Kivy Popup handling

[Dragan Mestrovik]

Hi,

I am new to App development, Kivy and Python. I tried to show a popup on a button click. When click "Cancel" button on popup, it should get dismissed. I think there is a mistake in my code. When i clicked on 'Cancel' button on popup, nothing happening. Can anyone help me?

import kivy

from kivy.app import App

from kivy.uix.floatlayout import FloatLayout

from kivy.uix.label import Label

from kivy.uix.textinput import TextInput

from kivy.uix.button import Button

from kivy.uix.popup import Popup

class NotesMainScreen(FloatLayout):

def Download(self,btn):

DownloadCompletePopup().run()

def __init__(self,**kwargs):

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

self.add_widget(Label(text="Welcome ", pos=(100, 300), size_hint = (.1,.05)))

self.Url = TextInput(multiline = False, pos=(200, 300), size_hint = (.1,.05))

self.add_widget(self.Url)

btnRun = Button(text="Run", pos=(300,300), size_hint = (.1,.05))

btnRun.bind(on_press = self.Download)

self.add_widget(btnRun)

class DownloadCompletePopup(App):

    #override the build method and return the root widget of this App

    def build(self):

        # Define a layout for this App

        self.layout = FloatLayout()            

        popupLabel  = Label(text  = "Hoorey Completed!!", pos=(300,300), size_hint = (.3,.1))

        closeButton = Button(text = "Close", pos=(320,250), size_hint = (.2,.2))

        self.layout.add_widget(popupLabel)

        self.layout.add_widget(closeButton)       

        # Instantiate the modal popup and display

        popup = Popup(title='Donwload Completed', content=self.layout, pos=(300,300), size_hint=(.4, .3), auto_dismiss=False)  

# Attach close button press with popup.dismiss action

        closeButton.bind(on_press = popup.dismiss) 

        popup.open()         

class Notes(App):

def build(self):

return NotesMainScreen()

if __name__ == '__main__':

Notes().run()

[Dragan Mestrovik]

I fixed this by moving popup related code to main class.

[Jacek Blocki]

App.build() is run before actual application start, so event binding in this method does not work since EventDispatcher structures are not yet initialized.
JB