public async override void OnChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if ((args.Item is ImageItem imageItem))
{
await imageItem.TryLoadBitmapAsync();
}
}
private static void OnChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if (args.ItemContainer != null)
{
PokeUIElementZIndex(args.ItemContainer);
}
}
private async void FileList_ChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
// This resizes the items after the item template has been changed and reloaded
if (itemTemplateChanging)
{
itemTemplateChanging = false;
Behaviors.StretchedGridViewItems.ResizeItems(FileList);
}
if (args.ItemContainer == null)
{
GridViewItem gvi = new GridViewItem();
args.ItemContainer = gvi;
}
args.ItemContainer.DataContext = args.Item;
InitializeDrag(args.ItemContainer);
if (args.Item is ListedItem item && !item.ItemPropertiesInitialized)
{
args.ItemContainer.PointerPressed += FileListGridItem_PointerPressed;
args.ItemContainer.CanDrag = args.ItemContainer.IsSelected; // Update CanDrag
item.ItemPropertiesInitialized = true;
await ParentShellPageInstance.FilesystemViewModel.LoadExtendedItemProperties(item, currentIconSize);
}
}
private void OnChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
var typeName = args.Item.GetType().Name;
Debug.Assert(_typeToItemHashSetMapping.ContainsKey(typeName), "The type of the item used with DataTemplateSelectorBehavior must have a DataTemplate mapping");
var relevantHashSet = _typeToItemHashSetMapping[typeName];
// args.ItemContainer is used to indicate whether the ListView is proposing an
// ItemContainer (ListViewItem) to use. If args.Itemcontainer != null, then there was a
// recycled ItemContainer available to be reused.
if (args.ItemContainer != null)
{
if (args.ItemContainer.Tag.Equals(typeName))
{
// Suggestion matches what we want, so remove it from the recycle queue
relevantHashSet.Remove(args.ItemContainer);
#if ENABLE_DEBUG_SPEW
Debug.WriteLine($"Removing (suggested) {args.ItemContainer.GetHashCode()} from {typeName}");
#endif // ENABLE_DEBUG_SPEW
}
else
{
// The ItemContainer's datatemplate does not match the needed
// datatemplate.
// Don't remove it from the recycle queue, since XAML will resuggest it later
args.ItemContainer = null;
}
}
// If there was no suggested container or XAML's suggestion was a miss, pick one up from the recycle queue
// or create a new one
if (args.ItemContainer == null)
{
// See if we can fetch from the correct list.
if (relevantHashSet.Count > 0)
{
// Unfortunately have to resort to LINQ here. There's no efficient way of getting an arbitrary
// item from a hashset without knowing the item. Queue isn't usable for this scenario
// because you can't remove a specific element (which is needed in the block above).
args.ItemContainer = relevantHashSet.First();
relevantHashSet.Remove(args.ItemContainer);
#if ENABLE_DEBUG_SPEW
Debug.WriteLine($"Removing (reused) {args.ItemContainer.GetHashCode()} from {typeName}");
#endif // ENABLE_DEBUG_SPEW
}
else
{
// There aren't any (recycled) ItemContainers available. So a new one
// needs to be created.
var item = CreateSelectorItem(typeName);
args.ItemContainer = item;
#if ENABLE_DEBUG_SPEW
Debug.WriteLine($"Creating {args.ItemContainer.GetHashCode()} for {typeName}");
#endif // ENABLE_DEBUG_SPEW
}
}
// Indicate to XAML that we picked a container for it
args.IsContainerPrepared = true;
}
public async override void OnChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if (args != null && args.Item is DownloadItem item)
{
await item?.ImageItem?.TryLoadBitmapAsync();
}
}
protected virtual void OnChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if (args.ItemContainer == null)
{
if (sender is ListView)
{
args.ItemContainer = new TableAccessibleChatListViewItem(ViewModel.ProtoService);
}
else
{
args.ItemContainer = new ChatGridViewItem(ViewModel.ProtoService);
}
args.ItemContainer.Style = sender.ItemContainerStyle;
args.ItemContainer.ContentTemplate = sender.ItemTemplate;
args.ItemContainer.ContextRequested += Message_ContextRequested;
}
if (sender.ItemTemplateSelector != null)
{
args.ItemContainer.ContentTemplate = sender.ItemTemplateSelector.SelectTemplate(args.Item, args.ItemContainer);
}
args.IsContainerPrepared = true;
}
private void OnChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if (args.ItemContainer == null)
{
if (sender.ItemsPanel == VerticalStack)
{
args.ItemContainer = new ListViewItem();
}
else
{
args.ItemContainer = new GridViewItem
{
Margin = new Thickness(2)
};
}
if (sender.ItemTemplateSelector != null)
{
args.ItemContainer.ContentTemplate = sender.ItemTemplateSelector.SelectTemplate(args.Item, args.ItemContainer);
}
else
{
args.ItemContainer.ContentTemplate = sender.ItemTemplate;
}
args.ItemContainer.HorizontalContentAlignment = HorizontalAlignment.Stretch;
args.ItemContainer.VerticalContentAlignment = VerticalAlignment.Stretch;
_zoomer.ElementPrepared(args.ItemContainer);
}
args.IsContainerPrepared = true;
}
private void OnChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
var typeName = args.Item is ViewModels.Drawers.StickerViewModel sticker ? sticker.Format switch
{
StickerFormatTgs => "AnimatedItemTemplate",
StickerFormatWebm => "VideoItemTemplate",
_ => "ItemTemplate"
} : "ItemTemplate";
private void OnChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
var stickerSet = args.Item as StickerSetInfo;
var cover = stickerSet.GetThumbnail(out _, out bool animated);
var typeName = animated ? "AnimatedItemTemplate" : "ItemTemplate";
var relevantHashSet = _typeToItemHashSetMapping[typeName];
// args.ItemContainer is used to indicate whether the ListView is proposing an
// ItemContainer (ListViewItem) to use. If args.Itemcontainer != null, then there was a
// recycled ItemContainer available to be reused.
if (args.ItemContainer != null)
{
if (args.ItemContainer.Tag.Equals(typeName))
{
// Suggestion matches what we want, so remove it from the recycle queue
relevantHashSet.Remove(args.ItemContainer);
}
else
{
// The ItemContainer's datatemplate does not match the needed
// datatemplate.
// Don't remove it from the recycle queue, since XAML will resuggest it later
args.ItemContainer = null;
}
}
// If there was no suggested container or XAML's suggestion was a miss, pick one up from the recycle queue
// or create a new one
if (args.ItemContainer == null)
{
// See if we can fetch from the correct list.
if (relevantHashSet.Count > 0)
{
// Unfortunately have to resort to LINQ here. There's no efficient way of getting an arbitrary
// item from a hashset without knowing the item. Queue isn't usable for this scenario
// because you can't remove a specific element (which is needed in the block above).
args.ItemContainer = relevantHashSet.First();
relevantHashSet.Remove(args.ItemContainer);
}
else
{
// There aren't any (recycled) ItemContainers available. So a new one
// needs to be created.
var item = new ListViewItem();
item.ContentTemplate = _typeToTemplateMapping[typeName];
item.Style = sender.ItemContainerStyle;
item.Tag = typeName;
item.ContextRequested += StickerSet_ContextRequested;
args.ItemContainer = item;
}
}
// Indicate to XAML that we picked a container for it
args.IsContainerPrepared = true;
}
private void OnChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if (args.ItemContainer == null)
{
args.ItemContainer = new MultipleListViewItem(false);
args.ItemContainer.Style = List.ItemContainerStyle;
args.ItemContainer.ContentTemplate = List.ItemTemplate;
}
args.IsContainerPrepared = true;
}
private void OnChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if (args.ItemContainer == null)
{
args.ItemContainer = new TextListViewItem();
args.ItemContainer.Style = ScrollingHost.ItemContainerStyle;
}
args.ItemContainer.ContentTemplate = ScrollingHost.ItemTemplateSelector.SelectTemplate(args.Item);
args.IsContainerPrepared = true;
}
private void OnChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if (_needUpdate)
{
var root = ItemsPanelRoot as ItemsStackPanel;
if (root != null)
{
root.Orientation = Orientation;
_needUpdate = false;
}
}
}
private void ChatsList_ChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if (args.ItemContainer == null)
{
args.ItemContainer = new ChatsListViewItem(ChatsList);
args.ItemContainer.Style = ChatsList.ItemContainerStyle;
args.ItemContainer.ContentTemplate = ChatsList.ItemTemplate;
args.ItemContainer.ContextRequested += Chat_ContextRequested;
}
args.IsContainerPrepared = true;
}
protected override void OnChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if (args.ItemContainer == null)
{
args.ItemContainer = new TableListViewItem();
args.ItemContainer.Style = ScrollingHost.ItemContainerStyle;
}
args.ItemContainer.ContentTemplate = ScrollingHost.ItemTemplate;
args.IsContainerPrepared = true;
}
private void OnChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if (args.ItemContainer == null)
{
args.ItemContainer = new ListViewItem();
args.ItemContainer.Style = sender.ItemContainerStyle;
args.ItemContainer.ContentTemplate = sender.ItemTemplate;
args.ItemContainer.ContextRequested += Member_ContextRequested;
}
args.IsContainerPrepared = true;
}
public async override void OnChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if ((args.Item is ImageItem imageItem))
{
await imageItem.TryLoadBitmapAsync();
if (imageItem.Image.IsInHighlightList)
{
await imageItem.LoadAuthorInfoAsync();
}
}
}
private void AssociatedObject_ChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
var context = args.Item;
if (_map.Contains(context))
{
return;
}
Microsoft.Xaml.Interactivity.Interaction.ExecuteActions(context, Actions, null);
_map.Add(context);
}
private void OnChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if (args.ItemContainer == null)
{
args.ItemContainer = new GridViewItem();
args.ItemContainer.ContentTemplate = sender.ItemTemplate;
args.ItemContainer.Style = sender.ItemContainerStyle;
_zoomer.ElementPrepared(args.ItemContainer);
}
args.IsContainerPrepared = true;
}
private void ListView_ChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
Debug.WriteLine(args.ItemContainer);
var container = new ListViewItem();
//container.PointerPressed += Container_PointerPressed;
//container.PointerMoved += Container_PointerMoved;
//container.PointerReleased += Container_PointerReleased;
container.DragStarting += Container_DragStarting;
container.DropCompleted += Container_DropCompleted;
args.ItemContainer = container;
}
private void Listview_ChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if (args.ItemContainer != null)
{
return;
}
ListViewItem container = (ListViewItem)args.ItemContainer ?? new ListViewItem();
container.IsDoubleTapEnabled = true;
container.DoubleTapped += Container_DoubleTapped;
args.ItemContainer = container;
}
private void locationsListView_ChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if (args.ItemContainer != null)
{
return;
}
ListViewItem containerItem = new ListViewItem();
containerItem.PointerEntered += ContainerItem_PointerEntered;
containerItem.PointerExited += ContainerItem_PointerExited;
args.ItemContainer = containerItem;
}
private void ListView_ChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
var viewType = dataSource.GetItemViewType(args.ItemIndex);
var info = templateSelector.GetInfo(Element.Adapter, args.ItemIndex);
// Can we reuse the container?
if (args?.ItemContainer?.Tag is WrapperItem wrapper)
{
if (wrapper.ViewType == viewType)
{
if (args.ItemContainer is ListViewItem lvi)
{
wrapper.Control.Update(info);
lvi.Content = wrapper.Control;
lvi.InvalidateMeasure();
}
}
}
else
{
args.IsContainerPrepared = true;
var template = templateSelector.GetTemplate(Element.Adapter, args.ItemIndex);
var viewCell = template.CreateContent() as VirtualViewCell;
var container = new UwpControlWrapper(viewCell.View);
container.ViewCell = viewCell;
container.Update(info);
Unparent(container);
//args.IsContainerPrepared = true;
//c.Content = container;
var listViewItem = new ListViewItem();
listViewItem.Content = container;
args.ItemContainer = listViewItem;
args.ItemContainer.Tag = new WrapperItem
{
Control = container,
ViewType = viewType
};
args.IsContainerPrepared = true;
}
}
private void DownloadListView_ChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
// Do we already have an ItemContainer? If so, we're done here.
if (args.ItemContainer != null)
{
return;
}
ListViewItem containerItem = new ListViewItem();
// Show hover buttons
containerItem.PointerEntered += ContainerItem_PointerEntered;
containerItem.PointerExited += ContainerItem_PointerExited;
args.ItemContainer = containerItem;
}
private void OnChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if (args.ItemContainer == null)
{
args.ItemContainer = new GridViewItem();
args.ItemContainer.Style = sender.ItemContainerStyle;
args.ItemContainer.ContentTemplate = sender.ItemTemplate;
args.ItemContainer.ContextRequested += Sticker_ContextRequested;
if (ApiInfo.IsFullExperience || Windows.UI.ViewManagement.UIViewSettings.GetForCurrentView().UserInteractionMode == Windows.UI.ViewManagement.UserInteractionMode.Mouse)
{
_zoomer.ElementPrepared(args.ItemContainer);
}
}
args.IsContainerPrepared = true;
}
private async void FileList_ChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if (args.ItemContainer == null)
{
args.ItemContainer = new ListViewItem();
}
args.ItemContainer.DataContext = args.Item;
if (args.Item is ListedItem item && !item.ItemPropertiesInitialized)
{
args.ItemContainer.PointerPressed += FileListGridItem_PointerPressed;
InitializeDrag(args.ItemContainer);
args.ItemContainer.CanDrag = args.ItemContainer.IsSelected; // Update CanDrag
item.ItemPropertiesInitialized = true;
await ParentShellPageInstance.FilesystemViewModel.LoadExtendedItemProperties(item, currentIconSize);
}
}
private void GridView_ChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if (args.ItemContainer != null)
{
return;
}
GridViewItem container = (GridViewItem)args.ItemContainer ?? new GridViewItem();
container.PointerEntered -= ItemContainer_PointerEntered;
container.PointerExited -= ItemContainer_PointerExited;
container.PointerEntered += ItemContainer_PointerEntered;
container.PointerExited += ItemContainer_PointerExited;
container.Tapped += Container_Tapped;
args.ItemContainer = container;
}
private void OnChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if (args.ItemContainer == null)
{
if (sender is ListView)
{
args.ItemContainer = new AccessibleChatListViewItem(ViewModel.ProtoService);
}
else
{
args.ItemContainer = new ChatGridViewItem(ViewModel.ProtoService);
}
args.ItemContainer.Style = sender.ItemContainerStyle;
}
args.ItemContainer.ContentTemplate = sender.ItemTemplateSelector.SelectTemplate(args.Item, args.ItemContainer);
args.IsContainerPrepared = true;
}
private void OnChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if (args.Item is ISessionService && (args.ItemContainer == null || args.ItemContainer is Controls.NavigationViewItem || args.ItemContainer is Controls.NavigationViewItemSeparator))
{
args.ItemContainer = new ListViewItem();
args.ItemContainer.Style = NavigationViewList.ItemContainerStyle;
args.ItemContainer.ContentTemplate = Resources["SessionItemTemplate"] as DataTemplate;
args.ItemContainer.ContextRequested += OnContextRequested;
}
else if (args.Item is RootDestination destination)
{
if (destination == RootDestination.Separator && args.ItemContainer is not Controls.NavigationViewItemSeparator)
{
args.ItemContainer = new Controls.NavigationViewItemSeparator();
}
else if (destination != RootDestination.Separator && args.ItemContainer is not Controls.NavigationViewItem)
{
args.ItemContainer = new Controls.NavigationViewItem();
args.ItemContainer.ContextRequested += OnContextRequested;
}
}
protected override void OnChoosingItemContainer(ListViewBase sender, ChoosingItemContainerEventArgs args)
{
if (args.ItemContainer == null)
{
args.ItemContainer = new TableListViewItem();
args.ItemContainer.Style = sender.ItemContainerStyle;
args.ItemContainer.ContextRequested += Member_ContextRequested;
if (sender.ItemTemplateSelector == null)
{
args.ItemContainer.ContentTemplate = sender.ItemTemplate;
}
}
if (sender.ItemTemplateSelector != null)
{
args.ItemContainer.ContentTemplate = sender.ItemTemplateSelector.SelectTemplate(args.Item, args.ItemContainer);
}
args.IsContainerPrepared = true;
}
private void PhotoCollectionViewer_ChoosingItemContainer(ListViewBase sender,
ChoosingItemContainerEventArgs args)
{
args.ItemContainer = args.ItemContainer ?? new GridViewItem();
var fadeIn = _compositor.CreateScalarKeyFrameAnimation();
fadeIn.Target = "Opacity";
fadeIn.Duration = TimeSpan.FromMilliseconds(_animationDuration);
fadeIn.InsertKeyFrame(0, 0);
fadeIn.InsertKeyFrame(1, 1);
fadeIn.DelayBehavior = AnimationDelayBehavior.SetInitialValueBeforeDelay;
fadeIn.DelayTime = TimeSpan.FromMilliseconds(_animationDuration * 0.125 * args.ItemIndex);
var fadeOut = _compositor.CreateScalarKeyFrameAnimation();
fadeOut.Target = "Opacity";
fadeOut.Duration = TimeSpan.FromMilliseconds(_animationDuration);
fadeOut.InsertKeyFrame(1, 0);
var scaleIn = _compositor.CreateVector3KeyFrameAnimation();
scaleIn.Target = "Scale";
scaleIn.Duration = TimeSpan.FromMilliseconds(_animationDuration);
scaleIn.InsertKeyFrame(0f, new Vector3(1.2f, 1.2f, 1.2f));
scaleIn.InsertKeyFrame(1f, new Vector3(1f, 1f, 1f));
scaleIn.DelayBehavior = AnimationDelayBehavior.SetInitialValueBeforeDelay;
scaleIn.DelayTime = TimeSpan.FromMilliseconds(_animationDuration * 0.125 * args.ItemIndex);
// animations set to run at the same time are grouped
var animationFadeInGroup = _compositor.CreateAnimationGroup();
animationFadeInGroup.Add(fadeIn);
animationFadeInGroup.Add(scaleIn);
// Set up show and hide animations for this item container before the element is added to the tree.
// These fire when items are added/removed from the visual tree, including when you set Visibilty
ElementCompositionPreview.SetImplicitShowAnimation(args.ItemContainer, animationFadeInGroup);
ElementCompositionPreview.SetImplicitHideAnimation(args.ItemContainer, fadeOut);
}
