source/vslider.cpp

   1 /* $Id$
   2
   3 This file is part of libmspgltk
   4 Copyright © 2007-2008, 2010-2011  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 void VSlider::autosize()
  23 {
  24         if(!style)
  25                 return;
  26
  27         Widget::autosize();
  28
  29         if(const Part *slider_part = style->get_part("slider"))
  30         {
  31                 const Sides &margin = slider_part->get_margin();
  32                 const Geometry &pgeom = slider_part->get_geometry();
  33                 geom.w = std::max(geom.w, pgeom.w+margin.left+margin.right);
  34                 geom.h = std::max(geom.h, pgeom.h*3/2+margin.top+margin.bottom);
  35         }
  36 }
  37
  38 void VSlider::render_special(const Part &part) const
  39 {
  40         if(part.get_name()=="slider")
  41         {
  42                 Alignment align = part.get_alignment();
  43                 if(max>min)
  44                         align.y = (value-min)/(max-min);
  45
  46                 Geometry pgeom = part.get_geometry();
  47                 align.apply(pgeom, geom, part.get_margin());
  48
  49                 GL::push_matrix();
  50                 GL::translate(pgeom.x, pgeom.y, 0);
  51                 part.get_graphic(state)->render(pgeom.w, pgeom.h);
  52                 GL::pop_matrix();
  53         }
  54 }
  55
  56 void VSlider::button_press(int x, int y, unsigned btn)
  57 {
  58         if(btn==1 && geom.is_inside_relative(x, y) && max>min)
  59         {
  60                 int sy = static_cast<int>((geom.h-slider_size)*(value-min)/(max-min));
  61                 if(y<sy)
  62                         set_value(value-step*10);
  63                 else if(y>=static_cast<int>(sy+slider_size))
  64                         set_value(value+step*10);
  65                 else
  66                         start_drag(y);
  67         }
  68 }
  69
  70 void VSlider::button_release(int, int, unsigned btn)
  71 {
  72         if(btn==1 && dragging)
  73                 end_drag();
  74 }
  75
  76 void VSlider::pointer_motion(int, int y)
  77 {
  78         if(dragging)
  79                 drag(y);
  80 }
  81
  82 void VSlider::on_geometry_change()
  83 {
  84         drag_area_size = geom.h-slider_size;
  85 }
  86
  87 void VSlider::on_style_change()
  88 {
  89         if(!style)
  90                 return;
  91
  92         if(const Part *slider_part = style->get_part("slider"))
  93                 slider_size = slider_part->get_geometry().h;
  94
  95         on_geometry_change();
  96 }
  97
  98 } // namespace GLtk
  99 } // namespace Msp
 100