/// <summary>
/// Occurs when setting symbology to a new scheme and allows adding event handlers
/// </summary>
/// <param name="scheme">
/// </param>
protected virtual void OnIncludeScheme(IFeatureScheme scheme)
{
if (scheme == null)
{
return;
}
scheme.ItemChanged += SchemeItemChanged;
scheme.SetParentItem(this);
scheme.SelectFeatures += OnSelectFeatures;
scheme.DeselectFeatures += OnDeselectFeatures;
}
/// <summary>
/// Occurs when setting the symbology to a new scheme and allows removing event handlers
/// </summary>
/// <param name="scheme"></param>
protected virtual void OnExcludeScheme(IFeatureScheme scheme)
{
if (scheme == null) return;
scheme.ItemChanged -= SchemeItemChanged;
scheme.SetParentItem(null);
scheme.SelectFeatures -= OnSelectFeatures;
}