446 applyConstrain(g);
447 }
448 }
449 return g;
450 }
451
452 /*
453 * Peer Graphics is borrowed from the parent peer, while
454 * foreground and background colors and font are specific to
455 * this peer.
456 */
457 public final Graphics getOnscreenGraphics() {
458 final LWWindowPeer wp = getWindowPeerOrSelf();
459 return wp.getOnscreenGraphics(getForeground(), getBackground(),
460 getFont());
461
462 }
463
464 private void applyConstrain(final Graphics g) {
465 final SunGraphics2D sg2d = (SunGraphics2D) g;
466 final Rectangle constr = localToWindow(getSize());
467 // translate and set rectangle constrain.
468 sg2d.constrain(constr.x, constr.y, constr.width, constr.height);
469 // set region constrain.
470 //sg2d.constrain(getVisibleRegion());
471 SG2DConstraint(sg2d, getVisibleRegion());
472 }
473
474 //TODO Move this method to SG2D?
475 void SG2DConstraint(final SunGraphics2D sg2d, Region r) {
476 sg2d.constrainX = sg2d.transX;
477 sg2d.constrainY = sg2d.transY;
478
479 Region c = sg2d.constrainClip;
480 if ((sg2d.constrainX | sg2d.constrainY) != 0) {
481 r = r.getTranslatedRegion(sg2d.constrainX, sg2d.constrainY);
482 }
483 if (c == null) {
484 c = r;
485 } else {
486 c = c.getIntersection(r);
487 if (c == sg2d.constrainClip) {
488 // Common case to ignore
489 return;
490 }
491 }
492 sg2d.constrainClip = c;
493 //validateCompClip() forced call.
494 sg2d.setDevClip(r.getLoX(), r.getLoY(), r.getWidth(), r.getHeight());
495 }
496
497 public Region getVisibleRegion() {
498 return computeVisibleRect(this, getRegion());
499 }
500
501 static final Region computeVisibleRect(LWComponentPeer c, Region region) {
502 final LWContainerPeer p = c.getContainerPeer();
503 if (p != null) {
504 final Rectangle r = c.getBounds();
505 region = region.getTranslatedRegion(r.x, r.y);
506 region = region.getIntersection(p.getRegion());
507 region = region.getIntersection(p.getContentSize());
508 region = p.cutChildren(region, c);
509 region = computeVisibleRect(p, region);
510 region = region.getTranslatedRegion(-r.x, -r.y);
511 }
512 return region;
513 }
514
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446 applyConstrain(g);
447 }
448 }
449 return g;
450 }
451
452 /*
453 * Peer Graphics is borrowed from the parent peer, while
454 * foreground and background colors and font are specific to
455 * this peer.
456 */
457 public final Graphics getOnscreenGraphics() {
458 final LWWindowPeer wp = getWindowPeerOrSelf();
459 return wp.getOnscreenGraphics(getForeground(), getBackground(),
460 getFont());
461
462 }
463
464 private void applyConstrain(final Graphics g) {
465 final SunGraphics2D sg2d = (SunGraphics2D) g;
466 final Rectangle size = localToWindow(getSize());
467 sg2d.constrain(size.x, size.y, size.width, size.height, getVisibleRegion());
468 }
469
470 public Region getVisibleRegion() {
471 return computeVisibleRect(this, getRegion());
472 }
473
474 static final Region computeVisibleRect(LWComponentPeer c, Region region) {
475 final LWContainerPeer p = c.getContainerPeer();
476 if (p != null) {
477 final Rectangle r = c.getBounds();
478 region = region.getTranslatedRegion(r.x, r.y);
479 region = region.getIntersection(p.getRegion());
480 region = region.getIntersection(p.getContentSize());
481 region = p.cutChildren(region, c);
482 region = computeVisibleRect(p, region);
483 region = region.getTranslatedRegion(-r.x, -r.y);
484 }
485 return region;
486 }
487
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