paintMask method

void paintMask(Canvas canvas, Size size, ExtendedImageCropLayerPainter painter)

draw crop layer lines

Implementation

void paintMask(
    Canvas canvas, Size size, ExtendedImageCropLayerPainter painter) {
  final Rect rect = Offset.zero & size;
  final Rect cropRect = painter.cropRect;
  final Color maskColor = painter.maskColor;
  // canvas.saveLayer(rect, Paint());
  // canvas.drawRect(
  //     rect,
  //     Paint()
  //       ..style = PaintingStyle.fill
  //       ..color = maskColor);
  //   canvas.drawRect(cropRect, Paint()..blendMode = BlendMode.clear);
  // canvas.restore();

  // draw mask rect instead use BlendMode.clear, web doesn't support now.
  //left

  canvas.drawRect(
      Offset.zero & Size(cropRect.left, rect.height),
      Paint()
        ..style = PaintingStyle.fill
        ..color = maskColor);
  //top
  canvas.drawRect(
      Offset(cropRect.left, 0.0) & Size(cropRect.width, cropRect.top),
      Paint()
        ..style = PaintingStyle.fill
        ..color = maskColor);
  //right
  canvas.drawRect(
      Offset(cropRect.right, 0.0) &
          Size(rect.width - cropRect.right, rect.height),
      Paint()
        ..style = PaintingStyle.fill
        ..color = maskColor);
  //bottom
  canvas.drawRect(
      Offset(cropRect.left, cropRect.bottom) &
          Size(cropRect.width, rect.height - cropRect.bottom),
      Paint()
        ..style = PaintingStyle.fill
        ..color = maskColor);
}