// Methods
public PlaceholderAwareEnumerator(CollectionView collectionView, IEnumerator baseEnumerator, NewItemPlaceholderPosition placeholderPosition, object newItem)
{
this._collectionView = collectionView;
this._timestamp = collectionView.Timestamp;
this._baseEnumerator = baseEnumerator;
this._placeholderPosition = placeholderPosition;
this._newItem = newItem;
}
private async Task ProcessSelectedOrdersShift(IDropInfo dropInfo, List <ProductionOrder> draggedItems, string selectedESR)
{
int insertIndex = (dropInfo.InsertIndex != dropInfo.UnfilteredInsertIndex) ? dropInfo.UnfilteredInsertIndex : dropInfo.InsertIndex;
if (dropInfo.VisualTarget is ItemsControl itemsControl)
{
IEditableCollectionView editableItems = itemsControl.Items;
if (editableItems != null)
{
NewItemPlaceholderPosition newItemPlaceholderPosition = editableItems.NewItemPlaceholderPosition;
if (newItemPlaceholderPosition == NewItemPlaceholderPosition.AtBeginning && insertIndex == 0)
{
insertIndex++;
}
else if (newItemPlaceholderPosition == NewItemPlaceholderPosition.AtEnd && insertIndex == itemsControl.Items.Count)
{
insertIndex--;
}
}
// Hack to guarantee we don't insert after the Target Item position
if (dropInfo.InsertPosition == RelativeInsertPosition.AfterTargetItem || dropInfo.InsertPosition.Equals(RelativeInsertPosition.AfterTargetItem | RelativeInsertPosition.TargetItemCenter))
{
insertIndex = insertIndex - 1;
}
ProductionOrder targetLocationOrder = PlannedItems[insertIndex];
// Block Swaps that are not allowed
bool allowed = await CheckIfSwapIsAllowed(selectedESR, targetLocationOrder);
if (!allowed)
{
return;
}
// Removing the "Planner" Groupings
UnsetCollectionGroupings(PlannedItems);
// Removal of the Selected Rows
foreach (ProductionOrder selectedItem in draggedItems)
{
int oldIndex = PlannedItems.IndexOf(selectedItem);
PlannedItems.RemoveAt(oldIndex);
if (oldIndex < insertIndex)
{
insertIndex--;
}
}
// Insertion of the Selected Rows in the new positions
foreach (ProductionOrder selectedItem in draggedItems)
{
// Update the dragged ProductionOrder to the new ESR before Insertion
selectedItem.PlantID = targetLocationOrder.PlantID;
selectedItem.Plant = targetLocationOrder.Plant;
PlannedItems.Insert(insertIndex++, selectedItem);
}
// Updating the "Planner"
SetCollectionGrouping(PlannedItems, "Plant.Name");
ResetPlannerSelectionState();
PlannedItems.SortCollectionBy(m => m.Plant.Name);
RaisePropertyChanged("PlannedItems");
}
}
