source/vslider.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 "part.h"
  12 #include "style.h"
  13 #include "vslider.h"
  14
  15 namespace Msp {
  16 namespace GLtk {
  17
  18 VSlider::VSlider(const Resources &r):
  19         Slider(r)
  20 {
  21         update_style();
  22 }
  23
  24 void VSlider::button_press(int x, int y, unsigned btn)
  25 {
  26         if(geom.is_inside_relative(x, y) && max>min)
  27         {
  28                 int sy=static_cast<int>((geom.h-slider_size)*(value-min)/(max-min));
  29                 if(btn==1 && y>=sy && y<static_cast<int>(sy+slider_size))
  30                 {
  31                         state=ACTIVE;
  32                         start_drag(y);
  33                 }
  34         }
  35 }
  36
  37 void VSlider::button_release(int, int, unsigned btn)
  38 {
  39         if(btn==1 && dragging)
  40         {
  41                 end_drag();
  42                 state=NORMAL;
  43         }
  44 }
  45
  46 void VSlider::pointer_motion(int, int y)
  47 {
  48         if(dragging)
  49                 drag(y);
  50 }
  51
  52 void VSlider::render_special(const Part &part) const
  53 {
  54         if(part.get_name()=="slider")
  55         {
  56                 Alignment align=part.get_alignment();
  57                 if(max>min)
  58                         align.y=(value-min)/(max-min);
  59
  60                 Geometry pgeom=part.get_geometry();
  61                 align.apply(pgeom, geom, part.get_margin());
  62
  63                 GL::push_matrix();
  64                 GL::translate(pgeom.x, pgeom.y, 0);
  65                 part.get_graphic(state)->render(pgeom.w, pgeom.h);
  66                 GL::pop_matrix();
  67         }
  68 }
  69
  70 void VSlider::on_geometry_change()
  71 {
  72         drag_area_size=geom.h-slider_size;
  73 }
  74
  75 void VSlider::on_style_change()
  76 {
  77         for(PartSeq::const_iterator i=style->get_parts().begin(); i!=style->get_parts().end(); ++i)
  78                 if(i->get_name()=="slider")
  79                         slider_size=i->get_geometry().h;
  80
  81         on_geometry_change();
  82 }
  83
  84 } // namespace GLtk
  85 } // namespace Msp
  86