Exemple #1
0
        static void DropTarget_PreviewDragOver(object sender, DragEventArgs e)
        {
            DropInfo dropInfo = new DropInfo(sender, e, m_DragInfo, m_Format.Name);
            IDropTarget dropHandler = GetDropHandler((UIElement)sender);

            if (dropHandler != null)
            {
                dropHandler.DragOver(dropInfo);
            }
            else
            {
                DefaultDropHandler.DragOver(dropInfo);
            }

            // Update the drag adorner.
            if (dropInfo.Effects != DragDropEffects.None)
            {
                if (DragAdorner == null && m_DragInfo != null)
                {
                    CreateDragAdorner();
                }

                if (DragAdorner != null)
                {
                    DragAdorner.MousePosition = e.GetPosition(DragAdorner.AdornedElement);
                    DragAdorner.InvalidateVisual();
                }
            }
            else
            {
                DragAdorner = null;
            }

            // If the target is an ItemsControl then update the drop target adorner.
            if (sender is ItemsControl)
            {
                UIElement adornedElement = ((ItemsControl)sender).GetVisualDescendent<ItemsPresenter>();

                if (dropInfo.DropTargetAdorner == null)
                {
                    DropTargetAdorner = null;
                }
                else if (!dropInfo.DropTargetAdorner.IsInstanceOfType(DropTargetAdorner))
                {
                    DropTargetAdorner = DropTargetAdorner.Create(dropInfo.DropTargetAdorner, adornedElement);
                }

                if (DropTargetAdorner != null)
                {
                    DropTargetAdorner.DropInfo = dropInfo;
                    DropTargetAdorner.InvalidateVisual();
                }
            }

            e.Effects = dropInfo.Effects;
            e.Handled = true;

            Scroll((DependencyObject)sender, e);
        }
Exemple #2
0
        static void DropTarget_PreviewDrop(object sender, DragEventArgs e)
        {
            DropInfo dropInfo = new DropInfo(sender, e, m_DragInfo, m_Format.Name);
            IDropTarget dropHandler = GetDropHandler((UIElement)sender);

            DragAdorner = null;
            DropTargetAdorner = null;

            if (dropHandler != null)
            {
                dropHandler.Drop(dropInfo);
            }
            else
            {
                DefaultDropHandler.Drop(dropInfo);
            }

            e.Handled = true;
        }
Exemple #3
0
 static void DropTarget_PreviewDragLeave(object sender, DragEventArgs e)
 {
     DragAdorner = null;
     DropTargetAdorner = null;
 }