Signals and Events in Qt4.8

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Hi..

Myself being a newbie in Qt.I tried to write an application in Qt with some other code included.But that code already contain functions like emit(),event used.So how can i use these in this Qt application without a clash with the Qt keywords.

Posted 22-May-13 23:43pm

sarah john

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markkuk · Answer 1 · 2013-05-23T00:23:00

Solution 1

Qt class member functions like QObject::event()[^] don't conflict with global functions or member functions of other classes with similar names. This is basic C++ functionality. Use the scope resolution operator[^] when necessary.

Posted 23-May-13 0:23am

markkuk

jsolutions_uk · Answer 2 · 2013-05-23T22:17:00

It sounds on the face of it you will need to do some refactoring of your calls to emit() in the other code.

If emit is a method on another base class, then it should just be a case of ensuring it is this scope that is resolved (ie Base::emit()) If the emit() function is a global function in an external library, you may be able to just use ::emit(), or create a namespace wrapped version of emit() by creating a new header and source file with a Namespace::emit() defined to call the emit() function outside of Qt.

Of course, this is a bit of a guess as I don't know the structure of your existing code and how it is being used. Hope it's of help though.

sarah john · Answer 3 · 2013-05-23T00:52:00

Solution 2

But with the emit function in the other code which i included , i am receving errors in my qt application.

Posted 23-May-13 0:52am

sarah john