Cannot get GtkKeySnoopFunc to trigger

[gonzobrains]

Hi,

I've written an app based on the cefclient for Linux (using GTK). I want to intercept unwanted keys and block them, but I cannot seem to get my snooper function to be triggered using the gtk_key_snooper_install() method.

Has anyone tried this before? Any ideas?

Thanks,
gonzobrains

[magreenblatt]

Use CefKeyboardHandler::OnPreKeyEvent.

[gonzobrains]

Hi again,

Thanks for the reply. I determined that the key snooper function was getting called but only when my splash screen was active. After I hid the splashscreen the snooper wouldn't get triggered when my "main" screen was up. I have no idea why but I will try your suggestion.

If I use CefKeyboardHandler::OnPreKeyEvent will I be able to catch all key events entered and selectively allow/disallow them?

Thanks,
Jeff

[magreenblatt]

If I use CefKeyboardHandler::OnPreKeyEvent will I be able to catch all key events entered and selectively allow/disallow them?

Yes, if the browser has focus.

[gonzobrains]

My intention is to make the browser full screen and prevent the browser from losing focus (i.e., kiosk mode). I need to trap all key events and deny any undesirable ones, especially those that would cause the browser to lose focus (i.e., task switching, print screen, etc.). Can I use this method for that?

[magreenblatt]

It probably won't let you catch keyboard combinations usually handled by the WM. You'll likely need to hook the WM for that (or maybe the WM supports a kiosk-style mode?).

[gonzobrains]

That's why I was trying to get the GTK key snooping to work. Maybe I need to do this at the X-Windows level?