X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=gtk2_ardour%2Futils.cc;h=f2e774740d3af35b3cc6f92b1b6f68ddf15dbfa8;hb=91c057494be9f97020211ee1855c2d1d190df95c;hp=ef90c347550edd8980c30288eac27a773fc64a1f;hpb=49ab8ea4551ec82ae8b561cb256f762fd7f831f2;p=ardour.git diff --git a/gtk2_ardour/utils.cc b/gtk2_ardour/utils.cc index ef90c34755..f2e774740d 100644 --- a/gtk2_ardour/utils.cc +++ b/gtk2_ardour/utils.cc @@ -1,7 +1,7 @@ /* - Copyright (C) 2003 Paul Davis + Copyright (C) 2003 Paul Davis - This program is free software; you can redistribute it and/or modify + This program is free software; you an 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. @@ -15,53 +15,89 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id$ */ +#ifdef WAF_BUILD +#include "gtk2ardour-config.h" +#endif + +#include // for fontmap resolution control for GnomeCanvas +#include // for fontmap resolution control for GnomeCanvas + #include #include #include +#include #include #include +#include #include #include #include #include #include +#include "pbd/file_utils.h" + #include -#include +#include "ardour/configuration.h" +#include "ardour/rc_configuration.h" + +#include "ardour/filesystem_paths.h" #include "ardour_ui.h" +#include "debug.h" +#include "public_editor.h" #include "keyboard.h" #include "utils.h" #include "i18n.h" #include "rgb_macros.h" #include "canvas_impl.h" +#include "gui_thread.h" using namespace std; using namespace Gtk; -using namespace sigc; using namespace Glib; using namespace PBD; +using Gtkmm2ext::Keyboard; + +sigc::signal DPIReset; -ustring -fit_to_pixels (const ustring& str, int pixel_width, Pango::FontDescription& font, int& actual_width) +int +pixel_width (const string& str, Pango::FontDescription& font) { Label foo; Glib::RefPtr layout = foo.create_pango_layout (""); - + + layout->set_font_description (font); + layout->set_text (str); + + int width, height; + Gtkmm2ext::get_ink_pixel_size (layout, width, height); + return width; +} + +string +fit_to_pixels (const string& str, int pixel_width, Pango::FontDescription& font, int& actual_width, bool with_ellipses) +{ + Label foo; + Glib::RefPtr layout = foo.create_pango_layout (""); + string::size_type shorter_by = 0; + string txt; + layout->set_font_description (font); actual_width = 0; - ustring ustr = str; - ustring::iterator last = ustr.end(); + string ustr = str; + string::iterator last = ustr.end(); --last; /* now points at final entry */ + txt = ustr; + while (!ustr.empty()) { - layout->set_text (ustr); + layout->set_text (txt); int width, height; Gtkmm2ext::get_ink_pixel_size (layout, width, height); @@ -70,19 +106,77 @@ fit_to_pixels (const ustring& str, int pixel_width, Pango::FontDescription& font actual_width = width; break; } - - ustr.erase (last); - --last; + + ustr.erase (last--); + shorter_by++; + + if (with_ellipses && shorter_by > 3) { + txt = ustr; + txt += "..."; + } else { + txt = ustr; + } } - return ustr; + return txt; } +/** Try to fit a string into a given horizontal space by ellipsizing it. + * @param cr Cairo context in which the text will be plotted. + * @param name Text. + * @param avail Available horizontal space. + * @return (Text, possibly ellipsized) and (horizontal size of text) + */ + +std::pair +fit_to_pixels (cairo_t* cr, std::string name, double avail) +{ + /* XXX hopefully there exists a more efficient way of doing this */ + + bool abbreviated = false; + uint32_t width = 0; + + while (1) { + cairo_text_extents_t ext; + cairo_text_extents (cr, name.c_str(), &ext); + + if (ext.width < avail || name.length() <= 4) { + width = ext.width; + break; + } + + if (abbreviated) { + name = name.substr (0, name.length() - 4) + "..."; + } else { + name = name.substr (0, name.length() - 3) + "..."; + abbreviated = true; + } + } + + return std::make_pair (name, width); +} + + +/** Add an element to a menu, settings its sensitivity. + * @param m Menu to add to. + * @param e Element to add. + * @param s true to make sensitive, false to make insensitive + */ +void +add_item_with_sensitivity (Menu_Helpers::MenuList& m, Menu_Helpers::MenuElem e, bool s) +{ + m.push_back (e); + if (!s) { + m.back().set_sensitive (false); + } +} + + gint -just_hide_it (GdkEventAny *ev, Gtk::Window *win) +just_hide_it (GdkEventAny */*ev*/, Gtk::Window *win) { - win->hide_all (); - return TRUE; + win->hide (); + return 0; } /* xpm2rgb copied from nixieclock, which bore the legend: @@ -100,23 +194,23 @@ xpm2rgb (const char** xpm, uint32_t& w, uint32_t& h) uint32_t t, x, y, colors, cpp; unsigned char c; unsigned char *savergb, *rgb; - + // PARSE HEADER - + if ( sscanf(xpm[0], "%u%u%u%u", &w, &h, &colors, &cpp) != 4 ) { error << string_compose (_("bad XPM header %1"), xpm[0]) << endmsg; return 0; } - savergb = rgb = (unsigned char*)art_alloc (h * w * 3); - + savergb = rgb = (unsigned char*) malloc (h * w * 3); + // LOAD XPM COLORMAP LONG ENOUGH TO DO CONVERSION for (t = 0; t < colors; ++t) { sscanf (xpm[t+1], "%c c #%lx", &c, &val); vals[c] = val; } - + // COLORMAP -> RGB CONVERSION // Get low 3 bytes from vals[] // @@ -152,8 +246,8 @@ xpm2rgba (const char** xpm, uint32_t& w, uint32_t& h) return 0; } - savergb = rgb = (unsigned char*)art_alloc (h * w * 4); - + savergb = rgb = (unsigned char*) malloc (h * w * 4); + // LOAD XPM COLORMAP LONG ENOUGH TO DO CONVERSION if (strstr (xpm[1], "None")) { @@ -168,7 +262,7 @@ xpm2rgba (const char** xpm, uint32_t& w, uint32_t& h) sscanf (xpm[t+1], "%c c #%lx", &c, &val); vals[c] = val; } - + // COLORMAP -> RGB CONVERSION // Get low 3 bytes from vals[] // @@ -199,7 +293,7 @@ xpm2rgba (const char** xpm, uint32_t& w, uint32_t& h) } ArdourCanvas::Points* -get_canvas_points (string who, uint32_t npoints) +get_canvas_points (string /*who*/, uint32_t npoints) { // cerr << who << ": wants " << npoints << " canvas points" << endl; #ifdef TRAP_EXCESSIVE_POINT_REQUESTS @@ -222,67 +316,23 @@ get_font_for_style (string widgetname) foobar.ensure_style(); style = foobar.get_style (); - return style->get_font(); -} - -gint -pane_handler (GdkEventButton* ev, Gtk::Paned* pane) -{ - if (ev->window != Gtkmm2ext::get_paned_handle (*pane)) { - return FALSE; - } - if (Keyboard::is_delete_event (ev)) { + Glib::RefPtr layout = foobar.get_layout(); - gint pos; - gint cmp; - - pos = pane->get_position (); - - if (dynamic_cast(pane)) { - cmp = pane->get_height(); - } else { - cmp = pane->get_width(); - } - - /* we have to use approximations here because we can't predict the - exact position or sizes of the pane (themes, etc) - */ + PangoFontDescription *pfd = (PangoFontDescription *)pango_layout_get_font_description((PangoLayout *)layout->gobj()); - if (pos < 10 || abs (pos - cmp) < 10) { + if (!pfd) { - /* already collapsed: restore it (note that this is cast from a pointer value to int, which is tricky on 64bit */ - - pane->set_position ((intptr_t) pane->get_data ("rpos")); + /* layout inherited its font description from a PangoContext */ - } else { - - int collapse_direction; - - /* store the current position */ - - pane->set_data ("rpos", (gpointer) pos); - - /* collapse to show the relevant child in full */ - - collapse_direction = (intptr_t) pane->get_data ("collapse-direction"); - - if (collapse_direction) { - pane->set_position (1); - } else { - if (dynamic_cast(pane)) { - pane->set_position (pane->get_height()); - } else { - pane->set_position (pane->get_width()); - } - } - } - - return TRUE; - } + PangoContext* ctxt = (PangoContext*) pango_layout_get_context ((PangoLayout*) layout->gobj()); + pfd = pango_context_get_font_description (ctxt); + return Pango::FontDescription (pfd); /* make a copy */ + } - return FALSE; + return Pango::FontDescription (pfd); /* make a copy */ } + uint32_t rgba_from_style (string style, uint32_t r, uint32_t g, uint32_t b, uint32_t a, string attr, int state, bool rgba) { @@ -297,43 +347,44 @@ rgba_from_style (string style, uint32_t r, uint32_t g, uint32_t b, uint32_t a, s } Gtk::Label foo; - + window->add (foo); foo.set_name (style); foo.ensure_style (); - - GtkRcStyle* waverc = foo.get_style()->gobj()->rc_style; - if (waverc) { + GtkRcStyle* rc = foo.get_style()->gobj()->rc_style; + + if (rc) { if (attr == "fg") { - r = waverc->fg[state].red / 257; - g = waverc->fg[state].green / 257; - b = waverc->fg[state].blue / 257; + r = rc->fg[state].red / 257; + g = rc->fg[state].green / 257; + b = rc->fg[state].blue / 257; + /* what a hack ... "a" is for "active" */ if (state == Gtk::STATE_NORMAL && rgba) { - a = waverc->fg[GTK_STATE_ACTIVE].red / 257; + a = rc->fg[GTK_STATE_ACTIVE].red / 257; } } else if (attr == "bg") { r = g = b = 0; - r = waverc->bg[state].red / 257; - g = waverc->bg[state].green / 257; - b = waverc->bg[state].blue / 257; + r = rc->bg[state].red / 257; + g = rc->bg[state].green / 257; + b = rc->bg[state].blue / 257; } else if (attr == "base") { - r = waverc->base[state].red / 257; - g = waverc->base[state].green / 257; - b = waverc->base[state].blue / 257; + r = rc->base[state].red / 257; + g = rc->base[state].green / 257; + b = rc->base[state].blue / 257; } else if (attr == "text") { - r = waverc->text[state].red / 257; - g = waverc->text[state].green / 257; - b = waverc->text[state].blue / 257; + r = rc->text[state].red / 257; + g = rc->text[state].green / 257; + b = rc->text[state].blue / 257; } } else { warning << string_compose (_("missing RGBA style for \"%1\""), style) << endl; } window->remove (); - + if (state == Gtk::STATE_NORMAL && rgba) { return (uint32_t) RGBA_TO_UINT(r,g,b,a); } else { @@ -341,7 +392,113 @@ rgba_from_style (string style, uint32_t r, uint32_t g, uint32_t b, uint32_t a, s } } -bool + +Gdk::Color +color_from_style (string widget_style_name, int state, string attr) +{ + GtkStyle* style; + + style = gtk_rc_get_style_by_paths (gtk_settings_get_default(), + widget_style_name.c_str(), + 0, G_TYPE_NONE); + + if (!style) { + error << string_compose (_("no style found for %1, using red"), style) << endmsg; + return Gdk::Color ("red"); + } + + if (attr == "fg") { + return Gdk::Color (&style->fg[state]); + } + + if (attr == "bg") { + return Gdk::Color (&style->bg[state]); + } + + if (attr == "light") { + return Gdk::Color (&style->light[state]); + } + + if (attr == "dark") { + return Gdk::Color (&style->dark[state]); + } + + if (attr == "mid") { + return Gdk::Color (&style->mid[state]); + } + + if (attr == "text") { + return Gdk::Color (&style->text[state]); + } + + if (attr == "base") { + return Gdk::Color (&style->base[state]); + } + + if (attr == "text_aa") { + return Gdk::Color (&style->text_aa[state]); + } + + error << string_compose (_("unknown style attribute %1 requested for color; using \"red\""), attr) << endmsg; + return Gdk::Color ("red"); +} + +Glib::RefPtr +gc_from_style (string widget_style_name, int state, string attr) +{ + GtkStyle* style; + + style = gtk_rc_get_style_by_paths (gtk_settings_get_default(), + widget_style_name.c_str(), + 0, G_TYPE_NONE); + + if (!style) { + error << string_compose (_("no style found for %1, using red"), style) << endmsg; + Glib::RefPtr ret = Gdk::GC::create(); + ret->set_rgb_fg_color(Gdk::Color("red")); + return ret; + } + + if (attr == "fg") { + return Glib::wrap(style->fg_gc[state]); + } + + if (attr == "bg") { + return Glib::wrap(style->bg_gc[state]); + } + + if (attr == "light") { + return Glib::wrap(style->light_gc[state]); + } + + if (attr == "dark") { + return Glib::wrap(style->dark_gc[state]); + } + + if (attr == "mid") { + return Glib::wrap(style->mid_gc[state]); + } + + if (attr == "text") { + return Glib::wrap(style->text_gc[state]); + } + + if (attr == "base") { + return Glib::wrap(style->base_gc[state]); + } + + if (attr == "text_aa") { + return Glib::wrap(style->text_aa_gc[state]); + } + + error << string_compose (_("unknown style attribute %1 requested for color; using \"red\""), attr) << endmsg; + Glib::RefPtr ret = Gdk::GC::create(); + ret->set_rgb_fg_color(Gdk::Color("red")); + return ret; +} + + +bool canvas_item_visible (ArdourCanvas::Item* item) { return (item->gobj()->object.flags & GNOME_CANVAS_ITEM_VISIBLE) ? true : false; @@ -353,18 +510,54 @@ set_color (Gdk::Color& c, int rgb) c.set_rgb((rgb >> 16)*256, ((rgb & 0xff00) >> 8)*256, (rgb & 0xff)*256); } +bool +relay_key_press (GdkEventKey* ev, Gtk::Window* win) +{ + if (!key_press_focus_accelerator_handler (*win, ev)) { + return PublicEditor::instance().on_key_press_event(ev); + } else { + return true; + } +} + +bool +forward_key_press (GdkEventKey* ev) +{ + return PublicEditor::instance().on_key_press_event(ev); +} + bool key_press_focus_accelerator_handler (Gtk::Window& window, GdkEventKey* ev) { GtkWindow* win = window.gobj(); GtkWidget* focus = gtk_window_get_focus (win); bool special_handling_of_unmodified_accelerators = false; + bool allow_activating = true; + /* consider all relevant modifiers but not LOCK or SHIFT */ + const guint mask = (Keyboard::RelevantModifierKeyMask & ~(Gdk::SHIFT_MASK|Gdk::LOCK_MASK)); if (focus) { - if (GTK_IS_ENTRY(focus)) { + if (GTK_IS_ENTRY(focus) || Keyboard::some_magic_widget_has_focus()) { special_handling_of_unmodified_accelerators = true; } - } + } + +#ifdef GTKOSX + /* should this be universally true? */ + if (Keyboard::some_magic_widget_has_focus ()) { + allow_activating = false; + } +#endif + + + DEBUG_TRACE (DEBUG::Accelerators, string_compose ("Win = %1 focus = %7 Key event: code = %2 state = %3 special handling ? %4 magic widget focus ? %5 allow_activation ? %6\n", + win, + ev->keyval, + ev->state, + special_handling_of_unmodified_accelerators, + Keyboard::some_magic_widget_has_focus(), + allow_activating, + focus)); /* This exists to allow us to override the way GTK handles key events. The normal sequence is: @@ -375,18 +568,18 @@ key_press_focus_accelerator_handler (Gtk::Window& window, GdkEventKey* ev) the focus widget and/or focus chain The problem with this is that if the accelerators include - keys without modifiers, such as the space bar or the + keys without modifiers, such as the space bar or the letter "e", then pressing the key while typing into a text entry widget results in the accelerator being activated, instead of the desired letter appearing in the text entry. There is no good way of fixing this, but this - represents a compromise. The idea is that + represents a compromise. The idea is that key events involving modifiers (not Shift) get routed into the activation pathway first, then get propagated to the focus widget if necessary. - + If the key event doesn't involve modifiers, we deliver to the focus widget first, thus allowing it to get "normal text" without interference @@ -397,75 +590,309 @@ key_press_focus_accelerator_handler (Gtk::Window& window, GdkEventKey* ev) all "normal text" accelerators. */ - if (!special_handling_of_unmodified_accelerators) { + /* XXX note that for a brief moment, the conditional above + * included "|| (ev->state & mask)" so as to enforce the + * implication of special_handling_of_UNMODIFIED_accelerators. + * however, this forces any key that GTK doesn't allow and that + * we have an alternative (see next comment) for to be + * automatically sent through the accel groups activation + * pathway, which prevents individual widgets & canvas items + * from ever seeing it if is used by a key binding. + * + * specifically, this hid Ctrl-down-arrow from MIDI region + * views because it is also bound to an action. + * + * until we have a robust, clean binding system, this + * quirk will have to remain in place. + */ + /* pretend that certain key events that GTK does not allow to be used as accelerators are actually something that - it does allow. + it does allow. but only where there are no modifiers. */ - int ret = false; + uint32_t fakekey = ev->keyval; - switch (ev->keyval) { - case GDK_Up: - ret = gtk_accel_groups_activate(G_OBJECT(win), GDK_uparrow, GdkModifierType(ev->state)); - break; - - case GDK_Down: - ret = gtk_accel_groups_activate(G_OBJECT(win), GDK_downarrow, GdkModifierType(ev->state)); - break; + if (Gtkmm2ext::possibly_translate_keyval_to_make_legal_accelerator (fakekey)) { + if (allow_activating && gtk_accel_groups_activate(G_OBJECT(win), fakekey, GdkModifierType(ev->state))) { + DEBUG_TRACE (DEBUG::Accelerators, "\taccel group activated by fakekey\n"); + return true; + } + } + } - case GDK_Right: - ret = gtk_accel_groups_activate(G_OBJECT(win), GDK_rightarrow, GdkModifierType(ev->state)); - break; + if (!special_handling_of_unmodified_accelerators || (ev->state & mask)) { - case GDK_Left: - ret = gtk_accel_groups_activate(G_OBJECT(win), GDK_leftarrow, GdkModifierType(ev->state)); - break; + /* no special handling or there are modifiers in effect: accelerate first */ - default: - break; - } + DEBUG_TRACE (DEBUG::Accelerators, "\tactivate, then propagate\n"); - if (ret) { - return true; + if (allow_activating) { + if (gtk_window_activate_key (win, ev)) { + return true; + } + } else { + DEBUG_TRACE (DEBUG::Accelerators, "\tactivation skipped\n"); } - } - - if (!special_handling_of_unmodified_accelerators || - ev->state & (Gdk::MOD1_MASK| - Gdk::MOD3_MASK| - Gdk::MOD4_MASK| - Gdk::MOD5_MASK| - Gdk::CONTROL_MASK)) { - /* no special handling or modifiers in effect: accelerate first */ + DEBUG_TRACE (DEBUG::Accelerators, "\tnot accelerated, now propagate\n"); - if (!gtk_window_activate_key (win, ev)) { - return gtk_window_propagate_key_event (win, ev); - } else { - return true; - } + return gtk_window_propagate_key_event (win, ev); } - + /* no modifiers, propagate first */ - + + DEBUG_TRACE (DEBUG::Accelerators, "\tpropagate, then activate\n"); + if (!gtk_window_propagate_key_event (win, ev)) { - return gtk_window_activate_key (win, ev); - } + DEBUG_TRACE (DEBUG::Accelerators, "\tpropagation didn't handle, so activate\n"); + if (allow_activating) { + return gtk_window_activate_key (win, ev); + } else { + DEBUG_TRACE (DEBUG::Accelerators, "\tactivation skipped\n"); + } + } else { + DEBUG_TRACE (DEBUG::Accelerators, "\thandled by propagate\n"); + return true; + } + DEBUG_TRACE (DEBUG::Accelerators, "\tnot handled\n"); return true; } -Glib::RefPtr +Glib::RefPtr get_xpm (std::string name) { if (!xpm_map[name]) { - xpm_map[name] = Gdk::Pixbuf::create_from_file (ARDOUR::find_data_file(name, "pixmaps")); + + SearchPath spath(ARDOUR::ardour_search_path()); + spath += ARDOUR::system_data_search_path(); + + spath.add_subdirectory_to_paths("pixmaps"); + + sys::path data_file_path; + + if(!find_file_in_search_path (spath, name, data_file_path)) { + fatal << string_compose (_("cannot find XPM file for %1"), name) << endmsg; + } + + try { + xpm_map[name] = Gdk::Pixbuf::create_from_file (data_file_path.to_string()); + } catch(const Glib::Error& e) { + warning << "Caught Glib::Error: " << e.what() << endmsg; + } + } + + return xpm_map[name]; +} + +std::string +get_icon_path (const char* cname) +{ + string name = cname; + name += X_(".png"); + + SearchPath spath(ARDOUR::ardour_search_path()); + spath += ARDOUR::system_data_search_path(); + + spath.add_subdirectory_to_paths("icons"); + + sys::path data_file_path; + + if (!find_file_in_search_path (spath, name, data_file_path)) { + fatal << string_compose (_("cannot find icon image for %1"), name) << endmsg; + } + + return data_file_path.to_string(); +} + +Glib::RefPtr +get_icon (const char* cname) +{ + Glib::RefPtr img; + try { + img = Gdk::Pixbuf::create_from_file (get_icon_path (cname)); + } catch (const Gdk::PixbufError &e) { + cerr << "Caught PixbufError: " << e.what() << endl; + } catch (...) { + g_message("Caught ... "); + } + + return img; +} + +string +longest (vector& strings) +{ + if (strings.empty()) { + return string (""); + } + + vector::iterator longest = strings.begin(); + string::size_type longest_length = (*longest).length(); + + vector::iterator i = longest; + ++i; + + while (i != strings.end()) { + + string::size_type len = (*i).length(); + + if (len > longest_length) { + longest = i; + longest_length = len; + } + + ++i; + } + + return *longest; +} + +bool +key_is_legal_for_numeric_entry (guint keyval) +{ + switch (keyval) { + case GDK_minus: + case GDK_plus: + case GDK_period: + case GDK_comma: + case GDK_0: + case GDK_1: + case GDK_2: + case GDK_3: + case GDK_4: + case GDK_5: + case GDK_6: + case GDK_7: + case GDK_8: + case GDK_9: + case GDK_KP_Add: + case GDK_KP_Subtract: + case GDK_KP_Decimal: + case GDK_KP_0: + case GDK_KP_1: + case GDK_KP_2: + case GDK_KP_3: + case GDK_KP_4: + case GDK_KP_5: + case GDK_KP_6: + case GDK_KP_7: + case GDK_KP_8: + case GDK_KP_9: + case GDK_Return: + case GDK_BackSpace: + case GDK_Delete: + case GDK_KP_Enter: + case GDK_Home: + case GDK_End: + case GDK_Left: + case GDK_Right: + return true; + + default: + break; + } + + return false; +} +void +set_pango_fontsize () +{ + long val = ARDOUR::Config->get_font_scale(); + + /* FT2 rendering - used by GnomeCanvas, sigh */ + + pango_ft2_font_map_set_resolution ((PangoFT2FontMap*) pango_ft2_font_map_for_display(), val/1024, val/1024); + + /* Cairo rendering, in case there is any */ + + pango_cairo_font_map_set_resolution ((PangoCairoFontMap*) pango_cairo_font_map_get_default(), val/1024); +} + +void +reset_dpi () +{ + long val = ARDOUR::Config->get_font_scale(); + set_pango_fontsize (); + /* Xft rendering */ + + gtk_settings_set_long_property (gtk_settings_get_default(), + "gtk-xft-dpi", val, "ardour"); + DPIReset();//Emit Signal +} + +void +resize_window_to_proportion_of_monitor (Gtk::Window* window, int max_width, int max_height) +{ + Glib::RefPtr screen = window->get_screen (); + Gdk::Rectangle monitor_rect; + screen->get_monitor_geometry (0, monitor_rect); + + int const w = std::min (int (monitor_rect.get_width() * 0.8), max_width); + int const h = std::min (int (monitor_rect.get_height() * 0.8), max_height); + + window->resize (w, h); +} + + +/** Replace _ with __ in a string; for use with menu item text to make underscores displayed correctly */ +string +escape_underscores (string const & s) +{ + string o; + string::size_type const N = s.length (); + + for (string::size_type i = 0; i < N; ++i) { + if (s[i] == '_') { + o += "__"; + } else { + o += s[i]; + } } - - return (xpm_map[name]); + + return o; } +Gdk::Color +unique_random_color (list& used_colors) +{ + Gdk::Color newcolor; + + while (1) { + + /* avoid neon/glowing tones by limiting them to the + "inner section" (paler) of a color wheel/circle. + */ + + const int32_t max_saturation = 48000; // 65535 would open up the whole color wheel + + newcolor.set_red (random() % max_saturation); + newcolor.set_blue (random() % max_saturation); + newcolor.set_green (random() % max_saturation); + + if (used_colors.size() == 0) { + used_colors.push_back (newcolor); + return newcolor; + } + + for (list::iterator i = used_colors.begin(); i != used_colors.end(); ++i) { + Gdk::Color c = *i; + float rdelta, bdelta, gdelta; + + rdelta = newcolor.get_red() - c.get_red(); + bdelta = newcolor.get_blue() - c.get_blue(); + gdelta = newcolor.get_green() - c.get_green(); + + if (sqrt (rdelta*rdelta + bdelta*bdelta + gdelta*gdelta) > 25.0) { + used_colors.push_back (newcolor); + return newcolor; + } + } + + /* XXX need throttle here to make sure we don't spin for ever */ + } +}