// This program demonstrates opening multiple windows via JRadioButtons

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class SelectPopUp
{
	public static void main(String[] args)
	{
		JFrame f=new JFrame();
		f.setSize(200,200);
		f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		GuiPanel gp=new GuiPanel();
		f.add(gp);
		f.setVisible(true);
	}
	
	public static class GuiPanel extends JPanel implements ItemListener			// we will use ItemListener (we could use ActionListener)
	{
		private JRadioButton b1, b2, b3, b4, b5;							// our JRadioButtons control which popup window to open
		private JFrame f2, f3, f4, f5;										// 4 more JFrames which we will control by setting visible and invisible
		public GuiPanel()						
		{
			b1=new JRadioButton("Figure 1");			// create our imaginatively titled JRadioButtons
			b2=new JRadioButton("Figure 2");
			b3=new JRadioButton("Figure 3");
			b4=new JRadioButton("Figure 4");
			b5=new JRadioButton("Close");
			b1.addItemListener(this);					// this class will handle the ItemListener
			b2.addItemListener(this);
			b3.addItemListener(this);
			b4.addItemListener(this);
			b5.addItemListener(this);
			ButtonGroup bg=new ButtonGroup();			// group all 5 radio buttons into one group so only one can be selected
			bg.add(b1);
			bg.add(b2);
			bg.add(b3);
			bg.add(b4);
			bg.add(b5);
			add(b1);									// add the 5 buttons to this JPanel
			add(b2);
			add(b3);
			add(b4);
			add(b5);
			f2=new JFrame();							// each button will control a JFrame popping up, we create the JFrames here
			f2.setSize(400,400);
			f2.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
			Fig1 p2=new Fig1();							// we use 4 inner class JPanels, each of which presents a different Graphics image into its JFrame
			f2.add(p2);									// note that while we add the JPanel to the JFrame, we don't make the JFrame visible yet
			f3=new JFrame();
			f3.setSize(400,400);
			f3.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
			Fig2 p3=new Fig2();
			f3.add(p3);			
			f4=new JFrame();
			f4.setSize(400,400);
			f4.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
			Fig3 p4=new Fig3();
			f4.add(p4);			
			f5=new JFrame();
			f5.setSize(400,400);
			f5.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
			Fig4 p5=new Fig4();
			f5.add(p5);						
		}

		public void itemStateChanged(ItemEvent e)
		{
			if(b1.isSelected())
			{
				f2.setVisible(true);				// select button1?  Make frame2 (Fig1) visible
				// we could also do f3.setVisible(false);f4.setVisible(false);f5.setVisible(false); so that we 
			}	// hide any other visible JFrames
			else if(b2.isSelected())
			{
				Fig2 p3=new Fig2();
				f3.add(p3);
				f3.setVisible(true);
			}
			else if(b3.isSelected())
			{
				Fig3 p4=new Fig3();
				f4.add(p4);
				f4.setVisible(true);
			}
			else if(b4.isSelected())
			{
				Fig4 p5=new Fig4();
				f5.add(p5);
				f5.setVisible(true);
			}
			else if(b5.isSelected())
			{
				f2.setVisible(false);			// the close button causes all JFrames to be invisible (removes them)
				f3.setVisible(false);
				f4.setVisible(false);
				f5.setVisible(false);
			}
			
		}
			// now we define the JPanel classes for each of the 4 figures, all just have a paintComponent method
		public class Fig1 extends JPanel		
		{
			public void paintComponent(Graphics g)
			{
				g.fillRect(50,50,250,250);		// for simplicity, each only provides a minimal drawing
			}
		}
		
		public class Fig2 extends JPanel
		{
			public void paintComponent(Graphics g)
			{
				g.fillOval(50,50,250,250);
			}
		}
		
		public class Fig3 extends JPanel
		{
			public void paintComponent(Graphics g)
			{
				g.drawString("figure 3", 50,50);
			}
		}
		
		public class Fig4 extends JPanel
		{
			public void paintComponent(Graphics g)
			{
				g.drawLine(50,50,250,250);
				g.drawLine(50,250,250,50);
			}
		}						
	}
}