| OnPreviewDragEnter(DragEventArgs) | Invoked when an unhandled PreviewDragEnter attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event. |
| OnPreviewDragEnter(DragEventArgs) | Handle preview drag event in order to override the serialized data. By default WPF will not serialize embedded elements unless they are images (see [1]), so all our emojis get replaced with " ". To avoid this problem we get rid of the XAML and RTF serialisations and replace the dragged text with the current selection. [1] https://referencesource.microsoft.com/#PresentationFramework/src/Framework/System/windows/Documents/TextRangeSerialization.cs,1180 |