contains a string, encapsulating the X and Y relative coordinates separated by ":", the direction of the scroll and the state of the modifier keys(Alt, Shift, Ctrl, etc)
Generated from button presses for the buttons 4 to 7. Wheel mice are usually configured to generate button press events for buttons 4 and 5 when the wheel is turned.
Event triggered when a scrollable control is scrolled (please check GTK documentation for more information).
Evaluating EventData like this :