/**
FrameApplication: 

Sample application discussed in class to demonstrate:

AWT Containers
Events
Event Sources
Event Listeners
Graphics

To run this sample, save this file as FrameApplication.java,
compile with the "javac" compiler and run with the "java" jre.

*/
import java.awt.*;
import java.awt.event.*;
import java.util.*;

public class FrameApplication extends Frame implements ActionListener
{
	private Button circle, rectangle, text, clear;
	private HashSet images = new HashSet();


	/**
	Create main application window.
	*/
	public FrameApplication() 
	{
		setLayout( new FlowLayout( ) );

		addWindowListener( new ExitWindowAdapter() );
		circle = new Button("Circle");
		rectangle = new Button("Rectangle");
		text = new Button("Text");
		clear = new Button("Clear");

		add( circle );
		add( rectangle );
		add( text );
		add( clear );
		
		circle.addActionListener( this );
		rectangle.addActionListener( this );
		text.addActionListener( this );
		clear.addActionListener( this );
	}

	/**
	Iterate through all added images, determine the
	type of image, and draw accordingly.
	*/
  	public void paint(Graphics g) 
	{
		Iterator i = images.iterator();
		
		while ( i.hasNext() )
		{
			Object o = i.next();
			if ( o instanceof Circle )
			{
				g.setColor( Color.green );
				Circle c = (Circle) o;
				g.drawOval( c.getX(), c.getY(), c.getW(), c.getH() );
			}
			else if ( o instanceof Rectangle )
			{
				g.setColor( Color.blue );
				Rectangle r = (Rectangle) o;
				g.drawRect( r.getX(), r.getY(), r.getW(), r.getH() );
			}
			else if ( o instanceof Text )
			{
				g.setColor( Color.red );
				Text t = (Text) o;
				Font f = new Font("SansSerif", Font.BOLD, t.getS());
				g.setFont( f );
				g.drawString( t.getV(), t.getX(), t.getY() );
			}
		}
  	}

	/**
	Called when any of the top buttons are clicked.
	*/
	public void actionPerformed( ActionEvent ae )
	{
		Object o = ae.getSource();
		Frame popup = null;
		String component = null;

		if ( o == clear )
		{
			//clears all images from hashset
			images = new HashSet();				
		}
		else
		{
			//determine which type of window to create based on
			//what button was clicked
			if ( o == circle ) popup= new CircleChoices( this );
			if ( o == rectangle ) popup = new RectangleChoices( this );
			if ( o == text ) popup = new TextChoices( this );
			popup.setSize(500, 100 );
			popup.setLocation( 250, 250 );
			popup.setVisible( true );
		}
	
					
		repaint();
	}

	/**
	Accept a new window from popup window, add it to
	HashSet, and repaint().
	*/
	public void addImage( Object img )
	{
		images.add( img );
		repaint();
	}
	

	/**
	Starts main application window.
	*/
	public static void main( String args[] )
	{
		FrameApplication fm = new FrameApplication();
		fm.setSize(500, 500 );
		fm.setTitle("Frame Application Sample");
		fm.setVisible( true );		
	}	
}

/**
Adapter that closes main application window.
*/
class ExitWindowAdapter extends WindowAdapter
{
	// Exits when main window is closed.
	public void windowClosing( WindowEvent we )
	{
		System.exit( 0 );
	}
}

/**
Adapter that closes popup configuration windows.
*/
class PopupWindowAdapter extends WindowAdapter
{
	// Called when any of the submit buttons for
	// configuration windows are pressed.
	public void windowClosing( WindowEvent we )
	{
		Frame f = (Frame)we.getSource();
		f.setVisible( false );
		
	}
}

/**
Class that draws and processes the Circle Configuration
window.
*/
class CircleChoices extends Frame implements ActionListener
{
	Button submitButton;
	FrameApplication parent;
	Label lx, ly, lw, lh;
	TextField tx, ty, tw, th;


	public CircleChoices( FrameApplication p ) 
	{
		setTitle("Circle Configuration");

		setLayout( new FlowLayout( ) );
		parent = p;
		addWindowListener( new PopupWindowAdapter() );
		
		submitButton = new Button("Submit");
		tx = new TextField(3);
		ty = new TextField(3);
		tw = new TextField(3);
		th = new TextField(3);

		add( new Label("X:") );
		add( tx );
		add( new Label("y:") );
		add( ty );
		add( new Label("w:") );
		add( tw );
		add( new Label("h:") );
		add( th );
		add( submitButton );
		
		submitButton.addActionListener( this );		
	}


	// called when Submit is selected from Circle Configuration
	public void actionPerformed( ActionEvent ae )
	{
		int x=250, y=250, w=50, h=50;
		try
		{
			x = Integer.parseInt( tx.getText() );
			y = Integer.parseInt( ty.getText() );
			w = Integer.parseInt( tw.getText() );
			h = Integer.parseInt( th.getText() );
		}
		catch ( Exception e ){}

		Circle c = new Circle ( x, y, w, h );
		parent.addImage( c );
		setVisible( false );
	}
}

/**
Class that draws and processes the Rectangle Configuration
window.
*/
class RectangleChoices extends Frame implements ActionListener
{
	Button submitButton;
	FrameApplication parent;
	Label lx, ly, lw, lh;
	TextField tx, ty, tw, th;


	public RectangleChoices( FrameApplication p ) 
	{
		setTitle("Rectangle Configuration");

		setLayout( new FlowLayout( ) );
		parent = p;
		addWindowListener( new PopupWindowAdapter() );
		
		submitButton = new Button("Submit");
		tx = new TextField(3);
		ty = new TextField(3);
		tw = new TextField(3);
		th = new TextField(3);

		add( new Label("X:") );
		add( tx );
		add( new Label("y:") );
		add( ty );
		add( new Label("w:") );
		add( tw );
		add( new Label("h:") );
		add( th );
		add( submitButton );
		
		submitButton.addActionListener( this );		
	}


	// called when Submit is selected from Rectangle Configuration
	public void actionPerformed( ActionEvent ae )
	{
		int x=250, y=250, w=50, h=50;
		try
		{
			x = Integer.parseInt( tx.getText() );
			y = Integer.parseInt( ty.getText() );
			w = Integer.parseInt( tw.getText() );
			h = Integer.parseInt( th.getText() );
		}
		catch ( Exception e ){}

		Rectangle r = new Rectangle ( x, y, w, h );
		parent.addImage( r );
		setVisible( false );
	}
}

/**
Class that draws and processes the Text Configuration
window.
*/
class TextChoices extends Frame implements ActionListener
{
	Button submitButton;
	FrameApplication parent;
	Label lx, ly, ls, lv;
	TextField tx, ty, ts, tv;

	// creates popup accepting text configuration
	public TextChoices( FrameApplication p ) 
	{
		setTitle("Text Configuration");

		setLayout( new FlowLayout( ) );
		parent = p;
		addWindowListener( new PopupWindowAdapter() );
		
		submitButton = new Button("Submit");
		tx = new TextField(3);
		ty = new TextField(3);
		ts = new TextField(3);
		tv = new TextField(15);

		add( new Label("X:") );
		add( tx );
		add( new Label("y:") );
		add( ty );
		add( new Label("size:") );
		add( ts );
		add( new Label("text:") );
		add( tv );
		add( submitButton );
		
		submitButton.addActionListener( this );		
	}

	// called when Submit is selected from Text Configuration
	public void actionPerformed( ActionEvent ae )
	{
		int x=250, y=250, s=50;
		String v="Text";
		try
		{
			x = Integer.parseInt( tx.getText() );
			y = Integer.parseInt( ty.getText() );
			s = Integer.parseInt( ts.getText() );
			v = tv.getText();
		}
		catch ( Exception e ){}

		Text t = new Text ( x, y, s, v );
		parent.addImage( t );
		setVisible( false );
	}
}

/**
This class represents a Circle to be drawn in the Frame
Application Window.
*/
class Circle
{
	private int x, y, w, h;
	
	public Circle( int inX, int inY, int inW, int inH )
	{
		x = inX;
		y = inY;
		w = inW;
		h = inH;
	}

	public int getX() { return x; }
	public int getY() { return y; }
	public int getW() { return w; }
	public int getH() { return h; }
	
}

/**
This class represents a Rectangle to be drawn in the Frame
Application Window.
*/
class Rectangle
{
	private int x, y, w, h;
	
	public Rectangle( int inX, int inY, int inW, int inH )
	{
		x = inX;
		y = inY;
		w = inW;
		h = inH;
	}

	public int getX() { return x; }
	public int getY() { return y; }
	public int getW() { return w; }
	public int getH() { return h; }
}

/**
This class represents a String to be drawn in the Frame
Application Window.
*/
class Text
{
	private int x, y, s;
	String v;

	public Text( int inX, int inY, int inS, String inV )
	{
		x = inX;
		y = inY;
		s = inS;
		v = inV;
	}

	public int getX() { return x; }
	public int getY() { return y; }
	public int getS() { return s; }
	public String getV() { return v; }
}