IconCache class
Per-map cache of rasterised marker icons, keyed by icon key, logical size and pixel ratio.
Keeps the maxEntries most recently used icons. Every rasterised image gets a unique PlatformIcon.key,
so a diff only re-sends a marker when its image really changed.
Properties
- epoch → int
-
Incremented by every clear: an icon obtained before is no longer the one the map would rasterise.
no setter
- hashCode → int
-
The hash code for this object.
no setterinherited
- length → int
-
no setter
- maxEntries → int
-
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
clear(
) → void - Empties the cache. Renders still in flight complete for their callers but are not cached.
-
lookup(
Object key, Size size, double pixelRatio) → PlatformIcon? - The cached icon, if any, which becomes the most recently used.
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
resolve(
{required Object key, required Widget child, required Size size, required double pixelRatio, BuildContext? context}) → Future< PlatformIcon> -
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Static Properties
- rendersInFlight → int
-
Icons being rasterised by every cache, for tests that wait for them.
no setter