source/hslider.cpp

   1 /* $Id$
   2
   3 This file is part of libmspgltk
   4 Copyright © 2007  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include <msp/gl/matrix.h>
   9 #include <msp/gl/transform.h>
  10 #include "graphic.h"
  11 #include "hslider.h"
  12 #include "part.h"
  13 #include "style.h"
  14
  15 namespace Msp {
  16 namespace GLtk {
  17
  18 HSlider::HSlider(const Resources &r):
  19         Slider(r)
  20 {
  21         update_style();
  22 }
  23
  24 void HSlider::button_press(int x, int y, unsigned btn)
  25 {
  26         if(geom.is_inside(x, y))
  27         {
  28                 int sx=geom.x+static_cast<int>((geom.w-slider_size)*(value-min)/(max-min));
  29                 if(btn==1 && x>=sx && x<static_cast<int>(sx+slider_size))
  30                         start_drag(x);
  31         }
  32 }
  33
  34 void HSlider::button_release(int, int, unsigned btn)
  35 {
  36         if(btn==1)
  37                 end_drag();
  38 }
  39
  40 void HSlider::pointer_motion(int x, int)
  41 {
  42         if(dragging)
  43                 drag(x);
  44 }
  45
  46 void HSlider::render_special(const Part &part) const
  47 {
  48         if(part.get_name()=="slider")
  49         {
  50                 Alignment align=part.get_alignment();
  51                 if(max>min)
  52                         align.x=(value-min)/(max-min);
  53
  54                 Geometry pgeom=part.get_geometry();
  55                 align.apply(pgeom, geom, part.get_margin());
  56
  57                 GL::push_matrix();
  58                 GL::translate(pgeom.x, pgeom.y, 0);
  59                 part.get_graphic(state)->render(pgeom.w, pgeom.h);
  60                 GL::pop_matrix();
  61         }
  62 }
  63
  64 void HSlider::on_geometry_change()
  65 {
  66         drag_area_size=geom.w-slider_size;
  67 }
  68
  69 void HSlider::on_style_change()
  70 {
  71         for(PartSeq::const_iterator i=style->get_parts().begin(); i!=style->get_parts().end(); ++i)
  72                 if(i->get_name()=="slider")
  73                         slider_size=i->get_geometry().w;
  74
  75         on_geometry_change();
  76 }
  77
  78 } // namespace GLtk
  79 } // namespace Msp