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the zoom speed using the mouse wheel can be adjusted #1289

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Merged
JaffaKetchup merged 2 commits into from
Jun 28, 2022
Merged

the zoom speed using the mouse wheel can be adjusted #1289

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ee92446
the zoom speed using the mouse wheel can be adjusted
mboe Jun 27, 2022
d45f3da
fixed formatting
mboe Jun 28, 2022
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2 changes: 2 additions & 0 deletions lib/flutter_map.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -253,6 +253,7 @@ class MapOptions {
/// his mouse. This is supported on web and desktop, but might also work well
/// on Android. A [Listener] is used to capture the onPointerSignal events.
final bool enableScrollWheel;
final double scrollWheelVelocity;

final double? minZoom;
final double? maxZoom;
Expand Down Expand Up @@ -309,6 +310,7 @@ class MapOptions {
this.pinchMoveWinGestures =
MultiFingerGesture.pinchZoom | MultiFingerGesture.pinchMove,
this.enableScrollWheel = true,
this.scrollWheelVelocity = 0.005,
this.minZoom,
this.maxZoom,
this.interactiveFlags = InteractiveFlag.all,
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4 changes: 3 additions & 1 deletion lib/src/gestures/gestures.dart
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Expand Up @@ -58,7 +58,9 @@ abstract class MapGestureMixin extends State<FlutterMap>
// Calculate new zoom level
final minZoom = mapState.options.minZoom ?? 0.0;
final maxZoom = mapState.options.maxZoom ?? double.infinity;
final newZoom = (mapState.zoom + pointerSignal.scrollDelta.dy * -0.005)
final newZoom = (mapState.zoom -
pointerSignal.scrollDelta.dy *
mapState.options.scrollWheelVelocity)
.clamp(minZoom, maxZoom);
// Calculate offset of mouse cursor from viewport center
final List<dynamic> newCenterZoom = _getNewEventCenterZoomPosition(
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