/// <inheritdoc />
public override Thickness ArrangeTick(TickText tickText, ArcInfo arc, AngularTextBar textBar)
{
var angle = Interpolate.Linear(textBar.Minimum, textBar.Maximum, tickText.Value)
.Clamp(0, 1)
.Interpolate(textBar.Start, textBar.End, textBar.IsDirectionReversed);
tickText.Transform = Transform.Identity;
var textGeometry = tickText.BuildGeometry(new Point(0, 0));
var compVector = textGeometry.Bounds.TopLeft.ToVector();
var rotatedCompVector = new Vector(compVector.X, compVector.Y);
var diffVector = new Vector(0, 0);
var textAngle = Angle.Zero;
switch (textBar.TextOrientation)
{
case TextOrientation.Tangential:
textAngle = angle.IsUpperQuadrants() ? angle : angle + Angle.FromDegrees(180);
tickText.Transform = new RotateTransform(textAngle.Degrees);
rotatedCompVector = compVector.Rotate(textAngle);
var vectorFromCenterToUpperLeft = new Vector(textGeometry.Bounds.Width / 2, textGeometry.Bounds.Height / 2);
var rotatedCenterVectorComp = vectorFromCenterToUpperLeft.Rotate(textAngle);
diffVector = vectorFromCenterToUpperLeft - rotatedCenterVectorComp;
break;
case TextOrientation.Horizontal:
tickText.Transform = Transform.Identity;
break;
default:
throw new ArgumentOutOfRangeException();
}
var pos = arc.GetUpperLeftPointAtOffset(textGeometry.Bounds.Size.Rotate(textAngle), angle, textBar.TextOffset);
tickText.TranslateTransform.SetCurrentValue(TranslateTransform.XProperty, pos.X + diffVector.X - rotatedCompVector.X);
tickText.TranslateTransform.SetCurrentValue(TranslateTransform.YProperty, pos.Y + diffVector.Y - rotatedCompVector.Y);
return(default(Thickness));
}
/// <summary> /// Updates the transform of <paramref name="tickText"/> /// </summary> /// <returns>Returns the overflow.</returns> public abstract Thickness ArrangeTick(TickText tickText, ArcInfo arc, AngularTextBar textBar);