MARKUS

            <StackPanel MouseLeave="StackPanel_MouseLeave" MouseUp="StackPanel_MouseUp" ToolTipService.ToolTip="{Binding Name}">

                                 PreviewMouseWheel ="lstSymbolPrivate_PreviewMouseWheel"

                                 PreviewMouseLeftButtonDown="lstSymbolPrivate_PreviewMouseLeftButtonDown"

                                 >

        ListBox _dragSource = null;

        private void lstSymbolPrivate_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)

        {

            _dragSource = sender as ListBox;

            object item = Symbol.GetDataFromListBox(sender as ListBox, e.GetPosition(sender as ListBox));

            if (item != null)

            {

                string _data = string.Empty;

                using (KCOMEntities Entity = new KCOMEntities(ConnectStringBuilder.KCOMConnectionString().ToString()))

                {

                    string id = (item as Symbol_Custom).ID;

                    if (RadTab.SelectedIndex == 0)

                        _data = Entity.SYMBOL_PRIVATE.Where(data => data.ID == id).FirstOrDefault().DATA;

                    else

                        _data = Entity.SYMBOL_PUBLIC.Where(data => data.ID == id).FirstOrDefault().DATA;

                }

                DragDrop.DoDragDrop(_dragSource, _data, DragDropEffects.Copy);

            }

        }

        /// <summary>

        /// get data from list box where user clicked

        /// </summary>

        /// <author>humkyung</author>

        /// <date>2018.05.30</date>

        /// <param name="source"></param>

        /// <param name="point"></param>

        /// <returns></returns>

        private static object GetDataFromListBox(ListBox source, Point point)

        {

            UIElement element = source.InputHitTest(point) as UIElement;

            if (element != null)

            {

                object data = DependencyProperty.UnsetValue;

                while (data == DependencyProperty.UnsetValue)

                {

                    data = source.ItemContainerGenerator.ItemFromContainer(element);

                    if (data == DependencyProperty.UnsetValue)

                    {

                        element = VisualTreeHelper.GetParent(element) as UIElement;

                    }

                    if (element == source)

                    {

                        return null;

                    }

                }

                if (data != DependencyProperty.UnsetValue)

                {

                    return data;

                }

            }

            return null;

        }

                                                              DragDrop.DragOver="zoomAndPanControl_DragOver"

                                                              DragDrop.DragEnter="zoomAndPanControl_DragEnter"

                                                              DragDrop.DragLeave="zoomAndPanControl_DragLeave"

                                                              Drop="zoomAndPanControl_Drop"

                                                              AllowDrop="True"

using KCOMDataModel.DataModel;

        private void zoomAndPanControl_DragOver(object sender, DragEventArgs e)

        {

            e.Effects = DragDropEffects.Copy;

        }

        private void zoomAndPanControl_DragEnter(object sender, DragEventArgs e)

        {

            e.Effects = DragDropEffects.Copy;

        }

        private void zoomAndPanControl_DragLeave(object sender, DragEventArgs e)

        {

            e.Effects = DragDropEffects.None;

        }

        private void zoomAndPanControl_Drop(object sender, DragEventArgs e)

        {

            if (e.Data.GetDataPresent(typeof(string)))

            {

                this.getCurrentPoint = e.GetPosition(drawingRotateCanvas);

                string dragData = e.Data.GetData(typeof(string)) as string;

                Move_Symbol(sender, dragData);

            }

        }

        private void Move_Symbol(object sender, string dragData)

        {

            if (dragData.Contains("|DZ|"))

            {

                List<MarkupToPDF.Common.CommentUserInfo> adornerSet = new List<MarkupToPDF.Common.CommentUserInfo>();

                string[] delimiterChars = { "|DZ|" };

                string[] data = dragData.Split(delimiterChars, StringSplitOptions.RemoveEmptyEntries);

                this.ParentOfType<MainWindow>().dzMainMenu.ReleaseAdorner();

                Multi_Undo_data multi_Undo_Data = new Multi_Undo_data();

                //강인구 Undo/Redo 보류

                UndoData = new Undo_data()

                {

                    IsUndo = false,

                    Event = Event_Type.Create,

                    EventTime = DateTime.Now,

                    Markup_List = new List<Multi_Undo_data>()

                };

                ViewerDataModel.Instance.UndoDataList.Where(data1 => data1.IsUndo == true).ToList().ForEach(i =>

                {

                    ViewerDataModel.Instance.UndoDataList.Remove(i);

                });

                foreach (string parse in data)

                {

                    if (parse != "")

                    {

                        System.Windows.Controls.Control item = this.layerControl.markupParse_Paste(parse, ViewerDataModel.Instance.MarkupControls_USER);

                        (item as MarkupToPDF.Common.CommentUserInfo).CommentID = Events.Save.shortGuid();

                        ViewerDataModel.Instance.MarkupControls.Remove(item as MarkupToPDF.Common.CommentUserInfo);

                        ViewerDataModel.Instance.MarkupControls_USER.Remove(item as MarkupToPDF.Common.CommentUserInfo);

                        adornerSet.Add(item as MarkupToPDF.Common.CommentUserInfo);

                        multi_Undo_Data = this.ParentOfType<MainWindow>().dzMainMenu.Control_Style(item as MarkupToPDF.Common.CommentUserInfo);

                        UndoData.Markup_List.Add(multi_Undo_Data);

                        ViewerDataModel.Instance.UndoDataList.Add(UndoData);

                    }

                }

                Controls.AdornerFinal final = new Controls.AdornerFinal(adornerSet);

                /// move symbol to current mouse point

                double realPointX = this.getCurrentPoint.X - final.BorderSize.X - (final.BorderSize.Width / 2);

                double realPointY = this.getCurrentPoint.Y - final.BorderSize.Y - (final.BorderSize.Height / 2);

                final.MoveAdorner(new System.Windows.Controls.Primitives.DragDeltaEventArgs(realPointX, realPointY));

                if (final.MemberSet.Where(type => type.Drawingtype == MarkupToPDF.Controls.Common.ControlType.TextControl).FirstOrDefault() != null)

                {

                    final.MoveAdorner(new System.Windows.Controls.Primitives.DragDeltaEventArgs(0.001, 0.001)); //dummy

                }

                /// up to here

                ViewerDataModel.Instance.SystemMain.dzMainMenu.SelectLayer.Children.Add(final);

            }

        }