captureImage method

@override Future<Image?> captureImage()

Captures the current visible canvas as an image. Returns a ui.Image which can be used to save or share the graph.

Implementation

@override
Future<ui.Image?> captureImage() async {
  try {
    final imageBoundary = boundaryRepaintKey.currentContext
        ?.findRenderObject() as RenderRepaintBoundary?;
    if (imageBoundary == null) return null;
    return imageBoundary.toImage(pixelRatio: 2.0);
  } catch (_) {
    return null;
  }
}