public void dispose() {
   final KeyStroke[] treeStrokes = getRegisteredKeyStrokes();
   for (KeyStroke stroke : treeStrokes) {
     unregisterKeyboardAction(stroke);
   }
   myBreakpointManager.removeBreakpointManagerListener(myNodeUpdateListener);
 }
  @Override
  protected void onNodeStateChanged(final CheckedTreeNode node) {
    final Object descriptor = node.getUserObject();
    final Breakpoint breakpoint;
    if (descriptor instanceof BreakpointDescriptor) {
      breakpoint = ((BreakpointDescriptor) descriptor).getBreakpoint();
      if (myBreakpointManager.findMasterBreakpoint(breakpoint) != null) {
        return;
      }
    } else {
      breakpoint = null;
    }

    if (breakpoint != null) {
      myBreakpointManager.setBreakpointEnabled(breakpoint, node.isChecked());
    }
  }
 public BreakpointTree(final Project project) {
   super(new BreakpointTreeCellRenderer(), new CheckedTreeNode(new RootDescriptor()));
   myRootNode = (CheckedTreeNode) getModel().getRoot();
   myDescriptorToNodeMap.put((TreeDescriptor) myRootNode.getUserObject(), myRootNode);
   myBreakpointManager = DebuggerManagerEx.getInstanceEx(project).getBreakpointManager();
   myNodeUpdateListener =
       new BreakpointManagerListener() {
         public void breakpointsChanged() {
           repaint();
         }
       };
   myBreakpointManager.addBreakpointManagerListener(myNodeUpdateListener);
   getEmptyText().setText(XDebuggerBundle.message("debugger.no.breakpoints"));
 }