ColinsEditorMk2

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

app = App(title="Colin File Editor")

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

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

# change font function
def change_font():
    editor.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_colour():
    editor.text_color = colur.value


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

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

#create some padding for the filename box
pad = Box(file_controls, align="left", width=8, height= 1)

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

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

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


#create a place for text preferences called pref controls
pref_controls = Box(app, align="bottom", width="fill", border=True)

#create some padding for the pref_controls box
pad2 = Box(pref_controls, align="left", width=8, height= 1)

#create the Combo for Font Selection
font = Combo(pref_controls, options=["courier", "times new roman", "verdana"], align="left", command=change_font,)

#Font Size Changer
size = Slider(pref_controls,  align="left", command=change_text_size, start=10, end=18)

#Font Colour Changer
colur = Combo(pref_controls, options=["green", "red", "blue", "black"],align="left", command=change_colour)

app.display()