Just a thought but why not just write the canvas data to a hidden form field and then process it with the form data? Do you really need to send it via ajax to be processed and then submit the form? I know it creates a Huge post object but you're still dealing with the same thing if you are sending it via ajax just with an extra step.
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Adam A. Gregory
Drupal Developer & Consultant
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skype: aagregory2
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On Tue, Nov 16, 2010 at 1:48 PM, Aaron Winborn <winborn@advomatic.com> wrote:

I'm creating an HTML5 canvas editor for a filefield widget, which uploads a canvas image, returning an FID to be stored in a textfield. Everything works, except that now I want to delay node submission until the canvas has a chance to save its work (assuming its associated 'Save' button hasn't yet been clicked).

I'm mostly there, thanks to some help from merlinofchaos. Currently, I save the work and return false on the submit/preview click, and trigger('submit') after the ajax call to save the canvas. However, it's not quite working -- the canvas saves properly, storing the new fid in the field, but the form is reloaded, rather than processing.

http://drupalbin.com/16680

Any ideas?

Thanks,
Aaron

--
Aaron Winborn

Advomatic, LLC
http://advomatic.com/

Drupal Multimedia available now!
http://www.packtpub.com/create-multimedia-website-with-drupal/book

My blog:
http://aaronwinborn.com/

-- 
Aaron Winborn

Advomatic, LLC
http://advomatic.com/

Drupal Multimedia available in September!
http://www.packtpub.com/create-multimedia-website-with-drupal/book

My blog:
http://aaronwinborn.com/