Added dark effect of square outside. There are sometimes need to cropping only image except white outside. So I added constrained cropping. Fix bug 'can't move when circle position is side.'

https://github.com/Mindinventory/image_cropping/blob/master/lib/image_cropping.dart

remove old one : WidgetsBinding.instance?.addPostFrameCallback((timeStamp) async { topViewHeight = stackGlobalKey.globalPaintBounds?.top ?? 0; });

replace with: WidgetsBinding.instance.addPostFrameCallback((timeStamp) async { topViewHeight = stackGlobalKey.globalPaintBounds?.top ?? 0; });

Warning: Operand of null-aware operation '?.' has type 'WidgetsBinding' which excludes null.

Hi! I found a possibility of most performance on flutter web. Its possible to use the resources of the dart:ui package. In example bellow you can resize an image and possible pass the width and heigth properties for the image in result.

Size _calculateSize({required Size imageSize, double? width, double? height}) {
    if (width != null && height != null) {
      return Size(width, height);
    } else if (width != null) {
      final scale = width / imageSize.width;
      final height = imageSize.height * scale;
      return Size(width, height);
    } else if (height != null) {
      final scale = height / imageSize.height;
      final width = imageSize.width * scale;
      return Size(width, height);
    }
    return imageSize;
  }
  
Future<ui.Image> resize(Uint8List image, {double? width, double? height}) async {
    final codec = await ui.instantiateImageCodec(image);
    final frameInfo = await codec.getNextFrame();
    final pictureRecorder = ui.PictureRecorder();
    final size = _calculateSize(
      imageSize: Size(
        frameInfo.image.width.toDouble(),
        frameInfo.image.height.toDouble(),
      ),
      height: height,
      width: width,
    );
    Canvas(pictureRecorder).drawImageRect(
      frameInfo.image,
      Rect.fromLTWH(0, 0, frameInfo.image.width.toDouble(), frameInfo.image.height.toDouble()), //change here 
      Rect.fromLTWH(0, 0, size.width, size.height), //change here
      Paint(),
    );
    frameInfo.image.dispose();
    return await pictureRecorder.endRecording().toImage(size.width.toInt(), size.height.toInt());
  }

For croping, you maybe change the parameters commenteds such necessary. I hope this helps.

From the README

Library used ... flutter_image_compress

This raises two questions for me:

1. Is this still right, its not shown in the pub.dev dependencies nor in the pubspec.yaml
2. Does this package also works on other platforms

Hi! I am so thankful. your package is looks very nice and useful. But when i try to crop image as 1/1 , the result shape should be square. Actually it never really crops right. the result stays to the left of which is clipped. Is this happening only to me? I am working on windows by the way.

Hi! First of all, thanks for this package!

I am experiencing an issue when using it in an application that must support also landscape mode, when the image_cropping screen pops up it will move to portrait mode and once it's done it will not go back to landscape.

Would it be possible for you to also support landscape mode?

Hello Team,

I need some help. I want cropper set on whole image base on image height and width how to achieve it using current code and which file /function need to changes also i need x & y starting position 0,0 .please team help me out.

Thanks ,

Yogita