fix: calculate band offset in area mark

antvis · Jun 2, 2023 · 25bb90d · 25bb90d
1 parent ef2a31d
commit 25bb90d
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Showing 4 changed files with 68 additions and 2 deletions.
diff --git a/__tests__/integration/snapshots/static/peopleIntervalAreaDualAxis.png b/__tests__/integration/snapshots/static/peopleIntervalAreaDualAxis.png
diff --git a/__tests__/plots/static/index.ts b/__tests__/plots/static/index.ts
@@ -100,6 +100,7 @@ export { monthIntervalFacetRect } from './month-interval-facet-rect';
 export { monthIntervalRadialFacetRect } from './month-interval-radial-facet-rect';
 export { weatherLineRepeatMatrixCol } from './weather-line-repeat-matrix-col';
 export { weatherLineAreaDualAxis } from './weather-line-area-dual-axis';
+export { peopleIntervalAreaDualAxis } from './people-interval-area-dual-axis';
 export { moviesIntervalMultipleMeasure } from './movies-interval-multiple-measure';
 export { seattleWeatherCellSpaceFlex } from './seattle-weather-cell-space-flex';
 export { salaryHeatmapScaleLinear } from './salary-heatmap-scale-linear';

diff --git a/__tests__/plots/static/people-interval-area-dual-axis.ts b/__tests__/plots/static/people-interval-area-dual-axis.ts
@@ -0,0 +1,62 @@
+import { G2Spec } from '../../../src';
+
+export function peopleIntervalAreaDualAxis(): G2Spec {
+  return {
+    padding: 'auto',
+    type: 'view',
+    data: {
+      type: 'fetch',
+      value: 'data/population.csv',
+      transform: [
+        {
+          type: 'filter',
+          callback: (d) => d.year === 2000,
+        },
+      ],
+    },
+    children: [
+      {
+        type: 'area',
+        transform: [{ type: 'groupX', y: 'sum' }],
+        encode: {
+          x: 'age',
+          y: 'people',
+        },
+        scale: {
+          y: { nice: true },
+        },
+        style: {
+          fill: '#85C5A6',
+          fillOpacity: 0.3,
+        },
+      },
+      {
+        type: 'interval',
+        encode: {
+          x: 'age',
+          y: (d) => (d.sex === 1 ? d.people : -d.people),
+          color: (d) => (d.sex === 1 ? 'male' : 'female'),
+        },
+        scale: {
+          x: { type: 'band', padding: 0.7 },
+          color: {
+            domain: ['male', 'female'],
+            range: ['#97e3d5', '#f47560'],
+          },
+        },
+        style: {
+          radius: 4,
+        },
+        axis: {
+          y: {
+            grid: false,
+            title: 'People',
+            style: {
+              titleFill: 'steelblue',
+            },
+          },
+        },
+      },
+    ],
+  };
+}
diff --git a/src/mark/area.ts b/src/mark/area.ts
@@ -39,20 +39,23 @@ export type AreaOptions = Omit<AreaMark, 'type'>;
 export const Area: MC<AreaOptions> = () => {
   return (index, scale, value, coordinate) => {
     const { x: X, y: Y, y1: Y1, series: S } = value;
+    const { x, y } = scale;
 
     // Group data by series field.
     const series = S ? Array.from(group(index, (i) => S[i]).values()) : [index];
     const I = series.map((group) => group[0]).filter((i) => i !== undefined);
 
     // A group of data corresponds to one area.
+    const xoffset = (x?.getBandWidth?.() || 0) / 2;
+    const yoffset = (y?.getBandWidth?.() || 0) / 2;
     const P = Array.from(series, (SI) => {
       const l = SI.length;
       const points = new Array(l * 2);
 
       for (let idx = 0; idx < SI.length; idx++) {
         const i = SI[idx];
-        points[idx] = coordinate.map([+X[i], +Y[i]]); // y1
-        points[l + idx] = coordinate.map([+X[i], +Y1[i]]); // y0
+        points[idx] = coordinate.map([+X[i] + xoffset, +Y[i] + yoffset]); // y1
+        points[l + idx] = coordinate.map([+X[i] + xoffset, +Y1[i] + yoffset]); // y0
       }
 
       return points;