BasicTreeUI.java 文件源码

/**
 * Sets the TreeCellRenderer to <code>tcr</code>. This invokes
 * <code>updateRenderer</code>.
 *
 * @param tcr is the new TreeCellRenderer.
 */
protected void setCellRenderer(TreeCellRenderer tcr)
{
  // Finish editing before changing the renderer.
  completeEditing();

  // The renderer is set in updateRenderer.
  updateRenderer();

  // Refresh the layout if necessary.
  if (treeState != null)
    {
      treeState.invalidateSizes();
      updateSize();
    }
}