Cefsharp: Feature Request - Add Print preview (WinForms only)

[29683747]

Feature Request - quick print and print preview

[amaitland]

CEF has yet to implement print preview, there is an open PR you can track the progress there https://bitbucket.org/chromiumembedded/cef/pull-requests/126

There is no quick print functional as part of the CEF API.

[29683747]

Thank you. I just wanted to implement such a function: brower.print ('printName', pageNumber) , and do not display the print dialog.

[amaitland]

Print Preview support has been added in CEF with commit https://bitbucket.org/chromiumembedded/cef/commits/1669c0afbd121be45c41126ef5d09f44768e0e0a

Pass the --enable-print-preview command-line flag to enable.

I don't see any CEF API changes, so it looks like it's either enabled or disabled via a command line arg.

Should be included in version 77

[amaitland]

master has been upgraded to CEF 77.1.3+gf0a1c44+chromium-77.0.3865.90

I've added CefSettings.EnablePrintPreview to make appending the command line arg easier.

[amaitland]

https://bitbucket.org/chromiumembedded/cef/issues/2867/save-as-pdf-is-not-working-in-pdf-viewer suggests that saving a pdf when print preview is enabled is not working.

[amaitland]

Print preview only appears to be working in WinForms, in WPF the print dialog is displayed instead of the print preview.

Testing with cef_binary_79.1.35+gfebbb4a+chromium-79.0.3945.130_windows32_client using the following command line args and I can reproduce the problem, so appears to be a bug in CEF.

cefclient --multi-threaded-message-loop --off-screen-rendering-enabled --enable-gpu --enable-print-preview

I've commented https://bitbucket.org/chromiumembedded/cef/issues/123/add-support-for-print-preview#comment-55944942 and will see what response I get.

[amaitland]

Print preview is only available in WinForms see https://bitbucket.org/chromiumembedded/cef/issues/123/add-support-for-print-preview#comment-55952406 for official response from CEF maintainer.