private void SelectThumbnailBox(ThumbnailBox thumbnailBox)
{
if (_selectedThumbnailBox != thumbnailBox)
{
if (_selectedThumbnailBox != null)
{
_selectedThumbnailBox.UnselectThumbnail();
}
_selectedThumbnailBox = thumbnailBox;
_selectedThumbnailIndex = _thumbnailBoxList
.FindIndex(aThumbnailBox =>
aThumbnailBox == _selectedThumbnailBox);
_selectedThumbnailBox.SelectThumbnail();
}
}
private void AdvanceToThumbnailIndex(int increment)
{
if (_selectedThumbnailBox != null)
{
var newSelectedThumbnailIndex = _selectedThumbnailIndex + increment;
if ((newSelectedThumbnailIndex >= 0) &&
(newSelectedThumbnailIndex < _thumbnailBoxList.Count))
{
_selectedThumbnailBox.UnselectThumbnail();
_selectedThumbnailIndex = newSelectedThumbnailIndex;
_selectedThumbnailBox = _thumbnailBoxList[_selectedThumbnailIndex];
_selectedThumbnailBox.SelectThumbnail();
}
}
}