public void GoToNext()
{
if (PlayingSong != null && PlayingSong.Song.Items != null)
{
var index = PlayingSong.GetCurrentItemIndex();
var offset = PlayingSong.IsZero ? 0 : 1;
if (index + offset < PlayingSong.Song.Items.Count)
{
PlayingSong.CurrentSongItem = PlayingSong.Song.Items[index + offset];
}
HandleZeroOnMove();
SendEvent(PresentationEvents.Next, PlayingSong);
}
}
public void GoToPrevious()
{
if (PlayingSong != null && PlayingSong.Song != null && PlayingSong.Song.Items != null && !PlayingSong.IsZero)
{
var index = PlayingSong.GetCurrentItemIndex();
var offset = PlayingSong.IsZero ? 0 : 1;
if (index - offset >= 0)
{
PlayingSong.CurrentSongItem = PlayingSong.Song.Items[index - offset];
HandleZeroOnMove();
}
else
{
PlayingSong.IsZero = true;
}
SendEvent(PresentationEvents.Previous, PlayingSong);
}
}