This code is based on the Tcl
menubu.tcl demo. It demonstrates the use of
ttk.Menubutton as well as
ttk.OptionMenu. The button labels refer to the positions of the
popup-menus and not the position of the budget within the window.
# File: menubu.py
# http://www.tcl.tk/man/tcl8.5/TkCmd/ttk_menubutton.htm
# http://infohost.nmt.edu/tcc/help/pubs/tkinter//menu.html
# http://infohost.nmt.edu/tcc/help/pubs/tkinter//optionmenu.html
# http://www.tcl.tk/man/tcl8.5/TkCmd/optionMenu.htm
# http://tkinter.unpythonic.net/wiki/A_tour_of_Tkinter_widgets (menubuttons.py)
from tkinter import *
from tkinter import ttk
from demopanels import MsgPanel, SeeDismissPanel
class MenuButtonsDemo(ttk.Frame):
def __init__(self, isapp=True, name='menubuttonsdemo'):
ttk.Frame.__init__(self, name=name)
self.pack(expand=Y, fill=BOTH)
self.master.title('Menu Buttons Demo')
self.isapp = isapp
self._create_widgets()
def _create_widgets(self):
if self.isapp:
SeeDismissPanel(self)
self._create_demo_panel()
def _create_demo_panel(self):
demoPanel = Frame(self)
demoPanel.pack(side=TOP, fill=BOTH, expand=Y)
self._below_btn(demoPanel)
self._left_btn(demoPanel)
self._center_panel(demoPanel)
self._right_btn(demoPanel)
self._above_btn(demoPanel)
def _below_btn(self, parent):
menu = Menu(parent, tearoff=False)
mb = ttk.Menubutton(parent, text='Below', underline=0, direction='below',
menu=menu)
menu.add_command(label='Below menu: first item')
menu.add_command(label="Below menu: second item")
mb.grid(row=0, column=1, sticky=N)
def _left_btn(self, parent):
menu = Menu(parent, tearoff=False)
mb = ttk.Menubutton(parent, text='Left', underline=0,
direction='left', menu=menu)
menu.add_command(label='Left menu: first item')
menu.add_command(label='Left menu: seconditem')
mb.grid(row=1, column=2, sticky=E)
def _center_panel(self, parent):
txt = ['This is a demonstration of menubuttons. The "Below" ',
'menubutton pops its menu below the button; the "Right" ',
'button pops to the right, etc.\n\nThere are two option ',
'menus directly below this text; one is just a standard ',
'menu and the other is a 15-color palette.']
frame = ttk.Frame(parent)
label = ttk.Label(frame, wraplength=300, font='Helvictica 14',
justify=LEFT,text=''.join(txt))
label.pack(side=TOP, padx=25, pady=25)
# option menus
self._create_option_menu_one(frame)
self._create_color_palette(frame)
frame.grid(row=1, column=1, sticky='news')
def _create_option_menu_one(self, parent):
# Note that the 0-index of the values appears
# to be reserved for the associated StringVar value
# if the first value is not left blank, it will
# not display in the pop-up
self.__optVar = StringVar()
om1 = ttk.OptionMenu(parent, self.__optVar, *('','one', 'two', 'three'),
direction='flush')
self.__optVar.set('one')
om1.pack(side=LEFT, padx=25, pady=25)
def _create_color_palette(self, parent):
# creates a 'color palette' as an 'option menu'
# the default placement (direction) of the popup
# menu is 'below' the button; the direction
# can be any of: right, left, above and flush
# the first value appears to be internally
# reserved for the associated StringVar value
# if it is not left blank, the first color will
# not appear in the palette and all subsequent
# color/name matchups are off by 1
colors = ('', 'Black', 'red4', 'DarkGreen',
'NavyBlue', 'gray75', 'Red', 'Green',
'Blue', 'gray50', 'Yellow', 'Cyan',
'Magenta', 'White', 'Brown', 'DarkSeaGreen')
# create the option menu
self.__colorVar = StringVar(self)
om = ttk.OptionMenu(parent, self.__colorVar, *colors,
direction='flush')
self.__colorVar.set('Black')
# the color images are garbage collected if not saved
self.__colorImgs = []
for i in range(len(colors)):
c = om['menu'].entryconfigure(i, 'label')[-1]
img = PhotoImage(name='image_'.join(c),
width=16, height=16)
img.put(c, to=(1,1,15,15)) # color the image
self.__colorImgs.append(img) # save the image
# attach the image to its color name
om['menu'].entryconfigure(i, image=img,
hidemargin=True)
if not i%4: # display in grid, 4 across
om['menu'].entryconfigure(i, columnbreak=True)
# if used, the 'tearoff' appears to the left of the palette
# rather than 'above' it; also, if it is set to
# 'True' BEFORE the images are created the 'columnbreak'
# entry option is not recognized
#om['menu'].configure(tearoff=True)
om.pack(side=RIGHT, padx=25, pady=25)
def _right_btn(self, parent):
menu = Menu(parent, tearoff=False)
mb = ttk.Menubutton(parent, text='Right', underline=0, direction='right',
menu=menu)
menu.add_command(label='Right menu: first item')
menu.add_command(label='Right menu: second item')
mb.grid(row=1, column=0, sticky=W)
def _above_btn(self, parent):
menu = Menu(parent, tearoff=False)
mb = ttk.Menubutton(parent, text='Above', underline=0,
direction='above', menu=menu)
menu.add_command(label='Above menu: first item')
menu.add_command(label='Above menu: second item')
mb.grid(row=2, column=1, sticky=S)
if __name__ == '__main__':
MenuButtonsDemo().mainloop()
