1 /* === S Y N F I G ========================================================= */
3 ** \brief Template Header
8 ** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
9 ** Copyright (c) 2007 Chris Moore
11 ** This package is free software; you can redistribute it and/or
12 ** modify it under the terms of the GNU General Public License as
13 ** published by the Free Software Foundation; either version 2 of
14 ** the License, or (at your option) any later version.
16 ** This package is distributed in the hope that it will be useful,
17 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 ** General Public License for more details.
22 /* ========================================================================= */
24 /* === S T A R T =========================================================== */
26 #ifndef __SYNFIG_TIME_H
27 #define __SYNFIG_TIME_H
29 /* === H E A D E R S ======================================================= */
31 #include "string_decl.h"
33 /* === M A C R O S ========================================================= */
35 /* === T Y P E D E F S ===================================================== */
37 /* === C L A S S E S & S T R U C T S ======================================= */
43 ** \see TimeFormat, time_to_string(), string_to_time()
48 typedef double value_type;
52 ** \see Time, get_string() */
55 FORMAT_NORMAL=0, //!< Represents the default method of printing the time
56 FORMAT_NOSPACES=(1<<0), //!< Remove any whitespace
57 FORMAT_FULL=(1<<1), //!< Do not remove units that have "zero" value
58 FORMAT_VIDEO=(1<<2), //!< Use the HH:MM:SS.FF format
59 FORMAT_FRAMES=(1<<3), //!< Use the FF format (frames only)
61 FORMAT_END=(1<<4) //!< \internal Not used
62 }; // END of enum Format
67 static value_type epsilon_() { return static_cast<value_type>(0.0005); }
72 Time(const value_type &x):value_(x) { }
74 Time(int x):value_(x) { }
76 Time(int hour, int minute, float second):value_(static_cast<value_type>(second+hour*3600+minute*60)) { }
78 //! Constructs Time from the given string.
79 /*! \note If the string references frames, then the
80 ** frame rate (\a fps) should be provided from the
81 ** correct source. (Which is most likely the RendDesc
82 ** of the current Canvas)
83 ** The frame count will be ignored if the
84 ** FPS is not given. */
85 Time(const String &string, float fps=0);
87 //! Marks the exclusive negative boundary of time
88 static const Time begin() { return static_cast<synfig::Time>(-32767.0f*512.0f); }
90 //! Marks the exclusive positive boundary of time
91 static const Time end() { return static_cast<synfig::Time>(32767.0f*512.0f); }
94 static const Time zero() { return static_cast<synfig::Time>(0); }
96 //! The amount of allowable error in calculations
97 static const Time epsilon() { return static_cast<synfig::Time>(epsilon_()); }
99 //! Returns a string describing the current time value
101 String get_string(float fps=0, Time::Format format=FORMAT_NORMAL)const;
104 const char *c_str()const;
108 bool is_valid()const;
110 //! Rounds time to the nearest frame for the given frame rate, \a fps
111 Time round(float fps)const;
113 bool is_equal(const Time& rhs)const { return (value_>rhs.value_)?value_-rhs.value_<=epsilon_():rhs.value_-value_<=epsilon_(); }
114 bool is_less_than(const Time& rhs)const { return rhs.value_-value_ > epsilon_(); }
115 bool is_more_than(const Time& rhs)const { return value_-rhs.value_ > epsilon_(); }
117 operator double()const { return value_; }
119 template<typename U> bool operator<(const U& rhs)const { return value_<rhs; }
120 template<typename U> bool operator>(const U& rhs)const { return value_>rhs; }
121 template<typename U> bool operator<=(const U& rhs)const { return value_<=rhs; }
122 template<typename U> bool operator>=(const U& rhs)const { return value_>=rhs; }
123 template<typename U> bool operator==(const U& rhs)const { return value_==rhs; }
124 template<typename U> bool operator!=(const U& rhs)const { return value_!=rhs; }
127 bool operator<(const Time& rhs)const { return value_<rhs.value_; }
128 bool operator>(const Time& rhs)const { return value_>rhs.value_; }
129 bool operator<=(const Time& rhs)const { return value_<=rhs.value_; }
130 bool operator>=(const Time& rhs)const { return value_>=rhs.value_; }
131 bool operator==(const Time& rhs)const { return value_==rhs.value_; }
132 bool operator!=(const Time& rhs)const { return value_!=rhs.value_; }
134 bool operator<(const Time& rhs)const { return is_less_than(rhs); }
135 bool operator>(const Time& rhs)const { return is_more_than(rhs); }
136 bool operator<=(const Time& rhs)const { return is_less_than(rhs)||is_equal(rhs); }
137 bool operator>=(const Time& rhs)const { return is_more_than(rhs)||is_equal(rhs); }
138 bool operator==(const Time& rhs)const { return is_equal(rhs); }
139 bool operator!=(const Time& rhs)const { return !is_equal(rhs); }
142 template<typename U> const Time& operator+=(const U &rhs) { value_+=static_cast<value_type>(rhs); return *this; }
143 template<typename U> const Time& operator-=(const U &rhs) { value_-=static_cast<value_type>(rhs); return *this; }
144 template<typename U> const Time& operator*=(const U &rhs) { value_*=static_cast<value_type>(rhs); return *this; }
145 template<typename U> const Time& operator/=(const U &rhs) { value_/=static_cast<value_type>(rhs); return *this; }
147 template<typename U> Time operator+(const U &rhs)const { return value_+static_cast<value_type>(rhs); }
148 template<typename U> Time operator-(const U &rhs)const { return value_-static_cast<value_type>(rhs); }
149 template<typename U> Time operator*(const U &rhs)const { return value_*static_cast<value_type>(rhs); }
150 template<typename U> Time operator/(const U &rhs)const { return value_/static_cast<value_type>(rhs); }
152 Time operator-()const { return -value_; }
153 }; // END of class Time
155 //! This operator allows the combining of Time::Format flags using the '|' operator
156 /*! \see Time::Format, Time::get_string() */
157 inline Time::Format operator|(Time::Format lhs, Time::Format rhs)
158 { return static_cast<Time::Format>((int)lhs|(int)rhs); }
160 //! This operator is for checking Time::Format flags.
161 /*! Don't think of it as "less then or equal to", but think of it
162 ** like an arrow. Is \a rhs inside of \a lhs ?
163 ** \see Time::Format, Time::get_string() */
164 inline bool operator<=(Time::Format lhs, Time::Format rhs)
165 { return (static_cast<int>(lhs) & static_cast<int>(rhs))==static_cast<int>(rhs); }
167 }; // END of namespace synfig
169 /* === E N D =============================================================== */