Adding test pinch-zoom functionality for range plots

from kivy.uix.button import Button

from kivy.uix.togglebutton import ToggleButton

from kivy.uix.gridlayout import GridLayout

from kivy.uix.image import AsyncImage

from kivy.uix.image import Image

from kivy.uix.slider import Slider

from kivy.clock import Clock

from kivy.uix.pagelayout import PageLayout

from kivy.graphics.instructions import Callback

from kivy.uix.screenmanager import ScreenManager, Screen, FadeTransition, SlideTransition

from kivy.uix.scrollview import ScrollView

from kivy.uix.scatter import Scatter

#import RPi.GPIO as GPIO

from kivy.lang.builder import Builder

from souptest import statusdetect

import requests

from bs4 import BeautifulSoup,SoupStrainer

from bs4 import BeautifulSoup

from tables import * 

import datetime

import os

        layout.add_widget(hisScroll)

        button2 =MainButton(text='Main Menu',id='main')

        hisScroll.add_widget(button2)

        t2 = threading.Thread(target=historyUpdate,args=(HistoryScreen,),daemon=True)

        t2.start()

#        

#        t2 = threading.Thread(target=historyUpdate,args=(HistoryScreen,),daemon=True)

#        t2.start()

#    

class DetGrid(GridLayout):

    def __init__(self,**kwargs):

	pass

def historyUpdate(obj):

    if os.path.basename(os.getcwd()) != "event_data":

        try:

            os.chdir("./event_data")

        except:

                i+=1

            j+=1

        time.sleep(30)

        time.sleep(30)#

def plotupdate(obj):

    while True:

        if os.path.basename(os.getcwd()) != 'event_data':

            try:

                os.chdir("./event_data")

            except:

                os.mkdir("./event_data")

                os.chdir("./event_data")

        #formulate the url to get today's

        date = datetime.datetime.today()

        sort_date = [str(date.year),str(date.month).zfill(2),str(date.day).zfill(2)]

        datestring = sort_date[0]+sort_date[1]+sort_date[2]

        url = "https://www.gw-openscience.org/detector_status/day/"+datestring+"/"

        #grab the soup and pzrse for links + descripts

        resp=requests.get(url)

        r = resp.text

        soup=BeautifulSoup(r,"lxml")

        sources=[]

        descripts=[]

        for link in soup.find_all("a"):

            linkstr = str(link.get("href"))

            if 'png' in linkstr:

                sources.append('https://www.gw-openscience.org'+linkstr)

                descripts.append(str(link.get("title")))

        filepaths =[]

        for i in range(0,len(sources)):

            filepaths.append('Detector_Plot_'+str(i)+'.png')

        j=0

        for source in sources:

            os.system("curl -0 "+ source + ' > ' + filepaths[j])

            j+=1

        time.sleep(3600)

class StatusScreen(Screen):

    def __init__(self,**kwargs):

        super().__init__(**kwargs)

    def __init__(self,**kwargs):

        super().__init__(**kwargs)

        layout=GridLayout(rows=2)

        layout2=GridLayout(rows=2)

        self.add_widget(layout)

        layout.add_widget(layout2)

        date = datetime.datetime.today()

        sort_date = [str(date.year),str(date.month).zfill(2),str(date.day).zfill(2)]

        datestring = sort_date[0]+sort_date[1]+sort_date[2]

        url = "https://www.gw-openscience.org/detector_status/day/"+datestring+"/"

        plot_handle = Scatter(do_rotation=False,do_translation=False,scale_min=3,scale_max=10)

        current_plot = Image(size=(800,600),source='./event_data/Detector_Plot_0.png')

        current_desc = Label(text='Nothing yet...')

        resp=requests.get(url)

        r = resp.text

        soup=BeautifulSoup(r,"lxml")

        layout2.add_widget(plot_handle)

        plot_handle.add_widget(current_plot)

        layout2.add_widget(current_desc)

        t3 = threading.Thread(target=plotupdate,args=(layout,),daemon=True)

        t3.start()

        sources=[]

        descripts=[]

        for link in soup.find_all("a"):

            linkstr = str(link.get("href"))

            if 'png' in linkstr:

                sources.append(linkstr)

                descripts.append(str(link.get("title")))

        wimg=AsyncImage(source=sources[0])

        button4 = MainButton(text='Main Menu',id='main')

        button4 = MainButton(text='Main Menu',id='main',size_hint_y=None,height=25)

        layout.add_widget(button4)

        layout.add_widget(wimg)

sm = ScreenManager()

sm.add_widget(MainScreen(name='main'))