private void GetTargetCorners(Rect bounds, SnapLineOrientation orientation, SnapLineLocation location, out Point cornerPoint1, out Point cornerPoint2)
{
if (orientation == SnapLineOrientation.Horizontal)
{
if (location == SnapLineLocation.Minimum)
{
cornerPoint1 = bounds.TopLeft;
cornerPoint2 = bounds.TopRight;
}
else
{
cornerPoint1 = bounds.BottomLeft;
cornerPoint2 = bounds.BottomRight;
}
}
else if (location == SnapLineLocation.Minimum)
{
cornerPoint1 = bounds.TopLeft;
cornerPoint2 = bounds.BottomLeft;
}
else
{
cornerPoint1 = bounds.TopRight;
cornerPoint2 = bounds.BottomRight;
}
}
public SnapLine(Point p1, Point p2, SnapLineOrientation orientation, SnapLineLocation location, bool isContainerLine)
{
this.p1 = p1;
this.p2 = p2;
this.orientation = orientation;
this.location = location;
this.isContainerLine = isContainerLine;
}
private List <SnapLine> FindNearestSnapLines(Point p1, Point p2, SnapLineLocation location, SnapLineOrientation orientation, double snapThreshold, out double adjustment)
{
List <SnapLine> resultSnapLines = new List <SnapLine>();
double smallestSignedDistance = double.MaxValue;
foreach (SnapLine snapLine in this.snapLines)
{
double offset;
if (snapLine.Orientation == orientation && this.ShouldSnap(p1, p2, location, snapLine, out offset))
{
smallestSignedDistance = this.CheckForCloserSnapLine(p1, location, snapThreshold, resultSnapLines, smallestSignedDistance, snapLine, offset);
if (offset != 0.0)
{
smallestSignedDistance = this.CheckForCloserSnapLine(p1, location, snapThreshold, resultSnapLines, smallestSignedDistance, snapLine, 0.0);
}
}
}
adjustment = resultSnapLines.Count > 0 ? smallestSignedDistance : 0.0;
return(resultSnapLines);
}
private double CheckForCloserSnapLine(Point p1, SnapLineLocation location, double snapThreshold, List <SnapLine> resultSnapLines, double smallestSignedDistance, SnapLine snapLine, double offset)
{
double num1 = snapLine.GetSignedDistance(p1) + offset;
double num2 = Math.Abs(num1);
if (num2 <= snapThreshold)
{
if (num2 < Math.Abs(smallestSignedDistance))
{
smallestSignedDistance = num1;
resultSnapLines.Clear();
}
if (Math.Abs(num1 - smallestSignedDistance) < 1E-06)
{
snapLine.LocationRelativeToTarget = location;
snapLine.OffsetRelativeToTarget = offset;
resultSnapLines.Add(snapLine);
}
}
return(smallestSignedDistance);
}
private bool ShouldSnap(Point p1, Point p2, SnapLineLocation location, SnapLine snapLine, out double offset)
{
offset = 0.0;
if (location == snapLine.Location)
{
if (!snapLine.IsContainerLine)
{
return(true);
}
if (snapLine.RangeOverlaps(p1, p2))
{
offset = location == SnapLineLocation.Minimum ? this.defaultPadding : -this.defaultPadding;
return(true);
}
}
else if ((location == SnapLineLocation.Minimum && snapLine.Location == SnapLineLocation.Maximum || location == SnapLineLocation.Maximum && snapLine.Location == SnapLineLocation.Minimum) && (!snapLine.IsContainerLine && snapLine.RangeOverlaps(p1, p2)))
{
offset = snapLine.Location == SnapLineLocation.Minimum ? -this.defaultMargin : this.defaultMargin;
return(true);
}
return(false);
}
