/// <summary>
/// ChangeRule: typeof(ORMBaseBinaryLinkShape), FireTime=TopLevelCommit, Priority=DiagramFixupConstants.AutoLayoutShapesRulePriority;
/// Keep relative child elements a fixed distance away from the fact
/// when the shape changes.
/// </summary>
private static void LinkChangeRule(ElementPropertyChangedEventArgs e)
{
Guid attributeId = e.DomainProperty.Id;
if (attributeId == ORMBaseBinaryLinkShape.EdgePointsDomainPropertyId)
{
ORMBaseBinaryLinkShape parentShape = e.ModelElement as ORMBaseBinaryLinkShape;
LinkedElementCollection <ShapeElement> childShapes = parentShape.RelativeChildShapes;
int childCount = childShapes.Count;
for (int i = 0; i < childCount; ++i)
{
LinkConnectorShape linkConnector = childShapes[i] as LinkConnectorShape;
if (linkConnector != null)
{
RectangleD bounds = parentShape.AbsoluteBoundingBox;
linkConnector.Location = new PointD(bounds.Width / 2, bounds.Height / 2);
ReadOnlyCollection <LinkConnectsToNode> links = DomainRoleInfo.GetElementLinks <LinkConnectsToNode>(linkConnector, LinkConnectsToNode.NodesDomainRoleId);
int linksCount = links.Count;
for (int j = 0; j < linksCount; ++j)
{
LinkConnectsToNode link = links[j];
BinaryLinkShape linkShape = link.Link as BinaryLinkShape;
if (linkShape != null)
{
// Changing the location is not reliably reconnecting all shapes, especially
// during load. Force the link to reconnect with a RecalculateRoute call
linkShape.RecalculateRoute();
}
}
break;
}
}
}
}
/// <summary>
/// ORM diagrams need to connect links to other links, but this is
/// not supported directly by the framework, so we create a dummy
/// node shape that tracks the center of the link line and connect
/// to the shape instead. The currently ORM diagram requirements
/// are simple: we are only called with an opposite ExternalConstraintShape,
/// and we can return the same shape for all requests.
/// Implements <see cref="IProvideConnectorShape.GetUniqueConnectorShape"/>
/// </summary>
protected NodeShape GetUniqueConnectorShape(ShapeElement oppositeShape, ModelElement ignoreLinkShapesFor)
{
LinkConnectorShape retVal = null;
LinkedElementCollection <ShapeElement> childShapes = RelativeChildShapes;
foreach (ShapeElement shape in childShapes)
{
retVal = shape as LinkConnectorShape;
if (retVal != null)
{
return(retVal);
}
}
retVal = new LinkConnectorShape(Partition);
RectangleD bounds = AbsoluteBoundingBox;
childShapes.Add(retVal);
retVal.Location = new PointD(bounds.Width / 2, bounds.Height / 2);
return(retVal);
}