Re: [Boost-users] boost::bind and Motif

3 May 2012

...
No, you don't have to make a signleton. The function XtAppAddTimeOut
accepts "XtPointer client_data" argument, where you can pass "this".
Then you get it back in the callback function, and type-cast it to its
original type.
Ok this is another solution. But I don't like such pointer casts.
I have done it  the following way:

class AnimationController {
private:
     static boost::optional cInstance;
public:
     static AnimationController& instance() {
         return cInstance.get();
     }
     AnimationController() {
         cInstance = *this;
     }
     static void timerCB() {
         instance().animate();
     }
private:
     void animate();
};

Just as praise for boost::optional :-)
Sven

Re: [Boost-users] boost::bind and Motif

Sven Bauhan