The ::device-changed signal is emitted whenever a device has changed in the hierarchy, either slave devices being disconnected from their master device or connected to another one, or master devices being added or removed a slave device.
If a slave device is detached from all master devices
GdkDeviceType will change to
if it’s attached, it will change to
|Default handler:|| |
The default handler is called after the handlers added via
|The data is owned by the caller of the function.|