private void _loadingStatusBar_ShowMoreResultsClick(object sender, RoutedEventArgs e)
{
var packageItems = _loader?.GetCurrent() ?? Enumerable.Empty <PackageItemListViewModel>();
UpdatePackageList(packageItems, refresh: true);
_loadingStatusBar.ItemsLoaded = _loader?.State.ItemsCount ?? 0;
var desiredVisibility = EvaluateStatusBarVisibility(_loader, _loader.State);
if (_loadingStatusBar.Visibility != desiredVisibility)
{
_loadingStatusBar.Visibility = desiredVisibility;
}
}
private async Task <IEnumerable <PackageItemListViewModel> > LoadNextPageAsync(IItemLoader <PackageItemListViewModel> currentLoader, CancellationToken token)
{
var progress = new Progress <IItemLoaderState>(
s => HandleItemLoaderStateChange(currentLoader, s));
// trigger loading
await currentLoader.LoadNextAsync(progress, token);
// run till first results are ready
for (var state = currentLoader.State;
state.LoadingStatus == LoadingStatus.Loading && state.ItemsCount == 0;
state = currentLoader.State)
{
token.ThrowIfCancellationRequested();
await currentLoader.UpdateStateAsync(progress, token);
}
return(currentLoader.GetCurrent());
}