_previous_button->Bind (wxEVT_BUTTON, boost::bind(&PlaylistControls::previous_clicked, this));
_spl_view->Bind (wxEVT_LIST_ITEM_SELECTED, boost::bind(&PlaylistControls::spl_selection_changed, this));
_spl_view->Bind (wxEVT_LIST_ITEM_DESELECTED, boost::bind(&PlaylistControls::spl_selection_changed, this));
_previous_button->Bind (wxEVT_BUTTON, boost::bind(&PlaylistControls::previous_clicked, this));
_spl_view->Bind (wxEVT_LIST_ITEM_SELECTED, boost::bind(&PlaylistControls::spl_selection_changed, this));
_spl_view->Bind (wxEVT_LIST_ITEM_DESELECTED, boost::bind(&PlaylistControls::spl_selection_changed, this));