source/input/smoothcontrol.cpp

   1 #include "smoothcontrol.h"
   2
   3 namespace Msp {
   4 namespace Input {
   5
   6 SmoothControl::SmoothControl():
   7         value(0),
   8         paired_ctrl(0),
   9         dead_zone(0.1),
  10         threshold(0.9)
  11 { }
  12
  13 SmoothControl::SmoothControl(const ControlSource &s):
  14         Control(s),
  15         value(0),
  16         paired_ctrl(0),
  17         dead_zone(0.1),
  18         threshold(0.9)
  19 { }
  20
  21 SmoothControl::SmoothControl(Device &d, ControlSrcType t, unsigned i):
  22         Control(d, t, i),
  23         value(0),
  24         paired_ctrl(0),
  25         dead_zone(0.1),
  26         threshold(0.9)
  27 { }
  28
  29 SmoothControl::~SmoothControl()
  30 {
  31         pair(0);
  32 }
  33
  34 void SmoothControl::set_dead_zone(float d)
  35 {
  36         dead_zone=d;
  37 }
  38
  39 void SmoothControl::set_threshold(float t)
  40 {
  41         threshold=t;
  42 }
  43
  44 void SmoothControl::pair(SmoothControl *ctrl)
  45 {
  46         if(ctrl==paired_ctrl)
  47                 return;
  48
  49         if(paired_ctrl)
  50         {
  51                 SmoothControl *old_pair=paired_ctrl;
  52                 paired_ctrl=0;
  53                 old_pair->pair(0);
  54         }
  55
  56         paired_ctrl=ctrl;
  57
  58         if(paired_ctrl)
  59                 paired_ctrl->pair(this);
  60 }
  61
  62 void SmoothControl::on_press()
  63 {
  64         on_motion(1, 1-value);
  65 }
  66
  67 void SmoothControl::on_release()
  68 {
  69         if(value>0)
  70                 on_motion(0, -value);
  71 }
  72
  73 void SmoothControl::on_motion(float v, float r)
  74 {
  75         if(v<-threshold)
  76                 value=-1;
  77         else if(v>threshold)
  78                 value=1;
  79         else if(v<-dead_zone)
  80                 value=(v+dead_zone)/(threshold-dead_zone);
  81         else if(v>dead_zone)
  82                 value=(v-dead_zone)/(threshold-dead_zone);
  83         else
  84                 value=0;
  85
  86         signal_motion.emit(value);
  87
  88         if(paired_ctrl && (v>0 || (v==0 && paired_ctrl->value!=0)))
  89                 paired_ctrl->on_motion(-v, -r);
  90 }
  91
  92 } // namespace Input
  93 } // namespace Msp