/// <summary>
/// Create relationship if possible. Release mouse afterwards.
/// </summary>
/// <param name="e"></param>
protected override void OnMouseUp(MouseButtonEventArgs e)
{
if (hitItem != null)
{
object targetElement = hitItem.SelectedData;
if (sourceItem != null && hitItem != null && this.diagramDesigner.CreateRelationshipCommand != null)
{
ViewModelRelationshipCreationInfo info = new ViewModelRelationshipCreationInfo(sourceItem.SelectedData, hitItem.SelectedData);
// calcualte source and target points
if (hitItem is FrameworkElement)
{
FrameworkElement sourceFElement = sourceConnector.DiagramItem;
double sourceLeft = Canvas.GetLeft(sourceFElement);
double sourceTop = Canvas.GetTop(sourceFElement);
FrameworkElement targetFElement = hitItem as FrameworkElement;
double targetLeft = Canvas.GetLeft(targetFElement);
double targetTop = Canvas.GetTop(targetFElement);
if (!double.IsNaN(sourceLeft) && !double.IsNaN(sourceTop) &&
!double.IsNaN(targetLeft) && !double.IsNaN(targetTop))
{
Point proposedTarget = e.GetPosition(this.diagramDesigner);
PointD proposedSourcePoint = new PointD(startPoint.X, startPoint.Y);
PointD proposedTargetPoint = new PointD(proposedTarget.X, proposedTarget.Y);
// calculate points
//Point sourcePointT = sourceFElement.TranslatePoint(new Point(0, 0), this.diagramDesigner);
//Point targetPointT = targetFElement.TranslatePoint(new Point(0, 0), this.diagramDesigner);
Point sourcePoint = sourceFElement.TransformToAncestor(this.diagramDesigner).Transform(new Point(0, 0));
Point targetPoint = targetFElement.TransformToAncestor(this.diagramDesigner).Transform(new Point(0, 0));
// calculate side for source
RectangleD sourceBounds = new RectangleD(sourcePoint.X, sourcePoint.Y, sourceFElement.Width, sourceFElement.Height);
info.ProposedSourcePoint = LinkShape.CalculateLocation(sourceBounds, proposedSourcePoint);
// calculate side for target
RectangleD targeteBounds = new RectangleD(targetPoint.X, targetPoint.Y, targetFElement.Width, targetFElement.Height);
info.ProposedTargetPoint = LinkShape.CalculateLocation(targeteBounds, proposedTargetPoint);
}
}
this.diagramDesigner.CreateRelationshipCommand.Execute(info);
}
}
if (this.IsMouseCaptured) this.ReleaseMouseCapture();
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(this.diagramDesigner);
if (adornerLayer != null)
{
adornerLayer.Remove(this);
}
}
/// <summary>
/// Hit testing.
/// </summary>
/// <param name="hitPoint">Location to do a hit test at.</param>
private void HitTesting(Point hitPoint)
{
DependencyObject hitObject = diagramDesigner.InputHitTest(hitPoint) as DependencyObject;
while (hitObject != null )
{
if (hitObject is DiagramDesignerItem)
{
hitItem = hitObject as DiagramDesignerItem;
if (!hitItem.IsDiagramLink)
{
if (sourceItem != null && hitItem != null && this.diagramDesigner.CreateRelationshipCommand != null)
{
object sourceData = sourceItem.SelectedData;
object targetData = hitItem.SelectedData;
if (sourceData != null && targetData != null)
{
ViewModelRelationshipCreationInfo info = new ViewModelRelationshipCreationInfo(sourceData, targetData);
if (info.Source != null && info.Target != null)
if (this.diagramDesigner.CreateRelationshipCommand.CanExecute(info))
{
return;
}
}
}
}
hitItem = null;
return;
}
hitObject = VisualTreeHelper.GetParent(hitObject);
}
hitItem = null;
}