source/vslider.cpp

   1 /* $Id$
   2
   3 This file is part of libmspgltk
   4 Copyright © 2007  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include <msp/gl/matrix.h>
   9 #include <msp/gl/transform.h>
  10 #include "graphic.h"
  11 #include "part.h"
  12 #include "style.h"
  13 #include "vslider.h"
  14
  15 namespace Msp {
  16 namespace GLtk {
  17
  18 VSlider::VSlider(const Resources &r):
  19         Slider(r)
  20 {
  21         update_style();
  22 }
  23
  24 void VSlider::button_press(int x, int y, unsigned btn)
  25 {
  26         if(btn==1 && geom.is_inside_relative(x, y) && max>min)
  27         {
  28                 int sy=static_cast<int>((geom.h-slider_size)*(value-min)/(max-min));
  29                 if(y<sy)
  30                         set_value(value-step*10);
  31                 else if(y>=static_cast<int>(sy+slider_size))
  32                         set_value(value+step*10);
  33                 else
  34                         start_drag(y);
  35         }
  36 }
  37
  38 void VSlider::button_release(int, int, unsigned btn)
  39 {
  40         if(btn==1 && dragging)
  41                 end_drag();
  42 }
  43
  44 void VSlider::pointer_motion(int, int y)
  45 {
  46         if(dragging)
  47                 drag(y);
  48 }
  49
  50 void VSlider::render_special(const Part &part) const
  51 {
  52         if(part.get_name()=="slider")
  53         {
  54                 Alignment align=part.get_alignment();
  55                 if(max>min)
  56                         align.y=(value-min)/(max-min);
  57
  58                 Geometry pgeom=part.get_geometry();
  59                 align.apply(pgeom, geom, part.get_margin());
  60
  61                 GL::push_matrix();
  62                 GL::translate(pgeom.x, pgeom.y, 0);
  63                 part.get_graphic(state)->render(pgeom.w, pgeom.h);
  64                 GL::pop_matrix();
  65         }
  66 }
  67
  68 void VSlider::on_geometry_change()
  69 {
  70         drag_area_size=geom.h-slider_size;
  71 }
  72
  73 void VSlider::on_style_change()
  74 {
  75         for(PartSeq::const_iterator i=style->get_parts().begin(); i!=style->get_parts().end(); ++i)
  76                 if(i->get_name()=="slider")
  77                         slider_size=i->get_geometry().h;
  78
  79         on_geometry_change();
  80 }
  81
  82 } // namespace GLtk
  83 } // namespace Msp
  84