How to transfer data entered in a QWizard to other classes?

[wysota]

You can do it any way you see fit. C++ allows for many solutions to this problem. For instance each page has a pointer to the wizard object it is part of.

[BillGates]

"For instance each page has a pointer to the wizard object it is part of. "

you mean wizard() ?

class myWizard : public QWizard
 {
     Q_OBJECT
 
 public:
          whatever*     m_member;
}
 
 
in the myWizard constructor i do :
addPage( new myPage1(           )       );
 
 
 
 
 
myPage1::mypage1(QWidget *parent) : QWizardPage(parent) {
 
wizard()->m_member ? (is this supposed to work?) (apparently it doesnt) (thats basically what i want :D )
 
}

class myWizard : public QWizard
 {
     Q_OBJECT

 public:
          whatever*     m_member;
}


in the myWizard constructor i do :
addPage( new myPage1(           )       );





myPage1::mypage1(QWidget *parent) : QWizardPage(parent) {

wizard()->m_member ? (is this supposed to work?) (apparently it doesnt) (thats basically what i want :D )

}

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Can I reimplement ::next ? http://doc.trolltech.com/4.5/qwizard.html#next [slot] (doesnt say virtual, but I'm no c++ expert)

I do realise your time is more precious than mine, so I *am* thankful.

[wysota]

"For instance each page has a pointer to the wizard object it is part of. "

you mean wizard() ?

Yes, you can cast it to a proper type and use your methods.

MyWizard *wiz = qobject_cast<MyWizard*>(wizard()); // or static_cast if MyWizard doesn't have Q_OBJECT macro
wiz->something();

MyWizard *wiz = qobject_cast<MyWizard*>(wizard()); // or static_cast if MyWizard doesn't have Q_OBJECT macro
wiz->something();

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Can I reimplement ::next ? http://doc.trolltech.com/4.5/qwizard.html#next [slot] (doesnt say virtual, but I'm no c++ expert)

Reimplement nextId().

[BillGates]

Thanks so much for the code snippet, I didnt find this anywhere, in no example! Perhaps they considered normal people would know this..(qobject_cast). I had no clue that that must be done :< Thank you

About ::next(), I understand you are saying to Not reimplement ::next, but reimplement ::nextId() instead. I want to do some stuff when the user clicks "next" so ::next() seems more intuitive.. Basically, you are saying to "do some stuff" not in ::next but in ::nextId() ?

i was thinking
 
void myWizard::next()  {
 
  ..do some stuff...
 
  QWizard::next();
}
is this wrong in any way ?

i was thinking

void myWizard::next()  {

  ..do some stuff...

  QWizard::next();
}
is this wrong in any way ?

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PS: apparently if I do in myWizard constructor :
setButton(QWizard::NextButton, mybuton);
connect ( mybuton, SIGNAL(clicked()), this, SLOT(my_slot()));

my_slot() is executed AFTER the next Page's initializePage() ?!?! (is this logical?)

[wysota]

Thanks so much for the code snippet, I didnt find this anywhere, in no example! Perhaps they considered normal people would know this..(qobject_cast). I had no clue that that must be done :< Thank you

It's there in many places, I assure you.

About ::next(), I understand you are saying to Not reimplement ::next, but reimplement ::nextId() instead. I want to do some stuff when the user clicks "next" so ::next() seems more intuitive..

No, in that case you need to reimplement QWizardPage::initializePage() on the next page you want to show.

PS: apparently if I do in myWizard constructor :
setButton(QWizard::NextButton, mybuton);
connect ( mybuton, SIGNAL(clicked()), this, SLOT(my_slot()));

my_slot() is executed AFTER the next Page's initializePage() ?!?! (is this logical?)

Yes, it's logical.


Read this article, it might help you understand how wizards work:
http://doc.trolltech.com/qq/qq22-qwizard.html

[BillGates]

ok, i dont know if this is normal or not.... but apparently after casting i cannot access data members of wiz-> or even methods of wiz that themselves access members of the wizard object. I get a SIGSEGV upon running the program... (tried with static_cast too, although i have the q_object macro)

[wysota]

Check if wizard() doesn't return 0 or that qobject_cast doesn't return 0.

[BillGates]

in myPage1 constructor:
 
  qDebug()<< this->wizard()    ;  // outputs  QObject(0x0)
 
  myWizard *wiz = qobject_cast<myWizard*>(     wizard()  );  //also tried  myWizard *wiz = qobject_cast<myWizard*>((myWizard*)     wizard()  ); 
 
  if(wiz) {  wiz->my_slot("testing") ;  //does not get executed  }

in myPage1 constructor:

  qDebug()<< this->wizard()    ;  // outputs  QObject(0x0)

  myWizard *wiz = qobject_cast<myWizard*>(     wizard()  );  //also tried  myWizard *wiz = qobject_cast<myWizard*>((myWizard*)     wizard()  ); 

  if(wiz) {  wiz->my_slot("testing") ;  //does not get executed  }

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i set the Page in the myWizard constructor using : addPage( new myPage1( ) );

What am i screwing up?

[wysota]

Before you add the page to the wizard (which happens after the page constructor is executed) the page doesn't belong to the wizard so wizard() returns 0.

[BillGates]

I am so ashamed of myself. I am a complete idiot. I will give up programming and go be a janitor... Qt is great though....