clickpanel.java

这个是一个关于JMX的一个源代码

package dwjmxservice.basic;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class ClickPanelModel {
   int val = 0;
   ClickPanel myView;
   public ClickPanelModel(ClickPanel inView) {
     myView = inView;
     }
   public void setVal(int inVal) {
     val = inVal;
     myView.notifyUpdate();
     }
   public void incVal() {
    val = ++val;
    myView.notifyUpdate();
   }

   public void decVal() {
    val = --val;
    myView.notifyUpdate();
   }
   public int getVal () {
     return val;
  }
}

class ClickPanelController {
  private ClickPanel myPanel;
  public ClickPanelModel myModel;
  public ClickPanelController( ClickPanelModel inModel, ClickPanel inPanel) {
    myPanel = inPanel;
    myModel = inModel;
  }
  public void onIncButtonClicked() {
     myModel.incVal();
  }
  public void onDecButtonClicked() {
     myModel.decVal();
  }
}
public class ClickPanel extends JPanel {
  ClickPanelModel myModel = null;
  ClickPanelController myController = null;
  JLabel dispLabel = new JLabel();
  JPanel buttonsPanel = new JPanel();
  JButton incButton = new JButton();
  JButton decButton = new JButton();
  BorderLayout borderLayout = new BorderLayout();
  GridLayout gridLayout = new GridLayout();

  public ClickPanel() {
//      enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      guiInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }


  }
  public void initController() {
   myModel = new ClickPanelModel(this);
    myController = new ClickPanelController(myModel, this);
  }
   private void guiInit() throws Exception  {

    this.setLayout(borderLayout);
    this.setPreferredSize(new Dimension(100, 200));
    dispLabel.setBackground(Color.white);
    dispLabel.setFont(new java.awt.Font("Serif", 1, 89));
    dispLabel.setMaximumSize(new Dimension(500, 400));
    dispLabel.setOpaque(true);
    dispLabel.setToolTipText("Current Reading");
    dispLabel.setHorizontalAlignment(SwingConstants.CENTER);
    dispLabel.setText("0");
    buttonsPanel.setPreferredSize(new Dimension(50, 50));

    incButton.setFont(new java.awt.Font("SansSerif", 1, 22));
    incButton.setText("+");
    incButton.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        incButtonClicked(e);
      }
    });
    decButton.setFont(new java.awt.Font("SansSerif", 1, 22));
    decButton.setText("-");
    decButton.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        decButtonClicked(e);
      }
    });


     gridLayout.setColumns(1);
   gridLayout.setRows(2);
    gridLayout.setVgap(1);
    buttonsPanel.setLayout(gridLayout);
    this.add(dispLabel,  BorderLayout.CENTER);
    this.add(buttonsPanel, BorderLayout.EAST);
    buttonsPanel.add(incButton, null);
    buttonsPanel.add(decButton, null);
  }

 void incButtonClicked(ActionEvent e) {
   myController.onIncButtonClicked();
  }
 void decButtonClicked(ActionEvent e) {
   myController.onDecButtonClicked();
 }


public void notifyUpdate() {
   dispLabel.setText("" + myModel.getVal());
}
}