vue3 甘特图（二）：甘特图时间轴切换

vue3 甘特图（二）：gantt时间轴切换

　　1.固定时间轴缩放级别　　

    gantt.config.scale_unit = "month"; //时间轴单位
    gantt.config.step = 1;//单位数
    gantt.config.date_scale = "%Y年%M";//时间轴展现方式

　　2.动态改变时间轴缩放

　　　　点击不同按钮，切换时间轴状态　　

　　2.1 配置时间轴参数

　　　　levels里可配置多个级别。

　　　scales展示时间轴对应多少行，下的format可自定展现方式，css属性方法可判断是否为轴，给周末添加上高亮属性。

const zoomConfig = {
  levels: [
    {
      name: 'day',
      scale_height: 60,
      scales: [{ unit: 'day', step: 1, format: '%d %M' }]
    },
    {
      name: 'week',
      scale_height: 60,
      scales: [
        {
          unit: 'week',
          step: 1,
          format: function (date) {
            let dateToStr = gantt.date.date_to_str('%m-%d')
            let endDate = gantt.date.add(date, -6, 'day')
            let weekNum = gantt.date.date_to_str('%W')(date) //第几周
            return dateToStr(endDate) + ' 至 ' + dateToStr(date)
          }
        },
        {
          unit: 'day',
          step: 1,
          format: '%d', // + "周%D"
          css: function (date) {
            if (date.getDay() == 0 || date.getDay() == 6) {
              return 'day-item weekend weekend-border-bottom'
            } else {
              return 'day-item'
            }
          }
        }
      ]
    },
    {
      name: 'month',
      scale_height: 60,
      min_column_width: 18,
      scales: [
        { unit: 'month', format: '%Y-%m' },
        {
          unit: 'day',
          step: 1,
          format: '%d',
          css: function (date) {
            if (date.getDay() == 0 || date.getDay() == 6) {
              return 'day-item weekend weekend-border-bottom'
            } else {
              return 'day-item'
            }
          }
        }
      ]
    },
    {
      name: 'quarter',
      height: 60,
      min_column_width: 110,
      scales: [
        {
          unit: 'quarter',
          step: 1,
          format: function (date) {
            let yearStr = new Date(date).getFullYear() + '年'
            let dateToStr = gantt.date.date_to_str('%M')
            let endDate = gantt.date.add(gantt.date.add(date, 3, 'month'), -1, 'day')
            return yearStr + dateToStr(date) + ' - ' + dateToStr(endDate)
          }
        },
        {
          unit: 'week',
          step: 1,
          format: function (date) {
            let dateToStr = gantt.date.date_to_str('%m-%d')
            let endDate = gantt.date.add(date, 6, 'day')
            let weekNum = gantt.date.date_to_str('%W')(date)
            return dateToStr(date) + ' 至 ' + dateToStr(endDate)
          }
        }
      ]
    },
    {
      name: 'year',
      scale_height: 50,
      min_column_width: 150,
      scales: [
        { unit: 'year', step: 1, format: '%Y年' },
        { unit: 'month', format: '%Y-%m' }
      ]
    }
  ]
}

　　2.2 初始化时间轴配置

  gantt.ext.zoom.init(zoomConfig) //配置初始化扩展
  gantt.ext.zoom.setLevel('month') //切换到指定的缩放级别

　　2.3 改变时间轴

const changeTime = () => {
  gantt.ext.zoom.setLevel(data.timeState)
}　

　　2.4 周末或特殊日期高亮

.weekend {
      background: #ff9e2f;
      color: #fff;
    }

　　3. 完整示例代码

<template>
  <section class="my-gantt">
    <div class="time-box">
      <el-radio-group v-model="data.timeState" @change="changeTime">
        <el-radio-button
          v-for="(time, t_index) in data.timeList"
          :key="t_index"
          :label="time.code"
          size="default"
          border
          >{{ time.name }}</el-radio-button
        >
      </el-radio-group>
    </div>
    <div id="gantt_here" class="gantt-container"></div>
  </section>
</template>

<script setup>
import { reactive, toRefs, onBeforeMount, onMounted, watchEffect, defineExpose } from 'vue'

import { gantt } from 'dhtmlx-gantt'
import 'dhtmlx-gantt/codebase/dhtmlxgantt.css'
import demoData from './ganttData.json'

const data = reactive({
  timeList: [
    // {
    //     name: "周",
    //     code: "week",
    // },
    {
      name: '月',
      code: 'month'
    },
    {
      name: '季',
      code: 'quarter'
    },
    {
      name: '年',
      code: 'year'
    }
  ],
  timeState: 'month'
})

const zoomConfig = {
  levels: [
    {
      name: 'day',
      scale_height: 60,
      scales: [{ unit: 'day', step: 1, format: '%d %M' }]
    },
    {
      name: 'week',
      scale_height: 60,
      scales: [
        {
          unit: 'week',
          step: 1,
          format: function (date) {
            let dateToStr = gantt.date.date_to_str('%m-%d')
            let endDate = gantt.date.add(date, -6, 'day')
            let weekNum = gantt.date.date_to_str('%W')(date) //第几周
            return dateToStr(endDate) + ' 至 ' + dateToStr(date)
          }
        },
        {
          unit: 'day',
          step: 1,
          format: '%d', // + "周%D"
          css: function (date) {
            if (date.getDay() == 0 || date.getDay() == 6) {
              return 'day-item weekend weekend-border-bottom'
            } else {
              return 'day-item'
            }
          }
        }
      ]
    },
    {
      name: 'month',
      scale_height: 60,
      min_column_width: 18,
      scales: [
        { unit: 'month', format: '%Y-%m' },
        {
          unit: 'day',
          step: 1,
          format: '%d',
          css: function (date) {
            if (date.getDay() == 0 || date.getDay() == 6) {
              return 'day-item weekend weekend-border-bottom'
            } else {
              return 'day-item'
            }
          }
        }
      ]
    },
    {
      name: 'quarter',
      height: 60,
      min_column_width: 110,
      scales: [
        {
          unit: 'quarter',
          step: 1,
          format: function (date) {
            let yearStr = new Date(date).getFullYear() + '年'
            let dateToStr = gantt.date.date_to_str('%M')
            let endDate = gantt.date.add(gantt.date.add(date, 3, 'month'), -1, 'day')
            return yearStr + dateToStr(date) + ' - ' + dateToStr(endDate)
          }
        },
        {
          unit: 'week',
          step: 1,
          format: function (date) {
            let dateToStr = gantt.date.date_to_str('%m-%d')
            let endDate = gantt.date.add(date, 6, 'day')
            let weekNum = gantt.date.date_to_str('%W')(date)
            return dateToStr(date) + ' 至 ' + dateToStr(endDate)
          }
        }
      ]
    },
    {
      name: 'year',
      scale_height: 50,
      min_column_width: 150,
      scales: [
        { unit: 'year', step: 1, format: '%Y年' },
        { unit: 'month', format: '%Y-%m' }
      ]
    }
  ]
}

//初始化甘特图
const initGantt = () => {
  gantt.config.grid_width = 350
  gantt.config.add_column = false //添加符号

  //时间轴图表中，如果不设置，只有行边框，区分上下的任务，设置之后带有列的边框，整个时间轴变成格子状。
  gantt.config.autofit = false
  gantt.config.row_height = 60
  gantt.config.bar_height = 34
  // gantt.config.fit_tasks = true //自动延长时间刻度，以适应所有显示的任务
  gantt.config.auto_types = true //将包含子任务的任务转换为项目，将没有子任务的项目转换回任务
  // gantt.config.xml_date = '%Y-%m-%d' //甘特图时间数据格式
  gantt.config.readonly = true //是否只读
  gantt.i18n.setLocale('cn') //设置语言
  gantt.init('gantt_here') //初始化
  gantt.parse(demoData) //填充数据

  gantt.ext.zoom.init(zoomConfig) //配置初始化扩展
  gantt.ext.zoom.setLevel('month') //切换到指定的缩放级别
}

const changeTime = () => {
  gantt.ext.zoom.setLevel(data.timeState)
}

onBeforeMount(() => {})
onMounted(() => {
  initGantt()
})
watchEffect(() => {})
defineExpose({
  ...toRefs(data)
})
</script>
<style scoped lang="scss">
.my-gantt {
  height: 800px;
  width: 100vw;
  .time-box {
    text-align: center;
    margin-bottom: 20px;
  }
  ::v-deep .gantt-container {
    width: 100%;
    height: 100%;
    .weekend {
      background: #ff9e2f;
      color: #fff;
    }
  }
}
</style>

　　4. 示例数据

　　　　见：vue3 甘特图（一）：选择与初始化甘特图 - 根号九九 - 博客园 (cnblogs.com)