BasicToolBarUI.java 文件源码

/**
 * This method is responsible for setting rollover or non rollover for new
 * buttons added to the JToolBar.
 *
 * @param e The ContainerEvent.
 */
public void componentAdded(ContainerEvent e)
{
  if (e.getChild() instanceof JButton)
    {
      JButton b = (JButton) e.getChild();

      if (b.getBorder() != null)
        borders.put(b, b.getBorder());
    }

  if (isRolloverBorders())
    setBorderToRollover(e.getChild());
  else
    setBorderToNonRollover(e.getChild());

  cachedBounds = toolBar.getPreferredSize();
  cachedOrientation = toolBar.getOrientation();

  Component c = e.getChild();
  if (toolBarFocusListener != null)
    c.addFocusListener(toolBarFocusListener);
}