I have a Python Program that opens a Toplevel window which is working I just wanted to know if there is an option to set the Toplevel window window to be active once it has been opened because at the moment it is still showing the parent window as the active window after opening it.
The python code (Python 3.4.1)
from tkinter import *
class cl_gui:
def __init__(self, master):
master.title("DataBox")
menu = Menu(master)
master.config(menu=menu)
menu_users = Menu(menu, tearoff=0)
menu.add_cascade(label="Users", menu=menu_users)
menu_users.add_command(label="View", command=self.f_openUsers)
def f_openUsers(self):
top = Toplevel()
top.title("Users")
root = Tk()
app = cl_gui(root)
root.mainloop()
You can set focus onto the new Toplevel widget as follows:
def f_openUsers(self):
top = Toplevel()
top.title("Users")
top.focus_set() # <- add this line
See e.g. this handy tkinter guide.
Related
I have a tkinter app with a Toplevel widget that I want to create when the window is starting. The issue I have is that the Toplevel window always ends up behind the main window. Is there a way to force it in front of the root window?
To expand on #acw1668's comment, here's an example of how to create a transient window that sits on top of the root window. Note that a transient window will only have a close button [X], and no minimize / maximize buttons.
import tkinter as tk
from tkinter import ttk
class App(tk.Tk):
def __init__(self):
super().__init__()
self.new_window_button = ttk.Button(
self,
text='Open New Window',
command=self.new_window,
)
self.new_window_button.pack()
def new_window(self):
self.dialog_window = tk.Toplevel(self)
self.dialog_window.transient(self) # place this window on top of the root window
if __name__ == '__main__':
app = App()
app.mainloop()
One important thing to consider is that you might want to prevent the user from interacting with the root window while the dialog is open. Otherwise, in the case of this example, the user could keep clicking the button and spawning new windows. You can do this by calling grab_set() on the dialog (thanks #acw1668 for reminding me)
def new_window(self):
self.dialog_window = tk.Toplevel(self)
self.dialog_window.transient(self) # place this window on top of the root window
self.dialog_window.grab_set() # hold focus
Is there any way to disable all windows when a messagebox popup is created in tkinter?
Here's the code:
from tkinter import *
from tkinter import messagebox
def show():
messagebox.showinfo("Test Popup", "Hello world")
root = Tk()
root.title("Main Window")
root.geometry("500x500")
toplevel = Toplevel(root)
toplevel.title("Toplevel Window")
toplevel.geometry("300x300")
show_button = Button(root , text = "Show popup" , command = show)
show_button.place(x = 200 , y = 200)
mainloop()
Here when the messagebox pops up, I don't want the user to be able to interact with any other Tk or Toplevel windows until that popup is destroyed.
(I tried using the parent attribute of the messagebox, but it only disables one window.)
Is there any way to achieve this in tkinter?
It would be great if anyone could help me out.
I don't think it is possible to prevent all interactions with the windows like moving them around (except if you use .overrideredirect(True) which will make the window decoration disappear and the widow will stop being handled by the window manager).
However, it is possible to
prevent the toplevel to come on top of the popup
disable the "close" button of both the root window and toplevel when the popup is displayed
For both I use the following general idea in show():
def show():
# modify state of root and toplevel to make them less interactive
# ...
messagebox.showinfo("Test Popup", "Hello world", parent=root)
# put root and toplevel back in their normal state
# ...
For 1. I use root.attributes('-topmost', True) before displaying the popup, which inherits this property from root and therefore will stay on top of toplevel.
For 2. I use window.protocol("WM_DELETE_WINDOW", lambda: quit(window)) which calls quit(window) when the user clicks on the close button of window. In quit(), I check whether the popup is opened before destroying the window:
def quit(window):
if not popup:
window.destroy()
popup is a global variable which value is changed in show().
Full code:
import tkinter as tk
from tkinter import messagebox
def quit(window):
if not popup: # destroy the window only if popup is not displayed
window.destroy()
def show():
global popup
popup = True
root.attributes('-topmost', True)
messagebox.showinfo("Test Popup", "Hello world", parent=root)
root.attributes('-topmost', False)
popup = False
root = tk.Tk()
popup = False
root.protocol("WM_DELETE_WINDOW", lambda: quit(root))
root.title("Main Window")
root.geometry("500x500")
toplevel = tk.Toplevel(root)
toplevel.protocol("WM_DELETE_WINDOW", lambda: quit(toplevel))
toplevel.title("Toplevel Window")
show_button = tk.Button(root, text="Show popup", command=show)
show_button.pack()
root.mainloop()
You can probably add some more stuff in show(), e.g. .resizable(False, False) if you don't want the user to be able to resize the windows when the popup is displayed.
After experimenting for a few days, I finally found the solution.
The basic idea here is to get all the child widgets of a window, check whether the child is an instance of Tk or Toplevel, and apply the -disabled attribute to them.
Here's the implementation:
from tkinter import *
from tkinter import messagebox
def disable_windows(window):
for child in window.winfo_children(): # Get all the child widgets of the window
if isinstance(child, Tk) or isinstance(child, Toplevel): # Check if the child is a Tk or Toplevel window so that we can disable them
child.attributes('-disabled', True)
disable_windows(child)
def enable_windows(window):
for child in window.winfo_children(): # Get all the child widgets of the window
if isinstance(child , Tk) or isinstance(child , Toplevel): # Check if the child is a Tk or Toplevel window so that we can enable them
child.attributes('-disabled' , False)
enable_windows(child)
def increase_popup_count():
global popup_count
popup_count += 1
if popup_count > 0: # Check if a popup is currently active so that we can disable the windows
disable_windows(root)
else: # Enable the windows if there is no active popup
enable_windows(root)
def decrease_popup_count():
global popup_count
popup_count -= 1
if popup_count > 0: # Check if a popup is currently active so that we can disable the windows
disable_windows(root)
else: # Enable the windows if there is no active popup
enable_windows(root)
def showinfo(title, message): # A custom showinfo funtion
increase_popup_count() # Increase the 'popup_count' when the messagebox shows up
messagebox.showinfo(title , message)
decrease_popup_count() # Decrease the 'popup_count' after the messagebox is destroyed
def show():
showinfo("Test Popup", "Hello world")
root = Tk()
root.title("Main Window")
root.geometry("500x500")
popup_count = 0
toplevel = Toplevel(root)
toplevel.title("Toplevel Window")
toplevel.geometry("400x400")
toplevel_2 = Toplevel(toplevel)
toplevel_2.title("Toplevel Window of Another Toplevel")
toplevel_2.geometry("300x300")
show_button = Button(root , text = "Show popup" , command = show)
show_button.place(x = 200 , y = 200)
mainloop()
I have programmed a 2600 lines application which worked great when running from the IDE. Now I have created an executable via Pyinstaller and now the GUI does not start. The application starts and disappears quickly. I do not get any errors (anymore, solved them), however this problem remains. I think it has to do with missing the mainloop() in my application, which I don't know how to apply in this particular case. Usually its like this:
root = tk.Tk()
root.mainloop()
In my case I created a class for my window adding a menubar and label as statusbar (the latter not shown in my code below). This makes me assigning this class being a Tk() to main_window. Where do I put the mainloop() without getting an error?
I already tried:
main_window.mainloop()
since main_window is the window where all frames put on to, but then I get the following error in the IDE:
main_window.mainloop() AttributeError: 'AppWindow' object has no attribute 'mainloop'
How do I apply the mainloop() into my application without getting the above mentioned error? Or how do I get my GUI to be working in a different manner? Both answers are welcome.
Here is the necessary code to know:
import tkinter as tk
class AppWindow():
def __init__(self, master):
self.master = master
master.title("Basic Application")
master.geometry("1060x680")
master.grid_propagate(False)
#create drop down menu
self.menubar = tk.Menu(master) # main menubar
#Add filemenu
self.filemenu = tk.Menu(self.menubar, tearoff=0) #sub menu
self.filemenu.add_separator() #create a bar in the menu
self.filemenu.add_command(label="Quit", command=master.destroy) #Add submenu item
self.menubar.add_cascade(label="File", menu=self.filemenu) #Add submenu to menubar
self.master.config(menu=self.menubar) #Show menu
class FrameOne(tk.Frame):
def __init__(self, parent):
super().__init__()
self["borderwidth"]=5
self["relief"]="ridge"
self.create_widgets() #Function which creates all widgets
self.position_widgets() #Function which position all widgets
def create_widgets(self): #Function which creates all widgets
pass
def position_widgets(self): #Function which position all widgets
pass
#Create a window as defined in the AppWindow class
main_window = AppWindow(tk.Tk())
#Create a Frame as defined in class FrameOne
first_frame = FrameOne(main_window)
first_frame.grid(row=0, column=0) #Positioning Frame on Window
main_window.mainloop() #THIS PROVIDES AN ERROR | GUI DOES NOT START WITHOUT
mainloop is a method on the tkinter root window and on tkinter itself. Like the error says, it's not a method of your AppWindow class.
In your case you should do it like this:
root = tk.Tk()
main_window = AppWindow(root)
root.mainloop()
I am trying to create a dialog just like VC++ dlg.DoModal() did.
I have created a parent dialog for my main UI with a 'button_A' on it.
After I click on the 'button_A' on main UI, it will create a child dialog.
Now I have 2 dialog, parent and child. My problem is the child dialog will be covered by parent dialog if I click on parent dialog. Is there any way to make child dialog always on top event I click on parent dialog?
# python 2.7
import Tkinter as tk
import tkFont
from Tkinter import IntVar
from Tkinter import *
class MyGUI():
def __init__(self, master):
self.master = master
## Set the focus on dialog window (needed on Windows)
master.focus_set()
## Make sure events only go to our dialog
master.grab_set()
def start_test():
handle = tk.Toplevel(root)
my_login_dialog = MyGUI(handle)
handle.wait_window(handle)
root = tk.Tk()
root.title('')
root.geometry('1024x768')
ft1 = tkFont.Font(size = 10,weight = 'bold')
tk.Button(root,text = 'Button_A',bg = 'white',height = 1,width = 8,font = ft1,
command = start_test).place(x = 50,y = 10)
root.mainloop()
This question already has an answer here:
How to make Menu.add_command() work in tkinter on the Mac?
(1 answer)
Closed 7 years ago.
I'm trying to use the Tinker Menu widget, unsuccessfully. The very simple program I found at http://effbot.org/tkinterbook/menu.htm produces an empty window with no menu bar. This is the complete program:
from Tkinter import *
root = Tk()
def hello():
print "hello!"
# create a toplevel menu
menubar = Menu(root)
menubar.add_command(label="Hello!", command=hello)
menubar.add_command(label="Quit!", command=root.quit)
# display the menu
root.config(menu=menubar)
root.mainloop()
Any clue? I'm running OS X 10.9.5
I've done more reading on the subject. In Unix and Windows the menu appears at the top of the main window. In OS X, it should appear at the top of the screen (i.e., where people would expect it). In my case, the top of the screen only shows the Python menu.
This works for me not sure if this is what you are trying to do. If you want like a menu bar you make them a cascade menu. I always do Tkinter as a class.
try:
from Tkinter import * # for Python2
except ImportError:
from tkinter import * # for Python3
root = Tk()
class Application():
def __init__(self,master):
master.geometry('400x300+200+200') # Sets Screen Geometry
master.title("Test Window") # Windows Title
self.menu = Menu(master,tearoff=0)
master.config(menu=self.menu)
self.subMenu = Menu(self.menu)
self.menu.add_cascade(label="File", menu=self.subMenu) #Main Menu
self.subMenu.add_command(label="Hello",command=self.Hello) #Submenus under File
self.subMenu.add_command(label="Quit",command=master.quit)
def Hello(self):
print("Hello")
Application(root)
root.mainloop()