Notifier< T > Class Template Reference

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Detailed Description

template<class T>
class Notifier< T >

class to help setup a callback handling.

What we have discovered is that the two things:

• providing a notification of an event to the outside world
• asking a notification of a certain object are strongly coupled. Qt has its Signal/Slot pair, but we found that too inflexible. Enter Notifier. You declare a Notifier to announce to the world that they can be notified of something. The 'receiving' object can then call the notify() method to 'register' the event notification. The sending object just calls trigger(). Note that it is most used in the UI, but it is equally usable in batch stuff. In general, it provides a rigorous uncoupling.

Simply declare a Notifier<T> in the interface, like:

Notifier<MyClass>       buttonclicked;

Then users of the class can issue:

amyclass.buttonclicked.notify( mCB(this,TheClassOfThis,theMethodToBeCalled) );

The callback is issued when you call the trigger() method, like:

buttonclicked.trigger();

The notification can be temporary stopped using disable()/enable() pair, or by use of a NotifyStopper, which automatically restores the callback when going out of scope.

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