private static void OnDrop(object _sender, DragEventArgs _dragEventArgs)
{
if (!(_sender is DependencyObject d))
{
return;
}
object target = d.GetValue(FileDragDropTargetProperty);
IDragDropTarget fileTarget = target as IDragDropTarget;
if (fileTarget != null)
{
if (_dragEventArgs.Data.GetDataPresent(DataFormats.FileDrop))
{
fileTarget.OnFileDrop((string[])_dragEventArgs.Data.GetData(DataFormats.FileDrop));
}
else if (_dragEventArgs.Data.GetDataPresent(DataFormats.Text))
{
fileTarget.OnTextDrop((string)_dragEventArgs.Data.GetData(DataFormats.Text));
}
}
else
{
throw new Exception("FileDragDropTarget object must be of type IFileDragDropTarget");
}
}
private static void TargetChanged(object sender, DependencyPropertyChangedEventArgs e)
{
DependencyObject Element = sender as DependencyObject;
IDragDropTarget NewTarget = e.NewValue as IDragDropTarget;
IDragDropTarget CurrentTarget = e.OldValue as IDragDropTarget;
if (Element is UIElement || Element is ContentElement)
{
if (CurrentTarget != null)
{
DragDropTargetAdapter Adapter;
DragDrop.dragDropTargets.TryGetValue(Element, out Adapter).DbC_Assure(isSuccess => isSuccess);
DragDrop.dragDropTargets.Remove(Element);
Adapter?.Dispose();
}
if (NewTarget != null)
{
DragDropTargetAdapter Adapter = DragDropTargetAdapter.Create(NewTarget, Element, true);
DragDrop.dragDropTargets.Add(Element, Adapter);
}
}
else
{
throw new InvalidOperationException("Drag and Drop target can only be registered on UIElements and ContentElements");
}
}
//private readonly Popup popup = new Popup();
//private Point dragLocation;
private DragDropTargetAdapter(IDragDropTarget targetHandler, DependencyObject target, bool makeDroppable)
{
this.targetHandler = targetHandler;
this.target = target;
this.dragTargetHandler = DragDrop.GetDragDropUITargetHandler(target.GetType()).Create(target, this, makeDroppable);
System.Windows.DragDrop.AddDragEnterHandler(this.target, this.DragEnter);
System.Windows.DragDrop.AddDragLeaveHandler(this.target, this.DragLeave);
System.Windows.DragDrop.AddDragOverHandler(this.target, this.DragOver);
System.Windows.DragDrop.AddDropHandler(this.target, this.Drop);
/*
* this.popup.AllowsTransparency = true;
* ContentControl Content = new ContentControl();
* Content.SetBinding(ContentControl.ContentProperty, "");
* Border Border = new Border();
* Border.BorderThickness = new Thickness(1);
* Border.CornerRadius = new CornerRadius(3);
* Border.BorderBrush = new SolidColorBrush(SystemColors.HighlightColor) { Opacity = 0.7 };
* Border.Background = new SolidColorBrush(SystemColors.HighlightColor) {Opacity = 0.3};
* Border.Child = Content;
* Border.MinHeight = 10;
* Border.MinWidth = 10;
* this.popup.Child = Border;
* this.popup.Placement = PlacementMode.Custom;
* this.popup.CustomPopupPlacementCallback = this.HandlePopupPlacement;
* this.popup.HorizontalOffset = 10;
* this.popup.VerticalOffset = 10;*/
}
private static void OnDrop(object _sender, DragEventArgs _dragEventArgs)
{
DependencyObject d = _sender as DependencyObject;
if (d == null)
{
return;
}
Object target = d.GetValue(DragDropTargetProperty);
IDragDropTarget dropTarget = target as IDragDropTarget;
if (dropTarget != null)
{
if (_dragEventArgs.Data.GetDataPresent(DataFormats.Html))
{
dropTarget.OnHtmlDrop((object)_dragEventArgs.Data.GetData(DataFormats.Html));
}
else if (_dragEventArgs.Data.GetDataPresent(DataFormats.FileDrop))
{
dropTarget.OnFileDrop((string[])_dragEventArgs.Data.GetData(DataFormats.FileDrop));
}
}
else
{
throw new Exception("DragDropTarget object must be of type IDragDropTarget");
}
}
private static void OnDragOver(object sender, DragEventArgs e)
{
if (!(sender is DependencyObject d))
{
return;
}
object target = d.GetValue(FileDragDropTargetProperty);
IDragDropTarget fileTarget = target as IDragDropTarget;
if (fileTarget != null)
{
if (e.Data.GetDataPresent(DataFormats.FileDrop))
{
var filenames = ((string[])e.Data.GetData(DataFormats.FileDrop));
foreach (var filename in filenames)
{
string c = Path.GetExtension(filename);
if (c == ".xls" || c == ".xlsm" || c == ".xlsx")
{
e.Effects = DragDropEffects.Move;
}
else
{
e.Effects = DragDropEffects.None;
break;
}
}
e.Handled = true;
}
}
}
static bool TryGetAsDragDropTarget <T>(
object obj,
[MaybeNullWhen(false)] out IDragDropTarget <T> target)
{
if (obj is ISourceList <T> sourceList)
{
target = new SourceListDragDropTarget <T>(sourceList);
return(true);
}
if (obj is ISourceListUiFunnel <T> funnel)
{
target = new SourceListDragDropTarget <T>(funnel.SourceList);
return(true);
}
if (obj is IDerivativeSelectedCollection <T> derivative)
{
target = new DerivativeListDragDropTarget <T>(derivative);
return(true);
}
if (obj is IList <T> l)
{
target = new ListDragDropTarget <T>(l);
return(true);
}
target = default;
return(false);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="source"></param>
/// <param name="dimensions"></param>
/// <param name="dropZoneOffsets"></param>
protected DropZoneBase(IDragDropTarget source, Rect dimensions, Thickness dropZoneOffsets)
{
Source = source;
TargetDimensions = dimensions;
DropZoneOffsets = dropZoneOffsets;
HotSpot = _defaultHotSpot;
Canvas.SetLeft(HotSpot, dimensions.Left);
Canvas.SetTop(HotSpot, dimensions.Top);
HotSpot.Width = dimensions.Width;
HotSpot.Height = dimensions.Height;
DropZoneUI = HotSpot;
}
/// <summary>
/// Unregisters a IDragDropTarget from the manager
/// </summary>
/// <param name="dragDropTarget"></param>
public void UnRegisterDragDropTarget(IDragDropTarget dragDropTarget)
{
if (dragDropTarget == null) throw new ArgumentNullException("dragDropTarget");
if (_targets.Contains(dragDropTarget))
_targets.Remove(dragDropTarget);
}
/// <summary>
/// Registers a IDragDropTarget to the manager
/// </summary>
/// <param name="dragDropTarget"></param>
public void RegisterDragDropTarget(IDragDropTarget dragDropTarget)
{
if (dragDropTarget == null) throw new ArgumentNullException("dragDropTarget");
_targets.Add(dragDropTarget);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="source"></param>
/// <param name="dimensions"></param>
/// <param name="dropZoneOffsets"></param>
public DefaultDropZone(IDragDropTarget source, Rect dimensions, Thickness dropZoneOffsets)
: base(source, dimensions, dropZoneOffsets)
{
((Grid)HotSpot).Background = new SolidColorBrush(Colors.Transparent);
}
///<summary>
/// Registers a drag and drop target handler for a given UI element
///</summary>
public static void SetTarget(DependencyObject element, IDragDropTarget target)
{
element.SetValue(DragDrop.TargetProperty, target);
}
public EdgeDockingDropZone(InsertType insertType, IDragDropTarget source, Rect dimensions, Thickness dropZoneOffsets)
: base(source, dimensions, dropZoneOffsets)
{
_insertType = insertType;
InitUIProperties();
}
public InsertingDropZone(IDragDropTarget source, Rect dimensions, bool isHorizontal, Thickness dropZoneOffsets)
: base(source, dimensions, dropZoneOffsets)
{
_isHorizontal = isHorizontal;
InitUIProperties();
}
public static DragDropTargetAdapter Create(IDragDropTarget dragDropTarget, DependencyObject dependencyObject, bool makeDroppable)
{
return(new DragDropTargetAdapter(dragDropTarget, dependencyObject, makeDroppable));
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="source"></param>
/// <param name="dimensions"></param>
/// <param name="dropZoneOffsets"></param>
public HighlightingDropZone(IDragDropTarget source, Rect dimensions, Thickness dropZoneOffsets)
: base(source, dimensions, dropZoneOffsets)
{
Init();
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="source"></param>
/// <param name="dimensions"></param>
/// <param name="dropZoneOffsets"></param>
/// <param name="highlightBrush"></param>
public HighlightingDropZone(IDragDropTarget source, Rect dimensions, Thickness dropZoneOffsets, Brush highlightBrush)
: base(source, dimensions, dropZoneOffsets)
{
_targetVisual.BorderBrush = highlightBrush;
Init();
}
protected const byte TargetVisualTransparancy = 125; // lower is more transparent
#endregion Fields
#region Constructors
protected LUCADropZoneBase(IDragDropTarget source, Rect dimensions, Thickness dropZoneOffsets)
: base(source, dimensions, dropZoneOffsets)
{
}
