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, CachedPart &cache)
  32 {
  33         if(part.get_name()=="slider")
  34         {
  35                 Alignment align = part.get_alignment();
  36                 if(max>min)
  37                         align.x = (value-min)/(max-min);
  38
  39                 Geometry pgeom = part.get_geometry();
  40                 align.apply(pgeom, geom, part.get_margin());
  41
  42                 cache.texture = part.get_graphic(state)->get_texture();
  43                 cache.clear_mesh();
  44
  45                 GL::MeshBuilder bld(*cache.mesh);
  46                 bld.matrix() *= GL::Matrix::translation(pgeom.x, pgeom.y, 0);
  47                 part.get_graphic(state)->build(pgeom.w, pgeom.h, bld);
  48         }
  49 }
  50
  51 void HSlider::button_press(int x, int y, unsigned btn)
  52 {
  53         if(btn==1 && geom.is_inside_relative(x, y) && max>min)
  54         {
  55                 int sx = static_cast<int>((geom.w-slider_size)*(value-min)/(max-min));
  56                 if(x<sx)
  57                         set_value(value-step*10);
  58                 else if(x>=static_cast<int>(sx+slider_size))
  59                         set_value(value+step*10);
  60                 else
  61                         start_drag(x);
  62         }
  63 }
  64
  65 void HSlider::button_release(int, int, unsigned btn)
  66 {
  67         if(btn==1 && dragging)
  68                 end_drag();
  69 }
  70
  71 void HSlider::pointer_motion(int x, int)
  72 {
  73         if(dragging)
  74                 drag(x);
  75 }
  76
  77 void HSlider::on_geometry_change()
  78 {
  79         drag_area_size = geom.w-slider_size;
  80 }
  81
  82 void HSlider::on_style_change()
  83 {
  84         if(!style)
  85                 return;
  86
  87         if(const Part *slider_part = style->get_part("slider"))
  88                 slider_size = slider_part->get_geometry().w;
  89
  90         on_geometry_change();
  91 }
  92
  93 } // namespace GLtk
  94 } // namespace Msp