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    Copyright (C) 2002 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
    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.

    $Id: utils.h,v 1.13 2005/02/04 05:24:46 pauld Exp $

#ifndef __ardour_gtk_utils_h__
#define __ardour_gtk_utils_h__

#include <string>
#include <vector>
#include <cmath>
#include <ardour/types.h>
#include <gtk-canvas/gtk-canvas.h>
#include <gtk--/window.h>
#include <gtk--/combo.h>

static inline double 
gain_to_slider_position (ARDOUR::gain_t g)
      if (g == 0) return 0;
      return pow((6.0*log(g)/log(2.0)+192.0)/198.0, 8.0);


static inline ARDOUR::gain_t 
slider_position_to_gain (double pos)
      /* XXX Marcus writes: this doesn't seem right to me. but i don't have a better answer ... */
      return pow (2.0,(sqrt(sqrt(sqrt(pos)))*198.0-192.0)/6.0);

std::string short_version (std::string, std::string::size_type target_length);
std::string fit_to_pixels (std::string, int32_t pixel_width, Gdk_Font&);

int    atoi (const std::string&);
double atof (const std::string&);
void   strip_whitespace_edges (std::string& str);
void   url_decode (std::string&);
gint   just_hide_it (GdkEventAny*, Gtk::Window*);
void   allow_keyboard_focus (bool);

unsigned char* xpm2rgb  (const char** xpm, uint32_t& w, uint32_t& h);
unsigned char* xpm2rgba (const char** xpm, uint32_t& w, uint32_t& h);

GtkCanvasPoints* get_canvas_points (std::string who, uint32_t npoints);

int channel_combo_get_channel_count (Gtk::Combo& combo);
std::string get_font_for_style (std::string widgetname);

#endif /* __ardour_gtk_utils_h__ */

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