elevatorcontroller.java

这是一个电梯模拟运行的程序

// ElevatorController.java
// Controller for Elevator Simulation
package com.deitel.jhtp5.elevator.controller;

// Java core packages
import java.awt.*;
import java.awt.event.*;

// Java extension packages
import javax.swing.*;

// Deitel packages
import com.deitel.jhtp5.elevator.model.*;
import com.deitel.jhtp5.elevator.event.*;
import com.deitel.jhtp5.elevator.ElevatorConstants;

public class ElevatorController extends JPanel
   implements ElevatorConstants {

   // controller contains two JButtons
   private JButton firstControllerButton;
   private JButton secondControllerButton;

   // reference to model
   private ElevatorSimulation elevatorSimulation;

   public ElevatorController( ElevatorSimulation simulation )
   {
      elevatorSimulation = simulation;
      setBackground( Color.white );

      // add first button to controller
      firstControllerButton = new JButton( "First Floor" );
      add( firstControllerButton );

      // add second button to controller
      secondControllerButton = new JButton( "Second Floor" );
      add( secondControllerButton );

      // anonymous inner class registers for ActionEvents from
      // first Controller JButton
      firstControllerButton.addActionListener( 
         new ActionListener() {

            // invoked when a JButton has been pressed
            public void actionPerformed( ActionEvent event )
            {
               // add Person to first Floor
               elevatorSimulation.addPerson( FIRST_FLOOR_NAME );

               // disable user input
               firstControllerButton.setEnabled( false );
            }
         } // end anonymous inner class
      );

      // anonymous inner class registers for ActionEvents from
      // second Controller JButton
      secondControllerButton.addActionListener( 
         new ActionListener() {

            // invoked when a JButton has been pressed
            public void actionPerformed( ActionEvent event )
            {
               // add Person to second Floor
               elevatorSimulation.addPerson( SECOND_FLOOR_NAME );

               // disable user input
               secondControllerButton.setEnabled( false );
            }
         } // end anonymous inner class
      );

      // anonymous inner class enables user input on Floor if
      // Person enters Elevator on that Floor
      elevatorSimulation.addPersonMoveListener( 
         new PersonMoveListener() {

            // invoked when Person has entered Elevator
            public void personEntered( 
               PersonMoveEvent event )
            {
               // get Floor of departure 
               String location =
                  event.getLocation().getLocationName();

               // enable first JButton if first Floor departure
               if ( location.equals( FIRST_FLOOR_NAME ) )
                  firstControllerButton.setEnabled( true );

               // enable second JButton if second Floor
               else
                  secondControllerButton.setEnabled( true );

            } // end method personEntered

            // other methods implementing PersonMoveListener
            public void personCreated( 
               PersonMoveEvent event ) {}

            public void personArrived( 
               PersonMoveEvent event ) {}

            public void personExited( 
               PersonMoveEvent event ) {}

            public void personDeparted( 
               PersonMoveEvent event ) {}

            public void personPressedButton( 
               PersonMoveEvent event ) {}

         } // end anonymous inner class
      );
   } // end ElevatorController constructor
}


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