706 Graphical User Interface Components: Part 1 Chapter (Christian web host)
706 Graphical User Interface Components: Part 1 Chapter 12 formed call the ElevatorModel s method placePersonOnFloor, which instantiates a Person object in the ElevatorModel on the specified Floor. Method placePersonOnFloor takes as an argument a String defined in interface ElevatorConstants(Fig. 12.31). This interface used by such classes as ElevatorController, ElevatorModel, Elevator, Floor and ElevatorView provides constants that specify the names of Locations in our simulation. 1 // ElevatorController.java 2 // Controller for Elevator Simulation 3 package com.deitel.jhtp4.elevator.controller; 4 5 // Java core packages 6 import java.awt.*; 7 import java.awt.event.*; 8 9 // Java extension packages 10 import javax.swing.*; 11 12 // Deitel packages 13 import com.deitel.jhtp4.elevator.model.*; 14 import com.deitel.jhtp4.elevator.event.*; 15 import com.deitel.jhtp4.elevator.ElevatorConstants; 16 17 public class ElevatorController extends JPanel 18 implements ElevatorConstants { 19 20 // controller contains two JButtons 21 private JButton firstControllerButton; 22 private JButton secondControllerButton; 23 24 // reference to model 25 private ElevatorModel elevatorModel; 26 27 public ElevatorController( ElevatorModel model ) 28 { 29 elevatorModel = model; 30 setBackground( Color.white ); 31 32 // add first button to controller 33 firstControllerButton = new JButton( “First Floor” ); 34 add( firstControllerButton ); 35 36 // add second button to controller 37 secondControllerButton = new JButton( “Second Floor” ); 38 add( secondControllerButton ); 39 40 // anonymous inner class registers to receive ActionEvents 41 // from first Controller JButton 42 firstControllerButton.addActionListener( 43 new ActionListener() { 44 Fig. 12.30 Class ElevatorControllerprocesses user input (part 1 of 3). Copyright 1992 2002 by Deitel & Associates, Inc. All Rights Reserved. 7/7/01