public VirtualizingItemsControl()
{
ItemsPanel = new ItemsPanelTemplate(new FrameworkElementFactory(typeof(VirtualizingStackPanel)));
string template = @"
<ControlTemplate xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation'>
<Border
BorderThickness='{TemplateBinding Border.BorderThickness}'
Padding='{TemplateBinding Control.Padding}'
BorderBrush='{TemplateBinding Border.BorderBrush}'
Background='{TemplateBinding Panel.Background}'
SnapsToDevicePixels='True'>
<ScrollViewer
Padding='{TemplateBinding Control.Padding}'
Focusable='False'>
<ItemsPresenter
SnapsToDevicePixels='{TemplateBinding UIElement.SnapsToDevicePixels}'/>
</ScrollViewer>
</Border>
</ControlTemplate>";
Template = (ControlTemplate)XamlReader.Parse(template);
ScrollViewer.SetCanContentScroll(this, true);
ScrollViewer.SetVerticalScrollBarVisibility(this, ScrollBarVisibility.Auto);
ScrollViewer.SetHorizontalScrollBarVisibility(this, ScrollBarVisibility.Auto);
VirtualizingPanel.SetCacheLengthUnit(this, VirtualizationCacheLengthUnit.Page);
VirtualizingPanel.SetCacheLength(this, new VirtualizationCacheLength(1));
VirtualizingPanel.SetIsVirtualizingWhenGrouping(this, true);
}
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
ControlGameView = Template.FindName("PART_ControlGameView", this) as Control;
if (ControlGameView != null)
{
BindingTools.SetBinding(ControlGameView,
Control.DataContextProperty,
mainModel,
nameof(DesktopAppViewModel.SelectedGameDetails));
}
ListGames = Template.FindName("PART_ListGames", this) as ExtendedListBox;
if (ListGames != null)
{
SetListGamesBinding();
BindingTools.SetBinding(ListGames,
ExtendedListBox.SelectedItemProperty,
mainModel,
nameof(DesktopAppViewModel.SelectedGame),
BindingMode.TwoWay);
BindingTools.SetBinding(ListGames,
ExtendedListBox.SelectedItemsListProperty,
mainModel,
nameof(DesktopAppViewModel.SelectedGamesBinder),
BindingMode.TwoWay);
ScrollToSelectedBehavior.SetEnabled(ListGames, true);
if (!DesignerProperties.GetIsInDesignMode(this))
{
ListGames.InputBindings.Add(new KeyBinding(mainModel.EditSelectedGamesCommand, mainModel.EditSelectedGamesCommand.Gesture));
ListGames.InputBindings.Add(new KeyBinding(mainModel.RemoveSelectedGamesCommand, mainModel.RemoveSelectedGamesCommand.Gesture));
ListGames.InputBindings.Add(new KeyBinding(mainModel.StartSelectedGameCommand, mainModel.StartSelectedGameCommand.Gesture));
}
ListGames.SelectionMode = SelectionMode.Extended;
VirtualizingPanel.SetCacheLengthUnit(ListGames, VirtualizationCacheLengthUnit.Item);
VirtualizingPanel.SetCacheLength(ListGames, new VirtualizationCacheLength(5));
VirtualizingPanel.SetScrollUnit(ListGames, ScrollUnit.Pixel);
VirtualizingPanel.SetIsVirtualizingWhenGrouping(ListGames, true);
VirtualizingPanel.SetVirtualizationMode(ListGames, VirtualizationMode.Recycling);
}
ControlTemplateTools.InitializePluginControls(
mainModel.Extensions,
Template,
this,
SDK.ApplicationMode.Desktop,
mainModel,
$"{nameof(DesktopAppViewModel.SelectedGameDetails)}.{nameof(GameDetailsViewModel.Game)}.{nameof(GameDetailsViewModel.Game.Game)}");
}
/// <summary>
/// Updates ItemsOwner object
/// </summary>
private void Initialize_ItemsOwner()
{
ItemsOwner = new VirtualizingStackPanel
{
Width = this.Width,
Height = this.Height,
FocusVisualStyle = null,
};
VirtualizingPanel.SetIsVirtualizing(ItemsOwner, true);
VirtualizingPanel.SetCacheLengthUnit(ItemsOwner, VirtualizationCacheLengthUnit.Item);
VirtualizingPanel.SetCacheLength(ItemsOwner, new VirtualizationCacheLength(2));
VirtualizingPanel.SetVirtualizationMode(ItemsOwner, VirtualizationMode.Recycling);
UpdateFrameworkElement(ItemsOwner, RenderSize, new Rect(RenderSize));
ChildrenGrid.Children.Add(ItemsOwner);
}
