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()
  16 {
  17         if(!style)
  18                 return;
  19
  20         Widget::autosize();
  21
  22         if(const Part *slider_part = style->get_part("slider"))
  23         {
  24                 const Sides &margin = slider_part->get_margin();
  25                 const Geometry &pgeom = slider_part->get_geometry();
  26                 geom.w = std::max(geom.w, pgeom.w*3/2+margin.left+margin.right);
  27                 geom.h = std::max(geom.h, pgeom.h+margin.top+margin.bottom);
  28         }
  29 }
  30
  31 void HSlider::rebuild_special(const Part &part)
  32 {
  33         if(part.get_name()=="slider")
  34         {
  35                 const Graphic *graphic = part.get_graphic(state);
  36                 if(!graphic || !graphic->get_texture())
  37                         return;
  38
  39                 Alignment align = part.get_alignment();
  40                 if(max>min)
  41                         align.x = (value-min)/(max-min);
  42
  43                 Geometry pgeom = part.get_geometry();
  44                 align.apply(pgeom, geom, part.get_margin());
  45
  46                 GL::MeshBuilder bld(part_cache.create_mesh(part, *graphic->get_texture()));
  47                 bld.matrix() *= GL::Matrix::translation(pgeom.x, pgeom.y, 0);
  48                 graphic->build(pgeom.w, pgeom.h, bld);
  49         }
  50 }
  51
  52 void HSlider::button_press(int x, int y, unsigned btn)
  53 {
  54         if(btn==1 && geom.is_inside_relative(x, y) && max>min)
  55         {
  56                 int sx = static_cast<int>((geom.w-slider_size)*(value-min)/(max-min));
  57                 if(x<sx)
  58                         set_value(value-step*10);
  59                 else if(x>=static_cast<int>(sx+slider_size))
  60                         set_value(value+step*10);
  61                 else
  62                         start_drag(x);
  63         }
  64 }
  65
  66 void HSlider::button_release(int, int, unsigned btn)
  67 {
  68         if(btn==1 && dragging)
  69                 end_drag();
  70 }
  71
  72 void HSlider::pointer_motion(int x, int)
  73 {
  74         if(dragging)
  75                 drag(x);
  76 }
  77
  78 void HSlider::on_geometry_change()
  79 {
  80         drag_area_size = geom.w-slider_size;
  81 }
  82
  83 void HSlider::on_style_change()
  84 {
  85         if(!style)
  86                 return;
  87
  88         if(const Part *slider_part = style->get_part("slider"))
  89                 slider_size = slider_part->get_geometry().w;
  90
  91         on_geometry_change();
  92 }
  93
  94 } // namespace GLtk
  95 } // namespace Msp