public override bool CanCreateConnection(ShapeElement sourceShapeElement, ShapeElement targetShapeElement, ref string connectionWarning)
{
ShapeElement realSource = ConnectorConnectAction.TopLevelShape(sourceShapeElement);
ShapeElement realTarget = ConnectorConnectAction.TopLevelShape(targetShapeElement);
ModelElement sourceElement = realSource.ModelElement;
ModelElement targetElement = realTarget.ModelElement;
if (realSource == null || realTarget == null)
{
return(false);
}
else if (realSource == realTarget)
{
connectionWarning = String.Format(System.Globalization.CultureInfo.CurrentCulture,
"No Self-Connections");
return(false);
}
else if (targetElement.GetType() == typeof(ISpySoft.FeatureModelLanguage.DomainModel.RootFeature))
{
connectionWarning = String.Format(System.Globalization.CultureInfo.CurrentCulture,
"Connection to RootFeature not allowed");
return(false);
}
else if (targetElement.GetType() == typeof(ISpySoft.FeatureModelLanguage.DomainModel.FeatureSet))
{
connectionWarning = String.Format(System.Globalization.CultureInfo.CurrentCulture,
"Cannot connect FeatureSet with this Connector");
return(false);
}
else if (targetElement.GetElementLinks().Count > 2)
{
if (NavigationHelper.HasParentShape(targetElement))
{
connectionWarning = String.Format(System.Globalization.CultureInfo.CurrentCulture,
"Cannot connect a Shape which has already a parent Shape");
return(false);
}
else
{
return(true);
}
}
else
{
return(true);
}
}
public override bool CanCreateConnection(ShapeElement sourceShapeElement, ShapeElement targetShapeElement, ref string connectionWarning)
{
if (!base.CanCreateConnection(sourceShapeElement, targetShapeElement, ref connectionWarning))
{
return(false);
}
ShapeElement realSource = ConnectorConnectAction.TopLevelShape(sourceShapeElement);
ShapeElement realTarget = ConnectorConnectAction.TopLevelShape(targetShapeElement);
ModelElement sourceElement = realSource.ModelElement;
ModelElement targetElement = realTarget.ModelElement;
if (realSource == null || realTarget == null)
{
return(false);
}
if (realSource == realTarget)
{
connectionWarning = String.Format(System.Globalization.CultureInfo.CurrentCulture,
"No Self-Connections");
return(false);
}
if (targetElement.GetElementLinks().Count > 2)
{
if (NavigationHelper.HasParentShape(targetElement))
{
connectionWarning = String.Format(System.Globalization.CultureInfo.CurrentCulture,
"Cannot connect a Shape which has already a parent Shape");
return(false);
}
}
return(true);
} // CanCreateConnection()
/// <summary>
/// Whether one object is transitively reachable from another via a specific relation.
/// </summary>
/// <param name="source"></param>
/// <param name="goal"></param>
/// <param name="sourceRole">Source Role of the relation, as played by the source</param>
/// <param name="targetRole">Target role of the relation, as played by the target</param>
/// <returns></returns>
internal static bool HasParentShape(ModelElement targetElement)
{
foreach (Object o in targetElement.GetElementLinks())
{
if (o.GetType() == typeof(ISpySoft.FeatureModelLanguage.DomainModel.RelationshipFeatureSet))
{
AbstractFeature roletarget = ((ISpySoft.FeatureModelLanguage.DomainModel.RelationshipFeatureSet)o).ObjectTransitionTo;
if (targetElement == roletarget)
{
return(true);
}
}
else if (o.GetType() == typeof(ISpySoft.FeatureModelLanguage.DomainModel.RelationshipFeature))
{
AbstractFeature roletarget = ((ISpySoft.FeatureModelLanguage.DomainModel.RelationshipFeature)o).TransitionTo;
if (targetElement == roletarget)
{
return(true);
}
}
}
return(false);
}