using GongSolutions.Wpf.DragDrop;
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using GongSolutions.Wpf.DragDrop.Utilities;
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using OpenTap;
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using System.Windows;
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namespace OpenTapEditor.Util
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{
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public class StepTreeDragHandler: DefaultDropHandler
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{
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public bool CanConvert(IDropInfo dropInfo)
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{
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if (!(dropInfo.TargetItem is TestStep target))
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{
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return false;
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}
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if (!(dropInfo.Data is TestStep source))
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{
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return false;
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}
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if (source == target)
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{
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return false;
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}
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var tType = target.GetType();
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var sType = source.GetType();
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if (!dropInfo.InsertPosition.HasFlag(RelativeInsertPosition.TargetItemCenter))
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{
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return true;
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}
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if (!TestStepList.AllowChild(tType, sType))
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{
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return false;
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}
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//if(source.)
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//if (target.sequence != source.sequence)
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//{
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// return false;
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//}
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return true;
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}
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public override void DragOver(IDropInfo dropInfo)
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{
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if (CanConvert(dropInfo))
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{
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dropInfo.Effects = DragDropEffects.Move;
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if (dropInfo.InsertPosition.HasFlag(RelativeInsertPosition.TargetItemCenter))
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{
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dropInfo.DropTargetAdorner = null;
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}
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else
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{
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dropInfo.DropTargetAdorner = DropTargetAdorners.Insert;
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}
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//if (dropInfo.DropTargetAdorner == DropTargetAdorners.Highlight) {
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//}
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//dropInfo.DropTargetAdorner = DropTargetAdorners.Insert;
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dropInfo.DropTargetHintState = DropHintState.Active;
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dropInfo.DropTargetHintAdorner = DropTargetAdorners.Hint;
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}
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else
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{
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dropInfo.Effects = DragDropEffects.None;
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dropInfo.DropTargetHintAdorner = DropTargetAdorners.Hint;
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dropInfo.DropTargetHintState = DropHintState.Error;
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}
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}
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public override void Drop(IDropInfo dropInfo)
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{
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if (dropInfo?.DragInfo == null)
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{
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return;
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}
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if (!CanConvert(dropInfo))
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{
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return;
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}
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ITestStep target = dropInfo.TargetItem as ITestStep;
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var insertIndex = GetInsertIndex(dropInfo);
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var destinationList = dropInfo.TargetCollection.TryGetList();
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var data = ExtractData(dropInfo.Data).OfType<object>().ToList();
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bool isSameCollection = false;
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var copyData = ShouldCopyData(dropInfo);
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if (!copyData)
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{
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var sourceList = dropInfo.DragInfo.SourceCollection.TryGetList();
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if (sourceList != null)
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{
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isSameCollection = sourceList.IsSameObservableCollection(destinationList);
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if (!isSameCollection)
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{
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foreach (var o in data)
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{
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var index = sourceList.IndexOf(o);
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if (index != -1)
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{
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sourceList.RemoveAt(index);
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// If source is destination too fix the insertion index
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if (destinationList != null && ReferenceEquals(sourceList, destinationList) && index < insertIndex)
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{
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--insertIndex;
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}
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}
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}
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}
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}
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}
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if (destinationList != null)
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{
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var objects2Insert = new List<object>();
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// check for cloning
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var cloneData = dropInfo.Effects.HasFlag(DragDropEffects.Copy) || dropInfo.Effects.HasFlag(DragDropEffects.Link);
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foreach (var o in data)
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{
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var obj2Insert = o;
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if (cloneData)
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{
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if (o is ICloneableDragItem cloneableItem)
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{
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obj2Insert = cloneableItem.CloneItem(dropInfo);
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}
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else if (o is ICloneable cloneable)
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{
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obj2Insert = cloneable.Clone();
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}
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}
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objects2Insert.Add(obj2Insert);
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if (!cloneData && isSameCollection)
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{
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var index = destinationList.IndexOf(o);
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if (index != -1)
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{
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if (insertIndex > index)
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{
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insertIndex--;
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}
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Move(destinationList, index, insertIndex++);
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}
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}
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else
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{
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destinationList.Insert(insertIndex++, obj2Insert);
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}
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if (obj2Insert is IDragItemSource dragItemSource)
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{
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dragItemSource.ItemDropped(dropInfo);
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}
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}
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SelectDroppedItems(dropInfo, objects2Insert);
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}
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}
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}
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}
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