//index.js
//获取应用实例
const app = getApp()

Page({
  data: {
    zimu_list: ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'],
    scroll: '', //滚动到指定 id值的子元素
    touchmove: 0,//给字母导航添加背景色 1 添加 0不添加
    nav_height: '',//字母导航单个元素高度
    nav_top:'',
    hiddenn: true,//hint_box 提示框 展示隐藏
    nav_text: '',//hint_box 提示框里面的文本
    lb:[
        {
          url:'',
          text: '中国科学家实现“量子计算优越性”里程碑'
        },
        {
          url: '',
          text: '中国科学家实现“量子计算优越性”里程碑'
        },
        {
          url: '',
          text: '中国科学家实现“量子计算优越性”里程碑'
        }
    ],
    act:0
  },
  tab:function(e){
    this.setData({
      act: e.target.dataset.id
    })
  },
  swchange:function(e){
    this.setData({
      act: e.detail.current
    })
  },
  onReady: function () {
    this.get_height();
  },
  //事件处理函数
  touchstart: function (e) {
    this.set_scroll(e)
  },
  touchmove: function (e) {
    this.set_scroll(e)
  },
  touchend: function () {
    this.setData({
      touchmove: 0,
      hiddenn: true
    })
  },
  scroll(e){
      var that = this
      this.setData({
        scroll:e.target.dataset.id.toLowerCase(),
      })
  },
  set_scroll: function (e) {
    var page_y = e.changedTouches[0].pageY - this.data.nav_top;
    // console.log(page_y)
    var nav_height = +this.data.nav_height
    var idx = Math.floor(page_y / nav_height)
    var zimu = this.data.zimu_list[idx];
    this.setData({
      touchmove: 1,
      scroll: zimu.toLowerCase(),
      nav_text: zimu,
      hiddenn: false
    })
  },
  get_height: function () {
    var that = this
    var query = wx.createSelectorQuery();
    query.select('#nav_item').boundingClientRect()
    wx.createSelectorQuery().select('#nav').boundingClientRect(function (rect) {
      that.setData({
        nav_top: rect.top,
      })
    }).exec()
    query.exec(function (res) {
      that.setData({
        nav_height: res[0].height,
      })
    })
  },
  onLoad: function () {
 
  },
  getUserInfo: function(e) {
    console.log(e)
    app.globalData.userInfo = e.detail.userInfo
    this.setData({
      userInfo: e.detail.userInfo,
      hasUserInfo: true
    })
  }
})