+extern "C" {
+static void
+gtkcombo_text_changed_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
+{
+ if (combo->m_ignoreNextUpdate)
+ {
+ combo->m_ignoreNextUpdate = false;
+ return;
+ }
+
+ if (!combo->m_hasVMT) return;
+
+ wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
+ event.SetString( combo->GetValue() );
+ event.SetEventObject( combo );
+ combo->GetEventHandler()->ProcessEvent( event );
+}
+}
+
+extern "C" {
+static void
+gtkcombo_dummy_callback(GtkEntry *WXUNUSED(entry), GtkCombo *WXUNUSED(combo))
+{
+}
+}
+
+extern "C" {
+static void
+gtkcombo_popup_hide_callback(GtkCombo *WXUNUSED(gtk_combo), wxComboBox *combo)
+{
+ // when the popup is hidden, throw a SELECTED event only if the combobox
+ // selection changed.
+ const int curSelection = combo->GetCurrentSelection();
+
+ const bool hasChanged = curSelection != g_SelectionBeforePopup;
+
+ // reset the selection flag to value meaning that it is hidden and do it
+ // now, before generating the events, so that GetSelection() returns the
+ // new value from the event handler
+ g_SelectionBeforePopup = wxID_NONE;
+
+ if ( hasChanged )
+ {
+ wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
+ event.SetInt( curSelection );
+ event.SetString( combo->GetStringSelection() );
+ event.SetEventObject( combo );
+ combo->GetEventHandler()->ProcessEvent( event );
+
+ // for consistency with the other ports, send TEXT event
+ wxCommandEvent event2( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
+ event2.SetString( combo->GetStringSelection() );
+ event2.SetEventObject( combo );
+ combo->GetEventHandler()->ProcessEvent( event2 );
+ }
+}
+}
+
+extern "C" {
+static void
+gtkcombo_popup_show_callback(GtkCombo *WXUNUSED(gtk_combo), wxComboBox *combo)
+{
+ // store the combobox selection value before the popup is shown
+ g_SelectionBeforePopup = combo->GetCurrentSelection();
+}
+}