transform property

@override List<CSSFunctionalNotation>? get transform

Implementation

@override
List<CSSFunctionalNotation>? get transform => _transform;

set transform (List<CSSFunctionalNotation>? value)

Implementation

set transform(List<CSSFunctionalNotation>? value) {
  // Even if the transform value has not changed, ensure the cached
  // transformMatrix is cleared so any animation-driven state is dropped
  // and the effective transform recomputes from the current value.
  if (_transform == value) {
    // If a transform transition is currently running, let the
    // animation own matrix updates.
    if (this is CSSRenderStyle && (this as CSSRenderStyle).isTransitionRunning(TRANSFORM)) {
      return;
    }
    // Otherwise, clear cached matrix and repaint so the effective transform
    // recomputes from the current value (handles var()/percent changes).
    _transformMatrix = null;
    markNeedsPaint();
    return;
  }
  _transform = value;
  _transformMatrix = null;

  // Mark the compositing state for this render object as dirty
  // cause it will create new layer when transform is valid.
  if (value != null) {
    markNeedsCompositingBitsUpdate();
  }

  // Transform effect the stacking context.
  if (isParentRenderLayoutBox()) {
    markParentNeedsSort();
  }

  // Transform stage are applied at paint stage, should avoid re-layout.
  markNeedsPaint();
}