c - How to drag & drop (move) GtkWindow using GtkGestureLongPress? - Stack Overflow

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I am trying to move GtkWindow via GtkGestureLongPress. I want to implement it in VTE base terminal app. My script is given below. The problem is -

I ran the ping(ping 127.0.0.1) command in the terminal, when I tried to move the window by long pressing, the vte terminal stopped updating (output of the ping command pause). Unable to release it from the longpress event, need to click on the window/terminal to see the terminal output (updated output of ping command).

Can anybody check it please?

#include <gtk/gtk.h>
#include <vte/vte.h>

GtkWidget *window;
GtkWidget *terminal;

static void
child_ready(VteTerminal *terminal, GPid pid, GError *error, gpointer user_data)
{
    if (!terminal) return;
    if (pid == -1) gtk_window_destroy((GtkWindow    *)window);
}

static void run_terminal()
{
    /* Start a new shell */
    gchar **envp = g_get_environ();
    //gchar **command = (gchar *[]){g_strdup(g_environ_getenv(envp, "SHELL")), NULL};
    gchar **command = (gchar *[]){g_strdup(g_environ_getenv(envp, "SHELL")),
                          "-c", "/bin/bash",  NULL};                      
    g_strfreev(envp);
    /* Spawn terminal asynchronously */
    vte_terminal_spawn_async(VTE_TERMINAL(terminal),
                         VTE_PTY_DEFAULT,   /* pty flag */
                         NULL,        /* working directory */
                         command,           /* argv */
                         NULL,              /* environment variables */
                         G_SPAWN_DEFAULT,   /* spawn flag */
                         NULL,              /* child setup function */
                         NULL,              /* child setup data */
                         NULL,              /* child setup data destroy */
                         -1,                /* timeout */
                         NULL,              /* cancellable */
                         child_ready, /* async callback */
                         NULL);             /* callback data */   

}


void drag_on_long_press (GtkGestureLongPress* gesture,
                         gdouble x,
                         gdouble y,
                         gpointer user_data)
{
    GdkSurface *surface;
    GdkEvent *event;
    guint btn;

    const graphene_point_t *point = graphene_point_init (graphene_point_alloc (), x, y);
    graphene_point_t *point1 = graphene_point_init (graphene_point_alloc (), x, y);

    GdkEventSequence *sequence = gtk_gesture_get_last_updated_sequence ((GtkGesture *)gesture);
    event = gtk_gesture_get_last_event ((GtkGesture *)gesture, sequence);

    GtkWidget *widget = gtk_event_controller_get_widget ((GtkEventController *)gesture);
    GdkDevice *device = gtk_gesture_get_device ((GtkGesture *)gesture);
    guint32 timestamp = gdk_event_get_time (event);

    if (gdk_event_get_event_type (event) == GDK_BUTTON_PRESS){
        btn = gdk_button_event_get_button (event);

        if (!gtk_widget_compute_point (widget, GTK_WIDGET (gtk_widget_get_root (widget)), point, point1))
        return;

        surface = gtk_native_get_surface (gtk_widget_get_native (widget));

        gdk_toplevel_begin_move(GDK_TOPLEVEL (surface), device, 
                                btn, x+12, y+12, timestamp);
        gtk_event_controller_reset ((GtkEventController *)gesture);

    }else{
           btn = 0;
    }

    graphene_point_free(point1);
    free((void*)point);
}




static void
activate (GtkApplication *app,
      gpointer        user_data)
{
  window = gtk_application_window_new (app);
  gtk_window_set_title (GTK_WINDOW (window), "Window");
  gtk_window_set_default_size (GTK_WINDOW (window), 660, 300);

    GtkGesture* ges = gtk_gesture_long_press_new();
    gtk_gesture_single_set_button(GTK_GESTURE_SINGLE(ges), GDK_BUTTON_PRIMARY);
    gtk_event_controller_set_propagation_phase((GtkEventController *)ges, GTK_PHASE_CAPTURE);
    gtk_widget_add_controller (window, GTK_EVENT_CONTROLLER (ges));
    g_signal_connect (ges, "pressed", G_CALLBACK (drag_on_long_press), NULL);

  GtkWidget *scrollview;
  scrollview = gtk_scrolled_window_new();
  gtk_window_set_child ((GtkWindow *)window, scrollview);

  terminal = vte_terminal_new();
  gtk_scrolled_window_set_child ((GtkScrolledWindow *)scrollview, terminal);

  run_terminal();

  gtk_window_present ((GtkWindow *)window);
}

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

  app = gtk_application_new (".gtk.example", G_APPLICATION_DEFAULT_FLAGS);
  g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
  status = g_application_run (G_APPLICATION (app), argc, argv);
  g_object_unref (app);

  return status;
}

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