private void ImageExBase_EffectiveViewportChanged(FrameworkElement sender,
EffectiveViewportChangedEventArgs args)
{
var bringIntoViewDistanceX = args.BringIntoViewDistanceX;
var bringIntoViewDistanceY = args.BringIntoViewDistanceY;
var width = ActualWidth;
var height = ActualHeight;
if (bringIntoViewDistanceX <= width && bringIntoViewDistanceY <= height)
{
_isInViewport = true;
if (_lazyLoadingSource != null)
{
var source = _lazyLoadingSource;
_lazyLoadingSource = null;
SetSource(source);
}
}
else
{
_isInViewport = false;
}
}
private void ProgressBar_EffectiveViewportChanged(FrameworkElement sender, EffectiveViewportChangedEventArgs args)
{
if (sender is ProgressBar progressBar && progressBar.DataContext is ElementModel element)
{
SetProgressBarColor(progressBar, element);
}
}
private async void Block_EffectiveViewportChanged(FrameworkElement sender, EffectiveViewportChangedEventArgs args)
{
//System.Diagnostics.Debug.WriteLine("Bring into view distance: " + (sender.ActualHeight + args.EffectiveViewport.Y) + " item index: " + Presenter.Children.IndexOf(sender));
if (sender.ActualHeight + args.EffectiveViewport.Y > 100)
{
await TranslateTokenAsync(sender as LoadingTextBlock);
}
}
private void Grid_EffectiveViewportChanged(FrameworkElement sender, EffectiveViewportChangedEventArgs args)
{
if (!_LoadingCalled && args.BringIntoViewDistanceY <= 0)
{
_LoadingCalled = true;
var vm = (DataContext as LiveInfomationPageViewModel);
vm.InitializeIchibaItems();
vm.InitializeLiveRecommend();
}
}
private async void Grid_EffectiveViewportChanged(FrameworkElement sender, EffectiveViewportChangedEventArgs args)
{
if (sender.DataContext != null && (!(sender.DataContext as ListedItem).ItemPropertiesInitialized) && (args.BringIntoViewDistanceX < sender.ActualHeight))
{
await Window.Current.CoreWindow.Dispatcher.RunIdleAsync((e) =>
{
App.CurrentInstance.ViewModel.LoadExtendedItemProperties(sender.DataContext as ListedItem, 80);
(sender.DataContext as ListedItem).ItemPropertiesInitialized = true;
});
}
}
private async void Grid_EffectiveViewportChanged(FrameworkElement sender, EffectiveViewportChangedEventArgs args)
{
if (sender.DataContext is ListedItem item && (!item.ItemPropertiesInitialized) && (args.BringIntoViewDistanceX < sender.ActualHeight))
{
await Window.Current.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Low, () =>
{
ParentShellPageInstance.FilesystemViewModel.LoadExtendedItemProperties(item, currentIconSize);
item.ItemPropertiesInitialized = true;
});
sender.CanDrag = FileList.SelectedItems.Contains(item); // Update CanDrag
}
}
private async void Grid_EffectiveViewportChanged(FrameworkElement sender, EffectiveViewportChangedEventArgs args)
{
if (sender.DataContext != null && (!(sender.DataContext as ListedItem).ItemPropertiesInitialized) && (args.BringIntoViewDistanceX < sender.ActualHeight))
{
await Window.Current.CoreWindow.Dispatcher.RunIdleAsync((e) =>
{
ParentShellPageInstance.FilesystemViewModel.LoadExtendedItemProperties(sender.DataContext as ListedItem, _iconSize);
(sender.DataContext as ListedItem).ItemPropertiesInitialized = true;
});
(sender as UIElement).CanDrag = FileList.SelectedItems.Contains(sender.DataContext as ListedItem); // Update CanDrag
}
}
private async void Icon_EffectiveViewportChanged(FrameworkElement sender, EffectiveViewportChangedEventArgs args)
{
var parentRow = Interacts.Interaction.FindParent <DataGridRow>(sender);
if ((!(parentRow.DataContext as ListedItem).ItemPropertiesInitialized) && (args.BringIntoViewDistanceX < sender.ActualHeight))
{
await Window.Current.CoreWindow.Dispatcher.RunIdleAsync((e) =>
{
App.CurrentInstance.ViewModel.LoadExtendedItemProperties(parentRow.DataContext as ListedItem);
(parentRow.DataContext as ListedItem).ItemPropertiesInitialized = true;
//sender.EffectiveViewportChanged -= Icon_EffectiveViewportChanged;
});
}
}
private async void Icon_EffectiveViewportChanged(FrameworkElement sender, EffectiveViewportChangedEventArgs args)
{
var parentRow = Interacts.Interaction.FindParent <DataGridRow>(sender);
if (parentRow.DataContext is ListedItem item &&
!item.ItemPropertiesInitialized &&
args.BringIntoViewDistanceX < sender.ActualHeight)
{
await Window.Current.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Low, () =>
{
ParentShellPageInstance.FilesystemViewModel.LoadExtendedItemProperties(parentRow.DataContext as ListedItem);
(parentRow.DataContext as ListedItem).ItemPropertiesInitialized = true;
//sender.EffectiveViewportChanged -= Icon_EffectiveViewportChanged;
});
}
}
Rect IEffectiveViewportChangedEventArgsResolver.MaxViewport(EffectiveViewportChangedEventArgs e) => e.MaxViewport;
private async void IllustrationThumbnailContainerItem_OnEffectiveViewportChanged(FrameworkElement sender, EffectiveViewportChangedEventArgs args)
{
var context = sender.GetDataContext <IllustrationViewModel>();
var preloadRows = Math.Clamp(App.AppViewModel.AppSetting.PreLoadRows, 1, 15);
if (args.BringIntoViewDistanceY <= sender.ActualHeight * preloadRows) // [preloadRows] element ahead
{
if (await context.LoadThumbnailIfRequired())
{
var transform = (ScaleTransform)sender.RenderTransform;
if (sender.IsFullyOrPartiallyVisible(this))
{
var scaleXAnimation = transform.CreateDoubleAnimation(nameof(transform.ScaleX), from: 1.1, to: 1, easingFunction: ImageSourceSetEasingFunction, duration: TimeSpan.FromSeconds(2));
var scaleYAnimation = transform.CreateDoubleAnimation(nameof(transform.ScaleY), from: 1.1, to: 1, easingFunction: ImageSourceSetEasingFunction, duration: TimeSpan.FromSeconds(2));
var opacityAnimation = sender.CreateDoubleAnimation(nameof(sender.Opacity), from: 0, to: 1, easingFunction: ImageSourceSetEasingFunction, duration: TimeSpan.FromSeconds(2));
UIHelper.CreateStoryboard(scaleXAnimation, scaleYAnimation, opacityAnimation).Begin();
}
else
{
transform.ScaleX = 1;
transform.ScaleY = 1;
sender.Opacity = 1;
}
}
return;
}
// small tricks to reduce memory consumption
switch (context)
{
case { LoadingThumbnail: true } :
private void IllustrationThumbnailContainerItem_OnEffectiveViewportChanged(FrameworkElement sender, EffectiveViewportChangedEventArgs args)
{
var context = sender.GetDataContext <IllustrationViewModel>();
if (args.BringIntoViewDistanceY <= sender.ActualHeight) // one element ahead
{
_ = context.LoadThumbnailIfRequired();
return;
}
// small tricks to reduce memory consumption
switch (context)
{
case { LoadingThumbnail: true } :
private void UserControl_EffectiveViewportChanged(FrameworkElement sender, EffectiveViewportChangedEventArgs args)
{
DistanceX = args.BringIntoViewDistanceX;
DistanceY = args.BringIntoViewDistanceY;
}
public static bool NeedsLoading(FrameworkElement sender, EffectiveViewportChangedEventArgs args)
{
return(args.BringIntoViewDistanceY < sender.ActualHeight * 1.5 && sender.DataContext != null);
}
double IEffectiveViewportChangedEventArgsResolver.BringIntoViewDistanceY(EffectiveViewportChangedEventArgs e) => e.BringIntoViewDistanceY;
private void Image_EffectiveViewportChanged(FrameworkElement sender, EffectiveViewportChangedEventArgs args)
{
}
private void CarouselRepeater_EffectiveViewportChanged(FrameworkElement sender, EffectiveViewportChangedEventArgs args)
{
Viewport = args.MaxViewport;
HorizontalSnapPointsChanged?.Invoke(this, EventArgs.Empty);
}
/// <summary> /// Gets the sum of translation in the Y-axis that is required to bring the FrameworkElement into view of each viewport containing the element. /// </summary> /// <param name="e">The requested <see cref="EffectiveViewportChangedEventArgs"/>.</param> /// <returns> /// The translation in the Y-axis that is required to bring the FrameworkElement into view of each viewport containing the element. /// </returns> public static double BringIntoViewDistanceY(this EffectiveViewportChangedEventArgs e) => Resolver.BringIntoViewDistanceY(e);
/// <summary> /// Gets the Rect representing the maximum effective viewport with the current viewport sizes. /// </summary> /// <param name="e">The requested <see cref="EffectiveViewportChangedEventArgs"/>.</param> /// <returns>The Rect representing the maximum effective viewport with the current viewport sizes.</returns> public static Rect MaxViewport(this EffectiveViewportChangedEventArgs e) => Resolver.MaxViewport(e);
private void DropShadowControl_EffectiveViewportChanged(FrameworkElement sender, EffectiveViewportChangedEventArgs args)
{
AlbumView album = sender.DataContext as AlbumView;
if (album == null || album.DontLoad || !ImageHelper.NeedsLoading(sender, args))
{
return;
}
LoadThumbnail(album);
}
private async void UserControl_EffectiveViewportChanged(FrameworkElement sender, EffectiveViewportChangedEventArgs args)
{
if (sender.DataContext is GridFolderView data && !data.ThumbnailLoaded &&
ImageHelper.NeedsLoading(sender, args))
{
await data.SetThumbnailAsync();
}
}