QTableWidgetItem text() function not linking ?

[marcvanriet]

Hello,

I want to get the text of a cell of a tablewidget on my form.

I have already filled the tablewidget with new tablewidgetitems using setItem(), and all text is showing fine in my first test program.

Now i try to write a 'getter' function using the QTablewidget text() function like this :

QString CMainDialog::getTableText( int nRow, int nCol )
{
    QString sResult="-";
    QTableWidgetItem *pCell = ui->tblPorts->item( nRow, nCol );
 
    if( pCell!=NULL )
        sResult = pCell->text();
 
    return sResult;
}

QString CMainDialog::getTableText( int nRow, int nCol )
{
    QString sResult="-";
    QTableWidgetItem *pCell = ui->tblPorts->item( nRow, nCol );

    if( pCell!=NULL )
        sResult = pCell->text();

    return sResult;
}

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Compiling goes fine, but then I get a linker error saying

mainDialog.obj:: error: unresolved external symbol "__declspec(dllimport) public: class QString __thiscall QTableWidgetItem::text(void)const " (__imp_?text@QTableWidgetItem@@QBE?AVQString@@XZ)

I am working with QtCreator and have Qt 4.6.3 statically linked with the MS VC compiler.

Has anyone already encountered this ? Or better yet, has a solution for this ?

Best regards,
Marc

[Lykurg]

Do you link the right lib files to your code? Do you have build Qt static for release and debug mode?

[marcvanriet]

Hi Lykurg,

Linking fails both in debug and release mode. I have built Qt statically both for release and debug mode.

QtCreator makes my .pro file, and Qt core and gui are included. I just added stuff to use QextSerialPort (which is working by the way, so that's not the issue). I would be surprised if I had to manually add an extra LIB just to use a QTableWidget.

QT       += core gui
TARGET = DibScan
TEMPLATE = app
SOURCES += main.cpp\
        mainDialog.cpp
HEADERS  += mainDialog.h
FORMS    += mainDialog.ui
INCLUDEPATH += ".\include"
LIBS          += -lqextserialport
win32:DEFINES  = _TTY_WIN_ QWT_DLL QT_DLL

QT       += core gui
TARGET = DibScan
TEMPLATE = app
SOURCES += main.cpp\
        mainDialog.cpp
HEADERS  += mainDialog.h
FORMS    += mainDialog.ui
INCLUDEPATH += ".\include"
LIBS          += -lqextserialport
win32:DEFINES  = _TTY_WIN_ QWT_DLL QT_DLL

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I don't see why the QTableWidgetItem::setText() function is no problem, but the text() function is. It should be in the same source file in Qt I would think.

Best regards,
Marc

[Lykurg]

Can't see "CONFIG += static" and I don't know QT_DLL exactly, but dll is not what you want when you link static. I am a little confused. ([WIKI]Building static Qt on Windows[/WIKI])

[marcvanriet]

Hi Lykurg,

Thanks, you pointed me in the right direction.

I just blindly copied the #win32EFINES = _TTY_WIN_ QWT_DLL QT_DLL from the example with QextSerialport to my .pro file. I tought it just had to do something with Qextserialport.

But the QT_DLL and QWT_DLL defines are of course not allowed for a static application. Everything works if I leave it out.

I'm not sure why I don't need the CONFIG += static line. I think it is because I modified the QMAKE_CFLAGS / CXXFLAGS / LFLAGS directly in the qmake.conf file in the mkspecs directory.

Best regards,
Marc