I am having trouble calling a slot directly from subclass of QListWidget. It fails to link claiming an undefined reference to MyClass::MySlot. If instead of calling it, I just connect to slot and emit the appropriate signal everything works fine. It seems to me that it's probably a compiler/qmake/makefile issue but I'm not sure. Below is a rough approximation of the issue I'm having. I have omitted all the #include for the sake of brevity.

I have a subclass of QObject that looks roughly like

Qt Code: 
  1. class MyClass : public QObject {
  2.  
  3. Q_OBJECT
  4.  
  5. public:
  6.     MyClass(QObject* parent = NULL) : QObject(parent) { }
  7.     void MyFunc() { 
  8.         // do some work
  9.     }
  10.  
  11. public slots:
  12.    void MySlot() {
  13.        // do some work
  14.    }
  15. }
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And...

Qt Code: 
  1. class MyListWidget : public QListWidget {
  2.  
  3. Q_OBJECT
  4.  
  5. private:
  6.     MyClass* foo;
  7.  
  8. public:
  9.     MyListWidget(QWidget* parent = NULL) : QListWidget(parent) { }
  10.  
  11. public slots:
  12.     void bar() {
  13.        // won't compile, linker fails - undefined reference to 'MyClass::MySlot'
  14.        foo->MySlot();
  15.     }
  16.  
  17.     void baz() {
  18.         // this compiles and works fine
  19.         QObject::connect(this, SIGNAL(callSlot), foo, SLOT(MySlot()));
  20.         emit callSlot();
  21.         QObject::disconnect(this, SIGNAL(callSlot), foo, SLOT(MySlot()));
  22.  
  23.        // also works
  24.        foo->MyFunc();
  25.     }
  26.  
  27. signals:
  28.     void callSlot();
  29. }
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