swing components－windows ScrollPane

swing components－windows ScrollPane

windows的scrollPane与table头持平，这个功能以前我一直都不直到怎么实现，最近茅舍顿开，时间不充裕，做的还不完善，有兴趣可以看一下。

效果：


代码：

package  azure.ui.swing.components.scrollPane;

import  java.awt.BorderLayout;
import  java.awt.Dimension;
import  java.awt.Rectangle;
import  java.awt.event.AdjustmentEvent;
import  java.awt.event.AdjustmentListener;
import  java.awt.event.MouseWheelEvent;
import  java.awt.event.MouseWheelListener;

import  javax.swing.JFrame;
import  javax.swing.JLabel;
import  javax.swing.JPanel;
import  javax.swing.JScrollBar;
import  javax.swing.JScrollPane;
import  javax.swing.JTable;
import  javax.swing.JViewport;
import  javax.swing.UIManager;
import  javax.swing.border.EmptyBorder;

/**
 *  @author  Azure
 *  @version  1.0 31/03/07
  */
public   class  AzWindowsScrollFrame  extends  JFrame  implements  AdjustmentListener {
    JScrollBar vScrollBar  =   new  JScrollBar();

    JScrollBar hScrollBar  =   new  JScrollBar();

    JTable table;

     public  AzWindowsScrollFrame() {
        init();
    }

     public   static   void  main(String[] args) {
         try  {
            UIManager
                    .setLookAndFeel( " com.sun.java.swing.plaf.windows.WindowsLookAndFeel " );
        }  catch  (Exception e) {
            System.err.println( " Something went wrong! " );
        }
        AzWindowsScrollFrame sf  =   new  AzWindowsScrollFrame();
        sf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        sf.setLocationRelativeTo( null );
        sf.setSize( new  Dimension( 300 ,  200 ));
        sf.setVisible( true );
    }

     private   void  init() {
         this .setLayout( new  BorderLayout());

        Object data[][]  =  { {  " one " ,  " 1 " ,  " swing "  }, {  " two " ,  " 2 " ,  " is "  },
                {  " three " ,  " 3 " ,  " very "  }, {  " four " ,  " 4 " ,  " nice "  },
                {  " five " ,  " 5 " ,  " swing "  }, {  " six " ,  " 6 " ,  " is "  },
                {  " seven " ,  " 7 " ,  " very "  }, {  " eight " ,  " 8 " ,  " nice "  },
                {  " nine " ,  " 9 " ,  " swing "  }, {  " ten " ,  " 10 " ,  " is "  } };
        Object headers[]  =  {  " col1 " ,  " col2 " ,  " col3 "  };
        table  =   new  JTable(data, headers);
        table.setPreferredSize( new  Dimension( 500 ,  300 ));

        JPanel panel  =   new  JPanel();
        panel.setLayout( new  BorderLayout());
        JScrollPane scrollPane  =   new  JScrollPane(table);
        scrollPane
                .setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_NEVER);
        scrollPane
                .setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
        scrollPane.setBorder( new  EmptyBorder( 0 ,  0 ,  0 ,  0 ));
        panel.setBorder( new  EmptyBorder( 0 ,  0 ,  0 ,  0 ));
        panel.add(scrollPane, BorderLayout.CENTER);

        JPanel hPanel  =   new  JPanel( new  BorderLayout());

        hScrollBar.setOrientation(JScrollBar.HORIZONTAL);
         int  visibleAmount  =   100 ;
        hScrollBar.setVisibleAmount(visibleAmount);
        hPanel.add(hScrollBar, BorderLayout.CENTER);

        JLabel vConerlabel  =   new  JLabel();
        vConerlabel.setMinimumSize( new  Dimension( 15 ,  10 ));
        vConerlabel.setPreferredSize( new  Dimension( 15 ,  10 ));
        vConerlabel.setBorder( new  EmptyBorder( 0 ,  0 ,  0 ,  0 ));
        hPanel.add(vConerlabel, BorderLayout.EAST);

        vScrollBar.addAdjustmentListener( this );
         int  hVisibleAmount  =   60 ;
        vScrollBar.setVisibleAmount(hVisibleAmount);
        vScrollBar.setUnitIncrement( 60 );
        vScrollBar.setValueIsAdjusting( true );

        vScrollBar.addMouseWheelListener( new  MouseWheelListener() {
             public   void  mouseWheelMoved(MouseWheelEvent e) {
                vScrollBar.setValue(vScrollBar.getValue()
                         +  e.getWheelRotation()  *   60 );
            }
        });
        hScrollBar.addAdjustmentListener( this );
        hScrollBar.addMouseWheelListener( new  MouseWheelListener() {
             public   void  mouseWheelMoved(MouseWheelEvent e) {
                hScrollBar.setValue(hScrollBar.getValue()
                         +  e.getWheelRotation()  *   60 );
            }
        });

         this .add(hPanel, BorderLayout.SOUTH);
         this .add(panel, BorderLayout.CENTER);
         this .add(vScrollBar, BorderLayout.EAST);
    }

     public   void  adjustmentValueChanged(AdjustmentEvent e) {
         if  (e.getSource()  ==  vScrollBar) {
            scrollToTableV(table, e.getValue());

        }  else   if  (e.getSource()  ==  hScrollBar) {
            scrollToTableH(table, e.getValue());
        }
    }

     public   void  scrollToTableH(JTable table,  int  value) {
         if  ( ! (table.getParent()  instanceof  JViewport)) {
             return ;
        }
        JViewport viewport  =  (JViewport) table.getParent();
        Rectangle viewRect  =  viewport.getViewRect();
        Rectangle rect  =   new  Rectangle(value  *  table.getWidth()  /   90 ,
                ( int ) viewRect.getY(),  10 ,  10 );

        rect.setLocation(rect.x  -  viewRect.x, rect.y  -  viewRect.y);
        viewport.scrollRectToVisible(rect);
    }

     public   void  scrollToTableV(JTable table,  int  value) {
         if  ( ! (table.getParent()  instanceof  JViewport)) {
             return ;
        }
        JViewport viewport  =  (JViewport) table.getParent();
        Rectangle viewRect  =  viewport.getViewRect();
        Rectangle rect  =   new  Rectangle(( int ) viewRect.getX(), value
                 *  table.getHeight()  /   90 ,  10 ,  10 );

        rect.setLocation(rect.x  -  viewRect.x, rect.y  -  viewRect.y);
        viewport.scrollRectToVisible(rect);
    }

}