How to give keyboard focus to a pop-up Gtk.Window - gtk

Question

I have a pop-up window (created using the WINDOW_POPUP type) which contains some widgets on it, including a text entry. The problem is that the entry doesn't get the focus when I click on it, so I can't type anything. Is there any flag I have to set to allow the window to get the keyboard focus?

Answer 1

You can not use WINDOW_POPUP for gtk-windows that require the focus. Instead you should use a GtkWindow with type GTK_WINDOW_TOPLEVEL and call the next functions (or methods)
GtkWindow *result = g_object_new(GTK_TYPE_WINDOW, "type", GTK_WINDOW_TOPLEVEL, NULL);
gtk_widget_set_can_focus(result, TRUE);
gtk_window_set_decorated(GTK_WINDOW(result), FALSE);
gtk_window_set_type_hint(GTK_WINDOW(result), GDK_WINDOW_TYPE_HINT_POPUP_MENU);
gtk_window_set_transient_for(GTK_WINDOW(result), main_top_level_window);
This worked for me ... unfortunately the icon in the window-list blinks short when this 'popup' is destroyed

Answer 2

Despite the previous answers and the GTK Reference, it is possible to grab the keyboard focus when using a GTK_WINDOW_POPUP. You need to connect to the "show" event...
GtkWindow *w = gtk_window_new(GTK_WINDOW_POPUP);
g_signal_connect(G_OBJECT(w), "show", G_CALLBACK(on_window_show), NULL);
... with a callback that tries to grab the keyboard:
static void on_window_show(GtkWidget *w, gpointer user_data) {
/* grabbing might not succeed immediately... */
while (gdk_keyboard_grab(w->window, FALSE, GDK_CURRENT_TIME) != GDK_GRAB_SUCCESS) {
/* ...wait a while and try again */
sleep(0.1);
}
}
That works for me pretty well.

Answer 3

#include <gtk/gtk.h>
static gboolean delete_event( GtkWidget *widget,
GdkEvent *event,
gpointer data )
{
g_print ("delete event occurred\n");
gtk_main_quit ();
return TRUE;
}
static void destroy( GtkWidget *widget,
gpointer data )
{
gtk_main_quit ();
}
int main( int argc,
char *argv[] )
{
GtkWidget *window;
GtkWidget *windowpopup;
GtkWidget *button;
gtk_init (&argc, &argv);
/* create a new window */
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
windowpopup = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_transient_for(GTK_WINDOW(windowpopup),GTK_WINDOW(window));
gtk_window_set_destroy_with_parent(GTK_WINDOW(windowpopup),TRUE);
gtk_widget_show (windowpopup);
g_signal_connect (G_OBJECT (window), "delete_event",
G_CALLBACK (delete_event), NULL);
g_signal_connect (G_OBJECT (window), "destroy",
G_CALLBACK (destroy), NULL);
/* Creates a new button with the label "Hello World". */
button = gtk_button_new_with_label ("Hello World");
g_signal_connect_swapped (G_OBJECT (button), "clicked",
G_CALLBACK (gtk_widget_destroy),
G_OBJECT (window));
gtk_container_add (GTK_CONTAINER (window), button);
gtk_widget_show (button);
gtk_widget_show (window);
gtk_main ();
return 0;
}