/////////////////////////////////////////////////////
// Private Methods
/////////////////////////////////////////////////////
private void drillDown()
{
_currentLayer++;
// create new layer if not exist
if (_currentLayer > _imageCarousels.Count)
{
_currentCarousel = new ImageCarousel();
_imageCarousels.Add(_currentCarousel);
Holder.Children.Add(_currentCarousel);
_currentCarousel.Start();
_currentCarousel.DrillAppear();
}
else
{
// get the current layer if exist
_currentCarousel = _imageCarousels[_currentLayer - 1];
_currentCarousel.DrillAppear();
}
// Drill down the next layer (need to check if it exist)
if (_currentLayer - 2 >= 0)
{
ImageCarousel imageCarousel = _imageCarousels[_currentLayer - 2];
imageCarousel.DrillDown();
}
}
// Drill up the current layer
private void drillUp()
{
if (_currentLayer > 1)
{
_currentLayer--;
_currentCarousel = _imageCarousels[_currentLayer - 1];
_currentCarousel.DrillUp();
// remove the last layer
if (_currentLayer + 1 <= _imageCarousels.Count)
{
ImageCarousel imageCarousel = _imageCarousels[_currentLayer];
imageCarousel.DrillDisappear();
}
}
}