source/hslider.cpp

   1 #include <msp/gl/matrix.h>
   2 #include <msp/gl/meshbuilder.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():
  12         slider_size(1)
  13 { }
  14
  15 void HSlider::autosize_special(const Part &part, Geometry &ageom)
  16 {
  17         if(part.get_name()=="slider")
  18         {
  19                 const Sides &margin = part.get_margin();
  20                 const Geometry &pgeom = part.get_geometry();
  21                 ageom.w = std::max(ageom.w, pgeom.w*3/2+margin.left+margin.right);
  22                 ageom.h = std::max(ageom.h, pgeom.h+margin.top+margin.bottom);
  23         }
  24 }
  25
  26 void HSlider::rebuild_special(const Part &part)
  27 {
  28         if(part.get_name()=="slider")
  29         {
  30                 const Graphic *graphic = part.get_graphic(state);
  31                 if(!graphic || !graphic->get_texture())
  32                         return;
  33
  34                 Alignment align = part.get_alignment();
  35                 if(max>min)
  36                         align.x = (value-min)/(max-min);
  37
  38                 Geometry pgeom = part.get_geometry();
  39                 align.apply(pgeom, geom, part.get_margin());
  40
  41                 GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
  42                 bld.matrix() *= GL::Matrix::translation(pgeom.x, pgeom.y, 0);
  43                 graphic->build(pgeom.w, pgeom.h, bld);
  44         }
  45 }
  46
  47 void HSlider::button_press(int x, int y, unsigned btn)
  48 {
  49         if(btn==1 && geom.is_inside_relative(x, y) && max>min)
  50         {
  51                 int sx = static_cast<int>((geom.w-slider_size)*(value-min)/(max-min));
  52                 if(x<sx)
  53                         set_value(value-step*10);
  54                 else if(x>=static_cast<int>(sx+slider_size))
  55                         set_value(value+step*10);
  56                 else
  57                         start_drag(x);
  58         }
  59 }
  60
  61 void HSlider::button_release(int, int, unsigned btn)
  62 {
  63         if(btn==1 && dragging)
  64                 end_drag();
  65 }
  66
  67 void HSlider::pointer_motion(int x, int)
  68 {
  69         if(dragging)
  70                 drag(x);
  71 }
  72
  73 void HSlider::on_geometry_change()
  74 {
  75         drag_area_size = geom.w-slider_size;
  76 }
  77
  78 void HSlider::on_style_change()
  79 {
  80         if(!style)
  81                 return;
  82
  83         if(const Part *slider_part = style->get_part("slider"))
  84                 slider_size = slider_part->get_geometry().w;
  85
  86         on_geometry_change();
  87 }
  88
  89 } // namespace GLtk
  90 } // namespace Msp