[PyQt] how to close a dialog during initialisation

[Mirage Web Studio]

On 2015-04-05 8:37 PM, David Cortesi wrote:
>
>     I want to close a Qdialog during its initialisation i.e. inside def
>     __init__.  I do some computing during the initialisation of a dialog.
>     if they don't return a particular value i wish to close the dialog
>     inside the init statement is it possible or is there a way i can
>     achieve it.
>
> One way would be to raise an exception inside __init__().
>
> class myOddDialog(QDialog):
>     def __init__(parent):
>         if something_is_wrong :
>             raise ValueError
>
> And then create it inside a try:
>
>     try:
>         odd_dialog = myOddDialog(self)
>         response = odd_dialog.exec_()
>     except:
>         response = failure_value
>
> But this is very peculiar. Anything that the dialog could figure out 
> during __init__(), the parent code could also figure out before it 
> creates the dialog or shows the dialog. So I would just test for the 
> bad condition in the main code and only display the dialog (call its 
> .exec_() method) when the condition was good.
>
> Also be aware of the nice "canned" dialogs available as static methods 
> of QMessageBox, such as question(), warning() and so on. Read the doc 
> for QMessageBox, it can save you a lot of effort.
>
>

Thank you.

Your solution works for me.

I agree with your statement, but i am trying to build multi dialog 
application without a MDI, it just so seems fit to do computations 
regarding a problem within the concerned dialog. And if no permissible 
results exit just stop the dialog and return.  Thinking of other 
solutions like taking the initial computation outside the dialog init i 
think is too much coding and tracking for errors so just trying to keep 
the related bunch together.


George



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