Bdtjtk

## Python File ##

from kivy.app import App

from kivy.uix.widget import Widget

from kivy.lang import Builder



    class Chat(Widget):

        pass



        def __init__(self):

            super(Chat,self).__init__()







    class ChatApp(App):

        def post(self,msg):



            if len(msg)>0:

                msgbox=Chat()

                msgbox.ids.mlab.text=msg

                self.root.ids.chatbox.add_widget(msgbox)   #add widget when a button is pressed

                self.root.ids.text_inpt.text=''   #after adding the widget clear the textinput widget's text



        def build(self):

            return Chat()





  myapp = ChatApp()

      myapp.run()

1. I am trying to add a label whenever the button is pressed with the text from the text input.




2. Instead it's throwing an error or showing nothing on the screen.



3. 
   

   Further, I want to add another method which makes it as a chatting screen.So,for that I need to make the input label to align right and response label to align Left.

   
   
   

   Thank you for your help in advance!!!

   
   

KV FILE

<Label>:

    center: root.center

    padding: (-10,0)

    markup: True

    text_size: (None, None)

    valign: 'top'

    size_hint: (1, None)

    color: 0, 0, 0



<BoxLayout>:

    padding: 10

    spacing: 10



<Button>:

    font_size: 30

    height: 60

    size_hint: (1, None)

    border: (1, 1, 1, 1)



<TextInput>:

    font_size: 20

    multiline: True

    padding: [10, 0.5 * (self.height - self.line_height)]





<Chat@Widget>:

    Label:

        id: mlab

        padding: 10, 10

        markup: True

        text_size: (None, None)

        text: ''

        haligh: 'left'

        valign: 'top'

        size_hint: (1, None)

        size: self.texture_size

        color: 0, 0, 0

    BoxLayout:



        orientation: 'vertical'

        size:root.size

        ScrollView:



            id:scrlv



            canvas.before:

                Color:

                    rgb: 1, 1, 1

                Rectangle:

                    pos: self.pos

                    size: self.size



            StackLayout:

                id:chatbox

                padding: 10, 10

                orientation: 'tb-rl'





        BoxLayout:

            height: 60

            orientation: 'horizontal'

            padding: 0

            size_hint: (1, None)



            TextInput:

                id:text_inpt



            Button:

                text: 'Send'

                size_hint: (0.3, 1)

                on_release: app.post(text_inpt.text)