public static List<TreePath> collectExpandedPaths(final JTree tree, TreePath path) {
final ArrayList<TreePath> result = new ArrayList<TreePath>();
if (!tree.isExpanded(path)) return result;
final Object lastPathComponent = path.getLastPathComponent();
final TreeModel model = tree.getModel();
if (model.isLeaf(lastPathComponent)) {
result.add(path);
} else {
boolean pathWasAdded = false;
for (int i = model.getChildCount(lastPathComponent) - 1; i >= 0; i--) {
final TreePath childPath = path.pathByAddingChild(model.getChild(lastPathComponent, i));
if (model.isLeaf(lastPathComponent)) {
if (!pathWasAdded) {
result.add(path);
pathWasAdded = true;
}
} else if (tree.isExpanded(childPath)) {
result.addAll(collectExpandedPaths(tree, childPath));
} else {
if (!pathWasAdded) {
result.add(path);
pathWasAdded = true;
}
}
}
}
return result;
}
private static void printImpl(
JTree tree,
Object root,
Collection<String> strings,
int level,
boolean withSelection,
@Nullable Condition<String> nodePrintCondition) {
DefaultMutableTreeNode defaultMutableTreeNode = (DefaultMutableTreeNode) root;
final Object userObject = defaultMutableTreeNode.getUserObject();
String nodeText;
if (userObject != null) {
nodeText = toString(userObject, null);
} else {
nodeText = "null";
}
if (nodePrintCondition != null && !nodePrintCondition.value(nodeText)) return;
final StringBuilder buff = new StringBuilder();
StringUtil.repeatSymbol(buff, ' ', level);
final boolean expanded = tree.isExpanded(new TreePath(defaultMutableTreeNode.getPath()));
if (!defaultMutableTreeNode.isLeaf()) {
buff.append(expanded ? "-" : "+");
}
final boolean selected =
tree.getSelectionModel().isPathSelected(new TreePath(defaultMutableTreeNode.getPath()));
if (withSelection && selected) {
buff.append("[");
}
buff.append(nodeText);
if (withSelection && selected) {
buff.append("]");
}
strings.add(buff.toString());
int childCount = tree.getModel().getChildCount(root);
if (expanded) {
for (int i = 0; i < childCount; i++) {
printImpl(
tree,
tree.getModel().getChild(root, i),
strings,
level + 1,
withSelection,
nodePrintCondition);
}
}
}
private void captureUsagesExpandState(TreePath pathFrom, final Collection<UsageState> states) {
if (!myTree.isExpanded(pathFrom)) {
return;
}
final DefaultMutableTreeNode node = (DefaultMutableTreeNode) pathFrom.getLastPathComponent();
final int childCount = node.getChildCount();
for (int idx = 0; idx < childCount; idx++) {
final TreeNode child = node.getChildAt(idx);
if (child instanceof UsageNode) {
final Usage usage = ((UsageNode) child).getUsage();
states.add(
new UsageState(
usage,
myTree.getSelectionModel().isPathSelected(pathFrom.pathByAddingChild(child))));
} else {
captureUsagesExpandState(pathFrom.pathByAddingChild(child), states);
}
}
}