Intercept browser close event before onbeforeunload

[me12]

Can you override/customise the CefBrowserHost::CloseBrowser(false) method somehow?

What I need is:
To stop the browser close event before the "onbeforeunload" event is triggered.

What I do at the moment is:
Override "CefLifeSpanHandler::DoClose()" and add custom close behaviour but that is too late since "onbeforeunload" has been called already.

Why I need this, is:
Because I am using a hughe framework that does something on the "onbeforeunload" event. And I only want that to happen when I actually close the browser, not when I intercept the close event in CEF3.

Btw: I am using the "cefsimple" client. All that window stuff, event messages, etc. is encapsulated there. And I would like to avoid implementing everything myself now, since this is the last little issue I am encountering.

Thank you already!

[magreenblatt]

What OS and CEF version?

[me12]

Windows 7 and CEF3 latest stable release.

[magreenblatt]

It would be best to create your own parent window and embed the CEF window as a child as demonstrated by the cefclient application. However, if you need a quick fix you can subclass the WndProc and handle WM_CLOSE yourself. See for example this.

[me12]

Awesome! That works wonderfully.

Thank you very much! (once again)