private void ItemContext_MouseUp(object sender, MouseButtonEventArgs e)
{
if ((e != null && e.ChangedButton != MouseButton.Left) || !onMouseCapture)
{
return;
}
isMousePressed = false;
onMouseCapture = false;
Mouse.Capture(null);
if (!onDragging)
{
SelectedItemSet.SetSelectedItem(pressedItem);
return;
}
if (e != null)
{
Point cursorPos = e.GetPosition(ChildItemScrollViewer);
Point absoluteCursorPos = e.GetPosition(ChildItemStackPanel);
NodeTarget target = GetNodeTarget((float)cursorPos.Y);
MoveSelectedItems(SelectedItemSet, target);
}
RemoveDraggingClone();
SetDraggingState(false);
SetDraggingCursorVisible(false);
}
private NodeTarget GetNodeTarget(float cursorPosY)
{
NodeTarget target = null;
float bottom = (float)ChildItemStackPanel.TranslatePoint(new Point(0f, ChildItemStackPanel.ActualHeight), ChildItemScrollViewer).Y;
//최하단으로 이동
const float ClippingBias = 2f;
if (cursorPosY > bottom - ClippingBias)
{
cursorPosY = (float)bottom - 1f;
target = new NodeTarget(RootFolder, NodeDirection.InnerBottom);
SetDraggingCursorPosition(bottom, 10f);
}
if (target == null)
{
//성능을 위해 탐색하면서 SetDraggingCursorPosition을 같이 호출합니다.
ForeachItemsOptimize((ITreeItem item, ref bool breakFlag) => {
if (item != pressedItem)
{
float top = (float)item.TranslatePoint(new Point(0, 0), ChildItemScrollViewer).Y;
float diff = cursorPosY - top;
float itemHeight = (float)item.ItemContext.ActualHeight;
if (diff > 0f && diff < itemHeight)
{
target = new NodeTarget(item);
if (item is ITreeFolder)
{
//Folder
float sideEventHeight = itemHeight * SideEventRatio;
float centerEventHeight = itemHeight * CenterEventRatio;
if (diff < sideEventHeight)
{
//Top
target.direction = NodeDirection.Top;
SetDraggingCursorPosition(top, sideEventHeight);
}
else if (diff > itemHeight - sideEventHeight)
{
//Bottom
target.direction = NodeDirection.Bottom;
SetDraggingCursorPosition(top + itemHeight - sideEventHeight, sideEventHeight);
}
else
{
//Center
target.direction = NodeDirection.InnerBottom;
SetDraggingCursorPosition(top + sideEventHeight, centerEventHeight);
}
}
else
{
//Item
float sideEventHeight = itemHeight * 0.5f;
if (diff < sideEventHeight)
{
//Top
target.direction = NodeDirection.Top;
SetDraggingCursorPosition(top, sideEventHeight);
}
else
{
//Bottom
target.direction = NodeDirection.Bottom;
SetDraggingCursorPosition(top + sideEventHeight, sideEventHeight);
}
}
breakFlag = true;
}
}
});
}
SetDraggingCursorVisible(target != null);
return(target);
}
private bool MoveSelectedItems(SelectedItemSet selectedItemSet, NodeTarget target)
{
if (target == null)
{
return(false);
}
ITreeFolder[] selectedFolders = selectedItemSet
.Where(item => item is ITreeFolder)
.Select(item => item as ITreeFolder).ToArray();
//자신 내부에 이동시도시 Reject
foreach (ITreeFolder folder in selectedFolders)
{
if (folder == target.node)
{
return(false);
}
if (IsContainsChildRecursive(folder, target.node))
{
MessageOccured?.Invoke("자신의 하위 폴더로 이동할 수 없습니다.");
return(false);
}
}
//정렬
ITreeItem[] sortedSelectedItems = CollectSelectedItems();
//이동
if (target.node is ITreeFolder && target.direction == NodeDirection.Bottom && ((ITreeFolder)target.node).ChildItemCollection.Count > 0)
{
target.direction = NodeDirection.InnerTop;
}
if (target.direction == NodeDirection.Bottom || target.direction == NodeDirection.InnerTop)
{
sortedSelectedItems = sortedSelectedItems.Reverse().ToArray();
}
foreach (ITreeItem item in sortedSelectedItems)
{
ITreeFolder oldParent = item.ParentItem ?? this;
ITreeFolder newParent = null;
int index = -1;
FrameworkElement uiItem = (FrameworkElement)item;
if (oldParent != null)
{
oldParent.ChildItemCollection.Remove(item as UIElement);
}
else if (uiItem.Parent != null)
{
((Panel)uiItem.Parent).Children.Remove(uiItem);
}
if (target.direction == NodeDirection.InnerTop)
{
//폴더 내부로
newParent = target.node as ITreeFolder;
index = 0;
}
else if (target.direction == NodeDirection.InnerBottom)
{
//폴더 내부로
newParent = target.node as ITreeFolder;
index = newParent.ChildItemCollection.Count;
}
else
{
//아이템 위아래로
newParent = target.node.ParentItem ?? this;
index = newParent.ChildItemCollection.IndexOf(target.node as UIElement) +
(target.direction == NodeDirection.Bottom ? 1 : 0);
}
if (AutoApplyItemMove)
{
newParent.ChildItemCollection.Insert(index, item as UIElement);
}
item.ParentItem = newParent;
ItemMoved?.Invoke(item, oldParent, newParent, index);
}
return(true);
}