Cloudwatch GraphWidget missing legend

[mitchlloyd]

• I'm submitting a ...

  • 🪲 bug report
  • 🚀 feature request
  • 📚 construct library gap
  • ☎️ security issue or vulnerability => Please see policy
  • ❓ support request => Please see note at the top of this template.

• What is the expected behavior (or behavior of feature suggested)?

cloudwatch.GraphWidget should accept a legend or legendPosition property that sets the appropriate values in the toJson output.

My current workaround looks like this:

export class ExtendedGraphWidget extends GraphWidget {
  private legendPosition: LegendPosition;
  constructor(props: ExtendedGraphWidgetProps) {
    super(props);
    this.legendPosition = props.legendPosition || LegendPosition.Bottom;
  }

  toJson(): any[] {
    const widgetConfig = super.toJson();

    return widgetConfig.map(obj => ({
      ...obj,
      properties: {
        ...obj.properties,
        legend: {
          position: this.legendPosition,
        }
      }
    }));
  }
}

• What is the motivation / use case for changing the behavior or adding this feature?
  This legend config allows users to change the position of the legend or hide the legend by passing "hidden".

• Please tell us about your environment:

  • CDK CLI Version: 1.3.0 (build bba9914)
  • Module Version: aws-cloudwatch 1.3.0
  • OS: OSX
  • Language: TypeScript