public void updateVisibility() {
invalidateChildren();
if (treeNodes != null) {
for (PageTreeNode child : treeNodes) {
child.updateVisibility();
}
}
if (isVisible()) {
if (!thresholdHit()) {
if (getBitmap() != null && !invalidateFlag) {
restoreBitmapReference();
} else {
decodePageTreeNode();
}
}
}
if (!isVisibleAndNotHiddenByChildren()) {
stopDecodingThisNode();
setBitmap(null);
}
}
public void invalidate() {
invalidateChildren();
invalidateRecursive();
updateVisibility();
}