private void OnContainerContentChanging(ListViewBase sender, ContainerContentChangingEventArgs args)
{
if (args.InRecycleQueue)
{
return;
}
var wallpaper = args.Item as Background;
var root = args.ItemContainer.ContentTemplateRoot as Grid;
var preview = root.Children[0] as ChatBackgroundPreview;
var content = root.Children[1] as Image;
var check = root.Children[2];
check.Visibility = wallpaper == ViewModel.SelectedItem ? Visibility.Visible : Visibility.Collapsed;
if (wallpaper.Document != null)
{
if (wallpaper.Type is BackgroundTypePattern pattern)
{
content.Opacity = pattern.Intensity / 100d;
preview.Fill = pattern.Fill;
}
else
{
content.Opacity = 1;
preview.Fill = null;
}
var small = wallpaper.Document.Thumbnail;
if (small == null)
{
return;
}
var file = small.File;
if (file.Local.IsDownloadingCompleted)
{
content.Source = UriEx.ToBitmap(file.Local.Path, wallpaper.Document.Thumbnail.Width, wallpaper.Document.Thumbnail.Height);
}
else if (file.Local.CanBeDownloaded && !file.Local.IsDownloadingActive)
{
content.Source = null;
_backgrounds[file.Id].Add(wallpaper);
ViewModel.ProtoService.DownloadFile(file.Id, 1);
}
}
else if (wallpaper.Type is BackgroundTypeFill fill)
{
content.Opacity = 1;
preview.Fill = fill.Fill;
content.Source = null;
}
}
public void UpdateFile(MessageViewModel message, File file)
{
var text = message.Content as MessageText;
if (text == null || !_templateApplied)
{
return;
}
var webPage = text.WebPage;
if (webPage == null)
{
return;
}
var small = webPage.Photo?.GetSmall();
if (small == null)
{
return;
}
if (small.Photo.Id != file.Id)
{
return;
}
if (file.Local.IsDownloadingCompleted)
{
double ratioX = (double)48 / small.Width;
double ratioY = (double)48 / small.Height;
double ratio = Math.Max(ratioX, ratioY);
var width = (int)(small.Width * ratio);
var height = (int)(small.Height * ratio);
Texture.Source = UriEx.ToBitmap(file.Local.Path, width, height);
}
else if (file.Local.CanBeDownloaded && !file.Local.IsDownloadingActive)
{
message.ProtoService.DownloadFile(file.Id, 1);
}
}
public void Handle(UpdateFile update)
{
var file = update.File;
if (!file.Local.IsDownloadingCompleted)
{
return;
}
if (_backgrounds.TryGetValue(update.File.Id, out List <Background> items))
{
this.BeginOnUIThread(() =>
{
foreach (var item in items)
{
item.UpdateFile(update.File);
var small = item.Document?.Thumbnail;
if (small == null)
{
continue;
}
var container = List.ContainerFromItem(item) as SelectorItem;
var root = container?.ContentTemplateRoot as Grid;
var content = root?.Children[1] as Image;
if (content == null)
{
continue;
}
content.Source = UriEx.ToBitmap(file.Local.Path, small.Width, small.Height);
}
});
}
}