Rendertheme class
Main rendering theme engine that defines how map features are styled and drawn.
A RenderTheme processes styling rules to determine how ways, nodes, and other map features should be rendered at different zoom levels. It manages rule hierarchies, background colors, drawing levels, and zoom-dependent styling.
Key responsibilities:
- Rule processing and matching for map features
- Zoom level dependent styling management
- Drawing layer organization and ordering
- Background color and styling configuration
- Performance optimization through caching
Constructors
Properties
- baseStrokeWidth ↔ double
-
Base stroke width multiplier for all line rendering.
Applied as a scaling factor to all stroke widths in the theme.
getter/setter pair
- baseTextSize ↔ double
-
Base text size multiplier for all text rendering.
Applied as a scaling factor to all font sizes in the theme.
getter/setter pair
-
closedWayMatchingCache
↔ Cache<
ITagCollection, ZoomlevelRange> -
LRU cache for closed way (area) rendering instruction matches.
latefinal
- forHash ↔ String
-
Hash string used for theme identification and caching.
latefinal
- hasBackgroundOutside → bool?
-
Whether the theme defines a background color for areas outside the map.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- mapBackground → int?
-
Background color for the map area (ARGB format).
final
- mapBackgroundOutside → int?
-
Background color for areas outside the map bounds (ARGB format).
final
- maxLevels → int
-
Maximum number of drawing levels used by this theme.
Higher levels are drawn on top of lower levels.
final
-
nodeMatchingCache
↔ Cache<
ITagCollection, ZoomlevelRange> -
LRU cache for node (POI) rendering instruction matches.
latefinal
-
openWayMatchingCache
↔ Cache<
ITagCollection, ZoomlevelRange> -
LRU cache for open way (linear) rendering instruction matches.
latefinal
-
rulesList
→ List<
Rule> -
Hierarchical list of styling rules for map feature rendering.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- styleMenu → StyleMenu?
-
final
Methods
-
complete(
) → void - Completes theme initialization by finalizing all rules.
-
dispose(
) → void -
getLevels(
) → int - Returns the number of distinct drawing levels required by this theme.
-
getMapBackground(
) → int? - Returns the background color for the map area.
-
getMapBackgroundOutside(
) → int? - Returns the background color for areas outside the map bounds.
-
getZoomlevelRangeNode(
ITagCollection tags) → ZoomlevelRange? - Returns the widest possible zoomrange which may accept the given argument. Returns null if the argument is never accepted.
-
getZoomlevelRangeWay(
Waypath waypath, ITagCollection tags) → ZoomlevelRange? - Returns the widest possible zoomrange which may accept the given argument. Returns null if if the argument will never accepted.
-
hasMapBackgroundOutside(
) → bool? - Returns true if a background color is defined for areas outside the map.
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
prepareZoomlevel(
int zoomlevel) → RenderthemeZoomlevel - Prepares and caches zoom level specific rendering rules.
-
setCategories(
Set< String> ? categories) → void - Sets the categories used for rendering. Rules can have a category parameter. When a list of categories is set with this method rules which do not match the categories will not be rendered. See also https://github.com/mapsforge/mapsforge/blob/master/docs/Rendertheme.md#stylemenus
-
toString(
) → String -
A string representation of this object.
inherited
-
traverseRules(
RuleVisitor visitor) → void - Traverses all rules in the theme using the visitor pattern.
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Static Properties
- MATCHING_CACHE_SIZE → int
-
Size of the matching cache for performance optimization.
final