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

app = App(title="texteditor")

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

# function for writing files
def save_file():
    with open(file_name.value, "w") as f:
        f.write(editor.value)

def change_font_type():
    editor.font = cmb_font_type.value

def change_font_size():
    editor.text_size = cmb_font_size.value

def change_font_color():
    editor.text_color = cmb_font_color.value

box_ribbon = Box(app, align="top", width="fill")


# create a box to house the controls, we want the box to span the entire width of the app
box_file_controls = Box(box_ribbon, align="top", width="fill")

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

# create a save button which uses the save_file function
save_button = PushButton(box_file_controls, text="Save",  align="left", command=save_file)

# create a TextBox for the file name
file_name = TextBox(box_file_controls, text="text_file.txt", width=50, align="right")

box_font_controls = Box(box_ribbon, align="top", width="fill")

cmb_font_type = Combo (box_font_controls, options=["courier", "helvetica", "times new roman"], align="left", command=change_font_type, width = 16)
cmb_font_size = Combo (box_font_controls, options=["8", "12", "16", "24"], align="left", command=change_font_size, width = 4)
cmb_font_color = Combo (box_font_controls, options=["black", "red", "blue", "green"], align="left", command=change_font_color, width = 8)


# 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")

app.display()