Is it possible to show a spinner while a pdf is created with pdfhtml5

dait

Hi,

i wonder if there are some events like 'pdf.create.started' and 'pdf.create.done' to be able to show a spinner in the meantime. I have some Datatables where the creation of a PDF with pdfhtml5 of the buttons extension takes quit long. It would be nice to inform the user, that the creation is still in progress.

Thank you in advance!

allan

Currently this isn't a feature that is built into the library, but it is something I'm keen to add. I'm not sure yet when I'll get a chance to add it, but it is something that should be available in a future version.

Allan

dait

Thank you allan,

i have tried to insert custom events in buttons.html5.js like this:

$( document ).trigger( "dtb_createPdfStart" );
var pdf = window.pdfMake.createPdf( doc );
$( document ).trigger( "dtb_createPdfEnd" );

However the result is not satisfying. The triggers fire at the very end of the creation process.

As a workaround in the meantime i have found a hint(https://github.com/bpampuch/pdfmake/issues/280) to speed up the creation of larger PDFs by editing the pdfmake.js:

function flow(stream) {
  var state = stream._readableState;
  debug('flow', state.flowing);
  if (state.flowing) {
    do {
      var chunk = stream.read(Number.MAX_SAFE_INTEGER); // grab MAX_SAFE_INTEGER bytes
    } while (null !== chunk && state.flowing);
  }
}

Hope this helps.

allan

Cool - hope that gets merged in :-)

Allan