Text Editor v 2

from guizero import App, Box, PushButton, TextBox, Combo, Text, info, Window

app = App(title="Text Editor",width="800",height="600")

# Event Handlers

def btnSaveClicked():
    f =  open(txtFilename.value, "w")
    f.write(txtEditor.value)
    f.close()
    info('SAVE','Your file has been saved')

def btnLoadClicked():
    with open(txtFilename.value, "r") as f:
        txtEditor.value = f.read()

def ChangeBgcolour():
    boxEditor.bg = cboChangeBg.value
    bgWindow.hide()

def btnChangeFontSize():
    fontSizeWindow.show(wait=True)

def btnChangeFont():
    fontWindow.show(wait = True)

def btnChangeBg():
    bgWindow.show(wait = True)


def FontChanged():
    boxEditor.font = cboChangeFont.value
    fontWindow.hide()

def ChangeFontSize():
    boxEditor.text_size = int(cboChangeFontSize.value)
    fontSizeWindow.hide()

def cboCancel():
    fontWindow.hide()

def cboCancel2():
    fontSizeWindow.hide()

def cboCancel3():
    bgWindow.hide()

# Your GUI widgets go here

####################################################################

boxFileControls = Box(app, align="top", width='fill', height = 50)
boxFileControls.bg = "white"
boxFileControls.text_color = 'black'
btnOpen   = PushButton(boxFileControls, align="left", text = "", image = "store-files.jpg", width = 40, height = 40, command = btnLoadClicked)
lblBlank  = Text(boxFileControls,text = '', width = 1, align = 'left')
btnSave   = PushButton(boxFileControls, align="left", text = "", image = "save-files.jpg",  command = btnSaveClicked)
lblBlank  = Text(boxFileControls,text = '', width = 5, align = 'left')
btnFont   = PushButton(boxFileControls, align="left", text = "", image = "font.jpg", width = 40, height = 40, command = btnChangeFont)
lblBlank  = Text(boxFileControls,text = '', width = 1, align = 'left')
btnSize   = PushButton(boxFileControls, align="left", text = "", image = "text.jpg", width = 40, height = 40, command = btnChangeFontSize)
lblBlank  = Text(boxFileControls,text = '', width = 1, align = 'left')
btnBg     = PushButton(boxFileControls, align="left", text = "", image = "bg.jpg", width = 40, height = 40, command = btnChangeBg)
txtFilename = TextBox(boxFileControls, text = 'editor.txt', width = 20, height = 'fill', align = 'right')
txtFilename.text_size =12

####################################################################

boxEditor = Box(app, align = 'top', width='fill', height = 'fill', border = 1)
boxEditor.bg = 'light yellow'
boxEditor.font ='Palatino Linotype'
txtEditor = TextBox(boxEditor, width = 'fill', height = 'fill', multiline = True, scrollbar = True)

####################################################################

# Windows

# Font Window
fontWindow = Window(app,"Change Font",width = 300, height = 200)
fontWindow.bg = 'light blue'
fontWindow.font='Segoe Ui'
fontWindow.hide()

lblChangeFont = Text(fontWindow, text = "Select a font", align='top')
cboChangeFont = Combo(fontWindow, options = ['Times New Roman','Courier New', 'Palatino Linotype', 'Segoe UI'],align = 'top')
btnSubmit1 = PushButton(fontWindow, text = 'OK', align = 'left', width = 20, command = FontChanged)
btnCancel1 = PushButton(fontWindow, text = 'CANCEL', align = 'left', width = 20, command = cboCancel)

# Font Size Window
fontSizeWindow = Window(app,"Change Font Size",width = 300, height = 200)
fontSizeWindow.bg = 'light blue'
fontSizeWindow.font='Segoe Ui'
fontSizeWindow.hide()

lblChangeFontSize = Text(fontSizeWindow, text = "Select a size",align="top")
cboChangeFontSize = Combo(fontSizeWindow, options = ['10','12','14','16','18'],align="top")
btnSubmit2 = PushButton(fontSizeWindow, text = 'OK', align = 'left', width = 20, command = ChangeFontSize)
btnCancel2 = PushButton(fontSizeWindow, text = 'CANCEL', align = 'left', width = 20, command = cboCancel2)

# Background Colour Window
bgWindow = Window(app,"Change Background Colour",width = 300, height = 200)
bgWindow.bg = 'light blue'
bgWindow.font='Segoe Ui'
bgWindow.hide()

lblChangeBg= Text(bgWindow, text = "Select a colour",align="top")
cboChangeBg = Combo(bgWindow, options = ['light yellow','honeydew','light blue','lavender','pink'],align="top")
btnSubmit3 = PushButton(bgWindow, text = 'OK', align = 'left', width = 20, command = ChangeBgcolour)
btnCancel3 = PushButton(bgWindow, text = 'CANCEL', align = 'left', width = 20, command = cboCancel3)

####################################################################
# Show the GUI on the screen
app.display()