fft_graph.h

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/*
    Copyright (C) 2006 Paul Davis
    Author: Sampo Savoleinen

    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 __ardour_fft_graph_h
#define __ardour_fft_graph_h

#include "ardour/types.h"
#include <fftw3.h>

#include <gtkmm/drawingarea.h>
#include <gtkmm/treemodel.h>
#include <gdkmm/color.h>

#include <glibmm/refptr.h>

#include <string>

#include "fft_result.h"

class AnalysisWindow;

class FFTGraph : public Gtk::DrawingArea
{
        public:

                FFTGraph(int windowSize);
                ~FFTGraph();

                void set_analysis_window(AnalysisWindow *a_window);

                int windowSize() const { return _windowSize; }
                void setWindowSize(int windowSize);

                void redraw();
                bool on_expose_event (GdkEventExpose* event);

                void on_size_request(Gtk::Requisition* requisition);
                void on_size_allocate(Gtk::Allocation & alloc);
                FFTResult *prepareResult(Gdk::Color color, std::string trackname);

                void set_show_minmax     (bool v) { _show_minmax     = v; redraw(); }
                void set_show_normalized (bool v) { _show_normalized = v; redraw(); }

        private:

                void update_size();

                void setWindowSize_internal(int windowSize);

                void draw_scales(Glib::RefPtr<Gdk::Window> window);

                static const int minScaleWidth = 512;
                static const int minScaleHeight = 420;

                int currentScaleWidth;
                int currentScaleHeight;

                static const int h_margin = 20;
                static const int v_margin = 20;
                Glib::RefPtr<Gdk::GC> graph_gc;

                int width;
                int height;

                int _windowSize;
                int _dataSize;

                Glib::RefPtr<Pango::Layout> layout;
                AnalysisWindow *_a_window;

                fftwf_plan _plan;

                float *_out;
                float *_in;
                float *_hanning;
                int *_logScale;

                bool _show_minmax;
                bool _show_normalized;

        friend class FFTResult;
};

#endif /* __ardour_fft_graph_h */