livetrax/libs/gtkmm2ext/gtkmm2ext/fastmeter.h

/*
    Copyright (C) 2003 Paul Davis

    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., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#ifndef __gtkmm2ext_fastmeter_h__
#define __gtkmm2ext_fastmeter_h__

#include <map>
#include <boost/tuple/tuple.hpp>
#include <boost/tuple/tuple_comparison.hpp>
#include <cairomm/pattern.h>
#include <gtkmm/drawingarea.h>
#include <gdkmm/pixbuf.h>

namespace Gtkmm2ext {

class FastMeter : public Gtk::DrawingArea {
  public:
	enum Orientation {
		Horizontal,
		Vertical
	};

	FastMeter (long hold_cnt, unsigned long width, Orientation, int len=0,
			int clr0=0x008800ff, int clr1=0x008800ff,
			int clr2=0x00ff00ff, int clr3=0x00ff00ff,
			int clr4=0xffaa00ff, int clr5=0xffaa00ff,
			int clr6=0xffff00ff, int clr7=0xffff00ff,
			int clr8=0xff0000ff, int clr9=0xff0000ff,
			int bgc0=0x333333ff, int bgc1=0x444444ff,
			int bgh0=0x991122ff, int bgh1=0x551111ff,
			float stp0 = 55.0, // log_meter(-18);
			float stp1 = 77.5, // log_meter(-9);
			float stp2 = 92.5, // log_meter(-3); // 95.0, // log_meter(-2);
			float stp3 = 100.0
			);
	virtual ~FastMeter ();

	void set (float level, float peak = -1);
	void clear ();

	float get_level() { return current_level; }
	float get_user_level() { return current_user_level; }
	float get_peak() { return current_peak; }

	long hold_count() { return hold_cnt; }
	void set_hold_count (long);
	void set_highlight (bool);
	bool get_highlight () { return highlight; }

protected:
	bool on_expose_event (GdkEventExpose*);
	void on_size_request (GtkRequisition*);
	void on_size_allocate (Gtk::Allocation&);

private:

	Cairo::RefPtr<Cairo::Pattern> fgpattern;
	Cairo::RefPtr<Cairo::Pattern> bgpattern;
	gint pixheight;
	gint pixwidth;

	float _stp[4];
	int _clr[10];
	int _bgc[2];
	int _bgh[2];

	Orientation orientation;
	GdkRectangle pixrect;
	GdkRectangle last_peak_rect;
	gint request_width;
	gint request_height;
	unsigned long hold_cnt;
	unsigned long hold_state;
	bool bright_hold;
	float current_level;
	float current_peak;
	float current_user_level;
	bool highlight;

	bool vertical_expose (GdkEventExpose*);
	void queue_vertical_redraw (const Glib::RefPtr<Gdk::Window>&, float);

	static bool no_rgba_overlay;

	static Cairo::RefPtr<Cairo::Pattern> generate_meter_pattern (
		int w, int h, int *clr, float *stp, bool shade);
	static Cairo::RefPtr<Cairo::Pattern> request_vertical_meter (
		int w, int h, int *clr, float *stp, bool shade);

	static Cairo::RefPtr<Cairo::Pattern> generate_meter_background (
		int w, int h, int *bgc, bool shade);
	static Cairo::RefPtr<Cairo::Pattern> request_vertical_background (
		int w, int h, int *bgc, bool shade);

	struct Pattern10MapKey {
		Pattern10MapKey (
				int w, int h,
				float stp0, float stp1, float stp2, float stp3,
				int c0, int c1, int c2, int c3,
				int c4, int c5, int c6, int c7,
				int c8, int c9
				)
			: dim(w, h)
			, stp(stp0, stp1, stp2, stp3)
			, cols(c0, c1, c2, c3, c4, c5, c6, c7, c8, c9)
		{}
		inline bool operator<(const Pattern10MapKey& rhs) const {
			return (dim < rhs.dim)
				|| (dim == rhs.dim && stp < rhs.stp)
				|| (dim == rhs.dim && stp == rhs.stp && cols < rhs.cols);
		}
		boost::tuple<int, int> dim;
		boost::tuple<float, float, float, float> stp;
		boost::tuple<int, int, int, int, int, int, int, int, int, int> cols;
	};
	typedef std::map<Pattern10MapKey, Cairo::RefPtr<Cairo::Pattern> > Pattern10Map;

	struct PatternBgMapKey {
		PatternBgMapKey (int w, int h, int c0, int c1)
			: dim(w, h)
			, cols(c0, c1)
		{}
		inline bool operator<(const PatternBgMapKey& rhs) const {
			return (dim < rhs.dim) || (dim == rhs.dim && cols < rhs.cols);
		}
		boost::tuple<int, int> dim;
		boost::tuple<int, int> cols;
	};
	typedef std::map<PatternBgMapKey, Cairo::RefPtr<Cairo::Pattern> > PatternBgMap;

	static Pattern10Map vm_pattern_cache;
	static PatternBgMap vb_pattern_cache;
	static int min_pattern_metric_size; // min dimension for axis that displays the meter level
	static int max_pattern_metric_size; // max dimension for axis that displays the meter level
};


} /* namespace */

 #endif /* __gtkmm2ext_fastmeter_h__ */