<template>
<el-dialog title="图片剪裁" :visible.sync="dialogVisible" v-if="dialogVisible" append-to-body  :width='diawidth' :show-close="false" @close="closeupimg">
    <el-row type="flex" justify="" >
      <label class="el-button el-button--primary" for="uploads" style="margin-right:20px">选择图片</label>
      <input type="file" id="uploads"  style="position:absolute; clip:rect(0 0 0 0);" accept="image/png, image/jpeg, image/gif, image/jpg" @change="uploadImg($event, 1)">

      <el-button type="success" icon="el-icon-zoom-in" @click="changeScale(1)"></el-button>
      <el-button type="success" icon="el-icon-zoom-out" @click="changeScale(-1)"></el-button>
      <el-button type="success" icon="el-icon-refresh-left" @click="rotateLeft"></el-button>
      <el-button type="success" icon="el-icon-refresh-right" @click="rotateRight"></el-button>
      <!-- <el-button type="success" icon="el-icon-download" @click="down('blob')">下载</el-button> -->
    </el-row>
    <el-row>
      <div class="cropper-content">
        <div class="cropper" :style="{'width':`${width+50}px`,'height':`${height+50}px`}">
          <vue-cropper
            ref="cropper"
            :img="option.img"
            :outputSize="option.size"
            :outputType="option.outputType"
            :info="true"
            :full="option.full"
            :canMove="option.canMove"
            :canMoveBox="option.canMoveBox"
            :original="option.original"
            :autoCrop="option.autoCrop"
            :autoCropWidth="option.autoCropWidth"
            :autoCropHeight="option.autoCropHeight"
            :fixedBox="option.fixedBox"
            @realTime="realTime"
            @imgLoad="imgLoad"
          ></vue-cropper>
        </div>
        <!-- 预览框 -->
        <div v-show='false' class="show-preview" :style="{ 'overflow': 'hidden'}">
          <div :style="previews.div" class="preview">
            <img :src="previews.url" :style="previews.img">
          </div>
        </div>
      </div>

    </el-row>
  <div slot="footer">
      <el-button @click="closeupimg" >取 消</el-button>
      <el-button type="primary" @click="finish('blob')">确认上传</el-button>
  </div>
</el-dialog>
</template>

<script>

  export default {
    props: ['width', 'height'],
    data () {
      return {
        dialogVisible: false,
        headImg: '',
        //剪切图片上传
        crap: false,
        previews: {},
        option: {
          img: '', // 裁剪图片的地址
          // info: true, // 裁剪框的大小信息
          outputSize: 1, // 裁剪生成图片的质量
          outputType: 'png', // 裁剪生成图片的格式
          canScale: false, // 图片是否允许滚轮缩放
          full: false, //输出原图比例截图 props名full
          canMove: true,
          original: false, // 上传图片按照原始比例渲染
          canMoveBox: true, // 截图框能否拖动
          autoCrop: true, // 是否默认生成截图框
          autoCropWidth: this.width || 200, // 默认生成截图框宽度
          autoCropHeight: this.height || 200, // 默认生成截图框高度
          fixedBox: true, // 固定截图框大小 不允许改变
          fixed: true, // 是否开启截图框宽高固定比例
          fixedNumber: [2, 1], // 截图框的宽高比例
          centerBox: false, // 截图框是否被限制在图片里面
          infoTrue: true // true 为展示真实输出图片宽高 false 展示看到的截图框宽高
        },
        fileName: '', //本机文件地址
        downImg: '#',
        imgFile: '',
        uploadImgRelaPath: '', //上传后的图片的地址（不带服务器域名）

        imgType: ''

      }
    },
    computed: {
      diawidth () {
        if (this.width > 700) {
          return `${this.width + 150}px`
        } else {
          return '50%'
        }
      }
    },
    methods: {
      init (type) {
        this.imgType = type || ''
        this.dialogVisible = true
      },

      //放大/缩小
      changeScale (num) {
        this.$forceUpdate()
        if (this.option.img == '') {
          return this.$message.error('请选择图片后操作！')
        } else {
          num = num || 1

          this.$refs.cropper.changeScale(num)
        }
      },
      //坐旋转
      rotateLeft () {
        // console.log('rotateLeft')
         this.$forceUpdate()
        if (this.option.img == '') {
          return this.$message.error('请选择图片后操作！')
        } else {
          this.$refs.cropper.rotateLeft()
        }
      },
      //右旋转
      rotateRight () {
        this.$forceUpdate()
        // console.log('rotateRight')
        if (this.option.img == '') {
          return this.$message.error('请选择图片后操作！')
        } else {
          this.$refs.cropper.rotateRight()
        }
      },
      //上传图片（点击上传按钮）
      finish (type) {
        // console.log('finish')
        this.$showLoading()
        let _this = this
        let formData = new FormData()
        // 输出
        if (type === 'blob') {
          this.$refs.cropper.getCropBlob((data) => {
            let img = window.URL.createObjectURL(data)
            this.model = true
            this.modelSrc = img
                // formData.append("file", data, this.fileName);
                formData.append('type', _this.imgType)
                formData.append('file', data)

                this.$http({
                    url: this.$http.adornUrl(`/upload/uploadFile`),
                    method: 'post',
                    data: formData
                }).then((data) => {
                    if (data && data.code === 0) {
                        this.headImg = data.bean.id
                        this.$emit('uploadSuccess', this.headImg, this.modelSrc)
                        this.$showLoading('close')
                        this.$message.success('上传成功!')
                        this.dialogVisible = false
                    } else {
                        this.$message.error('上传失败!')
                    }
                })
          })
        } else {
          this.$refs.cropper.getCropData((data) => {
            this.model = true
            this.modelSrc = data
          })
        }
      },
      // 实时预览函数
      realTime (data) {
        // console.log('realTime')
        // this.previews = data
      },
      //下载图片
      down (type) {
        this.error_cc()
        // console.log('down')
        var aLink = document.createElement('a')
        aLink.download = 'author-img'
        if (type === 'blob') {
          this.$refs.cropper.getCropBlob((data) => {
            this.downImg = window.URL.createObjectURL(data)
            aLink.href = window.URL.createObjectURL(data)
            aLink.click()
          })
        } else {
          this.$refs.cropper.getCropData((data) => {
            this.downImg = data
            aLink.href = data
            aLink.click()
          })
        }
      },
      //选择本地图片
      uploadImg (e, num) {
        var _this = this
        //上传图片
        var file = e.target.files[0]
        _this.fileName = file.name
        if (!/\.(gif|jpg|jpeg|png|bmp|GIF|JPG|PNG)$/.test(e.target.value)) {
          this.$message.error('图片类型必须是.gif,jpeg,jpg,png,bmp中的一种')
          return false
        } else if (file.size > 1048576) {
          this.$message.error('图片大小必须小于1M！')
          return false
        }
        var reader = new FileReader()
        // reader.readAsDataURL(file);
        reader.onload = (e) => {
          let data
          if (typeof e.target.result === 'object') {
            // 把Array Buffer转化为blob 如果是base64不需要
            data = window.URL.createObjectURL(new Blob([e.target.result]))
          } else {
            data = e.target.result
          }
          if (num === 1) {
            _this.option.img = data
            _this.headImg = data
            _this.$forceUpdate()
          } else if (num === 2) {
            _this.$forceUpdate()
            _this.example2.img = data
          }
        }
        _this.$forceUpdate()
        // 转化为base64
        reader.readAsDataURL(file)
        // 转化为blob
        // reader.readAsArrayBuffer(file);
      },
      imgLoad (msg) {
        // console.log('imgLoad')
        // console.log(msg)
      },
      closeupimg () {
        this.dialogVisible = false
        // this.$refs.cropper.clearCrop() //清除截图
      }

    }

  }
</script>

<style >
.info {
  width: 720px;
  margin: 0 auto;
}
.info .oper-dv {
  height: 20px;
  text-align: right;
  margin-right: 100px;
}
.info .oper-dv a {
  font-weight: 500;
}
.info .oper-dv a:last-child {
  margin-left: 30px;
}
.info .info-item {
  margin-top: 15px;
}
.info .info-item label {
  display: inline-block;
  width: 100px;
  text-align: right;
}
.info .info-item .sel-img-dv {
  position: relative;
}
.info .info-item .sel-img-dv .sel-file {
  position: absolute;
  width: 90px;
  height: 30px;
  opacity: 0;
  cursor: pointer;
  z-index: 2;
}
.info .info-item .sel-img-dv .sel-btn {
  position: absolute;
  cursor: pointer;
  z-index: 1;
}
.cropper-content {
  width: 100%;
  margin:50px auto;
  display: flex;
  flex-wrap: wrap;
  flex-direction: column;
  align-items: center;
  display: -webkit-flex;
  justify-content: space-around;
  -webkit-justify-content: space-around;
}

.cropper-content .show-preview {
  margin-top: 50px;
  flex: 1;
  -webkit-flex: 1;
  display: flex;
  display: -webkit-flex;
  justify-content: center;
  -webkit-justify-content: center;
}
.cropper-content .show-preview .preview {
  overflow: hidden;
  /* border-radius: 50%; */
  border: 1px solid #666;
  background: #ccc;
}

</style>