Set the column for wxEVT_DATAVIEW_ITEM_ACTIVATED in wxGTK

The column is available in the GTK+ callback, so just pass it along to
avoid gratuitous inconsistency with the generic version.

Also update the sample to show the column value for these events.

docs/changes.txt

@@ -135,6 +135,7 @@ wxGTK:
 - Fix not showing wxInfoBar with GTK+ 3 < 3.22.29.
 - Fix the build with glib < 2.32 (e.g. CentOS 6).
 - Fix field widths in wxStatusBar showing a size grip.
+- Fill column value in wxEVT_DATAVIEW_ITEM_ACTIVATED events.
 
 wxMSW:
 

samples/dataview/dataview.cpp

@@ -1214,7 +1214,8 @@ void MyFrame::OnValueChanged( wxDataViewEvent &event )
 void MyFrame::OnActivated( wxDataViewEvent &event )
 {
     wxString title = m_music_model->GetTitle( event.GetItem() );
-    wxLogMessage( "wxEVT_DATAVIEW_ITEM_ACTIVATED, Item: %s", title );
+    wxLogMessage( "wxEVT_DATAVIEW_ITEM_ACTIVATED, Item: %s; Column: %d",
+                  title, event.GetColumn() );
 
     if (m_ctrl[0]->IsExpanded( event.GetItem() ))
     {

src/gtk/dataview.cpp

@@ -4461,10 +4461,11 @@ wxdataview_selection_changed_callback( GtkTreeSelection* WXUNUSED(selection), wx
 
 static void
 wxdataview_row_activated_callback( GtkTreeView* WXUNUSED(treeview), GtkTreePath *path,
-                                   GtkTreeViewColumn *WXUNUSED(column), wxDataViewCtrl *dv )
+                                   GtkTreeViewColumn *column, wxDataViewCtrl *dv )
 {
     wxDataViewItem item(dv->GTKPathToItem(path));
-    wxDataViewEvent event(wxEVT_DATAVIEW_ITEM_ACTIVATED, dv, item);
+    wxDataViewEvent
+        event(wxEVT_DATAVIEW_ITEM_ACTIVATED, dv, dv->GTKColumnToWX(column), item);
     dv->HandleWindowEvent( event );
 }