// This method fetches the whole ImageRecord that a user taps on and then passes it to the delegate
public override void ItemSelected(UICollectionView collectionView, NSIndexPath indexPath)
{
// If the user has already tapped on a thumbnail, prevent them from tapping any others
if (controller.lockSelectThumbnail)
{
return;
}
else
{
controller.lockSelectThumbnail = true;
}
// Starts animating the thumbnail to indicate it is loading
controller.ImageCollection.SetLoadingFlag(indexPath, true);
// Uses convenience API to fetch the whole image record associated with the thumbnail that was tapped
CKRecordID userSelectedRecordID = controller.ImageCollection.GetRecordId(indexPath);
controller.PublicCloudDatabase.FetchRecord(userSelectedRecordID, (record, error) => {
// If we get a partial failure, we should unwrap it
if (error != null && error.Code == (long)CKErrorCode.PartialFailure)
{
CKErrorInfo info = new CKErrorInfo(error);
error = info[userSelectedRecordID];
}
Error errorResponse = controller.HandleError(error);
switch (errorResponse)
{
case Error.Success:
controller.ImageCollection.SetLoadingFlag(indexPath, false);
Image selectedImage = new Image(record);
InvokeOnMainThread(() => {
controller.MasterController.GoTo(controller, selectedImage);
});
break;
case Error.Retry:
Utils.Retry(() => {
controller.lockSelectThumbnail = false;
ItemSelected(collectionView, indexPath);
}, error);
break;
case Error.Ignore:
Console.WriteLine("Error: {0}", error.Description);
string errorTitle = "Error";
string errorMessage = "We couldn't fetch the full size thumbnail you tried to select, try again";
string dismissButton = "Okay";
UIAlertController alert = UIAlertController.Create(errorTitle, errorMessage, UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create(dismissButton, UIAlertActionStyle.Cancel, null));
InvokeOnMainThread(() => controller.PresentViewController(alert, true, null));
controller.ImageCollection.SetLoadingFlag(indexPath, false);
controller.lockSelectThumbnail = false;
break;
default:
throw new NotImplementedException();
}
});
}
