VisibilityDetectorLayer constructor

VisibilityDetectorLayer({
  1. required Key key,
  2. required Offset widgetOffset,
  3. required Size widgetSize,
  4. required Offset paintOffset,
  5. required VisibilityChangedCallback onVisibilityChanged,
})

Constructor. See the corresponding properties for parameter details.

Implementation

VisibilityDetectorLayer(
    {required this.key,
      required this.widgetOffset,
      required this.widgetSize,
      required this.paintOffset,
      required this.onVisibilityChanged})
    : assert(key != null),
      assert(paintOffset != null),
      assert(widgetSize != null),
      assert(onVisibilityChanged != null);