private void Configure()
{
_categories = new PolygonCategoryCollection();
OnIncludeCategories(_categories);
PolygonCategory def = new();
_categories.Add(def);
}
/// <summary>
/// Handle the event wiring and scheme update for the new categories.
/// </summary>
/// <param name="categories">The category collection to update</param>
protected virtual void OnIncludeCategories(PolygonCategoryCollection categories)
{
if (categories == null)
{
return;
}
categories.Scheme = this;
categories.SelectFeatures += OnSelectFeatures;
categories.DeselectFeatures += OnDeselectFeatures;
categories.ItemChanged += CategoriesItemChanged;
}
/// <summary>
/// Overrides the copy behavior to remove the now unnecessary SelecTFeatures event handler.
/// </summary>
/// <param name="copy"></param>
protected override void OnCopy(CopyList <IPolygonCategory> copy)
{
PolygonCategoryCollection pcc = copy as PolygonCategoryCollection;
if (pcc != null && pcc.SelectFeatures != null)
{
foreach (var handler in pcc.SelectFeatures.GetInvocationList())
{
pcc.SelectFeatures -= (EventHandler <ExpressionEventArgs>)handler;
}
}
base.OnCopy(copy);
}
