I've been trying to set a custom label in a line chart's tooltip , e.g., modified number of minutes in HH:mm format (74 min --> 1:14), for quite some time now, but unfortunately without any success. Displaying the value as 1.283(...3) is not an alternative.
Number to HH:mm as tooltip label
Does anybody know how to preserve the x and y axis values (a date and a number respectively), and modify the tooltip display value?
For example: https://swimlane.github.io/ngx-charts/#/ngx-charts/line-chart
Instead of having a tooltip that displays Color, Country name and Number, --> Color, Country name and String (Number > 3000 ? 'high' : 'low';)
Current behavior Works as intended.
Expected behavior To display custom labels.
Reproduction of the problem Link in the description above
What is the motivation / use case for changing the behavior? Being able to customize tooltips' contents
Please tell us about your environment: OS: Win 10 x64, IDE: Eclipse EE
ngx-charts version: 3.0.2
Angular version: 6.0.2
Browser: [all]
Language: [TypeScript 2.3.3]
You can define your own tooltip templates and render any HTML you like in them:
<ngx-charts-line-chart
[scheme]="colorScheme"
[results]="multi" ...>
<ng-template #tooltipTemplate let-model="model">
This is the single point tooltip template
<pre>{{model|json}}</pre>
</ng-template>
<ng-template #seriesTooltipTemplate let-model="model">
This is vertical line tooltip template
<pre>{{model|json}}</pre>
</ng-template>
</ngx-charts-line-chart>
Example: https://swimlane.github.io/ngx-charts/#/ngx-charts/tooltip-templates
Code is here: https://github.com/swimlane/ngx-charts/blob/8ebb3dbcbbea443fefdcafd1f5c9069df0e0c4ae/src/app/app.component.html#L992-L998