The GTK-Qt Theme Engine is a project allowing GTK to use Qt widget styles.
Gtk-Qt Theme Engine behaves like a normal GTK theme engine, but calls functions from Qt instead of doing the drawing itself.
Limitations:
· Due to an incompatibility between Qt and the GNOME window manager, some parts of GNOME will not be themed by Qt.
· The theme will run fine under GNOME, but the logout box and window border menus will appear blank.
· It appears that the only way to overcome this bug is by patching Qt itself.
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