我的代码如下所示:
drawGraph() {
let theChart;
let handler = () => {
let sel = theChart.getChart().getSelection();
alert('selection occurred');
console.log('selection event', sel, Object.keys(sel));
};
this.google = this.getGoogle();
this.dataTable = this.getDataTable();
this.orgData.fillDataTable(this.dataTable, 'PALA,SRINIVASRAO');
console.log('data', this.dataTable);
this.dataTable.setRowProperty(1, 'style', 'border: 0');
this.chart = this.createWrapped('OrgChart', 'chartDiv', this.dataTable);
theChart = this.chart;
this.chart.draw();
this.google.visualization.events.addListener(this.chart, 'select', handler);
}
图表画得很好,我的 evert 处理程序被击中,但 getSelection() 只返回 ["0"]。顺便说一句,createWrapped 正在使用 google.visualization.ChartWrapper。
那么我做错了什么?除了试图让它在 TypeScript 下工作之外,我的意思是。:)