DrawingPanel.java

/** Drawing Panel displays the circles the user has created via mouse clicks
 * 
 * @author (Greg Johnson) 
 * @version (November 1, 2017)
 */
import java.awt.*;
import javax.swing.*;
import javax.swing.event.*;
import com.sun.xml.internal.bind.v2.runtime.reflect.ListIterator;
import jdk.internal.dynalink.beans.StaticClass;
import java.awt.event.*;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Random;

public class DrawingPanel extends JPanel 
{
        SmartEllipse	_circle = null;
        ArrayList<SuperEllipse> EllipseList = new ArrayList<SuperEllipse>();
        JButton sButton = new JButton("Save to file");
        JButton rButton = new JButton("Read from file");
        JPanel panel = new JPanel();
        private KeySListener _saveKey;
        private KeyOListener _openKey;
        Random rand = new Random();
        
        
    /**
     * Constructor for objects of class ObjectPanel
     */
    public DrawingPanel()
    {
    	set_saveKey(new KeySListener(this));
    	set_openKey(new KeyOListener(this));
    	this.add(sButton);
    	this.add(rButton);
		MyMouseListener myMouseListener = new MyMouseListener(this);
        
        // set up the display on the panel
        this.setBackground(Color.WHITE);

        // add the panel as a MouseListener
        this.addMouseListener(myMouseListener);
        
        sButton.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
	            JFileChooser fileDialog = new JFileChooser();
	            int returnVal = fileDialog.showSaveDialog(sButton);
				if (returnVal == JFileChooser.APPROVE_OPTION) {
	            try (ObjectOutputStream objectOutputStream =  new ObjectOutputStream( new FileOutputStream(fileDialog.getSelectedFile()));)
	            {

	            	//ObjectOutputStream objectOutputStream =  new ObjectOutputStream(new FileOutputStream("object.data"));
	                objectOutputStream.writeObject(EllipseList);
	            	objectOutputStream.close();

				} catch (Exception e2) {
					e2.printStackTrace();
				}

			}}

		});
        rButton.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
	            JFileChooser fileDialog = new JFileChooser();
	            int returnVal = fileDialog.showOpenDialog(rButton);
				if (returnVal == JFileChooser.APPROVE_OPTION) {
				try(ObjectInputStream objectInputStream = new ObjectInputStream(new FileInputStream(fileDialog.getSelectedFile()));){
					EllipseList= (ArrayList<SuperEllipse>) objectInputStream.readObject();
					getParent().repaint();
				}
				catch (Exception e2) {
					// TODO: handle exception
					e2.printStackTrace();
    }}}
        });
    }
   
    /**
     * The paintComponent method of class DrawingPanel is responsible for painting
     * the panel any time there is a change in the panel.
     */
    public void paintComponent(Graphics aBrush)
    {
        super.paintComponent(aBrush);
        Graphics2D aBetterBrush = (Graphics2D)aBrush;
        for(SuperEllipse smartEllipse : EllipseList) {
        	smartEllipse.fill(aBetterBrush);
        }
    }
     
    /**
     * The mouseClicked method will create a new SmartEllipse
     * and (eventually) add it to the ArrayList of dots in the drawing area
     */
     public void mouseClicked(java.awt.event.MouseEvent e)
     {
        Point currentPoint;
        // get the current mouse location
        currentPoint = e.getPoint();

		//create a new circle and put draw it on the panel
		_circle = new SuperEllipse(get_color());
		_circle.setSize(20,20);							//dot on screen is 20 by 20 pixels
		_circle.setLocation(currentPoint.x-10, currentPoint.y-10);  //subtracting 10 from x and y centers the circle on the mouse click
		repaint();	
		EllipseList.add((SuperEllipse) _circle);
    }   
     
     private Color get_color() {
    	int red = rand.nextInt(250);
    	int blue = rand.nextInt(250);
    	int green = rand.nextInt(250);
    	return new Color(red, blue, green);
     }
     
     
     public KeySListener get_saveKey() {
		return _saveKey;
	}

	public void set_saveKey(KeySListener _saveKey) {
		this._saveKey = _saveKey;
	}
	
	public KeyOListener get_openKey() {
		return _openKey;
	}

	public void set_openKey(KeyOListener _openKey) {
		this._openKey = _openKey;
	}

	private class KeySListener extends KeyInteractor{
    	 public KeySListener(JPanel p) {
    		 super(p, KeyEvent.VK_S);
    	 }
    	 public void actionPerformed(ActionEvent e) {
    		 sButton.doClick();
    	 }
     }
     
     private class KeyOListener extends KeyInteractor{
    	 public KeyOListener(JPanel p) {
    		 super(p, KeyEvent.VK_O);
    	 }
    	 public void actionPerformed(ActionEvent e) {
    		 rButton.doClick();
    	 }
     }
     
}