refactor(legend): render legend in legendView when icon is defined

src/chart/line/LineSeries.ts

@@ -39,10 +39,8 @@ import {
 import List from '../../data/List';
 import type Cartesian2D from '../../coord/cartesian/Cartesian2D';
 import type Polar from '../../coord/polar/Polar';
-import {PathStyleProps} from 'zrender/src/graphic/Path';
 import {createSymbol, ECSymbol} from '../../util/symbol';
 import {Group} from '../../util/graphic';
-import {LineStyleProps} from '../../model/mixin/lineStyle';
 import {LegendSymbolParams} from '../../component/legend/LegendModel';
 
 type LineDataValue = OptionDataValue | OptionDataValue[];
@@ -217,27 +215,23 @@ class LineSeriesModel extends SeriesModel<LineSeriesOption> {
     getLegendIcon(opt: LegendSymbolParams): ECSymbol | Group {
         const group = new Group();
 
-        // Draw line only if legend.icon is not defined
-        if (!opt.legendIconType) {
-            const line = createSymbol(
-                'line',
-                0,
-                opt.itemHeight / 2,
-                opt.itemWidth,
-                0,
-                opt.lineStyle.stroke,
-                false
-            );
-            group.add(line);
-            line.setStyle(opt.lineStyle);
-        }
+        const line = createSymbol(
+            'line',
+            0,
+            opt.itemHeight / 2,
+            opt.itemWidth,
+            0,
+            opt.lineStyle.stroke,
+            false
+        );
+        group.add(line);
+        line.setStyle(opt.lineStyle);
 
-        const visualType = opt.series.getData().getVisual('symbol');
-        const symbolType = opt.legendIconType
-            || (visualType === 'none' ? 'circle' : visualType);
+        const visualType = this.getData().getVisual('symbol');
+        const symbolType = visualType === 'none' ? 'circle' : visualType;
 
         // Symbol size is 80% when there is a line
-        const size = opt.itemHeight * (opt.legendIconType ? 1 : 0.8);
+        const size = opt.itemHeight * 0.8;
         const symbol = createSymbol(
             symbolType,
             (opt.itemWidth - size) / 2,

src/component/legend/LegendModel.ts

@@ -140,17 +140,12 @@ export interface LegendTooltipFormatterParams {
 }
 
 export interface LegendSymbolParams {
-    series: SeriesModel,
     itemWidth: number,
     itemHeight: number,
     /**
      * symbolType is from legend.icon, legend.data.icon, or series visual
      */
     symbolType: string,
-    /**
-     * legendIconType is from legend.icon or legend.data.icon
-     */
-    legendIconType: string,
     symbolKeepAspect: boolean,
     itemStyle: PathStyleProps,
     lineStyle: LineStyleProps

src/component/legend/LegendView.ts

@@ -353,14 +353,14 @@ class LegendView extends ComponentView {
 
         const textStyleModel = itemModel.getModel('textStyle');
 
-        if (typeof seriesModel.getLegendIcon === 'function') {
+        if (typeof seriesModel.getLegendIcon === 'function'
+            && !legendIconType
+        ) {
             // Series has specific way to define legend icon
             itemGroup.add(seriesModel.getLegendIcon({
-                series: seriesModel,
                 itemWidth,
                 itemHeight,
                 symbolType,
-                legendIconType: legendIconType,
                 symbolKeepAspect,
                 itemStyle: style.itemStyle,
                 lineStyle: style.lineStyle
@@ -369,11 +369,9 @@ class LegendView extends ComponentView {
         else {
             // Use default legend icon policy for most series
             itemGroup.add(getDefaultLegendIcon({
-                series: seriesModel,
                 itemWidth,
                 itemHeight,
                 symbolType,
-                legendIconType,
                 symbolKeepAspect,
                 itemStyle: style.itemStyle,
                 lineStyle: style.lineStyle