//If the result is true this method also sets the currently active edit point.
public bool EditPointsHitTest(Point pt)
{
if (this.EditPoints.Count > 0)
{
foreach (EditPoint editPoint in this.EditPoints)
{
if (DesignerGeometryHelper.DistanceBetweenPoints(pt, editPoint.Location) <= EditPointHitTestRadius)
{
this.activeEditPoint = editPoint;
return(true);
}
}
}
return(false);
}
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
PathSegmentCollection retVal = new PathSegmentCollection();
PointCollection pointCollection = value as PointCollection;
if (RoundRadius > 0)
{
if (pointCollection != null && pointCollection.Count > 0)
{
retVal.Add(new LineSegment(pointCollection[0], true));
double curSegmentArcUsed = 0;
for (int i = 1; i < pointCollection.Count - 1; i++)
{
double dist1 = DesignerGeometryHelper.DistanceBetweenPoints(pointCollection[i - 1], pointCollection[i]);
double dist2 = DesignerGeometryHelper.DistanceBetweenPoints(pointCollection[i], pointCollection[i + 1]);
if (dist1 - curSegmentArcUsed > RoundRadius &&
dist2 > RoundRadius)
{
//build rounded arc at line join.
curSegmentArcUsed = RoundRadius;
Vector firstSegmentPointingVector = new Vector(pointCollection[i].X - pointCollection[i - 1].X, pointCollection[i].Y - pointCollection[i - 1].Y);
Vector secondSegmentPointingVector = new Vector(pointCollection[i + 1].X - pointCollection[i].X, pointCollection[i + 1].Y - pointCollection[i].Y);
firstSegmentPointingVector.Normalize();
secondSegmentPointingVector.Normalize();
Point turningPoint1 = Point.Add(pointCollection[i - 1], Vector.Multiply(dist1 - RoundRadius, firstSegmentPointingVector));
Point turningPoint2 = Point.Add(pointCollection[i], Vector.Multiply(RoundRadius, secondSegmentPointingVector));
double crossProductZ = firstSegmentPointingVector.X * secondSegmentPointingVector.Y - firstSegmentPointingVector.Y * secondSegmentPointingVector.X;
retVal.Add(new LineSegment(turningPoint1, true));
retVal.Add(new ArcSegment(turningPoint2, new Size(RoundRadius, RoundRadius), 0, false, crossProductZ > 0 ? SweepDirection.Clockwise : SweepDirection.Counterclockwise, true));
}
else
{
curSegmentArcUsed = 0;
retVal.Add(new LineSegment(pointCollection[i], true));
}
}
retVal.Add(new LineSegment(pointCollection[pointCollection.Count - 1], true));
}
}
return(retVal);
}
public static ConnectionPoint GetClosestConnectionPoint(List <ConnectionPoint> connectionPoints, Point refPoint, out double minDist)
{
minDist = double.PositiveInfinity;
if (connectionPoints == null || connectionPoints.Count == 0)
{
return(null);
}
double dist = 0;
ConnectionPoint closestPoint = null;
foreach (ConnectionPoint point in connectionPoints)
{
dist = DesignerGeometryHelper.DistanceBetweenPoints(refPoint, point.Location);
if (dist < minDist)
{
minDist = dist;
closestPoint = point;
}
}
return(closestPoint);
}
public static bool IsEqualTo(this Point point1, Point point2)
{
return(DesignerGeometryHelper.DistanceBetweenPoints(point1, point2) < DesignerGeometryHelper.EPS);
}
void UpdateEditPoints(Point newPoint)
{
if (this.editPoints.Count < 2 ||
this.editPoints[0].Type != EditPoint.EditPointTypes.ConnectionEditPoint ||
this.editPoints[this.editPoints.Count - 1].Type != EditPoint.EditPointTypes.ConnectionEditPoint)
{
Fx.Assert(false, "EditPoints are invalid");
return;
}
if (this.activeEditPoint != null)
{
int activeEditPointIndex = this.editPoints.IndexOf(this.activeEditPoint);
EditPoint previous = (activeEditPointIndex > 0) ? this.editPoints[activeEditPointIndex - 1] : null;
EditPoint next = (activeEditPointIndex < this.editPoints.Count - 1) ? this.editPoints[activeEditPointIndex + 1] : null;
//Note that extra edit points are only added if we are connected to connection point
if (previous != null && previous.Type == EditPoint.EditPointTypes.ConnectionEditPoint)
{
double slopeOfLine = DesignerGeometryHelper.SlopeOfLineSegment(previous.Location, this.activeEditPoint.Location);
Orientation orientation = (Math.Abs(slopeOfLine) < 1) ? Orientation.Horizontal : Orientation.Vertical;
int editPointOffset = Convert.ToInt32(DesignerGeometryHelper.DistanceBetweenPoints(previous.Location, (next != null) ? next.Location : this.activeEditPoint.Location)) / 4;
if (orientation == Orientation.Horizontal)
{
editPointOffset *= (previous.Location.X < this.activeEditPoint.Location.X) ? 1 : -1;
}
else
{
editPointOffset *= (previous.Location.Y < this.activeEditPoint.Location.Y) ? 1 : -1;
}
activeEditPointIndex = this.editPoints.IndexOf(this.activeEditPoint);
Point editPointLocation = (orientation == Orientation.Horizontal) ? new Point(previous.Location.X + editPointOffset, previous.Location.Y) : new Point(previous.Location.X, previous.Location.Y + editPointOffset);
previous = new EditPoint(EditPoint.EditPointTypes.MultiSegmentEditPoint, editPointLocation);
this.editPoints.InsertRange(activeEditPointIndex, new EditPoint[] { new EditPoint(EditPoint.EditPointTypes.MultiSegmentEditPoint, editPointLocation), previous });
}
if (next != null && next.Type == EditPoint.EditPointTypes.ConnectionEditPoint)
{
double slopeOfLine = DesignerGeometryHelper.SlopeOfLineSegment(this.activeEditPoint.Location, next.Location);
Orientation orientation = (Math.Abs(slopeOfLine) < 1) ? Orientation.Horizontal : Orientation.Vertical;
int editPointOffset = Convert.ToInt32(DesignerGeometryHelper.DistanceBetweenPoints((previous != null) ? previous.Location : this.activeEditPoint.Location, next.Location)) / 4;
if (orientation == Orientation.Horizontal)
{
editPointOffset *= (this.activeEditPoint.Location.X < next.Location.X) ? -1 : 1;
}
else
{
editPointOffset *= (this.activeEditPoint.Location.Y < next.Location.Y) ? -1 : 1;
}
activeEditPointIndex = this.editPoints.IndexOf(this.activeEditPoint);
Point editPointLocation = (orientation == Orientation.Horizontal) ? new Point(next.Location.X + editPointOffset, next.Location.Y) : new Point(next.Location.X, next.Location.Y + editPointOffset);
next = new EditPoint(EditPoint.EditPointTypes.MultiSegmentEditPoint, editPointLocation);
this.editPoints.InsertRange(activeEditPointIndex + 1, new EditPoint[] { next, new EditPoint(EditPoint.EditPointTypes.MultiSegmentEditPoint, editPointLocation) });
}
if (this.activeEditPoint.Type == EditPoint.EditPointTypes.ConnectionEditPoint)
{
Fx.Assert(this.editPoints[0].Type == EditPoint.EditPointTypes.ConnectionEditPoint, "EditPoint type is wrong.");
Fx.Assert(this.editPoints[editPoints.Count - 1].Type == EditPoint.EditPointTypes.ConnectionEditPoint, "EditPoint type is wrong.");
this.activeEditPoint.Location = newPoint;
Fx.Assert(this.editPoints.Count > 0, "Some edit point should exist");
ConnectionPoint targetConnPt = null;
Point[] points = null;
Point begin = this.editPoints[0].Location;
Point end = this.editPoints[this.editPoints.Count - 1].Location;
if (typeof(ConnectionPointsAdorner).IsAssignableFrom(Mouse.DirectlyOver.GetType()))
{
ConnectionPointsAdorner connPtsAdorner = Mouse.DirectlyOver as ConnectionPointsAdorner;
targetConnPt = FreeFormPanel.ConnectionPointHitTest(newPoint, connPtsAdorner);
}
if (activeEditPointIndex == 0)
{
// We are dragging the source point of a connector.
ConnectionPoint destConnPt = FreeFormPanel.GetDestinationConnectionPoint(this.editedConnector);
if (targetConnPt != null)
{
points = ConnectorRouter.Route(parentPanel, targetConnPt, destConnPt);
this.activeEditPoint.Location = targetConnPt.Location;
}
else
{
points = ConnectorRouter.Route(parentPanel, begin, destConnPt);
}
}
else
{
// We are dragging the destination point of a connector.
ConnectionPoint srcConnPt = FreeFormPanel.GetSourceConnectionPoint(this.editedConnector);
if (targetConnPt != null)
{
points = ConnectorRouter.Route(parentPanel, srcConnPt, targetConnPt);
this.activeEditPoint.Location = targetConnPt.Location;
}
else
{
points = ConnectorRouter.Route(parentPanel, srcConnPt, end);
}
}
//When we start editing the end point we need to clear the slate and start over
List <EditPoint> newEditPoints = new List <EditPoint>();
if (points != null && points.Length > 1)
{
RemoveEditPoints(EditPoint.EditPointTypes.MultiSegmentEditPoint);
for (int i = 1; i < points.Length - 1; ++i)
{
newEditPoints.Add(new EditPoint(EditPoint.EditPointTypes.MultiSegmentEditPoint, points[i]));
}
this.editPoints.InsertRange(1, newEditPoints.ToArray());
}
}
else if (this.activeEditPoint.Type == EditPoint.EditPointTypes.MultiSegmentEditPoint)
{
if (previous != null && previous.Type != EditPoint.EditPointTypes.ConnectionEditPoint && next != null && next.Type != EditPoint.EditPointTypes.ConnectionEditPoint)
{
//Update the previous point
double slopeOfLine = DesignerGeometryHelper.SlopeOfLineSegment(previous.Location, this.activeEditPoint.Location);
Orientation orientation = (Math.Abs(slopeOfLine) < 1) ? Orientation.Horizontal : Orientation.Vertical;
previous.Location = (orientation == Orientation.Horizontal) ? new Point(previous.Location.X, newPoint.Y) : new Point(newPoint.X, previous.Location.Y);
//Update the next point
slopeOfLine = DesignerGeometryHelper.SlopeOfLineSegment(this.activeEditPoint.Location, next.Location);
orientation = (Math.Abs(slopeOfLine) < 1) ? Orientation.Horizontal : Orientation.Vertical;
next.Location = (orientation == Orientation.Horizontal) ? new Point(next.Location.X, newPoint.Y) : new Point(newPoint.X, next.Location.Y);
//Update the current point
this.activeEditPoint.Location = newPoint;
}
else
{
Fx.Assert(false, "Should not be here. UpdateEditPoints failed.");
}
}
}
// Remove all the redundant edit points
RemoveCoincidingEditPoints();
bool validEditPoints = ValidateEditPoints();
Fx.Assert(validEditPoints, "Validating EditPoints failed.");
}
