Only register mouse scroll when key is held down?

[Mythar]

What could be improved

I want to detect if CTRL key is pressed while using the mouse wheel (for zooming)

Why should this be improved

I tried to do this using the "KeyboardEvents" and also tried overriding the GameWidget's focusNode.
When any key is down - the onScroll event (ScrollDetector) is never called.

Risks

No response

More information

No response

Other

• Are you interested in working on a PR for this?

[spydon]

I don't think this is related to Flame, it can most likely be reproduced in pure Flutter. You could try reproducing it in Flutter and look on the Flutter issue tracker to see if you can find something about it there. If you do find something, please add it to this issue. :)

[Mythar]

Think i found the solution.
In the gesture_detector_builder.dart : applyMouseDetectors

onPointerSignal : Check for both PointerScrollEvent AND PointerScaleEvent

Test:
_TransformedPointerScrollEvent#2d5e3(position: Offset(719.0, 402.0), scrollDelta: Offset(-0.0, -100.0))
_TransformedPointerScaleEvent#f1527(position: Offset(719.0, 402.0))

EDIT: You could add:
void onScale(PointerScrollInfo info) {} to the ScrollDetector

If you are building for web only:

window.document.onMouseWheel.listen((event) => handleMouseWheelWeb(event));

void handleMouseWheelWeb(dynamic event) {
if (event.ctrlKey) {
event.preventDefault();
}
}