private List <ILayoutAction> CreateLayoutActions(LayoutVertexToPointMap newVertexCenters)
{
var layoutActions = new List <ILayoutAction>();
layoutActions.AddRange(CreateLayoutActionsForMovedDiagramNodes(newVertexCenters));
layoutActions.AddRange(CreateLayoutActionsForRerouteAllPaths(newVertexCenters));
return(layoutActions);
}
public IncrementalLayoutEngine()
{
_diagramNodeToLayoutVertexMap = new Map <IDiagramNode, DiagramNodeLayoutVertex>();
_diagramConnectorToLayoutPathMap = new Map <IDiagramConnector, LayoutPath>();
_layoutPathToPreviousRouteMap = new Map <LayoutPath, Route>();
_previousVertexCenters = new LayoutVertexToPointMap();
_relativeLayoutCalculator = new RelativeLayoutCalculator();
_diagramActionDispatcherVisitor = new DiagramActionDispatcherVisitor(this);
}
public IncrementalLayoutCalculator(ILayoutPriorityProvider layoutPriorityProvider)
{
_layoutPriorityProvider = layoutPriorityProvider ?? throw new ArgumentNullException(nameof(layoutPriorityProvider));
_diagramNodeToLayoutVertexMap = new Map <IDiagramNode, DiagramNodeLayoutVertex>(new DiagramNodeIdEqualityComparer());
_diagramConnectorToLayoutPathMap = new Map <IDiagramConnector, LayoutPath>(new DiagramConnectorIdEqualityComparer());
_layoutPathToPreviousRouteMap = new Map <LayoutPath, Route>();
_previousVertexCenters = new LayoutVertexToPointMap();
_relativeLayoutCalculator = new RelativeLayoutCalculator();
_diagramActionDispatcherVisitor = new DiagramActionDispatcherVisitor(this);
}
private void SaveCurrentLayoutPaths(LayoutVertexToPointMap newVertexCenters)
{
_layoutPathToPreviousRouteMap.Clear();
foreach (var layoutPath in RelativeLayout.LayeredLayoutGraph.Edges)
{
var currentRoute = GetRoutePoints(layoutPath, newVertexCenters);
_layoutPathToPreviousRouteMap.Set(layoutPath, currentRoute);
}
}
private IEnumerable <ILayoutAction> CreateLayoutActionsForRerouteAllPaths(LayoutVertexToPointMap newVertexCenters)
{
foreach (var layoutPath in RelativeLayout.LayeredLayoutGraph.Edges)
{
_layoutPathToPreviousRouteMap.TryGet(layoutPath, out var oldRoute, valueForMissingKey: Route.Empty);
var newRoute = GetRoutePoints(layoutPath, newVertexCenters);
if (newRoute.IsDefined && newRoute != oldRoute)
{
yield return(new ReroutePathLayoutAction(layoutPath, oldRoute, newRoute));
}
}
}
private IEnumerable <ILayoutAction> CreateLayoutActionsForMovedDiagramNodes(LayoutVertexToPointMap newVertexCenters)
{
foreach (var diagramNodeLayoutVertex in RelativeLayout.LayeredLayoutGraph.Vertices)
{
var oldCenter = GetVertexCenterOrUndefined(_previousVertexCenters, diagramNodeLayoutVertex);
var newCenter = GetVertexCenterOrUndefined(newVertexCenters, diagramNodeLayoutVertex);
if (newCenter.IsDefined && newCenter != oldCenter)
{
yield return(new MoveDiagramNodeLayoutAction(diagramNodeLayoutVertex, oldCenter, newCenter));
}
}
}
private static Route GetRoutePoints(LayoutPath layoutPath, LayoutVertexToPointMap vertexCenters)
{
var sourceRect = vertexCenters.GetRect(layoutPath.PathSource);
var targetRect = vertexCenters.GetRect(layoutPath.PathTarget);
var routePoints = new Route.Builder
{
sourceRect.Center,
layoutPath.InterimVertices.Select(vertexCenters.Get),
targetRect.Center
}.ToRoute();
return(routePoints.AttachToSourceRectAndTargetRect(sourceRect, targetRect));
}
private static Point2D GetVertexCenterOrUndefined(LayoutVertexToPointMap vertexCenters, LayoutVertexBase vertex)
{
vertexCenters.TryGet(vertex, out var center, valueForMissingKey: Point2D.Undefined);
return(center);
}
private void SaveCurrentPositions(LayoutVertexToPointMap newVertexCenters)
{
_previousVertexCenters = newVertexCenters;
SaveCurrentLayoutPaths(newVertexCenters);
}
private static Point2D GetVertexCenterOrUndefined(LayoutVertexToPointMap vertexCenters, LayoutVertexBase vertex)
{
return(vertexCenters.Contains(vertex)
? vertexCenters.Get(vertex)
: Point2D.Undefined);
}