Widgets disappear after tkMessageBox in Tkinter.

Question

Every time I use this code in my applications:

tkMessageBox.showinfo("Test", "Info goes here!")

a message box pops up (like it is supposed to), but after I click OK, the box disappears along with most of the other widgets on the window. How do I prevent the other widgets from disappearing?

---

Here Is My Code:

from Tkinter import *
import tkMessageBox
root = Tk()
root.minsize(600,600)
root.maxsize(600,600)
p1 = Label(root, bg='blue')
p1.place(width=600, height=600)
b1 = Button(p1, text="Test Button")
b1.place(x="30", y="50")
tkMessageBox.showinfo("Test", Info")
root.mainloop()

Answer 1

Ok, there are a few things going wrong here. First, your label has no string or image associated with it. Therefore, it's width and height will be very small. Because you use pack, the containing widget (the root window) will "shrink to fit" around this widget and any other widgets you pack in the root window.

Second, you use place for the button which means its size will not affect the size of the parent. Not only that, but you place the button inside the very tiny label. Thus, the only thing controlling the size of the parent is the label so the main window ends up being very small.

You have another problem is that you're showing the dialog before entering the event loop. I'm a bit surprised that it even works, but Tkinter sometimes does unusual things under the covers. You should enter the event loop before calling the dialog.

Try this variation of your code as a starting point:

from Tkinter import *
import tkMessageBox
def showInfo():
    tkMessageBox.showinfo("Test","Info")

root = Tk()
p1 = Label(root, bg='blue', text="hello")
p1.pack()
b1 = Button(root, text="Test Button", command=showInfo)
b1.pack()
root.mainloop()