package class8_2_BlurringWithBufferedImage;

import javax.swing.JPanel;
import javax.swing.Timer;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

/**
 * This panel represents a panel that runs steps on an image filter
 * and displays them to the user.
 */
public class VideoImagePanel extends JPanel {
    private Filterer filterer;
    private Timer timer;

    /**
     * Create the image panel.
     */
    public VideoImagePanel() {
        setPreferredSize(new Dimension(512, 512)); // TODO: Use named constants or variables
        filterer = new ImageBlurrer();

        timer = new Timer(16,new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                filterer.doFilterStep();
                repaint();
            }
        });
    }

    /**
     * Start the timer which will cause blurring to occur
     * (see action listener in constructor)
     */
    public void startBlurring() {
        timer.start();
    }

    /**
     * For Swing, we should override paintComponent instead of paint.
     * the actual paint calls paintComponent after painting the borders
     * and before painting the children.
     * @param g what to paint on
     */
    @Override
    public void paintComponent(Graphics g) {
        setSize(512,512);
        super.paintComponent(g);
        Dimension size = super.getSize();
        System.out.println("component size: " + size.getWidth() + "x" + size.getHeight());
        boolean isDoneDrawing = g.drawImage(filterer.getImage(), 0, 0, null);
        if(!isDoneDrawing) {
            System.out.println("Warning: Not done drawing.");
        }
    }
}