2 Copyright (C) 2003 Paul Davis
4 This program is free software; you an 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.
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.
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.
21 #include "gtk2ardour-config.h"
24 #include <pango/pangoft2.h> // for fontmap resolution control for GnomeCanvas
25 #include <pango/pangocairo.h> // for fontmap resolution control for GnomeCanvas
36 #include <gtkmm/window.h>
37 #include <gtkmm/combo.h>
38 #include <gtkmm/label.h>
39 #include <gtkmm/paned.h>
40 #include <gtk/gtkpaned.h>
41 #include <boost/algorithm/string.hpp>
43 #include "pbd/file_utils.h"
45 #include <gtkmm2ext/utils.h>
46 #include "ardour/rc_configuration.h"
47 #include "ardour/filesystem_paths.h"
49 #include "canvas/item.h"
50 #include "canvas/utils.h"
52 #include "ardour_ui.h"
54 #include "public_editor.h"
58 #include "rgb_macros.h"
59 #include "gui_thread.h"
65 using Gtkmm2ext::Keyboard;
67 namespace ARDOUR_UI_UTILS {
68 sigc::signal<void> DPIReset;
71 #ifdef PLATFORM_WINDOWS
72 #define random() rand()
76 /** Add an element to a menu, settings its sensitivity.
77 * @param m Menu to add to.
78 * @param e Element to add.
79 * @param s true to make sensitive, false to make insensitive
82 ARDOUR_UI_UTILS::add_item_with_sensitivity (Menu_Helpers::MenuList& m, Menu_Helpers::MenuElem e, bool s)
86 m.back().set_sensitive (false);
92 ARDOUR_UI_UTILS::just_hide_it (GdkEventAny */*ev*/, Gtk::Window *win)
98 /* xpm2rgb copied from nixieclock, which bore the legend:
100 nixieclock - a nixie desktop timepiece
101 Copyright (C) 2000 Greg Ercolano, erco@3dsite.com
103 and was released under the GPL.
107 ARDOUR_UI_UTILS::xpm2rgb (const char** xpm, uint32_t& w, uint32_t& h)
109 static long vals[256], val;
110 uint32_t t, x, y, colors, cpp;
112 unsigned char *savergb, *rgb;
116 if ( sscanf(xpm[0], "%u%u%u%u", &w, &h, &colors, &cpp) != 4 ) {
117 error << string_compose (_("bad XPM header %1"), xpm[0])
122 savergb = rgb = (unsigned char*) malloc (h * w * 3);
124 // LOAD XPM COLORMAP LONG ENOUGH TO DO CONVERSION
125 for (t = 0; t < colors; ++t) {
126 sscanf (xpm[t+1], "%c c #%lx", &c, &val);
130 // COLORMAP -> RGB CONVERSION
131 // Get low 3 bytes from vals[]
135 for (y = h-1; y > 0; --y) {
137 for (p = xpm[1+colors+(h-y-1)], x = 0; x < w; x++, rgb += 3) {
138 val = vals[(int)*p++];
139 *(rgb+2) = val & 0xff; val >>= 8; // 2:B
140 *(rgb+1) = val & 0xff; val >>= 8; // 1:G
141 *(rgb+0) = val & 0xff; // 0:R
149 ARDOUR_UI_UTILS::xpm2rgba (const char** xpm, uint32_t& w, uint32_t& h)
151 static long vals[256], val;
152 uint32_t t, x, y, colors, cpp;
154 unsigned char *savergb, *rgb;
159 if ( sscanf(xpm[0], "%u%u%u%u", &w, &h, &colors, &cpp) != 4 ) {
160 error << string_compose (_("bad XPM header %1"), xpm[0])
165 savergb = rgb = (unsigned char*) malloc (h * w * 4);
167 // LOAD XPM COLORMAP LONG ENOUGH TO DO CONVERSION
169 if (strstr (xpm[1], "None")) {
170 sscanf (xpm[1], "%c", &transparent);
177 for (; t < colors; ++t) {
178 sscanf (xpm[t+1], "%c c #%lx", &c, &val);
182 // COLORMAP -> RGB CONVERSION
183 // Get low 3 bytes from vals[]
187 for (y = h-1; y > 0; --y) {
191 for (p = xpm[1+colors+(h-y-1)], x = 0; x < w; x++, rgb += 4) {
193 if (transparent && (*p++ == transparent)) {
201 *(rgb+3) = alpha; // 3: alpha
202 *(rgb+2) = val & 0xff; val >>= 8; // 2:B
203 *(rgb+1) = val & 0xff; val >>= 8; // 1:G
204 *(rgb+0) = val & 0xff; // 0:R
211 /** Returns a Pango::FontDescription given a string describing the font.
213 * If the returned FontDescription does not specify a family, then
214 * the family is set to "Sans". This mirrors GTK's behaviour in
217 * Some environments will force Pango to specify the family
218 * even if it was not specified in the string describing the font.
219 * Such environments should be left unaffected by this function,
220 * since the font family will be left alone.
222 * There may be other similar font specification enforcement
223 * that we might add here later.
225 Pango::FontDescription
226 ARDOUR_UI_UTILS::sanitized_font (std::string const& name)
228 Pango::FontDescription fd (name);
230 if (fd.get_family().empty()) {
231 fd.set_family ("Sans");
237 Pango::FontDescription
238 ARDOUR_UI_UTILS::get_font_for_style (string widgetname)
240 Gtk::Window window (WINDOW_TOPLEVEL);
242 Glib::RefPtr<Gtk::Style> style;
245 foobar.set_name (widgetname);
246 foobar.ensure_style();
248 style = foobar.get_style ();
250 Glib::RefPtr<const Pango::Layout> layout = foobar.get_layout();
252 PangoFontDescription *pfd = const_cast<PangoFontDescription *> (pango_layout_get_font_description(const_cast<PangoLayout *>(layout->gobj())));
256 /* layout inherited its font description from a PangoContext */
258 PangoContext* ctxt = (PangoContext*) pango_layout_get_context (const_cast<PangoLayout*>(layout->gobj()));
259 pfd = pango_context_get_font_description (ctxt);
260 return Pango::FontDescription (pfd); /* make a copy */
263 return Pango::FontDescription (pfd); /* make a copy */
267 ARDOUR_UI_UTILS::rgba_from_style (string style, uint32_t r, uint32_t g, uint32_t b, uint32_t a, string attr, int state, bool rgba)
269 /* In GTK+2, styles aren't set up correctly if the widget is not
270 attached to a toplevel window that has a screen pointer.
273 static Gtk::Window* window = 0;
276 window = new Window (WINDOW_TOPLEVEL);
283 foo.set_name (style);
286 GtkRcStyle* rc = foo.get_style()->gobj()->rc_style;
290 r = rc->fg[state].red / 257;
291 g = rc->fg[state].green / 257;
292 b = rc->fg[state].blue / 257;
294 /* what a hack ... "a" is for "active" */
295 if (state == Gtk::STATE_NORMAL && rgba) {
296 a = rc->fg[GTK_STATE_ACTIVE].red / 257;
298 } else if (attr == "bg") {
300 r = rc->bg[state].red / 257;
301 g = rc->bg[state].green / 257;
302 b = rc->bg[state].blue / 257;
303 } else if (attr == "base") {
304 r = rc->base[state].red / 257;
305 g = rc->base[state].green / 257;
306 b = rc->base[state].blue / 257;
307 } else if (attr == "text") {
308 r = rc->text[state].red / 257;
309 g = rc->text[state].green / 257;
310 b = rc->text[state].blue / 257;
313 warning << string_compose (_("missing RGBA style for \"%1\""), style) << endl;
318 if (state == Gtk::STATE_NORMAL && rgba) {
319 return (uint32_t) RGBA_TO_UINT(r,g,b,a);
321 return (uint32_t) RGBA_TO_UINT(r,g,b,255);
326 ARDOUR_UI_UTILS::rgba_p_from_style (string style, float *r, float *g, float *b, string attr, int state)
328 static Gtk::Window* window = 0;
329 assert (r && g && b);
332 window = new Window (WINDOW_TOPLEVEL);
339 foo.set_name (style);
342 GtkRcStyle* rc = foo.get_style()->gobj()->rc_style;
345 warning << string_compose (_("missing RGBA style for \"%1\""), style) << endl;
349 *r = rc->fg[state].red / 65535.0;
350 *g = rc->fg[state].green / 65535.0;
351 *b = rc->fg[state].blue / 65535.0;
352 } else if (attr == "bg") {
353 *r = rc->bg[state].red / 65535.0;
354 *g = rc->bg[state].green / 65535.0;
355 *b = rc->bg[state].blue / 65535.0;
356 } else if (attr == "base") {
357 *r = rc->base[state].red / 65535.0;
358 *g = rc->base[state].green / 65535.0;
359 *b = rc->base[state].blue / 65535.0;
360 } else if (attr == "text") {
361 *r = rc->text[state].red / 65535.0;
362 *g = rc->text[state].green / 65535.0;
363 *b = rc->text[state].blue / 65535.0;
373 ARDOUR_UI_UTILS::set_color_from_rgb (Gdk::Color& c, uint32_t rgb)
375 /* Gdk::Color color ranges are 16 bit, so scale from 8 bit by
378 c.set_rgb ((rgb >> 16)*256, ((rgb & 0xff00) >> 8)*256, (rgb & 0xff)*256);
382 ARDOUR_UI_UTILS::set_color_from_rgba (Gdk::Color& c, uint32_t rgba)
384 /* Gdk::Color color ranges are 16 bit, so scale from 8 bit by
387 c.set_rgb ((rgba >> 24)*256, ((rgba & 0xff0000) >> 16)*256, ((rgba & 0xff00) >> 8)*256);
391 ARDOUR_UI_UTILS::gdk_color_to_rgba (Gdk::Color const& c)
393 /* since alpha value is not available from a Gdk::Color, it is
394 hardcoded as 0xff (aka 255 or 1.0)
397 const uint32_t r = c.get_red_p () * 255.0;
398 const uint32_t g = c.get_green_p () * 255.0;
399 const uint32_t b = c.get_blue_p () * 255.0;
400 const uint32_t a = 0xff;
402 return RGBA_TO_UINT (r,g,b,a);
407 ARDOUR_UI_UTILS::relay_key_press (GdkEventKey* ev, Gtk::Window* win)
409 PublicEditor& ed (PublicEditor::instance());
411 if (!key_press_focus_accelerator_handler (*win, ev)) {
413 /* early key press in pre-main-window-dialogs, no editor yet */
416 return ed.on_key_press_event(ev);
423 ARDOUR_UI_UTILS::forward_key_press (GdkEventKey* ev)
425 return PublicEditor::instance().on_key_press_event(ev);
429 ARDOUR_UI_UTILS::emulate_key_event (Gtk::Widget* w, unsigned int keyval)
431 GdkDisplay *display = gtk_widget_get_display (GTK_WIDGET(w->gobj()));
432 GdkKeymap *keymap = gdk_keymap_get_for_display (display);
433 GdkKeymapKey *keymapkey = NULL;
436 if (!gdk_keymap_get_entries_for_keyval(keymap, keyval, &keymapkey, &n_keys)) return false;
437 if (n_keys !=1) { g_free(keymapkey); return false;}
440 ev.type = GDK_KEY_PRESS;
441 ev.window = gtk_widget_get_window(GTK_WIDGET(w->gobj()));
442 ev.send_event = FALSE;
447 ev.string = const_cast<gchar*> ("");
448 ev.hardware_keycode = keymapkey[0].keycode;
449 ev.group = keymapkey[0].group;
452 forward_key_press(&ev);
453 ev.type = GDK_KEY_RELEASE;
454 return forward_key_press(&ev);
458 ARDOUR_UI_UTILS::key_press_focus_accelerator_handler (Gtk::Window& window, GdkEventKey* ev)
460 GtkWindow* win = window.gobj();
461 GtkWidget* focus = gtk_window_get_focus (win);
462 bool special_handling_of_unmodified_accelerators = false;
463 bool allow_activating = true;
464 /* consider all relevant modifiers but not LOCK or SHIFT */
465 const guint mask = (Keyboard::RelevantModifierKeyMask & ~(Gdk::SHIFT_MASK|Gdk::LOCK_MASK));
468 if (GTK_IS_ENTRY(focus) || Keyboard::some_magic_widget_has_focus()) {
469 special_handling_of_unmodified_accelerators = true;
474 /* at one time this appeared to be necessary. As of July 2012, it does not
475 appear to be. if it ever is necessar, figure out if it should apply
479 if (Keyboard::some_magic_widget_has_focus ()) {
480 allow_activating = false;
486 DEBUG_TRACE (DEBUG::Accelerators, string_compose ("Win = %1 focus = %7 (%8) Key event: code = %2 state = %3 special handling ? %4 magic widget focus ? %5 allow_activation ? %6\n",
490 special_handling_of_unmodified_accelerators,
491 Keyboard::some_magic_widget_has_focus(),
494 (focus ? gtk_widget_get_name (focus) : "no focus widget")));
496 /* This exists to allow us to override the way GTK handles
497 key events. The normal sequence is:
499 a) event is delivered to a GtkWindow
500 b) accelerators/mnemonics are activated
501 c) if (b) didn't handle the event, propagate to
502 the focus widget and/or focus chain
504 The problem with this is that if the accelerators include
505 keys without modifiers, such as the space bar or the
506 letter "e", then pressing the key while typing into
507 a text entry widget results in the accelerator being
508 activated, instead of the desired letter appearing
511 There is no good way of fixing this, but this
512 represents a compromise. The idea is that
513 key events involving modifiers (not Shift)
514 get routed into the activation pathway first, then
515 get propagated to the focus widget if necessary.
517 If the key event doesn't involve modifiers,
518 we deliver to the focus widget first, thus allowing
519 it to get "normal text" without interference
522 Of course, this can also be problematic: if there
523 is a widget with focus, then it will swallow
524 all "normal text" accelerators.
527 if (!special_handling_of_unmodified_accelerators) {
529 /* XXX note that for a brief moment, the conditional above
530 * included "|| (ev->state & mask)" so as to enforce the
531 * implication of special_handling_of_UNMODIFIED_accelerators.
532 * however, this forces any key that GTK doesn't allow and that
533 * we have an alternative (see next comment) for to be
534 * automatically sent through the accel groups activation
535 * pathway, which prevents individual widgets & canvas items
536 * from ever seeing it if is used by a key binding.
538 * specifically, this hid Ctrl-down-arrow from MIDI region
539 * views because it is also bound to an action.
541 * until we have a robust, clean binding system, this
542 * quirk will have to remain in place.
545 /* pretend that certain key events that GTK does not allow
546 to be used as accelerators are actually something that
547 it does allow. but only where there are no modifiers.
550 uint32_t fakekey = ev->keyval;
552 if (Gtkmm2ext::possibly_translate_keyval_to_make_legal_accelerator (fakekey)) {
553 DEBUG_TRACE (DEBUG::Accelerators, string_compose ("\tactivate (was %1 now %2) without special hanlding of unmodified accels\n",
554 ev->keyval, fakekey));
556 GdkModifierType mod = GdkModifierType (ev->state);
558 mod = GdkModifierType (mod & gtk_accelerator_get_default_mod_mask());
560 /* GTK on OS X is currently (February 2012) setting both
561 the Meta and Mod2 bits in the event modifier state if
562 the Command key is down.
564 gtk_accel_groups_activate() does not invoke any of the logic
565 that gtk_window_activate_key() will that sorts out that stupid
566 state of affairs, and as a result it fails to find a match
567 for the key event and the current set of accelerators.
569 to fix this, if the meta bit is set, remove the mod2 bit
570 from the modifier. this assumes that our bindings use Primary
571 which will have set the meta bit in the accelerator entry.
573 if (mod & GDK_META_MASK) {
574 mod = GdkModifierType (mod & ~GDK_MOD2_MASK);
578 if (allow_activating && gtk_accel_groups_activate(G_OBJECT(win), fakekey, mod)) {
579 DEBUG_TRACE (DEBUG::Accelerators, "\taccel group activated by fakekey\n");
585 if (!special_handling_of_unmodified_accelerators || (ev->state & mask)) {
587 /* no special handling or there are modifiers in effect: accelerate first */
589 DEBUG_TRACE (DEBUG::Accelerators, "\tactivate, then propagate\n");
590 DEBUG_TRACE (DEBUG::Accelerators, string_compose ("\tevent send-event:%1 time:%2 length:%3 name %7 string:%4 hardware_keycode:%5 group:%6\n",
591 ev->send_event, ev->time, ev->length, ev->string, ev->hardware_keycode, ev->group, gdk_keyval_name (ev->keyval)));
593 if (allow_activating) {
594 DEBUG_TRACE (DEBUG::Accelerators, "\tsending to window\n");
595 if (gtk_window_activate_key (win, ev)) {
596 DEBUG_TRACE (DEBUG::Accelerators, "\t\thandled\n");
600 DEBUG_TRACE (DEBUG::Accelerators, "\tactivation skipped\n");
603 DEBUG_TRACE (DEBUG::Accelerators, "\tnot accelerated, now propagate\n");
605 return gtk_window_propagate_key_event (win, ev);
608 /* no modifiers, propagate first */
610 DEBUG_TRACE (DEBUG::Accelerators, "\tpropagate, then activate\n");
612 if (!gtk_window_propagate_key_event (win, ev)) {
613 DEBUG_TRACE (DEBUG::Accelerators, "\tpropagation didn't handle, so activate\n");
614 if (allow_activating) {
615 return gtk_window_activate_key (win, ev);
617 DEBUG_TRACE (DEBUG::Accelerators, "\tactivation skipped\n");
621 DEBUG_TRACE (DEBUG::Accelerators, "\thandled by propagate\n");
625 DEBUG_TRACE (DEBUG::Accelerators, "\tnot handled\n");
629 Glib::RefPtr<Gdk::Pixbuf>
630 ARDOUR_UI_UTILS::get_xpm (std::string name)
632 if (!xpm_map[name]) {
634 Searchpath spath(ARDOUR::ardour_data_search_path());
636 spath.add_subdirectory_to_paths("pixmaps");
638 std::string data_file_path;
640 if(!find_file (spath, name, data_file_path)) {
641 fatal << string_compose (_("cannot find XPM file for %1"), name) << endmsg;
645 xpm_map[name] = Gdk::Pixbuf::create_from_file (data_file_path);
646 } catch(const Glib::Error& e) {
647 warning << "Caught Glib::Error: " << e.what() << endmsg;
651 return xpm_map[name];
655 ARDOUR_UI_UTILS::get_icon_sets ()
657 Searchpath spath(ARDOUR::ardour_data_search_path());
658 spath.add_subdirectory_to_paths ("icons");
661 r.push_back (_("default"));
663 for (vector<string>::iterator s = spath.begin(); s != spath.end(); ++s) {
665 vector<string> entries;
667 get_paths (entries, *s, false, false);
669 for (vector<string>::iterator e = entries.begin(); e != entries.end(); ++e) {
670 if (Glib::file_test (*e, Glib::FILE_TEST_IS_DIR)) {
671 r.push_back (Glib::filename_to_utf8 (Glib::path_get_basename(*e)));
680 ARDOUR_UI_UTILS::get_icon_path (const char* cname, string icon_set, bool is_image)
682 std::string data_file_path;
689 Searchpath spath(ARDOUR::ardour_data_search_path());
691 if (!icon_set.empty() && icon_set != _("default")) {
693 /* add "icons/icon_set" but .. not allowed to add both of these at once */
694 spath.add_subdirectory_to_paths ("icons");
695 spath.add_subdirectory_to_paths (icon_set);
697 find_file (spath, name, data_file_path);
700 if (is_image && data_file_path.empty()) {
702 if (!icon_set.empty() && icon_set != _("default")) {
703 warning << string_compose (_("icon \"%1\" not found for icon set \"%2\", fallback to default"), cname, icon_set) << endmsg;
706 Searchpath def (ARDOUR::ardour_data_search_path());
707 def.add_subdirectory_to_paths ("icons");
709 if (!find_file (def, name, data_file_path)) {
710 fatal << string_compose (_("cannot find icon image for %1 using %2"), name, spath.to_string()) << endmsg;
711 abort(); /*NOTREACHED*/
715 return data_file_path;
718 Glib::RefPtr<Gdk::Pixbuf>
719 ARDOUR_UI_UTILS::get_icon (const char* cname, string icon_set)
721 Glib::RefPtr<Gdk::Pixbuf> img;
723 img = Gdk::Pixbuf::create_from_file (get_icon_path (cname, icon_set));
724 } catch (const Gdk::PixbufError &e) {
725 cerr << "Caught PixbufError: " << e.what() << endl;
727 error << string_compose (_("Caught exception while loading icon named %1"), cname) << endmsg;
733 namespace ARDOUR_UI_UTILS {
734 Glib::RefPtr<Gdk::Pixbuf>
735 get_icon (const char* cname)
737 Glib::RefPtr<Gdk::Pixbuf> img;
739 img = Gdk::Pixbuf::create_from_file (get_icon_path (cname));
740 } catch (const Gdk::PixbufError &e) {
741 cerr << "Caught PixbufError: " << e.what() << endl;
743 error << string_compose (_("Caught exception while loading icon named %1"), cname) << endmsg;
751 ARDOUR_UI_UTILS::longest (vector<string>& strings)
753 if (strings.empty()) {
757 vector<string>::iterator longest = strings.begin();
758 string::size_type longest_length = (*longest).length();
760 vector<string>::iterator i = longest;
763 while (i != strings.end()) {
765 string::size_type len = (*i).length();
767 if (len > longest_length) {
769 longest_length = len;
779 ARDOUR_UI_UTILS::key_is_legal_for_numeric_entry (guint keyval)
781 /* we assume that this does not change over the life of the process
784 static int comma_decimal = -1;
789 if (comma_decimal < 0) {
790 std::lconv* lc = std::localeconv();
791 if (strchr (lc->decimal_point, ',') != 0) {
803 case GDK_decimalpoint:
804 case GDK_KP_Separator:
834 case GDK_KP_Subtract:
864 ARDOUR_UI_UTILS::set_pango_fontsize ()
866 long val = ARDOUR::Config->get_font_scale();
868 /* FT2 rendering - used by GnomeCanvas, sigh */
870 #ifndef PLATFORM_WINDOWS
871 pango_ft2_font_map_set_resolution ((PangoFT2FontMap*) pango_ft2_font_map_new(), val/1024, val/1024);
874 /* Cairo rendering, in case there is any */
876 pango_cairo_font_map_set_resolution ((PangoCairoFontMap*) pango_cairo_font_map_get_default(), val/1024);
880 ARDOUR_UI_UTILS::reset_dpi ()
882 long val = ARDOUR::Config->get_font_scale();
883 set_pango_fontsize ();
886 gtk_settings_set_long_property (gtk_settings_get_default(),
887 "gtk-xft-dpi", val, "ardour");
888 DPIReset();//Emit Signal
892 ARDOUR_UI_UTILS::resize_window_to_proportion_of_monitor (Gtk::Window* window, int max_width, int max_height)
894 Glib::RefPtr<Gdk::Screen> screen = window->get_screen ();
895 Gdk::Rectangle monitor_rect;
896 screen->get_monitor_geometry (0, monitor_rect);
898 int const w = std::min (int (monitor_rect.get_width() * 0.8), max_width);
899 int const h = std::min (int (monitor_rect.get_height() * 0.8), max_height);
901 window->resize (w, h);
905 /** Replace _ with __ in a string; for use with menu item text to make underscores displayed correctly */
907 ARDOUR_UI_UTILS::escape_underscores (string const & s)
910 string::size_type const N = s.length ();
912 for (string::size_type i = 0; i < N; ++i) {
923 /** Replace < and > with < and > respectively to make < > display correctly in markup strings */
925 ARDOUR_UI_UTILS::escape_angled_brackets (string const & s)
928 boost::replace_all (o, "<", "<");
929 boost::replace_all (o, ">", ">");
934 ARDOUR_UI_UTILS::unique_random_color (list<Gdk::Color>& used_colors)
942 h = fmod (random(), 360.0);
943 s = (random() % 65535) / 65535.0;
944 v = (random() % 65535) / 65535.0;
946 s = min (0.5, s); /* not too saturated */
947 v = max (0.9, v); /* not too bright */
948 newcolor.set_hsv (h, s, v);
950 if (used_colors.size() == 0) {
951 used_colors.push_back (newcolor);
955 for (list<Gdk::Color>::iterator i = used_colors.begin(); i != used_colors.end(); ++i) {
957 float rdelta, bdelta, gdelta;
959 rdelta = newcolor.get_red() - c.get_red();
960 bdelta = newcolor.get_blue() - c.get_blue();
961 gdelta = newcolor.get_green() - c.get_green();
963 if (sqrt (rdelta*rdelta + bdelta*bdelta + gdelta*gdelta) > 25.0) {
964 /* different enough */
965 used_colors.push_back (newcolor);
970 /* XXX need throttle here to make sure we don't spin for ever */
975 ARDOUR_UI_UTILS::rate_as_string (float r)
978 if (fmod (r, 1000.0f)) {
979 snprintf (buf, sizeof (buf), "%.1f kHz", r/1000.0);
981 snprintf (buf, sizeof (buf), "%.0f kHz", r/1000.0);