Re: Another possible gb.poppler bug?

[Lee <t.lee.davidson@xxxxxxxxx>]

On 12/2/25 12:23 PM, gbWilly wrote:
> > You could determine if the document has embedded thumbnails, when it is loaded, by testing if a thumbnail for the first page is
> > found.
>
> The application AND example I posted already do that

No, they don't. Your application tests EACH AND EVERY page in succession and renders a thumbnail if needed. I suggested testing 
only the first page to determine if the entire document has embedded thumbnails.

> > If thumbnails are not embedded and self-rendering is needed, you could:
> >
> > Load up a generic, lightweight thumbnail for each page and then use IconView's Draw event to render an appropriate thumbnail, or
> > Use Tasks to generate the thumbnails.
>
> If I render them at 4 dpi it still takes a while.

By "them" do you mean render thumbnails for all pages? That is not what I suggested. My suggestion was to load up a generic, 
lightweight "placeholder" thumbnail; a thumbnail from a file in your project such as, perhaps, the Gambas logo. And then only 
when the "real" thumbnail is needed, indicated by a triggering of the IconView Draw event, render the thumbnail from the page. 
You would, of course, need to determine if the Draw event is due to the initial loading of the generic thumbnails. A boolean 
semaphore would work for that.


> It seems like I have to do it in chunks somehow, but during the rendering the application in non reactive!

So then, don't load them all at once.


P.S. @Benoît, it appears that the IconView Draw event is triggered merely by the mouse cursor hovering over the control. Is that 
by design? It seems unnecessary.


--
Lee

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