source/hslider.cpp

   1 #include <msp/gl/matrix.h>
   2 #include <msp/gl/transform.h>
   3 #include "graphic.h"
   4 #include "hslider.h"
   5 #include "part.h"
   6 #include "style.h"
   7
   8 namespace Msp {
   9 namespace GLtk {
  10
  11 HSlider::HSlider(const Resources &r):
  12         Slider(r),
  13         dragging(false)
  14 {
  15         update_style();
  16 }
  17
  18 void HSlider::button_press(int x, int y, unsigned btn)
  19 {
  20         if(geom.is_inside(x, y))
  21         {
  22                 int sw=get_slider_width();
  23                 int sx=static_cast<int>((geom.w-sw)*(value-min)/(max-min));
  24                 if(btn==1 && x>=sx && x<sx+sw)
  25                 {
  26                         dragging=true;
  27                         state=ACTIVE;
  28                         drag_start_x=x;
  29                         drag_start_value=value;
  30                 }
  31         }
  32 }
  33
  34 void HSlider::button_release(int, int, unsigned btn)
  35 {
  36         if(btn==1)
  37         {
  38                 dragging=false;
  39                 state=NORMAL;
  40         }
  41 }
  42
  43 void HSlider::pointer_motion(int x, int)
  44 {
  45         if(dragging)
  46         {
  47                 set_value(drag_start_value+(x-drag_start_x)*(max-min)/(geom.w-get_slider_width()));
  48         }
  49 }
  50
  51 void HSlider::render_part(const Part &part) const
  52 {
  53         if(part.get_name()=="slider")
  54         {
  55                 unsigned gw=part.get_width();
  56                 unsigned gh=(part.get_fill_y() ? geom.h : part.get_height());
  57                 GL::push_matrix();
  58                 GL::translate((geom.w-gw)*(value-min)/(max-min), (geom.h-gh)*(part.get_alignment().y+1)/2, 0);
  59                 const Graphic *graphic=part.get_graphic(state);
  60                 graphic->render(gw, gh);
  61                 GL::pop_matrix();
  62         }
  63         else
  64                 Widget::render_part(part);
  65 }
  66
  67 unsigned HSlider::get_slider_width() const
  68 {
  69         for(PartSeq::const_iterator i=style->get_parts().begin(); i!=style->get_parts().end(); ++i)
  70                 if(i->get_name()=="slider")
  71                         return i->get_width();
  72
  73         return 0;
  74 }
  75
  76 } // namespace GLtk
  77 } // namespace Msp