Menu.py

Various forms of menus: menubar, combobox, popup.

# This file is part of Nictk - A simple tkinter wrapper.
#    Copyright (C) 2021-2024 Nicola Cassetta
#    See <https://github.com/ncassetta/Nictk>
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU Lesser General Public License as published
#    by the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU Lesser General Public License for more details.
#
#    You should have received a copy of the Lesser GNU General Public License
#    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 
# Allows import from parent folder. You can delete this if you install the package
import _setup
 
import Nictk as Ntk
from Nictk.constants import *
 
 
# callbacks (you may prefer to use lambdas)
def hitmenu(event):
    labText.set_content("You have chosen '" + event.value + "' from the menu in the menubar")
    
def hitmenubutton(event):
    labText.set_content("Edit is " + editon.get())
    
def hitcolors(event):
    labText.config(bcolor=event.value)
 
def hitpopup(event):
    labText.set_content("You have chosen '" + event.value + "' from the popup menu")
 
def hitcombo(event):
    labText.set_content("You have chosen '" + event.value + "' from the combobox")
    
 
 
winMain = Ntk.Main(200, 180, 640, 480, "Menu example")
winMain.config_children(Ntk.Label, relief=SOLID, borderwidth=1)
# menu bar (auto added to the parent winMain)
menuBar = Ntk.Menu(winMain)
# first menu (auto added to the parent menuBar)
menuFile = Ntk.Menu(menuBar, "File")
menuFile.add_command(label="Open", command=(hitmenu, "Open"))
menuFile.add_command(label="Save", command=(hitmenu, "Save"))
menuFile.add_command(label="Save as ...", command=(hitmenu, "Save as ..."))
menuFile.add_separator()
menuFile.add_command(label="Quit", command=lambda event: winMain.destroy())
# second menu (auto added to the parent menuBar)
menuEdit = Ntk.Menu(menuBar, "Edit")
menuEdit.add_checkbutton(label="Edit on", command=hitmenubutton)
# sets the variable for the checkbutton (you can use as index the number (from 0)
# or the label
editon = Ntk.StringVar()
menuEdit.entry_set_variable("Edit on", variable=editon, offvalue="off", onvalue="on")
# third menu
menuColors = Ntk.Menu(menuBar, "Colors")
menuColors.add_command(label="Change to green", command=(hitcolors, "light green"))
menuColors.add_command(label="Change to pink", command=(hitcolors, "pink"))
menuColors.add_command(label="Change to blue", command=(hitcolors, "light blue"))
# menu entries option config. You can use as index the number (from 0) or the label
menuColors.entry_config(0, bcolor="light green")
menuColors.entry_config(1, bcolor="pink")
menuColors.entry_config(2, bcolor="light blue")
 
# popup menu (not added to the parent because popup is True)
menuPopup = Ntk.Menu(winMain, popup=True)
menuPopup.add_command(label="Cut", command=(hitpopup, "Cut"))
menuPopup.add_command(label="Copy", command=(hitpopup, "Copy"))
menuPopup.add_command(label="Paste", command=(hitpopup, "Paste"))
 
# creates the upper label and binds double click on it to popup opening
labPopup=Ntk.Label(winMain, 0, "10%", "fill", 100, pad=(15, 10), content="Double click to open a popup", )
labPopup.bind("<Double-Button-1>", lambda event: menuPopup.post(event.x_root, event.y_root))
labPopup.config(bcolor="orange", anchor=CENTER, font=("Arial", 12, "bold"))
 
#creates the middle Combobox
cmbmenu = ["Option " + str(i + 1) for i in range(100)]
cmbSample = Ntk.Combobox(winMain, CENTER, PACK, "80%", 50, pad=(0, 5), items=cmbmenu, command=hitcombo)
cmbSample.config(fcolor="dark blue", afcolor="blue", font=("Arial", 12, "bold"))
 
#creates the lower label
labText = Ntk.Label(winMain, PACK, PACK, FILL, FILL, pad=(15, 10))
labText.config(bcolor="light green", fcolor="dark green", font=("Arial", 16), anchor=CENTER)
 
Ntk.mainloop()