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