/*
 * Enhancing the main menu example of gtkmm-tutorial/unstable presented in
 * https://developer.gnome.org/gtkmm-tutorial/unstable/\
 *       sec-menus-examples.html.de#menu-example-main
 * to show an application menu as suggested in
 * https://wiki.gnome.org/ThreePointThree/Features/ApplicationMenu,
 * described in
 * https://wiki.gnome.org/HowDoI/ApplicationMenu
 * and realised using gtkmm in
 * https://git.gnome.org/browse/gtkmm-documentation/tree/examples/book/\
 *       application/app_and_win_menus
 *
 * Started on 2014-11-10
 * Current version: 2014-11-10
 * Performed by: Jürgen Kleber (jkleber2701 t-online de)
 *
 * Original file downloaded on Sunday, 9th of November, 2014 from
 * https://git.gnome.org/browse/gtkmm-documentation/tree/examples/book/\
 *       application/app_and_win_menus/exampleapplication.cc
 */

#include "exampleapplication.h"
#include "examplewindow.h"
#include <iostream>

ExampleApplication::ExampleApplication() :
      Gtk::Application("org.gtkmm.examples.application") {
   Glib::set_application_name("Gtk::Application Example");
   win = 0;
}

Glib::RefPtr<ExampleApplication> ExampleApplication::create() {
   return Glib::RefPtr<ExampleApplication>(new ExampleApplication());
}

void ExampleApplication::on_startup() {
   //Call the base class's implementation:
   Gtk::Application::on_startup();

   //File|New sub menu:
   newstandard_action = add_action("newstandard",
         sigc::mem_fun(*this, &ExampleApplication::on_menu_file_new_generic));

   newfoo_action = add_action("newfoo",
         sigc::mem_fun(*this, &ExampleApplication::on_menu_file_new_generic));

   newgoo_action = add_action("newgoo",
         sigc::mem_fun(*this, &ExampleApplication::on_menu_file_new_generic));

   //File menu:
   quit_action = add_action("quit",
         sigc::mem_fun(*this, &ExampleApplication::on_menu_file_quit));

   //Help menu:
   about_action = add_action("about",
         sigc::mem_fun(*this, &ExampleApplication::on_menu_others));

   m_refBuilder = Gtk::Builder::create();

   //Layout the actions in a menubar and toolbar:
   Glib::ustring ui_info =
      "<interface>"
      "  <menu id='menu-example'>"
      "    <submenu>"
      "      <attribute name='label' translatable='yes'>_File</attribute>"
      "      <section>"
      "        <item>"
      "          <attribute name='label' translatable='yes'>New _Standard</attribute>"
      "          <attribute name='action'>app.newstandard</attribute>"
      "          <attribute name='accel'>&lt;Primary&gt;n</attribute>"
      "        </item>"
      "        <item>"
      "          <attribute name='label' translatable='yes'>New _Foo</attribute>"
      "          <attribute name='action'>app.newfoo</attribute>"
      "        </item>"
      "        <item>"
      "          <attribute name='label' translatable='yes'>New _Goo</attribute>"
      "          <attribute name='action'>app.newgoo</attribute>"
      "        </item>"
      "      </section>"
      "      <section>"
      "        <item>"
      "          <attribute name='label' translatable='yes'>_Quit</attribute>"
      "          <attribute name='action'>app.quit</attribute>"
      "          <attribute name='accel'>&lt;Primary&gt;q</attribute>"
      "        </item>"
      "      </section>"
      "    </submenu>"
      "    <submenu>"
      "      <attribute name='label' translatable='yes'>_Edit</attribute>"
      "      <section>"
      "        <item>"
      "          <attribute name='label' translatable='yes'>_Copy</attribute>"
      "          <attribute name='action'>win.copy</attribute>"
      "          <attribute name='accel'>&lt;Primary&gt;c</attribute>"
      "        </item>"
      "        <item>"
      "          <attribute name='label' translatable='yes'>_Paste</attribute>"
      "          <attribute name='action'>win.paste</attribute>"
      "          <attribute name='accel'>&lt;Primary&gt;v</attribute>"
      "        </item>"
      "        <item>"
      "          <attribute name='label' translatable='yes'>_Something</attribute>"
      "          <attribute name='action'>win.something</attribute>"
      "        </item>"
      "      </section>"
      "    </submenu>"
      "    <submenu>"
      "      <attribute name='label' translatable='yes'>_Choices</attribute>"
      "      <section>"
      "        <item>"
      "          <attribute name='label' translatable='yes'>Choice _A</attribute>"
      "          <attribute name='action'>win.choice</attribute>"
      "          <attribute name='target'>a</attribute>"
      "        </item>"
      "        <item>"
      "          <attribute name='label' translatable='yes'>Choice _B</attribute>"
      "          <attribute name='action'>win.choice</attribute>"
      "          <attribute name='target'>b</attribute>"
      "        </item>"
      "      </section>"
      "    </submenu>"
      "    <submenu>"
      "      <attribute name='label' translatable='yes'>_Other Choices</attribute>"
      "      <section>"
      "        <item>"
      "          <attribute name='label' translatable='yes'>Choice 1</attribute>"
      "          <attribute name='action'>win.choiceother</attribute>"
      "          <attribute name='target' type='i'>1</attribute>"
      "        </item>"
      "        <item>"
      "          <attribute name='label' translatable='yes'>Choice 2</attribute>"
      "          <attribute name='action'>win.choiceother</attribute>"
      "          <attribute name='target' type='i'>2</attribute>"
      "        </item>"
      "      </section>"
      "      <section>"
      "        <item>"
      "          <attribute name='label' translatable='yes'>Some Toggle</attribute>"
      "          <attribute name='action'>win.sometoggle</attribute>"
      "        </item>"
      "      </section>"
      "    </submenu>"
      "    <submenu>"
      "      <attribute name='label' translatable='yes'>_Help</attribute>"
      "      <section>"
      "        <item>"
      "          <attribute name='label' translatable='yes'>_About</attribute>"
      "          <attribute name='action'>app.about</attribute>"
      "        </item>"
      "      </section>"
      "    </submenu>"
      "  </menu>"
      "  <menu id='appmenu'>"
      "    <submenu>"
      "      <attribute name='label' translatable='yes'>_File</attribute>"
      "      <section>"
      "        <item>"
      "          <attribute name='label' translatable='yes'>New _Standard</attribute>"
      "          <attribute name='action'>app.newstandard</attribute>"
      "          <attribute name='accel'>&lt;Primary&gt;n</attribute>"
      "        </item>"
      "        <item>"
      "          <attribute name='label' translatable='yes'>New _Foo</attribute>"
      "          <attribute name='action'>app.newfoo</attribute>"
      "        </item>"
      "        <item>"
      "          <attribute name='label' translatable='yes'>New _Goo</attribute>"
      "          <attribute name='action'>app.newgoo</attribute>"
      "        </item>"
      "      </section>"
      "      <section>"
      "        <item>"
      "          <attribute name='label' translatable='yes'>_Quit</attribute>"
      "          <attribute name='action'>app.quit</attribute>"
      "          <attribute name='accel'>&lt;Primary&gt;q</attribute>"
      "        </item>"
      "      </section>"
      "    </submenu>"
      "    <submenu>"
      "      <attribute name='label' translatable='yes'>_Help</attribute>"
      "      <section>"
      "        <item>"
      "          <attribute name='label' translatable='yes'>_About</attribute>"
      "          <attribute name='action'>app.about</attribute>"
      "        </item>"
      "      </section>"
      "    </submenu>"
      "  </menu>"
      "</interface>";

   try {
      m_refBuilder->add_from_string(ui_info);
   } catch (const Glib::Error& ex) {
      std::cerr << "building menus failed: " << ex.what();
   }

   //Get the menubar and add it to a container widget:
   Glib::RefPtr<Glib::Object> object = m_refBuilder->get_object("menu-example");
   Glib::RefPtr<Gio::Menu> gmenu = Glib::RefPtr<Gio::Menu>::cast_dynamic(
         object);
   object = m_refBuilder->get_object("appmenu");
   Glib::RefPtr<Gio::Menu> appMenu = Glib::RefPtr<Gio::Menu>::cast_dynamic(
         object);
   if (!(gmenu && appMenu)) {
      g_warning("GMenu or AppMenu not found");
   } else {
      set_app_menu(appMenu);
      set_menubar(gmenu);
   }
}

void ExampleApplication::create_window() {
   win = new ExampleWindow();

   //Make sure that the application runs for as long this window is still open:
   add_window(*win);

   //Delete the window when it is hidden.
   //That's enough for this simple example.
   win->signal_hide().connect(
         sigc::bind<Gtk::Window*>(
               sigc::mem_fun(*this, &ExampleApplication::on_window_hide), win));

   win->show_all();
}

void ExampleApplication::on_window_hide(Gtk::Window* window) {
   delete window;
}

void ExampleApplication::on_activate() {
   //std::cout << "debug1: " << G_STRFUNC << std::endl;
   // The application has been started, so let's show a window.
   // A real application might want to reuse this "empty" window in on_open(),
   // when asked to open a file, if no changes have been made yet.
   create_window();
}

void ExampleApplication::on_menu_file_new_generic() {
   std::cout << "A File|New menu item was selected." << std::endl;
}

void ExampleApplication::on_menu_file_quit() {
   std::cout << G_STRFUNC << std::endl;
   quit(); // Not really necessary, when Gtk::Widget::hide() is called.

   // Gio::Application::quit() will make Gio::Application::run() return,
   // but it's a crude way of ending the program. The window is not removed
   // from the application. Neither the window's nor the application's
   // destructors will be called, because there will be remaining reference
   // counts in both of them. If we want the destructors to be called, we
   // must remove the window from the application. One way of doing this
   // is to hide the window.
   std::vector<Gtk::Window*> windows = get_windows();
   if (windows.size() > 0)
      windows[0]->hide(); // In this simple case, we know there is only one window.
}

void ExampleApplication::on_menu_others() {
   std::cout << "A menu item was selected." << std::endl;
}