[Qt-interest] customised signals and slots in qt

[Sahana Bhaskar]

Sorry but I get a linker error not syntax error saying:
error LNK2001: unresolved external symbol "public: virtual int __thiscall FileData::qt_metacall(enum QMetaObject::Call,int,void * *)" (?qt_metacall at FileData@@UAEHW4Call at QMetaObject@@HPAPAX at Z)
FileData.obj : error LNK2001: unresolved external symbol "public: virtual void * __thiscall FileData::qt_metacast(char const *)" (?qt_metacast at FileData@@UAEPAXPBD at Z)
FileData.obj : error LNK2001: unresolved external symbol "public: virtual struct QMetaObject const * __thiscall FileData::metaObject(void)const " (?metaObject at FileData@@UBEPBUQMetaObject@@XZ)

Note:object_b(in the code snippet below) is an instance of FileData;



Thanks,
Sahana

-----Original Message-----
From: qt-interest-bounces+sahana_bhaskar=infosys.com at qt.nokia.com [mailto:qt-interest-bounces+sahana_bhaskar=infosys.com at qt.nokia.com] On Behalf Of Bill Crocker
Sent: Friday, July 08, 2011 7:41 AM
To: qt-interest at qt.nokia.com
Subject: Re: [Qt-interest] customised signals and slots in qt


>>
>> Connect(object_a, SIGNAL( signal1()),object_b, SLOT(slot1()));
>
> That should be:
>
>    connect(object_a, SIGNAL(signal1()), object_b, SLOT(slot1()));
>

No, that should be:

     if( !connect(object_a, SIGNAL(signal1()), object_b, SLOT(slot1())) )
         Q_ASSERT(false);


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