from guizero import App, Text, TextBox, Box, MenuBar, Combo, Slider, info

# These are the functions that are called by selecting options from each submenu

editor_text_saved = False

def open_file():
    with open(file_name.value, "r") as f:
        editor.value = f.read()

def save_file():
    with open(file_name.value, "w") as f:
        f.write(editor.value)
    editor.bg="White"

def exit_app():
    if (editor.bg == "Light Grey"):
        info("Warning","You must save file before exit ...")
    else:
        app.destroy()

def clear_text():
    editor.clear()

def wonb():
    if (editor.bg == "Light Grey"):
        info("Warning","You must save file before doing this ...")
    else:
        editor.bg= "black"
        editor.text_color= "white"

def bonw():
    if (editor.bg == "Light Grey"):
        info("Warning","You must save file before doing this ...")
    else:
        editor.bg= "white"
        editor.text_color= "black"

# This is a text editor with menu

app = App(title="Text Editor with menu")

# The new MenuBar
menubar = MenuBar(app,
    toplevel=["File","Options"],
    options=[[["open",open_file],["save",save_file],["exit",exit_app]],
                 [["clear",clear_text],["white on black",wonb],["black on white",bonw]]])

file_controls = Box(app, align="top", width="fill")
font_controls = Box(app, align="top", width="fill", )

file_label = Text(file_controls, text="File Name", width=10, align="left")
file_name = TextBox(file_controls, text="Infinito.txt", width=50, align="left")

# function to select font
def select_font():
    editor.font= font_choice.value

# menu to select a font
font_choice = Combo(font_controls, options=["Bitstream", "Courier", "eufm10", "Helvetica", "Purisa", "Times"],
                    selected="Bitstream", command=select_font, width=10, align="left")

# function to select font color
def select_color():
    editor.text_color= font_color.value

# menu to select a font
font_color = Combo(font_controls, options=["Yellow", "Blue", "Green", "Black", "Red", "Violet"],
                    selected="Grey", command=select_color, width=10, align="left")

# create a Text for the font size
font_size_label = Text(font_controls, text="Font Size", width=10, align="left")

# function to select font size
def slider_changed(slider_value):
    editor.text_size= font_size.value

font_size = Slider(font_controls, command=slider_changed, start=10, end=40, width=80, align="left")

def set_not_saved():
    editor.bg="Light Grey"

editor = TextBox(app, multiline=True, scrollbar=True, height="fill", width="fill", command=set_not_saved)

app.display()