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2dtobtnFilter.H

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#ifndef GLUE_2DTOBTNFILTER_H
#define GLUE_2DTOBTNFILTER_H

#define OUTSIDE_GLUE_CORE

#include "event/event.H"
#include "dev/dev.H"
#include "dev/dev2d.H"
#include "dev/buttons.H"
#include "mlib/points.H"
#include <math.h>
#include "config/config.H"

//#define M_PI 3.14159265358
class twodtobtnFilter:public EVENTfilter
{
protected:
  str_ptr _name;
  str_ptr _btnleft;
  str_ptr _btnright;
  str_ptr _btnup;
  str_ptr _btndown;
  str_ptr _btncenter;
  str_ptr _dev2d;
  double _distance;
  int _prevState;
public:
  twodtobtnFilter(str_ptr name):_name(name){
    _btnleft=CONFIGval(_name+str_ptr("_left"),"left",true);
    _btnright=CONFIGval(_name+str_ptr("_right"),"right",true);
    _btnup=CONFIGval(_name+str_ptr("_up"),"up",true);
    _btndown=CONFIGval(_name+str_ptr("_down"),"down",true);
    _btncenter=CONFIGval(_name+str_ptr("_center"),"center",true);

    _dev2d=CONFIGval(_name+str_ptr("_2d"),"",true);

    _distance=CONFIGval(_name+str_ptr("_distance"),0.5,false);
    _prevState=-1;
  }
  
  EVENTptr filter(cEVENTptr &evt){
    //cout << "have an event\n";
    //cout.flush();
    if (EVENT2d::isa(evt)){
      //cout << "it's a 2d event\n";
      //cout.flush();
      EVENT2dptr e2d=EVENT2d::cast(evt);
      if (e2d){
    if (e2d->source()->evt_name()==_dev2d){
      //cout << "it's our event\n";
      //cout.flush();
      //find out the current position
      XYpt cur=e2d->cur();
      int new_state;
      if (hypot(cur[0],cur[1])>_distance){
        //see what quadrant its in by doing atan2
        double angle=atan2(cur[1],cur[0]);
        if (angle>=-3*M_PI/4.0 && angle<=-M_PI/4.0){
          new_state=1;
        }else if (angle>-M_PI/4.0 && angle<=M_PI/4.0){
          new_state=2;
        }else if (angle >M_PI/4.0 && angle<=3*M_PI/4.0){
          new_state=3;
        }else{
          new_state=4;
        }
      }else{
        new_state=0;
      }
      
      //now sort out what to do
      if (new_state!=_prevState){
        //send out up event for old button
        switch(_prevState){
        case(0):
          EVENTmgr::distrib(new EVENTbtn(_btncenter,false));
          break;
        case(1):
          EVENTmgr::distrib(new EVENTbtn(_btndown,false));
          break;
        case(2):
          EVENTmgr::distrib(new EVENTbtn(_btnright,false));
          break;
        case(3):
          EVENTmgr::distrib(new EVENTbtn(_btnup,false));
          break;
        case(4):
          EVENTmgr::distrib(new EVENTbtn(_btnleft,false));
          break;
        }
        
        //send out new event
        _prevState=new_state;
        switch(_prevState){
        case(0):
          return new EVENTbtn(_btncenter,true);
          break;
        case(1):
          return new EVENTbtn(_btndown,true);
          break;
        case(2):
          return new EVENTbtn(_btnright,true);
          break;
        case(3):
          return new EVENTbtn(_btnup,true);
          break;
        case(4):
          return new EVENTbtn(_btnleft,true);
          break;
        }
      }
      
    }else{
      //we do nothing since no change in buttons
    }
    
      }else {
    //cout << "not our 2d\n";
    return evt;
      }
    }
    //cout << "not a 2d\n";
    return evt;  
  }
};
          
      
#endif

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