[Freeciv-Dev] (PR#13419) mouse wheel can break GTK client

["Mateusz Stefek" <mstefek@xxxxxxxxx>]

<URL: http://bugs.freeciv.org/Ticket/Display.html?id=13419 >

Hello. We have found anoying problem which occurs when a GtkPaned is
inserted as a page to a GtkNotebook.
When you move your mouse over that handle which is used to adjust
division in GtkPaned and you use your mouse whell then the page is
changed in the notebook.
Even if this looks ok for someone, this is a major problem for us.
Because we hide pages on the GtkNotebook from users and we don't want to
allow user to change pages when he wants. Of course we use
gtk_notebook_set_show_tabs(notebook, FALSE).
This is a way we implement different screens in Freeciv.

Can anyone help us?
I've attached a simple program, which demonstrates the problem.

--
Freeciv developers

#include <gtk/gtk.h>

int main(int argc, char* argv[])
{
  GtkWidget* window, *notebook, *paned;

  gtk_init(&argc, &argv);  

  window = gtk_window_new(GTK_WINDOW_TOPLEVEL);

  notebook = gtk_notebook_new();
  gtk_container_add(GTK_CONTAINER(window), notebook);
  
  gtk_notebook_append_page(GTK_NOTEBOOK(notebook),
                           gtk_label_new("Page 1"),
                           gtk_label_new("Page 1"));
                           
  paned = gtk_vpaned_new();
  gtk_notebook_append_page(GTK_NOTEBOOK(notebook),
                            paned,
                            gtk_label_new("Page 2"));
  gtk_paned_add1(GTK_PANED(paned), gtk_label_new("Top"));
  gtk_paned_add2(GTK_PANED(paned), gtk_label_new("Bottom"));

  gtk_notebook_append_page(GTK_NOTEBOOK(notebook),
                           gtk_label_new("Page 3"),
                           gtk_label_new("Page 3"));


  gtk_widget_show_all(window);
  gtk_main();
}