isClickImgArea static method

dynamic isClickImgArea(
  1. int sw,
  2. int sh,
  3. Size renderSize,
  4. Offset clicLtInSImg,
  5. int clickW,
  6. int clickH,
  7. Offset localPosition,
)

判断是否点中图片的指定区域 sw,sh,图片的原始大小 renderSize:图片的渲染后所占用的像素大小 clicLtInSImg:原图上可以点击的区域左上角 clickW, clickH:原图上可点击的矩形的宽度和高度 localPosition：实际交互的时候点击的内容

Implementation

static isClickImgArea(int sw, int sh, Size renderSize, Offset clicLtInSImg, int clickW, int clickH, Offset localPosition) {
  //debugPrint("图片大小:${renderSize}");
  //debugPrint("点击区域:${localPosition}");
  double minX = clicLtInSImg.dx / sw * renderSize.width; //按比例求出渲染后的做上角X
  double maxX = minX + clickW / sw * renderSize.width; //
  double minY = clicLtInSImg.dy / sh * renderSize.height;
  double maxY = minY + renderSize.height * clickH / sh;
  Rect r = Rect.fromLTRB(minX, minY, maxX, maxY);
  // debugPrint("矩形区域--->:${r}");
  if (r.contains(localPosition)) {
    return true;
  }
  return false;
}