feat(cloudwatch): legend positions in GraphWidgets

[njlynch]

Commit Message

feat(cloudwatch): legend positions in GraphWidgets

Allows specifying a position for the legend for a GraphWidget. If omitted,
defaults to the bottom of the graph.

fixes #3625

End Commit Message

Tested locally with a simple repro; checked cdk synth output and viewed the created CloudWatch dashboard.

const s3metric = new Metric({
  namespace: 'AWS/S3',
  metricName: 'NumberOfObjects',
  dimensions: {
    StorageType: 'AllStorageTypes',
    BucketName: 'cdktoolkit-stagingbucket-1tq3v6936uvys'
  }
});
const widgetDefault = new GraphWidget({
  title: 'S3 Count - Default',
  left: [s3metric],
});
const widgetBottom = new GraphWidget({
  title: 'S3 Count - Bottom',
  left: [s3metric],
  legendPosition: LegendPosition.BOTTOM,
});
const widgetRight = new GraphWidget({
  title: 'S3 Count - Right',
  left: [s3metric],
  legendPosition: LegendPosition.RIGHT,
});
const widgetHidden = new GraphWidget({
  title: 'S3 Count - Hidden',
  left: [s3metric],
  legendPosition: LegendPosition.HIDDEN,
});
const dashboard = new cloudwatch.Dashboard(this, 'Issue3625TestDashboard', {
  dashboardName: 'Issue3625TestDashboard',
  widgets: [[widgetDefault, widgetBottom], [widgetRight, widgetHidden]],
});

---

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

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AWS CodeBuild CI Report

• CodeBuild project: AutoBuildProject6AEA49D1-qxepHUsryhcu
• Commit ID: b70e6af
• Result: SUCCEEDED
• Build Logs (available for 30 days)

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