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Fix #74 Add TreeExpansionListener to expand descendant tree nodes with only one member.

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This commit is contained in:
Frederik Boster 2017-04-07 17:44:39 +02:00
parent e9e84e0cbb
commit 3fc710524e
1 changed files with 32 additions and 0 deletions
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32
src/us/deathmarine/luyten/Model.java
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@ -40,6 +40,8 @@ import javax.swing.JTree;
import javax.swing.SwingUtilities;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.event.TreeExpansionEvent;
import javax.swing.event.TreeExpansionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeNode;
@ -117,6 +119,7 @@ public class Model extends JSplitPane {
tree.setCellRenderer(new CellRenderer());
TreeListener tl = new TreeListener();
tree.addMouseListener(tl);
tree.addTreeExpansionListener(new FurtherExpandingTreeExpansionListener());
tree.addKeyListener(new KeyAdapter() {
@Override
@ -246,6 +249,35 @@ public class Model extends JSplitPane {
}
}
private class FurtherExpandingTreeExpansionListener implements TreeExpansionListener {
@Override
public void treeExpanded(final TreeExpansionEvent event) {
final TreePath treePath = event.getPath();
final Object expandedTreePathObject = treePath.getLastPathComponent();
if (!(expandedTreePathObject instanceof TreeNode)) {
return;
}
final TreeNode expandedTreeNode = (TreeNode) expandedTreePathObject;
if (expandedTreeNode.getChildCount() == 1) {
final TreeNode descendantTreeNode = expandedTreeNode.getChildAt(0);
if (descendantTreeNode.isLeaf()) {
return;
}
final TreePath nextTreePath = treePath.pathByAddingChild(descendantTreeNode);
tree.expandPath(nextTreePath);
}
}
@Override
public void treeCollapsed(final TreeExpansionEvent event) {
}
}
public void openEntryByTreePath(TreePath trp) {
String name = "";
String path = "";