public GalleryCategories(IRibbonControl ribbonControl, IUICollection fromGallery)
{
if (ribbonControl == null)
{
throw new ArgumentNullException(nameof(ribbonControl));
}
_ribbonControl = ribbonControl;
if (fromGallery == null)
{
throw new ArgumentException(ribbonControl.ToString() + " not initialized");
}
_collectionChanged = new UICollectionChangedEvent();
_collectionChanged.ChangedEvent += CollectionChanged_ChangedEvent;
_collectionChanged.Attach(fromGallery);
uint count;
object item;
fromGallery.GetCount(out count);
for (uint i = 0; i < count; i++)
{
fromGallery.GetItem(i, out item);
GalleryItemPropertySet galleryItem = GetItemPropertySet(item);
_controlItems.Add(galleryItem);
}
}
private void CollectionChanged_ChangedEvent(object sender, UICollectionChangedEventArgs e)
{
GalleryItemPropertySet newGalleryItem = GetItemPropertySet(e.NewItem);
//GalleryItemPropertySet oldGalleryItem = GetItemPropertySet(e.OldItem);
switch (e.Action)
{
case CollectionChange.Insert:
_controlItems.Insert((int)e.NewIndex, newGalleryItem);
break;
case CollectionChange.Remove:
_controlItems.RemoveAt((int)e.OldIndex);
break;
case CollectionChange.Replace:
_controlItems[(int)e.NewIndex] = newGalleryItem;
break;
case CollectionChange.Reset:
_controlItems.Clear();
break;
default:
break;
}
}
