/// <summary>
/// Called when the value of the ActualOffsetRatioProperty property changes.
/// </summary>
/// <param name="oldValue">The value to be replaced.</param>
/// <param name="newValue">The new value.</param>
private void OnActualOffsetRatioPropertyChanged(double oldValue, double newValue)
{
RoutedPropertyChangedEventHandler <double> handler = this.ActualOffsetRatioChanged;
if (handler != null)
{
handler(this, new RoutedPropertyChangedEventArgs <double>(oldValue, newValue));
}
if (DesignerProperties.GetIsInDesignMode(this))
{
PieSeries.UpdatePieDataPointGeometry(this, ActualWidth, ActualHeight);
}
}
/// <summary>
/// Initializes a new instance of the PieDataPoint.
/// </summary>
public PieDataPoint()
{
DefaultStyleKey = typeof(PieDataPoint);
if (DesignerProperties.GetIsInDesignMode(this))
{
// Create default design-mode-friendly settings
ActualRatio = 0.2;
SizeChanged += delegate(object sender, SizeChangedEventArgs e)
{
// Handle SizeChanged event to update Geometry dynamically
PieSeries.UpdatePieDataPointGeometry(this, e.NewSize.Width, e.NewSize.Height);
};
}
}