MyTextEditor.py

from guizero import App, TextBox, Slider, Box, Text, ButtonGroup, PushButton, Combo, CheckBox, ListBox, Picture

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)
    # Disable the save_button
    save_button.disable()

def enable_save():
    save_button.enable()
    save_button.show()


def change_text_font():
    editor.font = font_list.value[font_select]

def change_text_color():
    editor.color = "red"#color_list[1]#color_select.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")

app = App(title="texteditor")

font_list  = ['times new roman','helvetica','gothic','mincho']
color_list = ['black','red','tan','blue','green','cyan','yellow','megenta','gray']

# 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")

# create a TextBox for the file name
file_name = TextBox(file_controls, text="text_file.txt", width=28, align="left")
# create a save button which uses the save_file function
save_button = PushButton(file_controls, text="Save",  align="right", height= 1)
save_button.command=save_file
save_button.disable()
save_button.hide()

# create an open button which uses the open_file function
open_button = PushButton(file_controls, text="Open",  align="right", height= 1)
open_button.command=open_file

#
# 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",command=enable_save)


preferences_controls = Box(app, align="bottom", width="fill", border=True)
#create a font combo
# Times New Roman 12
# helvetica 12
# gothic 13
# mincho 13
font_select  = Combo(preferences_controls, align="right",width="fill", height= 1, options=font_list,  selected=font_list[0])
font_select.command=change_text_font
color_select = Combo(preferences_controls, align="right",width="fill", height= 1, options=color_list, selected=color_list[0])
color_select.command=change_text_color
size = Slider(preferences_controls,  align="left", start = 8, end = 42, command=change_text_size)


app.display()