addToScene method

  1. @override
EngineLayer addToScene (SceneBuilder builder, [ Offset layerOffset = Offset.zero ])
override

Override this method to upload this layer to the engine.

Return the engine layer for retained rendering. When there's no corresponding engine layer, null is returned.

Implementation 

@override
ui.EngineLayer addToScene(ui.SceneBuilder builder, [Offset layerOffset = Offset.zero]) {
  ui.EngineLayer engineLayer;
  bool enabled = true;
  assert(() {
    enabled = !debugDisablePhysicalShapeLayers;
    return true;
  }());
  if (enabled) {
    engineLayer = builder.pushPhysicalShape(
      path: clipPath.shift(layerOffset),
      elevation: elevation,
      color: color,
      shadowColor: shadowColor,
      clipBehavior: clipBehavior,
    );
  }
  addChildrenToScene(builder, layerOffset);
  if (enabled)
    builder.pop();
  return engineLayer;
}