tk: how to invoke it just to display something, and return to the main program?
- by max
Sorry for the noob question but I really don't understand this.
I'm using python / tkinter and I want to display something (say, a canvas with a few shapes on it), and keep it displayed until the program quits. I understand that no widgets would be displayed until I call tkinter.tk.mainloop(). However, if I call tkinter.tk.mainloop(), I won't be able to do anything else until the user closes the main window.
I don't need to monitor any user input events, just display some stuff. What's a good way to do this without giving up control to mainloop?
EDIT:
Is this sample code reasonable:
class App(tk.Tk):
def __init__(self, sim):
self.sim = sim # link to the simulation instance
self.loop()
def loop():
self.redraw() # update all the GUI to reflect new simulation state
sim.next_step() # advance simulation another step
self.after(0, self.loop)
def redraw():
# get whatever we need from self.sim, and put it on the screen
EDIT2 (added after_idle):
class App(tk.Tk):
def __init__(self, sim):
self.sim = sim # link to the simulation instance
self.after_idle(self.preloop)
def preloop():
self.after(0, self.loop)
def loop():
self.redraw() # update all the GUI to reflect new simulation state
sim.next_step() # advance simulation another step
self.after_idle(self.preloop)
def redraw():
# get whatever we need from self.sim, and put it on the screen
