/// <summary>
/// Sets the position of the given caption on a grid.
/// </summary>
/// <param name="t">The caption texblock to set the position of.</param>
private void SetCaptionPosition(CaptionTextBlock t)
{
GridLocation l = GridLocation.GetGridLocation(t.Caption.Location);
Grid.SetRow(t, l.Row);
Grid.SetRowSpan(t, l.RowSpan);
Grid.SetColumn(t, l.Column);
Grid.SetColumnSpan(t, l.ColumnSpan);
}
/// <summary>
/// Adds an emotive caption to this MediaControl.
/// </summary>
/// <param name="c">The Caption to add.</param>
public void AddCaption(Caption c)
{
//Create a new CaptionTextBlock with a unique name in the form "ItemXX"
CaptionTextBlock t = new CaptionTextBlock(c, "Item" + CaptionGrid.Children.Count);
int captionIndex = CaptionGrid.Children.Add(t);
SetCaptionPosition(t);
//Give the control a name so that it can be used by the storyboard.
this.RegisterName(t.Name, t);
//Create animation for visibility
ObjectAnimationUsingKeyFrames visibilityAnimation = new ObjectAnimationUsingKeyFrames
{
Duration = TimeSpan.FromSeconds(c.Duration),
BeginTime = TimeSpan.FromSeconds(c.Begin),
};
//Set visibility keyframes
visibilityAnimation.KeyFrames.Add(new DiscreteObjectKeyFrame(Visibility.Visible, KeyTime.FromPercent(0)));
visibilityAnimation.KeyFrames.Add(new DiscreteObjectKeyFrame(Visibility.Collapsed, KeyTime.FromPercent(1)));
//Bind animation to property
Storyboard.SetTargetName(visibilityAnimation, t.Name);
Storyboard.SetTargetProperty(visibilityAnimation, new PropertyPath(TextBlock.VisibilityProperty));
Storyboard.Children.Add(visibilityAnimation);
foreach (CaptionWord w in c.Words)
{
//Skip words with no emotion in them
if (w.Emotion == Emotion.None || w.Emotion == Emotion.Unknown)
{
continue;
}
WordAnimation a = WordAnimationFactory.CreateWordAnimation(w, t);
a.AddToMediaPlayer(Storyboard, t);
}
}
