claw  1.9.0
tweener.cpp
1 /*
2  CLAW - a C++ Library Absolutely Wonderful
3 
4  CLAW is a free library without any particular aim but being useful to
5  anyone.
6 
7  Copyright (C) 2005-2011 Julien Jorge
8 
9  This library is free software; you can redistribute it and/or
10  modify it under the terms of the GNU Lesser General Public
11  License as published by the Free Software Foundation; either
12  version 2.1 of the License, or (at your option) any later version.
13 
14  This library is distributed in the hope that it will be useful,
15  but WITHOUT ANY WARRANTY; without even the implied warranty of
16  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  Lesser General Public License for more details.
18 
19  You should have received a copy of the GNU Lesser General Public
20  License along with this library; if not, write to the Free Software
21  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22  contact: julien.jorge@stuff-o-matic.com
23 */
29 #include <claw/tween/tweener.hpp>
30 
32 
37  : m_impl(NULL)
38 {}
39 
45  : m_impl(that.m_impl == NULL ? NULL : that.m_impl->clone())
46 {}
47 
53  : m_impl(that.clone())
54 {}
55 
60 {
61  delete m_impl;
62 }
63 
69 {
70  tweener tmp(that);
71  swap(tmp);
72  return *this;
73 }
74 
80 {
81  std::swap(m_impl, that.m_impl);
82 }
83 
88 {
89  if(m_impl == NULL)
90  return true;
91  else
92  return m_impl->is_finished();
93 }
94 
100 {
101  if(m_impl == NULL)
102  return dt;
103  else
104  return m_impl->update(dt);
105 }
106 
111 {
112  if(m_impl != NULL)
113  m_impl->on_finished(f);
114 }
115 
121 template <>
123 {
124  a.swap(b);
125 }
double update(double dt)
Update the tweener of a given amount of time.
Definition: tweener.cpp:99
std::function< void()> finish_callback
The type of the function called to notify the end of the tweener.
Definition: tweener.hpp:54
Function object that clones a pointer.
Definition: functional.hpp:296
void swap(tweener &that)
Swap this instance with a given instance.
Definition: tweener.cpp:79
Common interface for all tweeners.
A tweener makes a value to evolve through time from a initial value to an end value according to a gi...
~tweener()
Destructor.
Definition: tweener.cpp:59
void swap(claw::tween::tweener &a, claw::tween::tweener &b)
Swap two tweeners.
Definition: tweener.cpp:122
A tweener makes a value to evolve through time from a initial value to an end value according to a gi...
Definition: tweener.hpp:47
Common interface for all tweeners.
tweener & operator=(const tweener &that)
Assignment operator.
Definition: tweener.cpp:68
tweener()
Default constructor.
Definition: tweener.cpp:36
bool is_finished() const
Tell if the tweener has reached his total duration.
Definition: tweener.cpp:87
void on_finished(finish_callback f)
Execute the callbacks notifying about the finish of the tweener.
Definition: tweener.cpp:110