other / mew-iview

  <template>

      <div :class="classes" :style="styles">

          <slot></slot>
      </div>
  </template>
  <script>

      import { oneOf, findComponentDownward, findBrothersComponents } from '../../utils/assist';

  
      const prefixCls = 'ivu-row';
  
      export default {

          name: 'Row',

          props: {
              type: {
                  validator (value) {
                      return oneOf(value, ['flex']);
                  }
              },
              align: {
                  validator (value) {
                      return oneOf(value, ['top', 'middle', 'bottom']);
                  }
              },
              justify: {
                  validator (value) {
                      return oneOf(value, ['start', 'end', 'center', 'space-around', 'space-between']);
                  }
              },

              gutter: {
                  type: Number,
                  default: 0
              },

              className: String
          },
          computed: {
              classes () {
                  return [

                      {

                          [`${prefixCls}`]: !this.type,

                          [`${prefixCls}-${this.type}`]: !!this.type,
                          [`${prefixCls}-${this.type}-${this.align}`]: !!this.align,
                          [`${prefixCls}-${this.type}-${this.justify}`]: !!this.justify,
                          [`${this.className}`]: !!this.className
                      }

                  ];

              },
              styles () {
                  let style = {};
                  if (this.gutter !== 0) {
                      style = {
                          marginLeft: this.gutter / -2 + 'px',
                          marginRight: this.gutter / -2 + 'px'

                      };

                  }
  
                  return style;

              }

          },
          methods: {
              updateGutter (val) {

                  // 这里会嵌套寻找，把 Col 里的 Row 里的 Col 也找到，所以用 兄弟找
  //                const Cols = findComponentsDownward(this, 'iCol');
                  const Col = findComponentDownward(this, 'iCol');
                  const Cols = findBrothersComponents(Col, 'iCol', false);

                  if (Cols.length) {
                      Cols.forEach((child) => {
                          if (val !== 0) {
                              child.gutter = val;
                          }
                      });
                  }

              }
          },
          watch: {
              gutter (val) {
                  this.updateGutter(val);
              }

          }

      };
  </script>