/**
Returns the position of the column in the control or -1
if no column field was set by the event emitter.
/**
Returns the position of the column in the control or -1
if no column field was set by the event emitter.
items have been read from the model by the control.
*/
virtual void ExpandAncestors( const wxDataViewItem & item );
items have been read from the model by the control.
*/
virtual void ExpandAncestors( const wxDataViewItem & item );
/**
Returns pointer to the column. @a pos refers to the position in the
control which may change after reordering columns by the user.
/**
Returns pointer to the column. @a pos refers to the position in the
control which may change after reordering columns by the user.