# NOTE: Derived from ..\blib\lib\Tk\Scrollbar.pm.  Changes made here will be lost.
package Tk::Scrollbar;

# tkScrollDrag --
# This procedure is called for each mouse motion even when the slider
# is being dragged.  It notifies the associated widget if we're not
# jump scrolling, and it just updates the scrollbar if we are jump
# scrolling.
#
# Arguments:
# w -		The scrollbar widget.
# x, y -	The current mouse position.

sub Drag 
{my $w = shift;
 my $e = $w->XEvent;
 return unless (defined $initMouse);
 my $f = $w->fraction($e->x,$e->y);
 my $delta = $f - $initMouse;
 if ($w->cget("-jump"))
  {
   if (@initValues == 2)
    {
     $w->set($initValues[0]+$delta,$initValues[1]+$delta);
    }
   else
    {
     $delta = int($delta * $initValues[0]);
     $initValues[2] += $delta;
     $initValues[3] += $delta;
     $w->set(@initValues);
    }
  }
 else
  {
   $w->ScrlToPos($initPos+$delta);
  }
}

1;
