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: #ifndef BOOLANIM_H_
nuclear@6: #define BOOLANIM_H_
nuclear@6: 
nuclear@6: class BoolAnim {
nuclear@6: private:
nuclear@6: 	mutable float value;
nuclear@6: 	mutable float trans_dir;	// transition direction (sign)
nuclear@6: 	long trans_start;	// transition start time
nuclear@6: 	long trans_dur;
nuclear@6: 
nuclear@6: 	long (*get_msec)();
nuclear@6: 
nuclear@6: 	void update(long tm) const;
nuclear@6: 
nuclear@6: public:
nuclear@6: 	BoolAnim(bool st = false);
nuclear@6: 
nuclear@6: 	void set_transition_duration(long dur);
nuclear@6: 	void set_time_callback(long (*time_func)());
nuclear@6: 
nuclear@6: 	void set(bool st);
nuclear@6: 
nuclear@6: 	void change(bool st);
nuclear@6: 	void change(bool st, long trans_start);
nuclear@6: 
nuclear@6: 	bool get_state() const;
nuclear@6: 	bool get_state(long tm) const;
nuclear@6: 
nuclear@6: 	float get_value() const;
nuclear@6: 	float get_value(long tm) const;
nuclear@6: 
nuclear@6: 	// transition direction (-1, 0, 1)
nuclear@6: 	float get_dir() const;
nuclear@6: 	float get_dir(long tm) const;
nuclear@6: 
nuclear@6: 	operator bool() const;	// equivalent to get_state
nuclear@6: 	operator float() const;	// equivalent to get_value
nuclear@6: };
nuclear@6: 
nuclear@6: #endif	// BOOLANIM_H_