private ConnectionDiagramBase GetSenderDiagram(object sender)
{
ConnectionDiagramBase element = null;
if (!(sender is ConnectionDiagramBase))
{
element = WPFUtility.FindVisualParent <ConnectionDiagramBase>(sender as UIElement);
}
else
{
element = sender as ConnectionDiagramBase;
}
return(element);
}
internal static DiagramLayout CreateDiagramLayout(ConnectionDiagramBase diagram, int index = 0)
{
if (diagram == null)
{
return(null);
}
return(new DiagramLayout()
{
TypeName = diagram.GetType().FullName,
Top = (double)diagram.GetValue(Canvas.TopProperty),
Left = (double)diagram.GetValue(Canvas.LeftProperty),
PositionType = diagram.ConnectorPositionType,
DataContext = diagram.DataContext,
Index = index,
});
}
internal static void SetConnectionLinePosition(ConnectionDiagramBase element, Point point)
{
if (element == null)
{
return;
}
if (element.DepartureLines != null && element.DepartureLines.Any())
{
foreach (var dline in element.DepartureLines)
{
if (dline is ILinePosition)
{
(dline as ILinePosition).X1 = (dline as ILinePosition).X1 + point.X;
(dline as ILinePosition).Y1 = (dline as ILinePosition).Y1 + point.Y;
var angle = Math.Atan2(
(dline as ILinePosition).Y1 - (dline as ILinePosition).Y2,
(dline as ILinePosition).X1 - (dline as ILinePosition).X2) * 180d / Math.PI;
(dline as ILinePosition).Angle = angle < 0 ? angle + 360 : angle;
}
}
}
if (element.ArrivalLines != null && element.ArrivalLines.Any())
{
foreach (var aline in element.ArrivalLines)
{
if (aline is ILinePosition)
{
(aline as ILinePosition).X2 = (aline as ILinePosition).X2 + point.X;
(aline as ILinePosition).Y2 = (aline as ILinePosition).Y2 + point.Y;
var angle = Math.Atan2(
(aline as ILinePosition).Y1 - (aline as ILinePosition).Y2,
(aline as ILinePosition).X1 - (aline as ILinePosition).X2) * 180d / Math.PI;
(aline as ILinePosition).Angle = angle < 0 ? angle + 360 : angle;
}
}
}
}
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;
}
