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Hello Antoine.

I think there is not a built-in solution in YUI.

You may give a look at the following stackoverflow thread:
http://stackoverflow.com/questions/9238 ... pg-png-pdf

Hope that helps,
IceBox

Hello Antoine.

It seems there is not a built-in solution in YUI to export the charts in PDF.

Stackoverflow users suggested in that thread a few tools.

Of course your mileage may vary.

Regards,
IceBox

Hello Antoine.

As stated in the docs [1], based on device and browser capabilities, Charts leverages SVG, HTML Canvas and VML to render its graphical elements.

(That means a chart may be a canvas).

An example I found in that thread how to convert an image it is canvas2image [2].
I suppose there are other tools converting from SVG or VML.

I gave you a general starting point because the solution depends on the app architecture and it is not related directly to YUI.

Generally speaking, your approach may be feasable: I mean, creating on the frontend an image, transfering it to the server side and processing it to a pdf file.

However, maybe, the roundtrip would be shorter if the pdf would be generated directly on the server side.

My two cents,
IceBox

[1] http://yuilibrary.com/yui/docs/charts/
[2] http://www.nihilogic.dk/labs/canvas2image/