Hi All,
i'm testing tfgCollectionView with this rest resource : http://jsonplaceholder.typicode.com/photos

In this test my CollectionView Style has 1 fgImage and 1 fgLabel.
I get the RestResouce with a TRESTRequest.ExecuteAsync and it works perfectly.
When i've the ExecuteAsync CallBack i parse the JSON output string and i fill my Photos collection (TList).
I do this step with a separate Task because i've 5000 items ( more or less).

When i link data to the CollectionView i call fgCollectionViewGetItemCount and fgCollectionView1BindItem.
If i bind only the fgLabel all works perfectly.
My problem is link the tfgImage to the thumbnail.
I post my code:

procedure TFramePhoto.fgCollectionView1BindItem(Sender: TObject;const AIndex: Integer; const AStyle: string; const AItem: TfgItemWrapper);
VAR Item:TPhotoData;
begin
  TRY
    Item:=RestPhotos.Items[AIndex];

    AItem.GetControlByLookupName<TfgLabel>('LblTitle').Text := Item.Ftitle;
    TfgAssetsManager.Current.AddBitmapFromUrlAsync(Item.FalbumId, Item.FthumbnailUrl,
    procedure (const AResultCode: Integer; const AResultMessage: string) begin
      AItem.GetControlByLookupName<TfgImage>('ImgAlbum').ImageName := Item.FalbumId;
    end);

  EXCEPT ON E:EXCEPTION DO
    FGX.Log.TfgLog.Log(TfgLogLevel.Debug,'fgCollectionView1BindItem ' + e.Message);
  END;
end;
 

Actually i'm saving the images in assets but i think it is a bad idea...
Can you suggest a best practice for this scenario ?

Thanks a lot guys,
Best Regards.

 

 

Edited July 13, 20205 yr by Luke

if not TfgAssetsManager.Current.Contains(Item.FalbumId) then
   TfgAssetsManager.Current.AddBitmapFromUrlAsync(Item.FalbumId, Item.FthumbnailUrl);
AItem.GetControlByLookupName<TfgImage>('ImgAlbum').ImageName := Item.FalbumId;

Try it!

I think Item.FalbumId not uniq field for records, it needs to be replaced by Item.Id.

Edited July 13, 20205 yr by knsg12

Hi Knsg12,
you are right...
AlbumId is not unique... excuse me.
I check better if now it is solved.

Thanks a lot,
Luke.

Hi All,
now my demo works better, thanks Knsg12.
However i've seen that TfgAssetsManager.Current.AddBitmapFromUrlAsync take a lot of time ( 20 - 30 seconds ) to download the thumbnail from  'https://via.placeholder.com/150/92c952'.

I've tried also to update your demo AsyncBitmapAssetDemo and i've replaced your sample url with mine.
The first execution take 20 second, the nexts less than 1 second.
How could be possibile ?
Many thanks guys for your support.
 

When you query a picture for the first time, it uploads it and save to Assets, the next time it will no longer upload a picture. And your fgimage always geting pic from Assets.

Hi Knsg12, thanks for support.
I will do more tests and i will close the post if solved.
Thanks a lot.