flutter_map Integration
Last updated
Last updated
© Luka Stillingfleet (JaffaKetchup)
Stores also have the method getTileProvider(). This is the point of integration with flutter_map, providing browse caching through a custom image provider, and can be used as so:
This method (and others) optionally take a FMTCTileProviderSettings. These configure the behaviour of the tile provider. Defaults to the settings specified in the , or the package default (see table below) if that is not specified.
FMTCTileProviderSettings can take the following arguments:
This enumerable contains 3 values, which are used to dictate which logic should be used to store and retrieve tiles from the store.
If you've got a value (such as a token or a key) in the URL's query parameters (the key-value pairs list found after the '?') that you need to keep secret or that changes frequently, make use of obscuredQueryParams.
Pass it the list of query keys who's values need to be removed/omitted/obscured in storage. For example, 'api_key' would remove the 'api_key', and any other characters until the next key-value pair, or the end of the URL, as seen below:
Since v3, FMTC relies on URL equality to find tiles within a store during browsing. This method is therefore necessary in cases where a token changes periodically.
A backport of this functionality to v6 is also available - see , and install it through GitHub: .
cacheFirst
Get tiles from the local cache if possible.
Only uses the Internet if it doesn't exist, or to update it if it has expired.
onlineFirst
Get tiles from the Internet if possible.
Updates every cached tile every time it is fetched (ignores expiry).
cacheOnly
Only get tiles from the local cache, and throw an error if not found.
Recommended for dedicated offline modes.
Determine the logic used during handling storage and retrieval of browse caching
CacheBehavior.cacheFirst
cachedValidDuration: Duration
Length of time a tile remains valid, after which it must be fetched again (ignored in onlineFirst mode)
const Duration(days: 16)
maxStoreLength: int
Maximum number of tiles allowed in a cache store (deletes oldest tile)
0: disabled
obscuredQueryParams: List<String>
[]: empty
behavior:
See
