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 void ExtendLine(Rect bounds, SnapLineOrientation orientation, ref Point p1, ref Point p2)
{
if (orientation == SnapLineOrientation.Horizontal)
{
p1.X = Math.Min(p1.X, bounds.Left);
p2.X = Math.Max(p2.X, bounds.Right);
}
else
{
p1.Y = Math.Min(p1.Y, bounds.Top);
p2.Y = Math.Max(p2.Y, bounds.Bottom);
}
}
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);
}
