docs: function resetThVariable() {
      if (this.showType != 'grid') return;
      var oThis = this;
      this.contentWidth = 0;
  
      // 记录每列宽度及当前宽度之和
      $('#' + this.options.id + '_header_table th', this.$ele).each(function (i) {
          //会出现th多于列的情况，发现问题之后再看下为什么
          var gridCompColumn = oThis.gridCompColumnArr[i];
          var w = 0;
          if (gridCompColumn.options.visible) {
              w = parseInt(gridCompColumn.options.width);
          }
          this.attrLeftTotalWidth = oThis.contentWidth;
          oThis.contentWidth += w;
          oThis.resetThVariableDrag(this, gridCompColumn, w);
          this.gridCompColumn = gridCompColumn;
          this.attrWidth = w;
          this.attrRightTotalWidth = oThis.contentWidth;
      });
      oThis.resetThVariableHeaderLevel();
  }