on screen keyboard error with gtk_main_do_event

[Rúben Rodrigues <ruben_gr live com pt>]

HI guys,

I have a on-screen keyboard that was made for gtk2. Now in gtk3 i get 
this errors:

Gdk-CRITICAL **: gdk_window_get_user_data: assertion 'GDK_IS_WINDOW 
(window)' failed

Gdk-CRITICAL **: gdk_window_get_display: assertion 'GDK_IS_WINDOW 
(window)' failed

  Gdk-WARNING **: Event with type 8 not holding a GdkDevice. It is most 
likely synthesized outside Gdk/GTK+


  Gdk-CRITICAL **: gdk_window_get_display: assertion 'GDK_IS_WINDOW 
(window)' failed

Gdk-CRITICAL **: gdk_display_get_device_manager: assertion 
'GDK_IS_DISPLAY (display)' failed

Gdk-CRITICAL **: gdk_device_manager_get_client_pointer: assertion 
'GDK_IS_DEVICE_MANAGER (device_manager)' failed

Gdk-CRITICAL **: gdk_device_get_associated_device: assertion 
'GDK_IS_DEVICE (device)' failed

  Gdk-CRITICAL **: gdk_device_grab_info_libgtk_only: assertion 
'GDK_IS_DISPLAY (display)' failed


This appears in this line of code : gtk_main_do_event(pxEvent);

Here is complete code:


void on_Keypad_button_clicked(GtkButton *button, gpointer data)
{
     GdkEvent            *pxEvent = NULL;

     GdkKeymapKey        *keys;
     gint                iNkeys;

     guint                cKey;

     GtkEntryBuffer        *pxBuffer;


     struct xParam_Widget_Keycode    *pxData;

     pxData = (struct xParam_Widget_Keycode *)data;

     switch(cKey = pxData->iKeyCode) {
     case GDK_KEY_BackSpace:
         pxBuffer = gtk_entry_get_buffer(GTK_ENTRY(pxData->pxWidget));
         gtk_entry_buffer_delete_text(pxBuffer, 
gtk_entry_buffer_get_length(pxBuffer) - 1, -1);
         break;
     default:
         pxEvent = gdk_event_new(GDK_KEY_PRESS);
if(gdk_keymap_get_entries_for_keyval(gdk_keymap_get_default(), cKey, 
&keys, &iNkeys)) {
             pxEvent->key.hardware_keycode = keys[0].keycode;
             pxEvent->key.group = keys[0].group;
             g_free(keys);
             pxEvent->key.keyval = gdk_unicode_to_keyval(cKey);
         } else {
             pxEvent->key.keyval = cKey;
         }

         pxEvent->key.window = g_object_ref(gtk_widget_get_screen 
(pxData->pxWidget));
         pxEvent->key.state = 0;

         pxEvent->key.send_event = FALSE;
         pxEvent->key.time = GDK_CURRENT_TIME;

         gtk_main_do_event(pxEvent);
         pxEvent->key.type = GDK_KEY_RELEASE;
         gtk_main_do_event(pxEvent);
         gdk_event_free(pxEvent);
     }
}

Thanks