C - GTK - g_application_quit

问题

I have a problem with quitting a gtk application. The function call of g_application_quit results in the subsequent error:

GLib-GIO-CRITICAL **: g_application_quit: assertion 'G_IS_APPLICATION (application)' failed

The code snippet looks like this:

g_signal_connect(app_window, "destroy", G_CALLBACK(g_application_quit), app);

I tried this also, but still throws the same error:

g_signal_connect(app_window, "destroy", G_CALLBACK(g_application_quit), G_APPLICATION(app));

The app got initialized as:

GtkApplication *app = gtk_application_new("my.ne.sweeper", G_APPLICATION_FLAGS_NONE);

Any help is appreciated. Thank you.

回答1:

You don't need to connect g_application_quit to window's destroy signal explicitly if You are using G_APPLICATION, it is done automatically.

Here goes the minimalistic example:

#include <gtk/gtk.h>

static void activate (GtkApplication* app, gpointer data) {
  GtkWidget *window;

  window = gtk_application_window_new(app);
  gtk_window_set_default_size(GTK_WINDOW (window), 400, 200);
  gtk_widget_show_all(window);
}

int main (int argc, char **argv) {
  GtkApplication *app;
  int status;

  app = gtk_application_new("your.app.name", G_APPLICATION_FLAGS_NONE);
  g_signal_connect(app, "activate", G_CALLBACK (activate), NULL);
  status = g_application_run(G_APPLICATION(app), argc, argv);
  g_object_unref(app);

  return status;
}

来源：https://stackoverflow.com/questions/43029025/c-gtk-g-application-quit

标签

gtk

gtk3