Echart

  • web历史曲线卡顿问题---Echarts降采样策略 前端

    web历史曲线卡顿问题—Echarts降采样策略

    渲染绘制37W条数据3秒； 此时拖动图表底部滑块明显卡顿，并且第一眼看不到图表曲线趋势； 降采样策略： sampling: ‘average’, [cray…

    2021年3月19日 339
  • ECharts实时曲线图表 前端

    ECharts实时曲线图表

    代码： 示例：https://echarts.apache.org/examples/zh/editor.html?c=dynamic-data2 [crayon-61e57423…

    2021年3月19日 546
  • Highchart图表-实时曲线 前端

    Highchart图表-实时曲线

    代码

    JavaScript
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    splineChart(type, item) {
        let equipNm = '';
        let no = 0;
        let physicMax = 0; // 上限值
        let physicMin = 0; // 下限值
        let seriesList = [];
     
        let that = this;
        if (type === 'C') {
            equipNm = item.ycNm;
            no = item.ycNo;
            physicMax = item.valMax;
            physicMin = item.valMin;
     
            seriesList = [{
                name: '实时值',
                color: '#3875ff',
                animation: true,
                style: {
                    color: '#d3d8e2'
                },
                data: (function() {
                    let data = [],
                        time = new Date().getTime(),
                        i;
                    for (i = -9; i <= 0; i += 1) {
                        data.push({
                            x: time + i * 1000,
                            y: Number(that.getEquipCurve(no))
                        });
                    }
                    return data;
                })()
            },
            {
                name: '上限值',
                color: '#f54551',
                animation: true,
                type: 'spline',
                marker: {
                    enabled: false // 曲线是否显示值圆点
                },
                dashStyle: 'shortdot',
                style: {
                    color: 'red'
                },
                data: (function() {
                    let data = [],
                        time = new Date().getTime(),
                        i;
                    for (i = -9; i <= 0; i += 1) {
                        data.push({
                            x: time + i * 1000,
                            y: physicMax
                        });
                    }
                    return data;
                })()
            }, {
                name: '下限值',
                color: '#f5bb36',
                animation: true,
                type: 'spline',
                marker: {
                    enabled: false
                },
                dashStyle: 'shortdot',
                style: {
                    color: 'red'
                },
                data: (function() {
                    let data = [],
                        time = new Date().getTime(),
                        i;
                    for (i = -9; i <= 0; i += 1) {
                        data.push({
                            x: time + i * 1000,
                            y: physicMin
                        });
                    }
                    return data;
                })()
            },
     
            ]
        } else {
            equipNm = item.yxNm;
            no = item.yxNo;
            seriesList = [{
                name: '实时值',
                color: '#3875ff',
                animation: true,
                style: {
                    color: '#d3d8e2'
                },
                data: (function() {
                    let data = [],
                        time = new Date().getTime(),
                        i;
                    for (i = -9; i <= 0; i += 1) {
                        data.push({
                            x: time + i * 1000,
                            y: +Number(that.getEquipCurve(no))
                        });
                    }
                    return data;
                })()
            }]
        }
        this.equipChartNm = equipNm;
     
        Highcharts.chart('containerE', {
            chart: {
                type: 'spline',
                margin: [40, 23, 80, 60],
                backgroundColor: {
                    linearGradient: {
                        x1: 0,
                        y1: 0,
                        x2: 1,
                        y2: 1
                    },
                    stops: [
                        [0, '#252833'],
                        [1, '#252833']
                    ]
                },
     
                events: {
                    load: function() {
                        let series = this.series[0];
                        let chart = this;
                        let seriesPhysicMax = [];
                        let seriesPhysicMin = [];
                        if (type === 'C') {
                            seriesPhysicMax = this.series[1];
                            seriesPhysicMin = this.series[2];
                        }
     
                        that.activeLastPointToolip(chart);
                        if (this.timeChart) {
                            clearInterval(this.timeChart);
                        }
                        this.timeChart = setInterval(function() {
                            if (!typeof(that.getEquipCurve(no)) === 'number') {
                                return;
                            }
                            let x = new Date().getTime(),
                                y = Number(that.getEquipCurve(no));
                            series.addPoint([x, y], true, true);
                            if (type === 'C') {
                                seriesPhysicMax.addPoint([x, physicMax], true, true);
                                seriesPhysicMin.addPoint([x, physicMin], true, true);
                            }
                            that.activeLastPointToolip(chart);
                        }, that.IntervalTime);
                    }
                },
                borderColor: '#252833',
                plotBackgroundColor: '#252833',
                plotBorderColor: '#999fa8'
            },
            title: {
                text: ''
            },
            xAxis: {
                lineColor: '#999fa8',
                type: 'datetime',
                tickPixelInterval: 130,
                labels: {
                    style: {
                        color: '#d3d8e2'
                    }
                },
                axisLine: {
                    lineStyle: {
                        type: 'solid',
                        color: 'red', // 左边线的颜色
                        width: '2' // 坐标线的宽度
                    }
                },
                axisLabel: {
                    textStyle: {
                        color: 'red' // 坐标值得具体的颜色
                    }
                }
            },
            yAxis: {
                gridLineColor: '#3b4357',
                gridLineWidth: 1,
                title: {
                    text: '',
                    style: {
                        color: '#999fa8'
                    }
                },
                labels: {
                    style: {
                        color: '#d3d8e2'
                    }
                }
            },
            tooltip: {
                backgroundColor: '#000',
                formatter: function() {
                    return (
                        '<b>' +
                        this.series.name +
                        '</b><br/>' +
                        Highcharts.dateFormat('%Y-%m-%d %H:%M:%S', this.x) +
                        '<br/>' +
                        Highcharts.numberFormat(this.y, 3)
                    );
                },
                style: {
                    color: '#d3d8e2'
                }
            },
            legend: {
                enabled: type === 'C',
                layout: 'horizontal',
                x: 0,
                verticalAlign: 'top',
                y: -5,
                floating: true,
                align: 'right',
                labelFormatter: function() {
                    return '<span style="color:rgba(240, 244, 255, 0.64)"> ' + this.name + '</span>';
                }
            },
            plotOptions:{
                spline:{
                    animation: true,
                }
            },
            credits: {//配置右下角的版权信息
                enabled:false,//是否显示版权信息，默认：true。若想去除图表右下角highcharts官网链接则设置为false。
                text:" ",//版权信息显示内容，默认：Highcharts.com。
                href:" "//版权信息链接地址，默认：http://www.highcharts.com。
                },
            series: seriesList
        });
    },

     

    2021年1月28日 313
  • ECharts图表-历史曲线 前端

    ECharts图表-历史曲线

        代码

    JavaScript
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    //图表需要的数据【时间数组、时间所对应的数据数组】
    historyTime = equipHistory.times;
    historyValue = equipHistory.values;
     
    this.hisChart = this.$echart.init(
        document.getElementById('historyData'),
        'light'
    );
     
    this.hisChart.setOption({
        grid: {
            left: '1%',
            top: '10%',
            right: '2%',
            bottom: '11%',
            containLabel: true,
            color: 'red'
        },
        tooltip: {
            style: {
                color: 'red'
            }
        },
        xAxis: {
            type: 'category',
            splitLine: {
                show: false,
                lineStyle: { // x网格线
                    color: 'red'
                }
            },
            axisLine: {
                lineStyle: {
                    color: '#999fa8',
                    width: 1 // 这里是为了突出显示加上的
                }
            },
            axisLabel: {
                margin: 12,
                textStyle: {
                    color: '#d3d8e2',
                    fontSize: '13'
                }
            },
            labels: {
                style: {
                    color: '#d3d8e2'
                }
            },
            style: {
                color: '#d3d8e2'
            },
     
            data: historyTime
        },
        yAxis: {
            gridLineColor: '#3b4357',
            gridLineWidth: 1,
            type: 'value',
            axisLine: {
                show: false
            },
            axisTick: {
                show: false
            },
            axisLabel: {
                margin: 12,
                textStyle: {
                    color: '#d3d8e2',
                    fontSize: '13'
                }
            },
            style: {
                color: '#d3d8e2',
                fontWeight: 'bold',
                fontSize: '12px',
                fontFamily: 'Trebuchet MS, Verdana, sans-serif'
            },
     
            title: {
                style: {
                    color: '#d3d8e2',
                    fontWeight: 'bold',
                    fontSize: '12px',
                    fontFamily: 'Trebuchet MS, Verdana, sans-serif'
                }
            },
            labels: {
                style: {
                    color: '#d3d8e2'
                }
            },
            splitLine: {
                show: true,
                lineStyle: { // x网格线
                    color: '#373f51'
                }
            }
        },
        // 图表时间轴滑块
        dataZoom: [{
                height: 30,
                xAxisIndex: [0],
                start: 0,
                end: 10,
                handleIcon: 'path://M306.1,413c0,2.2-1.8,4-4,4h-59.8c-2.2,0-4-1.8-4-4V200.8c0-2.2,1.8-4,4-4h59.8c2.2,0,4,1.8,4,4V413z',
                handleSize: '110%',
                handleStyle: {
                    color: '#3b4357',
                    shadowBlur: 3,
                    shadowColor: '#3b4357',
                    shadowOffsetX: 2,
                    shadowOffsetY: 2,
                    textStyle: {
                        color: '#d3d8e2'
                    }
                },
                style: {
                    color: '#d3d8e2'
                },
                borderColor: '240, 244, 255, 0.16',
                color: 'red',
                fontColor: 'red',
                textStyle: {
                    color: '#d3d8e2'
                }
            },
            {
                type: 'inside',
                start: 0,
                end: 10,
                height: 15
            }
        ],
        series: [{
            data: historyValue,
            type: 'line',
            animation: false,
            // showSymbol :false,
            sampling: 'average', //降采样策略-明显优化拖动滚动条卡顿
            smooth: false
        }]
    });

     

    2021年1月28日 118
  • Echart曲线、折线鼠标移入数据圆点显示值 前端

    Echart曲线、折线鼠标移入数据圆点显示值

    当前状态： 一、 添加代码：

    效果：   二、 添加代码： [crayon-61e5742399ded4…

    2020年4月14日 255

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