Transposer 0.1.1

import kivy
kivy.require('1.0.8')
from sys import exit
from kivy.app import App
from kivy.core.window import Window
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.uix.anchorlayout import AnchorLayout
from kivy.uix.scrollview import ScrollView
from kivy.uix.gridlayout import GridLayout
from kivy.uix.popup import Popup

class BoundedLabel(Label):
    pass

class Transpose(App):
    def exit(instance):
        sys.exit()

    def build(self):
        def LoadLabels(w):
            if w == 0:
                tex0 = self.text1
                tex1 = self.text2
            else:
                tex0 = self.text3
                tex1 = self.text4
            for i in range(0,22):
                if i <= 12:
                    if i < 10:
                        t1 = " " + str(i) + "| "
                    else:
                        t1 = str(i) + "| "
                    t = tex1
                else:
                    t1 = ''
                    t = ''
                l = BoundedLabel(text=t1+t[(i*6):(i*6)+78], size=(780, 35),
                             size_hint=(None, None),halign='left',font_name='data/fonts/DroidSansMono.ttf')
                s.add_widget(l)

        def Swap(instance):
            if self.whichway == 0:
                self.whichway = 1
                btnWhich.text = "Guitar --> Piano"
                btn1.text = "    " + self.text3
                s.clear_widgets()
                LoadLabels(1)
            else:
                self.whichway = 0
                btnWhich.text = "Piano --> Guitar"
                btn1.text = "    " + self.text1
                s.clear_widgets()
                LoadLabels(0)

        def ShowAbout(instance):
            print "About to Popup"
            popup.open()

        self.whichway=0
        self.text1 = "  C  |  B  |A#/Bb|  A  |G#/Ab|  G  |F#/Gb|  F  |  E  |D#/Eb|  D  |C#/Db|  C  |"
        self.text2 = "  C  |  B  |A#/Bb|  A  |G#/Ab|  G  |F#/Gb|  F  |  E  |D#/Eb|  D  |C#/Db|  C  |  B  |A#/Bb|  A  |G#/Ab|  G  |F#/Gb|  F  |  E  |D#/Ab|  D  |C#/Db|  C  |"
        self.text3 = "  C  |C#/Db|  D  |D#/Eb|  E  |  F  |F#/Gb|  G  |G#/Ab|  A  |A#/Bb|  B  |  C  |"
        self.text4 = "  C  |C#/Db|  D  |D#/Eb|  E  |  F  |F#/Gb|  G  |G#/Ab|  A  |A#/Bb|  B  |  C  |C#/Db|  D  |D#/Eb|  E  |  F  |F#/Gb|  G  |G#/Ab|  A  |A#/Bb|  B  |  C  |C#/Db|"

        root = GridLayout(orientation='vertical', spacing=6, cols=1,rows=4,row_default_height=40)
        lbl = Label(text='Transposer Ver 0.8.0',font_size=20,size_hint=(None,None),size=(480,20),padding=(10,10))
        btn1 = Button(text = "    " + self.text1,size=(780,20),
                size_hint=(None, None),
                halign='left',
                font_name='data/fonts/DroidSansMono.ttf',
                padding=(20,2),
                background_color=[0.39,0.07,.92,1])
        al0 = AnchorLayout()
        al1 = AnchorLayout()
        al2 = AnchorLayout()
        popup = Popup(title='About Transposer',
                    content=Label(text='Written by G.D. Walters'),
                    size_hint=(None,None),size=(400,400))
        btnWhich = Button(text = "Piano --> Guitar",size=(180,40),size_hint=(None,None))
        btnWhich.bind(on_release=Swap)
        btnAbout=Button(text="About",size=(180,40),size_hint=(None,None))
        btnAbout.bind(on_release=ShowAbout)
        btnExit =Button(text="Exit", size=(180,40),size_hint=(None,None))
        btnExit.bind(on_release=exit)
        #--------------------------------------------------------------
        root.add_widget(lbl)
        root.add_widget(btn1)
        #--------------------------------------------------------------
        s = GridLayout(cols=1, spacing = 4, size_hint_y = None)
        s.bind(minimum_height=s.setter('height'))
        LoadLabels(0)
        #--------------------------------------------------------------
        sv = ScrollView(size_hint=(None, None), size=(600,400))

        sv.center = Window.center
        root.add_widget(sv)
        sv.add_widget(s)
        al0.add_widget(btnWhich)
        al1.add_widget(btnExit)
        al2.add_widget(btnAbout)
        bgl = GridLayout(orientation='vertical', spacing=6, cols=3,rows=1,row_default_height=40)
        bgl.add_widget(al0)
        bgl.add_widget(al1)
        bgl.add_widget(al2)
        root.add_widget(bgl)
        return root

if __name__ in ('__main__','__android__'):
    Transpose().run()