This is an event signal, fired when the connected widget picks up a GDK_MOTION_NOTIFY event. Motion notify events are triggered when the mouse pointer moves across the screen. There are a great many of them, which has given rise to several different kinds of GdkEventMask aiming to minimise the amount that are captured.

See also: "event".

Callback function

bool callback(GtkWidget widget, GdkEvent motion_notify);

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