Emitted when the client application get the set_cursor_location.
Implement the member function IBusPanelServiceClass::set_cursor_location in extended class to receive this signal.
Argument user_data is ignored in this function.
| x |
X coordinate of the cursor. |
| y |
Y coordinate of the cursor. |
| w |
Width of the cursor. |
| h |
Height of the cursor. |