/*
 * CINELERRA
 * Copyright (C) 2008-2019 Adam Williams <broadcast at earthling dot net>
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 */


// A canvas for drawing a spectrogram on top of a filter envelope

#ifndef EQCANVAS_H
#define EQCANVAS_H

#include "compressortools.h"
#include "guicast.h"
#include "pluginclient.inc"
#include "pluginaclient.h"

class EQCanvas
{
public:
	EQCanvas(BC_WindowBase *parent, 
		int x, int y, int w, int h, 
		float min_db, float max_db);
	virtual ~EQCanvas();
	
	void initialize();
	void draw_grid();
	void update_spectrogram(CompressorFreqFrame *frame, 
		int offset, int size, int window_size);
	void draw_envelope(double *envelope, 
		int samplerate, int window_size, int is_top, int flash_it);
	
	BC_WindowBase *parent;
	BC_SubWindow *canvas;
	int x, y, w, h;
	int canvas_x, canvas_y;
	int canvas_w, canvas_h;
	float min_db, max_db;
// divisions for the frequency
	int freq_divisions;
// divisions for the DB
	int db_per_division;
	float pixels_per_division;
	int minor_divisions;
	int total_divisions;
};

#endif // EQCANVAS_H
