Claw  1.7.3
tweener.cpp
Go to the documentation of this file.
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@gamned.org
23 */
29 #include <claw/tween/tweener.hpp>
30 
32 
33 /*----------------------------------------------------------------------------*/
38  : m_impl(NULL)
39 {
40 
41 } // tweener::tweener()
42 
43 /*----------------------------------------------------------------------------*/
49  : m_impl( that.m_impl == NULL ? NULL : that.m_impl->clone() )
50 {
51 
52 } // tweener::tweener()
53 
54 /*----------------------------------------------------------------------------*/
60  : m_impl( that.clone() )
61 {
62 
63 } // tweener::tweener()
64 
65 /*----------------------------------------------------------------------------*/
70 {
71  delete m_impl;
72 } // tweener::~tweener()
73 
74 /*----------------------------------------------------------------------------*/
80 {
81  tweener tmp(that);
82  swap(tmp);
83  return *this;
84 } // tweener::operator=()
85 
86 /*----------------------------------------------------------------------------*/
91 void claw::tween::tweener::swap( tweener& that ) throw()
92 {
93  std::swap(m_impl, that.m_impl);
94 } // tweener::swap()
95 
96 /*----------------------------------------------------------------------------*/
101 {
102  if ( m_impl == NULL )
103  return true;
104  else
105  return m_impl->is_finished();
106 } // tweener::is_finished()
107 
108 /*----------------------------------------------------------------------------*/
113 double claw::tween::tweener::update( double dt )
114 {
115  if ( m_impl == NULL )
116  return dt;
117  else
118  return m_impl->update(dt);
119 } // tweener::update()
120 
121 /*----------------------------------------------------------------------------*/
126 {
127  if ( m_impl != NULL )
128  m_impl->on_finished(f);
129 } // tweener::on_finished()
130 
131 /*----------------------------------------------------------------------------*/
137 template<>
139 {
140  a.swap(b);
141 } // std::swap()
double update(double dt)
Update the tweener of a given amount of time.
Definition: tweener.cpp:113
Function object that clones a pointer.
Definition: functional.hpp:275
void swap(tweener &that)
Swap this instance with a given instance.
Definition: tweener.cpp:91
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...
void on_finished(finish_callback f)
Execute the callbacks notifying about the finish of the tweener.
~tweener()
Destructor.
Definition: tweener.cpp:69
void swap(claw::tween::tweener &a, claw::tween::tweener &b)
Swap two tweeners.
Definition: tweener.cpp:138
A tweener makes a value to evolve through time from a initial value to an end value according to a gi...
Definition: tweener.hpp:48
boost::function< void()> finish_callback
The type of the function called to notify the end of the tweener.
Definition: tweener.hpp:55
Common interface for all tweeners.
bool is_finished() const
Tell if the tweener has reached his total duration.
tweener & operator=(const tweener &that)
Assignment operator.
Definition: tweener.cpp:79
tweener()
Default constructor.
Definition: tweener.cpp:37
bool is_finished() const
Tell if the tweener has reached his total duration.
Definition: tweener.cpp:100
void on_finished(finish_callback f)
Execute the callbacks notifying about the finish of the tweener.
Definition: tweener.cpp:125
double update(double dt)
Update the base_tweener of a given amount of time.