public void SetScrollMode(ItemsUpdatingScrollMode mode, bool force)
{
var panel = ItemsPanelRoot as ItemsStackPanel;
if (panel == null)
{
_pendingMode = mode;
_pendingForce = force;
return;
}
var scroll = ScrollingHost;
if (scroll == null)
{
_pendingMode = mode;
_pendingForce = force;
return;
}
if (mode == ItemsUpdatingScrollMode.KeepItemsInView && (force || scroll.VerticalOffset < 200))
{
Debug.WriteLine("Changed scrolling mode to KeepItemsInView");
panel.ItemsUpdatingScrollMode = ItemsUpdatingScrollMode.KeepItemsInView;
}
else if (mode == ItemsUpdatingScrollMode.KeepLastItemInView && (force || scroll.ScrollableHeight - scroll.VerticalOffset < 200))
{
Debug.WriteLine("Changed scrolling mode to KeepLastItemInView");
panel.ItemsUpdatingScrollMode = ItemsUpdatingScrollMode.KeepLastItemInView;
}
}
public static ItemsView ItemsUpdatingScrollMode(this ItemsView items, ItemsUpdatingScrollMode mode)
{
items.ItemsUpdatingScrollMode = mode;
return(items);
}
public ObservableCodeCollectionViewGallery(ItemsLayoutOrientation orientation = ItemsLayoutOrientation.Vertical,
bool grid = true, int initialItems = 1000, bool addItemsWithTimer = false, ItemsUpdatingScrollMode scrollMode = ItemsUpdatingScrollMode.KeepItemsInView)
{
var layout = new Grid
{
RowDefinitions = new RowDefinitionCollection
{
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Auto
},
new RowDefinition {
Height = GridLength.Star
}
}
};
IItemsLayout itemsLayout = grid
? new GridItemsLayout(3, orientation)
: new LinearItemsLayout(orientation) as IItemsLayout;
var itemTemplate = ExampleTemplates.PhotoTemplate();
var collectionView = new CollectionView {
ItemsLayout = itemsLayout, ItemTemplate = itemTemplate,
AutomationId = "collectionview", Header = "This is the header", ItemsUpdatingScrollMode = scrollMode
};
var generator = new ItemsSourceGenerator(collectionView, initialItems, ItemsSourceType.ObservableCollection);
var remover = new ItemRemover(collectionView);
var adder = new ItemAdder(collectionView);
var replacer = new ItemReplacer(collectionView);
var mover = new ItemMover(collectionView);
var inserter = new ItemInserter(collectionView);
layout.Children.Add(generator);
layout.Children.Add(remover);
Grid.SetRow(remover, 1);
layout.Children.Add(adder);
Grid.SetRow(adder, 2);
layout.Children.Add(replacer);
Grid.SetRow(replacer, 3);
layout.Children.Add(mover);
Grid.SetRow(mover, 4);
layout.Children.Add(inserter);
Grid.SetRow(inserter, 5);
layout.Children.Add(collectionView);
Grid.SetRow(collectionView, 6);
Content = layout;
if (addItemsWithTimer)
{
generator.GenerateEmptyObservableCollectionAndAddItemsEverySecond();
}
else
{
generator.GenerateItems();
}
}
public static T ItemsUpdatingScrollMode <T>(this T itemsview, ItemsUpdatingScrollMode itemsUpdatingScrollMode) where T : IRxItemsView
{
itemsview.ItemsUpdatingScrollMode = itemsUpdatingScrollMode;
return(itemsview);
}
