/// The struct holding the data for one level
/// Holds the wx control and other data
/// such as the vector of attribute keys corresponding to the columns
/// The struct holding the data for one level
/// Holds the wx control and other data
/// such as the vector of attribute keys corresponding to the columns
// If set to true then OnSelectedChanged returns immediately.
// Used to do avoid useless process during multiple selections
// If set to true then OnSelectedChanged returns immediately.
// Used to do avoid useless process during multiple selections