private void UpdateThrottlerUnlocked()
{
// before measure every element in the chart
// we copy the properties that might change while we are updating the chart
// this call should be thread safe
// ToDo: ensure it is thread safe...
viewDrawMargin = chartView.DrawMargin;
controlSize = chartView.ControlSize;
yAxes = chartView.YAxes.Select(x => x.Copy()).ToArray();
xAxes = chartView.XAxes.Select(x => x.Copy()).ToArray();
measureWorker = new object();
series = chartView.Series.Select(series =>
{
// a good implementation of ISeries<T>
// must use the measureWorker to identify
// if the points are already fetched.
// this way no matter if the Series.Values collection changes
// the fetch method will always return the same collection for the
// current measureWorker instance
series.Fetch(this);
return(series);
}).ToArray();
legendPosition = chartView.LegendPosition;
legendOrientation = chartView.LegendOrientation;
legend = chartView.Legend; // ... this is a reference type.. this has no sense
tooltipPosition = chartView.TooltipPosition;
tooltipFindingStrategy = chartView.TooltipFindingStrategy;
tooltip = chartView.Tooltip; //... no sense again...
animationsSpeed = chartView.AnimationsSpeed;
easingFunction = chartView.EasingFunction;
Measure();
}
/// <inheritdoc cref="HoverArea.IsPointerOver(LvcPoint, TooltipFindingStrategy)"/>
public override bool IsPointerOver(LvcPoint pointerLocation, TooltipFindingStrategy strategy)
{
var startAngle = StartAngle % 360;
// -0.01 is a work around to avoid the case where the last slice (360) would be converted to 0 also
var endAngle = (EndAngle - 0.01) % 360;
var dx = CenterX - pointerLocation.X;
var dy = CenterY - pointerLocation.Y;
var beta = Math.Atan(dy / dx) * (180 / Math.PI);
if ((dx > 0 && dy < 0) || (dx > 0 && dy > 0))
{
beta += 180;
}
if (dx < 0 && dy > 0)
{
beta += 360;
}
var r = Math.Sqrt(Math.Pow(dx, 2) + Math.Pow(dy, 2));
return(startAngle <= beta && endAngle >= beta && r < Radius); // previously -> startAngle <= beta && endAngle >= beta && r < Radius ? 0 : float.MaxValue;
}
/// <inheritdoc cref="GetDistanceToPoint(PointF, TooltipFindingStrategy)"/>
public override float GetDistanceToPoint(PointF point, TooltipFindingStrategy strategy)
{
var startAngle = StartAngle % 360;
// -0.01 is a work around to avoid the case where the last slice (360) would be converted to 0 also
var endAngle = (EndAngle - 0.01) % 360;
var dx = CenterX - point.X;
var dy = CenterY - point.Y;
var beta = Math.Atan(dy / dx) * (180 / Math.PI);
if (dx > 0 && dy < 0 || dx > 0 && dy > 0)
{
beta += 180;
}
if (dx < 0 && dy > 0)
{
beta += 360;
}
var r = Math.Sqrt(Math.Pow(dx, 2) + Math.Pow(dy, 2));
return(startAngle <= beta && endAngle >= beta && r < Radius ? 0 : float.MaxValue);
}
/// <summary> /// Determines whether the area is trigger by the specified point in the user interface. /// </summary> /// <param name="point">The point.</param> /// <param name="strategy">The strategy.</param> /// <returns> /// <c>true</c> if [is trigger by] [the specified point]; otherwise, <c>false</c>. /// </returns> public abstract bool IsTriggerBy(PointF point, TooltipFindingStrategy strategy);
/// <summary> /// Determines whether the area is trigger by the specified point in the user interface. /// </summary> /// <param name="point">The point.</param> /// <param name="strategy">The strategy.</param> /// <returns> /// <c>true</c> if [is trigger by] [the specified point]; otherwise, <c>false</c>. /// </returns> public abstract float GetDistanceToPoint(PointF point, TooltipFindingStrategy strategy);
/// <summary> /// Determines whether the pointer is over the area. /// </summary> /// <param name="pointerLocation">The pointer location.</param> /// <param name="strategy">The strategy.</param> /// <returns></returns> public abstract bool IsPointerOver(LvcPoint pointerLocation, TooltipFindingStrategy strategy);
