textEditor_V1.1

from guizero import App, TextBox, Text, PushButton, Box, Combo, CheckBox

# function for reading files
def open_file():
    with open(file_name.value, "r") as f:
        editor.value = f.read()
        app.title = "Now editing " + file_name.value

# function for writing files
def save_file():
    with open(file_name.value, "w") as f:
        f.write(editor.value)
        app.title = file_name.value + " successfully saved!"
    save_button.disable()
    file_name.disable()

def showHide():
    if chk_showHide.value == True:
        box_appearance_controls.show()
    elif chk_showHide.value == False:
        box_appearance_controls.hide()

def bg_col():
    if cmb_bg.value == "Calm":
        editor.bg = "#fcdd88"
        editor.text_color = "#855600"
    elif cmb_bg.value == "Clear":
        editor.bg = "#ffffff"
        editor.text_color = "#2222ff"
    elif cmb_bg.value == "Hacker":
        editor.bg = "#000000"
        editor.text_color = "#4cf000"

def font_up():
    editor.text_size = editor.text_size + 2

def font_down():
    editor.text_size = editor.text_size - 2

def enable_save():
    save_button.enable()

app = App(title="texteditor", width=500)

#Box to house the show/hide control widget
box_showHide = Box(app, align="left", visible=True)
box_showHide.bg="#fcdd88"
chk_showHide = CheckBox(box_showHide, text="toolbar on or off", height=50, align="left", visible=True, enabled=True, command=showHide)

#Box to house the visual options
box_appearance_controls = Box(app, layout="auto", align="top", width="fill", height=50)

#Widgets for background colour
lbl_background = Text(box_appearance_controls, text="What's your mood?", align="left")
cmb_bg = Combo(box_appearance_controls, options=["Clear", "Hacker", "Calm"], align="left", height="fill", command=bg_col)

#Widgets for font size
lbl_size = Text(box_appearance_controls, text="        Font size: ", align="left")
#box_spacer = Box(box_appearance_controls, width=25, align="left", height="fill")
btn_font_up = PushButton(box_appearance_controls, command=font_up, text="+", align="left")
btn_font_down = PushButton(box_appearance_controls, command=font_down, text="-", align="left")


# create a TextBox which is not in the box and fills the rest of the GUI
editor = TextBox(app, multiline=True, height="fill", width="fill", scrollbar=True, command=enable_save)


# create a box to house the controls, we want the box to span the entire width
file_controls = Box(app, align="bottom", width="fill")

# create a TextBox for the file name
file_name = TextBox(file_controls, text="type file name here (add .txt to the end)", width=40, align="left")

# create an open button which uses the open_file function
open_button = PushButton(file_controls, text="Open",  align="right", command=open_file)

box_spacer = Box(file_controls, width=15, align="right")

# create a save button which uses the save_file function
save_button = PushButton(file_controls, text="Save",  align="right", command=save_file, enabled=False)

app.display()