/// <summary>
/// Shows flying range from given point; shows a half transparent cone on the map that is
/// created with some flying parameters like gliding ratio, wind spee and direction.
/// </summary>
/// <param name="point">point to calculate flying range for</param>
/// <returns>task to wait on</returns>
private async Task ShowFlyingRange(MapPoint point)
{
FlyingRangeParameters parameters = await FlyingRangePopupPage.ShowAsync();
if (parameters != null)
{
this.mapView.ShowFlyingRange(point, parameters);
}
}
/// <summary>
/// Shows "flying parameters" popup page and lets the user edit the values.
/// </summary>
/// <returns>flying range parameters</returns>
public static async Task <FlyingRangeParameters> ShowAsync()
{
var popupPage = new FlyingRangePopupPage()
{
tcs = new TaskCompletionSource <FlyingRangeParameters>()
};
await popupPage.Navigation.PushPopupAsync(popupPage);
return(await popupPage.tcs.Task);
}
