u-number-keyboard

<template>
  <view class="u-keyboard" @touchmove.stop.prevent>
    <view class="u-keyboard-grids">
      <view
        class="u-keyboard-grids-item"
        :class="[btnBgGray(index) ? 'u-bg-gray' : '', index <= 2 ? 'u-border-top' : '', index < 9 ? 'u-border-bottom' : '', (index + 1) % 3 != 0 ? 'u-border-right' : '']"
        :style="[itemStyle(index)]"
        v-for="(item, index) in numList"
        :key="index"
        :hover-class="hoverClass(index)"
        :hover-stay-time="100"
        @tap="keyboardClick(item)"
      >
        <view class="u-keyboard-grids-btn">{{ item }}</view>
      </view>
      <view
        class="u-keyboard-grids-item u-bg-gray"
        hover-class="u-hover-class"
        :hover-stay-time="100"
        @touchstart.stop="backspaceClick"
        @touchend="clearTimer"
      >
        <view class="u-keyboard-back u-keyboard-grids-btn">
          <u-icon name="backspace" :size="38" :bold="true"></u-icon>
        </view>
      </view>
    </view>
  </view>
</template>

<script>
export default {
  props: {
    // 键盘的类型，number-数字键盘，card-身份证键盘
    mode: {
      type: String,
      default: 'number'
    },
    // 是否显示键盘的"."符号
    dotEnabled: {
      type: Boolean,
      default: true
    },
    // 是否打乱键盘按键的顺序
    random: {
      type: Boolean,
      default: false
    }
  },
  data() {
    return {
      backspace: 'backspace', // 退格键内容
      dot: '.', // 点
      timer: null, // 长按多次删除的事件监听
      cardX: 'X' // 身份证的X符号
    }
  },
  computed: {
    // 键盘需要显示的内容
    numList() {
      let tmp = []
      if (!this.dotEnabled && this.mode == 'number') {
        if (!this.random) {
          return [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
        } else {
          return this.$u.randomArray([1, 2, 3, 4, 5, 6, 7, 8, 9, 0])
        }
      } else if (this.dotEnabled && this.mode == 'number') {
        if (!this.random) {
          return [1, 2, 3, 4, 5, 6, 7, 8, 9, this.dot, 0]
        } else {
          return this.$u.randomArray([1, 2, 3, 4, 5, 6, 7, 8, 9, this.dot, 0])
        }
      } else if (this.mode == 'card') {
        if (!this.random) {
          return [1, 2, 3, 4, 5, 6, 7, 8, 9, this.cardX, 0]
        } else {
          return this.$u.randomArray([1, 2, 3, 4, 5, 6, 7, 8, 9, this.cardX, 0])
        }
      }
    },
    // 按键的样式，在非乱序&&数字键盘&&不显示点按钮时，index为9时，按键占位两个空间
    itemStyle() {
      return index => {
        let style = {}
        if (this.mode == 'number' && !this.dotEnabled && index == 9)
          style.flex = '0 0 66.6666666666%'
        return style
      }
    },
    // 是否让按键显示灰色，只在非乱序&&数字键盘&&且允许点按键的时候
    btnBgGray() {
      return index => {
        if (
          !this.random &&
          index == 9 &&
          (this.mode != 'number' || (this.mode == 'number' && this.dotEnabled))
        )
          return true
        else return false
      }
    },
    hoverClass() {
      return index => {
        if (
          !this.random &&
          index == 9 &&
          ((this.mode == 'number' && this.dotEnabled) || this.mode == 'card')
        )
          return 'u-hover-class'
        else return 'u-keyboard-hover'
      }
    }
  },
  methods: {
    // 点击退格键
    backspaceClick() {
      this.$emit('backspace')
      clearInterval(this.timer) //再次清空定时器，防止重复注册定时器
      this.timer = null
      this.timer = setInterval(() => {
        this.$emit('backspace')
      }, 250)
    },
    clearTimer() {
      clearInterval(this.timer)
      this.timer = null
    },
    // 获取键盘显示的内容
    keyboardClick(val) {
      // 允许键盘显示点模式和触发非点按键时，将内容转为数字类型
      if (this.dotEnabled && val != this.dot && val != this.cardX)
        val = Number(val)
      this.$emit('change', val)
    }
  }
}
</script>

<style lang="scss" scoped>
@import '../../libs/css/style.components.scss';

.u-keyboard {
  position: relative;
  z-index: 1003;
}

.u-keyboard-grids {
  display: flex;
  flex-wrap: wrap;
}

.u-keyboard-grids-item {
  flex: 0 0 33.3333333333%;
  text-align: center;
  font-size: 25rpx;
  color: #333;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 55rpx;
  font-weight: 500;
}

.u-bg-gray {
  background-color: #e7e6eb;
}

.u-keyboard-back {
  font-size: 18rpx;
}

.u-keyboard-hover {
  background-color: #e7e6eb;
}
</style>