Develop Reference

Get tkinter window that triggered event?

When a resize event is triggered, how could I retrieve the toplevel, from which this event was triggered?
I have written a small programm, where the main window has a button that opens another window and each new window gets a binding for the resize method that currently prints the height and width of the window. In the main project, the toplevel is used as an index for lists to retrieve information for that specific window, so it would be ideal to be able to retrieve the toplevel as well. Is that possible, either directly or indirectly?
import tkinter as tk
class MyApp(tk.Frame):
def __init__(self, master = None):
self.main()
tk.Frame.__init__(self, master)
def main(self):
btn = tk.Button(root, text="New Window", command=self.neues_fenster)
btn.grid(row=0, column = 0)
def neues_fenster(self):
top = tk.Toplevel()
top.title("Some Window")
top.minsize(width = 150, height = 150)
top.bind("<Configure>", self.resize)
def resize(self, event):
print("width", event.width, "height", event.height)
if __name__=="__main__":
root = tk.Tk()
myapp = MyApp(master = root)
myapp.mainloop()

In effbot document,You could use event.widget to get the widget.(It is also okay even if it is toplevel).
All the possible attributes of event:

Hiding Tkinter root window while showing modal window

I have a TKinter-based application that attempts to manage settings for a game. Users may have multiple versions of this game installed, and in that case, I need to ask the user which installation they want to manage on startup. That part works well enough on its own; the selection dialog pops up after the main window is constructed, and runs modally.
However, due to differences between game versions, it would be useful if I could adapt the interface slightly for those cases. That, however, means I can't really build the main window until I know which installation I'm working on, so it's going to be blank until the user makes a choice.
I would like to hide the root window while this dialog is being shown, but calling withdraw on the root window simply causes the modal dialog to not be shown either - Python just ends up hanging with no CPU usage, and I can't figure out how to get around the problem without having to resort to a non-modal window (and a significantly different control flow, which I'd like to avoid).
Sample code exhibiting the problem and general code structure (Python 2.7):
from Tkinter import *
from ttk import *
class TkGui(object):
def __init__(self):
self.root = root = Tk()
self.root.withdraw()
selector = FolderSelection(self.root, ('foo', 'bar'))
self.root.deiconify()
print(selector.result)
class ChildWindow(object): #Base class
def __init__(self, parent, title):
top = self.top = Toplevel(parent)
self.parent = parent
top.title(title)
f = Frame(top)
self.create_controls(f)
f.pack(fill=BOTH, expand=Y)
def create_controls(self, container):
pass
def make_modal(self, on_cancel):
self.top.transient(self.parent)
self.top.wait_visibility() # Python will hang here...
self.top.grab_set()
self.top.focus_set()
self.top.protocol("WM_DELETE_WINDOW", on_cancel)
self.top.wait_window(self.top) # ...or here, if wait_visibility is removed
class FolderSelection(ChildWindow):
def __init__(self, parent, folders):
self.parent = parent
self.listvar = Variable(parent)
self.folderlist = None
super(FolderSelection, self).__init__(parent, 'Select folder')
self.result = ''
self.listvar.set(folders)
self.make_modal(self.cancel)
def create_controls(self, container):
f = Frame(container)
Label(
f, text='Please select the folder '
'you would like to use.').grid(column=0, row=0)
self.folderlist = Listbox(
f, listvariable=self.listvar, activestyle='dotbox')
self.folderlist.grid(column=0, row=1, sticky="nsew")
Button(
f, text='OK', command=self.ok
).grid(column=0, row=2, sticky="s")
self.folderlist.bind("<Double-1>", lambda e: self.ok())
f.pack(fill=BOTH, expand=Y)
def ok(self):
if len(self.folderlist.curselection()) != 0:
self.result = self.folderlist.get(self.folderlist.curselection()[0])
self.top.protocol('WM_DELETE_WINDOW', None)
self.top.destroy()
def cancel(self):
self.top.destroy()
TkGui()

It seems that in your case there is no difference, modal window or not. In fact, you just need to use the wait_window() method. According the docs:
In many situations, it is more practical to handle dialogs in a
synchronous fashion; create the dialog, display it, wait for the user
to close the dialog, and then resume execution of your application.
The wait_window method is exactly what we need; it enters a local
event loop, and doesn’t return until the given window is destroyed
(either via the destroy method, or explicitly via the window manager).
Consider follow example with nonmodal window:
from Tkinter import *
root = Tk()
def go():
wdw = Toplevel()
wdw.geometry('+400+400')
e = Entry(wdw)
e.pack()
e.focus_set()
#wdw.transient(root)
#wdw.grab_set()
root.wait_window(wdw)
print 'done!'
Button(root, text='Go', command=go).pack()
Button(root, text='Quit', command=root.destroy).pack()
root.mainloop()
When you click Go button, nonmodal dialog will appear, but code wil stop execution and the string done! will be displayed only after you close the dialog window.
If this is the behavior that you want, then here is your example in a modified form (I modified __init__ in TkGui and make_modal method, also added mainloop()):
from Tkinter import *
from ttk import *
class TkGui(object):
def __init__(self):
self.root = root = Tk()
self.root.withdraw()
selector = FolderSelection(self.root, ('foo', 'bar'))
self.root.deiconify()
print(selector.result)
class ChildWindow(object): #Base class
def __init__(self, parent, title):
top = self.top = Toplevel(parent)
self.parent = parent
top.title(title)
f = Frame(top)
self.create_controls(f)
f.pack(fill=BOTH, expand=Y)
def create_controls(self, container):
pass
def make_modal(self, on_cancel):
#self.top.transient(self.parent)
#self.top.wait_visibility() # Python will hang here...
#self.top.grab_set()
self.top.focus_set()
self.top.protocol("WM_DELETE_WINDOW", on_cancel)
self.top.wait_window(self.top) # ...or here, if wait_visibility is removed
class FolderSelection(ChildWindow):
def __init__(self, parent, folders):
self.parent = parent
self.listvar = Variable(parent)
self.folderlist = None
super(FolderSelection, self).__init__(parent, 'Select folder')
self.result = ''
self.listvar.set(folders)
self.make_modal(self.cancel)
def create_controls(self, container):
f = Frame(container)
Label(
f, text='Please select the folder '
'you would like to use.').grid(column=0, row=0)
self.folderlist = Listbox(
f, listvariable=self.listvar, activestyle='dotbox')
self.folderlist.grid(column=0, row=1, sticky="nsew")
Button(
f, text='OK', command=self.ok
).grid(column=0, row=2, sticky="s")
self.folderlist.bind("<Double-1>", lambda e: self.ok())
f.pack(fill=BOTH, expand=Y)
def ok(self):
if len(self.folderlist.curselection()) != 0:
self.result = self.folderlist.get(self.folderlist.curselection()[0])
self.top.protocol('WM_DELETE_WINDOW', None)
self.top.destroy()
def cancel(self):
self.top.destroy()
TkGui()
mainloop()
The code stops on line selector = FolderSelection(self.root, ('foo', 'bar')) and then continue after you close the dialog.

Display message when hovering over something with mouse cursor in Python

I have a GUI made with TKinter in Python. I would like to be able to display a message when my mouse cursor goes, for example, on top of a label or button. The purpose of this is to explain to the user what the button/label does or represents.
Is there a way to display text when hovering over a tkinter object in Python?

I think this would meet your requirements.
Here's what the output looks like:
First, A class named ToolTip which has methods showtip and hidetip is defined as follows:
from tkinter import *
class ToolTip(object):
def __init__(self, widget):
self.widget = widget
self.tipwindow = None
self.id = None
self.x = self.y = 0
def showtip(self, text):
"Display text in tooltip window"
self.text = text
if self.tipwindow or not self.text:
return
x, y, cx, cy = self.widget.bbox("insert")
x = x + self.widget.winfo_rootx() + 57
y = y + cy + self.widget.winfo_rooty() +27
self.tipwindow = tw = Toplevel(self.widget)
tw.wm_overrideredirect(1)
tw.wm_geometry("+%d+%d" % (x, y))
label = Label(tw, text=self.text, justify=LEFT,
background="#ffffe0", relief=SOLID, borderwidth=1,
font=("tahoma", "8", "normal"))
label.pack(ipadx=1)
def hidetip(self):
tw = self.tipwindow
self.tipwindow = None
if tw:
tw.destroy()
def CreateToolTip(widget, text):
toolTip = ToolTip(widget)
def enter(event):
toolTip.showtip(text)
def leave(event):
toolTip.hidetip()
widget.bind('<Enter>', enter)
widget.bind('<Leave>', leave)
The widget is where you want to add the tip. For example, if you want the tip when you hover over a button or entry or label, the instance of the same should be provided at the call time.
Quick note: the code above uses from tkinter import *
which is not suggested by some of the programmers out there, and they have valid points. You might want to make necessary changes in such case.
To move the tip to your desired location, you can change x and y in the code.
The function CreateToolTip() helps to create this tip easily. Just pass the widget and string you want to display in the tipbox to this function, and you're good to go.
This is how you call the above part:
button = Button(root, text = 'click mem')
button.pack()
CreateToolTip(button, text = 'Hello World\n'
'This is how tip looks like.'
'Best part is, it\'s not a menu.\n'
'Purely tipbox.')
Do not forget to import the module if you save the previous outline in different python file, and don't save the file as CreateToolTip or ToolTip to avoid confusion.
This post from Fuzzyman shares some similar thoughts, and worth checking out.

You need to set a binding on the <Enter> and <Leave> events.
Note: if you choose to pop up a window (ie: a tooltip) make sure you don't pop it up directly under the mouse. What will happen is that it will cause a leave event to fire because the cursor leaves the label and enters the popup. Then, your leave handler will dismiss the window, your cursor will enter the label, which causes an enter event, which pops up the window, which causes a leave event, which dismisses the window, which causes an enter event, ... ad infinitum.
For simplicity, here's an example that updates a label, similar to a statusbar that some apps use. Creating a tooltip or some other way of displaying the information still starts with the same core technique of binding to <Enter> and <Leave>.
import Tkinter as tk
class Example(tk.Frame):
def __init__(self, *args, **kwargs):
tk.Frame.__init__(self, *args, **kwargs)
self.l1 = tk.Label(self, text="Hover over me")
self.l2 = tk.Label(self, text="", width=40)
self.l1.pack(side="top")
self.l2.pack(side="top", fill="x")
self.l1.bind("<Enter>", self.on_enter)
self.l1.bind("<Leave>", self.on_leave)
def on_enter(self, event):
self.l2.configure(text="Hello world")
def on_leave(self, enter):
self.l2.configure(text="")
if __name__ == "__main__":
root = tk.Tk()
Example(root).pack(side="top", fill="both", expand="true")
root.mainloop()

You can refer to this- HoverClass
It is exactly what you need. Nothing more, nothing less
from Tkinter import *
import re
class HoverInfo(Menu):
def __init__(self, parent, text, command=None):
self._com = command
Menu.__init__(self,parent, tearoff=0)
if not isinstance(text, str):
raise TypeError('Trying to initialise a Hover Menu with a non string type: ' + text.__class__.__name__)
toktext=re.split('\n', text)
for t in toktext:
self.add_command(label = t)
self._displayed=False
self.master.bind("<Enter>",self.Display )
self.master.bind("<Leave>",self.Remove )
def __del__(self):
self.master.unbind("<Enter>")
self.master.unbind("<Leave>")
def Display(self,event):
if not self._displayed:
self._displayed=True
self.post(event.x_root, event.y_root)
if self._com != None:
self.master.unbind_all("<Return>")
self.master.bind_all("<Return>", self.Click)
def Remove(self, event):
if self._displayed:
self._displayed=False
self.unpost()
if self._com != None:
self.unbind_all("<Return>")
def Click(self, event):
self._com()
Example app using HoverInfo:
from Tkinter import *
from HoverInfo import HoverInfo
class MyApp(Frame):
def __init__(self, parent=None):
Frame.__init__(self, parent)
self.grid()
self.lbl = Label(self, text='testing')
self.lbl.grid()
self.hover = HoverInfo(self, 'while hovering press return \n for an exciting msg', self.HelloWorld)
def HelloWorld(self):
print('Hello World')
app = MyApp()
app.master.title('test')
app.mainloop()
Screenshot:

I have a very hacky solution but it has some advantages over the current answers so I figured I would share it.
lab=Label(root,text="hover me")
lab.bind("<Enter>",popup)
def do_popup(event):
# display the popup menu
root.after(1000, self.check)
popup = Menu(root, tearoff=0)
popup.add_command(label="Next")
popup.tk_popup(event.x_root, event.y_root, 0)
def check(event=None):
x, y = root.winfo_pointerxy()
widget = root.winfo_containing(x, y)
if widget is None:
root.after(100, root.check)
else:
leave()
def leave():
popup.delete(0, END)
The only real issue with this is it leaves behind a small box that moves focus away from the main window
If anyone knows how to solve these issues let me know

If anyone is on Mac OSX and tool tip isn't working, check out the example in:
https://github.com/python/cpython/blob/master/Lib/idlelib/tooltip.py
Basically, the two lines that made it work for me on Mac OSX were:
tw.update_idletasks() # Needed on MacOS -- see #34275.
tw.lift() # work around bug in Tk 8.5.18+ (issue #24570)

Here is a simple solution to your problem that subclasses the tk.Button object. We make a special class that tk.Button inherits from, giving it tooltip functionality. The same for tk.Labels.
I don't know what would be cleanest and the easiest way to maintain code for keeping track of the text that goes into the tooltips. I present here one way, in which I pass unique widget IDs to MyButtons, and access a dictionary for storing the tooltip texts. You could store this file as a JSON, or as a class attribute, or as a global variable (as below). Alternatively, perhaps it would be better to define a setter method in MyButton, and just call this method every time you create a new widget that should have a tooltip. Although you would have to store the widget instance in a variable, adding one extra line for all widgets to include.
One drawback in the code below is that the self.master.master syntax relies on determining the "widget depth". A simple recursive function will catch most cases (only needed for entering a widget, since by definition you leave somewhere you once were).
Anyway, below is a working MWE for anyone interested.
import tkinter as tk
tooltips = {
'button_hello': 'Print a greeting message',
'button_quit': 'Quit the program',
'button_insult': 'Print an insult',
'idle': 'Hover over button for help',
'error': 'Widget ID not valid'
}
class ToolTipFunctionality:
def __init__(self, wid):
self.wid = wid
self.widet_depth = 1
self.widget_search_depth = 10
self.bind('<Enter>', lambda event, i=1: self.on_enter(event, i))
self.bind('<Leave>', lambda event: self.on_leave(event))
def on_enter(self, event, i):
if i > self.widget_search_depth:
return
try:
cmd = f'self{".master"*i}.show_tooltip(self.wid)'
eval(cmd)
self.widget_depth = i
except AttributeError:
return self.on_enter(event, i+1)
def on_leave(self, event):
cmd = f'self{".master" * self.widget_depth}.hide_tooltip()'
eval(cmd)
class MyButton(tk.Button, ToolTipFunctionality):
def __init__(self, parent, wid, **kwargs):
tk.Button.__init__(self, parent, **kwargs)
ToolTipFunctionality.__init__(self, wid)
class MyLabel(tk.Label, ToolTipFunctionality):
def __init__(self, parent, wid, **kwargs):
tk.Label.__init__(self, parent, **kwargs)
ToolTipFunctionality.__init__(self, wid)
class Application(tk.Tk):
def __init__(self):
tk.Tk.__init__(self)
self.tooltip = tk.StringVar()
self.tooltip.set(tooltips['idle'])
self.frame = tk.Frame(self, width=50)
self.frame.pack(expand=True)
MyLabel(self.frame, '', text='One Cool Program').pack()
self.subframe = tk.Frame(self.frame, width=40)
self.subframe.pack()
MyButton(self.subframe, 'button_hello', text='Hello!', command=self.greet, width=20).pack()
MyButton(self.subframe, 'button_insutl', text='Insult', command=self.insult, width=20).pack()
MyButton(self.subframe, 'button_quit', text='Quit', command=self.destroy, width=20).pack()
tk.Label(self.subframe, textvar=self.tooltip, width=20).pack()
def show_tooltip(self, wid):
try:
self.tooltip.set(tooltips[wid])
except KeyError:
self.tooltip.set(tooltips['error'])
def hide_tooltip(self):
self.tooltip.set(tooltips['idle'])
def greet(self):
print('Welcome, Fine Sir!')
def insult(self):
print('You must be dead from the neck up')
if __name__ == '__main__':
app = Application()
app.mainloop()

The best way I have found to create a popup help window is to use the tix.Balloon. I have modified it below to make it look better and show an example (note the use of tix.Tk):
import tkinter as tk
import tkinter.tix as tix
class Balloon(tix.Balloon):
# A modified tix popup balloon (to change the default delay, bg and wraplength)
init_after = 1250 # Milliseconds
wraplength = 300 # Pixels
def __init__(self, master):
bg = root.cget("bg")
# Call the parent
super().__init__(master, initwait=self.init_after)
# Change background colour
for i in self.subwidgets_all():
i.config(bg=bg)
# Modify the balloon label
self.message.config(wraplength=self.wraplength)
root = tix.Tk()
l = tk.Label(root, text="\n".join(["text"] * 5))
l.pack()
b = Balloon(root.winfo_toplevel())
b.bind_widget(l, balloonmsg="Some random text")
root.mainloop()
OLD ANSWER:
Here is an example using <enter> and <leave> as #bryanoakley suggested with a toplevel (with overridedirect set to true). Use the hover_timer class for easy use of this. This needs the widget and help-text (with an optional delay argument - default 0.5s) and can be easily called just by initiating the class and then cancelling it.
import threading, time
from tkinter import *
class hover_window (Toplevel):
def __init__ (self, coords, text):
super ().__init__ ()
self.geometry ("+%d+%d" % (coords [0], coords [1]))
self.config (bg = "white")
Label (self, text = text, bg = "white", relief = "ridge", borderwidth = 3, wraplength = 400, justify = "left").grid ()
self.overrideredirect (True)
self.update ()
self.bind ("<Enter>", lambda event: self.destroy ())
class hover_timer:
def __init__ (self, widget, text, delay = 2):
self.wind, self.cancel_var, self.widget, self.text, self.active, self.delay = None, False, widget, text, False, delay
threading.Thread (target = self.start_timer).start ()
def start_timer (self):
self.active = True
time.sleep (self.delay)
if not self.cancel_var: self.wind = hover_window ((self.widget.winfo_rootx (), self.widget.winfo_rooty () + self.widget.winfo_height () + 20), self.text)
self.active = False
def delayed_stop (self):
while self.active: time.sleep (0.05)
if self.wind:
self.wind.destroy ()
self.wind = None
def cancel (self):
self.cancel_var = True
if not self.wind: threading.Thread (target = self.delayed_stop).start ()
else:
self.wind.destroy ()
self.wind = None
def start_help (event):
# Create a new help timer
global h
h = hover_timer (l, "This is some additional information.", 0.5)
def end_help (event):
# If therre is one, end the help timer
if h: h.cancel ()
if __name__ == "__main__":
# Create the tkinter window
root = Tk ()
root.title ("Hover example")
# Help class not created yet
h = None
# Padding round label
Frame (root, width = 50).grid (row = 1, column = 0)
Frame (root, height = 50).grid (row = 0, column = 1)
Frame (root, width = 50).grid (row = 1, column = 2)
Frame (root, height = 50).grid (row = 2, column = 1)
# Setup the label
l = Label (root, text = "Hover over me for information.", font = ("sans", 32))
l.grid (row = 1, column = 1)
l.bind ("<Enter>", start_help)
l.bind ("<Leave>", end_help)
# Tkinter mainloop
root.mainloop ()

I wanted to contribute to the answer of #squareRoot17 as he inspired me to shorten his code while providing the same functionality:
import tkinter as tk
class ToolTip(object):
def __init__(self, widget, text):
self.widget = widget
self.text = text
def enter(event):
self.showTooltip()
def leave(event):
self.hideTooltip()
widget.bind('<Enter>', enter)
widget.bind('<Leave>', leave)
def showTooltip(self):
self.tooltipwindow = tw = tk.Toplevel(self.widget)
tw.wm_overrideredirect(1) # window without border and no normal means of closing
tw.wm_geometry("+{}+{}".format(self.widget.winfo_rootx(), self.widget.winfo_rooty()))
label = tk.Label(tw, text = self.text, background = "#ffffe0", relief = 'solid', borderwidth = 1).pack()
def hideTooltip(self):
tw = self.tooltipwindow
tw.destroy()
self.tooltipwindow = None
This class can then be imported and used as:
import tkinter as tk
from tooltip import ToolTip
root = tk.Tk()
your_widget = tk.Button(root, text = "Hover me!")
ToolTip(widget = your_widget, text = "Hover text!")
root.mainloop()

tkinter app adding a right click context menu?

I have a python-tkinter gui app that I've been trying to find some way to add in some functionality. I was hoping there would be a way to right-click on an item in the app's listbox area and bring up a context menu. Is tkinter able to accomplish this? Would I be better off looking into gtk or some other gui-toolkit?

You would create a Menu instance and write a function that calls
its post() or tk_popup() method.
The tkinter documentation doesn't currently have any information about tk_popup().
Read the Tk documentation for a description, or the source:
library/menu.tcl in the Tcl/Tk source:
::tk_popup --
This procedure pops up a menu and sets things up for traversing
the menu and its submenus.
Arguments:
menu - Name of the menu to be popped up.
x, y - Root coordinates at which to pop up the menu.
entry - Index of a menu entry to center over (x,y).
If omitted or specified as {}, then menu's
upper-left corner goes at (x,y).
tkinter/__init__.py in the Python source:
def tk_popup(self, x, y, entry=""):
"""Post the menu at position X,Y with entry ENTRY."""
self.tk.call('tk_popup', self._w, x, y, entry)
You associate your context menu invoking function with right-click via:
the_widget_clicked_on.bind("<Button-3>", your_function).
However, the number associated with right-click is not the same on every platform.
library/tk.tcl in the Tcl/Tk source:
On Darwin/Aqua, buttons from left to right are 1,3,2.
On Darwin/X11 with recent XQuartz as the X server, they are 1,2,3;
other X servers may differ.
Here is an example I wrote that adds a context menu to a Listbox:
import tkinter # Tkinter -> tkinter in Python 3
class FancyListbox(tkinter.Listbox):
def __init__(self, parent, *args, **kwargs):
tkinter.Listbox.__init__(self, parent, *args, **kwargs)
self.popup_menu = tkinter.Menu(self, tearoff=0)
self.popup_menu.add_command(label="Delete",
command=self.delete_selected)
self.popup_menu.add_command(label="Select All",
command=self.select_all)
self.bind("<Button-3>", self.popup) # Button-2 on Aqua
def popup(self, event):
try:
self.popup_menu.tk_popup(event.x_root, event.y_root, 0)
finally:
self.popup_menu.grab_release()
def delete_selected(self):
for i in self.curselection()[::-1]:
self.delete(i)
def select_all(self):
self.selection_set(0, 'end')
root = tkinter.Tk()
flb = FancyListbox(root, selectmode='multiple')
for n in range(10):
flb.insert('end', n)
flb.pack()
root.mainloop()
The use of grab_release() was observed in an example on effbot.
Its effect might not be the same on all systems.

I made some changes to the conext menu code above in order to adjust my demand and I think it would be useful to share:
Version 1:
import tkinter as tk
from tkinter import ttk
class Main(tk.Frame):
def __init__(self, master):
tk.Frame.__init__(self, master)
master.geometry('500x350')
self.master = master
self.tree = ttk.Treeview(self.master, height=15)
self.tree.pack(fill='x')
self.btn = tk.Button(master, text='click', command=self.clickbtn)
self.btn.pack()
self.aMenu = tk.Menu(master, tearoff=0)
self.aMenu.add_command(label='Delete', command=self.delete)
self.aMenu.add_command(label='Say Hello', command=self.hello)
self.num = 0
# attach popup to treeview widget
self.tree.bind("<Button-3>", self.popup)
def clickbtn(self):
text = 'Hello ' + str(self.num)
self.tree.insert('', 'end', text=text)
self.num += 1
def delete(self):
print(self.tree.focus())
if self.iid:
self.tree.delete(self.iid)
def hello(self):
print ('hello!')
def popup(self, event):
self.iid = self.tree.identify_row(event.y)
if self.iid:
# mouse pointer over item
self.tree.selection_set(self.iid)
self.aMenu.post(event.x_root, event.y_root)
else:
pass
root = tk.Tk()
app=Main(root)
root.mainloop()
Version 2:
import tkinter as tk
from tkinter import ttk
class Main(tk.Frame):
def __init__(self, master):
master.geometry('500x350')
self.master = master
tk.Frame.__init__(self, master)
self.tree = ttk.Treeview(self.master, height=15)
self.tree.pack(fill='x')
self.btn = tk.Button(master, text='click', command=self.clickbtn)
self.btn.pack()
self.rclick = RightClick(self.master)
self.num = 0
# attach popup to treeview widget
self.tree.bind('<Button-3>', self.rclick.popup)
def clickbtn(self):
text = 'Hello ' + str(self.num)
self.tree.insert('', 'end', text=text)
self.num += 1
class RightClick:
def __init__(self, master):
# create a popup menu
self.aMenu = tk.Menu(master, tearoff=0)
self.aMenu.add_command(label='Delete', command=self.delete)
self.aMenu.add_command(label='Say Hello', command=self.hello)
self.tree_item = ''
def delete(self):
if self.tree_item:
app.tree.delete(self.tree_item)
def hello(self):
print ('hello!')
def popup(self, event):
self.aMenu.post(event.x_root, event.y_root)
self.tree_item = app.tree.focus()
root = tk.Tk()
app=Main(root)
root.mainloop()

from tkinter import *
root=Tk()
root.geometry("500x400+200+100")
class Menu_Entry(Entry):
def __init__(self,perant,*args,**kwargs):
Entry.__init__(self,perant,*args,**kwargs)
self.popup_menu=Menu(self,tearoff=0,background='#1c1b1a',fg='white',
activebackground='#534c5c',
activeforeground='Yellow')
self.popup_menu.add_command(label="Cut ",command=self.Cut,
accelerator='Ctrl+V')
self.popup_menu.add_command(label="Copy ",command=self.Copy,compound=LEFT,
accelerator='Ctrl+C')
self.popup_menu.add_command(label="Paste ",command=self.Paste,accelerator='Ctrl+V')
self.popup_menu.add_separator()
self.popup_menu.add_command(label="Select all",command=self.select_all,accelerator="Ctrl+A")
self.popup_menu.add_command(label="Delete",command=self.delete_only,accelerator=" Delete")
self.popup_menu.add_command(label="Delete all",command=self.delete_selected,accelerator="Ctrl+D")
self.bind('<Button-3>',self.popup)
self.bind("<Control-d>",self.delete_selected_with_e1)
self.bind('<App>',self.popup)
self.context_menu = Menu(self, tearoff=0)
self.context_menu.add_command(label="Cut")
self.context_menu.add_command(label="Copy")
self.context_menu.add_command(label="Paste")
def popup(self, event):
try:
self.popup_menu.tk_popup(event.x_root, event.y_root, 0)
finally:
self.popup_menu.grab_release()
def Copy(self):
self.event_generate('<<Copy>>')
def Paste(self):
self.event_generate('<<Paste>>')
def Cut(self):
self.event_generate('<<Cut>>')
def delete_selected_with_e1(self,event):
self.select_range(0, END)
self.focus()
self.event_generate("<Delete>")
def delete_selected(self):
self.select_range(0, END)
self.focus()
self.event_generate("<Delete>")
def delete_only(self):
self.event_generate("<BackSpace>")
def select_all(self):
self.select_range(0, END)
self.focus()
ent=Menu_Entry(root)
ent.pack()
root.mainloop()

Important Caveat:
(Assuming the event argument that contains the coordinates is called "event"): Nothing will happen or be visible when you call tk_popup(...) unless you use "event.x_root" and "event.y_root" as arguments. If you do the obvious of using "event.x" and "event.y", it won't work, even though the names of the coordinates are "x" and "y" and there is no mention of "x_root" and "y_root" anywhere within it.
As for the grab_release(..), it's not necessary, anywhere. "tearoff=0" also isn't necessary, setting it to 1 (which is default), simply adds a dotted line entry to the context menu. If you click on it, it detaches the context menu and makes it its own top-level window with window decorators. tearoff=0 will hide this entry. Moreover, it doesn't matter if you set the menu's master to any specific widget or root, or anything at all.

Creating a popup message box with an Entry field

I want to create a popup message box which prompts user to enter an input. I have this method inside a class. I am basing my code on this guide by java2s.
class MyDialog:
def __init__(self, parent):
top = self.top = Toplevel(parent)
Label(top, text="Value").pack()
self.e = Entry(top)
self.e.pack(padx=5)
b = Button(top, text="OK", command=self.ok)
b.pack(pady=5)
def ok(self):
print "value is", self.e.get()
self.top.destroy()
root = Tk()
d = MyDialog(root)
root.wait_window(d.top)
But in this, top = self.top = Toplevel(parent) doesn't work for me.
I have a mockup of what I am trying to accomplish.
My program structure looks something like this:
class MainUI:
def__int__(self):
...
self.initUI()
def initUI(self):
.......
Popup = Button(self, text="Enter Value", command=self.showPopup)
def showPopup(self):
#create the popup with an Entry here
How can I create a message box in Python which accepts user input?

I'm a little confused about your two different blocks of code. Just addressing the first block of code, nothing happens because you never enter the mainloop. To do that, you need to call root.mainloop(). The typical way of doing this is to add a button to root widget and bind a callback function to the Button (which includes d=MyDialog() and root.wait_window(d.top))
Here's some basic code which I hope does what you want ...
from Tkinter import *
import sys
class popupWindow(object):
def __init__(self,master):
top=self.top=Toplevel(master)
self.l=Label(top,text="Hello World")
self.l.pack()
self.e=Entry(top)
self.e.pack()
self.b=Button(top,text='Ok',command=self.cleanup)
self.b.pack()
def cleanup(self):
self.value=self.e.get()
self.top.destroy()
class mainWindow(object):
def __init__(self,master):
self.master=master
self.b=Button(master,text="click me!",command=self.popup)
self.b.pack()
self.b2=Button(master,text="print value",command=lambda: sys.stdout.write(self.entryValue()+'\n'))
self.b2.pack()
def popup(self):
self.w=popupWindow(self.master)
self.b["state"] = "disabled"
self.master.wait_window(self.w.top)
self.b["state"] = "normal"
def entryValue(self):
return self.w.value
if __name__ == "__main__":
root=Tk()
m=mainWindow(root)
root.mainloop()
I get the value from the popupWindow and use it in the main program (take a look at the lambda function associated with b2).
Main window:
"Click me" window:
Main window while "click me" is open:

import tkinter as tk
from tkinter import simpledialog
ROOT = tk.Tk()
ROOT.withdraw()
# the input dialog
USER_INP = simpledialog.askstring(title="Test",
prompt="What's your Name?:")
# check it out
print("Hello", USER_INP)
Enjoy ...

I did it in Tkinter without any classes. I created a function that starts a new window.
popup.Tk()
popup.mainloop()
In that window there is an Entry field from where I get the text with a variable which value is: entry.get()
Then you can use that variable for whatever you need and it will take the text from that Entry field.

I just tried this:
def get_me():
s = simpledialog.askstring("input string", "please input your added text")
Source: https://www.youtube.com/watch?v=43vzP1FyAF8