from guizero import App, TextBox, PushButton, Box, Combo, Slider, MenuBar

# function for reading files
def open_file():
     # Use filedialog introduced in guizero 1.1.0, may need to alter check to None if bug is fixed
    file_name_open = app.select_file(title="Select file", folder=".", filetypes=[["All files", "*.*"]], save=False)
    if file_name_open is not "":
        with open(file_name_open, "r") as f:
            editor.value = f.read()
            file_name.value = file_name_open

# function for writing files
def save_file():
    # Use filedialog introduced in guizero 1.1.0, may need to alter check to None if bug is fixed
    file_name_save = app.select_file(title="Select file", folder=".", filetypes=[["All files", "*.*"]], save=True)
    if file_name_save is not "":
        with open(file_name_save, "w") as f:
            f.write(editor.value)
            save_button.disable()
            file_name.value = file_name_save

def enable_save():
    save_button.enable()

def change_font():
    editor.font = font.value
    colour.font = font.value
    font.font = font.value

def change_text_size():
    editor.text_size = size.value
     # resize the widget because if the text is made bigger, this might affect the size of the TextBox so guizero needs to know how to maintain the intended layout
    editor.resize(1, 1)
    editor.resize("fill", "fill")

def change_text_colour():
    editor.text_color = colour.value
    font.text_color = colour.value
    colour.text_color = colour.value

def edit_cut():
    pass
def edit_copy():
    pass
def edit_paste():
    pass
def edit_selectall():
    pass

def tools_settings():
    pass
def tools_help():
    app.info("help", "you will find help at www.MyNotepad.not.com")
def tools_about():
    app.info("about","v 0.000001 \n created by : me \n year : 2021")


 # A new function that closes the app
def exit_app():
    app.destroy()

app = App(title="My simple notepad")

# The new MenuBar
menubar = MenuBar(app,
                  toplevel=["File", "Edit", "Tools"],
                  options=[
                      [ ["open", open_file], ["save", save_file], ["exit", exit_app] ],
                      [ ["cut", edit_cut], ["copy", edit_copy], ["paste", edit_paste], ["select all", edit_selectall] ],
                      [ ["settings", tools_settings], ["help", tools_help], ["about", tools_about] ]
                          ])

 # create a box to house the controls, we want the box to span the entire width of the app
file_controls = Box(app, align="top", width="fill")
preferences_controls = Box(app, align="top", width="fill", border=True)
file_controls2 = Box(app, align="bottom", width="fill")


# File name and open
file_name = TextBox(file_controls, text="text_file.txt", width=50, align="left")
open_button = PushButton(file_controls, text="Open",  align="right", command = open_file)

# font choice
font = Combo(preferences_controls, options=["ariel", "courier", "times new roman", "verdana"], align="left", command=change_font)
colour = Combo(preferences_controls, options=["black", "gray", "light gray", "white", "red", "green", "blue"], align="left", command = change_text_colour)
size = Slider(preferences_controls,  align="left", command=change_text_size, start=10, end=18)



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

# Save
save_button = PushButton(file_controls2, text="Save",  align="right", command = save_file)

app.display()