Simplified getting default Gtk::Application object

src/dialog.cpp

@@ -3,10 +3,7 @@
 #include <cmath>
 
 Dialog::Message::Message(const std::string &text, std::function<void()> &&on_cancel, bool show_progress_bar) : Gtk::Window(Gtk::WindowType::WINDOW_POPUP) {
-  auto g_application = g_application_get_default();
+  set_transient_for(*Glib::RefPtr<Gtk::Application>::cast_dynamic(Gtk::Application::get_default())->get_active_window());
-  auto gio_application = Glib::wrap(g_application, true);
-  auto application = Glib::RefPtr<Gtk::Application>::cast_static(gio_application);
-  set_transient_for(*application->get_active_window());
 
   set_position(Gtk::WindowPosition::WIN_POS_CENTER_ON_PARENT);
   set_modal(true);
@@ -83,10 +80,7 @@ std::string Dialog::gtk_dialog(const boost::filesystem::path &path, const std::s
   Gtk::FileChooserDialog dialog(title, action);
 #endif
 
-  auto g_application = g_application_get_default();
+  dialog.set_transient_for(*Glib::RefPtr<Gtk::Application>::cast_dynamic(Gtk::Application::get_default())->get_active_window());
-  auto gio_application = Glib::wrap(g_application, true);
-  auto application = Glib::RefPtr<Gtk::Application>::cast_static(gio_application);
-  dialog.set_transient_for(*application->get_active_window());
   dialog.set_position(Gtk::WindowPosition::WIN_POS_CENTER_ON_PARENT);
 
   if(title == "Save File As")

src/menu.cpp

@@ -572,17 +572,11 @@ const Glib::ustring menu_xml = R"RAW(<interface>
 )RAW";
 
 void Menu::add_action(const std::string &name, const std::function<void()> &action) {
-  auto g_application = g_application_get_default();
+  actions[name] = Glib::RefPtr<Gtk::Application>::cast_dynamic(Gtk::Application::get_default())->add_action(name, action);
-  auto gio_application = Glib::wrap(g_application, true);
-  auto application = Glib::RefPtr<Gtk::Application>::cast_static(gio_application);
-
-  actions[name] = application->add_action(name, action);
 }
 
 void Menu::set_keys() {
-  auto g_application = g_application_get_default();
+  auto application = Glib::RefPtr<Gtk::Application>::cast_dynamic(Gtk::Application::get_default());
-  auto gio_application = Glib::wrap(g_application, true);
-  auto application = Glib::RefPtr<Gtk::Application>::cast_static(gio_application);
 
   for(auto &key : Config::get().menu.keys) {
     if(actions.find(key.first) != actions.end()) {

src/selection_dialog.cpp

@@ -37,10 +37,7 @@ void SelectionDialogBase::ListViewText::clear() {
 
 SelectionDialogBase::SelectionDialogBase(Source::BaseView *view_, const boost::optional<Gtk::TextIter> &start_iter, bool show_search_entry_, bool use_markup)
     : start_mark(start_iter ? Source::Mark(*start_iter) : Source::Mark()), view(view_), window(Gtk::WindowType::WINDOW_POPUP), vbox(Gtk::Orientation::ORIENTATION_VERTICAL), list_view_text(use_markup), show_search_entry(show_search_entry_) {
-  auto g_application = g_application_get_default();
+  window.set_transient_for(*Glib::RefPtr<Gtk::Application>::cast_dynamic(Gtk::Application::get_default())->get_active_window());
-  auto gio_application = Glib::wrap(g_application, true);
-  auto application = Glib::RefPtr<Gtk::Application>::cast_static(gio_application);
-  window.set_transient_for(*application->get_active_window());
 
   window.set_type_hint(Gdk::WindowTypeHint::WINDOW_TYPE_HINT_COMBO);
 
@@ -68,10 +65,7 @@ SelectionDialogBase::SelectionDialogBase(Source::BaseView *view_, const boost::o
   window.add(vbox);
 
   list_view_text.signal_realize().connect([this]() {
-    auto g_application = g_application_get_default();
+    auto application_window = Glib::RefPtr<Gtk::Application>::cast_dynamic(Gtk::Application::get_default())->get_active_window();
-    auto gio_application = Glib::wrap(g_application, true);
-    auto application = Glib::RefPtr<Gtk::Application>::cast_static(gio_application);
-    auto application_window = application->get_active_window();
 
     // Calculate window width and height
     int row_width = 0, padding_height = 0, window_height = 0;

src/tooltips.cpp

@@ -48,10 +48,7 @@ void Tooltip::show(bool disregard_drawn, const std::function<void()> &on_motion)
     //init window
     window = std::make_unique<Gtk::Window>(Gtk::WindowType::WINDOW_POPUP);
 
-    auto g_application = g_application_get_default();
+    if(auto active_window = Glib::RefPtr<Gtk::Application>::cast_dynamic(Gtk::Application::get_default())->get_active_window())
-    auto gio_application = Glib::wrap(g_application, true);
-    auto application = Glib::RefPtr<Gtk::Application>::cast_static(gio_application);
-    if(auto active_window = application->get_active_window())
       window->set_transient_for(*active_window);
 
     window->set_type_hint(Gdk::WindowTypeHint::WINDOW_TYPE_HINT_TOOLTIP);