#!/usr/bin/env python2.7  
  
import time
import RPi.GPIO as GPIO  
from time import sleep     # this lets us have a time delay (see line 12)  
  
GPIO.setmode(GPIO.BCM)     # set up BCM GPIO numbering  
#GPIO.setup(20, GPIO.IN)    # set GPIO25 as input (button)  
#GPIO.setup(20, GPIO.IN, pull_up_down = GPIO.PUD_UP)

class Button:
   	'Handle button stuff'
	starttime=0
	ispushed=0
	waspushed=0
	presstime=0
	ignore=0

	def __init__(self, gpio):
		print "initialize button on gpio %d"%gpio
		self.gpio = gpio
		GPIO.setup(self.gpio, GPIO.IN, pull_up_down = GPIO.PUD_UP)
		GPIO.add_event_detect(self.gpio, GPIO.BOTH, callback=self.my_callback)  
		self.presstime=0
		self.starttime=0
		self.presstime=0
		self.waslong=0
	
	def my_callback(self,channel):  
    		if not GPIO.input(channel):     # button is pressed
#       			print "[press] on %d"%self.gpio
			self.starttime=time.time()
			self.ispushed=1
    		else:          			# button released
			self.presstime=time.time()-self.starttime
#			print "[release] on %d  /  <pressed> for=%f sconds"%(self.gpio,self.presstime)
			if self.ispushed:
				self.waspushed=1
				self.ispushed=0

	def WasPressed(self):
		if self.waspushed:
			self.waspushed=0
			return 1
    		elif self.ispushed:
			self.presstime=time.time()-self.starttime
			if self.presstime > 2:
				self.ispushed=0
				self.waspushed=1
				self.waslong=1
			
		else:
			return 0

	def WasLong(self):
		if self.presstime > 2:
			self.waslong=0
			self.ignore=1
			return 1
		else:
			return 0