Though you’re running a subsidiary event loop (really don’t do that!) it still shares the same registry of event handlers as the outer loop, so events coming in are handled in the inner loop just as in the outer one. (There’s a common piece of low-level event handling code that reaches deep into the OS … Read more
In a tkinter application, StringVar (as well as IntVar, BooleanVar, and DoubleVar) are very rarely needed. The underlying tcl/tk interpreter provides special features for all of its variables, so these wrappers exist to take advantage of those features. The two big advantages that these variables have are: You can associate one variable with more than … Read more
To make a gridded layout have all columns have the same width, you’ve got to configure those columns to have the same weight and to be in the same uniform group. This configuration is associated with the master widget, not any of the contained widgets (because columns can contain many widgets, of course). In standard … Read more
On Windows Step One: Create a transparent icon using either an icon editor, or a site like rw-designer. Save it as transparent.ico. Step Two: from tkinter import * tk = Tk() tk.iconbitmap(default=”transparent.ico”) lab = Label(tk, text=”Window with transparent icon.”) lab.pack() tk.mainloop() On Unix Something similar, but using an xbm icon.
tcltk is not a typical package. It’s probably already installed on your system and it cannot be installed using the usual install.packages procedure because it is not on CRAN (just like the base packages that come with R, like stats, etc.). Also, tcltk2 is not the same as tcltk; that is a package that expands … Read more
You can move an item on a canvas using the coords and/or move methods to change the coordinates from what they are to what you want them to be. Here’s a simple example showing how to create and move an item on a canvas: import tkinter as tk # python 3 # import Tkinter as … Read more
Probably the vast majority of of tk-based applications place all the components in the default root window. This is the most convenient way to do it since it already exists. Choosing to hide the default window and create your own is a perfectly fine thing to do, though it requires just a tiny bit of … Read more
Why is it considered bad to have multiple instances of Tk? Tkinter is just a python wrapper around an embedded Tcl interpreter that imports the Tk library. When you create a root window, you create an instance of a Tcl interpreter. Each Tcl interpreter is an isolated sandbox. An object in one sandbox cannot interact … Read more