src/gui.cpp

   1 /* Calf DSP Library
   2  * GUI functions for a plugin.
   3  * Copyright (C) 2007-2011 Krzysztof Foltman
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General
  16  * Public License along with this program; if not, write to the
  17  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18  * Boston, MA  02110-1301  USA
  19  */
  20
  21 #include <calf/gui_config.h>
  22 #include <calf/gui_controls.h>
  23 #include <calf/preset.h>
  24 #include <calf/preset_gui.h>
  25 #include <gdk/gdk.h>
  26
  27 #include <iostream>
  28
  29 using namespace calf_plugins;
  30 using namespace std;
  31
  32 /******************************** GUI proper ********************************/
  33
  34 plugin_gui::plugin_gui(plugin_gui_window *_window)
  35 : last_status_serial_no(0)
  36 , window(_window)
  37 {
  38     ignore_stack = 0;
  39     top_container = NULL;
  40     current_control = NULL;
  41     param_count = 0;
  42     container = NULL;
  43     effect_name = NULL;
  44     preset_access = new gui_preset_access(this);
  45 }
  46
  47 param_control *plugin_gui::create_control_from_xml(const char *element, const char *attributes[])
  48 {
  49     if (!strcmp(element, "knob"))
  50         return new knob_param_control;
  51     if (!strcmp(element, "hscale"))
  52         return new hscale_param_control;
  53     if (!strcmp(element, "vscale"))
  54         return new vscale_param_control;
  55     if (!strcmp(element, "combo"))
  56         return new combo_box_param_control;
  57     if (!strcmp(element, "check"))
  58         return new check_param_control;
  59     if (!strcmp(element, "radio"))
  60         return new radio_param_control;
  61     if (!strcmp(element, "toggle"))
  62         return new toggle_param_control;
  63     if (!strcmp(element, "tap"))
  64         return new tap_button_param_control;
  65     if (!strcmp(element, "spin"))
  66         return new spin_param_control;
  67     if (!strcmp(element, "button"))
  68         return new button_param_control;
  69     if (!strcmp(element, "label"))
  70         return new label_param_control;
  71     if (!strcmp(element, "value"))
  72         return new value_param_control;
  73     if (!strcmp(element, "vumeter"))
  74         return new vumeter_param_control;
  75     if (!strcmp(element, "line-graph"))
  76         return new line_graph_param_control;
  77     if (!strcmp(element, "phase-graph"))
  78         return new phase_graph_param_control;
  79     if (!strcmp(element, "keyboard"))
  80         return new keyboard_param_control;
  81     if (!strcmp(element, "curve"))
  82         return new curve_param_control;
  83     if (!strcmp(element, "led"))
  84         return new led_param_control;
  85     if (!strcmp(element, "tube"))
  86         return new tube_param_control;
  87     if (!strcmp(element, "entry"))
  88         return new entry_param_control;
  89     if (!strcmp(element, "filechooser"))
  90         return new filechooser_param_control;
  91     if (!strcmp(element, "listview"))
  92         return new listview_param_control;
  93     if (!strcmp(element, "notebook"))
  94         return new notebook_param_control;
  95     return NULL;
  96 }
  97
  98 control_container *plugin_gui::create_container_from_xml(const char *element, const char *attributes[])
  99 {
 100     if (!strcmp(element, "table"))
 101         return new table_container;
 102     if (!strcmp(element, "vbox"))
 103         return new vbox_container;
 104     if (!strcmp(element, "hbox"))
 105         return new hbox_container;
 106     if (!strcmp(element, "align"))
 107         return new alignment_container;
 108     if (!strcmp(element, "frame"))
 109         return new frame_container;
 110     if (!strcmp(element, "scrolled"))
 111         return new scrolled_container;
 112     return NULL;
 113 }
 114
 115 void plugin_gui::xml_element_start(void *data, const char *element, const char *attributes[])
 116 {
 117     plugin_gui *gui = (plugin_gui *)data;
 118     gui->xml_element_start(element, attributes);
 119 }
 120
 121 int plugin_gui::get_param_no_by_name(string param_name)
 122 {
 123     int param_no = -1;
 124     map<string, int>::iterator it = param_name_map.find(param_name);
 125     if (it == param_name_map.end())
 126         g_error("Unknown parameter %s", param_name.c_str());
 127     else
 128         param_no = it->second;
 129
 130     return param_no;
 131 }
 132
 133 void plugin_gui::xml_element_start(const char *element, const char *attributes[])
 134 {
 135     if (ignore_stack) {
 136         ignore_stack++;
 137         return;
 138     }
 139     control_base::xml_attribute_map xam;
 140     while(*attributes)
 141     {
 142         xam[attributes[0]] = attributes[1];
 143         attributes += 2;
 144     }
 145
 146     if (!strcmp(element, "if"))
 147     {
 148         if (!xam.count("cond") || xam["cond"].empty())
 149         {
 150             g_error("Incorrect <if cond=\"[!]symbol\"> element");
 151         }
 152         string cond = xam["cond"];
 153         bool state = true;
 154         if (cond.substr(0, 1) == "!") {
 155             state = false;
 156             cond.erase(0, 1);
 157         }
 158         if (window->environment->check_condition(cond.c_str()) == state)
 159             return;
 160         ignore_stack = 1;
 161         return;
 162     }
 163     control_container *cc = create_container_from_xml(element, attributes);
 164     if (cc != NULL)
 165     {
 166         cc->attribs = xam;
 167         cc->create(this, element, xam);
 168         cc->set_std_properties();
 169         gtk_container_set_border_width(cc->container, cc->get_int("border"));
 170
 171         container_stack.push_back(cc);
 172         current_control = NULL;
 173         return;
 174     }
 175     if (!container_stack.empty())
 176     {
 177         current_control = create_control_from_xml(element, attributes);
 178         if (current_control)
 179         {
 180             current_control->control_name = element;
 181             current_control->attribs = xam;
 182             int param_no = -1;
 183             if (xam.count("param"))
 184             {
 185                 param_no = get_param_no_by_name(xam["param"]);
 186             }
 187             if (param_no != -1)
 188                 current_control->param_variable = plugin->get_metadata_iface()->get_param_props(param_no)->short_name;
 189             current_control->create(this, param_no);
 190             current_control->set_std_properties();
 191             current_control->init_xml(element);
 192             current_control->add_context_menu_handler();
 193             if (current_control->is_container()) {
 194                 gtk_container_set_border_width(current_control->container, current_control->get_int("border"));
 195                 container_stack.push_back(current_control);
 196                 control_stack.push_back(current_control);
 197             }
 198             return;
 199         }
 200     }
 201     g_error("Unxpected element %s in GUI definition\n", element);
 202 }
 203
 204 void plugin_gui::xml_element_end(void *data, const char *element)
 205 {
 206     plugin_gui *gui = (plugin_gui *)data;
 207     unsigned int ss = gui->container_stack.size();
 208     if (gui->ignore_stack) {
 209         gui->ignore_stack--;
 210         return;
 211     }
 212     if (!strcmp(element, "if"))
 213     {
 214         return;
 215     }
 216     if (gui->current_control and !gui->current_control->is_container())
 217     {
 218         (*gui->container_stack.rbegin())->add(gui->current_control->widget, gui->current_control);
 219         gui->current_control->hook_params();
 220         gui->current_control->set();
 221         gui->current_control->created();
 222         gtk_widget_show_all(gui->current_control->widget);
 223         gui->current_control = NULL;
 224         return;
 225     }
 226     if (ss > 1) {
 227         gui->container_stack[ss - 2]->add(GTK_WIDGET(gui->container_stack[ss - 1]->container), gui->container_stack[ss - 1]);
 228         gtk_widget_show_all(GTK_WIDGET(gui->container_stack[ss - 1]->container));
 229     }
 230     else {
 231         gui->top_container = gui->container_stack[0];
 232         gtk_widget_show_all(GTK_WIDGET(gui->container_stack[0]->container));
 233     }
 234     int css = gui->control_stack.size();
 235     if (ss > 1 and gui->container_stack[ss - 1]->is_container() and css) {
 236         gui->control_stack[css - 1]->hook_params();
 237         gui->control_stack[css - 1]->set();
 238         gui->control_stack[css - 1]->created();
 239
 240         gui->control_stack.pop_back();
 241     }
 242     gui->container_stack.pop_back();
 243     gui->current_control = NULL;
 244 }
 245
 246
 247 GtkWidget *plugin_gui::create_from_xml(plugin_ctl_iface *_plugin, const char *xml)
 248 {
 249     current_control = NULL;
 250     top_container = NULL;
 251     parser = XML_ParserCreate("UTF-8");
 252     plugin = _plugin;
 253     container_stack.clear();
 254     control_stack.clear();
 255     ignore_stack = 0;
 256
 257     param_name_map.clear();
 258     read_serials.clear();
 259     int size = plugin->get_metadata_iface()->get_param_count();
 260     read_serials.resize(size);
 261     for (int i = 0; i < size; i++)
 262         param_name_map[plugin->get_metadata_iface()->get_param_props(i)->short_name] = i;
 263
 264     XML_SetUserData(parser, this);
 265     XML_SetElementHandler(parser, xml_element_start, xml_element_end);
 266     XML_Status status = XML_Parse(parser, xml, strlen(xml), 1);
 267     if (status == XML_STATUS_ERROR)
 268     {
 269         g_error("Parse error: %s in XML", XML_ErrorString(XML_GetErrorCode(parser)));
 270     }
 271
 272     XML_ParserFree(parser);
 273     last_status_serial_no = plugin->send_status_updates(this, 0);
 274     GtkWidget *eventbox  = gtk_event_box_new();
 275     GtkWidget *decoTable = gtk_table_new(3, 1, FALSE);
 276
 277     // decorations
 278     // overall background
 279     //GtkWidget *bgImg     = gtk_image_new_from_file(PKGLIBDIR "/background.png");
 280     //gtk_widget_set_size_request(GTK_WIDGET(bgImg), 1, 1);
 281
 282     // images for left side
 283     GtkWidget *nwImg     = gtk_image_new_from_file(PKGLIBDIR "/side_nw.png");
 284     GtkWidget *swImg     = gtk_image_new_from_file(PKGLIBDIR "/side_sw.png");
 285     GtkWidget *wImg      = gtk_image_new_from_file(PKGLIBDIR "/side_w.png");
 286     gtk_widget_set_size_request(GTK_WIDGET(wImg), 56, 1);
 287
 288     // images for right side
 289     GtkWidget *neImg     = gtk_image_new_from_file(PKGLIBDIR "/side_ne.png");
 290     GtkWidget *seImg     = gtk_image_new_from_file(PKGLIBDIR "/side_se.png");
 291     GtkWidget *eImg      = gtk_image_new_from_file(PKGLIBDIR "/side_e.png");
 292     GtkWidget *logoImg   = gtk_image_new_from_file(PKGLIBDIR "/side_e_logo.png");
 293     gtk_widget_set_size_request(GTK_WIDGET(eImg), 56, 1);
 294
 295     // pack left box
 296     leftBox = gtk_vbox_new(FALSE, 0);
 297     gtk_box_pack_start(GTK_BOX(leftBox), GTK_WIDGET(nwImg), FALSE, FALSE, 0);
 298     gtk_box_pack_start(GTK_BOX(leftBox), GTK_WIDGET(wImg), TRUE, TRUE, 0);
 299     gtk_box_pack_end(GTK_BOX(leftBox), GTK_WIDGET(swImg), FALSE, FALSE, 0);
 300
 301      // pack right box
 302     rightBox = gtk_vbox_new(FALSE, 0);
 303     gtk_box_pack_start(GTK_BOX(rightBox), GTK_WIDGET(neImg), FALSE, FALSE, 0);
 304     gtk_box_pack_start(GTK_BOX(rightBox), GTK_WIDGET(eImg), TRUE, TRUE, 0);
 305     gtk_box_pack_start(GTK_BOX(rightBox), GTK_WIDGET(logoImg), FALSE, FALSE, 0);
 306     gtk_box_pack_end(GTK_BOX(rightBox), GTK_WIDGET(seImg), FALSE, FALSE, 0);
 307
 308     //gtk_table_attach(GTK_TABLE(decoTable), GTK_WIDGET(bgImg),     0, 2, 0, 2, (GtkAttachOptions)(GTK_EXPAND | GTK_SHRINK | GTK_FILL), (GtkAttachOptions)(GTK_EXPAND | GTK_SHRINK | GTK_FILL), 0, 0);
 309     gtk_table_attach(GTK_TABLE(decoTable), GTK_WIDGET(leftBox),   0, 1, 0, 1, (GtkAttachOptions)(0), (GtkAttachOptions)(GTK_EXPAND | GTK_FILL), 0, 0);
 310     gtk_table_attach(GTK_TABLE(decoTable), GTK_WIDGET(rightBox),  2, 3, 0, 1, (GtkAttachOptions)(0), (GtkAttachOptions)(GTK_EXPAND | GTK_FILL), 0, 0);
 311
 312     gtk_table_attach(GTK_TABLE(decoTable), GTK_WIDGET(top_container->container), 1, 2, 0, 1, (GtkAttachOptions)(GTK_EXPAND | GTK_FILL), (GtkAttachOptions)(GTK_EXPAND | GTK_FILL), 15, 5);
 313     gtk_container_add( GTK_CONTAINER(eventbox), decoTable );
 314     gtk_widget_set_name( GTK_WIDGET(eventbox), "Calf-Plugin" );
 315
 316     // create window with viewport
 317 //    GtkWidget *sw = gtk_scrolled_window_new(NULL, NULL);
 318 //    gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(sw), GTK_POLICY_NEVER, GTK_POLICY_NEVER);
 319 //    gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(sw), GTK_SHADOW_NONE);
 320 //    gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(sw), GTK_WIDGET(decoTable));
 321
 322     return GTK_WIDGET(eventbox);
 323 }
 324
 325 void plugin_gui::send_configure(const char *key, const char *value)
 326 {
 327     // XXXKF this should really be replaced by a separate list of SCI-capable param controls
 328     for (unsigned int i = 0; i < params.size(); i++)
 329     {
 330         assert(params[i] != NULL);
 331         send_configure_iface *sci = dynamic_cast<send_configure_iface *>(params[i]);
 332         if (sci)
 333             sci->send_configure(key, value);
 334     }
 335 }
 336
 337 void plugin_gui::send_status(const char *key, const char *value)
 338 {
 339     // XXXKF this should really be replaced by a separate list of SUI-capable param controls
 340     for (unsigned int i = 0; i < params.size(); i++)
 341     {
 342         assert(params[i] != NULL);
 343         send_updates_iface *sui = dynamic_cast<send_updates_iface *>(params[i]);
 344         if (sui)
 345             sui->send_status(key, value);
 346     }
 347 }
 348
 349 void plugin_gui::on_idle()
 350 {
 351     set<unsigned> changed;
 352     for (unsigned i = 0; i < read_serials.size(); i++)
 353     {
 354         int write_serial = plugin->get_write_serial(i);
 355         if (write_serial - read_serials[i] > 0)
 356         {
 357             read_serials[i] = write_serial;
 358             changed.insert(i);
 359         }
 360     }
 361     for (unsigned i = 0; i < params.size(); i++)
 362     {
 363         int param_no = params[i]->param_no;
 364         if (param_no != -1)
 365         {
 366             const parameter_properties &props = *plugin->get_metadata_iface()->get_param_props(param_no);
 367             bool is_output = (props.flags & PF_PROP_OUTPUT) != 0;
 368             if (is_output || (param_no != -1 && changed.count(param_no)))
 369                 params[i]->set();
 370         }
 371         params[i]->on_idle();
 372     }
 373     last_status_serial_no = plugin->send_status_updates(this, last_status_serial_no);
 374     // XXXKF iterate over par2ctl, too...
 375 }
 376
 377 void plugin_gui::refresh()
 378 {
 379     for (unsigned int i = 0; i < params.size(); i++)
 380         params[i]->set();
 381     plugin->send_configures(this);
 382     last_status_serial_no = plugin->send_status_updates(this, last_status_serial_no);
 383 }
 384
 385 void plugin_gui::refresh(int param_no, param_control *originator)
 386 {
 387     std::multimap<int, param_control *>::iterator it = par2ctl.find(param_no);
 388     while(it != par2ctl.end() && it->first == param_no)
 389     {
 390         if (it->second != originator)
 391             it->second->set();
 392         it++;
 393     }
 394 }
 395
 396 void plugin_gui::set_param_value(int param_no, float value, param_control *originator)
 397 {
 398     plugin->set_param_value(param_no, value);
 399     refresh(param_no);
 400 }
 401
 402 /// Get a radio button group (if it exists) for a parameter
 403 GSList *plugin_gui::get_radio_group(int param)
 404 {
 405     map<int, GSList *>::const_iterator i = param_radio_groups.find(param);
 406     if (i == param_radio_groups.end())
 407         return NULL;
 408     else
 409         return i->second;
 410 }
 411
 412 /// Set a radio button group for a parameter
 413 void plugin_gui::set_radio_group(int param, GSList *group)
 414 {
 415     param_radio_groups[param] = group;
 416 }
 417
 418 void plugin_gui::show_rack_ears(bool show)
 419 {
 420     // if hidden, add a no-show-all attribute so that LV2 host doesn't accidentally override
 421     // the setting by doing a show_all on the outermost container
 422     gtk_widget_set_no_show_all(leftBox, !show);
 423     gtk_widget_set_no_show_all(rightBox, !show);
 424     if (show)
 425     {
 426         gtk_widget_show(leftBox);
 427         gtk_widget_show(rightBox);
 428     }
 429     else
 430     {
 431         gtk_widget_hide(leftBox);
 432         gtk_widget_hide(rightBox);
 433     }
 434 }
 435
 436 void plugin_gui::on_automation_add(GtkWidget *widget, void *user_data)
 437 {
 438     plugin_gui *self = (plugin_gui *)user_data;
 439     self->plugin->add_automation(self->context_menu_last_designator, automation_range(0, 1, self->context_menu_param_no));
 440 }
 441
 442 void plugin_gui::on_automation_delete(GtkWidget *widget, void *user_data)
 443 {
 444     automation_menu_entry *ame = (automation_menu_entry *)user_data;
 445     ame->gui->plugin->delete_automation(ame->source, ame->gui->context_menu_param_no);
 446 }
 447
 448 void plugin_gui::on_automation_set_lower_or_upper(automation_menu_entry *ame, bool is_upper)
 449 {
 450     const parameter_properties *props = plugin->get_metadata_iface()->get_param_props(context_menu_param_no);
 451     float mapped = props->to_01(plugin->get_param_value(context_menu_param_no));
 452
 453     automation_map mappings;
 454     plugin->get_automation(context_menu_param_no, mappings);
 455     automation_map::const_iterator i = mappings.find(ame->source);
 456     if (i != mappings.end())
 457     {
 458         if (is_upper)
 459             plugin->add_automation(context_menu_last_designator, automation_range(i->second.min_value, mapped, context_menu_param_no));
 460         else
 461             plugin->add_automation(context_menu_last_designator, automation_range(mapped, i->second.max_value, context_menu_param_no));
 462     }
 463 }
 464
 465 void plugin_gui::on_automation_set_lower(GtkWidget *widget, void *user_data)
 466 {
 467     automation_menu_entry *ame = (automation_menu_entry *)user_data;
 468     ame->gui->on_automation_set_lower_or_upper(ame, false);
 469 }
 470
 471 void plugin_gui::on_automation_set_upper(GtkWidget *widget, void *user_data)
 472 {
 473     automation_menu_entry *ame = (automation_menu_entry *)user_data;
 474     ame->gui->on_automation_set_lower_or_upper(ame, true);
 475 }
 476
 477 void plugin_gui::cleanup_automation_entries()
 478 {
 479     for (int i = 0; i < (int)automation_menu_callback_data.size(); i++)
 480         delete automation_menu_callback_data[i];
 481     automation_menu_callback_data.clear();
 482 }
 483
 484 void plugin_gui::on_control_popup(param_control *ctl, int param_no)
 485 {
 486     cleanup_automation_entries();
 487     if (param_no == -1)
 488         return;
 489     context_menu_param_no = param_no;
 490     GtkWidget *menu = gtk_menu_new();
 491
 492     multimap<uint32_t, automation_range> mappings;
 493     plugin->get_automation(param_no, mappings);
 494
 495     context_menu_last_designator = plugin->get_last_automation_source();
 496
 497     GtkWidget *item;
 498     if (context_menu_last_designator != 0xFFFFFFFF)
 499     {
 500         stringstream ss;
 501         ss << "_Bind to: Ch" << (1 + (context_menu_last_designator >> 8)) << ", CC#" << (context_menu_last_designator & 127);
 502         item = gtk_menu_item_new_with_mnemonic(ss.str().c_str());
 503         g_signal_connect(item, "activate", (GCallback)on_automation_add, this);
 504         gtk_menu_shell_append(GTK_MENU_SHELL(menu), item);
 505     }
 506     else
 507     {
 508         item = gtk_menu_item_new_with_label("Send CC to automate");
 509         gtk_widget_set_sensitive(item, FALSE);
 510         gtk_menu_shell_append(GTK_MENU_SHELL(menu), item);
 511     }
 512
 513     for(multimap<uint32_t, automation_range>::const_iterator i = mappings.begin(); i != mappings.end(); i++)
 514     {
 515         automation_menu_entry *ame = new automation_menu_entry(this, i->first);
 516         automation_menu_callback_data.push_back(ame);
 517         stringstream ss;
 518         ss << "Mapping: Ch" << (1 + (i->first >> 8)) << ", CC#" << (i->first & 127);
 519         item = gtk_menu_item_new_with_label(ss.str().c_str());
 520         gtk_menu_shell_append(GTK_MENU_SHELL(menu), item);
 521
 522         GtkWidget *submenu = gtk_menu_new();
 523         gtk_menu_item_set_submenu(GTK_MENU_ITEM(item), submenu);
 524
 525         item = gtk_menu_item_new_with_mnemonic("_Delete");
 526         g_signal_connect(item, "activate", (GCallback)on_automation_delete, ame);
 527         gtk_menu_shell_append(GTK_MENU_SHELL(submenu), item);
 528
 529         item = gtk_menu_item_new_with_mnemonic("Set _lower limit");
 530         g_signal_connect(item, "activate", (GCallback)on_automation_set_lower, ame);
 531         gtk_menu_shell_append(GTK_MENU_SHELL(submenu), item);
 532
 533         item = gtk_menu_item_new_with_mnemonic("Set _upper limit");
 534         g_signal_connect(item, "activate", (GCallback)on_automation_set_upper, ame);
 535         gtk_menu_shell_append(GTK_MENU_SHELL(submenu), item);
 536         //g_signal_connect(item, "activate", (GCallback)on_automation_add, this);
 537
 538     }
 539
 540     gtk_widget_show_all(menu);
 541     gtk_menu_popup(GTK_MENU(menu), NULL, NULL, NULL, NULL, 3, gtk_get_current_event_time());
 542 }
 543
 544 plugin_gui::~plugin_gui()
 545 {
 546     cleanup_automation_entries();
 547     delete preset_access;
 548     for (std::vector<param_control *>::iterator i = params.begin(); i != params.end(); i++)
 549     {
 550         delete *i;
 551     }
 552 }
 553
 554 /***************************** GUI environment ********************************************/
 555
 556 bool window_update_controller::check_redraw(GtkWidget *toplevel)
 557 {
 558     GdkWindow *gdkwin = gtk_widget_get_window(toplevel);
 559     if (!gdkwin)
 560         return false;
 561
 562     if (!gdk_window_is_viewable(gdkwin))
 563         return false;
 564     GdkWindowState state = gdk_window_get_state(gdkwin);
 565     if (state & GDK_WINDOW_STATE_ICONIFIED)
 566     {
 567         ++refresh_counter;
 568         if (refresh_counter & 15)
 569             return false;
 570     }
 571     return true;
 572 }
 573
 574 /***************************** GUI environment ********************************************/
 575
 576 gui_environment::gui_environment()
 577 {
 578     keyfile = g_key_file_new();
 579
 580     gchar *fn = g_build_filename(getenv("HOME"), ".calfrc", NULL);
 581     string filename = fn;
 582     g_free(fn);
 583     g_key_file_load_from_file(keyfile, filename.c_str(), (GKeyFileFlags)(G_KEY_FILE_KEEP_COMMENTS | G_KEY_FILE_KEEP_TRANSLATIONS), NULL);
 584
 585     config_db = new calf_utils::gkeyfile_config_db(keyfile, filename.c_str(), "gui");
 586     gui_config.load(config_db);
 587 }
 588
 589 gui_environment::~gui_environment()
 590 {
 591     delete config_db;
 592     if (keyfile)
 593         g_key_file_free(keyfile);
 594 }