gobject:object, common-lisp:standard-object, common-lisp:t

None

The purpose of the gdk:display-manager singleton object is to offer notification when displays appear or disappear or the default display changes. You can use the gdk:display-manager-get function to obtain the gdk:display-manager singleton, but that should be rarely necessary. Typically, initializing GTK opens a display that you can work with without ever accessing the gdk:display-manager object.

The GDK library can be built with support for multiple backends. The gdk:display-manager object determines which backend is used at runtime.

The "display-opened" signal

lambda (manager display)    :run-last      

manager

The gdk:display-manager object on which the signal is emitted.

display

The opened gdk:display object.

The signal is emitted when a display is opened.