void IDropTarget.Drop(IDropInfo dropInfo)
{
var sourceItem = (SearchCriteria)dropInfo.Data;
var targetItem = (SearchCriteria)dropInfo.TargetItem;
var ii = dropInfo.InsertIndex;
var ip = dropInfo.InsertPosition;
// Change source item's group
sourceItem.Group = targetItem.Group;
// Try to figure out the other item to insert between, or pick a boundary
var options = ListSearches
.Where(sc => sc != sourceItem)
.Where(sc => sc.Group == targetItem.Group)
.OrderBy(sc => sc.Order)
.ToArray();
// Make no changes if it was dropped on itself
if (options.Length == 0)
{
return;
}
var above = options.Where(sc => sc.Order < targetItem.Order).OrderByDescending(sc => sc.Order).FirstOrDefault();
var below = options.Where(sc => sc.Order > targetItem.Order).OrderBy(sc => sc.Order).FirstOrDefault();
var aboveOrder = (above == null) ? options.Min(sc => sc.Order) - 1 : above.Order;
var belowOrder = (below == null) ? options.Max(sc => sc.Order) + 1 : below.Order;
// Update the order to be mid-way between either above or below, based on drag insert position
sourceItem.Order = (targetItem.Order + (ip.HasFlag(RelativeInsertPosition.AfterTargetItem) ? belowOrder : aboveOrder)) / 2;
// Renumber the results
var orderedSearches = ListSearches
.OrderBy(sc => sc.Group)
.ThenBy(sc => sc.Order)
.ToArray();
for (var i = 0; i < orderedSearches.Length; i++)
{
orderedSearches[i].Order = i;
}
// Force binding update
CollectionViewSource.GetDefaultView(searchesList.ItemsSource).Refresh();
// Save list
MarkSearchesChanged();
}
void IDropTarget.Drop(IDropInfo dropInfo)
{
var sourceItem = (SearchCriteria)dropInfo.Data;
var targetItem = (SearchCriteria)dropInfo.TargetItem;
var ii = dropInfo.InsertIndex;
var ip = dropInfo.InsertPosition;
// Change source item's group
sourceItem.Group = targetItem.Group;
// Try to figure out the other item to insert between, or pick a boundary
var options = ListSearches
.OrderBy(sc => sc.Group).ThenBy(sc => sc.Order).ThenBy(sc => sc.Species).ThenBy(sc => sc.MinLevel).ThenBy(sc => sc.MaxLevel)
.Where(sc => (ip == RelativeInsertPosition.BeforeTargetItem) ? sc.Order <targetItem.Order : sc.Order> targetItem.Order).ToArray();
double bound;
if (options.Length > 0)
{
var otherItem = (ip == RelativeInsertPosition.BeforeTargetItem) ? options.Last() : options.First();
bound = otherItem.Order;
}
else
{
bound = targetItem.Order + ((ip == RelativeInsertPosition.BeforeTargetItem) ? -100 : 100);
}
// Update the order to be mid-way between the two
sourceItem.Order = (targetItem.Order + bound) / 2;
// Force binding update
CollectionViewSource.GetDefaultView(searchesList.ItemsSource).Refresh();
// Save list
MarkSearchesChanged();
}