musicus_mobile/desktop/linux/my_application.cc

#include "my_application.h"

#include <flutter_linux/flutter_linux.h>
#include <glib-object.h>

#include "flutter/generated_plugin_registrant.h"

struct _MyApplication {
  GtkApplication parent_instance;
};

G_DEFINE_TYPE(MyApplication, my_application, GTK_TYPE_APPLICATION)

// Implements GApplication::activate.
static void my_application_activate(GApplication* application) {
  GtkWindow* window =
      GTK_WINDOW(gtk_application_window_new(GTK_APPLICATION(application)));
  gtk_window_set_title(window, "Musicus");
  gtk_window_set_default_size(window, 640, 453);
  gtk_widget_show(GTK_WIDGET(window));

  g_autoptr(FlDartProject) project = fl_dart_project_new();

  FlView* view = fl_view_new(project);
  gtk_widget_show(GTK_WIDGET(view));
  gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(view));

  fl_register_plugins(FL_PLUGIN_REGISTRY(view));

  gtk_widget_grab_focus(GTK_WIDGET(view));
}

static void my_application_startup(GApplication* application) {
  G_APPLICATION_CLASS(my_application_parent_class)->startup(application);
  g_object_set(gtk_settings_get_default(),
      "gtk-application-prefer-dark-theme", TRUE, NULL);
}

static void my_application_class_init(MyApplicationClass* klass) {
  G_APPLICATION_CLASS(klass)->startup = my_application_startup;
  G_APPLICATION_CLASS(klass)->activate = my_application_activate;
}

static void my_application_init(MyApplication* self) {}

MyApplication* my_application_new() {
  return MY_APPLICATION(g_object_new(my_application_get_type(), nullptr));
}