/** Stops the processing of the current tree. */
public void stopProcessing() {
if (gvtTreeRenderer != null) {
needRender = false;
gvtTreeRenderer.halt();
haltProgressivePaintThread();
}
}
/** Schedules a new GVT rendering. */
protected void scheduleGVTRendering() {
if (gvtTreeRenderer != null) {
needRender = true;
gvtTreeRenderer.halt();
} else {
renderGVTTree();
}
}
/** Renders the GVT tree. */
protected void renderGVTTree() {
Rectangle visRect = getRenderRect();
if (gvtRoot == null || visRect.width <= 0 || visRect.height <= 0) {
return;
}
// Renderer setup.
if (renderer == null || renderer.getTree() != gvtRoot) {
renderer = createImageRenderer();
renderer.setTree(gvtRoot);
}
// Area of interest computation.
AffineTransform inv;
try {
inv = renderingTransform.createInverse();
} catch (NoninvertibleTransformException e) {
throw new IllegalStateException("NoninvertibleTransformEx:" + e.getMessage());
}
Shape s = inv.createTransformedShape(visRect);
// Rendering thread setup.
gvtTreeRenderer =
new GVTTreeRenderer(
renderer,
renderingTransform,
doubleBufferedRendering,
s,
visRect.width,
visRect.height);
gvtTreeRenderer.setPriority(Thread.MIN_PRIORITY);
Iterator it = gvtTreeRendererListeners.iterator();
while (it.hasNext()) {
gvtTreeRenderer.addGVTTreeRendererListener((GVTTreeRendererListener) it.next());
}
// Disable the dispatch during the rendering
// to avoid concurrent access to the GVT tree.
if (eventDispatcher != null) {
eventDispatcher.setEventDispatchEnabled(false);
}
gvtTreeRenderer.start();
}
