/**
 *
 *  SWITCH.cpp
 *  Jan Dvorak z Vozerovic - dvorkaman@centrum.cz - dvorkaman.php5.cz
 */   
 
#ifndef switch_cpp
#define switch_cpp

#include "WProgram.h"
#include "switch.h"

/***************************************************
/**
 * Constructor
 * @param int input pin; minimal press time = 10ms 
 */
 Switch::Switch(int pin)
 {
    inputPin=pin;
    minTime=10;
    
    init();
 }

/***************************************************
/**
 * Constructor
 * @param {int,int} input pin, minimal switch press time [ms] 
 */
 Switch::Switch(int pin,int minPressTime)
 {
    inputPin=pin;
    
    if(minPressTime>=0)minTime=minPressTime;
    
    init();
 }
 
/***************************************************
/**
 * Inicialize input pin, implicit values
 * PRIVATE 
 */
 inline void Switch::init()
 {
    pinMode(inputPin,INPUT);

    pressed1=false;
    pressed2=false;

    pressTime=-1; //not pressed yet
    firstPress=false;
 }

/***************************************************
/**
 * All necessery calculations
 * PRIVATE 
 */
 void Switch::makeCalculations()
 {
    state=digitalRead(inputPin);
    
    //button is pressed
    if( state==1 )
    {
      //was button pressed before??
      if( firstPress==false )
      {
        pressTime=millis(); //actual system time      
        firstPress=true;
      }

      //evaluation of pressing             
      if( pressed1==false ) //NOT ELSE PART, becouse minTime can be to small
      {
        long m=millis();
        if( (m-pressTime)>=minTime )
        {
          //button pressed for minimal amount of time
          pressed1=true;
          pressed2=true; //first cycle of momentary switch => ON 
        }        
      
      }else if( pressed2==true )pressed2=false; //pressed1=true; => 2.+ cycle => momentary switch OFF                                                          
      
    //switch is OFF => clear registers
    }else{
      //clear if neccessery
      if( pressed1==true )
      {
        pressTime=-1; //
        pressed1=false;
        pressed2=false;
        firstPress=false;      
      }
      
    }
    
 }

/***************************************************
/**
 * Switch as momentary one
 * @returns boolean is momentary pressed - true for one processor cycle 
 */
 boolean Switch::isMomentaryPressed()
 {
    makeCalculations();
    return pressed2;
 }

/***************************************************
/**
 * Switch as ordinary one
 * @returns boolean is pressed - true while pressed 
 */
 boolean Switch::isPressed()
 {
    makeCalculations();
    return pressed1;
 }
 
#endif