Examples of javax.swing.tree.VariableHeightLayoutCache$TreeStateNode

javax.swing.tree.VariableHeightLayoutCache
TreeStateNode is used to keep track of each of the nodes that have been expanded. This will also cache the preferred size of the value it represents.

        assertEquals(4, ui.treeState.getRowCount());
        assertEquals(4, ui.getRowCount(new JTree()));
        TreePath p = new TreePath(new Object[] { root, node2 });
        tree.expandPath(p);
        assertEquals(6, ui.getRowCount(tree));
        ui.treeState = new VariableHeightLayoutCache() {
            @Override
            public int getRowCount() {
                return -200;
            }
        };

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        assertTrue(tree.isRootVisible());
        TreePath p = new TreePath(new Object[] { root, node2 });
        assertEquals(2, ui.getRowForPath(tree, p));
        assertEquals(2, ui.getRowForPath(new JTree(), p));
        tree.expandPath(new TreePath(new Object[] { root, node1 }));
        ui.treeState = new VariableHeightLayoutCache() {
            @Override
            public int getRowForPath(final TreePath p) {
                return -200;
            }
        };

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    public void testUpdateExpandedDescendants() {
        TreePath pathToExpand = new TreePath(tree.getModel().getRoot())
                .pathByAddingChild(node1);
        tree.expandPath(pathToExpand);
        assertTrue(ui.treeState.isExpanded(pathToExpand));
        ui.treeState = new VariableHeightLayoutCache();
        ui.treeState.setModel(tree.getModel());
        assertFalse(ui.treeState.isExpanded(pathToExpand));
        ui.updateExpandedDescendants(new TreePath(tree.getModel().getRoot()));
        assertTrue(ui.treeState.isExpanded(pathToExpand));
    }

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    public void testConfigureLayoutCache() {
        TreePath expandedPath = new TreePath(tree.getModel().getRoot())
                .pathByAddingChild(node1);
        tree.expandPath(expandedPath);
        ui.treeState = new VariableHeightLayoutCache();
        ui.configureLayoutCache();
        assertSame(tree.getModel(), ui.treeState.getModel());
        assertSame(tree.getSelectionModel(), ui.treeState.getSelectionModel());
        assertSame(ui.nodeDimensions, ui.treeState.getNodeDimensions());
        assertEquals(tree.getRowHeight(), ui.treeState.getRowHeight());

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   *
   * @return the object responsible for managing what is expanded.
   */
  protected AbstractLayoutCache createLayoutCache()
  {
    return new VariableHeightLayoutCache();
  }

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