nuclear@6: /*
nuclear@6: GoatKit - a themable/animated widget toolkit for games
nuclear@6: Copyright (C) 2014  John Tsiombikas <nuclear@member.fsf.org>
nuclear@6: 
nuclear@6: This program is free software: you can redistribute it and/or modify
nuclear@6: it under the terms of the GNU Lesser General Public License as published by
nuclear@6: the Free Software Foundation, either version 3 of the License, or
nuclear@6: (at your option) any later version.
nuclear@6: 
nuclear@6: This program is distributed in the hope that it will be useful,
nuclear@6: but WITHOUT ANY WARRANTY; without even the implied warranty of
nuclear@6: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nuclear@6: GNU Lesser General Public License for more details.
nuclear@6: 
nuclear@6: You should have received a copy of the GNU Lesser General Public License
nuclear@6: along with this program.  If not, see <http://www.gnu.org/licenses/>.
nuclear@6: */
nuclear@6: #include "boolanm.h"
nuclear@6: 
nuclear@6: static long default_get_msec();
nuclear@6: 
nuclear@6: BoolAnim::BoolAnim(bool st)
nuclear@6: {
nuclear@6: 	set(st);
nuclear@6: 	trans_start = 0;
nuclear@6: 	trans_dur = 500;
nuclear@6: 	get_msec = default_get_msec;
nuclear@6: }
nuclear@6: 
nuclear@6: void BoolAnim::update(long tm) const
nuclear@6: {
nuclear@6: 	if(trans_dir == 0.0) return;
nuclear@6: 
nuclear@6: 	float dt = (tm - trans_start) / 1000.0;
nuclear@6: 	float t = dt / (trans_dur / 1000.0);
nuclear@6: 
nuclear@6: 	if(trans_dir > 0.0) {
nuclear@6: 		value = t;
nuclear@6: 	} else {
nuclear@6: 		value = 1.0 - t;
nuclear@6: 	}
nuclear@6: 
nuclear@6: 	if(value < 0.0) {
nuclear@6: 		value = 0.0;
nuclear@6: 		trans_dir = 0.0;
nuclear@6: 	} else if(value > 1.0) {
nuclear@6: 		value = 1.0;
nuclear@6: 		trans_dir = 0.0;
nuclear@6: 	}
nuclear@6: }
nuclear@6: 
nuclear@6: void BoolAnim::set_transition_duration(long dur)
nuclear@6: {
nuclear@6: 	trans_dur = dur;
nuclear@6: }
nuclear@6: 
nuclear@6: void BoolAnim::set_time_callback(long (*time_func)())
nuclear@6: {
nuclear@6: 	get_msec = time_func;
nuclear@6: }
nuclear@6: 
nuclear@6: void BoolAnim::set(bool st)
nuclear@6: {
nuclear@6: 	value = st ? 1.0 : 0.0;
nuclear@6: 	trans_dir = 0.0;
nuclear@6: }
nuclear@6: 
nuclear@6: void BoolAnim::change(bool st)
nuclear@6: {
nuclear@6: 	change(st, get_msec());
nuclear@6: }
nuclear@6: 
nuclear@6: void BoolAnim::change(bool st, long tm)
nuclear@6: {
nuclear@6: 	trans_dir = st ? 1.0 : -1.0;
nuclear@6: 	trans_start = tm;
nuclear@6: }
nuclear@6: 
nuclear@6: bool BoolAnim::get_state() const
nuclear@6: {
nuclear@6: 	return get_state(get_msec());
nuclear@6: }
nuclear@6: 
nuclear@6: bool BoolAnim::get_state(long tm) const
nuclear@6: {
nuclear@6: 	update(tm);
nuclear@6: 
nuclear@6: 	// if we're not in transition use the value (should be 0 or 1)
nuclear@6: 	if(trans_dir == 0.0) {
nuclear@6: 		return value > 0.5;
nuclear@6: 	}
nuclear@6: 
nuclear@6: 	// if we're in transition base it on the direction of the transition
nuclear@6: 	return trans_dir > 0.0;
nuclear@6: }
nuclear@6: 
nuclear@6: float BoolAnim::get_value() const
nuclear@6: {
nuclear@6: 	return get_value(get_msec());
nuclear@6: }
nuclear@6: 
nuclear@6: float BoolAnim::get_value(long tm) const
nuclear@6: {
nuclear@6: 	update(tm);
nuclear@6: 	return value;
nuclear@6: }
nuclear@6: 
nuclear@6: float BoolAnim::get_dir() const
nuclear@6: {
nuclear@6: 	return get_dir(get_msec());
nuclear@6: }
nuclear@6: 
nuclear@6: float BoolAnim::get_dir(long tm) const
nuclear@6: {
nuclear@6: 	update(tm);
nuclear@6: 	return trans_dir;
nuclear@6: }
nuclear@6: 
nuclear@6: BoolAnim::operator bool() const
nuclear@6: {
nuclear@6: 	return get_state();
nuclear@6: }
nuclear@6: 
nuclear@6: BoolAnim::operator float() const
nuclear@6: {
nuclear@6: 	return get_value();
nuclear@6: }
nuclear@6: 
nuclear@6: #ifdef WIN32
nuclear@6: #include <windows.h>
nuclear@6: 
nuclear@6: static long default_get_msec()
nuclear@6: {
nuclear@6: 	return GetTickCount();
nuclear@6: }
nuclear@6: #else
nuclear@6: #include <sys/time.h>
nuclear@6: 
nuclear@6: static long default_get_msec()
nuclear@6: {
nuclear@6: 	static struct timeval tv0;
nuclear@6: 	struct timeval tv;
nuclear@6: 
nuclear@6: 	gettimeofday(&tv, 0);
nuclear@6: 	if(tv0.tv_sec == 0 && tv0.tv_usec == 0) {
nuclear@6: 		tv0 = tv;
nuclear@6: 		return 0;
nuclear@6: 	}
nuclear@6: 	return (tv.tv_sec - tv0.tv_sec) * 1000 + (tv.tv_usec - tv0.tv_usec) / 1000;
nuclear@6: }
nuclear@6: #endif