// copyright Min Zhong, cs838 proj2, April, 2000


#ifndef RUNBUTTON_H
#define RUNBUTTON_H

// $Header: /p/graphics/CVS/638/Web/Examples/GL/RunButton.H,v 1.1 1999/10/20 16:25:04 gleicher Exp $
// written October, 1999 by Michael L. Gleicher
//
// CS638 Example code - this provides a utility routine to help with animation
//
// This file implements a "play" button. The idea is that you creat a window that
// does your drawing. When redrawing, this window looks at a slider to see what
// time it is, so it knows what part of the animation to draw.
//
// The slider must call the window's redraw function whenever the time changes.
//
// The play button, when pressed, advances the slider forward a timestep continually.
// In order to do this, it installs itself in the FlTk "Idle" loop so it gets called
// periodically.
//
// See the Simple4.cpp program for an example of how to use this


#include "proj2.h"


// the time slider
// the only thing it does is create itself. all of its work happens
// in a callback it installs
class RunSlider  : public Fl_Value_Slider {
public:
	RunSlider(Fl_Widget* draw,		// what needs to be told to redraw
				  int len,			// how many frames is the animation
				  int x, int y, int w,int h);		// standard slider parameters  
  };

// the run button - advances the slider periodically
// note: this is hard coded to 30 frames per second
class RunButton : public Fl_Light_Button {
public:
	RunButton(Fl_Slider* time,		// what to advance
				int x, int y, int w, int h, 
				double in_frame_time, PLAYMODE in_mode);
	~RunButton();				// remove the idle function

	// init tick counters, called every time a new first motion file loaded
	init_ticks(double in_frame_time, PLAYMODE in_mode);
	
	Fl_Slider*	slider;			// need to remember this	
	int			frame_cnt;
	long		lastRedraw;		// time of last redraw
	int			firstRedraw;
	double		ticks_per_frame;	// frame time in # clk ticks
	double		ticks_tot;			// tot # clk ticks for playing entire seq
	PLAYMODE	mode;
	};



//
// this callback function is the "guts" of the RunButton -
// notice that it is an "idle" callback, not a widget callback
//
// another nice problem to have - most likely, we'll be too fast
// don't draw more than 30 times per second
void runButtonCB(RunButton* b);


// this is the regular fltk callback
void runCB(Fl_Widget* wid, Fl_Widget* o);

// which frame we are on
void runSliderCB(Fl_Widget *in_slider, Fl_Widget *in_wind);

#endif