private static void drawSelection(JTree tree, Graphics g, final int width) {
   int y = 0;
   final int[] rows = tree.getSelectionRows();
   final int height = tree.getRowHeight();
   for (int row : rows) {
     final TreeCellRenderer renderer = tree.getCellRenderer();
     final Object value = tree.getPathForRow(row).getLastPathComponent();
     if (value == null) continue;
     final Component component =
         renderer.getTreeCellRendererComponent(tree, value, false, false, false, row, false);
     if (component.getFont() == null) {
       component.setFont(tree.getFont());
     }
     g.translate(0, y);
     component.setBounds(0, 0, width, height);
     boolean wasOpaque = false;
     if (component instanceof JComponent) {
       final JComponent j = (JComponent) component;
       if (j.isOpaque()) wasOpaque = true;
       j.setOpaque(false);
     }
     component.paint(g);
     if (wasOpaque) {
       ((JComponent) component).setOpaque(true);
     }
     y += height;
     g.translate(0, -y);
   }
 }
Ejemplo n.º 2
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 private static int getTreeBaseline(JTree tree, int height) {
   int rowHeight = tree.getRowHeight();
   if (TREE_LABEL == null) {
     TREE_LABEL = new JLabel("X");
     TREE_LABEL.setIcon(UIManager.getIcon("Tree.closedIcon"));
   }
   JLabel label = TREE_LABEL;
   label.setFont(tree.getFont());
   if (rowHeight <= 0) {
     rowHeight = label.getPreferredSize().height;
   }
   return getLabelBaseline(label, rowHeight) + tree.getInsets().top;
 }