private void RefreshItems()
{
if (boxContianer == null)
{
return;
}
BindListener();
var data = Items?.ToList();
var count = data == null ? 0 : data.Count();
var j = 0;
var removeItems = new List <int>();
for (int i = 0; i < boxContianer.Children.Count; i++)
{
var item = boxContianer.Children[i];
if (item is AddListBoxItem)
{
continue;
}
if (j >= count)
{
removeItems.Add(i);
j++;
continue;
}
(item as BookListBoxItem).Source = data[j];
j++;
}
if (removeItems.Count > 0)
{
for (int i = removeItems.Count - 1; i >= 0; i--)
{
boxContianer.Children.RemoveAt(removeItems[i]);
}
}
if (j >= count)
{
MoveActionButton();
return;
}
for (; j < count; j++)
{
var book = new BookListBoxItem();
book.Width = ItemWidth;
book.Height = ItemHeight;
book.OnAction += (_, item, e) =>
{
if (e == ActionEvent.NONE)
{
boxMenu?.Show(GetActionPosition(book));
return;
}
OnAction?.Invoke(this, item, e);
};
boxContianer.Children.Add(book);
book.Source = data[j];
}
MoveActionButton();
RefreshSize();
}
private Point GetActionPosition(BookListBoxItem item)
{
var p = item.TransformToVisual(this).TransformPoint(new Point(0, 0));
p.X += item.ActualWidth - 60;
p.Y += 30;
return(p);
}