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

[dcopeto]

Hi!

I'm using a QWizard to get some user configurations at the beggining of my program but i can't seem to find a way to fill in my database class with the data the user enters in the wizard pages! How can this be done?


thanks a lot for the help,
david

[Lykurg]

Hi,

have a look at the docs, there you can find your questions answered: Class Wizard Example. Especially "void ClassWizard::accept()".

Or in your code is somewhere

MyWizard wiz;
wiz.exec()
wiz.getMyFancyData(); // where you have to implement these function in your wizard class...

MyWizard wiz;
wiz.exec()
wiz.getMyFancyData(); // where you have to implement these function in your wizard class...

To copy to clipboard, switch view to plain text mode 

Lykurg

[dcopeto]

Thanks for the reply


Yeah in the meantime i found that too and my problem changed:
From what i understood, one recovers the data using something like

QString sessionName = field("session.name").toString();

QString sessionName = field("session.name").toString();

To copy to clipboard, switch view to plain text mode 

which is ok. My problem is that i want to recover data from a QTableWidget! Any ideas on how to do this?


thanks for your help,
david

[Lykurg]

The "field" way is only one possibility. Since the QWizard is a normal class you can simply add a private member which points to the table. Use this pointer in the "save" function to get the data.

[dcopeto]

Maybe i didn't give you enough details because i'm having trouble finding out to do that...


This is what i have in my startwizard.h

class startWizard : public QWizard
{
	Q_OBJECT
 
	public:
		enum{Page_Intro, Page_New, Page_Load, Page_Configs, Page_LoadDetails, Page_NewDetails};
		startWizard(QWidget *parent = 0);
 
		void accept();
 
};
 
(...)
 
class configsPage : public QWizardPage
{
	Q_OBJECT
 
	public:
		configsPage(QWidget *parent = 0);
		int nextId();
 
	private:
		(...)
		QTableWidget *tableDisplay;
 
(...)
};

class startWizard : public QWizard
{
	Q_OBJECT

	public:
		enum{Page_Intro, Page_New, Page_Load, Page_Configs, Page_LoadDetails, Page_NewDetails};
		startWizard(QWidget *parent = 0);

		void accept();

};

(...)

class configsPage : public QWizardPage
{
	Q_OBJECT

	public:
		configsPage(QWidget *parent = 0);
		int nextId();

	private:
		(...)
		QTableWidget *tableDisplay;
		
(...)
};

To copy to clipboard, switch view to plain text mode 

In the ConfigsPage of the wizard i create the table for the user to see what he's adding/configuring and then i want to be able to recover the data he just entered to my database object in the main application.

In your previous reply you meant placing a QTableWidget pointer in the startWizard class, pointing to the table that gets the stuff in ConfigsPage class? even that i'm having trouble with...

I still don't see how can i go on from there? I mean to have access to the database I must make the wizard have access to the database somehow...


thanks a lot for the help,
david

[wysota]

Move the table widget pointer to your QWizard subclass and then access the pointer when you want to retrieve the data.

[Lykurg]

class startWizard : public QWizard
{
	Q_OBJECT
	public:
		enum{Page_Intro, Page_New, Page_Load, Page_Configs, Page_LoadDetails, Page_NewDetails};
		startWizard(QWidget *parent = 0);
		void accept();
  private:
    configsPage *m_configsPage;
};
 
startWizard::startWizard(QWidget *parent) : QWizard(parent) {
  //...
  m_configsPage = new configsPage(this);
  addPage(m_configsPage);
  //...
}
 
void startWizard::accept() {
  //...
  m_configsPage->table() //<- here's your pointer...
  //...
}
(...)
 
class configsPage : public QWizardPage
{
	Q_OBJECT
 
	public:
		configsPage(QWidget *parent = 0);
		int nextId();
  const QTableWidget* table() const {return tableDisplay;}
 
	private:
		(...)
		QTableWidget *tableDisplay;
 
(...)
};

class startWizard : public QWizard
{
	Q_OBJECT
	public:
		enum{Page_Intro, Page_New, Page_Load, Page_Configs, Page_LoadDetails, Page_NewDetails};
		startWizard(QWidget *parent = 0);
		void accept();
  private:
    configsPage *m_configsPage;
};

startWizard::startWizard(QWidget *parent) : QWizard(parent) {
  //...
  m_configsPage = new configsPage(this);
  addPage(m_configsPage);
  //...
}

void startWizard::accept() {
  //...
  m_configsPage->table() //<- here's your pointer...
  //...
}
(...)

class configsPage : public QWizardPage
{
	Q_OBJECT

	public:
		configsPage(QWidget *parent = 0);
		int nextId();
  const QTableWidget* table() const {return tableDisplay;}

	private:
		(...)
		QTableWidget *tableDisplay;
		
(...)
};

To copy to clipboard, switch view to plain text mode 

[dcopeto]

THANK YOU!

That took care of my table access and now I have also managed to 'reach' the dataBase from the wizard by passing a pointer to the database to it!

thanks again,
david

[wysota]

You don't have to transfer pointers to the database (assuming you are using QSqlDatabase). You can always retrieve the connection by calling it by name. See docs of QSqlDatabase.

[dcopeto]

Hey! thanks for the suggestion! I'm not using sqlDatabase, I'm using my own storing class, because it's not a lot of stuff, anyway can you tell me when does it 'payoff' to use a sql database instead of a custom class? I'm not really into it so it's probable that I'm writing garbage right this moment...


thanks,
david

[BillGates]

hi

maybe i didnt understand very well the method that Lykurg wrote in code, but, will other Pages of the wizard be able to access m_configsPage->table() ?

Is it possible to pass objects instead of int/Qstrings using ::field() and registerField(..) ?

[wysota]

You can pass anything that will fit into QVariant.

[BillGates]

Thanks for reply wysota !

Im sorry to ask, but is there any example somewhere ? I am a noob.
I searched on the net and even here but all I could find were widgets with properties that were int or string.

As I understand it it must be something like :

registerField("name", myWidget, "myProperty", SIGNAL(selectionChanged()));

so i conclude that i must declare my own widget and my own propery. Is this correct ?
My purpose is to make variables like a QList accessible to any/all wizardPage subclass.

[wysota]

A QList of what? That's a template class, you know... And while you are at it, what is the reason for doing that? You can always expose the list using your wizard class's public interface.

[BillGates]

yes, i know its a template, pardon me, a QList<QString> . I didnt think it mattered much.
I dont understand what you mean by "your wizard class public interface" ? Maybe I am missing something?

[wysota]

yes, i know its a template, pardon me, a QList<QString> . I didnt think it mattered much.

Well, it does, because QStringList is already registered to be used with QVariant.

I dont understand what you mean by "your wizard class public interface" ? Maybe I am missing something?

I mean two methods in your wizard class's "public" section - one for setting the value and the other for getting it. Look at the code Lykurg has written, "table()" is the getter method and "setTable(QTableWidget*)" would be a setter method.

Still you didn't answer what you want to do with this all so maybe there are tons of better way to do what you want.

[BillGates]

I want for the QTableWidget *tableDisplay from the first QWizardPAGE to be accesible to the second, the third and so on Pages. So that i can use them for default values, exacty what the field() does.
The only problem is that I am not competent enough; I dont know how to pass my own variables through registerField().
If I have a QStringList created in Page1, i would like to access it in Page2 and Page3..


in void myPage2::initializePage() {

myObject list = field("some_field_registered_from_page1") <-- something like this...

}

[wysota]

I want for the QTableWidget *tableDisplay from the first QWizardPAGE to be accesible to the second, the third and so on Pages. So that i can use them for default values, exacty what the field() does.

It's not what the field() does. To me it seams you need a model in your wizard. Then you can set this model to a QTableView (or QListView) in the first wizard page and also access the model from other pages. field() should represent a single value, not all possible values.

[BillGates]

Umh... so how would i access the model from the QWizard class from inside the Pages ? Pass it to their constructor ?

[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.