fast_delegate

Use libCppEvent

There's no doubt how important an event/delegate ("signal/slot" in Qt/libsigc++) mechanism implementation is in a GUI toolkit and there're already some successful C++ implementations, for example:

• Qt
• ligsigc++
• boost(signal2)

And also many excellent articles about fast delegate in C++ on the web. For example:

• Member Function Pointers and the Fastest Possible C++ Delegates by Don Clugston
• The Impossibly Fast C++ Delegates by by Sergey Ryazanov
• Fast C++ Delegate: Boost.Function 'drop-in' replacement and multicast by JaeWook Choi
• CppEvents by Nickolas V. Pohilets

BlendInt use libCppEvent to provide an object-oriented event/delegate framework. An event, for example, a button click event, can be connected to an view object:

  button.clicked().connect(obj, &ViewObject::DoSth);

When you click a button in the window, the method ViewObject::DoSth() of obj will be called.

The event can be disconnected:

  button.clicked().disconnect(obj, &ViewObject::DoSth);

Here is a quick guide of how to use libCppEvent.

The source code of libCppEvent in BlendInt:

Folder	Remark
/include/blendint/cppevent	Header
/lib/cppevent	Source

Tiny introduction of events

Declaring Events

Connecting Events

Arguments

Event Chaining

Virtual Events