Examples of javax.swing.tree.ExpandVetoException

javax.swing.tree.ExpandVetoException
oracle.com/javase/tutorial/uiswing/events/treewillexpandlistener.html">How to Write a Tree-Will-Expand Listener in The Java Tutorial for further information and examples. @author Scott Violet

        assertTrue(tree.isExpanded(path1));
        assertTrue(tree.isExpanded(path11));
        assertFalse(tree.isExpanded(path111));
        tree.addTreeWillExpandListener(new TreeWillExpandListener() {
            public void treeWillExpand(TreeExpansionEvent event) throws ExpandVetoException {
                throw new ExpandVetoException(event);
            }


            public void treeWillCollapse(TreeExpansionEvent event) throws ExpandVetoException {
            }
        });
        tree.setExpandedState(path111, true);
        assertTrue(tree.isExpanded(path1));
        assertTrue(tree.isExpanded(path11));
        assertFalse(tree.isExpanded(path111));
        tree.addTreeWillExpandListener(new TreeWillExpandListener() {
            public void treeWillExpand(TreeExpansionEvent event) throws ExpandVetoException {
            }


            public void treeWillCollapse(TreeExpansionEvent event) throws ExpandVetoException {
                throw new ExpandVetoException(event);
            }
        });
        tree.setExpandedState(path11, false);
        assertTrue(tree.isExpanded(path1));
        assertTrue(tree.isExpanded(path11));

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    }
  }


  public void treeWillCollapse(TreeExpansionEvent e) throws ExpandVetoException {
    //Dont let the user collapse the tree
    throw new ExpandVetoException(e);
  }

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  @Override
  public void treeWillCollapse(TreeExpansionEvent arg0)
      throws ExpandVetoException {
    if(arg0.getPath().getLastPathComponent()==getModel().getRoot())
      throw new ExpandVetoException(arg0);
  }

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                new TreeWillExpandListener() {
                    public void treeWillExpand(javax.swing.event.TreeExpansionEvent event) throws javax.swing.tree.ExpandVetoException {
                        SwingTreePathProvider oSwingTreePathProvider = new SwingTreePathProvider(event.getPath());
                        XUnoNode oUnoNode = oSwingTreePathProvider.getLastPathComponent();
                        if (!m_oInspectorPane.expandNode(oUnoNode, oSwingTreePathProvider)){
                            throw new ExpandVetoException(event);
                        }
                    }


                    public void treeWillCollapse( javax.swing.event.TreeExpansionEvent evt) throws javax.swing.tree.ExpandVetoException {
                    }

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                }
            }
            canCollaps = canCollaps || isInnerPanelClear();
            if (!canCollaps) {
                MessageBox.showWarning(MessageBox.W_NOT_CLOSE_EDITING);
                throw new ExpandVetoException(event);
            }
        }

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