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annotate libs/goatkit/boolanm.cc @ 20:2b85d05df3f2

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animation controls for easier screenshot grabbing
author John Tsiombikas <nuclear@member.fsf.org>
date Fri, 02 Oct 2015 04:54:55 +0300
parents 3bccfc7d10fe
children
rev   line source
nuclear@6 1 /*
nuclear@6 2 GoatKit - a themable/animated widget toolkit for games
nuclear@6 3 Copyright (C) 2014 John Tsiombikas <nuclear@member.fsf.org>
nuclear@6 4
nuclear@6 5 This program is free software: you can redistribute it and/or modify
nuclear@6 6 it under the terms of the GNU Lesser General Public License as published by
nuclear@6 7 the Free Software Foundation, either version 3 of the License, or
nuclear@6 8 (at your option) any later version.
nuclear@6 9
nuclear@6 10 This program is distributed in the hope that it will be useful,
nuclear@6 11 but WITHOUT ANY WARRANTY; without even the implied warranty of
nuclear@6 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
nuclear@6 13 GNU Lesser General Public License for more details.
nuclear@6 14
nuclear@6 15 You should have received a copy of the GNU Lesser General Public License
nuclear@6 16 along with this program. If not, see <http://www.gnu.org/licenses/>.
nuclear@6 17 */
nuclear@6 18 #include "boolanm.h"
nuclear@6 19
nuclear@6 20 static long default_get_msec();
nuclear@6 21
nuclear@6 22 BoolAnim::BoolAnim(bool st)
nuclear@6 23 {
nuclear@6 24 set(st);
nuclear@6 25 trans_start = 0;
nuclear@6 26 trans_dur = 500;
nuclear@6 27 get_msec = default_get_msec;
nuclear@6 28 }
nuclear@6 29
nuclear@6 30 void BoolAnim::update(long tm) const
nuclear@6 31 {
nuclear@6 32 if(trans_dir == 0.0) return;
nuclear@6 33
nuclear@6 34 float dt = (tm - trans_start) / 1000.0;
nuclear@6 35 float t = dt / (trans_dur / 1000.0);
nuclear@6 36
nuclear@6 37 if(trans_dir > 0.0) {
nuclear@6 38 value = t;
nuclear@6 39 } else {
nuclear@6 40 value = 1.0 - t;
nuclear@6 41 }
nuclear@6 42
nuclear@6 43 if(value < 0.0) {
nuclear@6 44 value = 0.0;
nuclear@6 45 trans_dir = 0.0;
nuclear@6 46 } else if(value > 1.0) {
nuclear@6 47 value = 1.0;
nuclear@6 48 trans_dir = 0.0;
nuclear@6 49 }
nuclear@6 50 }
nuclear@6 51
nuclear@6 52 void BoolAnim::set_transition_duration(long dur)
nuclear@6 53 {
nuclear@6 54 trans_dur = dur;
nuclear@6 55 }
nuclear@6 56
nuclear@14 57 long BoolAnim::get_transition_duration() const
nuclear@14 58 {
nuclear@14 59 return trans_dur;
nuclear@14 60 }
nuclear@14 61
nuclear@6 62 void BoolAnim::set_time_callback(long (*time_func)())
nuclear@6 63 {
nuclear@6 64 get_msec = time_func;
nuclear@6 65 }
nuclear@6 66
nuclear@6 67 void BoolAnim::set(bool st)
nuclear@6 68 {
nuclear@6 69 value = st ? 1.0 : 0.0;
nuclear@6 70 trans_dir = 0.0;
nuclear@6 71 }
nuclear@6 72
nuclear@6 73 void BoolAnim::change(bool st)
nuclear@6 74 {
nuclear@6 75 change(st, get_msec());
nuclear@6 76 }
nuclear@6 77
nuclear@6 78 void BoolAnim::change(bool st, long tm)
nuclear@6 79 {
nuclear@6 80 trans_dir = st ? 1.0 : -1.0;
nuclear@6 81 trans_start = tm;
nuclear@6 82 }
nuclear@6 83
nuclear@6 84 bool BoolAnim::get_state() const
nuclear@6 85 {
nuclear@6 86 return get_state(get_msec());
nuclear@6 87 }
nuclear@6 88
nuclear@6 89 bool BoolAnim::get_state(long tm) const
nuclear@6 90 {
nuclear@6 91 update(tm);
nuclear@6 92
nuclear@6 93 // if we're not in transition use the value (should be 0 or 1)
nuclear@6 94 if(trans_dir == 0.0) {
nuclear@6 95 return value > 0.5;
nuclear@6 96 }
nuclear@6 97
nuclear@6 98 // if we're in transition base it on the direction of the transition
nuclear@6 99 return trans_dir > 0.0;
nuclear@6 100 }
nuclear@6 101
nuclear@6 102 float BoolAnim::get_value() const
nuclear@6 103 {
nuclear@6 104 return get_value(get_msec());
nuclear@6 105 }
nuclear@6 106
nuclear@6 107 float BoolAnim::get_value(long tm) const
nuclear@6 108 {
nuclear@6 109 update(tm);
nuclear@6 110 return value;
nuclear@6 111 }
nuclear@6 112
nuclear@6 113 float BoolAnim::get_dir() const
nuclear@6 114 {
nuclear@6 115 return get_dir(get_msec());
nuclear@6 116 }
nuclear@6 117
nuclear@6 118 float BoolAnim::get_dir(long tm) const
nuclear@6 119 {
nuclear@6 120 update(tm);
nuclear@6 121 return trans_dir;
nuclear@6 122 }
nuclear@6 123
nuclear@6 124 BoolAnim::operator bool() const
nuclear@6 125 {
nuclear@6 126 return get_state();
nuclear@6 127 }
nuclear@6 128
nuclear@6 129 BoolAnim::operator float() const
nuclear@6 130 {
nuclear@6 131 return get_value();
nuclear@6 132 }
nuclear@6 133
nuclear@6 134 #ifdef WIN32
nuclear@6 135 #include <windows.h>
nuclear@6 136
nuclear@6 137 static long default_get_msec()
nuclear@6 138 {
nuclear@6 139 return GetTickCount();
nuclear@6 140 }
nuclear@6 141 #else
nuclear@6 142 #include <sys/time.h>
nuclear@6 143
nuclear@6 144 static long default_get_msec()
nuclear@6 145 {
nuclear@6 146 static struct timeval tv0;
nuclear@6 147 struct timeval tv;
nuclear@6 148
nuclear@6 149 gettimeofday(&tv, 0);
nuclear@6 150 if(tv0.tv_sec == 0 && tv0.tv_usec == 0) {
nuclear@6 151 tv0 = tv;
nuclear@6 152 return 0;
nuclear@6 153 }
nuclear@6 154 return (tv.tv_sec - tv0.tv_sec) * 1000 + (tv.tv_usec - tv0.tv_usec) / 1000;
nuclear@6 155 }
nuclear@6 156 #endif