The scroll_event signal is emitted when a button in the 4 to 7 range is pressed.
Wheel mice are usually configured to generate button press events for buttons 4 and 5 when the wheel is turned.
To receive this signal, the Window associated to the widget needs to enable the SCROLL_MASK mask.
This signal will be sent to the grab widget if there is one.
| event |
the EventScroll which triggered this signal. |
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true to stop other handlers from being invoked for the event. false to propagate the event further. |