/// <summary>
/// Adds a new collapsed product item to the top of products list.
/// </summary>
/// <param name="barcode"></param>
public void AddProduct(string barcode, WriteableBitmap bitmap)
{
if (RootGrid.Children.Count > MaxCount)
return;
if (ContainsProduct(barcode))
{
MoveProductItemToTop(GetProductItem(barcode));
return;
}
ProductItem productItem = new ProductItem(barcode, bitmap);
productItem.VerticalAlignment = VerticalAlignment.Bottom;
productItem.Tapped += (sender, e) =>
{
if (productItem.Product == null)
return;
OnProductSelected(productItem);
};
double y = -RootGrid.Children.Count * (ProductItem.DefaultHeight + ProductItem.Space);
((CompositeTransform)productItem.RenderTransform).TranslateY = y;
RootGrid.Children.Add(productItem);
if (RootGrid.Children.Count > MaxCount)
{
ProductItem itemToRemove = (ProductItem)RootGrid.Children.First();
itemToRemove.Hidden += (sender, e) =>
{
RootGrid.Children.Remove(itemToRemove);
//RootGrid.Children.OrderBy((item) =>
// {
// return ((ProductItem)item).Translation.Y;
// });
};
itemToRemove.Hide();
foreach (ProductItem item in RootGrid.Children)
item.SlideDown();
}
}
public void Open(ProductItem productItem)
{
GeneralTransform productItemTransform = this.TransformToVisual(productItem);
Point productItemPosition = productItemTransform.TransformPoint(new Point(0, ContentGrid.ActualHeight / 2));
openPosition = -productItemPosition.Y + 19; // Measured offset just better looking animation.
((CompositeTransform)ContentGrid.RenderTransform).TranslateY = openPosition;
FadeInSotryboard.Begin();
isOpen = true;
ContentGrid.IsHitTestVisible = isOpen;
if (productItem.Product != null)
{
this.Product = productItem.Product;
this.Bitmap = productItem.Bitmap;
}
PlWorkersCheck.Show(TimeSpan.FromSeconds(0.2));
PlRndCheck.Show(TimeSpan.FromSeconds(0.3));
PlRegisteredCheck.Show(TimeSpan.FromSeconds(0.4));
PlNotGlobalCheck.Show(TimeSpan.FromSeconds(0.5));
}
private void OnProductSelected(ProductItem productItem)
{
if (ProductSelected != null)
ProductSelected(productItem, new ProductEventArgs(productItem.Product));
}
/// <summary>
/// Moves product item to the top of the list with nice slide animation.
/// </summary>
/// <param name="productItem"></param>
private void MoveProductItemToTop(ProductItem productItem)
{
if (!RootGrid.Children.Contains(productItem))
return;
int aboveItemsCount = 0;
foreach (ProductItem item in RootGrid.Children)
if (item.Translation.Y < productItem.Translation.Y)
{
aboveItemsCount++;
item.SlideDown();
}
productItem.SlideUp(aboveItemsCount);
RootGrid.Children.Move((uint)RootGrid.Children.IndexOf(productItem), (uint)RootGrid.Children.Count - 1);
}
