delegate.h

Public Typedefs

typedef fastdelegate::DelegateMemento DelegateMemento 

An opaque structure which can hold an arbitary delegate.

 1
 2//-----------------------------------------------------------------------------
 3// Copyright (c) 2012 GarageGames, LLC
 4//
 5// Permission is hereby granted, free of charge, to any person obtaining a copy
 6// of this software and associated documentation files (the "Software"), to
 7// deal in the Software without restriction, including without limitation the
 8// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 9// sell copies of the Software, and to permit persons to whom the Software is
10// furnished to do so, subject to the following conditions:
11//
12// The above copyright notice and this permission notice shall be included in
13// all copies or substantial portions of the Software.
14//
15// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21// IN THE SOFTWARE.
22//-----------------------------------------------------------------------------
23
24#ifndef _UTIL_DELEGATE_H_
25#define _UTIL_DELEGATE_H_
26
27#include "core/util/FastDelegate.h"
28
29/// @def Delegate
30/// The macro which abstracts the details of the delegate implementation.
31#define Delegate fastdelegate::FastDelegate
32
33/// @typedef DelegateMemento
34/// An opaque structure which can hold an arbitary delegate.
35/// @see Delegate
36typedef fastdelegate::DelegateMemento DelegateMemento;
37
38
39template<class T>
40class DelegateRemapper : public DelegateMemento
41{
42public:
43   DelegateRemapper() : mOffset(0) {}
44
45   void set(T * t, const DelegateMemento & memento)
46   {
47      SetMementoFrom(memento);
48      if (m_pthis)
49         mOffset = ((int)m_pthis) - ((int)t);
50   }
51
52   void rethis(T * t)
53   {
54      if (m_pthis)
55         m_pthis = (fastdelegate::detail::GenericClass *)(mOffset + (int)t);
56   }
57
58protected:
59   S32 mOffset;
60};
61
62#endif // _UTIL_DELEGATE_H_
63