simparamstring.java

一个小型网络仿真器的实现

/*
   JaNetSim  ---  Java Network Simulator
   -------------------------------------

   This software was developed at the Network Research Lab, Faculty of
   Computer Science and Information Technology (FCSIT), University of Malaya.
   This software may be used and distributed freely. FCSIT assumes no responsibility
   whatsoever for its use by other parties, and makes no guarantees, expressed or
   implied, about its quality, reliability, or any other characteristic.

   We would appreciate acknowledgement if the software is used.

   FCSIT ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION AND
   DISCLAIM ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING
   FROM THE USE OF THIS SOFTWARE.
*/

package janetsim.component;

import janetsim.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class SimParamString extends SimParameter implements ActionListener,java.io.Serializable {
  private String value;
  private boolean isEditable;
  private transient JComponent jcomp=null;
  
  public SimParamString(String aName,SimComponent comp,long creationTick,boolean isLoggable,
                      boolean editable,String val) {
    super(aName,comp,creationTick,isLoggable);
    value=val;
    isEditable=editable;
  }

////////////// possible overrides //////////////////////////

  public String getValue() {
    return value;
  }

  public void setValue(String val) {
    value=val;
    if(jcomp!=null) scheduleUpdate();
  }

  //helper for thread safe GUI update
  private void scheduleUpdate() {
    Runnable r=new Runnable() {
      public void run() {
        if(isEditable) ((JButton)jcomp).setText(value);
        else  ((JLabel)jcomp).setText(value);
      }
    };
    SwingUtilities.invokeLater(r);
  }

  public boolean globalSetValue(String val) {
    if(!isEditable) return false;
    setValue(val);
    return true;
  }

  public String getString() {
    return value;
  }

  public JComponent getJComponent() {
    if(jcomp==null) {
      if(isEditable) {
        jcomp=new JButton(value);
        ((JButton)jcomp).setHorizontalAlignment(JButton.LEFT);
        ((JButton)jcomp).addActionListener(this);
      }
      else {
        jcomp=new JLabel(value);
        ((JLabel)jcomp).setBorder(BorderFactory.createCompoundBorder(
                BorderFactory.createLineBorder(Color.black),
                BorderFactory.createEmptyBorder(0,5,0,5)));
      }
    }
    return jcomp;
  }

  public void actionPerformed(ActionEvent e) {
    String newVal=JOptionPane.showInputDialog(theGUI.getMainFrame(),
      "New value:",getName(),JOptionPane.QUESTION_MESSAGE);
    if(newVal==null) return;
    
    if(!globalSetValue(newVal)) {
      JOptionPane.showMessageDialog(theGUI.getMainFrame(),"Not a valid value!","Error",
        JOptionPane.INFORMATION_MESSAGE);
    }
  }
}