LNK2019 on constructor with QGraphicsView subclass

Question

I may be missing something obvious, but I can't get rid of a linking error in my Qt user interface.

I've isolated the part that's causing trouble. Basically, I'm implementing a subclass of QGraphicsView to display an interactive overhead map. For some reason, I can't get the constructor to be resolved.

OverheadMap.h :

#ifndef OVERHEADMAP_H
#define OVERHEADMAP_H

#include <QGraphicsView>

class OverheadMap : public QGraphicsView {
    Q_OBJECT

public:
    OverheadMap();
};

#endif // OVERHEADMAP_H

OverheadMap.cpp :

#include "OverheadMap.h"

OverheadMap::OverheadMap() {
    // Body
}

main.cpp :

#include "OverheadMap.h"

int main(int argc, char *argv[])
{
    OverheadMap *map = new OverheadMap();
}

LNK2019 :

main.obj:-1: error: LNK2019: unresolved external symbol "public: __thiscall OverheadMap::OverheadMap(void)" (??0OverheadMap@@QAE@XZ) referenced in function _main

I can without any trouble use QtCreator's auto-completion with OverheadMap, and I have done a similar subclass implementation of a QFrame that's working, so I doubt there's a syntax error here.

What am I missing?

Thanks.

Answer 1

This code works just fine for me.

So, the solution is that you have to re-run qmake because based on your comments, you modified the project structure without telling that to qmake.