/// <summary>
/// The RetrieveBall method is called to remove the ball from the wheel.
/// </summary>
public void RetrieveBall()
{
_ballControl.Visibility = Visibility.Hidden;
OnBallTossed?.Invoke(false); // Publish the status of the ball - the ball is no longer in the wheel.
}
/// <summary>
/// The TossBall method is called to toss the ball.
/// </summary>
public void TossBall()
{
try
{
if (_ballStoryBoard == null)
{
// Initialize the story board.
_ballStoryBoard = new Storyboard();
_ballStoryBoard.Completed += new EventHandler(BallStopped);
}
else if (_ballStoryBoard.GetCurrentState(_ballControl) == ClockState.Stopped || _ballStoryBoard.GetIsPaused(_ballControl))
{
return; // Ball is already moving or is paused - do not spin.
}
// Ball spinning animation 1.
if (_ballSpinningAnimation1 == null)
{
// Initialize the ball spinning animation.
_ballSpinningAnimation1 = new DoubleAnimation();
_ballSpinningAnimation1.SpeedRatio = Constants.BallSpeedRatio;
Storyboard.SetTargetName(_ballSpinningAnimation1, Constants.BallRotateTransformName);
Storyboard.SetTargetProperty(_ballSpinningAnimation1, new PropertyPath(RotateTransform.AngleProperty));
_ballStoryBoard.Children.Add(_ballSpinningAnimation1); // Add the animation to the story board.
}
// Number of rotations in total degrees - multiply by ball speed ratio (positive degrees for clockwise).
_ballSpinningAnimation1.From = 0;
_ballSpinningAnimation1.To = _winningNumberEndAngleDegrees + (Constants.FullCircleDegrees * Constants.BallSpeedRatio);
// Duration of spin seconds - multiply by ball speed ratio.
TimeSpan ballSpinningDuration = _wheelSpinningAnimation1EndTime.Subtract(DateTime.Now);
_ballSpinningAnimation1.Duration = TimeSpan.FromSeconds(ballSpinningDuration.TotalSeconds * Constants.BallSpeedRatio);
// Ball falling animation.
if (_ballFallingAnimation == null)
{
// Initialize the ball falling animation.
_ballFallingAnimation = new DoubleAnimation();
_ballFallingAnimation.SpeedRatio = Constants.BallSpeedRatio;
Storyboard.SetTargetName(_ballFallingAnimation, Constants.BallTranslateTransformName);
Storyboard.SetTargetProperty(_ballFallingAnimation, new PropertyPath(TranslateTransform.YProperty));
_ballStoryBoard.Children.Add(_ballFallingAnimation); // Add the animation to the story board.
}
// Distance for the ball to fall in pixels.
_ballFallingAnimation.From = _ballCenterPositionYPixels - _ballYOffsetPixels; // Start at the top-edge of the wheel.
_ballFallingAnimation.To = _ballCenterPositionYPixels - (_ballYOffsetPixels * Constants.BallFallPercent);
// Duration of fall in seconds - same as rotation duration.
_ballFallingAnimation.Duration = _ballSpinningAnimation1.Duration;
// Ball spinning animation 2.
if (_ballSpinningAnimation2 == null)
{
// Initialize the ball spinning animation - it is a clone of the second wheel spinning animation.
_ballSpinningAnimation2 = _wheelSpinningAnimation2.Clone();
Storyboard.SetTargetName(_ballSpinningAnimation2, Constants.BallRotateTransformName);
Storyboard.SetTargetProperty(_ballSpinningAnimation2, new PropertyPath(RotateTransform.AngleProperty));
_ballStoryBoard.Children.Add(_ballSpinningAnimation2); // Add the animation to the story board.
}
// Begin time - begins after the first ball spinning animation.
_ballSpinningAnimation2.BeginTime = TimeSpan.FromSeconds(ballSpinningDuration.TotalSeconds);
// Ball sound.
if (_ballMediaTimeLine == null)
{
_ballMediaTimeLine = new MediaTimeline();
//_ballMediaTimeLine.SpeedRatio = Constants.BallSpeedRatio;
_ballMediaTimeLine.FillBehavior = FillBehavior.Stop;
_ballMediaTimeLine.Source = new Uri(Directory.GetCurrentDirectory() + Constants.BallAudioFile, UriKind.Relative);
Storyboard.SetTarget(_ballMediaTimeLine, _ballMediaElement);
_ballStoryBoard.Children.Add(_ballMediaTimeLine);
}
//_ballMediaTimeLine.Duration = TimeSpan.FromSeconds(ballSpinningDuration.TotalSeconds * Constants.BallSpeedRatio);
_ballMediaTimeLine.Duration = TimeSpan.FromSeconds(ballSpinningDuration.TotalSeconds);
_ballControl.Visibility = Visibility.Visible;
_ballStoryBoard.Begin(_ballControl, true); // Start the story board.
OnBallTossed?.Invoke(true); // Publish the status of the ball.
}
catch (Exception ex)
{
throw new Exception("RouletteBall.TossBall(): " + ex.ToString());
}
}