package HandGUI;

import java.awt.*; // older GUI library, has layout stuff for components
import java.awt.event.*; // events
import javax.swing.*; // swing is a library of GUI components

// example of buttons with actionlisteners
// class extends JFrame, so it is its own window
public class Outer extends JFrame {

    // keep count of how many times each button was clicked
    private int times1;
    private int times2;
    private int times1or3;
    private JButton button1;
    private JButton button2;
    private JButton button3;

    // constructor does all setup of window and buttons
    public Outer() {
        // call the JFrame constructor
        super("I have a button");

        times1 = 0;
        times2 = 0;
        times1or3 = 0;

        // using methods inherited from JFrame
        // close the program if we close the window
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        // width, height in pixels 
        // usually better to use pack()
        // but if want to keep window at same size
        // make it big enough!
        //setSize(500, 100);
        // put new added widgets in from left to right
        setLayout(new FlowLayout());

        // button using an inner class as actionlistener
        button1 = new JButton("Button 1 - " + times1);
        button1.addActionListener(
                // the anonymous inner class to respond to clicks from button 1
                // since it it inner class, it can access method of outer class
                new ActionListener() { // implementing this interface
                    public void actionPerformed(ActionEvent e) {
                        update1();
                    }
                }
        );

        // button using an anonymous inner class as actionlistener
        button2 = new JButton("Button 2 - " + times2);
        button2.addActionListener(
            // the anonymous inner class to respond to clicks from button 2
            // since it it inner class, it can access times2 and button2
            new ActionListener() { 
                public void actionPerformed(ActionEvent e) {
                    times2++;
                    button2.setText("Button 2 - " + times2);
                    // might have made text on button longer
                    // then button won't fit anymore
                    // need to repack -- changes size of window
                    pack();
                }
            }
        );

        // button using inner class as actionlistener
        button3 = new JButton("Button 1 or 3 - " + times1or3);
        button3.addActionListener(new InnerActionListener1and3());
        
        // also use this actionlistener if button 1 is pushed
        // so button 1 has two actionlisteners triggered with every click
        button1.addActionListener(new InnerActionListener1and3());

        // put the buttons in the window
        add(button1);
        add(button2);
        add(button3);

        // size based on widgets
        // if flaky, use setsize instead
        // have to pack again if sizes change (e.g. 1->2 digit number)
        pack();
        // make the window visible
        setVisible(true);
    }

    // class to respond to clicks from button 1 or 3
    // Inner class has access to instance vars of outer class
    private class InnerActionListener1and3 implements ActionListener {

        public void actionPerformed(ActionEvent e) {
            times1or3++;
            button3.setText("Button 1 or 3 - " + times1or3);
            pack();
        }
    }

    // what we do to respond to clicks from button 1 or 3
    // method called in anonymous inner class ActionListener
    public void update1() {
        times1++;
        button1.setText("Button 1 - " + times1);
        pack();
    }

    // main to launch the GUI
    public static void main(String[] args) {
        // two separate windows, with their own variables
        // and own inner classes separate from each other
        Outer outerEx1 = new Outer();
        Outer outerEx2 = new Outer();
    }
}