Op zondag 27-01-2008 om 16:18 uur [tijdzone +0100], schreef Michael Van
Canneyt:
> Secondly:
> In general, the TDBImage should be more flexible about the kind
> of data it expects: it now requires that the first part of the
> blob stream is an ansistring with the extension of the image.
> This is of course not true unless the image was saved by TDBImage
> itself, but is not correct for other, legacy, data. For instance,
> the Borland TDataset writes a TGraphicHeader record to the stream
> before the actual image data (guess how I found out).
I wrote the current behavior, because it didn't work at all. So I came
up with this idea, since i wasn't aware of the precise header that
Delphi uses.
> I think that this can be easily fixed by adding an event handler
> 'OnGetImageFormat' to TDBImage, which, if set, should return this
> ansistring; if it is not set, the current behaviour remains.
> Similarly, an 'OnSetImageFormat' will write the type to the
> stream (if a write is needed at all).
>
> I think this is a simple change, and if the Lazarus devels agree,
> I can create a patch for it.
Go ahead offcourse although you should ask a lazarus-developer to commit
it. ;)
Joost.
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