source/draghandle.cpp

   1 #include "container.h"
   2 #include "draghandle.h"
   3
   4 namespace Msp {
   5 namespace GLtk {
   6
   7 DragHandle::DragHandle():
   8         dragging(false),
   9         drag_x(0),
  10         drag_y(0)
  11 { }
  12
  13 void DragHandle::button_press(int x, int y, unsigned btn)
  14 {
  15         if(btn==1 && parent)
  16         {
  17                 dragging = true;
  18                 drag_x = x;
  19                 drag_y = y;
  20         }
  21 }
  22
  23 void DragHandle::button_release(int, int, unsigned btn)
  24 {
  25         if(btn==1)
  26                 dragging = false;
  27 }
  28
  29 void DragHandle::pointer_motion(int x, int y)
  30 {
  31         if(dragging)
  32         {
  33                 const Geometry &pgeom = parent->get_geometry();
  34                 parent->set_position(pgeom.x+x-drag_x, pgeom.y+y-drag_y);
  35         }
  36 }
  37
  38 void DragHandle::on_reparent()
  39 {
  40         dragging = false;
  41 }
  42
  43 } // namespace GLtk
  44 } // namespace Msp