source/input/touchscreen.cpp

   1 #include "touchscreen.h"
   2
   3 using namespace std;
   4
   5 namespace Msp {
   6 namespace Input {
   7
   8 Touchscreen::Touchscreen(Graphics::Window &w):
   9         Device(TOUCH_SURFACE),
  10         window(w)
  11 {
  12         if(!is_available())
  13                 throw device_not_available("Touchscreen");
  14
  15         name = "Touchscreen";
  16
  17         window.set_touch_input(true);
  18         window.signal_input_event.connect(sigc::mem_fun(this, &Touchscreen::input_event));
  19 }
  20
  21 Touchscreen::~Touchscreen()
  22 {
  23         window.set_touch_input(false);
  24 }
  25
  26 string Touchscreen::get_button_name(unsigned btn) const
  27 {
  28         if(btn==0)
  29                 return "Primary touch";
  30         else
  31                 return Device::get_button_name(btn);
  32 }
  33
  34 string Touchscreen::get_axis_name(unsigned axis) const
  35 {
  36         if(axis==0)
  37                 return "Primary touch X";
  38         else if(axis==1)
  39                 return "Primary touch Y";
  40         else
  41                 return Device::get_axis_name(axis);
  42 }
  43
  44 unsigned Touchscreen::map_point_id(unsigned id)
  45 {
  46         unsigned unused = active_points.size();
  47         for(unsigned i=0; i<active_points.size(); ++i)
  48         {
  49                 if(active_points[i]==id)
  50                         return i;
  51                 else if(active_points[i]==UNUSED && i<unused)
  52                         unused = i;
  53         }
  54
  55         if(unused<active_points.size())
  56                 active_points[unused] = id;
  57         else
  58                 active_points.push_back(id);
  59
  60         return unused;
  61 }
  62
  63 void Touchscreen::touch_down(unsigned id)
  64 {
  65         unsigned i = map_point_id(id);
  66         set_button_state(i, true, true);
  67 }
  68
  69 void Touchscreen::touch_move(unsigned id, float x, float y)
  70 {
  71         unsigned i = map_point_id(id);
  72         set_axis_value(i*2, x, true);
  73         set_axis_value(i*2+1, y, true);
  74 }
  75
  76 void Touchscreen::touch_up(unsigned id)
  77 {
  78         unsigned i = map_point_id(id);
  79         set_button_state(i, false, true);
  80         active_points[i] = UNUSED;
  81 }
  82
  83 } // namespace Input
  84 } // namespace Msp