source/input/smoothcontrol.cpp

   1 /* $Id$
   2
   3 This file is part of libmspgbase
   4 Copyright © 2007 Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include "smoothcontrol.h"
   9
  10 namespace Msp {
  11 namespace Input {
  12
  13 SmoothControl::SmoothControl():
  14         value(0),
  15         paired_ctrl(0),
  16         dead_zone(0.1),
  17         threshold(0.9)
  18 { }
  19
  20 SmoothControl::SmoothControl(const ControlSource &s):
  21         Control(s),
  22         value(0),
  23         paired_ctrl(0),
  24         dead_zone(0.1),
  25         threshold(0.9)
  26 { }
  27
  28 SmoothControl::SmoothControl(Device &d, ControlSrcType t, unsigned i):
  29         Control(d, t, i),
  30         value(0),
  31         paired_ctrl(0),
  32         dead_zone(0.1),
  33         threshold(0.9)
  34 { }
  35
  36 SmoothControl::~SmoothControl()
  37 {
  38         pair(0);
  39 }
  40
  41 void SmoothControl::set_dead_zone(float d)
  42 {
  43         dead_zone=d;
  44 }
  45
  46 void SmoothControl::set_threshold(float t)
  47 {
  48         threshold=t;
  49 }
  50
  51 void SmoothControl::pair(SmoothControl *ctrl)
  52 {
  53         if(ctrl==paired_ctrl)
  54                 return;
  55
  56         if(paired_ctrl)
  57         {
  58                 SmoothControl *old_pair=paired_ctrl;
  59                 paired_ctrl=0;
  60                 old_pair->pair(0);
  61         }
  62
  63         paired_ctrl=ctrl;
  64
  65         if(paired_ctrl)
  66                 paired_ctrl->pair(this);
  67 }
  68
  69 void SmoothControl::on_press()
  70 {
  71         on_motion(1, 1-value);
  72 }
  73
  74 void SmoothControl::on_release()
  75 {
  76         if(value>0)
  77                 on_motion(0, -value);
  78 }
  79
  80 void SmoothControl::on_motion(float v, float r)
  81 {
  82         if(v<-threshold)
  83                 value=-1;
  84         else if(v>threshold)
  85                 value=1;
  86         else if(v<-dead_zone)
  87                 value=(v+dead_zone)/(threshold-dead_zone);
  88         else if(v>dead_zone)
  89                 value=(v-dead_zone)/(threshold-dead_zone);
  90         else
  91                 value=0;
  92
  93         signal_motion.emit(value);
  94
  95         if(paired_ctrl && (v>0 || (v==0 && paired_ctrl->value!=0)))
  96                 paired_ctrl->on_motion(-v, -r);
  97 }
  98
  99 } // namespace Input
 100 } // namespace Msp