Re: Focus issue

To answer my own question: the focus was being given to another widget after the code in question had executed.

That said, I still don't understand why focus_set followed by update_idletasks followed by focus_get would return None, but tkinter something works in strange and mysterious ways.

Cheers

Cam

On 2024-01-10 08:44, Cam Farnell wrote:
> In a rather large program I have this code:
> 
> self.TextWidget.focus_set()
> print("type(self.TextWidget)=%s"%type(self.TextWidget))
> print('Focus_get()=%s'%self.focus_get())
> 
> The goal is to have TextWidget get the focus. Usually it does, but there is one particular circumstance when it does not get the focus. The "print" lines I added for debugging.
> 
> The output from the print functions is:
> 
> type(self.TextWidget)=<class 'rpWidgets.ColorizedText'>
> Focus_get()=None
> 
> TextWidget is an instance of rpWidgets.ColorizedText which is created thus:
> 
> class ColorizedText(tkinter.Text):
> 
> which is to say, it's just a tkinter.Text to which I've added methods.
> 
> I've tried creating a minimum example without success.
> 
> My questions is: how is it possible for TextWidget to NOT have the focus immediately after a call to focus_set?
> 
> Changing focus_set to focus_force makes no difference.
> 
> Invoking update_idletasks() after the focus_set makes no difference.
> 
> The TextWidget in question is visible on the screen, and pressing Tab a couple of times does get it the focus.
> 
> Having spent some hours chasing this I'm a tad frustrated, but quite open to suggestions about what to look for.
> 
> Cheers
> 
> Cam Farnell
> 
> 
> 
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