/// <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);
}