/// <summary>
/// Called as the pointer is moved over potential targets after a source is selected
/// So should be pretty quick
/// </summary>
/// <remarks>
/// The cursor can change dependant on CanCreateConnection when this returns true
/// </remarks>
/// <param name="sourceShapeElement">ShapeElement</param>
/// <param name="targetShapeElement">ShapeElement</param>
/// <returns></returns>
public override bool IsValidSourceAndTarget(ShapeElement sourceShapeElement, ShapeElement targetShapeElement)
{
ModelNoteConnectAction action = (sourceShapeElement.Diagram as ORMDiagram).ModelNoteConnectAction;
ORMModelElement sourceElement;
ORMModelElement targetElement;
if (null != (sourceElement = action.mySourceElement) &&
null != (targetElement = ElementFromShape <ORMModelElement>(targetShapeElement)))
{
ModelNote note = null;
if (null == (note = sourceElement as ModelNote))
{
if (null != (note = targetElement as ModelNote))
{
// Switch the source and target
targetElement = sourceElement;
}
}
if (note != null)
{
FactType factType;
ObjectType objectType;
SetConstraint setConstraint;
SetComparisonConstraint setComparisonConstraint;
if (null != (factType = targetElement as FactType))
{
return(!note.FactTypeCollection.Contains(factType));
}
else if (null != (objectType = targetElement as ObjectType))
{
return(!note.ObjectTypeCollection.Contains(objectType));
}
else if (null != (setConstraint = targetElement as SetConstraint))
{
return(!setConstraint.Constraint.ConstraintIsInternal && !note.SetConstraintCollection.Contains(setConstraint));
}
else if (null != (setComparisonConstraint = targetElement as SetComparisonConstraint))
{
return(!note.SetComparisonConstraintCollection.Contains(setComparisonConstraint));
}
}
}
return(false);
}
/// <summary>
/// Create a connection between an ModelNoteShape and a FactType or ObjectType.
/// </summary>
/// <param name="sourceShapeElement">The source of the requested connection</param>
/// <param name="targetShapeElement">The target of the requested connection</param>
/// <param name="paintFeedbackArgs">PaintFeedbackArgs</param>
public override void CreateConnection(ShapeElement sourceShapeElement, ShapeElement targetShapeElement, PaintFeedbackArgs paintFeedbackArgs)
{
ModelNoteConnectAction action = (sourceShapeElement.Diagram as ORMDiagram).ModelNoteConnectAction;
ORMModelElement sourceElement;
ORMModelElement targetElement;
if (null != (sourceElement = action.mySourceElement) &&
null != (targetElement = ElementFromShape <ORMModelElement>(targetShapeElement)))
{
ModelNote note = null;
if (null == (note = sourceElement as ModelNote))
{
if (null != (note = targetElement as ModelNote))
{
// Switch the source and target
targetElement = sourceElement;
}
}
if (note != null)
{
FactType factType;
ObjectType objectType;
SetConstraint setConstraint;
SetComparisonConstraint setComparisonConstraint;
if (null != (factType = targetElement as FactType))
{
new ModelNoteReferencesFactType(note, factType);
}
else if (null != (objectType = targetElement as ObjectType))
{
new ModelNoteReferencesObjectType(note, objectType);
}
else if (null != (setConstraint = targetElement as SetConstraint))
{
new ModelNoteReferencesSetConstraint(note, setConstraint);
}
else if (null != (setComparisonConstraint = targetElement as SetComparisonConstraint))
{
new ModelNoteReferencesSetComparisonConstraint(note, setComparisonConstraint);
}
}
}
}
