java - How to know mouseDragged direction - when it's up or down? -

finishing create custom scrollbar, , question is:

addmousemotionlistener(new mousemotionadapter() {     @override     public void mousedragged(mouseevent e) {          //how know mouse direction - or down?      } }); 

maybe there simple method, or have manually?

you have manually need mouseadapter instead of mousemotionadapter record initial y co-ordinate.

addmousemotionlistener(new mouseadapter() {      int previousy;      @override     public void mousepressed(mouseevent e) {         previousy = e.gety();     }      @override     public void mousedragged(mouseevent e) {          int y = e.gety();         if (y < previousy) {             system.out.println("up");         } else if (y > previousy) {             system.out.println("down");         }          previousy = y;     } });