Accessing element of kivy from another class

[SANDEEP KUSHWAHA]

Hi All,
I have defined two class say A and B.A is defined above B.I want to access member of B from A,which i am not able to as it is raising error stating not defined.Any help will be haighly appreciated!!!

[Oon-Ee Ng]

Some example code would help here, it is not clear what 'member'
you're referring to. A function? A class function? An attribute?

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[SANDEEP KUSHWAHA]

Actually i want to update the label defined in class B from class A.I am trying to bind,but it's not happening

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[ZenCODE]

As Oon-Ee Ng says, post some runnable code and we can try help :-) There are many, many ways to do this. The best way depends on how you have structured you app.

[SANDEEP KUSHWAHA]

class BrowseFile(Popup):


    def __init__(self,**kwargs):
        super(BrowseFile,self).__init__(**kwargs)
        ok_b = self.ids.ok_btn
        ok_b.bind(on_press = self.update_driver_path)

    def update_driver_path(self,evt=None):
        print "driver path inside display port :",driver_path
        self.dismiss()
        upd = return_uploaddriver()
        print "type of upd",type(upd)
#       upd.ids.driver_id.text = driver_path

        upd.ids.driver_id.bind(text=self.update_label)
      #  self.update_label()   
        print "update driver path :",upd.ids.driver_id.text

    def update_label(self,instance,value):
        print "inside update_label\n"
      #  upd = return_uploaddriver()
       # upd.ids.driver_id.text = driver_path
        print "update driver path :",upd.ids.driver_id.text

and one class :UploadDriver

class UploadDriver(BoxLayout):
    driver_path_label = StringProperty('')
    mypopup1 = BrowseFile()

    def __init__(self,**kwargs):
        super(UploadDriver,self).__init__(**kwargs)
    #global popup1
    global thrd_lb
    global t1,t2
    global report_flag
    folder_selected = StringProperty()
    portpopup = PortPop()
    threadpop = ThreadPopup()

kv file:

<UploadDriver>:

    id: uploadId

    BoxLayout:
        orientation:'vertical'
        spacing: 20
        padding: 10
        pos_hint: {'x':0.5 ,'y': 0.1}
        size_hint: 0.7,0.7

        BoxLayout:
            orientation: 'horizontal'
            spacing: 60
            pos_hint: {'x':0 ,'y': 0.2}

            Label:
                text: 'Upload driver path'
                color: .4,.6,.1,.8
                id: driver_id
                size_hint: 0.1, None
                height: 50
                text_size: None, None
                canvas.before:
                    Color:
                        rgba: .3, .3, .3, .3
                    Rectangle:
                        size: self.size
                        pos: self.pos

            Button:
                text: 'Browse'
                size_hint: None, None
                height: 50
                width: 100
                on_press: root.select_port()

<BrowseFile>:


    BoxLayout:
        orientation: 'vertical'
        FileChooserListView:
            id: filechooser
            on_selection: root.selected_file(filechooser.selection)
            dirselect: True
        Label:
            id: text_input
            text:'you clicked on :'

        BoxLayout:
            orientation: 'horizontal'

            Button:
                id: ok_btn
                text: 'OK'
                size_hint: None, None
                height: 30
                width: 70
                pos_hint: {'x':0 ,'y': .5}
            #  on_press: root.port_open()

I am trying to update label in class UploadDriver from Class BrowseFile.

On Fri, Feb 12, 2016 at 2:49 AM, ZenCODE <zenkey....@gmail.com> wrote:

As Oon-Ee Ng says, post some runnable code and we can try help :-) There are many, many ways to do this. The best way depends on how you have structured you app.

--

[ZenCODE]

Unfortunately, you have just given the code for these 2 classes. It does not tell us how they are related or give any indication of the structure of your app. And this is what's important when linking them.

So, without a runnable example, we can only guess. I'll guess that UploadDriver is a class that creates a BrowseFile class? Then you might want to pass a reference into your UploadDriver class instance.

So, add this to you BrowseFile class.

    class BrowseFile(Popup):

        upload_driver = ObjectProperty()

Then, when you instantiate it from the UploadDriver instance, you go

    browse_file = BrowseFile(upload_driver=self, ......)

Then, inside BrowseFile, you can access the UploadDriver instance as

    self.upload_driver.my_propery = my_value

Or such like. It depends on you program flow and how and where you instantiate your BrowseFile class. The best solution is only clear given the exact context.

Good luck.

[SANDEEP KUSHWAHA]

Thank you very much for your constant help.I am new to kivy...and really appreciate your help.
My problem is that....basically I want to bind text property of label defind in Upload driver class through Browse file class...but this binding is not happening.I have defined a callback function inside bind method.I currently don't have the code segment but will surely send once I get it.

--

[SANDEEP KUSHWAHA]

please look into the code segment below:

I have tried all possible means to update label on click of a button that is included in a popup with filechooser.Also i have define two below class in kivy.Kivy code i have sent you earlier.Hope u can help me out of this!!!

Some lines are commented,that are indication to  ways i have tried to achieve this.

class BrowseFile(Popup):

        

    UploadDriver = ObjectProperty()

    def __init__(self,**kwargs):

        super(BrowseFile,self).__init__(**kwargs)

        ok_b = self.ids.ok_btn

        ok_b.bind(on_press=self.UploadDriver.update_label)        

    def update_driver_path(self,instance):

        self.dismiss()

        upd = return_uploaddriver()

        print "type of upd",type(upd)

        upd.update_label()

# upd.ids.driver_id.bind(text=self.ids.input_text('text')

        print "update driver path :",upd.ids.driver_id.text

 #   def update_label(self,instance):

  #      print "inside update_label\n"

      #  upd.ids.driver_id.text = driver_path

   #     print "update driver path :",upd.ids.driver_id.text

 

    def selected_file(self, filename):

        global browse_flag

        global store_path

        global driver_path

        if browse_flag == 0:

            driver_path = filename[0]

            self.ids.text_input.text = driver_path

        elif browse_flag == 1:

            

            store_path = filename[0]

            self.ids.text_input.text = store_path

            browse_flag = 0

            

The other class UploadDriver look like this:

class UploadDriver(BoxLayout):

    driver_path_label = StringProperty('')

    mypopup1 = BrowseFile()

    

    def __init__(self,**kwargs):

        browse_file = BrowseFile(UploadDriver=self)

        super(UploadDriver,self).__init__(**kwargs)

    #global popup1 

    global thrd_lb  

    global t1,t2 

    global report_flag

    folder_selected = StringProperty()

    portpopup = PortPop()

    threadpop = ThreadPopup()

    

    def update_label(self):

        self.ids.driver_id.text = driver_path

        print "driver path....."    , self.ids.driver_id.text

    def add_to_label(self,store_path1):

        global store_path

        print "inside add_to_label"

 

        self.mypopup1.dismiss()

        self.ids.upload_port.text = store_path

      

[Oon-Ee Ng]

As ZenCode has explained, your code is not sufficient. You are showing
two classes but you're not showing how/where they're being used in
your app.

As an analogy, if you asked me how to get from the bedroom to the
kitchen, I'd only be able to answer that if I knew the map of your
house. You're showing us how the bedroom and kitchen look, but we have
no idea what the house is like.

On Wed, Feb 17, 2016 at 2:56 PM, SANDEEP KUSHWAHA

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[SANDEEP KUSHWAHA]

i am posting the entire code now:

import kivy

kivy.require('1.1.3')

import random

import shlex, subprocess

import thread

import time

import os,sys, glob

import signal

import threading

import multiprocessing

import webbrowser

from multiprocessing import Process,Lock, Condition

from kivy.app import App

from kivy.clock import Clock

from threading import Thread

from kivy.metrics import Metrics

from kivy.properties import NumericProperty

from kivy.properties import StringProperty

from kivy.uix.anchorlayout import AnchorLayout

from kivy.uix.boxlayout import BoxLayout

from kivy.uix.button import Button

from kivy.uix.floatlayout import FloatLayout

from kivy.uix.label import Label

from kivy.uix.popup import Popup

from kivy.uix.scatter import Scatter

from kivy.uix.treeview import TreeView, TreeViewLabel

from kivy.uix.widget import Widget

from kivy.uix.dropdown import DropDown

from kivy.base import runTouchApp

from kivy.uix.screenmanager import ScreenManager, Screen

from kivy.lang import Builder

from kivy.uix.progressbar import ProgressBar

from kivy.properties import ObjectProperty

from kivy.core.text import Label

from functools import partial

Builder.load_file('homepage.kv')

Builder.load_file('porting.kv')

Builder.load_file('uploaddriver.kv')

Builder.load_file('customdb.kv')

Builder.load_file('popup.kv')

driver_path = StringProperty('')

store_path = ""

source_ver_path = ""

dest_ver_path = ""

select_os1 = ""

select_os2 = ""

select_ver1 = ""

select_ver2 = ""

dmt_pid = 0

browse_flag = 0

source_kernel_path = ''

dest_kernel_path = ''

#thrd_lb = " Auto Porting Unsuccessfull.. Please try Again "

thrd_lb = " Create custom DB Unsuccessfull... Please Try Again.. "

popup1 = Popup()

popup2 = Popup()

report_flag = 0

class Showcase(FloatLayout):

    pass

class SourceKernel(Popup):

    source_kernel_label = ""

    def selected_path(self,source_path):

        global source_kernel_path

        source_kernel_path = source_path[0]

    def dismiss_popup(self):

        self.dismiss()

        #self.clear_widgets()

        #self.add_widget(HomePage())

    def call_cancel(self):

        global source_kernel_path

        source_kernel_path = ""

        self.dismiss()

class DestinationKernel(Popup):

    source_kernel_label = ""

    def selected_dest_path(self,source_path):

        global dest_kernel_path

        dest_kernel_path = source_path[0]

    def dismiss_popup(self):

        self.dismiss()

        #self.clear_widgets()

        #self.add_widget(HomePage())

    def call_cancel(self):

        global dest_kernel_path

        dest_kernel_path = ""

        self.dismiss()

class BrowseFile(Popup):

        

    UploadDriver = ObjectProperty()

    def __init__(self,**kwargs):

        super(BrowseFile,self).__init__(**kwargs)

        ok_b = self.ids.ok_btn

        ok_b.bind(on_press=self.UploadDriver.update_label)        

    def update_driver_path(self,instance):

        self.dismiss()

        upd = return_uploaddriver()

        print "type of upd",type(upd)

        upd.update_label()

        print "update driver path :",upd.ids.driver_id.text

 #   def update_label(self,instance):

  #      print "inside update_label\n"

      #  upd.ids.driver_id.text = driver_path

   #     print "update driver path :",upd.ids.driver_id.text

 

    def selected_file(self, filename):

        global browse_flag

        global store_path

        global driver_path

        if browse_flag == 0:

            driver_path = filename[0]

            self.ids.text_input.text = driver_path

        elif browse_flag == 1:

            

            store_path = filename[0]

            self.ids.text_input.text = store_path

            browse_flag = 0

    def cancel_port(self):

driver_path = ''

self.dismiss()

 

    def selected_file2(self, filename):

        global store_path

        print "inside selected file2..............."

        global popup2

        #upload_label = UploadDriver.ids.upload_port

        store_path = filename[0]

print "store path: ",store_path

        #popup = Popup(title = 'uplaod label', content=Label(text = self.upload_label), size_hint = (0.5,0.5))

        #popup.open()

        self.ids.text_input.text = store_path

        #popup = Popup(title = 'uplaod label', content=Label(text = driver_path+" ---"+ store_path +" ---"+ source_ver_path +" ---"+ dest_ver_path +" ---"), size_hint = (0.5,0.5))

        #popup.open() 

    def port_open(self):

        global browse_flag

        print "inside port open..........";

        self.ids.text_input.text = "Selected file"

        browse_flag = 1

        #fc = self.ids.filechooser

       # fc.bind(on_selection =lambda widget:  self.selected_file2(fc.selection))

      #  self.ids.ok_btn.bind(on_press = lambda widget: self.update_driver_path)

        self.ids.cancel_btn.bind(on_press = lambda widget: self.cancel_port2())

        self.open()

    def display_label(self):

        print "inside dispaly label............"

        global store_path

        #upload_label = UploadDriver.ids.upload_port

        #store_path = filename[0]

       # popup = Popup(title = 'data passed', content=Label(text = store_path), size_hint = (0.5,0.5))

       # popup.open()

        #self.ids.text_input.text = store_path

        upload_obj.add_to_label(store_path)

        self.dismiss()

    def cancel_port2(self):

        store_path = ''

print "store path :",store_path

        self.dismiss()

class CustomPopup(Popup):

    pass

    

class PortPop(Popup):

    def terminate_call(self):

       

self.dismiss()

proc = subprocess.Popen("ps | grep perl", stdout=subprocess.PIPE, shell=True)

(out, err) = proc.communicate()

#print "program output:", out

        s_pid = shlex.split(out)

dmt_pid = s_pid[0]

print "PID_term_bfre:", dmt_pid

os.kill(int(dmt_pid),signal.SIGTERM)

print "PID_term:", dmt_pid

        

    

   # def terminate_customdb(self):

       

# self.dismiss()

# proc = subprocess.Popen("ps | grep  perl ", stdout=subprocess.PIPE, shell=True)

# (out, err) = proc.communicate()

# print "program output:", out

 #       s_pid = shlex.split(out)

# dmt_pid = s_pid[0]

# print "PID_term_bfre:", dmt_pid

# os.kill(int(dmt_pid),signal.SIGTERM)

# print "PID_term:", dmt_pid

    def custom_open(self):

        self.open()

     #   self.ids.cancel_id.bind(on_press = lambda widget: self.terminate_call())

class ThreadPopup(Popup):

    

    global thrd_lb

    global report_flag

    def myopen(self):

        #self.ids.text_input.text = thrd_lb

        #print self.ids.text_input.text

        self.ids.cancel_id.bind(on_press = lambda widget: self.on_call())

        self.open()

 

    def on_call(self):

        print "on_call is called"

        self.dismiss()

        print "on_call had dismissed"

        report_flag = 1

        print "report flag",report_flag

    def on_success(self):

        self.dismiss()

        print "I am in on_success"

        go_to_viewpage()

    def open_ported_driver_folder(self):

        global store_path

        folder_path = "file://"+store_path+"/"

        webbrowser.open(folder_path)

class ThreadPopup2(Popup):

    global thrd_lb

    def finish_open(self):

        self.ids.text_input.text = thrd_lb

        print self.ids.text_input.text

        self.ids.ok_btn.bind(on_press = lambda widget: self.on_ok)

        self.open()

    def on_ok(self):

        self.dismiss()

    

    

class ViewPage(BoxLayout):

    def back(self):

        self.clear_widgets()

        self.add_widget(UploadDriver())

class UploadDriver(BoxLayout):

    driver_path_label = StringProperty('')

    mypopup1 = BrowseFile()

    

    def __init__(self,**kwargs):

        browse_file = BrowseFile(UploadDriver=self)

        super(UploadDriver,self).__init__(**kwargs)

    #global popup1 

    global thrd_lb  

    global t1,t2 

    global report_flag

    folder_selected = StringProperty()

    portpopup = PortPop()

    threadpop = ThreadPopup()

    

    def update_label(self):

        self.ids.driver_id.text = driver_path

        print "driver path....."    , self.ids.driver_id.text

    def add_to_label(self,store_path1):

        global store_path

        print "inside add_to_label"

 

        self.mypopup1.dismiss()

        self.ids.upload_port.text = store_path

      

        

    def select_port(self):

        self.mypopup1.title = "Select Driver to port"

self.mypopup1.size_hint = (0.5,0.9)

self.mypopup1.open(UploadDriver())

    def select_port2(self):

self.mypopup1.title = "Select Driver to port"

self.mypopup1.size_hint = (0.5,0.9)

        self.mypopup1.port_open()

      

    def select_port3(self):

        content = BoxLayout(orientation = 'vertical')

        content.add_widget(BrowseFile3())

        popup = Popup(title = 'Select driver to port', content = content, size_hint = (0.5,1))

        popup.open()

    def select_port4(self):

        content = BoxLayout(orientation = 'vertical')

        content.add_widget(BrowseFile4())

        popup = Popup(title = 'Select driver to port', content = content, size_hint = (0.5,1))

        popup.open()

 

      

    def back_home(self):

        global driver_path

        global store_path

        global select_ver1

        global select_ver2

        global select_os1

        global select_os2

        driver_path = ''

        store_path = '' 

        select_ver1 = ''

        select_ver2 = ''

        select_os1 = ''

        select_os2 = ''

        self.clear_widgets()

        self.add_widget(HomePage())

    def back_upload(self):

        global driver_path

        global store_path

        print"driverpath",driver_path

        driver_path = ''

        store_path = ''

        self.clear_widgets()

        

        self.add_widget(UploadDriver())

        print"driverpath",driver_path

        print"store path",store_path

    

    def progress_func(self):

        self.clear_widgets()

        self.add_widget(Progress()) 

    def scriptCall(self):

        global dmt_pid

        global flag

       

 

        

        t2 = threading.Thread(target =  self.popup_call)

        t2.start()

        self.clear_widgets()

        self.add_widget(HomePage())

   

    def command_call(self):

        

        time.sleep(5)

        

        command = "perl DMT.pl"+" " +driver_path+"/ "+select_ver1+" "+select_ver2+" "+"/home/aricent/LinuxKernel/"+select_ver1+"/ " +" /home/aricent/LinuxKernel/"+select_ver2+"/ " +" 1"

print "command name -", command

        args = shlex.split(command)

        pipe = subprocess.Popen(args,stdout = subprocess.PIPE)

        print "PID:", pipe.pid

        

        exit_status = pipe.wait()

        print "exit status",exit_status

        

         

        self.threadpop.title = "Report"

        self.threadpop.size_hint = (0.4,0.4)

   

        if exit_status == 0:

            print "I am inside if"

            self.portpopup.dismiss()

            self.threadpop.open()

        else: 

            print "i am in else"

            self.portpopup.dismiss()

            self.threadpop.title = "----ERROR---- "

            self.threadpop.size_hint = (0.5,0.5)

            thrd_lb = " Auto Porting Unsuccessfull.. Please try Again "

            self.threadpop.open() 

            

    def popup_call(self):

        print "calling pop up"

        content = BoxLayout(orientation = 'vertical')

        content.add_widget(PortPop())        

        self.portpopup.title = 'Automatic Porting in Progress...Please Wait...'

        self.portpopup.size_hint = (0.5,0.45)

        self.portpopup.auto_dismiss = 'False'

        self.portpopup.open()

        t1 = threading.Thread(target = self.command_call)

        t1.start()

                     

        

def return_uploaddriver():

    up_driver = UploadDriver()

    return(up_driver)

#upload_obj = UploadDriver()

vp = ViewPage()

def go_to_viewpage():

    global t1

    print "I am in go_to_viewpage"

    upload_obj1 = UploadDriver()

    content = BoxLayout(orientation='vertical')

    content.add_widget(ViewPage())

class CustomDb(BoxLayout):

#    global mypopup

    portpopup = PortPop()

    threadpopup = ThreadPopup2()

    def select_source_kernel(self):

        

        mypopup = SourceKernel()

        mycontent = BoxLayout(orientation = 'vertical')

        mycontent.add_widget(SourceKernel())

        mypopup.title ="select source kernel"

        mypopup.size_hint = (0.5,0.5)

        mypopup.open()

    def select_dest_kernel(self):

        mypopup = DestinationKernel()

        mycontent = BoxLayout(orientation = 'vertical')

        mycontent.add_widget(DestinationKernel())

        mypopup.title ="select Destination kernel"

        mypopup.size_hint = (0.5,0.5)

        mypopup.open()

    def back_home(self):

        self.clear_widgets()

        self.add_widget(HomePage())

    

    def reset_custom(self):

        self.clear_widgets()

        self.add_widget(CustomDb())

        

    def continue_customdb(self):

        global dmt_pid

        global flag

       

 

        

        t3 = threading.Thread(target =  self.customdb_popup)

        t3.start()

        self.clear_widgets()

        self.add_widget(HomePage())

   

    def create_customdb(self):

        

        time.sleep(5)

        

        command = "perl CreateDBonly1.pl /home/dmt/LinuxKernel/linux-3.10.65/ /home/dmt/LinuxKernel/linux-3.18.3/"

print "command name -", command

        args = shlex.split(command)

        pipe = subprocess.Popen(args,stdout = subprocess.PIPE)

        print "PID:", pipe.pid

        

        exit_status = pipe.wait()

        print "exit status",exit_status

        

         

   

        if exit_status == 0:

            self.threadpop.title = "Finished"

            self.threadpop.size_hint = (0.4,0.4)

            print "I am inside if"

            self.portpopup.dismiss()

            self.threadpop.open()

        else: 

            print "i am in else"

            self.portpopup.dismiss()

            self.threadpopup.title = "----ERROR---- "

            self.threadpopup.size_hint = (0.5,0.5)

            thrd_lb = " CustomDb Creation Unsuccessfull.. Please try Again "

            self.threadpopup.finish_open() 

           # popup = Popup(title = 'customdb creation unsuccessfull...please try again', size_hint = (0.6,0.6))

           # popup.open()

            

    def customdb_popup(self):

        print "calling pop up"

        content = BoxLayout(orientation = 'vertical')

        content.add_widget(PortPop())        

        self.portpopup.title = 'Creating Custom Database...can take several hours'

        self.portpopup.size_hint = (0.5,0.45)

        self.portpopup.auto_dismiss = 'False'

        self.portpopup.custom_open()

        t4 = threading.Thread(target = self.create_customdb)

        t4.start()

class HomePage(BoxLayout):

    value = NumericProperty(0)

   

    def __init__(self, **kwargs):

        super(HomePage, self).__init__(**kwargs)

        Clock.schedule_interval(self.increment_value, 1 / 30.)

    dir_name = []

        dir = glob.glob('../Database/linux-*')

 

        for dn in dir:

            split_dn = dn.split("/")

            dir_name.append(split_dn[-1])

        dir_name.sort()

        dir_name.append('Custom')

        dropdown_os1 = DropDown()

        dropdown_os2 = DropDown()

        dropdown_ver1 = DropDown()

        dropdown_ver2 = DropDown()

        os = ['Linux' , 'Windows', 'Mac']

        for req_os in os:    

            btn = Button(text =  req_os, size_hint_y= None, height = 44,  background_color= (0.3,0.82,0.9,0.46))

            btn.bind(on_release = lambda btn: dropdown_os1.select(btn.text))

            dropdown_os1.add_widget(btn)

        mainbutton = self.ids.os_source

        mainbutton.bind(on_release = dropdown_os1.open)

        dropdown_os1.bind(on_select=self.on_select_os1)

        for req_os in os:           

            btn_1 = Button(text =  req_os, size_hint_y= None, height = 44,  background_color= (0.3,0.82,0.9,0.46))

            btn_1.bind(on_release = lambda btn_1: dropdown_os2.select(btn_1.text))

            dropdown_os2.add_widget(btn_1)

        mainbutton1 = self.ids.os_dest

        mainbutton1.bind(on_release = dropdown_os2.open)

        dropdown_os2.bind(on_select=self.on_select_os2)

   

        for ver in dir_name:    

            btn_v = Button(text = ver, size_hint_y= None, height = 44 , background_color= (0.3,0.82,0.9,0.46))

            btn_v.bind(on_release = lambda btn_v: dropdown_ver1.select(btn_v.text))

            dropdown_ver1.add_widget(btn_v)

        for ver in dir_name:      

            btn_v1 = Button(text = ver, size_hint_y= None, height = 44 , background_color= (0.3,0.82,0.9,0.46))

            btn_v1.bind(on_release = lambda btn_v1: dropdown_ver2.select(btn_v1.text))

            dropdown_ver2.add_widget(btn_v1)

        mainbutton_v = self.ids.ver_source

        mainbutton_v.bind(on_release = dropdown_ver1.open)

        mainbutton_v1 = self.ids.ver_dest

        mainbutton_v1.bind(on_release = dropdown_ver2.open)

        dropdown_ver1.bind(on_select = self.on_select_ver1)

        dropdown_ver2.bind(on_select = self.on_select_ver2)

        

    

    def on_select_os1(self, *args):

        self.text = args[1]

        setattr(self.ids.os_source, 'text', self.text)

        global select_os1

        select_os1 = self.text

    def on_select_os2(self, *args):

        self.text = args[1]

        setattr(self.ids.os_dest, 'text', self.text)

        global select_os2

        select_os2 = self.text

    def on_select_ver1(self, *args):

        self.text = args[1]

        setattr(self.ids.ver_source, 'text', self.text)

        global select_ver1

        select_ver1 = self.text

    def on_select_ver2(self, *args):

        self.text = args[1]

        setattr(self.ids.ver_dest, 'text', self.text)

        global select_ver2

        select_ver2 = self.text

    def increment_value(self, dt):

        self.value += dt

    def show_upload(self, instance):

        self.clear_widgets()

    def UploadDriver_func(self):

      #  content = BoxLayout(orientation = 'vertical')

        #content.add_widget(Label(text = "Do you want to generate custom database?"))

        content1 = BoxLayout(orientation = 'horizontal', spacing = 10)

      #  if(select_ver1 != '' and select_ver2 != '' and select_ver1 == select_ver2):

       #     flag = 1 

        content2 = AnchorLayout(anchor_x='center', anchor_y='center')

        if((select_ver1 == '' or select_ver2 == '' or select_ver1 == select_ver2) and (select_ver1 != 'Custom' or select_ver2 != 'Custom')):

            

            flag = 1

        elif(select_ver1 == 'Custom' or select_ver2 == 'Custom'):

            flag = 2

            #self.custPop.open()

        else:

            flag = 0

            self.clear_widgets()

            self.add_widget(UploadDriver())

        if flag == 1:

            if((select_ver1 != '' or  select_ver2 != '') and (select_ver1 == select_ver2) and (select_ver1 != 'Custom')):

                popup = Popup(title = 'Source and Destination kernel can\'t be same', content= content2 , size_hint = (0.4,0.3))

            else:

                popup = Popup(title = 'Please Select Both Kernel versions', content= content2 , size_hint = (0.4,0.3))

            

            content2.add_widget(Button(text = " OK ", size_hint = (0.4, 0.4),pos_hint = {'x' : 0.5, 'y' : 0.2},on_press = popup.dismiss))

            popup.open()

        elif flag == 2:

            popup = Popup(title = 'Do you want to generate custom database?', content= content1 , size_hint = (0.4,0.3))

            mybutton = Button(text = "Yes",id = 'yes_btn', size_hint = (0.3,0.4), pos_hint = {'x' : 0.5, 'y' : 0.2},on_press = lambda widget:self.call_customdb(popup))

            content1.add_widget(mybutton)

            content1.add_widget(Button(text = " No ", size_hint = (0.3, 0.4),pos_hint = {'x' : 0.5, 'y' : 0.2},on_press = popup.dismiss))

            

            popup.open()

         #   content.add_widget(content2)

    def myfunc(self,p):

        p.dismiss()

        self.clear_widgets()

        self.add_widget(ViewPage())

    def call_customdb(self,p):

        p.dismiss()

        self.clear_widgets()

        self.add_widget(CustomDb())

class ShowcaseApp(App):

    title = 'Driver Migration Tool'

    def build(self):

        root = BoxLayout(orientation='horizontal', padding=20, spacing=20)

        self.content = content = BoxLayout()

        root.add_widget(content)

        sc = Showcase()

        sc.content.add_widget(root)

        self.content.add_widget(HomePage())

        return sc

      

if __name__ == '__main__':

    ShowcaseApp().run()

[SANDEEP KUSHWAHA]

the flow is something like this:

HomePage->UploadDriver->BrowseFile

PFA screenshot of GUI:

when we click next in HomePage it takes to UploadDriver where we have BrowseFile button,on clicking this we get a popup containing filechooser and two buttons 'ok' and '.

'cancel'. on clicking ok it should update the label in p2 with selected file in popup.

[ZenCODE]

Okay, I can't run it, I get an error:

   File "/media/ZenOne/Zen/My Documents/Kivy/kivybits/Temp/main.py", line 40, in <module>
     Builder.load_file('homepage.kv')
   File "/home/fruitbat/Documents/kivy/kivy/kivy/lang/builder.py", line 287, in load_file
     with open(filename, 'r') as fd:
 IOError: [Errno 2] No such file or directory: 'homepage.kv'

Please post that file. But I see there are more.

    Builder.load_file('homepage.kv')
    Builder.load_file('porting.kv')
    Builder.load_file('uploaddriver.kv')
    Builder.load_file('customdb.kv')
    Builder.load_file('popup.kv')

I would  try  guess in the meanwhile. But I can't because I can't see what p2 is either. And I can't see to how this would work, as your

    ok_b.bind(on_press=self.UploadDriver.update_label)

calls a function that does not accept the correct number of parameters?

    def update_label(self):
        self.ids.driver_id.text = driver_path

Perhaps I could just give an example of how to use a popup to pass back a value?

    https://github.com/Zen-CODE/kivybits/blob/master/ColorPickerPopup/main.py

[SANDEEP KUSHWAHA]

i am able to pass the values if both popup and label are defined in the same class.But here i have defined in two separate class UploadDriver and BrowseFile.I read somewhere that it is not possible to update label like that till kivy1.7.

kivy 1.9 does it automatically as when value changes.But finding tough to upgrade with with so many dependencies requirement.

thanks Zenky for all the help!!!

[ZenCODE]

:-) If I could run it, it would be so much easier to help. Can you mail me a zip with everything? (I promise I will not distribute it). Or send me a private message with a download link? With Python, it's always possible. The only question is how....