File "DrawingShapes.java"

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package toto;

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

public class DrawingShapes extends JFrame
{

	// JPanel for the shape and color controls
	private JPanel controlsJPanel;
	// JComboBox to allow selection of a shape
	private JComboBox shapeJComboBox;
	// JButton to select the color
	private JButton colorJButton;
	// PaintJPanel for drawing shapes
	private PaintJPanel painterPaintJPanel;
	
	// array of shape types
	private	String[] shapeTypes = {"Line","Rectangle","Oval"};
	
	public DrawingShapes()
	{
		createUserInterface();
	}


	// create and position GUI components; register event handlers
	private void createUserInterface()
	{
		// get content pane for attaching GUI components
		Container contentPane = getContentPane();
		// enable explicit positioning of GUI components
		contentPane.setLayout(null);

		// set up controlsJPanel
		controlsJPanel = new JPanel();
		controlsJPanel.setBounds(0,0,400,40);
		controlsJPanel.setLayout(null);
		contentPane.add( controlsJPanel );
		
		// set up painterPaintJPanel
		painterPaintJPanel = new PaintJPanel();
		painterPaintJPanel.setBounds(0,40,400,340);
		painterPaintJPanel.setBackground(Color.WHITE);
		contentPane.add( painterPaintJPanel ); 
		
		// set up shapeJComboBox
		shapeJComboBox = new JComboBox( shapeTypes );
		shapeJComboBox.setBounds(90,2,100,24);
		controlsJPanel.add( shapeJComboBox );
		shapeJComboBox.addActionListener(

		new ActionListener()// anonymous inner class
		{
			// event method called when shapeJComboBox is selected

			public void actionPerformed( ActionEvent event )
			{
				shapeJComboBoxActionPerformed( event );
			}
		} // end anonymous inner class

		);	// end call to addActionListener


		// set up colorJButton
		colorJButton = new JButton();
		colorJButton.setBounds(210,2,80,24);
		colorJButton.setText("Color");
		controlsJPanel.add( colorJButton );
		
		colorJButton.addActionListener(
		new ActionListener() // anonymous inner class
		{
		// event handler called when colorJButton is pressed
			public void actionPerformed( ActionEvent event )
			{
				colorJButtonActionPerformed( event );
			}
		} // end anonymous inner class
		); // end call to addActionListener


	// set properties of application’s window
	setTitle("Drawing Shapes");
	// set title bar string
	setSize(408,407);
	// set window size
	setVisible(true);
	// display window
}	// end method createUserInterface


// select a new color for the shape
private void colorJButtonActionPerformed( ActionEvent event )
{
	Color selection = JColorChooser.showDialog(null,
	"Select a Color",Color.BLACK);

	if ( selection != null)
	{
		colorJButton.setBackground( selection );
		painterPaintJPanel.setCurrentColor( selection );
	}
} // end method colorJButtonActionPerformed


// set the selected shape in the painting panel
private void shapeJComboBoxActionPerformed( ActionEvent event )
{
	painterPaintJPanel.setCurrentShapeType(
	( String )shapeJComboBox.getSelectedItem() );

} // end method shapeJComboBoxActionPerformed


	// main method
	public static void main( String args[] )
	{
		DrawingShapes application = new DrawingShapes();
		application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}// end method main
}