private void AssociatedObject_Drop(object sender, DragEventArgs e)
{
//if the data type can be dropped
if (e.Data.GetDataPresent(typeof(DraggingAdorner)))
{
UIElement element = sender as FrameworkElement;
ICommand dropcommand = GetDropCommand(element);
if (dropcommand != null)
{
object parameter = GetDropCommandParameter(element);
//if (this.AssociatedObject.DataContext is IDragged)
//{
// (this.AssociatedObject.DataContext as IDragged).DraggedDataContext = (e.Data.GetDataPresent(DataFormats.Serializable) ? e.Data.GetData(DataFormats.Serializable) : null);
//}
SetDraggedDataContext(this.AssociatedObject, (e.Data.GetDataPresent(DataFormats.Serializable) ? e.Data.GetData(DataFormats.Serializable) : null));
if (dropcommand.CanExecute(parameter))
{
Point point = e.GetPosition(element);
//it is will be to DroopedCanvas is not exist
Canvas droppedcanvas = GetDroppedCanvas(element);
UIElement dragelement = e.Data.GetDataPresent(typeof(UIElement)) ? e.Data.GetData(typeof(UIElement)) as UIElement : null;
Type droppedcontroltype = dragelement != null?GetDroppedControlType(dragelement) : null;
if (droppedcontroltype != null && !WPFUtility.IsCorrectType(droppedcontroltype, typeof(ContentControl)))
{
throw new ArgumentException("DroppedControlType is base on ContentControl.");
}
if (e.Data.GetDataPresent(typeof(DraggingAdorner)))
{
var adn = e.Data.GetData(typeof(DraggingAdorner)) as DraggingAdorner;
UIElement clnele = null;
bool iscopy = false;
if (droppedcontroltype != null)
{
//TODO: Copy Control or create new control
if (GetIsDuplication(dragelement))
{
clnele = CreateNewContentControl(droppedcontroltype, adn.GetGhostElement() as UIElement);
}
else
{
clnele = Activator.CreateInstance(droppedcontroltype) as UIElement;
}
iscopy = true;
}
else
{
clnele = dragelement;
}
//add the clone element
if (clnele != null)
{
Point canvaspoint = (Point)(point - adn.CenterPoint);
Point oldpoint = new Point(Canvas.GetLeft(dragelement), Canvas.GetTop(dragelement));
SetConnectionLinePosition(clnele as ConnectionDiagramBase, (Point)(canvaspoint - oldpoint));
Canvas.SetLeft(clnele, canvaspoint.X);
Canvas.SetTop(clnele, canvaspoint.Y);
var duuid = $"{clnele.GetType().Name}_{Guid.NewGuid().ToString()}";
if (clnele is ConnectionDiagramBase)
{
(clnele as ConnectionDiagramBase).DiagramUUID = duuid;
}
else
{
FrameworkElementAssist.SetDiagramUUID(clnele, duuid);
}
if (iscopy)
{
if (droppedcanvas != null)
{
droppedcanvas.Children.Add(clnele);
}
}
else
{
//???
}
if (parameter != null)
{
dropcommand.Execute(parameter);
}
else
{
dropcommand.Execute((clnele as ContentControl)?.DataContext);
}
}
}
// }
}
SetDraggedDataContext(this.AssociatedObject, null);
//if (this.AssociatedObject.DataContext is IDragged)
//{
// (this.AssociatedObject.DataContext as IDragged).DraggedDataContext = null;
//}
}
}
if (this._adorner != null)
{
this._adorner.Remove();
}
e.Handled = true;
return;
}
private void AssociatedObject_Drop(object sender, DragEventArgs e)
{
if (_dataType != null)
{
//if the data type can be dropped
if (e.Data.GetDataPresent(_dataType))
{
FrameworkElement element = sender as FrameworkElement;
ICommand dropcommand = GetDropLineCommand(element);
if (dropcommand != null)
{
object parameter = GetDropLineCommandParameter(element);
Point point = e.GetPosition(element);
var adn = e.Data.GetData(_dataType) as DrawLineAdorner;
Point adnPoint = adn.Position;
Canvas droppedcanvas = GetDroppedLineCanvas(element);
var originelement = (e.Data.GetData(typeof(UIElement)) as FrameworkElement);
//the object for ConnectionDiagram
ConnectionDiagramBase origindiagram = originelement as ConnectionDiagramBase;
ConnectionDiagramBase terminaldiagram = element as ConnectionDiagramBase;
SetDraggedDataContext(this.AssociatedObject, e.Data.GetData(DataFormats.Serializable));
if (droppedcanvas != null)
{
double x1, y1, x2, y2 = 0.0;
if (ConnectorPositionType.Custom.Equals(origindiagram?.ConnectorPositionType))
{
//the Ghost line position
x1 = adn.GetLineStartEndPosition().Item1;
y1 = adn.GetLineStartEndPosition().Item2;
}
else
{
x1 = WPFUtility.GetCenterPosition(originelement, droppedcanvas).X;
y1 = WPFUtility.GetCenterPosition(originelement, droppedcanvas).Y;
}
if (ConnectorPositionType.Custom.Equals(terminaldiagram?.ConnectorPositionType))
{
//the Ghost line position
x2 = adn.GetLineStartEndPosition().Item3;
y2 = adn.GetLineStartEndPosition().Item4;
}
else
{
x2 = WPFUtility.GetCenterPosition(element, droppedcanvas).X;
y2 = WPFUtility.GetCenterPosition(element, droppedcanvas).Y;
}
//the line type of custom
Type linetype = GetDropLineControlType(element);
if (!WPFUtility.IsCorrectType(linetype, typeof(ConnectionLineBase)))
{
throw new ArgumentException($"DropLineControlType is base on {nameof(ConnectionLineBase)}.");
}
dynamic conline;
if (!typeof(DrawLineThump).Equals(linetype))
{
conline = Activator.CreateInstance(linetype);
if (conline is ConnectionLineBase)
{
//if inherit from ILinePosition
if (conline is ILinePosition)
{
(conline as ILinePosition).X1 = x1;
(conline as ILinePosition).Y1 = y1;
(conline as ILinePosition).X2 = x2;
(conline as ILinePosition).Y2 = y2;
}
}
}
else
{
conline = new Line()
{
X1 = x1,
Y1 = y1,
X2 = x2,
Y2 = y2,
};
}
FrameworkElementAssist.SetOriginDiagram(conline, originelement);
FrameworkElementAssist.SetTerminalDiagram(conline, element);
//set the parameter
//var dropparam = parameter ?? conline.DataContext;
string lineuuid = $"{conline.GetType().Name}_{Guid.NewGuid().ToString()}";
if (dropcommand.CanExecute(parameter))
{
Canvas.SetTop(conline, 0);
Canvas.SetLeft(conline, 0);
//add the relation of the diagram
if (origindiagram != null)
{
origindiagram.DepartureLines.Add(conline);
}
if (terminaldiagram != null)
{
terminaldiagram.ArrivalLines.Add(conline);
}
//TODO:FrameworkElement????
if (droppedcanvas != null)
{
droppedcanvas.Children.Add(conline);
}
//Set the Dropping Line DataContext
SetDroppingDataContext(this.AssociatedObject, conline.DataContext);
dropcommand.Execute(parameter);
if (conline is ConnectionLineBase)
{
(conline as ConnectionLineBase).LineUUID = lineuuid;
}
else if (conline is Line)
{
FrameworkElementAssist.SetLineUUID(conline, lineuuid);
}
}
}
else
{
dropcommand.Execute(parameter);
}
}
}
}
if (this._adorner != null)
{
this._adorner.Remove();
}
e.Handled = true;
return;
}
