Creating New Layers
Creating a new map layer is a great way to achieve a more custom, performant, map design. For example, it might be used to display a scale bar, or overlay a grid.
Check the Plugins List for layers that already implement the behaviour you wish to replicate.
1. Creating A Layer Widget
It starts with a normal StatelessWidget
or StatefulWidget
, which then starts its widget tree with a widget dependent on whether the layer is designed to be either 'mobile' or 'static', depending on the purpose of the layer. For more information, see Mobile vs Static Layers.
2. Hooking Into Inherited State
Then, there are three possible methods that could be used to retrieve separate 'aspects' of the state of the map.
Calling these inside a build
method will also cause the layer to rebuild automatically when the depended-on aspects change.
Using these methods will restrict this widget to only being usable inside the context of a FlutterMap
.