Linux: Improve CEF X11 window behavior in cefclient GTK example

[magreenblatt]

Original report by me.

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Original issue 1417 created by magreenblatt on 2014-10-27T22:29:56.000Z:

The cefclient example application on Linux mixes GTK and X11 calls. This behaves incorrectly in some cases. For example

• Focus on the URL text field does not display correctly (gray highlight on selected text instead of the expected blue highlight).
• Popup windows are activated multiple times due to focus changes during creation (see use of |focus_pending_| in CefWindowX11).

There may be a better way to host the X11 window in GTK (gdk_window_foreign_new perhaps?). See issue comment 12.58 for related commentary.

[magreenblatt]

Comment 1. originally posted by magreenblatt on 2014-11-24T23:22:14.000Z:

A more generic embed approach might be using GtkSocket [1] which can host any control that implements the XEmbed protocol [2]. This is how Qt widgets can be hosted in GTK, for example.

[1] https://developer.gnome.org/gtk2/stable/GtkSocket.html
[2] http://www.freedesktop.org/Standards/xembed-spec

[magreenblatt]

• edited description
• set component to "SampleApps"