The remove task is straightforward to implement, but we'll study some new concepts along the way. The Task has to notify its owner and parent (the MainWindow) that the removeTaskButton QPushButton has been clicked. We'll implement this by defining a custom removed signal in the Task.h files:
class Task : public QWidget
{
...
public slots:
void rename();
signals:
void removed(Task* task);
...
};
Like we did for the slots, we have to add the Qt keyword signals in our header. Since signal is used only to notify another class, the public keyword is not needed (it even raises a compilation error). signal is simply a notification sent to the receiver (the connected slot); it implies that there is no function ...
