gtk2_ardour/axis_view.cc

   1 /*
   2     Copyright (C) 2003 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 #include <cstdlib>
  21 #include <cmath>
  22
  23 #include <algorithm>
  24 #include <string>
  25
  26 #include <list>
  27
  28 #include "pbd/error.h"
  29
  30 #include <gtkmm2ext/utils.h>
  31 #include <gtkmm2ext/selector.h>
  32 #include <gtkmm2ext/gtk_ui.h>
  33
  34 #include "ardour/session.h"
  35 #include "ardour/utils.h"
  36
  37 #include "public_editor.h"
  38 #include "ardour_ui.h"
  39 #include "gui_object.h"
  40 #include "axis_view.h"
  41 #include "i18n.h"
  42
  43 using namespace std;
  44 using namespace Gtk;
  45 using namespace Gtkmm2ext;
  46 using namespace ARDOUR;
  47
  48 list<Gdk::Color> AxisView::used_colors;
  49
  50 AxisView::AxisView (ARDOUR::Session* sess)
  51         : SessionHandlePtr (sess)
  52 {
  53         _selected = false;
  54 }
  55
  56 AxisView::~AxisView()
  57 {
  58 }
  59
  60 Gdk::Color
  61 AxisView::unique_random_color()
  62 {
  63         Gdk::Color newcolor;
  64
  65         while (1) {
  66
  67                 /* avoid neon/glowing tones by limiting them to the
  68                    "inner section" (paler) of a color wheel/circle.
  69                 */
  70
  71                 const int32_t max_saturation = 48000; // 65535 would open up the whole color wheel
  72
  73                 newcolor.set_red (random() % max_saturation);
  74                 newcolor.set_blue (random() % max_saturation);
  75                 newcolor.set_green (random() % max_saturation);
  76
  77                 if (used_colors.size() == 0) {
  78                         used_colors.push_back (newcolor);
  79                         return newcolor;
  80                 }
  81
  82                 for (list<Gdk::Color>::iterator i = used_colors.begin(); i != used_colors.end(); ++i) {
  83                   Gdk::Color c = *i;
  84                         float rdelta, bdelta, gdelta;
  85
  86                         rdelta = newcolor.get_red() - c.get_red();
  87                         bdelta = newcolor.get_blue() - c.get_blue();
  88                         gdelta = newcolor.get_green() - c.get_green();
  89
  90                         if (sqrt (rdelta*rdelta + bdelta*bdelta + gdelta*gdelta) > 25.0) {
  91                                 used_colors.push_back (newcolor);
  92                                 return newcolor;
  93                         }
  94                 }
  95
  96                 /* XXX need throttle here to make sure we don't spin for ever */
  97         }
  98 }
  99
 100 string
 101 AxisView::gui_property (const string& property_name) const
 102 {
 103         return gui_object_state().get_string (state_id(), property_name);
 104 }
 105
 106 bool
 107 AxisView::marked_for_display () const
 108 {
 109         string const v = gui_property ("visible");
 110         return (v == "" || string_is_affirmative (v));
 111 }
 112
 113 bool
 114 AxisView::set_marked_for_display (bool yn)
 115 {
 116         if (yn != marked_for_display()) {
 117                 if (yn) {
 118                         set_gui_property ("visible", true);
 119                 } else {
 120                         set_gui_property ("visible", false);
 121                 }
 122                 return true; // things changed
 123         }
 124
 125         return false;
 126 }
 127
 128 GUIObjectState&
 129 AxisView::gui_object_state()
 130 {
 131         return *ARDOUR_UI::instance()->gui_object_state;
 132 }