[SOLVED] Call virtual methods from QThread::run()
-
This may be a C++ question so apologies in advance - I just couldn't google an answer (or even a variation on the question).
I have a class subclassing QThread, and it has a pure virtual method.
@
class Thread : public QThread
{
public:
Thread(QObject *parent);
virtual void run()
{
while (true) {
doSomething();
}
}
virtual void doSomething() = 0;
};
@I have a class subclassing the above, with an implementation of that virtual method
@
class ThreadSub : public Thread
{
ThreadSub(QObject *parent)
: Thread(parent)
{
}virtual void doSomething() { qDebug() << "something"; }};
@I created an instance of ThreadSub and called start(). I got an error saying "Pure virtual method called".
This is a simplified version of the code I had but, based on what is visible here, should there be any issue?
-
And a clarification - in my full code, the constructor or destructor of the base class do not the virtual method.
-
I think it is the same problem as with the constructor. If you overwrite the run method again, it should work (but I did not try!).
-
Thanks for your comment butterface,
But I do want my run() code to run in the base class - that's the whole point of my class-subclass separation.
-
The code you posted works fine, so there must be something wrong in the real code.
It's usually a better idea to separate the thread management (QThread object) from the work itself (a QObject derived worker object). Deriving from QThread has all sorts of potential problems. -
I ended up changing the code a lot - but if I remember correctly, this WAS eventually an issue with the destructor/constructor. Wish I had more to add but anyway it's solved.
