Listen To Events

When the state of a MapCamera changes, because of an update to its position or zoom, for example, a MapEvent, which can be handled by you.

Catching All Events

There's two methods to catch all emitted MapEvents. These methods expose the raw MapEvent, and is recommended in cases where multiple events need to be caught, or there's no more specific callback method available in MapOptions (see Catching Specific Events).

  • Listening to a MapController's mapEventStream, which exposes events via a Stream

  • Specifying a callback method in MapOptions.onMapEvent

Catching Specific Events

If only a couple of events need to be caught, such as just an onTap handler, it is possible to avoid handling the raw Stream of MapEvents. Instead, MapOptions has callbacks available for the following events:

  • onTap

  • onLongPress

  • onPositionChanged

  • onPointerDown/onPointerUp/onPointerHover/onPointerCancel

The MapEventTap event may be emitted (or the onTap callback called) 250ms after the actual tap occurred, as this is the acceptable delay between the two taps in a double tap zoom gesture.

If this causes noticeable jank or a bad experience (for example, on desktop platforms), disable InteractiveFlag.doubleTapZoom:

options: MapOptions(
    interactiveFlags: ~InteractiveFlag.doubleTapZoom,

This disables the double tap handler, so the MapEventTap is emitted 'instantly' on tap.

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