// Sets the indicator geometry based on the scale and the current value
private void SetIndicatorGeometry(RadialScale scale, double value)
{
if (thePath != null)
{
double min = scale.MinAngle;
double max = scale.GetAngleFromValue(Value);
if (scale.SweepDirection == SweepDirection.Counterclockwise)
{
min = -min;
max = -max;
}
double rad = scale.GetIndicatorRadius();
if (rad > BarThickness)
{
Geometry geom = RadialScaleHelper.CreateArcGeometry(min, max, rad, BarThickness, scale.SweepDirection);
// Stop the recursive loop. Only set a new geometry if it is different from the current one
if (thePath.Data == null || thePath.Data.Bounds != geom.Bounds)
{
thePath.Data = geom;
}
}
}
}
protected override void ArrangeRanges(Size finalSize)
{
try
{
double maxRad = RadialScaleHelper.GetRadius(RadialType, finalSize, MinAngle, MaxAngle, SweepDirection);
Point center = RadialScaleHelper.GetCenterPosition(RadialType, finalSize, MinAngle, MaxAngle, SweepDirection);
// Cache the center of the RadialScale
this.Center = center;
double x = center.X;
double y = center.Y;
// Calculate the ranges' radius
double rad = maxRad;
//if (TickPlacement == RadialTickPlacement.Outward)
//{
// rad = maxRad - GetLabels().Max(p => p.DesiredSize.Height) - GetTicks().Max(p => p.DesiredSize.Height) - 1;
//}
// Draw the default range
if (UseDefaultRange)
{
double min = MinAngle, max = MaxAngle;
if (SweepDirection == SweepDirection.Counterclockwise)
{
min = -min;
max = -max;
}
// The null check needs to be done because otherwise the arrange pass will be called
// recursevely as I set new content for the path in every call
Geometry geom = RadialScaleHelper.CreateArcGeometry(min, max, rad, RangeThickness, SweepDirection);
if (def.Data == null || def.Data.Bounds != geom.Bounds)
{
def.Data = geom;
}
// Arrange the default range. move the start point of the
// figure (0, 0) in the center point (center)
def.Arrange(new Rect(center, finalSize));
}
// Arrange the rest of the ranges
double prevAngle = MinAngle;
if (SweepDirection == SweepDirection.Counterclockwise)
{
prevAngle = -prevAngle;
}
for (int i = 0; i < ranges.Count; i++)
{
Path range = ranges[i];
GaugeRange rng = Ranges[i];
double nextAngle = GetAngleFromValue(rng.Offset);
if (SweepDirection == SweepDirection.Counterclockwise)
{
nextAngle = -nextAngle;
}
range.Fill = new SolidColorBrush(rng.Color);
Geometry geom = RadialScaleHelper.CreateArcGeometry(prevAngle, nextAngle, rad, RangeThickness, SweepDirection);
// Check to avoid infinite loop
if (range.Data == null || range.Data.Bounds != geom.Bounds)
{
range.Data = geom;
}
// Arrange the default range. move the start point of the
// figure (0, 0) in the center point (center)
range.Arrange(new Rect(center, finalSize));
prevAngle = nextAngle;
}
}
catch { /* In the designer this throws an argument exception. I don't know why. */ }
}