/// <summary>
/// Handles the event which occurs when the selected item has changed
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void CollectionViewCurrentChanged(object sender, EventArgs e)
{
CollectionView collectionView = (CollectionView)sender;
if (collectionView != null && collectionView.CurrentPosition >= 0 && collectionView.CurrentPosition <= _piePieces.Count)
{
PiePiece piece = _piePieces[collectionView.CurrentPosition];
DoubleAnimation a = new DoubleAnimation
{
To = 10,
Duration = new Duration(TimeSpan.FromMilliseconds(200))
};
piece.BeginAnimation(PiePiece.PushOutProperty, a);
}
}
/// <summary>
/// Handles the event which occurs just before a pie piece tooltip opens
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void PiePieceToolTipOpening(object sender, ToolTipEventArgs e)
{
PiePiece piece = (PiePiece)sender;
CollectionView collectionView = (CollectionView)CollectionViewSource.GetDefaultView(DataContext);
if (collectionView == null)
{
return;
}
// select the item which this pie piece represents
int index = (int)piece.Tag;
if (piece.ToolTip != null)
{
ToolTip tip = (ToolTip)piece.ToolTip;
tip.DataContext = collectionView.GetItemAt(index);
}
}
/// <summary>
/// Handles the MouseUp event from the individual Pie Pieces
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void PiePieceMouseUp(object sender, MouseButtonEventArgs e)
{
CollectionView collectionView = (CollectionView)CollectionViewSource.GetDefaultView(DataContext);
if (collectionView == null)
{
return;
}
PiePiece piece = sender as PiePiece;
if (piece == null)
{
return;
}
// select the item which this pie piece represents
int index = (int)piece.Tag;
collectionView.MoveCurrentToPosition(index);
}