COMPDF_GotoPage works sometimes

chromeball

First off, I'm using v3.6.6.782 of the DLL.

I have a function that loads a PDF from a stream, no problems here:

Code

LoadFromStream(pStream);

If in the same function I try to jump to a page number, it appears to ignore the page number request:

Code

LoadFromStream(pStream);
CommandEx(COMPDF_GotoPage, 5);

If I let the user initiate the GotoPage via a GUI element, it does work. I'm guessing here that LoadFromStream is asynchronous and that while WPViewPDF is doing its stuff it ignores some commands like page navigation?

Can you clarify under what circumstances certain commands like this one won't work, by design? I don't see that documented anywhere.

support

Hi,

Yes, its asynchronous. You woill need to call the goto after a delay.
You can use a timer to execute it.

It is possible to access the pages at random numbers, but the goto methods all require the text to be initialized first. That happens in a different thread.

chromeball

A timer is a bit of a hack. Is there an event or windows message that gets fired off when the other thread has finished rendering the PDF?

support

with recent version 3.08 I tried this:

WPViewPDF1.LoadFromFile(very_long_pdf.pdf');
WPViewPDF1.CommandEx(COMPDF_GotoPage, 29);

That appeared to always works to display page #30.