Examples of javax.swing.tree.TreeCellRenderer

javax.swing.tree.TreeCellRenderer
oracle.com/javase/tutorial/uiswing/components/tree.html">How to Use Trees in The Java Tutorial for an example of implementing a tree cell renderer that displays custom icons. @author Rob Davis @author Ray Ryan @author Scott Violet

            boolean hasBeenExpanded;
            boolean isLeaf;
            Rectangle rowBounds = new Rectangle(0, 0, tree.getWidth(),0);
            Rectangle bounds;
            TreePath path;
            TreeCellRenderer renderer = tree.getCellRenderer();
            DefaultTreeCellRenderer dtcr = (renderer instanceof
                       DefaultTreeCellRenderer) ? (DefaultTreeCellRenderer)
                       renderer : null;


            configureRenderer(cellContext);

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        paintContext = null;
    }


    private void configureRenderer(SynthContext context) {
        TreeCellRenderer renderer = tree.getCellRenderer();


        if (renderer instanceof DefaultTreeCellRenderer) {
            DefaultTreeCellRenderer r = (DefaultTreeCellRenderer)renderer;
            SynthStyle style = context.getStyle();

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        return ENABLED | SELECTED;
    }


    @Override
    protected TreeCellEditor createDefaultCellEditor() {
        TreeCellRenderer renderer = tree.getCellRenderer();
        DefaultTreeCellEditor editor;


  if(renderer != null && (renderer instanceof DefaultTreeCellRenderer)) {
      editor = new SynthTreeCellEditor(tree, (DefaultTreeCellRenderer)
                                             renderer);

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      boolean isLeaf;
      Rectangle boundsBuffer = new Rectangle();
            Rectangle rowBounds = new Rectangle(0, 0, tree.getWidth(),0);
      Rectangle bounds;
      TreePath path;
            TreeCellRenderer renderer = tree.getCellRenderer();
            DefaultTreeCellRenderer dtcr = (renderer instanceof
                       DefaultTreeCellRenderer) ? (DefaultTreeCellRenderer)
                       renderer : null;


            configureRenderer(cellContext);

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        return rect;
    }


    private void configureRenderer(SynthContext context) {
        TreeCellRenderer renderer = tree.getCellRenderer();


        if (renderer instanceof DefaultTreeCellRenderer) {
            DefaultTreeCellRenderer r = (DefaultTreeCellRenderer)renderer;
            SynthStyle style = context.getStyle();

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        assertNull(tree.getCellEditor());
    }


    public void testSetCellRenderer() {
        PropertyChangeController listener = new PropertyChangeController();
        TreeCellRenderer renderer1 = new DefaultTreeCellRenderer();
        TreeCellRenderer renderer2 = new DefaultTreeCellRenderer();
        tree.addPropertyChangeListener(listener);
        TreeCellRenderer oldRenderer = tree.getCellRenderer();
        tree.setCellRenderer(renderer1);
        listener.checkPropertyFired(tree, "cellRenderer", oldRenderer, renderer1);
        assertEquals("cellRenderer", renderer1, tree.getCellRenderer());
        listener.reset();
        tree.setCellRenderer(renderer2);

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   * @param modelValue the value of a cell, retrieved from the model.
   * @return the internal value of a cell in a <code>JTree</code> as expected in a test.
   */
  @RunsInCurrentThread
  public String valueAt(JTree tree, Object modelValue) {
    TreeCellRenderer r = tree.getCellRenderer();
    Component c = r.getTreeCellRendererComponent(tree, modelValue, false, false, false, 0, false);
    String value = (c != null) ? rendererReader.valueFrom(c) : null;
    if (value != null) return value;
    value= tree.convertValueToText(modelValue, false, false, false, 0, false);
    if (isDefaultToString(value)) return null;
    return value;

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                } else {
                    tcr = table.getDefaultRenderer(table.getColumnClass(column));
                }
                children.add(tcr.getTableCellRendererComponent(table, value, selected, focused, row, column));
            } else if (tree != null) {
                TreeCellRenderer tcr;
                tcr = new DefaultTreeCellRenderer();
                children.add(tcr.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, focused));
            } else if (list != null) {
                ListCellRenderer lcr = (ListCellRenderer) UIManager.get("List.cellRenderer");
                if (lcr == null) {
                    lcr = new DefaultListCellRenderer();
                }

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              e.getY());
        }
      }
    });


    final TreeCellRenderer defaultRenderer = tree.getCellRenderer();
    if (defaultRenderer instanceof DefaultTreeCellRenderer) {
      //            ((DefaultTreeCellRenderer) defaultRenderer).setLeafIcon(null);
      tree.setRowHeight(16);
    }

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        @Override
        public void updateUI() {
            super.updateUI();
            // Make the tree's cell renderer use the table's cell selection
            // colors.
            TreeCellRenderer tcr = getCellRenderer();
            if (tcr instanceof DefaultTreeCellRenderer) {
                DefaultTreeCellRenderer dtcr = ((DefaultTreeCellRenderer) tcr);
                // For 1.1 uncomment this, 1.2 has a bug that will cause an
                // exception to be thrown if the border selection color is
                // null.

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