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Date Posted: 00:42:21 07/04/05 Mon
Author: David L. Bracken
Subject: Re: Error on Thumbnail creation
In reply to: Pierre 's message, "Re: Error on Thumbnail creation" on 12:51:58 05/17/05 Tue

Have you tried assigning the graphic to a TJpegGraphic first?
Such as:
MyGraphic := TJpegGraphic.create
MyGraphic.assign(Fpicture.Graphic);
FResizeTransform.Apply(MyGraphic);


hope this helps,
David L. Bracken


>Using the TThumbNailForm code as a template I am
>building a TDrawgrid into an app for viewing
>thumbnails.
>
>I don't use TFileListBox and TDirectoryListbox, but
>only a TListbox fill by my own.
>I have an EInvalidCast error on the DrawGridDrawCell
>[Exactly with FResizeTransform.Apply(FPicture.Graphic
>as TDibGraphic );]
>
>This error doesn't occur with TFileListBox.
>Is TFileListBox the only way to wath thumbnail ?
>Please Help.
>
>Thanks.

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