Error: no matching member function for call to 'addTab' qtabwidget

Panoss

Hi.
I 'm trying to make this example of (creating and) using a help file in my Qt project.
But I get this error:

articleswindow.cpp:439:14: error: no matching member function for call to 'addTab'
qtabwidget.h:74:9: note: candidate function not viable: cannot convert argument of incomplete type 'QHelpContentWidget *' to 'QWidget *' for 1st argument
qtabwidget.h:75:9: note: candidate function not viable: requires 3 arguments, but 2 were provided

This is the code:

tWidget->addTab(helpEngine->contentWidget(), "Contents");

This is how helpEngine is created:

QHelpEngine* helpEngine = new QHelpEngine(
                QApplication::applicationDirPath() +
                "/documentation/qgraphicshelpexample.qhc")

And tWidget:

QTabWidget* tWidget = new QTabWidget;

Gow can I fix it?

Christian Ehrlicher

incomplete type 'QHelpContentWidget *'

If you want to use a class, you should include the header where it's defined in.

Panoss

I added the header.
The error dissappeared from the above mentiond row.

But remains for the next one:

tWidget->addTab(helpEngine->contentWidget(), "Contents");
    tWidget->addTab(helpEngine->indexWidget(), "Index");

Christian Ehrlicher

@Panoss said in Error: no matching member function for call to 'addTab' qtabwidget:

But remains for the next one:

You should tell us the error message...

Panoss

It's the same:

articleswindow.cpp:440:14: error: no matching member function for call to 'addTab'
qtabwidget.h:74:9: note: candidate function not viable: cannot convert argument of incomplete type 'QHelpIndexWidget *' to 'QWidget *' for 1st argument
qtabwidget.h:75:9: note: candidate function not viable: requires 3 arguments, but 2 were provided

SGaist

Where did you add:

#include <QHelpIndexWidget>

?

Panoss

@SGaist said in Error: no matching member function for call to 'addTab' qtabwidget:

Where did you add:
#include <QHelpIndexWidget>
?

You are so RIGHT!!!
I had not added this at all!
I had added only "qhelpcontentwidget.h".

Now it compiles and works ok!!...almost...
I get some irrelevant (??) message (in the application output in Qt Creator) when I open the help window:

QSqlDatabasePrivate::removeDatabase: connection 'QHelpCollectionHandler-281628994016-2' is still in use, all queries will cease to work.
QTextBrowser: No document for qthelp://walletfox.qt.helpexample/doc/index.html