求助：关于拖拽JSplitPane的边界触发事件的问题

Question

baseGraphScrollPane和ratioGraphScrollPane是两个JScrollPane，设置其初始大小，如下：baseGraphScrollPane.setPreferredSize(new Dimension(
      this.BASE_GRAPH_PANEL_X, this.BASE_GRAPH_PANEL_Y));
ratioGraphScrollPane.setPreferredSize(new Dimension(
      this.BASE_GRAPH_PANEL_X, this.BASE_GRAPH_PANEL_Y));将baseGraphScrollPane和ratioGraphScrollPane放置到JSplitPane中，拖拽JSplitPane的边界改变两个JScrollPane的大小，请问在JSplitPane中触发什么事件来记录这一操作，我做这一操作主要是想通过getPreferredSize()得到baseGraphScrollPane和ratioGraphScrollPane的托拽后的大小值。另外，getPreferredSize()是否能得到拖拽后组件的大小final JSplitPane graphSplitPane = new JSplitPane(
                JSplitPane.VERTICAL_SPLIT, baseGraphScrollPane,
                ratioGraphScrollPane);
        graphSplitPane.setDividerLocation(this.BASE_DATA_PANEL_Y
                + this.BASE_GRAPH_PANEL_Y);
        graphSplitPane.setOneTouchExpandable(true);
        Component divider4 = getSplitDivider(graphSplitPane);
        divider4.addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent e) {
                if (e.getClickCount() == 2) {
                    if (ratioGraphScrollPane.isVisible()) {
                        graphSplitPane.setDividerLocation(1.0);
                    }
                }
            }
        });

Answer 1

top = new JScrollPane(new JTextArea());        JViewport vp = top.getViewport();        vp.addChangeListener(new ChangeListener(){
            public void stateChanged(ChangeEvent e) {
                JViewport evp = (JViewport)e.getSource();                System.out.println(evp.getViewPosition());
                System.out.println(evp.getViewSize());
                System.out.println(evp.getExtentSize());
                System.out.println();
            }
        });

Answer 2

应该是和JSplitPane有关的事件吧，你的没试，我已经找到了，谢谢楼上的 JSplitPane   sp   =   new   JSplitPane();   
  sp.addPropertyChangeListener(   
      new   PropertyChangeListener()   {   
          public   void   propertyChange(PropertyChangeEvent   e)   {   
              if   (e.getPropertyName().equals(JSplitPane.DIVIDER_LOCATION_PROPERTY))   {   
                  //do   your   bussiness   
              }   
          }   
      }   
  );

Answer 3

SplitPane.addComponentListener(new   java.awt.event.ComponentAdapter()   {   
              public   void   componentResized(ComponentEvent   e)   {   
                  ......   
                  //Your   Code   here   
              }   
          });试下。；）