gtk2_ardour/utils.h

   1 /*
   2     Copyright (C) 2002 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #ifndef __ardour_gtk_utils_h__
  21 #define __ardour_gtk_utils_h__
  22
  23 #include <string>
  24 #include <cmath>
  25 #include <vector>
  26 #include <ardour/types.h>
  27 #include <libgnomecanvasmm/line.h>
  28 #include <gdkmm/types.h>
  29 #include <glibmm/ustring.h>
  30
  31 #include "canvas.h"
  32 #include "public_editor.h"
  33
  34 namespace Gtk {
  35         class Window;
  36         class ComboBoxText;
  37         class Paned;
  38 }
  39
  40 static inline double
  41 gain_to_slider_position (ARDOUR::gain_t g)
  42 {
  43         if (g == 0) return 0;
  44         return pow((6.0*log(g)/log(2.0)+192.0)/198.0, 8.0);
  45
  46 }
  47
  48 static inline ARDOUR::gain_t
  49 slider_position_to_gain (double pos)
  50 {
  51         /* XXX Marcus writes: this doesn't seem right to me. but i don't have a better answer ... */
  52         if (pos == 0.0) return 0;
  53         return pow (2.0,(sqrt(sqrt(sqrt(pos)))*198.0-192.0)/6.0);
  54 }
  55
  56 Glib::ustring fit_to_pixels (const Glib::ustring&, int pixel_width, Pango::FontDescription& font, int& actual_width, bool with_ellipses = false);
  57 int pixel_width (const Glib::ustring& str, Pango::FontDescription& font);
  58
  59 gint   just_hide_it (GdkEventAny*, Gtk::Window*);
  60 void   allow_keyboard_focus (bool);
  61
  62 unsigned char* xpm2rgb  (const char** xpm, uint32_t& w, uint32_t& h);
  63 unsigned char* xpm2rgba (const char** xpm, uint32_t& w, uint32_t& h);
  64
  65 ArdourCanvas::Points* get_canvas_points (std::string who, uint32_t npoints);
  66
  67 Pango::FontDescription* get_font_for_style (std::string widgetname);
  68
  69 uint32_t rgba_from_style (std::string, uint32_t, uint32_t, uint32_t, uint32_t, std::string = "fg", int = Gtk::STATE_NORMAL, bool = true);
  70
  71 Gdk::Color color_from_style (std::string widget_style_name, int state, std::string attr);
  72
  73 void decorate (Gtk::Window& w, Gdk::WMDecoration d);
  74
  75 bool canvas_item_visible (ArdourCanvas::Item* item);
  76
  77 void set_color (Gdk::Color&, int);
  78
  79 bool relay_key_press (GdkEventKey*, Gtk::Window*);
  80 bool key_press_focus_accelerator_handler (Gtk::Window& window, GdkEventKey* ev);
  81 bool possibly_translate_keyval_to_make_legal_accelerator (uint32_t& keyval);
  82
  83 Glib::RefPtr<Gdk::Pixbuf> get_xpm (std::string);
  84 Glib::RefPtr<Gdk::Pixbuf> get_icon (const char*);
  85 static std::map<std::string, Glib::RefPtr<Gdk::Pixbuf> > xpm_map;
  86 const char* const *get_xpm_data (std::string path);
  87 std::string longest (std::vector<std::string>&);
  88 bool key_is_legal_for_numeric_entry (guint keyval);
  89 void reset_dpi ();
  90 void set_pango_fontsize ();
  91
  92 inline guint8 convert_color_channel (guint8 src, guint8 alpha);
  93 void convert_bgra_to_rgba (guint8 const* src,
  94                       guint8*       dst,
  95                       int           width,
  96                       int           height);
  97 Glib::RefPtr<Gdk::Pixbuf> pixbuf_from_ustring (const Glib::ustring& name,
  98                                                Pango::FontDescription* font,
  99                                                uint32_t rgba,
 100                                                int clip_width,
 101                                                int clip_height);
 102
 103 #endif /* __ardour_gtk_utils_h__ */