public static void UpdateItemsLayout(this TCollectionView platformView, StructuredItemsView view)
{
if (view.ItemsLayout != null)
{
var itemSizingStrategy = view.ItemSizingStrategy.ToPlatform();
if (view.ItemsLayout is GridItemsLayout grid)
{
var orientation = grid.Orientation == ItemsLayoutOrientation.Horizontal;
var verticalItemSpacing = DPExtensions.ConvertToScaledPixel(grid.VerticalItemSpacing);
var horizontalItemSpacing = DPExtensions.ConvertToScaledPixel(grid.HorizontalItemSpacing);
platformView.LayoutManager = new GridLayoutManager(orientation, grid.Span, itemSizingStrategy, verticalItemSpacing, horizontalItemSpacing);
}
else if (view.ItemsLayout is LinearItemsLayout linear)
{
var orientation = linear.Orientation == ItemsLayoutOrientation.Horizontal;
var itemSpacing = DPExtensions.ConvertToScaledPixel(linear.ItemSpacing);
platformView.LayoutManager = new LinearLayoutManager(orientation, itemSizingStrategy, itemSpacing);
}
else
{
platformView.LayoutManager = new LinearLayoutManager(false);
}
platformView.SnapPointsType = (view.ItemsLayout as ItemsLayout).SnapPointsType.ToPlatform();
platformView.SelectionMode = (view as SelectableItemsView).SelectionMode.ToPlatform();
}
}
public void VerticalListMeasurement()
{
var itemsView = new StructuredItemsView();
var sizeRequest = itemsView.Measure(double.PositiveInfinity, double.PositiveInfinity);
Assert.That(sizeRequest.Request.Height, Is.EqualTo(Device.Info.ScaledScreenSize.Height));
Assert.That(sizeRequest.Request.Width, Is.EqualTo(Device.Info.ScaledScreenSize.Width));
}
public void HorizontalListMeasurement()
{
var itemsView = new StructuredItemsView();
itemsView.ItemsLayout = new LinearItemsLayout(ItemsLayoutOrientation.Horizontal);
var sizeRequest = itemsView.Measure(double.PositiveInfinity, double.PositiveInfinity);
Assert.That(sizeRequest.Request.Height, Is.EqualTo(Device.Info.ScaledScreenSize.Height));
Assert.That(sizeRequest.Request.Width, Is.EqualTo(Device.Info.ScaledScreenSize.Width));
}
public void BindingContextPropagatesLayouts()
{
var bindingContext = new object();
var itemsView = new StructuredItemsView();
itemsView.BindingContext = bindingContext;
var linearItemsLayout = new LinearItemsLayout(ItemsLayoutOrientation.Horizontal);
itemsView.ItemsLayout = linearItemsLayout;
// BindingContext is set when ItemsLayout is set
Assert.AreEqual(itemsView.BindingContext, linearItemsLayout.BindingContext);
// BindingContext is updated when BindingContext on ItemsView is changed
bindingContext = new object();
itemsView.BindingContext = bindingContext;
Assert.AreEqual(itemsView.BindingContext, linearItemsLayout.BindingContext);
}
public StructuredItemsViewController(StructuredItemsView structuredItemsView, ItemsViewLayout layout)
: base(structuredItemsView, layout)
{
}
public static void MapHeaderTemplate(StructuredItemsViewHandler <TItemsView> handler, StructuredItemsView itemsView)
{
handler.PlatformView.UpdateAdaptor(itemsView);
}
public static void MapItemSizingStrategy(StructuredItemsViewHandler <TItemsView> handler, StructuredItemsView itemsView)
{
handler.PlatformView.UpdateItemsLayout(itemsView);
}
public static void MapItemSizingStrategy(StructuredItemsViewHandler <TItemsView> handler, StructuredItemsView itemsView)
{
handler.UpdateLayout();
}
public static void MapItemsLayout(StructuredItemsViewHandler <TItemsView> handler, StructuredItemsView itemsView)
{
}
protected override void SetUpNewElement(TItemsView newElement)
{
_itemsView = newElement;
base.SetUpNewElement(newElement);
}
public static StructuredItemsView HeaderTemplate(this StructuredItemsView items, DataTemplate template)
{
items.HeaderTemplate = template;
return(items);
}
public static StructuredItemsView Header(this StructuredItemsView items, object header, DataTemplate template)
{
items.Header = header;
items.HeaderTemplate = template;
return(items);
}
public static StructuredItemsView Header(this StructuredItemsView items, object header)
{
items.Header = header;
return(items);
}
public static StructuredItemsView Footer(this StructuredItemsView items, object footer, DataTemplate template)
{
items.Footer = footer;
items.FooterTemplate = template;
return(items);
}
public EmptyItemAdaptor(ItemsView itemsView, IEnumerable items, DataTemplate template) : base(itemsView, items, template)
{
_structuredItemsView = itemsView as StructuredItemsView;
}
public static StructuredItemsView ItemsLayout(this StructuredItemsView items, IItemsLayout layout)
{
items.ItemsLayout = layout;
return(items);
}
public static StructuredItemsView ItemSizingStrategy(this StructuredItemsView items, ItemSizingStrategy strategy)
{
items.ItemSizingStrategy = strategy;
return(items);
}
public static void MapFooterTemplate(StructuredItemsViewHandler <TItemsView> handler, StructuredItemsView itemsView)
{
}
public static StructuredItemsView Footer(this StructuredItemsView items, object footer)
{
items.Footer = footer;
return(items);
}
public static void MapItemSizingStrategy(StructuredItemsViewHandler <TItemsView> handler, StructuredItemsView itemsView)
{
}
public static void MapFooterTemplate(StructuredItemsViewHandler <TItemsView> handler, StructuredItemsView itemsView)
{
(handler.Controller as StructuredItemsViewController <TItemsView>)?.UpdateFooterView();
}
