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Add chartLayout getter to query chart values. #343

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Add chartLayout getter to query chart values. #343

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13 changes: 13 additions & 0 deletions google-chart.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -346,6 +346,19 @@ export class GoogleChart extends LitElement {
*/
private chartWrapper: google.visualization.ChartWrapper|null = null;

/**
* Returns the google.visualization.ChartLayoutInterface for the chart.
*
* Call this on the core chart and only after the chart is drawn
* (`google-chart-ready` event).
*/
get chartLayout() {
if (this.chartWrapper == null) return null;
const chart = this.chartWrapper.getChart();
return chart &&
(chart as google.visualization.CoreChartBase).getChartLayoutInterface();
}

private redrawTimeoutId: number|undefined = undefined;

protected override render() {
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