<import src="./toolbar.wxml" />
<view class="van-picker custom-class">
    <template is="toolbar" wx:if="{{ toolbarPosition === 'top' }}" data="{{ showToolbar, cancelButtonText, title, confirmButtonText }}"></template>
    <view wx:if="{{ loading }}" class="van-picker__loading">
        <loading color="#1989fa" />
    </view>
    <view class="van-picker__columns" style="height: {{ itemHeight * visibleItemCount }}px" catch:touchmove="noop">
        <picker-column class="van-picker__column" wx:for="{{ isSimple(columns) ? [columns] : columns }}" wx:key="index" data-index="{{ index }}" custom-class="column-class" value-key="{{ valueKey }}" initial-options="{{ isSimple(columns) ? item : item.values }}" default-index="{{ item.defaultIndex || defaultIndex }}" item-height="{{ itemHeight }}" visible-item-count="{{ visibleItemCount }}" active-class="active-class" bind:change="onChange" />
        <view class="van-picker__mask" style="background-size: 100% {{ (itemHeight * visibleItemCount - itemHeight) / 2 }}px" />
        <view class="van-picker__frame van-hairline--top-bottom" style="height: {{ itemHeight }}px" />
    </view>
    <template is="toolbar" wx:if="{{ toolbarPosition === 'bottom' }}" data="{{ showToolbar, cancelButtonText, title, confirmButtonText }}"></template>
</view>
<wxs module="isSimple">
  function isSimple(columns) {
    return columns.length && !columns[0].values;
  }
  module.exports = isSimple;
</wxs>