@Override
public void mouseClicked(MouseEvent e) {
	// TODO Auto-generated method stub
	if (e.getSource() == LineBtn){
		LineClicked = true ;
	}



}


@Override
public void mousePressed(MouseEvent e) {
	// TODO Auto-generated method stub
	if (LineClicked){
		OldX = e.getX();
		OldY = e.getY();
	}

}
@Override
public void mouseReleased(MouseEvent e) {
	// TODO Auto-generated method stub
	CurrentX=e.getX();
	CurrentY=e.getY();

	if (sketch.graphic !=null){
		sketch.graphic.drawLine(OldX , OldY , CurrentX , CurrentY);
		repaint();
		OldX = CurrentX;
		OldY = CurrentY;
	}
}