/*
* Copyright 2000-2006 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jetbrains.communicator.util;
import javax.swing.*;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreePath;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* @author Kir Maximov
*/
@SuppressWarnings({"unchecked"})
public class TreeState {
private final Set mySelectedNodes = new HashSet();
private final Set myExpandedNodes = new HashSet();
@SuppressWarnings("UnusedDeclaration")
public TreeState() {
}
public TreeState(JTree tree) {
saveTreeSelection(tree);
saveExpandedNodes(tree);
}
private void saveExpandedNodes(JTree tree) {
int rowCount = tree.getRowCount();
for (int i = 0; i < rowCount; i++) {
TreePath path = tree.getPathForRow(i);
if (tree.isExpanded(path)) {
myExpandedNodes.add(getObject(path));
}
}
}
private void saveTreeSelection(JTree tree) {
TreePath[] selectionPaths = tree.getSelectionPaths();
if (selectionPaths != null) {
for (TreePath path : selectionPaths) {
mySelectedNodes.add(getObject(path));
}
}
}
public void restore(JTree tree) {
restoreExpandedNodes(tree);
restoreSelection(tree);
}
private void restoreExpandedNodes(JTree tree) {
for (Object o : myExpandedNodes) {
DefaultMutableTreeNode node = TreeUtils.findNodeWithObject((DefaultMutableTreeNode) tree.getModel().getRoot(), o);
if (node != null) {
tree.expandPath(TreeUtils.getPathFromRoot(node));
}
}
}
private void restoreSelection(JTree tree) {
List<TreePath> selectedPaths = new ArrayList<>();
for (Object o : mySelectedNodes) {
DefaultMutableTreeNode node = TreeUtils.findNodeWithObject((DefaultMutableTreeNode) tree.getModel().getRoot(), o);
if (node != null) {
selectedPaths.add(TreeUtils.getPathFromRoot(node));
}
}
tree.setSelectionPaths(selectedPaths.toArray(new TreePath[selectedPaths.size()]));
}
private Object getObject(TreePath path) {
return ((DefaultMutableTreeNode) path.getLastPathComponent()).getUserObject();
}
public void addReplacement(Object oldValue, Object newValue) {
if (myExpandedNodes.contains(oldValue)) {
myExpandedNodes.add(newValue);
}
if (mySelectedNodes.contains(oldValue)) {
mySelectedNodes.add(newValue);
}
}
}