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