Button Callback function with arguments auto run

[wsimm]

Hi,
when I create a button with a callback function with arguments it auto runs the function assigned

`from vanilla import Window, Button

class ButtonDemo:

 def __init__(self):
     self.w = Window((100, 40))
     self.w.button = Button((10, 10, -10, 20), "A Button",
                        callback=self.buttonCallback('somedata'))
     self.w.open()

 def buttonCallback(self, sender):
     print("button hit!")

ButtonDemo()`

[justvanrossum]

You have to assign the callback without the ('somedata') bit (which is calling it on the spot).

from vanilla import Window, Button

class ButtonDemo:

 def __init__(self):
     self.w = Window((100, 40))
     self.w.button = Button((10, 10, -10, 20), "A Button",
                        callback=self.buttonCallback)
     self.w.open()

 def buttonCallback(self, sender):
     print("button hit!")

ButtonDemo()

[wsimm]

how to pass some data through the arguments ?

[justvanrossum]

The callback is called by vanilla, and it passes the "sender" argument. You don't pass it arguments yourself.

What are you trying to do?