | * to avoid unnecessary buffering in Swing. |
| 1068 | * On platforms where native double buffering is not supported, |
| 1069 | * the default value will be <code>true</code>. |
| 1070 | * |
| 1071 | * @return true if this object is double buffered |
| 1072 | */ |
| 1073 | public boolean isDoubleBufferingEnabled() { |
| 1074 | return doubleBufferingEnabled; |
| 1075 | } |
| 1076 | |
| 1077 | /** |
| 1078 | * This resets the double buffer. Actually, it marks the double buffer |
| 1079 | * as invalid, the double buffer will then be recreated on the next |
| 1080 | * invocation of getOffscreenBuffer. |
| 1081 | */ |
| 1082 | void resetDoubleBuffer() { |
| 1083 | if (standardDoubleBuffer != null) { |
| 1084 | standardDoubleBuffer.needsReset = true; |
| 1085 | } |
| 1086 | } |
| 1087 | |
| 1088 | /** |
| 1089 | * This resets the volatile double buffer. |
| 1090 | */ |
| 1091 | void resetVolatileDoubleBuffer(GraphicsConfiguration gc) { |
| 1092 | Image image = volatileMap.remove(gc); |
| 1093 | if (image != null) { |
| 1094 | image.flush(); |
| 1095 | } |
| 1096 | } |
| 1097 | |
| 1098 | /** |
| 1099 | * Returns true if we should use the <code>Image</code> returned |
| 1100 | * from <code>getVolatileOffscreenBuffer</code> to do double buffering. |
| 1101 | */ |
| 1102 | boolean useVolatileDoubleBuffer() { |
| 1103 | return volatileImageBufferEnabled; |
| 1104 | } |
| 1105 | |
| 1106 | /** |
| 1107 | * Returns true if the current thread is the thread painting. This |
| 1108 | * will return false if no threads are painting. |
| 1109 | */ |
| 1110 | private synchronized boolean isPaintingThread() { |
| 1111 | return (Thread.currentThread() == paintThread); |
| 1112 | } |
| 1113 | // |
| 1114 | // Paint methods. You very, VERY rarely need to invoke these. |
| 1115 | // They are invoked directly from JComponent's painting code and |
| 1116 | // when painting happens outside the normal flow: DefaultDesktopManager |
| 1117 | // and JViewport. If you end up needing these methods in other places be |
| 1118 | // careful that you don't get stuck in a paint loop. |
| 1119 | // |
| 1120 | |
| 1121 | /** |
| 1122 | * Paints a region of a component |
| 1123 | * |
| 1124 | * @param paintingComponent Component to paint |
| 1125 | * @param bufferComponent Component to obtain buffer for |
| 1126 | * @param g Graphics to paint to |
| 1127 | * @param x X-coordinate |
| 1128 | * @param y Y-coordinate |
| 1129 | * @param w Width |
| 1130 | * @param h Height |
| 1131 | */ |
| 1132 | void paint(JComponent paintingComponent, |
| 1133 | JComponent bufferComponent, Graphics g, |
| 1134 | int x, int y, int w, int h) { |
| 1135 | PaintManager paintManager = getPaintManager(); |
| 1136 | if (!isPaintingThread()) { |
| 1137 | // We're painting to two threads at once. PaintManager deals |
| 1138 | // with this a bit better than BufferStrategyPaintManager, use |
| 1139 | // it to avoid possible exceptions/corruption. |
| 1140 | if (paintManager.getClass() != PaintManager.class) { |
| 1141 | paintManager = new PaintManager(); |
| 1142 | paintManager.repaintManager = this; |
| 1143 | } |
| 1144 | } |
| 1145 | if (!paintManager.paint(paintingComponent, bufferComponent, g, |
| 1146 | x, y, w, h)) { |
| 1147 | g.setClip(x, y, w, h); |
| 1148 | paintingComponent.paintToOffscreen(g, x, y, w, h, x + w, y + h); |
| 1149 | } |
| 1150 | } |
| 1151 | |
| 1152 | /** |
| 1153 | * Does a copy area on the specified region. |
| 1154 | * |
| 1155 | * @param clip Whether or not the copyArea needs to be clipped to the |
| 1156 | * Component's bounds. |
| 1157 | */ |
| 1158 | void copyArea(JComponent c, Graphics g, int x, int y, int w, int h, |
| 1159 | int deltaX, int deltaY, boolean clip) { |
| 1160 | getPaintManager().copyArea(c, g, x, y, w, h, deltaX, deltaY, clip); |
| 1161 | } |
| 1162 | |
| 1163 | /** |
| 1164 | * Invoked prior to any paint/copyArea method calls. This will |
| 1165 | * be followed by an invocation of <code>endPaint</code>. |
| 1166 | * <b>WARNING</b>: Callers of this method need to wrap the call |
| 1167 | * in a <code>try/finally</code>, otherwise if an exception is thrown |
| 1168 | * during the course of painting the RepaintManager may |
| 1169 | * be left in a state in which the screen is not updated, eg: |
| 1170 | * <pre> |
| 1171 | * repaintManager.beginPaint(); |
| 1172 | * try { |
| 1173 | * repaintManager.paint(...); |
| 1174 | * } finally { |
| 1175 | * repaintManager.endPaint(); |
| 1176 | * } |
| 1177 | * </pre> |
| 1178 | */ |
| 1179 | void beginPaint() { |
| 1180 | boolean multiThreadedPaint = false; |
| 1181 | int paintDepth = 0; |
| 1182 | Thread currentThread = Thread.currentThread(); |
| 1183 | synchronized(this) { |
| 1184 | paintDepth = this.paintDepth; |
| 1185 | if (paintThread == null || currentThread == paintThread) { |
| 1186 | paintThread = currentThread; |
| 1187 | this.paintDepth++; |
| 1188 | } else { |
| 1189 | multiThreadedPaint = true; |
| 1190 | } |
| 1191 | } |
| 1192 | if (!multiThreadedPaint && paintDepth == 0) { |
| 1193 | getPaintManager().beginPaint(); |
| 1194 | } |
| 1195 | } |
| 1196 | |
| 1197 | /** |
| 1198 | * Invoked after <code>beginPaint</code> has been invoked. |
| 1199 | */ |
| 1200 | void endPaint() { |
| 1201 | if (isPaintingThread()) { |
| 1202 | PaintManager paintManager = null; |
| 1203 | synchronized(this) { |
| 1204 | if (--paintDepth == 0) { |
| 1205 | paintManager = getPaintManager(); |
| 1206 | } |
| 1207 | } |
| 1208 | if (paintManager != null) { |
| 1209 | paintManager.endPaint(); |
| 1210 | synchronized(this) { |
| 1211 | paintThread = null; |
| 1212 | } |
| 1213 | } |
| 1214 | } |
| 1215 | } |
| 1216 | |
| 1217 | /** |
| 1218 | * If possible this will show a previously rendered portion of |
| 1219 | * a Component. If successful, this will return true, otherwise false. |
| 1220 | * <p> |
| 1221 | * WARNING: This method is invoked from the native toolkit thread, be |
| 1222 | * very careful as to what methods this invokes! |
| 1223 | */ |
| 1224 | boolean show(Container c, int x, int y, int w, int h) { |
| 1225 | return getPaintManager().show(c, x, y, w, h); |
| 1226 | } |
| 1227 | |
| 1228 | /** |
| 1229 | * Invoked when the doubleBuffered or useTrueDoubleBuffering |
| 1230 | * properties of a JRootPane change. This may come in on any thread. |
| 1231 | */ |
| 1232 | void doubleBufferingChanged(JRootPane rootPane) { |
| 1233 | getPaintManager().doubleBufferingChanged(rootPane); |
| 1234 | } |
| 1235 | |
| 1236 | /** |
| 1237 | * Sets the <code>PaintManager</code> that is used to handle all |
| 1238 | * double buffered painting. |
| 1239 | * |
| 1240 | * @param paintManager The PaintManager to use. Passing in null indicates |
| 1241 | * the fallback PaintManager should be used. |
| 1242 | */ |
| 1243 | void setPaintManager(PaintManager paintManager) { |
| 1244 | if (paintManager == null) { |
| 1245 | paintManager = new PaintManager(); |
| 1246 | } |
| 1247 | PaintManager oldPaintManager; |
| 1248 | synchronized(this) { |
| 1249 | oldPaintManager = this.paintManager; |
| 1250 | this.paintManager = paintManager; |
| 1251 | paintManager.repaintManager = this; |
| 1252 | } |
| 1253 | if (oldPaintManager != null) { |
| 1254 | oldPaintManager.dispose(); |
| 1255 | } |
| 1256 | } |
| 1257 | |
| 1258 | private synchronized PaintManager getPaintManager() { |
| 1259 | if (paintManager == null) { |
| 1260 | PaintManager paintManager = null; |
| 1261 | if (doubleBufferingEnabled && !nativeDoubleBuffering) { |
| 1262 | switch (bufferStrategyType) { |
| 1263 | case BUFFER_STRATEGY_NOT_SPECIFIED: |
| 1264 | if (((SunToolkit)Toolkit.getDefaultToolkit()). |
| 1265 | useBufferPerWindow()) { |
| 1266 | paintManager = new BufferStrategyPaintManager(); |
| 1267 | } |
| 1268 | break; |
| 1269 | case BUFFER_STRATEGY_SPECIFIED_ON: |
| 1270 | paintManager = new BufferStrategyPaintManager(); |
| 1271 | break; |
| 1272 | default: |
| 1273 | break; |
| 1274 | } |
| 1275 | } |
| 1276 | // null case handled in setPaintManager |
| 1277 | setPaintManager(paintManager); |
| 1278 | } |
| 1279 | return paintManager; |
| 1280 | } |
| 1281 | |
| 1282 | private void scheduleProcessingRunnable() { |
| 1283 | scheduleProcessingRunnable(AppContext.getAppContext()); |
| 1284 | } |
| 1285 | |
| 1286 | private void scheduleProcessingRunnable(AppContext context) { |
| 1287 | if (processingRunnable.markPending()) { |
| 1288 | SunToolkit.getSystemEventQueueImplPP(context). |
| 1289 | postEvent(new InvocationEvent(Toolkit.getDefaultToolkit(), |
| 1290 | processingRunnable)); |
| 1291 | } |
| 1292 | } |
| 1293 | |
| 1294 | |
| 1295 | /** |
| 1296 | * PaintManager is used to handle all double buffered painting for |
| 1297 | * Swing. Subclasses should call back into the JComponent method |
| 1298 | * <code>paintToOffscreen</code> to handle the actual painting. |
| 1299 | */ |
| 1300 | static class PaintManager { |
| 1301 | /** |
| 1302 | * RepaintManager the PaintManager has been installed on. |
| 1303 | */ |
| 1304 | protected RepaintManager repaintManager; |
| 1305 | boolean isRepaintingRoot; |
| 1306 | |
| 1307 | /** |
| 1308 | * Paints a region of a component |
| 1309 | * |
| 1310 | * @param paintingComponent Component to paint |
| 1311 | * @param bufferComponent Component to obtain buffer for |
| 1312 | * @param g Graphics to paint to |
| 1313 | * @param x X-coordinate |
| 1314 | * @param y Y-coordinate |
| 1315 | * @param w Width |
| 1316 | * @param h Height |
| 1317 | * @return true if painting was successful. |
| 1318 | */ |
| 1319 | public boolean paint(JComponent paintingComponent, |
| 1320 | JComponent bufferComponent, Graphics g, |
| 1321 | int x, int y, int w, int h) { |
| 1322 | // First attempt to use VolatileImage buffer for performance. |
| 1323 | // If this fails (which should rarely occur), fallback to a |
| 1324 | // standard Image buffer. |
| 1325 | boolean paintCompleted = false; |
| 1326 | Image offscreen; |
| 1327 | if (repaintManager.useVolatileDoubleBuffer() && |
| 1328 | (offscreen = getValidImage(repaintManager. |
| 1329 | getVolatileOffscreenBuffer(bufferComponent, w, h))) != null) { |
| 1330 | VolatileImage vImage = (java.awt.image.VolatileImage)offscreen; |
| 1331 | GraphicsConfiguration gc = bufferComponent. |
| 1332 | getGraphicsConfiguration(); |
| 1333 | for (int i = 0; !paintCompleted && |
| 1334 | i < RepaintManager.VOLATILE_LOOP_MAX; i++) { |
| 1335 | if (vImage.validate(gc) == |
| 1336 | VolatileImage.IMAGE_INCOMPATIBLE) { |
| 1337 | repaintManager.resetVolatileDoubleBuffer(gc); |
| 1338 | offscreen = repaintManager.getVolatileOffscreenBuffer( |
| 1339 | bufferComponent,w, h); |
| 1340 | vImage = (java.awt.image.VolatileImage)offscreen; |
| 1341 | } |
| 1342 | paintDoubleBuffered(paintingComponent, vImage, g, x, y, |
| 1343 | w, h); |
| 1344 | paintCompleted = !vImage.contentsLost(); |
| 1345 | } |
| 1346 | } |
| 1347 | // VolatileImage painting loop failed, fallback to regular |
| 1348 | // offscreen buffer |
| 1349 | if (!paintCompleted && (offscreen = getValidImage( |
| 1350 | repaintManager.getOffscreenBuffer( |
| 1351 | bufferComponent, w, h))) != null) { |
| 1352 | paintDoubleBuffered(paintingComponent, offscreen, g, x, y, w, |
| 1353 | h); |
| 1354 | paintCompleted = true; |
| 1355 | } |
| 1356 | return paintCompleted; |
| 1357 | } |
| 1358 | |
| 1359 | /** |
| 1360 | * Does a copy area on the specified region. |
| 1361 | */ |
| 1362 | public void copyArea(JComponent c, Graphics g, int x, int y, int w, |
| 1363 | int h, int deltaX, int deltaY, boolean clip) { |
| 1364 | g.copyArea(x, y, w, h, deltaX, deltaY); |
| 1365 | } |
| 1366 | |
| 1367 | /** |
| 1368 | * Invoked prior to any calls to paint or copyArea. |
| 1369 | */ |
| 1370 | public void beginPaint() { |
| 1371 | } |
| 1372 | |
| 1373 | /** |
| 1374 | * Invoked to indicate painting has been completed. |
| 1375 | */ |
| 1376 | public void endPaint() { |
| 1377 | } |
| 1378 | |
| 1379 | /** |
| 1380 | * Shows a region of a previously rendered component. This |
| 1381 | * will return true if successful, false otherwise. The default |
| 1382 | * implementation returns false. |
| 1383 | */ |
| 1384 | public boolean show(Container c, int x, int y, int w, int h) { |
| 1385 | return false; |
| 1386 | } |
| 1387 | |
| 1388 | /** |
| 1389 | * Invoked when the doubleBuffered or useTrueDoubleBuffering |
| 1390 | * properties of a JRootPane change. This may come in on any thread. |
| 1391 | */ |
| 1392 | public void doubleBufferingChanged(JRootPane rootPane) { |
| 1393 | } |
| 1394 | |
| 1395 | /** |
| 1396 | * Paints a portion of a component to an offscreen buffer. |
| 1397 | */ |
| 1398 | protected void paintDoubleBuffered(JComponent c, Image image, |
| 1399 | Graphics g, int clipX, int clipY, |
| 1400 | int clipW, int clipH) { |
| 1401 | Graphics osg = image.getGraphics(); |
| 1402 | int bw = Math.min(clipW, image.getWidth(null)); |
| 1403 | int bh = Math.min(clipH, image.getHeight(null)); |
| 1404 | int x,y,maxx,maxy; |
| 1405 | |
| 1406 | try { |
| 1407 | for(x = clipX, maxx = clipX+clipW; x < maxx ; x += bw ) { |
| 1408 | for(y=clipY, maxy = clipY + clipH; y < maxy ; y += bh) { |
| 1409 | osg.translate(-x, -y); |
| 1410 | osg.setClip(x,y,bw,bh); |
| 1411 | c.paintToOffscreen(osg, x, y, bw, bh, maxx, maxy); |
| 1412 | g.setClip(x, y, bw, bh); |
| 1413 | g.drawImage(image, x, y, c); |
| 1414 | osg.translate(x, y); |
| 1415 | } |
| 1416 | } |
| 1417 | } finally { |
| 1418 | osg.dispose(); |
| 1419 | } |
| 1420 | } |
| 1421 | |
| 1422 | /** |
| 1423 | * If <code>image</code> is non-null with a positive size it |
| 1424 | * is returned, otherwise null is returned. |
| 1425 | */ |
| 1426 | private Image getValidImage(Image image) { |
| 1427 | if (image != null && image.getWidth(null) > 0 && |
| 1428 | image.getHeight(null) > 0) { |
| 1429 | return image; |
| 1430 | } |
| 1431 | return null; |
| 1432 | } |
| 1433 | |
| 1434 | /** |
| 1435 | * Schedules a repaint for the specified component. This differs |
| 1436 | * from <code>root.repaint</code> in that if the RepaintManager is |
| 1437 | * currently processing paint requests it'll process this request |
| 1438 | * with the current set of requests. |
| 1439 | */ |
| 1440 | protected void repaintRoot(JComponent root) { |
| 1441 | assert (repaintManager.repaintRoot == null); |
| 1442 | if (repaintManager.painting) { |
| 1443 | repaintManager.repaintRoot = root; |
| 1444 | } |
| 1445 | else { |
| 1446 | root.repaint(); |
| 1447 | } |
| 1448 | } |
| 1449 | |
| 1450 | /** |
| 1451 | * Returns true if the component being painted is the root component |
| 1452 | * that was previously passed to <code>repaintRoot</code>. |
| 1453 | */ |
| 1454 | protected boolean isRepaintingRoot() { |
| 1455 | return isRepaintingRoot; |
| 1456 | } |
| 1457 | |
| 1458 | /** |
| 1459 | * Cleans up any state. After invoked the PaintManager will no |
| 1460 | * longer be used anymore. |
| 1461 | */ |
| 1462 | protected void dispose() { |
| 1463 | } |
| 1464 | } |
| 1465 | |
| 1466 | |
| 1467 | private class DoubleBufferInfo { |
| 1468 | public Image image; |
| 1469 | public Dimension size; |
| 1470 | public boolean needsReset = false; |
| 1471 | } |
| 1472 | |
| 1473 | |
| 1474 | /** |
| 1475 | * Listener installed to detect display changes. When display changes, |
| 1476 | * schedules a callback to notify all RepaintManagers of the display |
| 1477 | * changes. Only one DisplayChangedHandler is ever installed. The |
| 1478 | * singleton instance will schedule notification for all AppContexts. |
| 1479 | */ |
| 1480 | private static final class DisplayChangedHandler implements |
| 1481 | DisplayChangedListener { |
| 1482 | public void displayChanged() { |
| 1483 | scheduleDisplayChanges(); |
| 1484 | } |
| 1485 | |
| 1486 | public void paletteChanged() { |
| 1487 | } |
| 1488 | |
| 1489 | private void scheduleDisplayChanges() { |
| 1490 | // To avoid threading problems, we notify each RepaintManager |
| 1491 | // on the thread it was created on. |
| 1492 | for (Object c : AppContext.getAppContexts()) { |
| 1493 | AppContext context = (AppContext) c; |
| 1494 | synchronized(context) { |
| 1495 | if (!context.isDisposed()) { |
| 1496 | EventQueue eventQueue = (EventQueue)context.get( |
| 1497 | AppContext.EVENT_QUEUE_KEY); |
| 1498 | if (eventQueue != null) { |
| 1499 | eventQueue.postEvent(new InvocationEvent( |
| 1500 | Toolkit.getDefaultToolkit(), |
| 1501 | new DisplayChangedRunnable())); |
| 1502 | } |
| 1503 | } |
| 1504 | } |
| 1505 | } |
| 1506 | } |
| 1507 | } |
| 1508 | |
| 1509 | |
| 1510 | private static final class DisplayChangedRunnable implements Runnable { |
| 1511 | public void run() { |
| 1512 | RepaintManager.currentManager((JComponent)null).displayChanged(); |
| 1513 | } |
| 1514 | } |
| 1515 | |
| 1516 | |
| 1517 | /** |
| 1518 | * Runnable used to process all repaint/revalidate requests. |
| 1519 | */ |
| 1520 | private final class ProcessingRunnable implements Runnable { |
| 1521 | // If true, we're wainting on the EventQueue. |
| 1522 | private boolean pending; |
| 1523 | |
| 1524 | /** |
| 1525 | * Marks this processing runnable as pending. If this was not |
| 1526 | * already marked as pending, true is returned. |
| 1527 | */ |
| 1528 | public synchronized boolean markPending() { |
| 1529 | if (!pending) { |
| 1530 | pending = true; |
| 1531 | return true; |
| 1532 | } |
| 1533 | return false; |
| 1534 | } |
| 1535 | |
| 1536 | public void run() { |
| 1537 | synchronized (this) { |
| 1538 | pending = false; |
| 1539 | } |
| 1540 | // First pass, flush any heavy paint events into real paint |
| 1541 | // events. If there are pending heavy weight requests this will |
| 1542 | // result in q'ing this request up one more time. As |
| 1543 | // long as no other requests come in between now and the time |
| 1544 | // the second one is processed nothing will happen. This is not |
| 1545 | // ideal, but the logic needed to suppress the second request is |
| 1546 | // more headache than it's worth. |
| 1547 | scheduleHeavyWeightPaints(); |
| 1548 | // Do the actual validation and painting. |
| 1549 | validateInvalidComponents(); |
| 1550 | prePaintDirtyRegions(); |
| 1551 | } |
| 1552 | } |
| 1553 | } |