aspect method

Implementation

// Positioned positionRelate(
//     {double? left,
//     double? right,
//     double? top,
//     double? bottom,
//     double? width,
//     double? height,
//     double? all,
//     double? horizon,
//     double? vertical}) {
//   double? mLeft = all ?? horizon ?? left;
//   double? mRight = all ?? horizon ?? right;
//   double? mTop = all ?? horizon ?? top;
//   double? mBottom = all ?? horizon ?? bottom;

//   double _left = mLeft ?? 0;
//   double _right = mRight ?? 0;
//   double _top = mTop ?? 0;
//   double _bottom = mBottom ?? 0;

//   double _width = width ?? (1 - _left - _right);
//   double _height = height ?? (1 - _top - _bottom);

//   if (mLeft == null) {
//     if (mRight != null && width != null) {
//       _left = 1 - width - mRight;
//     }
//   }

//   if (mRight == null) {
//     if (mLeft != null && width != null) {
//       _right = 1 - width - mLeft;
//     }
//   }

//   if (mTop == null) {
//     if (mBottom != null && height != null) {
//       _top = 1 - height - mBottom;
//     }
//   }

//   if (mBottom == null) {
//     if (mTop != null && height != null) {
//       _bottom = 1 - height - mTop;
//     }
//   }

//   print('_left:$_left, _top:$_top, _width:$_width, _heght:$_height');

//   RelativeRect r = RelativeRect.fromRect(
//     Rect.fromLTWH(_left * 100, _top * 100, _width * 100, _height * 100),
//     Rect.fromLTWH(0, 0, 100, 100),
//   );
//   print('rrrr :$r');
//   return Positioned.fromRelativeRect(rect: r, child: this);
// }

/// >>> 宽高比(1为正方形) >>>
AspectRatio aspect(double whRate) {
  return AspectRatio(aspectRatio: whRate, child: this);
}