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POUndefined reference to vtable... Q_OBJECT macro
 

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    <p>When I uncomment the Q_OBJECT macro that I need for signal-slot I get a undefined reference to vtable for MyApp error, but without the macro it compiles perfectly but I can't use signals and slots without it. I think I may be doing something stupid wrong, but please try helping because I realy can't find the problem. O and I know my code is untidy and am working on it.</p> <p>myapp.h:</p> <pre><code>#ifndef MYAPP_H #define MYAPP_H #include &lt;QApplication&gt; #include &lt;QEvent&gt; #include &lt;QObject&gt; #include &lt;QDebug&gt; class MyApp : public QApplication { public: MyApp( int argc, char** argv ); protected: bool eventFilter(QObject *object, QEvent *event); signals: void focusG(); void focusL(); }; #endif // MYAPP_H </code></pre> <p>myapp.cpp:</p> <pre><code>#include "myapp.h" MyApp::MyApp(int argc, char **argv): QApplication(argc, argv) { installEventFilter(this); } bool MyApp::eventFilter(QObject *object, QEvent *event) { if (event-&gt;type() == QEvent::ApplicationDeactivate) { qDebug() &lt;&lt; "Focus lost"; //focusL(); } if (event-&gt;type() == QEvent::ApplicationActivate) { qDebug() &lt;&lt; "Focus gained"; //focusG(); } return false; } </code></pre> <p>main.cpp:</p> <pre><code>#include &lt;QtGui/QApplication&gt; #include "qmlapplicationviewer.h" #include &lt;QObject&gt; #include &lt;QGraphicsObject&gt; #include &lt;QTimer&gt; #include &lt;QVariant&gt; #include "timecontrol.h" #include "scorecontrol.h" #include "Retry.h" #include &lt;QEvent&gt; #include "myapp.h" int main(int argc, char *argv[]) { //QApplication app(argc, argv); MyApp app(argc, argv); QmlApplicationViewer viewer; viewer.setOrientation(QmlApplicationViewer::ScreenOrientationLockLandscape); viewer.setMainQmlFile(QLatin1String("qml/Raker/main.qml")); viewer.showExpanded(); QObject *rootObject = viewer.rootObject(); QTimer *timmer = new QTimer; timmer-&gt;setInterval(1000); TimeControl *timcon = new TimeControl; scorecontrol *scorer = new scorecontrol; Retry *probeer = new Retry; QObject::connect(timmer, SIGNAL(timeout()), timcon, SLOT(updateTime())); QObject::connect(timcon, SIGNAL(setTime(QVariant)), rootObject, SLOT(setTime(QVariant))); QObject::connect(rootObject, SIGNAL(blockClicked(int, int)), scorer, SLOT(checkRight(int, int))); QObject::connect(scorer, SIGNAL(setScore(QVariant)), rootObject, SLOT(setScore(QVariant))); QObject::connect(scorer, SIGNAL(setState(QVariant)), rootObject, SLOT(setState(QVariant))); QObject::connect(rootObject, SIGNAL(start()), probeer, SLOT(Reetry())); QObject::connect(probeer, SIGNAL(start()), timmer, SLOT(start())); QObject::connect(probeer, SIGNAL(stop()), timmer, SLOT(stop())); QObject::connect(probeer, SIGNAL(start(int)), scorer, SLOT(randomNum(int))); QObject::connect(probeer, SIGNAL(sReset()), timcon, SLOT(reset())); QObject::connect(probeer, SIGNAL(tReset()), scorer, SLOT(reset())); QObject::connect(timcon, SIGNAL(timeOut()), scorer, SLOT(reset())); QObject::connect(timcon, SIGNAL(setState(QVariant)), rootObject, SLOT(setState(QVariant))); QObject::connect(timcon, SIGNAL(changeFinal()), scorer, SLOT(changeFinal())); QObject::connect(scorer, SIGNAL(setFinal(QVariant)), rootObject, SLOT(setFinal(QVariant))); QObject::connect(&amp;app, SIGNAL(focusL()), probeer, SLOT(focusL())); QObject::connect(&amp;app, SIGNAL(focusG()), probeer, SLOT(focusG())); return app.exec(); } </code></pre> <p>BlockToucher.pro:</p> <pre><code># Add more folders to ship with the application, here folder_01.source = qml/Raker folder_01.target = qml DEPLOYMENTFOLDERS = folder_01 # Additional import path used to resolve QML modules in Creator's code model QML_IMPORT_PATH = symbian:TARGET.UID3 = 0x2004b49f # Smart Installer package's UID # This UID is from the protected range and therefore the package will # fail to install if self-signed. By default qmake uses the unprotected # range value if unprotected UID is defined for the application and # 0x2002CCCF value if protected UID is given to the application symbian:DEPLOYMENT.installer_header = 0x2002CCCF # Allow network access on Symbian symbian { #TARGET.CAPABILITY += NetworkServices vendorinfo = "%{\"Gerhard de Clercq\"}" ":\"Gerhard de Clercq\"" ICON = BlockToucher.svg } # If your application uses the Qt Mobility libraries, uncomment the following # lines and add the respective components to the MOBILITY variable. # CONFIG += mobility # MOBILITY += # The .cpp file which was generated for your project. Feel free to hack it. SOURCES += main.cpp \ timecontrol.cpp \ scorecontrol.cpp \ Retry.cpp \ myapp.cpp \ myapplication.cpp # Please do not modify the following two lines. Required for deployment. include(qmlapplicationviewer/qmlapplicationviewer.pri) qtcAddDeployment() HEADERS += \ timecontrol.h \ scorecontrol.h \ Retry.h \ myapp.h \ myapplication.h OTHER_FILES += \ qtc_packaging/debian_fremantle/rules \ qtc_packaging/debian_fremantle/README \ qtc_packaging/debian_fremantle/copyright \ qtc_packaging/debian_fremantle/control \ qtc_packaging/debian_fremantle/compat \ qtc_packaging/debian_fremantle/changelog compat \ qtc_packaging/debian_fremantle/changelog </code></pre>
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