fix(histogram): 直方图 histogram 修复不能关闭 legend 的问题

Author: ai-qing-hai

__tests__/unit/plots/histogram/index-spec.ts

@@ -148,6 +148,25 @@ describe('histogram', () => {
     histogram.destroy();
   });
 
+  it('直方图 关闭 legend', () => {
+    const histogram = new Histogram(createDiv('legend * true'), {
+      width: 400,
+      height: 300,
+      appendPadding: 10,
+      data: histogramStackData,
+      binField: 'value',
+      binWidth: 4,
+      legend: false,
+    });
+
+    histogram.render();
+
+    //@ts-ignore
+    expect(histogram.chart.getController('legend').components.length).toEqual(0);
+
+    histogram.destroy();
+  });
+
   it('stackField with color', () => {
     const colors = ['red', 'blue'];
     const histogram = new Histogram(createDiv(), {

src/plots/histogram/adaptor.ts

@@ -39,6 +39,8 @@ function geometry(params: Params<HistogramOptions>): Params<HistogramOptions> {
   // 图例
   if (legend && stackField) {
     chart.legend(stackField, legend);
+  } else {
+    chart.legend(false);
   }
 
   return params;