public virtual void DragCleanup(bool revertExpanded)
{
if (this.m_DropData != null)
{
if (this.m_DropData.expandedArrayBeforeDrag != null && revertExpanded)
{
this.RestoreExpanded(new List <int>(this.m_DropData.expandedArrayBeforeDrag));
}
this.m_DropData = new TreeViewDragging.DropData();
}
}
public virtual bool DragElement(TreeViewItem targetItem, Rect targetItemRect, int row)
{
bool flag = Event.current.type == EventType.DragPerform;
bool result;
TreeViewDragging.DropPosition dropPosition;
if (targetItem == null)
{
if (this.m_DropData != null)
{
this.m_DropData.dropTargetControlID = 0;
this.m_DropData.rowMarkerControlID = 0;
}
DragAndDrop.visualMode = this.DoDrag(null, null, flag, TreeViewDragging.DropPosition.Below);
if (DragAndDrop.visualMode != DragAndDropVisualMode.None && flag)
{
this.FinalizeDragPerformed(true);
}
result = false;
}
else if (!this.TryGetDropPosition(targetItem, targetItemRect, row, out dropPosition))
{
result = false;
}
else
{
TreeViewItem treeViewItem = null;
switch (dropPosition)
{
case TreeViewDragging.DropPosition.Upon:
treeViewItem = targetItem;
break;
case TreeViewDragging.DropPosition.Below:
if (this.m_TreeView.data.IsExpanded(targetItem) && targetItem.hasChildren)
{
treeViewItem = targetItem;
targetItem = targetItem.children[0];
dropPosition = TreeViewDragging.DropPosition.Above;
}
else
{
treeViewItem = targetItem.parent;
}
break;
case TreeViewDragging.DropPosition.Above:
treeViewItem = targetItem.parent;
break;
}
DragAndDropVisualMode dragAndDropVisualMode = DragAndDropVisualMode.None;
if (flag)
{
if (dropPosition == TreeViewDragging.DropPosition.Upon)
{
dragAndDropVisualMode = this.DoDrag(targetItem, targetItem, true, dropPosition);
}
if (dragAndDropVisualMode == DragAndDropVisualMode.None && treeViewItem != null)
{
dragAndDropVisualMode = this.DoDrag(treeViewItem, targetItem, true, dropPosition);
}
if (dragAndDropVisualMode != DragAndDropVisualMode.None)
{
this.FinalizeDragPerformed(false);
}
else
{
this.DragCleanup(true);
this.m_TreeView.NotifyListenersThatDragEnded(null, false);
}
}
else
{
if (this.m_DropData == null)
{
this.m_DropData = new TreeViewDragging.DropData();
}
this.m_DropData.dropTargetControlID = 0;
this.m_DropData.rowMarkerControlID = 0;
int itemControlID = TreeViewController.GetItemControlID(targetItem);
this.HandleAutoExpansion(itemControlID, targetItem, targetItemRect);
if (dropPosition == TreeViewDragging.DropPosition.Upon)
{
dragAndDropVisualMode = this.DoDrag(targetItem, targetItem, false, dropPosition);
}
if (dragAndDropVisualMode != DragAndDropVisualMode.None)
{
this.m_DropData.dropTargetControlID = itemControlID;
DragAndDrop.visualMode = dragAndDropVisualMode;
}
else if (targetItem != null && treeViewItem != null)
{
dragAndDropVisualMode = this.DoDrag(treeViewItem, targetItem, false, dropPosition);
if (dragAndDropVisualMode != DragAndDropVisualMode.None)
{
this.drawRowMarkerAbove = (dropPosition == TreeViewDragging.DropPosition.Above);
this.m_DropData.rowMarkerControlID = itemControlID;
DragAndDrop.visualMode = dragAndDropVisualMode;
}
}
}
Event.current.Use();
result = true;
}
return(result);
}
public virtual bool DragElement(TreeViewItem targetItem, Rect targetItemRect, bool firstItem)
{
bool flag = Event.current.type == EventType.DragPerform;
bool result;
if (targetItem == null)
{
if (this.m_DropData != null)
{
this.m_DropData.dropTargetControlID = 0;
this.m_DropData.rowMarkerControlID = 0;
}
DragAndDrop.visualMode = this.DoDrag(null, null, flag, TreeViewDragging.DropPosition.Below);
if (DragAndDrop.visualMode != DragAndDropVisualMode.None && flag)
{
this.FinalizeDragPerformed(true);
}
result = false;
}
else
{
Vector2 mousePosition = Event.current.mousePosition;
bool flag2 = this.m_TreeView.data.CanBeParent(targetItem);
Rect rect = targetItemRect;
float num = (!flag2) ? (targetItemRect.height * 0.5f) : this.m_TreeView.gui.halfDropBetweenHeight;
if (firstItem)
{
rect.yMin -= num;
}
rect.yMax += num;
if (!rect.Contains(mousePosition))
{
result = false;
}
else
{
TreeViewDragging.DropPosition dropPosition;
if (mousePosition.y >= targetItemRect.yMax - num)
{
dropPosition = TreeViewDragging.DropPosition.Below;
}
else if (firstItem && mousePosition.y <= targetItemRect.yMin + num)
{
dropPosition = TreeViewDragging.DropPosition.Above;
}
else
{
dropPosition = ((!flag2) ? TreeViewDragging.DropPosition.Above : TreeViewDragging.DropPosition.Upon);
}
TreeViewItem treeViewItem = null;
switch (dropPosition)
{
case TreeViewDragging.DropPosition.Upon:
treeViewItem = targetItem;
break;
case TreeViewDragging.DropPosition.Below:
if (this.m_TreeView.data.IsExpanded(targetItem) && targetItem.hasChildren)
{
treeViewItem = targetItem;
targetItem = targetItem.children[0];
dropPosition = TreeViewDragging.DropPosition.Above;
}
else
{
treeViewItem = targetItem.parent;
}
break;
case TreeViewDragging.DropPosition.Above:
treeViewItem = targetItem.parent;
break;
}
DragAndDropVisualMode dragAndDropVisualMode = DragAndDropVisualMode.None;
if (flag)
{
if (dropPosition == TreeViewDragging.DropPosition.Upon)
{
dragAndDropVisualMode = this.DoDrag(targetItem, targetItem, true, dropPosition);
}
if (dragAndDropVisualMode == DragAndDropVisualMode.None && treeViewItem != null)
{
dragAndDropVisualMode = this.DoDrag(treeViewItem, targetItem, true, dropPosition);
}
if (dragAndDropVisualMode != DragAndDropVisualMode.None)
{
this.FinalizeDragPerformed(false);
}
else
{
this.DragCleanup(true);
this.m_TreeView.NotifyListenersThatDragEnded(null, false);
}
}
else
{
if (this.m_DropData == null)
{
this.m_DropData = new TreeViewDragging.DropData();
}
this.m_DropData.dropTargetControlID = 0;
this.m_DropData.rowMarkerControlID = 0;
int itemControlID = TreeViewController.GetItemControlID(targetItem);
this.HandleAutoExpansion(itemControlID, targetItem, targetItemRect, num, mousePosition);
if (dropPosition == TreeViewDragging.DropPosition.Upon)
{
dragAndDropVisualMode = this.DoDrag(targetItem, targetItem, false, dropPosition);
}
if (dragAndDropVisualMode != DragAndDropVisualMode.None)
{
this.m_DropData.dropTargetControlID = itemControlID;
DragAndDrop.visualMode = dragAndDropVisualMode;
}
else if (targetItem != null && treeViewItem != null)
{
dragAndDropVisualMode = this.DoDrag(treeViewItem, targetItem, false, dropPosition);
if (dragAndDropVisualMode != DragAndDropVisualMode.None)
{
this.drawRowMarkerAbove = (dropPosition == TreeViewDragging.DropPosition.Above);
this.m_DropData.rowMarkerControlID = itemControlID;
DragAndDrop.visualMode = dragAndDropVisualMode;
}
}
}
Event.current.Use();
result = true;
}
}
return(result);
}