/** Marks the path <code>path</code> expanded state to <code>isExpanded</code>. */
public void setExpandedState(TreePath path, boolean isExpanded) {
if (isExpanded) ensurePathIsExpanded(path, true);
else if (path != null) {
TreePath parentPath = path.getParentPath();
// YECK! Make the parent expanded.
if (parentPath != null) {
FHTreeStateNode parentNode = getNodeForPath(parentPath, false, true);
if (parentNode != null) parentNode.makeVisible();
}
// And collapse the child.
FHTreeStateNode childNode = getNodeForPath(path, true, false);
if (childNode != null) childNode.collapse(true);
}
}
/**
* Ensures that all the path components in path are expanded, accept for the last component which
* will only be expanded if expandLast is true. Returns true if succesful in finding the path.
*/
private boolean ensurePathIsExpanded(TreePath aPath, boolean expandLast) {
if (aPath != null) {
// Make sure the last entry isn't a leaf.
if (treeModel.isLeaf(aPath.getLastPathComponent())) {
aPath = aPath.getParentPath();
expandLast = true;
}
if (aPath != null) {
FHTreeStateNode lastNode = getNodeForPath(aPath, false, true);
if (lastNode != null) {
lastNode.makeVisible();
if (expandLast) lastNode.expand();
return true;
}
}
}
return false;
}
