class ImageComponent extends JComponent implements MouseListener, MouseMotionListener, Runnable
{
private static final long serialVersionUID = 1L;
public BufferedImage buff;
private int zoom;
private int x0=0,y0=0;
JComponent k = this;
Stack<Point> s = new Stack<Point>();
public ImageComponent(int w, int h, int z)
{
Dimension imgdim = new Dimension(w*z,h*z);
zoom = z;
buff = new BufferedImage(w,h, BufferedImage.TYPE_INT_ARGB);
Graphics g = buff.getGraphics();
g.setColor(Color.WHITE);
g.fillRect(0,0, w,h);
this.setMinimumSize(imgdim);
this.setMaximumSize(imgdim);
this.addMouseListener(this);
this.addMouseMotionListener(this);
new Thread(this).start();
}
public void paintComponent(Graphics g)
{
g.drawImage(buff, 0,0, buff.getWidth()*zoom, buff.getHeight()*zoom, null);
}
public void mouseDragged(MouseEvent e)
{
s.push(new Point(e.getX(), e.getY()));
}
public void mouseMoved(MouseEvent e)
{}
public void mouseClicked(MouseEvent e)
{}
public void mousePressed(MouseEvent e)
{
x0 = e.getX()/zoom;
y0 = e.getY()/zoom;
}
public void mouseReleased(MouseEvent e)
{}
public void mouseEntered(MouseEvent e)
{}
public void mouseExited(MouseEvent e)
{}
public void run() {
while (true) {
if (! s.empty()) {
Point p = s.pop();
int x = (int)p.getX()/zoom;
int y = (int)p.getY()/zoom;
Graphics g = buff.getGraphics();
g.setColor(Color.BLACK);
g.drawLine(x0,y0, x,y);
x0=x;
y0=y;
repaint();
} else {
try {
Thread.sleep(200);
} catch (InterruptedException e) {
}
System.out.println("empty");
}
}
}
}
