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():
  19         slider_size(1)
  20 {
  21 }
  22
  23 void VSlider::button_press(int x, int y, unsigned btn)
  24 {
  25         if(btn==1 && geom.is_inside_relative(x, y) && max>min)
  26         {
  27                 int sy = static_cast<int>((geom.h-slider_size)*(value-min)/(max-min));
  28                 if(y<sy)
  29                         set_value(value-step*10);
  30                 else if(y>=static_cast<int>(sy+slider_size))
  31                         set_value(value+step*10);
  32                 else
  33                         start_drag(y);
  34         }
  35 }
  36
  37 void VSlider::button_release(int, int, unsigned btn)
  38 {
  39         if(btn==1 && dragging)
  40                 end_drag();
  41 }
  42
  43 void VSlider::pointer_motion(int, int y)
  44 {
  45         if(dragging)
  46                 drag(y);
  47 }
  48
  49 void VSlider::render_special(const Part &part) const
  50 {
  51         if(part.get_name()=="slider")
  52         {
  53                 Alignment align = part.get_alignment();
  54                 if(max>min)
  55                         align.y = (value-min)/(max-min);
  56
  57                 Geometry pgeom = part.get_geometry();
  58                 align.apply(pgeom, geom, part.get_margin());
  59
  60                 GL::push_matrix();
  61                 GL::translate(pgeom.x, pgeom.y, 0);
  62                 part.get_graphic(state)->render(pgeom.w, pgeom.h);
  63                 GL::pop_matrix();
  64         }
  65 }
  66
  67 void VSlider::on_geometry_change()
  68 {
  69         drag_area_size = geom.h-slider_size;
  70 }
  71
  72 void VSlider::on_style_change()
  73 {
  74         if(!style)
  75                 return;
  76
  77         if(const Part *slider_part = style->get_part("slider"))
  78                 slider_size = slider_part->get_geometry().h;
  79
  80         on_geometry_change();
  81 }
  82
  83 } // namespace GLtk
  84 } // namespace Msp
  85