dyf-vue-ui/src/views/homeIndex/components/DeviceUsage.vue

<template>
    <div class="vchartPage">
        <div class="btn_mounth_box">
            <div class="btn_mounth" :class="{ cur: activeTab == 'month' }" @click="switchTab('month')">近一月</div>
            <div class="btn_mounth" :class="{ cur: activeTab === 'halfYear' }" @click="switchTab('halfYear')">近半年</div>
        </div>

        <div ref="chartRef" class="chartRef"></div>
    </div>
</template>

<script setup lang="ts">
import * as echarts from 'echarts';
import { getDeviceUsageFrequency } from '@/api/homeIndex/index';

const chartRef = ref<HTMLDivElement | null>(null);
const activeTab = ref('month');
let myChart: echarts.ECharts | null = null; // 保存图表实例
let dataTimer: NodeJS.Timeout | null = null; // 数据更新定时器

// 根据天数获取数据并更新图表
const fetchDataAndUpdate = (days: number) => {
    getDeviceUsageFrequency({ days }).then((res) => {
        if (res.code === 200 && res.data && myChart) {
            // 处理接口返回的真实数据（转换为图表所需格式）
            const chartData = res.data.map(item => ({
                name: item.deviceName,
                value: item.frequency
            }));
            // 更新图表
            myChart.setOption({
                yAxis: {
                    data: chartData.map(item => item.name)
                },
                series: [{
                    data: chartData.map(item => item.value)
                }]
            });
        }
    }).catch(err => {
        console.error('获取数据失败', err);
    });
};

// 切换标签逻辑
const switchTab = (tab: string) => {
    activeTab.value = tab;
    // 根据标签切换天数（近一月=30天，近半年=180天）
    const days = tab === 'month' ? 30 : 180;
    fetchDataAndUpdate(days);
    
    // 切换标签后重新启动定时器
    startDataTimer();
};

// 开始数据定时器
const startDataTimer = () => {
    if (dataTimer) {
        clearInterval(dataTimer);
    }
    // 每300秒（5分钟）更新一次数据
    dataTimer = setInterval(() => {
        const days = activeTab.value === 'month' ? 30 : 180;
        fetchDataAndUpdate(days);
    }, 300000);
};

// 清除数据定时器
const clearDataTimer = () => {
    if (dataTimer) {
        clearInterval(dataTimer);
        dataTimer = null;
    }
};

// 初始化图表
const initChart = () => {
    if (!chartRef.value) return;
    
    myChart = echarts.init(chartRef.value);
    
    // 初始图表配置（空数据占位）
    const option = {
        tooltip: {
            trigger: 'axis',
            axisPointer: { type: 'shadow' } // 柱状图建议使用阴影指示器
        },
        grid: {
            left: '5%',
            right: '10%',
            bottom: '3%',
            top: '20%',
            containLabel: true
        },
        yAxis: {
            type: 'category',
            data: [], // 初始空数据
            axisLine: {
                lineStyle: {
                    color: '#1e3a8a',
                    show: false
                }
            },
            axisLabel: {
                color: '#DEEFFF'
            }
        },
        xAxis: {
            type: 'value',
            axisLine: { show: false },
            axisLabel: { show: false },
            splitLine: { show: false }
        },
        series: [{
            name: '使用频次',
            type: 'bar',
            data: [], // 初始空数据
            barWidth: '14px',
            stack: 'total',
            label: {
                show: true,
                position: 'right',
                valueAnimation: true,
                color: '#DEEFFF'
            },
            itemStyle: {
                color: new echarts.graphic.LinearGradient(
                    0, 0, 1, 0,
                    [
                        { offset: 0, color: '#0768D4' },
                        { offset: 1, color: '#0EC4DF' }
                    ]
                ),
                borderRadius: 4
            }
        }]
    };
    myChart.setOption(option);
    
    // 初始化数据
    fetchDataAndUpdate(30);
    
    // 启动定时器
    startDataTimer();
};

// 处理窗口大小变化
const handleResize = () => {
    if (myChart) {
        myChart.resize();
    }
};

onMounted(() => {
    initChart();
    window.addEventListener('resize', handleResize);
});

onUnmounted(() => {
    // 清除定时器
    clearDataTimer();
    // 移除事件监听
    window.removeEventListener('resize', handleResize);
    // 销毁图表实例
    if (myChart) {
        myChart.dispose();
        myChart = null;
    }
});
</script>

<style scoped lang="scss">
.vchartPage {
    margin-top: 4.8vh;
    position: relative; // 确保按钮定位正确
}

.btn_mounth_box {
    display: flex;
    position: absolute;
    right: 1vh;
    top: 0vh;
    z-index: 1;
}

.btn_mounth {
    width:4.5vw;
    height:4.5vh;
    background: url(@/assets/homeIndex/btn.png) no-repeat;
    background-size: 100% 100%;
    text-align: center;
    line-height: 4.4vh;
    color: #fff;
    font-size: 0.8vw;
    cursor: pointer;
    margin-left: 0.5vw; // 按钮间距
}

.cur {
    background: url(@/assets/homeIndex/btn_cur.png) no-repeat;
    background-size: 100% 100%;
}

.chartRef {
    width: 100%;
    height: 25vh;
}
</style>