source/vslider.cpp

   1 #include <msp/gl/matrix.h>
   2 #include <msp/gl/meshbuilder.h>
   3 #include "graphic.h"
   4 #include "part.h"
   5 #include "style.h"
   6 #include "vslider.h"
   7
   8 namespace Msp {
   9 namespace GLtk {
  10
  11 VSlider::VSlider():
  12         slider_size(1)
  13 { }
  14
  15 void VSlider::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+margin.left+margin.right);
  27                 geom.h = std::max(geom.h, pgeom.h*3/2+margin.top+margin.bottom);
  28         }
  29 }
  30
  31 void VSlider::rebuild_special(const Part &part, CachedPart &cache)
  32 {
  33         if(part.get_name()=="slider")
  34         {
  35                 const Graphic *graphic = part.get_graphic(state);
  36                 if(!graphic)
  37                         return;
  38
  39                 Alignment align = part.get_alignment();
  40                 if(max>min)
  41                         align.y = (value-min)/(max-min);
  42
  43                 Geometry pgeom = part.get_geometry();
  44                 align.apply(pgeom, geom, part.get_margin());
  45
  46                 cache.texture = part.get_graphic(state)->get_texture();
  47                 cache.clear_mesh();
  48
  49                 GL::MeshBuilder bld(*cache.mesh);
  50                 bld.matrix() *= GL::Matrix::translation(pgeom.x, pgeom.y, 0);
  51                 graphic->build(pgeom.w, pgeom.h, bld);
  52         }
  53 }
  54
  55 void VSlider::button_press(int x, int y, unsigned btn)
  56 {
  57         if(btn==1 && geom.is_inside_relative(x, y) && max>min)
  58         {
  59                 int sy = static_cast<int>((geom.h-slider_size)*(value-min)/(max-min));
  60                 if(y<sy)
  61                         set_value(value-step*10);
  62                 else if(y>=static_cast<int>(sy+slider_size))
  63                         set_value(value+step*10);
  64                 else
  65                         start_drag(y);
  66         }
  67 }
  68
  69 void VSlider::button_release(int, int, unsigned btn)
  70 {
  71         if(btn==1 && dragging)
  72                 end_drag();
  73 }
  74
  75 void VSlider::pointer_motion(int, int y)
  76 {
  77         if(dragging)
  78                 drag(y);
  79 }
  80
  81 void VSlider::on_geometry_change()
  82 {
  83         drag_area_size = geom.h-slider_size;
  84 }
  85
  86 void VSlider::on_style_change()
  87 {
  88         if(!style)
  89                 return;
  90
  91         if(const Part *slider_part = style->get_part("slider"))
  92                 slider_size = slider_part->get_geometry().h;
  93
  94         on_geometry_change();
  95 }
  96
  97 } // namespace GLtk
  98 } // namespace Msp
  99