text: var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
      var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
      if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
      else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
      return c > 3 && r && Object.defineProperty(target, key, r), r;
  };
  import { SuperComponent, wxComponent } from '../common/src/index';
  import config from '../common/config';
  import props from './picker-item-props';
  const itemHeight = 80;
  const DefaultDuration = 200;
  const { windowWidth } = wx.getSystemInfoSync();
  const rpx2px = (rpx) => Math.floor((windowWidth * rpx) / 750);
  const range = function (num, min, max) {
      return Math.min(Math.max(num, min), max);
  };
  let PickerColumn = class PickerColumn extends SuperComponent {
      constructor() {
          super(...arguments);
          this.relations = {
              './picker': {
                  type: 'parent',
              },
          };
          this.properties = props;
          this.observers = {
              value() {
                  this.updateColumns();
              },
              options() {
                  this.updateColumns();
              },
          };
          this.data = {
              prefix: `${config.prefix}-picker-column`,
              offset: 0,
              duration: 0, // 滚动动画延迟
          };
          this.methods = {
              onTouchStart(event) {
                  this.StartY = event.touches[0].clientY;
                  this.StartOffset = this.data.offset;
                  this.setData({ duration: 0 });
              },
              onTouchMove(event) {
                  const { StartY, StartOffset, itemHeight } = this;
                  // 偏移增量
                  const deltaY = event.touches[0].clientY - StartY;
                  this.setData({
                      offset: range(StartOffset + deltaY, -(this.getCount() * itemHeight), 0),
                  });
              },
              onTouchEnd() {
                  const { offset } = this.data;
                  const { options } = this.properties;
                  if (offset === this.StartOffset) {
                      return;
                  }
                  // 调整偏移量
                  const index = range(Math.round(-offset / this.itemHeight), 0, this.getCount() - 1);
                  this.setData({
                      duration: DefaultDuration,
                      offset: -index * this.itemHeight,
                  });
                  if (index === this._selectedIndex) {
                      return;
                  }
                  wx.nextTick(() => {
                      var _a;
                      const changeObj = {
                          index,
                          value: options[index],
                      };
                      this._selectedIndex = index;
                      this._selectedValue = options[index];
                      this.triggerEvent('change', changeObj);
                      const picker = (_a = this.getRelationNodes('./picker')) === null || _a === void 0 ? void 0 : _a[0];
                      if (picker) {
                          picker.triggerChange(Object.assign(Object.assign({}, changeObj), { column: this.columnIndex || 0 }));
                      }
                  });
              },
              // 刷新选中状态
              updateColumns() {
                  const { options, value } = this.properties;
                  const index = options.findIndex((item) => item.value === value);
                  const selectedIndex = index > 0 ? index : 0;
                  this.setData({ offset: -selectedIndex * this.itemHeight });
                  this._selectedIndex = selectedIndex;
                  this._selectedValue = options[selectedIndex];
              },
              resetOrigin() {
                  this.updateColumns();
              },
              getCount() {
                  var _a, _b;
                  return (_b = (_a = this.data) === null || _a === void 0 ? void 0 : _a.options) === null || _b === void 0 ? void 0 : _b.length;
              },
          };
      }
      created() {
          this.StartY = 0;
          this.StartOffset = 0;
          this.itemHeight = rpx2px(itemHeight);
      }
  };
  PickerColumn = __decorate([
      wxComponent()
  ], PickerColumn);
  export default PickerColumn;
  
  //# sourceMappingURL=picker-column.js.map
  