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