1 /*
2 * Copyright (c) 2011, 2012, Oracle and/or its affiliates. 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26
27 package sun.lwawt;
28
29 import java.awt.*;
30
31 import java.awt.dnd.DropTarget;
32 import java.awt.dnd.peer.DropTargetPeer;
33 import java.awt.event.*;
34
35 import java.awt.image.ColorModel;
36 import java.awt.image.ImageObserver;
37 import java.awt.image.ImageProducer;
38 import java.awt.image.VolatileImage;
39
40 import java.awt.peer.ComponentPeer;
41 import java.awt.peer.ContainerPeer;
42
43 import java.util.concurrent.atomic.AtomicBoolean;
44 import java.lang.reflect.Field;
45 import java.security.AccessController;
46 import java.security.PrivilegedAction;
47
48 import sun.awt.*;
49
50 import sun.awt.event.IgnorePaintEvent;
51
52 import sun.awt.image.SunVolatileImage;
53 import sun.awt.image.ToolkitImage;
54
55 import sun.java2d.SunGraphics2D;
56 import sun.java2d.opengl.OGLRenderQueue;
57 import sun.java2d.pipe.Region;
58
59 import javax.swing.JComponent;
60 import javax.swing.SwingUtilities;
61 import javax.swing.RepaintManager;
62
63 import sun.lwawt.macosx.CDropTarget;
64
65 import com.sun.java.swing.SwingUtilities3;
66
67 public abstract class LWComponentPeer<T extends Component, D extends JComponent>
68 implements ComponentPeer, DropTargetPeer {
69 // State lock is to be used for modifications to this
70 // peer's fields (e.g. bounds, background, font, etc.)
71 // It should be the last lock in the lock chain
72 private final Object stateLock =
73 new StringBuilder("LWComponentPeer.stateLock");
74
75 // The lock to operate with the peers hierarchy. AWT tree
76 // lock is not used as there are many peers related ops
77 // to be done on the toolkit thread, and we don't want to
78 // depend on a public lock on this thread
79 private final static Object peerTreeLock =
80 new StringBuilder("LWComponentPeer.peerTreeLock");
81
82 /**
83 * A custom tree-lock used for the hierarchy of the delegate Swing
84 * components.
85 * The lock synchronizes access to the delegate
86 * internal state. Think of it as a 'virtual EDT'.
87 */
88 // private final Object delegateTreeLock =
89 // new StringBuilder("LWComponentPeer.delegateTreeLock");
90
91 private T target;
92
93 // Container peer. It may not be the peer of the target's direct
94 // parent, for example, in the case of hw/lw mixing. However,
95 // let's skip this scenario for the time being. We also assume
96 // the container peer is not null, which might also be false if
97 // addNotify() is called for a component outside of the hierarchy.
98 // The exception is LWWindowPeers: their parents are always null
99 private LWContainerPeer containerPeer;
100
101 // Handy reference to the top-level window peer. Window peer is
102 // borrowed from the containerPeer in constructor, and should also
103 // be updated when the component is reparented to another container
104 private LWWindowPeer windowPeer;
105
106 private AtomicBoolean disposed = new AtomicBoolean(false);
107
108 // Bounds are relative to parent peer
109 private Rectangle bounds = new Rectangle();
110 private Region region;
111
112 // Component state. Should be accessed under the state lock
113 private boolean visible = false;
114 private boolean enabled = true;
115
116 private Color background;
117 private Color foreground;
118 private Font font;
119
120 // Paint area to coalesce all the paint events and store
121 // the target dirty area
122 private RepaintArea targetPaintArea;
123
124 // private volatile boolean paintPending;
125 private volatile boolean isLayouting;
126
127 private D delegate = null;
128 private Container delegateContainer;
129 private Component delegateDropTarget;
130 private final Object dropTargetLock = new Object();
131
132 private int fNumDropTargets = 0;
133 private CDropTarget fDropTarget = null;
134
135 private PlatformComponent platformComponent;
136
137 private final class DelegateContainer extends Container {
138 {
139 enableEvents(0xFFFFFFFF);
140 }
141
142 DelegateContainer() {
143 super();
144 }
145
146 @Override
147 public boolean isLightweight() {
148 return false;
149 }
150
151 @Override
152 public Point getLocation() {
153 return getLocationOnScreen();
154 }
155
156 @Override
157 public Point getLocationOnScreen() {
158 return LWComponentPeer.this.getLocationOnScreen();
159 }
160
161 @Override
162 public int getX() {
163 return getLocation().x;
164 }
165
166 @Override
167 public int getY() {
168 return getLocation().y;
169 }
170 }
171
172 public LWComponentPeer(T target, PlatformComponent platformComponent) {
173 this.target = target;
174 this.platformComponent = platformComponent;
175
176 initializeContainerPeer();
177 // Container peer is always null for LWWindowPeers, so
178 // windowPeer is always null for them as well. On the other
179 // hand, LWWindowPeer shouldn't use windowPeer at all
180 if (containerPeer != null) {
181 windowPeer = containerPeer.getWindowPeerOrSelf();
182 }
183 // don't bother about z-order here as updateZOrder()
184 // will be called from addNotify() later anyway
185 if (containerPeer != null) {
186 containerPeer.addChildPeer(this);
187 }
188
189 // the delegate must be created after the target is set
190 AWTEventListener toolkitListener = null;
191 synchronized (Toolkit.getDefaultToolkit()) {
192 try {
193 toolkitListener = getToolkitAWTEventListener();
194 setToolkitAWTEventListener(null);
195
196 synchronized (getDelegateLock()) {
197 delegate = createDelegate();
198 if (delegate != null) {
199 delegateContainer = new DelegateContainer();
200 delegateContainer.add(delegate);
201 delegateContainer.addNotify();
202 delegate.addNotify();
203 } else {
204 return;
205 }
206 }
207
208 } finally {
209 setToolkitAWTEventListener(toolkitListener);
210 }
211
212 // todo swing: later on we will probably have one global RM
213 SwingUtilities3.setDelegateRepaintManager(delegate, new RepaintManager() {
214 @Override
215 public void addDirtyRegion(final JComponent c, final int x, final int y, final int w, final int h) {
216 repaintPeer(SwingUtilities.convertRectangle(
217 c, new Rectangle(x, y, w, h), getDelegate()));
218 }
219 });
220 }
221 }
222
223 /**
224 * This method must be called under Toolkit.getDefaultToolkit() lock
225 * and followed by setToolkitAWTEventListener()
226 */
227 protected final AWTEventListener getToolkitAWTEventListener() {
228 return AccessController.doPrivileged(new PrivilegedAction<AWTEventListener>() {
229 public AWTEventListener run() {
230 Toolkit toolkit = Toolkit.getDefaultToolkit();
231 try {
232 Field field = Toolkit.class.getDeclaredField("eventListener");
233 field.setAccessible(true);
234 return (AWTEventListener) field.get(toolkit);
235 } catch (Exception e) {
236 throw new InternalError(e.toString());
237 }
238 }
239 });
240 }
241
242 protected final void setToolkitAWTEventListener(final AWTEventListener listener) {
243 AccessController.doPrivileged(new PrivilegedAction<Void>() {
244 public Void run() {
245 Toolkit toolkit = Toolkit.getDefaultToolkit();
246 try {
247 Field field = Toolkit.class.getDeclaredField("eventListener");
248 field.setAccessible(true);
249 field.set(toolkit, listener);
250 } catch (Exception e) {
251 throw new InternalError(e.toString());
252 }
253 return null;
254 }
255 });
256 }
257
258 /**
259 * This method is called under getDelegateLock().
260 * Overridden in subclasses.
261 */
262 protected D createDelegate() {
263 return null;
264 }
265
266 protected final D getDelegate() {
267 synchronized (getStateLock()) {
268 return delegate;
269 }
270 }
271
272 protected Component getDelegateFocusOwner() {
273 return getDelegate();
274 }
275
276 /*
277 * Initializes this peer by fetching all the properties from the target.
278 * The call to initialize() is not placed to LWComponentPeer ctor to
279 * let the subclass ctor to finish completely first. Instead, it's the
280 * LWToolkit object who is responsible for initialization.
281 */
282 public void initialize() {
283 platformComponent.initialize(target, this, getPlatformWindow());
284 targetPaintArea = new LWRepaintArea();
285 if (getDelegate() != null) {
286 synchronized (getDelegateLock()) {
287 resetColorsAndFont(delegate);
288 getDelegate().setOpaque(true);
289 }
290 }
291 setBackground(target.getBackground());
292 setForeground(target.getForeground());
293 setFont(target.getFont());
294 setBounds(target.getBounds());
295 setEnabled(target.isEnabled());
296 setVisible(target.isVisible());
297 }
298
299 private static void resetColorsAndFont(final Container c) {
300 c.setBackground(null);
301 c.setForeground(null);
302 c.setFont(null);
303 for (int i = 0; i < c.getComponentCount(); i++) {
304 resetColorsAndFont((Container) c.getComponent(i));
305 }
306 }
307
308 final Object getStateLock() {
309 return stateLock;
310 }
311
312 // Synchronize all operations with the Swing delegates under
313 // AWT tree lock, using a new separate lock to synchronize
314 // access to delegates may lead deadlocks
315 final Object getDelegateLock() {
316 //return delegateTreeLock;
317 return getTarget().getTreeLock();
318 }
319
320 protected final static Object getPeerTreeLock() {
321 return peerTreeLock;
322 }
323
324 final T getTarget() {
325 return target;
326 }
327
328 // Just a helper method
329 // Returns the window peer or null if this is a window peer
330 protected final LWWindowPeer getWindowPeer() {
331 return windowPeer;
332 }
333
334 // Returns the window peer or 'this' if this is a window peer
335 protected LWWindowPeer getWindowPeerOrSelf() {
336 return getWindowPeer();
337 }
338
339 // Just a helper method
340 protected final LWContainerPeer getContainerPeer() {
341 return containerPeer;
342 }
343
344 // Just a helper method
345 // Overridden in LWWindowPeer to skip containerPeer initialization
346 protected void initializeContainerPeer() {
347 Container parent = LWToolkit.getNativeContainer(target);
348 if (parent != null) {
349 containerPeer = (LWContainerPeer) LWToolkit.targetToPeer(parent);
350 }
351 }
352
353 public PlatformWindow getPlatformWindow() {
354 LWWindowPeer windowPeer = getWindowPeer();
355 return windowPeer.getPlatformWindow();
356 }
357
358 protected AppContext getAppContext() {
359 return SunToolkit.targetToAppContext(getTarget());
360 }
361
362 // ---- PEER METHODS ---- //
363
364 @Override
365 public Toolkit getToolkit() {
366 return LWToolkit.getLWToolkit();
367 }
368
369 // Just a helper method
370 public LWToolkit getLWToolkit() {
371 return LWToolkit.getLWToolkit();
372 }
373
374 @Override
375 public final void dispose() {
376 if (disposed.compareAndSet(false, true)) {
377 disposeImpl();
378 }
379 }
380
381 protected void disposeImpl() {
382 LWContainerPeer cp = getContainerPeer();
383 if (cp != null) {
384 cp.removeChildPeer(this);
385 }
386 platformComponent.dispose();
387 LWToolkit.targetDisposedPeer(getTarget(), this);
388 }
389
390 public final boolean isDisposed() {
391 return disposed.get();
392 }
393
394 /*
395 * GraphicsConfiguration is borrowed from the parent peer. The
396 * return value must not be null.
397 *
398 * Overridden in LWWindowPeer.
399 */
400 @Override
401 public GraphicsConfiguration getGraphicsConfiguration() {
402 // Don't check windowPeer for null as it can only happen
403 // for windows, but this method is overridden in
404 // LWWindowPeer and doesn't call super()
405 return getWindowPeer().getGraphicsConfiguration();
406 }
407
408 /*
409 * Overridden in LWWindowPeer to replace its surface
410 * data and back buffer.
411 */
412 @Override
413 public boolean updateGraphicsData(GraphicsConfiguration gc) {
414 // TODO: not implemented
415 // throw new RuntimeException("Has not been implemented yet.");
416 return false;
417 }
418
419 @Override
420 public final Graphics getGraphics() {
421 Graphics g = getWindowPeerOrSelf().isOpaque() ? getOnscreenGraphics()
422 : getOffscreenGraphics();
423 if (g != null) {
424 synchronized (getPeerTreeLock()){
425 applyConstrain(g);
426 }
427 }
428 return g;
429 }
430
431 /*
432 * Peer Graphics is borrowed from the parent peer, while
433 * foreground and background colors and font are specific to
434 * this peer.
435 */
436 public final Graphics getOnscreenGraphics() {
437 final LWWindowPeer wp = getWindowPeerOrSelf();
438 return wp.getOnscreenGraphics(getForeground(), getBackground(),
439 getFont());
440 }
441
442 public final Graphics getOffscreenGraphics() {
443 final LWWindowPeer wp = getWindowPeerOrSelf();
444
445 return wp.getOffscreenGraphics(getForeground(), getBackground(),
446 getFont());
447 }
448
449 private void applyConstrain(final Graphics g) {
450 final SunGraphics2D sg2d = (SunGraphics2D) g;
451 final Rectangle constr = localToWindow(getSize());
452 // translate and set rectangle constrain.
453 sg2d.constrain(constr.x, constr.y, constr.width, constr.height);
454 // set region constrain.
455 //sg2d.constrain(getVisibleRegion());
456 SG2DConstraint(sg2d, getVisibleRegion());
457 }
458
459 //TODO Move this method to SG2D?
460 private void SG2DConstraint(final SunGraphics2D sg2d, Region r) {
461 sg2d.constrainX = sg2d.transX;
462 sg2d.constrainY = sg2d.transY;
463
464 Region c = sg2d.constrainClip;
465 if ((sg2d.constrainX | sg2d.constrainY) != 0) {
466 r = r.getTranslatedRegion(sg2d.constrainX, sg2d.constrainY);
467 }
468 if (c == null) {
469 c = r;
470 } else {
471 c = c.getIntersection(r);
472 if (c == sg2d.constrainClip) {
473 // Common case to ignore
474 return;
475 }
476 }
477 sg2d.constrainClip = c;
478 //validateCompClip() forced call.
479 sg2d.setDevClip(r.getLoX(), r.getLoY(), r.getWidth(), r.getHeight());
480 }
481
482 public Region getVisibleRegion() {
483 return computeVisibleRect(this, getRegion());
484 }
485
486 static final Region computeVisibleRect(LWComponentPeer c, Region region) {
487 final LWContainerPeer p = c.getContainerPeer();
488 if (p != null) {
489 final Rectangle r = c.getBounds();
490 region = region.getTranslatedRegion(r.x, r.y);
491 region = region.getIntersection(p.getRegion());
492 region = region.getIntersection(p.getContentSize());
493 region = p.cutChildren(region, c);
494 region = computeVisibleRect(p, region);
495 region = region.getTranslatedRegion(-r.x, -r.y);
496 }
497 return region;
498 }
499
500 @Override
501 public ColorModel getColorModel() {
502 // Is it a correct implementation?
503 return getGraphicsConfiguration().getColorModel();
504 }
505
506 @Override
507 public void createBuffers(int numBuffers, BufferCapabilities caps)
508 throws AWTException {
509 throw new AWTException("Back buffers are only supported for " +
510 "Window or Canvas components.");
511 }
512
513 /*
514 * To be overridden in LWWindowPeer and LWCanvasPeer.
515 */
516 @Override
517 public Image getBackBuffer() {
518 // Return null or throw AWTException?
519 return null;
520 }
521
522 @Override
523 public void flip(int x1, int y1, int x2, int y2,
524 BufferCapabilities.FlipContents flipAction) {
525 // Skip silently or throw AWTException?
526 }
527
528 @Override
529 public void destroyBuffers() {
530 // Do nothing
531 }
532
533 // Helper method
534 public void setBounds(Rectangle r) {
535 setBounds(r.x, r.y, r.width, r.height, SET_BOUNDS);
536 }
537
538 /**
539 * This method could be called on the toolkit thread.
540 */
541 @Override
542 public void setBounds(int x, int y, int w, int h, int op) {
543 setBounds(x, y, w, h, op, true, false);
544 }
545
546 protected void setBounds(int x, int y, int w, int h, int op, boolean notify,
547 final boolean updateTarget) {
548 Rectangle oldBounds;
549 synchronized (getStateLock()) {
550 oldBounds = new Rectangle(bounds);
551 if ((op & (SET_LOCATION | SET_BOUNDS)) != 0) {
552 bounds.x = x;
553 bounds.y = y;
554 }
555 if ((op & (SET_SIZE | SET_BOUNDS)) != 0) {
556 bounds.width = w;
557 bounds.height = h;
558 }
559 }
560 boolean moved = (oldBounds.x != x) || (oldBounds.y != y);
561 boolean resized = (oldBounds.width != w) || (oldBounds.height != h);
562 if (!moved && !resized) {
563 return;
564 }
565 final D delegate = getDelegate();
566 if (delegate != null) {
567 synchronized (getDelegateLock()) {
568 delegateContainer.setBounds(0, 0, w, h);
569 delegate.setBounds(delegateContainer.getBounds());
570 // TODO: the following means that the delegateContainer NEVER gets validated. That's WRONG!
571 delegate.validate();
572 }
573 }
574
575 final Point locationInWindow = localToWindow(0, 0);
576 platformComponent.setBounds(locationInWindow.x, locationInWindow.y, w,
577 h);
578 if (notify) {
579 repaintOldNewBounds(oldBounds);
580 if (resized) {
581 handleResize(w, h, updateTarget);
582 }
583 if (moved) {
584 handleMove(x, y, updateTarget);
585 }
586 }
587 }
588
589 public final Rectangle getBounds() {
590 synchronized (getStateLock()) {
591 // Return a copy to prevent subsequent modifications
592 return bounds.getBounds();
593 }
594 }
595
596 public final Rectangle getSize() {
597 synchronized (getStateLock()) {
598 // Return a copy to prevent subsequent modifications
599 return new Rectangle(bounds.width, bounds.height);
600 }
601 }
602
603 @Override
604 public Point getLocationOnScreen() {
605 Point windowLocation = getWindowPeer().getLocationOnScreen();
606 Point locationInWindow = localToWindow(0, 0);
607 return new Point(windowLocation.x + locationInWindow.x,
608 windowLocation.y + locationInWindow.y);
609 }
610
611 /**
612 * Returns the cursor of the peer, which is cursor of the target by default,
613 * but peer can override this behavior.
614 *
615 * @param p Point relative to the peer.
616 * @return Cursor of the peer or null if default cursor should be used.
617 */
618 protected Cursor getCursor(final Point p) {
619 return getTarget().getCursor();
620 }
621
622 @Override
623 public void setBackground(final Color c) {
624 final Color oldBg = getBackground();
625 if (oldBg == c || (oldBg != null && oldBg.equals(c))) {
626 return;
627 }
628 synchronized (getStateLock()) {
629 background = c;
630 }
631 final D delegate = getDelegate();
632 if (delegate != null) {
633 synchronized (getDelegateLock()) {
634 // delegate will repaint the target
635 delegate.setBackground(c);
636 }
637 } else {
638 repaintPeer();
639 }
640 }
641
642 protected final Color getBackground() {
643 synchronized (getStateLock()) {
644 return background;
645 }
646 }
647
648 @Override
649 public void setForeground(final Color c) {
650 final Color oldFg = getForeground();
651 if (oldFg == c || (oldFg != null && oldFg.equals(c))) {
652 return;
653 }
654 synchronized (getStateLock()) {
655 foreground = c;
656 }
657 final D delegate = getDelegate();
658 if (delegate != null) {
659 synchronized (getDelegateLock()) {
660 // delegate will repaint the target
661 delegate.setForeground(c);
662 }
663 } else {
664 repaintPeer();
665 }
666 }
667
668 protected final Color getForeground() {
669 synchronized (getStateLock()) {
670 return foreground;
671 }
672 }
673
674 @Override
675 public void setFont(final Font f) {
676 final Font oldF = getFont();
677 if (oldF == f || (oldF != null && oldF.equals(f))) {
678 return;
679 }
680 synchronized (getStateLock()) {
681 font = f;
682 }
683 final D delegate = getDelegate();
684 if (delegate != null) {
685 synchronized (getDelegateLock()) {
686 // delegate will repaint the target
687 delegate.setFont(f);
688 }
689 } else {
690 repaintPeer();
691 }
692 }
693
694 protected final Font getFont() {
695 synchronized (getStateLock()) {
696 return font;
697 }
698 }
699
700 @Override
701 public FontMetrics getFontMetrics(Font f) {
702 // Borrow the metrics from the top-level window
703 // return getWindowPeer().getFontMetrics(f);
704 // Obtain the metrics from the offscreen window where this peer is
705 // mostly drawn to.
706 // TODO: check for "use platform metrics" settings
707 Graphics g = getWindowPeer().getOffscreenGraphics();
708 try {
709 if (g != null) {
710 return g.getFontMetrics(f);
711 } else {
712 synchronized (getDelegateLock()) {
713 return delegateContainer.getFontMetrics(f);
714 }
715 }
716 } finally {
717 if (g != null) {
718 g.dispose();
719 }
720 }
721 }
722
723 @Override
724 public void setEnabled(final boolean e) {
725 boolean status = e;
726 final LWComponentPeer cp = getContainerPeer();
727 if (cp != null) {
728 status &= cp.isEnabled();
729 }
730 synchronized (getStateLock()) {
731 if (enabled == status) {
732 return;
733 }
734 enabled = status;
735 }
736
737 final D delegate = getDelegate();
738
739 if (delegate != null) {
740 synchronized (getDelegateLock()) {
741 delegate.setEnabled(status);
742 }
743 } else {
744 repaintPeer();
745 }
746 }
747
748 // Helper method
749 public final boolean isEnabled() {
750 synchronized (getStateLock()) {
751 return enabled;
752 }
753 }
754
755 @Override
756 public void setVisible(boolean v) {
757 synchronized (getStateLock()) {
758 if (visible == v) {
759 return;
760 }
761 visible = v;
762 }
763
764 final D delegate = getDelegate();
765
766 if (delegate != null) {
767 synchronized (getDelegateLock()) {
768 delegate.setVisible(v);
769 }
770 }
771 if (visible) {
772 repaintPeer();
773 } else {
774 repaintParent(getBounds());
775 }
776 }
777
778 // Helper method
779 public final boolean isVisible() {
780 synchronized (getStateLock()) {
781 return visible;
782 }
783 }
784
785 @Override
786 public void paint(final Graphics g) {
787 getTarget().paint(g);
788 }
789
790 @Override
791 public void print(final Graphics g) {
792 getTarget().print(g);
793 }
794
795 @Override
796 public void reparent(ContainerPeer newContainer) {
797 // TODO: not implemented
798 throw new UnsupportedOperationException("ComponentPeer.reparent()");
799 }
800
801 @Override
802 public boolean isReparentSupported() {
803 // TODO: not implemented
804 return false;
805 }
806
807 @Override
808 public void setZOrder(ComponentPeer above) {
809 LWContainerPeer cp = getContainerPeer();
810 // Don't check containerPeer for null as it can only happen
811 // for windows, but this method is overridden in
812 // LWWindowPeer and doesn't call super()
813 cp.setChildPeerZOrder(this, (LWComponentPeer) above);
814 }
815
816 @Override
817 public void coalescePaintEvent(PaintEvent e) {
818 if (!(e instanceof IgnorePaintEvent)) {
819 Rectangle r = e.getUpdateRect();
820 if ((r != null) && !r.isEmpty()) {
821 targetPaintArea.add(r, e.getID());
822 }
823 }
824 }
825
826 /*
827 * Should be overridden in subclasses which use complex Swing components.
828 */
829 @Override
830 public void layout() {
831 // TODO: not implemented
832 }
833
834 @Override
835 public boolean isObscured() {
836 // TODO: not implemented
837 return false;
838 }
839
840 @Override
841 public boolean canDetermineObscurity() {
842 // TODO: not implemented
843 return false;
844 }
845
846 /**
847 * Should be overridden in subclasses to forward the request
848 * to the Swing helper component, if required.
849 */
850 @Override
851 public Dimension getPreferredSize() {
852 // It looks like a default implementation for all toolkits
853 return getMinimumSize();
854 }
855
856 /*
857 * Should be overridden in subclasses to forward the request
858 * to the Swing helper component.
859 */
860 @Override
861 public Dimension getMinimumSize() {
862 D delegate = getDelegate();
863
864 if (delegate == null) {
865 // Is it a correct default value?
866 return getBounds().getSize();
867 } else {
868 synchronized (getDelegateLock()) {
869 return delegate.getMinimumSize();
870 }
871 }
872 }
873
874 @Override
875 public void updateCursorImmediately() {
876 getLWToolkit().getCursorManager().updateCursor();
877 }
878
879 @Override
880 public boolean isFocusable() {
881 // Overridden in focusable subclasses like buttons
882 return false;
883 }
884
885 @Override
886 public boolean requestFocus(Component lightweightChild, boolean temporary,
887 boolean focusedWindowChangeAllowed, long time,
888 CausedFocusEvent.Cause cause) {
889 if (LWKeyboardFocusManagerPeer.getInstance(getAppContext()).
890 processSynchronousLightweightTransfer(getTarget(), lightweightChild, temporary,
891 focusedWindowChangeAllowed, time)) {
892 return true;
893 }
894
895 int result = LWKeyboardFocusManagerPeer.getInstance(getAppContext()).
896 shouldNativelyFocusHeavyweight(getTarget(), lightweightChild, temporary,
897 focusedWindowChangeAllowed, time, cause);
898 switch (result) {
899 case LWKeyboardFocusManagerPeer.SNFH_FAILURE:
900 return false;
901 case LWKeyboardFocusManagerPeer.SNFH_SUCCESS_PROCEED:
902 Window parentWindow = SunToolkit.getContainingWindow(getTarget());
903 if (parentWindow == null) {
904 LWKeyboardFocusManagerPeer.removeLastFocusRequest(getTarget());
905 return false;
906 }
907 LWWindowPeer parentPeer = (LWWindowPeer) parentWindow.getPeer();
908 if (parentPeer == null) {
909 LWKeyboardFocusManagerPeer.removeLastFocusRequest(getTarget());
910 return false;
911 }
912
913 boolean res = parentPeer.requestWindowFocus(cause);
914 // If parent window can be made focused and has been made focused (synchronously)
915 // then we can proceed with children, otherwise we retreat
916 if (!res || !parentWindow.isFocused()) {
917 LWKeyboardFocusManagerPeer.removeLastFocusRequest(getTarget());
918 return false;
919 }
920
921 LWComponentPeer focusOwnerPeer =
922 LWKeyboardFocusManagerPeer.getInstance(getAppContext()).
923 getFocusOwner();
924 Component focusOwner = (focusOwnerPeer != null) ? focusOwnerPeer.getTarget() : null;
925 return LWKeyboardFocusManagerPeer.deliverFocus(lightweightChild,
926 getTarget(), temporary,
927 focusedWindowChangeAllowed,
928 time, cause, focusOwner);
929 case LWKeyboardFocusManagerPeer.SNFH_SUCCESS_HANDLED:
930 return true;
931 }
932
933 return false;
934 }
935
936 @Override
937 public Image createImage(ImageProducer producer) {
938 return new ToolkitImage(producer);
939 }
940
941 @Override
942 public Image createImage(int w, int h) {
943 // TODO: accelerated image
944 return getGraphicsConfiguration().createCompatibleImage(w, h);
945 }
946
947 @Override
948 public VolatileImage createVolatileImage(int w, int h) {
949 // TODO: is it a right/complete implementation?
950 return new SunVolatileImage(getTarget(), w, h);
951 }
952
953 @Override
954 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
955 // TODO: is it a right/complete implementation?
956 return getToolkit().prepareImage(img, w, h, o);
957 }
958
959 @Override
960 public int checkImage(Image img, int w, int h, ImageObserver o) {
961 // TODO: is it a right/complete implementation?
962 return getToolkit().checkImage(img, w, h, o);
963 }
964
965 @Override
966 public boolean handlesWheelScrolling() {
967 // TODO: not implemented
968 return false;
969 }
970
971 @Override
972 public final void applyShape(final Region shape) {
973 synchronized (getStateLock()) {
974 region = shape;
975 }
976 repaintParent(getBounds());
977 }
978
979 protected final Region getRegion() {
980 synchronized (getStateLock()) {
981 return region == null ? Region.getInstance(getSize()) : region;
982 }
983 }
984
985 // DropTargetPeer Method
986 @Override
987 public void addDropTarget(DropTarget dt) {
988 synchronized (dropTargetLock){
989 // 10-14-02 VL: Windows WComponentPeer would add (or remove) the drop target only
990 // if it's the first (or last) one for the component. Otherwise this call is a no-op.
991 if (++fNumDropTargets == 1) {
992 // Having a non-null drop target would be an error but let's check just in case:
993 if (fDropTarget != null)
994 System.err.println("CComponent.addDropTarget(): current drop target is non-null.");
995
996 // Create a new drop target:
997 fDropTarget = CDropTarget.createDropTarget(dt, target, this);
998 }
999 }
1000 }
1001
1002 // DropTargetPeer Method
1003 @Override
1004 public void removeDropTarget(DropTarget dt) {
1005 synchronized (dropTargetLock){
1006 // 10-14-02 VL: Windows WComponentPeer would add (or remove) the drop target only
1007 // if it's the first (or last) one for the component. Otherwise this call is a no-op.
1008 if (--fNumDropTargets == 0) {
1009 // Having a null drop target would be an error but let's check just in case:
1010 if (fDropTarget != null) {
1011 // Dispose of the drop target:
1012 fDropTarget.dispose();
1013 fDropTarget = null;
1014 } else
1015 System.err.println("CComponent.removeDropTarget(): current drop target is null.");
1016 }
1017 }
1018 }
1019
1020 // ---- PEER NOTIFICATIONS ---- //
1021
1022 /**
1023 * Called when this peer's location has been changed either as a result
1024 * of target.setLocation() or as a result of user actions (window is
1025 * dragged with mouse).
1026 *
1027 * To be overridden in LWWindowPeer to update its GraphicsConfig.
1028 *
1029 * This method could be called on the toolkit thread.
1030 */
1031 protected final void handleMove(final int x, final int y,
1032 final boolean updateTarget) {
1033 if (updateTarget) {
1034 AWTAccessor.getComponentAccessor().setLocation(getTarget(), x, y);
1035 }
1036 postEvent(new ComponentEvent(getTarget(),
1037 ComponentEvent.COMPONENT_MOVED));
1038 }
1039
1040 /**
1041 * Called when this peer's size has been changed either as a result of
1042 * target.setSize() or as a result of user actions (window is resized).
1043 *
1044 * To be overridden in LWWindowPeer to update its SurfaceData and
1045 * GraphicsConfig.
1046 *
1047 * This method could be called on the toolkit thread.
1048 */
1049 protected final void handleResize(final int w, final int h,
1050 final boolean updateTarget) {
1051 if (updateTarget) {
1052 AWTAccessor.getComponentAccessor().setSize(getTarget(), w, h);
1053 }
1054 postEvent(new ComponentEvent(getTarget(),
1055 ComponentEvent.COMPONENT_RESIZED));
1056 }
1057
1058 protected final void repaintOldNewBounds(final Rectangle oldB) {
1059 repaintParent(oldB);
1060 repaintPeer(getSize());
1061 }
1062
1063 protected final void repaintParent(final Rectangle oldB) {
1064 final LWContainerPeer cp = getContainerPeer();
1065 if (cp != null) {
1066 // Repaint unobscured part of the parent
1067 cp.repaintPeer(cp.getContentSize().intersection(oldB));
1068 }
1069 }
1070
1071 // ---- EVENTS ---- //
1072
1073 /**
1074 * Post an event to the proper Java EDT.
1075 */
1076 public void postEvent(AWTEvent event) {
1077 SunToolkit.postEvent(getAppContext(), event);
1078 }
1079
1080 protected void postPaintEvent(int x, int y, int w, int h) {
1081 // TODO: call getIgnoreRepaint() directly with the right ACC
1082 if (AWTAccessor.getComponentAccessor().getIgnoreRepaint(target)) {
1083 return;
1084 }
1085 PaintEvent event = PaintEventDispatcher.getPaintEventDispatcher().
1086 createPaintEvent(getTarget(), x, y, w, h);
1087 if (event != null) {
1088 postEvent(event);
1089 }
1090 }
1091
1092 /*
1093 * Gives a chance for the peer to handle the event after it's been
1094 * processed by the target.
1095 */
1096 @Override
1097 public void handleEvent(AWTEvent e) {
1098 if ((e instanceof InputEvent) && ((InputEvent) e).isConsumed()) {
1099 return;
1100 }
1101 switch (e.getID()) {
1102 case FocusEvent.FOCUS_GAINED:
1103 case FocusEvent.FOCUS_LOST:
1104 handleJavaFocusEvent((FocusEvent) e);
1105 break;
1106 case PaintEvent.PAINT:
1107 // Got a native paint event
1108 // paintPending = false;
1109 // fall through to the next statement
1110 case PaintEvent.UPDATE:
1111 handleJavaPaintEvent();
1112 break;
1113 case MouseEvent.MOUSE_PRESSED:
1114 handleJavaMouseEvent((MouseEvent)e);
1115 }
1116
1117 sendEventToDelegate(e);
1118 }
1119
1120 private void sendEventToDelegate(final AWTEvent e) {
1121 synchronized (getDelegateLock()) {
1122 if (getDelegate() == null || !isShowing() || !isEnabled()) {
1123 return;
1124 }
1125 AWTEvent delegateEvent = createDelegateEvent(e);
1126 if (delegateEvent != null) {
1127 AWTAccessor.getComponentAccessor()
1128 .processEvent((Component) delegateEvent.getSource(),
1129 delegateEvent);
1130 if (delegateEvent instanceof KeyEvent) {
1131 KeyEvent ke = (KeyEvent) delegateEvent;
1132 SwingUtilities.processKeyBindings(ke);
1133 }
1134 }
1135 }
1136 }
1137
1138 protected AWTEvent createDelegateEvent(AWTEvent e) {
1139 AWTEvent delegateEvent = null;
1140 if (e instanceof MouseWheelEvent) {
1141 MouseWheelEvent me = (MouseWheelEvent) e;
1142 delegateEvent = new MouseWheelEvent(
1143 delegate, me.getID(), me.getWhen(),
1144 me.getModifiers(),
1145 me.getX(), me.getY(),
1146 me.getClickCount(),
1147 me.isPopupTrigger(),
1148 me.getScrollType(),
1149 me.getScrollAmount(),
1150 me.getWheelRotation());
1151 } else if (e instanceof MouseEvent) {
1152 MouseEvent me = (MouseEvent) e;
1153
1154 Component eventTarget = SwingUtilities.getDeepestComponentAt(delegate, me.getX(), me.getY());
1155
1156 if (me.getID() == MouseEvent.MOUSE_DRAGGED) {
1157 if (delegateDropTarget == null) {
1158 delegateDropTarget = eventTarget;
1159 } else {
1160 eventTarget = delegateDropTarget;
1161 }
1162 }
1163 if (me.getID() == MouseEvent.MOUSE_RELEASED && delegateDropTarget != null) {
1164 eventTarget = delegateDropTarget;
1165 delegateDropTarget = null;
1166 }
1167 if (eventTarget == null) {
1168 eventTarget = delegate;
1169 }
1170 delegateEvent = SwingUtilities.convertMouseEvent(getTarget(), me, eventTarget);
1171 } else if (e instanceof KeyEvent) {
1172 KeyEvent ke = (KeyEvent) e;
1173 delegateEvent = new KeyEvent(getDelegateFocusOwner(), ke.getID(), ke.getWhen(),
1174 ke.getModifiers(), ke.getKeyCode(), ke.getKeyChar(), ke.getKeyLocation());
1175 } else if (e instanceof FocusEvent) {
1176 FocusEvent fe = (FocusEvent) e;
1177 delegateEvent = new FocusEvent(getDelegateFocusOwner(), fe.getID(), fe.isTemporary());
1178 }
1179 return delegateEvent;
1180 }
1181
1182 protected void handleJavaMouseEvent(MouseEvent e) {
1183 Component target = getTarget();
1184 assert (e.getSource() == target);
1185
1186 if (!target.isFocusOwner() && LWKeyboardFocusManagerPeer.shouldFocusOnClick(target)) {
1187 LWKeyboardFocusManagerPeer.requestFocusFor(target, CausedFocusEvent.Cause.MOUSE_EVENT);
1188 } else {
1189 // Anyway request focus to the toplevel.
1190 getWindowPeerOrSelf().requestWindowFocus(CausedFocusEvent.Cause.MOUSE_EVENT);
1191 }
1192 }
1193
1194 /**
1195 * Handler for FocusEvents.
1196 */
1197 protected void handleJavaFocusEvent(FocusEvent e) {
1198 // Note that the peer receives all the FocusEvents from
1199 // its lightweight children as well
1200 LWKeyboardFocusManagerPeer.getInstance(getAppContext()).
1201 setFocusOwner(e.getID() == FocusEvent.FOCUS_GAINED ? this : null);
1202 }
1203
1204 /**
1205 * All peers should clear background before paint.
1206 *
1207 * @return false on components that DO NOT require a clearRect() before
1208 * painting.
1209 */
1210 protected final boolean shouldClearRectBeforePaint() {
1211 // TODO: sun.awt.noerasebackground
1212 return true;
1213 }
1214
1215 /**
1216 * Handler for PAINT and UPDATE PaintEvents.
1217 */
1218 private void handleJavaPaintEvent() {
1219 // Skip all painting while layouting and all UPDATEs
1220 // while waiting for native paint
1221 // if (!isLayouting && !paintPending) {
1222 if (!isLayouting()) {
1223 targetPaintArea.paint(getTarget(), shouldClearRectBeforePaint());
1224 }
1225 }
1226
1227 // ---- UTILITY METHODS ---- //
1228
1229 /**
1230 * Finds a top-most visible component for the given point. The location is
1231 * specified relative to the peer's parent.
1232 */
1233 public LWComponentPeer findPeerAt(final int x, final int y) {
1234 final Rectangle r = getBounds();
1235 final Region sh = getRegion();
1236 final boolean found = isVisible() && sh.contains(x - r.x, y - r.y);
1237 return found ? this : null;
1238 }
1239
1240 /*
1241 * Translated the given point in Window coordinates to the point in
1242 * coordinates local to this component. The given window peer must be
1243 * the window where this component is in.
1244 */
1245 public Point windowToLocal(int x, int y, LWWindowPeer wp) {
1246 return windowToLocal(new Point(x, y), wp);
1247 }
1248
1249 public Point windowToLocal(Point p, LWWindowPeer wp) {
1250 LWComponentPeer cp = this;
1251 while (cp != wp) {
1252 Rectangle cpb = cp.getBounds();
1253 p.x -= cpb.x;
1254 p.y -= cpb.y;
1255 cp = cp.getContainerPeer();
1256 }
1257 // Return a copy to prevent subsequent modifications
1258 return new Point(p);
1259 }
1260
1261 public Rectangle windowToLocal(Rectangle r, LWWindowPeer wp) {
1262 Point p = windowToLocal(r.getLocation(), wp);
1263 return new Rectangle(p, r.getSize());
1264 }
1265
1266 public Point localToWindow(int x, int y) {
1267 return localToWindow(new Point(x, y));
1268 }
1269
1270 public Point localToWindow(Point p) {
1271 LWComponentPeer cp = getContainerPeer();
1272 Rectangle r = getBounds();
1273 while (cp != null) {
1274 p.x += r.x;
1275 p.y += r.y;
1276 r = cp.getBounds();
1277 cp = cp.getContainerPeer();
1278 }
1279 // Return a copy to prevent subsequent modifications
1280 return new Point(p);
1281 }
1282
1283 public Rectangle localToWindow(Rectangle r) {
1284 Point p = localToWindow(r.getLocation());
1285 return new Rectangle(p, r.getSize());
1286 }
1287
1288 public final void repaintPeer() {
1289 repaintPeer(getSize());
1290 }
1291
1292 public void repaintPeer(final Rectangle r) {
1293 final Rectangle toPaint = getSize().intersection(r);
1294 if (!isShowing() || toPaint.isEmpty()) {
1295 return;
1296 }
1297
1298 postPaintEvent(toPaint.x, toPaint.y, toPaint.width, toPaint.height);
1299 }
1300
1301 /**
1302 * Determines whether this peer is showing on screen. This means that the
1303 * peer must be visible, and it must be in a container that is visible and
1304 * showing.
1305 *
1306 * @see #isVisible()
1307 */
1308 protected boolean isShowing() {
1309 synchronized (getPeerTreeLock()) {
1310 if (isVisible()) {
1311 final LWContainerPeer container = getContainerPeer();
1312 return (container == null) || container.isShowing();
1313 }
1314 }
1315 return false;
1316 }
1317
1318 /**
1319 * Paints the peer. Overridden in subclasses to delegate the actual painting
1320 * to Swing components.
1321 */
1322 protected final void paintPeer(final Graphics g) {
1323 final D delegate = getDelegate();
1324 if (delegate != null) {
1325 if (!SwingUtilities.isEventDispatchThread()) {
1326 throw new InternalError("Painting must be done on EDT");
1327 }
1328 synchronized (getDelegateLock()) {
1329 // JComponent.print() is guaranteed to not affect the double buffer
1330 getDelegate().print(g);
1331 }
1332 }
1333 }
1334
1335 // Just a helper method, thus final
1336 protected final void flushOffscreenGraphics() {
1337 flushOffscreenGraphics(getSize());
1338 }
1339
1340 protected static final void flushOnscreenGraphics(){
1341 final OGLRenderQueue rq = OGLRenderQueue.getInstance();
1342 rq.lock();
1343 try {
1344 rq.flushNow();
1345 } finally {
1346 rq.unlock();
1347 }
1348 }
1349
1350 /*
1351 * Flushes the given rectangle from the back buffer to the screen.
1352 */
1353 protected void flushOffscreenGraphics(Rectangle r) {
1354 flushOffscreenGraphics(r.x, r.y, r.width, r.height);
1355 }
1356
1357 private void flushOffscreenGraphics(int x, int y, int width, int height) {
1358 Image bb = getWindowPeerOrSelf().getBackBuffer();
1359 if (bb != null) {
1360 // g is a screen Graphics from the delegate
1361 final Graphics g = getOnscreenGraphics();
1362
1363 if (g != null && g instanceof Graphics2D) {
1364 try {
1365 Graphics2D g2d = (Graphics2D)g;
1366 Point p = localToWindow(new Point(0, 0));
1367 Composite composite = g2d.getComposite();
1368 g2d.setComposite(AlphaComposite.Src);
1369 g.drawImage(bb, x, y, x + width, y + height, p.x + x,
1370 p.y + y, p.x + x + width, p.y + y + height,
1371 null);
1372 g2d.setComposite(composite);
1373 } finally {
1374 g.dispose();
1375 }
1376 }
1377 }
1378 }
1379
1380 /**
1381 * Used by ContainerPeer to skip all the paint events during layout.
1382 *
1383 * @param isLayouting layouting state.
1384 */
1385 protected final void setLayouting(final boolean isLayouting) {
1386 this.isLayouting = isLayouting;
1387 }
1388
1389 /**
1390 * Returns layouting state. Used by ComponentPeer to skip all the paint
1391 * events during layout.
1392 *
1393 * @return true during layout, false otherwise.
1394 */
1395 private final boolean isLayouting() {
1396 return isLayouting;
1397 }
1398 }