Weird textbutton action bug

[jeffc]

So I created a simple test shopping screen with one "Buy" textbutton for buying things.
The buyItem function is supposed to be called only when the textbutton is clicked, but somehow the textbutton's action is triggered automatically the moment the screen is shown, even though the textbutton was never clicked.
I know for certain that the function was called because some variables that I watch in the debug console changed in value when the screen is called.

The screen is shown using the call screen statement:

Code: Select all

call screen test

The screen code:

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screen test:
    add "#000"
    modal True
    default button_caption = "Buy"
    vbox:
        textbutton "[button_caption]" action [SetScreenVariable("button_caption","Bought"),buyItem(shopping_item_code, 20)]
        textbutton "Back" action [Hide("test"),Return]

And the main python script:

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init python:
    def buyItem(itemCode, itemCost):
    	#change some variable values

Am I missing something here? I thought handling textbutton clicks are supposed to be straightforward, but I can't figure out what is causing the problem.

[Remix]

Use the action "Function()"

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textbutton "[button_caption]" action [SetScreenVariable("button_caption","Bought"), Function( buyItem, shopping_item_code, 20 ) ]

[jeffc]

Thanks Remix for your suggestion. It works perfectly now.
Man, the official documentation really should highlight these kinds of small nuances in the code. There's no mention of Function in the Screens and Screen Language page.

[irredeemable]

https://www.renpy.org/doc/html/screen_a ... l#Function