// This is the View

// Its only job is to display what the user sees

// It performs no calculations, but instead passes

// information entered by the user to whomever needs

// it.

import java.awt.event.ActionListener;

import javax.swing.*;

public class CalculatorView extends JFrame{

private JTextField firstNumber = new JTextField(10);

private JLabel additionLabel = new JLabel("+");

private JTextField secondNumber = new JTextField(10);

private JButton calculateButton = new JButton("Calculate");

private JTextField calcSolution = new JTextField(10);

CalculatorView(){

// Sets up the view and adds the components

JPanel calcPanel = new JPanel();

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.setSize(600, 200);

calcPanel.add(firstNumber);

calcPanel.add(additionLabel);

calcPanel.add(secondNumber);

calcPanel.add(calculateButton);

calcPanel.add(calcSolution);

this.add(calcPanel);

// End of setting up the components --------

}

public int getFirstNumber(){

return Integer.parseInt(firstNumber.getText());

}

public int getSecondNumber(){

return Integer.parseInt(secondNumber.getText());

}

public int getCalcSolution(){

return Integer.parseInt(calcSolution.getText());

}

public void setCalcSolution(int solution){

calcSolution.setText(Integer.toString(solution));

}

// If the calculateButton is clicked execute a method

// in the Controller named actionPerformed

void addCalculateListener(ActionListener listenForCalcButton){

calculateButton.addActionListener(listenForCalcButton);

}

// Open a popup that contains the error message passed

void displayErrorMessage(String errorMessage){

JOptionPane.showMessageDialog(this, errorMessage);

}

}