/// <summary>
        /// 마우스키를 뗐을 때..
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void wTree_MouseUp(object sender, MouseEventArgs e)
        {
            if (_doubleClicked)
            {
                _doubleClicked = false;
                return;
            }


            Point pt;
            //= new Point(e.X - Margin.Left, e.Y - Margin.Top);
            wTreeNode mouseUpNode = GetNodeFromPoint(e.Location, out pt);// _pressedNode;

            //Point pt;
            //wTreeNode clickedNode = GetNodeFromPoint(e.Location, out pt);// _pressedNode;
            //wTreeNodeItem item = clickedNode.GetItemFromPoint(pt);
            //wTreeNodeItemMouseArgs args = new wTreeNodeItemMouseArgs(e);
            //if (E_TreeNodeDoubleClicked != null) E_TreeNodeDoubleClicked(clickedNode, item, args);

            wTreeNodeItem item = (mouseUpNode == null)? null : mouseUpNode.GetItemFromPoint(pt);

            wTreeNodeItemMouseArgs args = new wTreeNodeItemMouseArgs(new MouseEventArgs(e.Button, e.Clicks, pt.X, pt.Y, e.Delta));


            if (E_TreeNodeMouseUp != null)
            {
                E_TreeNodeMouseUp(mouseUpNode, mouseUpNode.GetItemFromPoint(pt), args);
            }
            if (args.IsCanceled)
            {
                return;
            }

            SelectionHandler.FixSelections();

            if (_pressedNode != null && mouseUpNode != null)
            {
                bool isDragging;
                if (_pressedNode != mouseUpNode)
                {
                    isDragging = true;
                }
                else
                {
                    isDragging = false;
                }
                if (EditorHandler.ActivatedEditor != null && EditorHandler.ActivatedEditor.ItemToEdit != item)
                {
                    EditorHandler.HideEditor();
                }

                if (e.Button == System.Windows.Forms.MouseButtons.Left)
                {
                    if ((ModifierKeys & Keys.Control) == Keys.Control)
                    {
                        if (isDragging)//selection
                        {
                        }
                        else //제자리 클릭..
                        {
                        }
                    }
                    else if ((ModifierKeys & Keys.Shift) == Keys.Shift)
                    {
                    }
                    else
                    {
                    }
                }
                if (item != null && isDragging == false)                    //item clicked or right clicked
                {
                    if (e.Button == System.Windows.Forms.MouseButtons.Left) //item clicked
                    {
                        if (Control.ModifierKeys == Keys.None)
                        {//click
                        }
                        else if ((Control.ModifierKeys & Keys.Control) == Keys.Control)
                        {
                        }
                        else if ((Control.ModifierKeys & Keys.Shift) == Keys.Shift)
                        {
                        }
                        else if ((Control.ModifierKeys & Keys.Alt) == Keys.Alt)
                        {
                        }
                    }
                }
            }

            _pressedNode = null;
            SelectionHandler.ReleaseTempSelection();

            _lastMouseUpNode = mouseUpNode;
            _lastMouseUpItem = item;
            DrawHandler.ReDrawTree(false);
            //SetNodeSelected(selectedNode, pt);
            //this.Focus();
        }