Renderinstruction class abstract

Abstract base class for all rendering instructions in the theme system.

A RenderInstruction represents a basic graphical primitive for drawing map elements. Instructions are parsed from XML theme files and function similarly to CSS rules for HTML, defining how map features should be visually rendered.

Key responsibilities:

Define rendering parameters and styling properties
Handle zoom level dependent scaling and display logic
Provide XML attribute constants for theme parsing
Support symbol lookup and resource management

Implementers

Constructors

Renderinstruction()

Properties

display ↔ MapDisplay: Display mode controlling when this instruction should be rendered.
getter/setter pair
hashCode → int: The hash code for this object.
no setterinherited
level ↔ int: getter/setter pair
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
serial → int: final

Methods

getBoundary(RenderInfo<Renderinstruction> renderInfo) → MapRectangle: Returns the boundary of this object around the center of the area or the poi. If the boundary cannot determined exactly we need to estimate it. This method is used only if the renderinstruction adds itself to label or clash (see LayerContainer)
getType() → String: Returns the type identifier for this rendering instruction.
matchNode(LayerContainer layerContainer, NodeProperties nodeProperties) → void: Checks the nodeProperties and adds itself to the layerContainer if there is something to draw.
matchWay(LayerContainer layerContainer, WayProperties wayProperties) → void: Checks the wayProperties and adds itself to the layerContainer if there is something to draw.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
renderinstructionScale(Renderinstruction base, int zoomlevel) → void: Scales rendering parameters based on zoom level and base instruction.
secondPass(SymbolSearcher symbolSearcher) → void: Captions needs to find their assigned symbol to correctly render themself around the symbol. After all rules has been created a second pass is executed where captions are able to find their assigned symbol.
toString() → String: A string representation of this object.
inherited

Operators

operator ==(Object other) → bool: The equality operator.
inherited

Static Properties

ALIGN_CENTER → String: Text alignment attribute for centering text elements.
final
ALL → String: Universal selector for applying to all elements.
final
CAT → String: Category attribute for element classification.
final
DISPLAY → String: Display mode attribute controlling element visibility.
final
DY → String: Vertical offset attribute for positioning adjustments.
final
FILL → String: Fill color attribute for area and shape rendering.
final
FONT_FAMILY → String: Font family attribute for text rendering.
final
FONT_SIZE → String: Font size attribute for text scaling.
final
FONT_STYLE → String: Font style attribute (normal, italic, bold).
final
ID → String: Unique identifier attribute for element referencing.
final
K → String: Key attribute for tag-based matching.
final
NONE → String: None value indicating absence of styling.
final
POSITION → String: Position attribute for element placement.
final
PRIORITY → String: Priority attribute for rendering order.
final
R → String: Red color component attribute.
final
RADIUS → String: Radius attribute for circular elements.
final
REPEAT → String: Repeat attribute for pattern repetition.
final
REPEAT_GAP → String: Gap between repeated elements.
final
REPEAT_START → String: Starting position for repeated elements.
final
ROTATE → String: Rotation angle attribute for element orientation.
final
SCALE → String: Scale factor attribute for element sizing.
final
SCALE_RADIUS → String: Scale radius attribute for circular scaling.
final
SRC → String: Source attribute for external resources.
final
STROKE → String: Stroke color attribute for line rendering.
final
STROKE_DASHARRAY → String: Dash pattern attribute for line styling.
final
STROKE_LINECAP → String: Line cap style attribute (round, square, butt).
final
STROKE_LINEJOIN → String: Line join style attribute (round, miter, bevel).
final
STROKE_WIDTH → String: Stroke width attribute for line thickness.
final
SYMBOL_HEIGHT → String: Symbol height attribute for icon sizing.
final
SYMBOL_ID → String: Symbol identifier attribute for icon referencing.
final
SYMBOL_PERCENT → String: Symbol percentage attribute for proportional sizing.
final
SYMBOL_SCALING → String: Symbol scaling mode attribute.
final
SYMBOL_WIDTH → String: Symbol width attribute for icon sizing.
final