[Qt-interest] QWizardPage::wizard() overprotected?

[Anthony Serdyukov]

I'd suggest you to use signals and slots, it can help you connect
objects that doesn't know about each other.

2008/12/11, Niels Dekker - no return address <noreply at this.is.invalid>:
> Scott Aron Bloom wrote:
>> Since your deriving from WizardPage anyway.. why not just overload
>> wizard() and make it public?
>
> Thanks for your reply.  So you say I'd have to override wizard() on all of
> my
> derived WizardPage classes, to make it public.  But then why wasn't it
> public
> in the first place?  I mean, what does Qt protect me against?
>
>> That said, why do you need access to the wizard outside of the
>> WizardPage?
>
> >From within any of my pages, I need to find my way back to the status bar
> of
> my wizard.  Unfortunately, a QWizard cannot have a status bar, so I had to
> put
> it onto a QMainWindow.  Anyway, to avoid code duplication, I wrote a single
> function to get the status bar belonging to my wizard:
>
>   // Returns the status bar, specific to my application.
>   QStatusBar& getStatusBar(const QWizardPage& page)
>   {
>     // Get the "protected" wizard from the page.
>     const QWizard* const wizard = getWizard(page);
>     assert(wizard != NULL);
>
>     // My wizard has a QMainWindow as parent.
>     const QMainWindow* const mainWindow =
>       dynamic_cast<const QMainWindow *>(wizard->parent());
>     assert(mainWindow != NULL);
>
>     QStatusBar* statusBar = mainWindow->statusBar();
>     assert(statusBar != NULL);
>     return *statusBar;
>   }
>
>
> Now I can directly get the status bar, from within any of my pages:
>   getStatusBar(*this).showMessage(tr("Status okay!"));
>
> Doesn't that sound reasonable to you?
>
> Kind regards,
> --
> Niels Dekker
> http://www.xs4all.nl/~nd/dekkerware
> Scientific programmer at LKEB, Leiden University Medical Center
>
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-- 
Regards,
Anthony