// ModelController.java adapted by Dr. I. for CS 102 during Spring, 2003
// Simple controller class for Model-View-Controller

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class ModelController extends JPanel {

   // Model to control
   private Model model;


   // JTextField for increment or decrement amount
   private JTextField amountTextField;

   // controller constructor
   public ModelController(Model controlledModel) {
      super();

      // Model to control
      model = controlledModel;

      // create JTextField for entering amount
      amountTextField = new JTextField(10);

      // create JButton for increment
      JButton incrementButton = new JButton("Increment");

      incrementButton.addActionListener(
         new ActionListener() {
            public void actionPerformed(ActionEvent event) {
               try {
                  // increment data value by amount entered in amountTextField
                  model.incrementValue(Integer.parseInt(amountTextField.getText()));
               } catch (NumberFormatException exception) {
                  JOptionPane.showMessageDialog(ModelController.this, "Please enter a valid integer", "Error", JOptionPane.ERROR_MESSAGE );
               }
            }
         }
      );

      // create JButton for decrement
      JButton decrementButton = new JButton( "Decrement" );

      decrementButton.addActionListener(
         new ActionListener() {
            public void actionPerformed( ActionEvent event ) {
               try {
                  // decrement data value by amount entered in amountTextField
                  model.decrementValue(Integer.parseInt(amountTextField.getText()));
               } catch (NumberFormatException exception) {
                  JOptionPane.showMessageDialog(ModelController.this, "Please enter a valid integer", "Error", JOptionPane.ERROR_MESSAGE );
               }
            }
         }
      );

      // lay out controller components
      setLayout( new FlowLayout() );
      add( decrementButton );
      add( new JLabel( "Amount: " ) );
      add( amountTextField );
      add( incrementButton );
   }
}