Exemplo n.º 1
0
 public void mouseDragged(MouseEvent e) {
   int x = e.getX(), y = e.getY(), dx = lastX - x, dy = lastY - y;
   lastX = x;
   lastY = y;
   if (first == null) {
     Line line = addLine(point1, new Point(x, y));
     if (line != null) {
       canvas.add(line.getP2());
       first = line.getP2();
       canvas.add(line);
     }
   } else {
     first.move(-dx, -dy);
   }
   repaint();
 }
Exemplo n.º 2
0
    private Line addLine(Point p1, Point p2) {
      if (Math.abs(p1.getX() - p2.getX()) < 5 || Math.abs(p1.getY() - p2.getY()) < 5) {
        return null;
      }

      Line line = null;
      if (p1 != null && p2 != null) {
        line = new Line(p1, p2);
        canvas.add(line);
      }
      repaint();
      return line;
    }
Exemplo n.º 3
0
 private Point addPoint(int x, int y) {
   Point p = new Point(x, y);
   canvas.add(p);
   repaint();
   return p;
 }