/// <summary>
/// Clears all filter values. Call this function before applying new filter values.
/// </summary>
/// <param name="filter_name">name of the filter</param>
private void ClearFilter(string filter_name)
{
if (!_currentSession.IsOpenedOrCreated)
{
return;
}
//get a reference to a graph using its name
Graph graph = _currentRun.Graphs[_lastGraph];
//get a reference to a filter using its name
FilterItem fi = graph.Filter[filter_name];
//clear filter values
fi.ClearValues();
}