highcharts-angular dynamically update from DB

Question

I'm using highcharts-angular in angular 6 app. When I set data, hardcore it, in ngOnInit, chart is visible and works correctly.

But I want to update chart series dynamically, meaning add point to the series, add new series... This will be done after calling web API and getting new data, calling loadBidChartData().

If I set new series for chat, or update series, chart don't see changes, initial state is not changing. How can I solve this?

Here is small peace of example code in html is like this:

<highcharts-chart [Highcharts]="Highcharts" [options]="chartOptions" style="width: 100%; height: 400px; display: block; overflow: auto;" [update]="true" ></highcharts-chart>

in angular:

 import * as Highcharts from 'highcharts';
 export class ExampleComponent implements OnInit {
  Highcharts = Highcharts; // required    
  chartOptions = {
    chart: {
        type: "scatter",
        width: 900           
        },
    },
    tooltip: {
        valueDecimals: 0,
        formatter: function () {
            return this.y + ' €';
        }
    },
    title: {
        text: ''
    },
    xAxis: {
        type: 'datetime',            
    },
    yAxis: {
        type: 'number',            
    },
    legend: {
        layout: 'vertical',
        align: 'right',
        verticalAlign: 'top',
        floating: false,
        borderWidth: 1
    },
    series: []      
};

ngOnInit(): void {
    this.chartOptions.series= [{
            name: 'first last',
            data: [[Date.UTC(2018, 11, 16, 10, 56, 25), 23], [Date.UTC(2018, 11, 16, 10, 57, 15), 132], [Date.UTC(2018, 11, 16, 10, 58, 2), 312], [Date.UTC(2018, 11, 16, 10, 58, 15), 432]]
        }];
}

loadBidChartData(bidApiModel: BidItem[]): void {
    this.chartOptions.series= [{
        name: 'first last',
        data: [[Date.UTC(2018, 11, 16, 10, 56, 25), 23], [Date.UTC(2018, 11, 16, 10, 57, 15), 132], [Date.UTC(2018, 11, 16, 10, 58, 2), 312], [Date.UTC(2018, 11, 16, 10, 58, 15), 432]]
    },
    {
        name: 'second last',
        data: [[Date.UTC(2018, 11, 16, 10, 56, 28), 50], [Date.UTC(2018, 11, 16, 10, 56, 45), 152], [Date.UTC(2018, 11, 16, 10, 56, 53), 250], [Date.UTC(2018, 11, 16, 10, 57, 11), 320]]
    }];
 }
}

Solution: Working demo with updating in background and adding and removing points to highcharts: https://stackblitz.com/edit/angular-bv26xz
Thank you User3250 and Wojciech Chmiel for the help.

User3250 User3250 · Accepted Answer · 2018-11-19T14:46:05

You need to use [(update)] flag to update the series as below:

loadBidChartData(bidApiModel: BidItem[]): void {
    this.chartOptions.series= [{
        name: 'first last',
        data: [[Date.UTC(2018, 11, 16, 10, 56, 25), 23], [Date.UTC(2018, 11, 16, 10, 57, 15), 132], [Date.UTC(2018, 11, 16, 10, 58, 2), 312], [Date.UTC(2018, 11, 16, 10, 58, 15), 432]]
    },
    {
        name: 'second last',
        data: [[Date.UTC(2018, 11, 16, 10, 56, 28), 50], [Date.UTC(2018, 11, 16, 10, 56, 45), 152], [Date.UTC(2018, 11, 16, 10, 56, 53), 250], [Date.UTC(2018, 11, 16, 10, 57, 11), 320]]
    }];
   this.updateFlag = true;
}

<highcharts-chart [Highcharts]="Highcharts" [options]="chartOptions" style="width: 100%; height: 400px; display: block; overflow: auto;" [(update)]="updateFlag" ></highcharts-chart>

Working demo here: https://stackblitz.com/edit/angular-d5spve

highcharts-angular dynamically update from DB

1 Answers