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();
     }
 }