Exemple #1
0
        /// <summary>
        /// Adjusts the end points position to an optimal position
        /// (when their <see cref="DragThumb.Placement"/> is set
        /// to <see cref="EPlacementKind.ParentAutoPos"/>).
        /// </summary>
        public bool AdjustEndPoints()
        {
#if SILVERLIGHT
            if (StartNode != null && !sourceMeasureValid)
            {
                sourceMeasureValid = StartNode.GetBounds().Width != 0;
            }
            if (EndNode != null && !targetMeasureValid)
            {
                targetMeasureValid = EndNode.GetBounds().Width != 0;
            }
#endif
            // StartNode and EndNode now can be null to allow disconnected connector points
            if (StartNode != null && !StartNode.IsMeasureValid)
            {
                return(false);
            }
            if (EndNode != null && !EndNode.IsMeasureValid)
            {
                return(false);
            }

            if (StartPoint == null || EndPoint == null ||
                !targetMeasureValid || !sourceMeasureValid)
            {
                return(false);
            }

            #region set source junctionEnd position

            double angle = StartNode != null ? StartNode.BoundsAngle : 0;

            if (StartPoint.Placement == EPlacementKind.AbsoluteSubCanvas)
            {
                Point snappedStart = StartNode.GetBounds().Normalize().SnapPointToRectangle(StartPoint.Position);
                if (snappedStart != StartPoint.Position)
                {
                    StartPoint.SetPreferedPosition(snappedStart);
                }
            }

            if (AutoPosModeOnly && StartPoint.Placement != EPlacementKind.ParentAutoPos)
            {
                StartPoint.Placement = EPlacementKind.ParentAutoPos;
            }

            // Condition removed to allow disconnected connector points
            //if (StartNode.IsMeasureValid /*&& (viewHelperPointsCollection == null || Points.Count == viewHelperPointsCollection.Count)*/
            //    /*&& (StartPoint.Placement == EPlacementKind.ParentAutoPos || viewHelperPointsCollection == null || viewHelperPointsCollection.PointsInvalid)*/)
            {
                Rect r1 = GeometryHelper.GetFirstElementBounds(this);
                Rect r2 = GeometryHelper.GetFirstButOneElementBounds(this);

                Point p1 = GeometryHelper.RectangleRectangleCenterIntersection(r1, r2, true, angle);

                if (StartPoint.Placement != EPlacementKind.ParentAutoPos && StartPoint.Position.AlmostEqual(p1) && !((IDraggable)StartPoint).DragThumb.IsDragged)
                {
                    StartPoint.Placement = EPlacementKind.ParentAutoPos;
                }

                if (StartPoint.Placement == EPlacementKind.ParentAutoPos)
                { // simplified to this..
                    StartPoint.SetPreferedPosition(p1);
                }

                //if (viewHelperPointsCollection == null)
                //{
                //    StartPoint.SetPreferedPosition(p1);
                //}
                //else if (!viewHelperPointsCollection.First().AlmostEqual(p1))
                //{
                //    if (viewHelperPointsCollection.PointsInvalid)
                //    {
                //        viewHelperPointsCollection[0].Set(p1);
                //        StartPoint.SetPreferedPosition(p1);
                //        viewHelperPointsCollection.PointsInvalid = false;
                //    }
                //    else
                //    {
                //        if (!sourceMeasureValid)
                //        {
                //            if (p1 != StartPoint.Position)
                //            {
                //                if (!AutoPosModeOnly)
                //                {
                //                    StartPoint.Placement = EPlacementKind.AbsoluteSubCanvas;
                //                    Point snapped = r1.Normalize().SnapPointToRectangle(StartPoint.Position);
                //                    if (snapped != StartPoint.Position)
                //                        StartPoint.SetPreferedPosition(snapped);
                //                }
                //            }
                //        }
                //        else
                //        {
                //            viewHelperPointsCollection[0].Set(p1);
                //            StartPoint.SetPreferedPosition(p1);
                //        }
                //    }
                //}
                //else
                //{
                //    StartPoint.SetPreferedPosition(p1);
                //    StartPoint.Placement = EPlacementKind.ParentAutoPos;
                //}
                sourceMeasureValid = true;
            }

            #endregion

            #region set end junctionEnd position

            if (EndPoint.Placement == EPlacementKind.AbsoluteSubCanvas)
            {
                Point snappedEnd = EndNode.GetBounds().Normalize().SnapPointToRectangle(EndPoint.Position);
                if (snappedEnd != EndPoint.Position)
                {
                    EndPoint.SetPreferedPosition(snappedEnd);
                }
            }


            angle = EndNode != null ? EndNode.BoundsAngle : 0;
            if (AutoPosModeOnly && EndPoint.Placement != EPlacementKind.ParentAutoPos)
            {
                EndPoint.Placement = EPlacementKind.ParentAutoPos;
            }

            // Condition removed to allow disconnected connector points
            //if (EndNode.IsMeasureValid /*&& (viewHelperPointsCollection == null || Points.Count == viewHelperPointsCollection.Count)*/
            //    /*&& (EndPoint.Placement == EPlacementKind.ParentAutoPos || viewHelperPointsCollection == null || viewHelperPointsCollection.PointsInvalid)*/)
            {
                Rect r1 = GeometryHelper.GetLastElementBounds(this);
                Rect r2 = GeometryHelper.GetLastButOneElementBounds(this);

                Point p2 = GeometryHelper.RectangleRectangleCenterIntersection(r1, r2, true, angle);


                if (EndPoint.Placement != EPlacementKind.ParentAutoPos && EndPoint.Position.AlmostEqual(p2) && !((IDraggable)EndPoint).DragThumb.IsDragged)
                {
                    EndPoint.Placement = EPlacementKind.ParentAutoPos;
                }

                if (EndPoint.Placement == EPlacementKind.ParentAutoPos)
                { // simplified to this..
                    EndPoint.SetPreferedPosition(p2);
                }

                //if (viewHelperPointsCollection == null)
                //{
                //    EndPoint.SetPreferedPosition(p2);
                //}
                //else if (!viewHelperPointsCollection.Last().AlmostEqual(p2))
                //{
                //    if (viewHelperPointsCollection.PointsInvalid)
                //    {
                //        viewHelperPointsCollection.Last().Set(p2);
                //        EndPoint.SetPreferedPosition(p2);
                //        viewHelperPointsCollection.PointsInvalid = false;
                //    }
                //    else
                //    {
                //        if (!targetMeasureValid)
                //        {
                //            if (p2 != EndPoint.Position)
                //            {
                //                EndPoint.Placement = EPlacementKind.AbsoluteSubCanvas;
                //                Point snapped = r1.Normalize().SnapPointToRectangle(EndPoint.Position);
                //                if (snapped != EndPoint.Position)
                //                    EndPoint.SetPreferedPosition(snapped);
                //            }
                //        }
                //        else
                //        {
                //            viewHelperPointsCollection.Last().Set(p2);
                //            EndPoint.SetPreferedPosition(p2);
                //        }
                //    }
                //}
                //else
                //{
                //    EndPoint.SetPreferedPosition(p2);
                //    EndPoint.Placement = EPlacementKind.ParentAutoPos;
                //}
                targetMeasureValid = true;
            }

            #endregion

            return(true);
        }