I want to write a program with a window set to always at the top and without the border. So I write the following program, which doesn't work as intended (macOS Sierra, 10.12.3):
import tkinter as tk
root=tk.Tk()
tk.Label(root,text='some text').pack()
root.attributes('-topmost',True)
root.overrideredirect(1)
root.mainloop() #this one doesn't work
screenshot of the failed one
However, when I change the sequence of overridedirect and attributes, surprisingly it worked.
import tkinter as tk
root=tk.Tk()
tk.Label(root,text='some text').pack()
root.overrideredirect(1)
root.attributes('-topmost',True)
root.mainloop() #this one works
screenshot of the successful one
Can someone please tell me why the sequence of those two lines matters?
Related
I'm somewhat new to python (started in Nov.) and after complete my first "program" I'm trying to built the GUI using Tkinter. I want to put the program on a Toplevel that I've created and have it run, but all Tkinter tutorials only talk about widgets and I don't know how to specify that a code should run on a specific Toplevel window. The best I can figure is to run the in the section where I define the Toplevel as shown in the example below, but that is not working.
from tkinter import *
import tkinter as tk
root=Tk()
root.geometry("500x200")
root.title('Test')
Label(root, text="Test").pack()
def test():
gen_win = Toplevel(root)
gen_win.title("Test")
gen_win.geometry("500x500")
Label(gen_win, text="Test").pack()
print(2+2)
btn_test=tk.Button(root, text="test", command=test).pack(fill=tk.X)
root.mainloop()
The example program (print(2+2)) doesn't print on the toplevel. Any ideas?
#jasonharper gave the correct answer:
"Code doesn't "run on a specific Toplevel window". It just runs, and if it happens to create a widget, or modify the contents of an existing widget, that change becomes visible as soon as your code returns to the mainloop. Label(gen_win, text=str(2+2)).pack() would be the simplest way to make your addition results visible in the window."
Code:
from tkinter import *
from tkinter import ttk
root=Tk()
# creating the main frame
main_frame=Frame(root)
main_frame.pack(fill=BOTH,expand=1)
mycanvas=Canvas(main_frame)
mycanvas.pack(side=LEFT,fill=BOTH,expand=1)
myscrollbar=Scrollbar(main_frame,orient=VERTICAL,command=mycanvas.yview)
myscrollbar.pack(side=RIGHT,fill=Y)
mycanvas.configure(yscrollcommand=myscrollbar.set)
mycanvas.bind("<Configure>",lambda e: mycanvas.configure(scrollregion=mycanvas.bbox("all")))
secondframe=Frame(mycanvas)
mycanvas.create_window((0,0),window=secondframe,anchor="nw")
labell=Label(secondframe,text="run this")
labell.grid(row=3,column=4)
root.mainloop()
Output:
Everything is working fine, except that dragable part to scroll. Please help me with that
This code will work just fine, all you have to do is have more items in the frame such that it needs to have be full to be dragged. To see it for yourself, change your label with:
for a in range(50):
Label(secondframe,text=a).grid(row=a,column=4)
You will notice the scrollbar can be used now. Without having alot of "items", there is no need for a y-scrollbar and hence it is grayed out.
This is my first post on here, so bear with me as far as post etiquette goes. I've been struggling to get rid of the base Tkinter window that appears when I'm using the askopenfilename function of Tkinter. I've tried using Withdraw and destroy (in combination and alone) to fix this issue, but it seems to leave my code stuck in a loop and unable to continue to the next sections.
I have seen several solutions to this in Python 2, but I have no idea how they translate to python 3. Tkinter isn't a module I have a lot of experience with, so it is likely a simple oversight I am making.
Any suggestions or comments are much appreciated
Here is a sample of my code I am using (CSV module is for another section of my code)
import csv
from tkinter import filedialog
from tkinter import *
root= Tk()
root.filename= filedialog.askopenfilename(initialdir = r"\Users",title="Select A File", filetypes= [("Csv Files","*.csv")])
root.mainloop()
Use withdraw to hide root window, deiconify to show root window
import csv
from tkinter import filedialog
from tkinter import *
root=Tk()
# Hide Window
root.withdraw()
filename= filedialog.askopenfilename(initialdir = r"\Users",title="Select A File", filetypes= [("Csv Files","*.csv")])
# Show Window
root.deiconify()
root.mainloop()
I'm running python 3 code in background which should show a popup window in some situations. I'm using tkinter for this:
import tkinter as tk
from tkinter import messagebox
def popup(message, title=None):
root = tk.Tk()
root.withdraw()
root.wm_attributes("-topmost", 1)
messagebox.showinfo(title, message, parent=root)
root.destroy()
popup('foo')
The ok-button in this infobox should get the focus automatically when popping up. Sadly I'm not able to do this. I tried root.focus(), but it does not help. Any ideas how to solve that? TIA
BTW: The code should be platform independent (Linux and Windows).
Edit:
Maybe I missunderstood the focus keyword and I should clarify my question:
root = tk.Tk()
root.focus_force()
root.wait_window()
When calling the code above the root window is active, even if I worked in e.g. the browser before. Is this also possible for messagebox.showinfo? Adding root.focus_force() in the popup function does not help.
Is this even possible? Or is it necessary to create my own root window? I really like the appearance of the messagebox with the icon.
Edit 2:
Here is a video: https://filebin.net/no195o9rjy3qq5c4/focus.mp4
The editor is the active window, even after the popup was shown.
In Linux I it works as expected.
You can use the default argument in the messagebox function.
default constant
Which button to make default: ABORT, RETRY, IGNORE, OK, CANCEL, YES, or NO (the constants are defined in the tkMessageBox module).
So, here is an example to highlight the "ok" button.
import tkinter as tk
from tkinter import messagebox
def popup(message, title=None):
root = tk.Tk()
root.withdraw()
messagebox.showinfo(title, message, parent=root, default = "ok")
root.destroy()
popup('foo')
Hope this helps!
In the code below, the first dialog box gets focus immediately, so the user can just type an answer and press enter. In the second one, that doesn't seem to happen when running in Windows. Running Raspbian 9, both windows get focus when they open.
Is there any way I can get both windows to get focus when they open in Windows?
import tkinter as tk
from tkinter import simpledialog
root = tk.Tk()
root.withdraw()
answer1 = simpledialog.askstring("Test1","This one gets focus when it opens",parent=root)
answer2 = simpledialog.askstring("Test2","This one doesn't",parent=root)
I have watched this question for a few days now hoping someone might shed some light on this issue. I'm running Python 3.6.5 under windows 10 and get the same problem.
I have tried several different things but it seems Microsoft does things their own way. I have finally found a thing that works, but only if you don't hide the root window:
import tkinter as tk
from tkinter import simpledialog
root = tk.Tk()
#root.withdraw() # This does not work if you hide the root window
root.update_idletasks()
answer1 = simpledialog.askstring("Test1","This one gets focus",parent=root)
root.update_idletasks()
answer2 = simpledialog.askstring("Test2","This one doesn't",parent=root)
I found the following worked (with a small flicker of the root window on destroy()):
root = tk.Tk()
root.withdraw()
filename = filedialog.askopenfilename()
root.deiconify()
root.destroy()