private UpdateArcContext CreateUpdateArcContext(double angle, ArcSegment arc)
{
UpdateArcContext result = new UpdateArcContext();
result.angle = angle;
result.arc = arc;
result.center = this.center;
result.minAngle = this.minAngle;
result.radius = this.radius * this.radiusScale;
return(result);
}
private UpdateArcContext CreateUpdateArcContext(double angle, double startAngle)
{
UpdateArcContext arcContext = new UpdateArcContext();
arcContext.angle = angle;
arcContext.center = this.Center;
arcContext.radius = this.Radius * this.RadiusScale;
arcContext.arc = this.arc;
arcContext.minAngle = startAngle;
return(arcContext);
}
/// <summary>
/// Updates an arc segment with the provided data.
/// </summary>
/// <param name="context">A context for the arc to be updated. the arc to update is a part of the context.</param>
internal static void UpdateArc(UpdateArcContext context)
{
context.angle = context.arc.SweepDirection == SweepDirection.Clockwise ? context.angle : -context.angle;
var arcWidth = Math.Abs(context.angle - RadialGaugePanel.ConvertDegreesToRadians(context.minAngle));
// Ensure that start and endpoint will not match, so that arc is displayed.
if (arcWidth >= 2 * Math.PI)
{
context.angle -= Math.Sign(context.angle - context.minAngle) * 0.01;
}
Point arcEndPoint = RadialGaugePanel.CreateRotatedPoint(context.angle, context.radius, context.center, 1);
context.arc.IsLargeArc = arcWidth > Math.PI;
context.arc.Size = new Size(context.radius, context.radius);
context.arc.Point = arcEndPoint;
}
