AG-13216 Gauges pickFocus implementation

packages/ag-charts-community/src/chart/series/seriesAreaManager.ts

@@ -439,8 +439,8 @@ export class SeriesAreaManager extends BaseManager {
     }
 
     private handleSeriesFocus(otherIndexDelta: number, datumIndexDelta: number, refresh = false) {
-        if (this.chart.chartType === 'hierarchy') {
-            this.handleHierarchySeriesFocus(otherIndexDelta, datumIndexDelta, refresh);
+        if (this.chart.chartType === 'hierarchy' || this.chart.chartType === 'gauge') {
+            this.handleSoloSeriesFocus(otherIndexDelta, datumIndexDelta, refresh);
             return;
         }
         const { focus, seriesRect } = this;
@@ -457,10 +457,11 @@ export class SeriesAreaManager extends BaseManager {
         this.updatePickedFocus(pick, refresh);
     }
 
-    private handleHierarchySeriesFocus(otherIndexDelta: number, datumIndexDelta: number, refresh: boolean) {
-        // Hierarchial charts (treemap, sunburst) can only have 1 series. So we'll repurpose the focus.seriesIndex
-        // value to control the focused depth. This allows the hierarchial charts to piggy-back on the base keyboard
-        // handling implementation.
+    private handleSoloSeriesFocus(otherIndexDelta: number, datumIndexDelta: number, refresh: boolean) {
+        // Some chart type (treemap, sunburst, gauges) can only have 1 series. So we'll repurpose the focus.seriesIndex
+        // value. Hierarchial charts use arrowup/down to change depth and gauges use arrowup/down to change datum type
+        // (bar/needle, targets). This allows the hierarchial and gauge charts to piggy-backon the base keyboard handling
+        // implementation.
         this.focus.series = this.focus.sortedSeries[0];
         const {
             focus: { series, seriesIndex: otherIndex, datumIndex },
@@ -475,7 +476,10 @@ export class SeriesAreaManager extends BaseManager {
         const { focus, hoverRect } = this;
         if (pick === undefined || focus.series === undefined || hoverRect === undefined) return;
 
-        const { datum, datumIndex } = pick;
+        const { datum, datumIndex, otherIndex } = pick;
+        if (otherIndex !== undefined) {
+            focus.seriesIndex = otherIndex;
+        }
         focus.datumIndex = datumIndex;
         focus.datum = datum;
 

packages/ag-charts-enterprise/src/series/gauge-util/focus.ts

@@ -0,0 +1,37 @@
+import { _ModuleSupport } from 'ag-charts-community';
+
+const { clamp } = _ModuleSupport;
+type SeriesNodeDatum = _ModuleSupport.SeriesNodeDatum<unknown>;
+type SelectionNode = { node: _ModuleSupport.Path; datum: SeriesNodeDatum };
+type PickFocusInputs = _ModuleSupport.PickFocusInputs;
+type PickFocusOutputs = _ModuleSupport.PickFocusOutputs;
+type GaugeSeriesProperties = {
+    contextNodeData?: {
+        nodeData: SeriesNodeDatum[];
+        targetData: SeriesNodeDatum[];
+    };
+    datumSelection: Iterable<SelectionNode>;
+    targetSelection: Iterable<SelectionNode>;
+};
+
+export function pickGaugeFocus(self: GaugeSeriesProperties, opts: PickFocusInputs): PickFocusOutputs | undefined {
+    const others = [
+        { data: self.contextNodeData?.nodeData, selection: self.datumSelection },
+        { data: self.contextNodeData?.targetData, selection: self.targetSelection },
+    ].filter((v) => v.data && v.data.length > 0);
+    const otherIndex = clamp(0, opts.otherIndex + opts.otherIndexDelta, others.length - 1);
+    if (others.length === 0) return;
+
+    const { data, selection } = others[otherIndex];
+    if (data == null || data.length === 0) return;
+
+    const datumIndex = clamp(0, opts.datumIndex, data.length - 1);
+    const datum = data[datumIndex];
+
+    for (const node of selection) {
+        if (node.datum === datum) {
+            const bounds = node.node;
+            return { bounds, showFocusBox: true, clipFocusBox: true, datum, datumIndex, otherIndex };
+        }
+    }
+}

packages/ag-charts-enterprise/src/series/linear-gauge/linearGaugeSeries.ts

@@ -7,6 +7,7 @@ import {
     _ModuleSupport,
 } from 'ag-charts-community';
 
+import { pickGaugeFocus } from '../gauge-util/focus';
 import { fadeInFns, formatLabel, getLabelText } from '../gauge-util/label';
 import { lineMarker } from '../gauge-util/lineMarker';
 import { type UnknownGaugeNodeDatum, parseUnknownGaugeNodeDatum } from '../gauge-util/properties';
@@ -179,11 +180,11 @@ export class LinearGaugeSeries
         this.scaleGroup,
         () => this.nodeFactory()
     );
-    private datumSelection: _ModuleSupport.Selection<_ModuleSupport.Rect, LinearGaugeNodeDatum> = Selection.select(
+    public datumSelection: _ModuleSupport.Selection<_ModuleSupport.Rect, LinearGaugeNodeDatum> = Selection.select(
         this.itemGroup,
         () => this.nodeFactory()
     );
-    private targetSelection: _ModuleSupport.Selection<_ModuleSupport.Marker, LinearGaugeTargetDatum> = Selection.select(
+    public targetSelection: _ModuleSupport.Selection<_ModuleSupport.Marker, LinearGaugeTargetDatum> = Selection.select(
         this.itemTargetGroup,
         () => this.markerFactory()
     );
@@ -1112,19 +1113,7 @@ export class LinearGaugeSeries
     }
 
     override pickFocus(opts: _ModuleSupport.PickFocusInputs): _ModuleSupport.PickFocusOutputs | undefined {
-        const targetData = this.contextNodeData?.targetData;
-        if (targetData == null || targetData.length === 0) return;
-
-        const datumIndex = Math.min(Math.max(opts.datumIndex, 0), targetData.length - 1);
-
-        const datum = targetData[datumIndex];
-
-        for (const node of this.targetSelection) {
-            if (node.datum === datum) {
-                const bounds = node.node;
-                return { bounds, showFocusBox: true, clipFocusBox: true, datum, datumIndex };
-            }
-        }
+        return pickGaugeFocus(this, opts);
     }
 
     getCaptionText(): string {

packages/ag-charts-enterprise/src/series/radial-gauge/radialGaugeSeries.ts

@@ -9,6 +9,7 @@ import {
     _ModuleSupport,
 } from 'ag-charts-community';
 
+import { pickGaugeFocus } from '../gauge-util/focus';
 import { fadeInFns, formatLabel, getLabelText } from '../gauge-util/label';
 import { lineMarker } from '../gauge-util/lineMarker';
 import { type UnknownGaugeNodeDatum, parseUnknownGaugeNodeDatum } from '../gauge-util/properties';
@@ -169,15 +170,15 @@ export class RadialGaugeSeries
         this.scaleGroup,
         () => this.nodeFactory()
     );
-    private datumSelection: _ModuleSupport.Selection<_ModuleSupport.Sector, RadialGaugeNodeDatum> = Selection.select(
+    public datumSelection: _ModuleSupport.Selection<_ModuleSupport.Sector, RadialGaugeNodeDatum> = Selection.select(
         this.itemGroup,
         () => this.nodeFactory()
     );
     private needleSelection: _ModuleSupport.Selection<RadialGaugeNeedle, RadialGaugeNeedleDatum> = Selection.select(
         this.itemNeedleGroup,
         RadialGaugeNeedle
     );
-    private targetSelection: _ModuleSupport.Selection<_ModuleSupport.Marker, RadialGaugeTargetDatum> = Selection.select(
+    public targetSelection: _ModuleSupport.Selection<_ModuleSupport.Marker, RadialGaugeTargetDatum> = Selection.select(
         this.itemTargetGroup,
         () => this.markerFactory()
     );
@@ -456,7 +457,7 @@ export class RadialGaugeSeries
         const maxTicks = Math.ceil(normalizeAngle360Inclusive(containerEndAngle - containerStartAngle) * radius);
         let segments = segmentation.enabled ? segmentation.interval.getSegments(angleAxis.scale, maxTicks) : undefined;
 
-        const barFill = bar.fill ?? this.createConicGradient(bar.fills, bar.fillMode);
+        const barFill = !bar.enabled ? 'rgba(0,0,0,0)' : bar.fill ?? this.createConicGradient(bar.fills, bar.fillMode);
         const scaleFill =
             scale.fill ??
             (bar.enabled && scale.fills.length === 0 ? scale.defaultFill : undefined) ??
@@ -468,26 +469,24 @@ export class RadialGaugeSeries
             const appliedCornerRadius = Math.min(cornerRadius, (outerRadius - innerRadius) / 2);
             const angleInset = appliedCornerRadius / ((innerRadius + outerRadius) / 2);
 
-            if (bar.enabled) {
-                nodeData.push({
-                    series: this,
-                    itemId: `value`,
-                    datum,
-                    datumIndex: { type: NodeDataType.Node },
-                    type: NodeDataType.Node,
-                    centerX,
-                    centerY,
-                    outerRadius,
-                    innerRadius,
-                    startAngle: containerStartAngle - angleInset,
-                    endAngle: containerEndAngle + angleInset,
-                    clipStartAngle: undefined,
-                    clipEndAngle: undefined,
-                    startCornerRadius: cornerRadius,
-                    endCornerRadius: cornerRadius,
-                    fill: barFill,
-                });
-            }
+            nodeData.push({
+                series: this,
+                itemId: `value`,
+                datum,
+                datumIndex: { type: NodeDataType.Node },
+                type: NodeDataType.Node,
+                centerX,
+                centerY,
+                outerRadius,
+                innerRadius,
+                startAngle: containerStartAngle - angleInset,
+                endAngle: containerEndAngle + angleInset,
+                clipStartAngle: undefined,
+                clipEndAngle: undefined,
+                startCornerRadius: cornerRadius,
+                endCornerRadius: cornerRadius,
+                fill: barFill,
+            });
 
             scaleData.push({
                 series: this,
@@ -521,26 +520,24 @@ export class RadialGaugeSeries
                 const itemStartAngle = angleScale.convert(segmentStart);
                 const itemEndAngle = angleScale.convert(segmentEnd);
 
-                if (bar.enabled) {
-                    nodeData.push({
-                        series: this,
-                        itemId: `value-${i}`,
-                        datum,
-                        datumIndex: { type: NodeDataType.Node },
-                        type: NodeDataType.Node,
-                        centerX,
-                        centerY,
-                        outerRadius,
-                        innerRadius,
-                        startAngle: itemStartAngle,
-                        endAngle: itemEndAngle,
-                        clipStartAngle: containerStartAngle,
-                        clipEndAngle: containerEndAngle,
-                        startCornerRadius: cornersOnAllItems || isStart ? cornerRadius : 0,
-                        endCornerRadius: cornersOnAllItems || isEnd ? cornerRadius : 0,
-                        fill: barFill,
-                    });
-                }
+                nodeData.push({
+                    series: this,
+                    itemId: `value-${i}`,
+                    datum,
+                    datumIndex: { type: NodeDataType.Node },
+                    type: NodeDataType.Node,
+                    centerX,
+                    centerY,
+                    outerRadius,
+                    innerRadius,
+                    startAngle: itemStartAngle,
+                    endAngle: itemEndAngle,
+                    clipStartAngle: containerStartAngle,
+                    clipEndAngle: containerEndAngle,
+                    startCornerRadius: cornersOnAllItems || isStart ? cornerRadius : 0,
+                    endCornerRadius: cornersOnAllItems || isEnd ? cornerRadius : 0,
+                    fill: barFill,
+                });
 
                 scaleData.push({
                     series: this,
@@ -1162,19 +1159,7 @@ export class RadialGaugeSeries
     }
 
     override pickFocus(opts: _ModuleSupport.PickFocusInputs): _ModuleSupport.PickFocusOutputs | undefined {
-        const targetData = this.contextNodeData?.targetData;
-        if (targetData == null || targetData.length === 0) return;
-
-        const datumIndex = Math.min(Math.max(opts.datumIndex, 0), targetData.length - 1);
-
-        const datum = targetData[datumIndex];
-
-        for (const node of this.targetSelection) {
-            if (node.datum === datum) {
-                const bounds = node.node;
-                return { bounds, showFocusBox: true, clipFocusBox: true, datum, datumIndex };
-            }
-        }
+        return pickGaugeFocus(this, opts);
     }
 
     getCaptionText(): string {

packages/ag-charts-website/e2e/keyboard-nav.spec.ts

@@ -221,4 +221,72 @@ test.describe('keyboard-nav', () => {
         await page.keyboard.press('ArrowDown');
         await expect(page.locator(SELECTORS.canvasCenter)).toHaveScreenshot(`sankey-link-highlight.png`);
     });
+
+    test('gauge chart', async ({ page }) => {
+        const { url } = toExamplePageUrl('linear-gauge', 'custom-targets', 'vanilla');
+
+        await gotoExample(page, url);
+
+        await page.locator(SELECTORS.canvasCenter).first().click();
+
+        await page.keyboard.press('ArrowUp'); // should make the focus indicator appear
+        await page.keyboard.press('ArrowUp'); // should have no effect
+        await expect(page.locator(SELECTORS.canvasCenter)).toHaveScreenshot(`linear-gauge-bar-highlight.png`);
+
+        await page.keyboard.press('ArrowDown');
+        await expect(page.locator(SELECTORS.canvasCenter)).toHaveScreenshot(`linear-gauge-target0-highlight.png`);
+
+        await page.keyboard.press('ArrowRight');
+        await page.keyboard.press('ArrowRight');
+        await expect(page.locator(SELECTORS.canvasCenter)).toHaveScreenshot(`linear-gauge-target2-highlight.png`);
+
+        await page.keyboard.press('ArrowLeft');
+        await page.keyboard.press('ArrowLeft');
+        await page.keyboard.press('ArrowLeft'); // should have no effect
+        await expect(page.locator(SELECTORS.canvasCenter)).toHaveScreenshot(`linear-gauge-target0-highlight.png`);
+
+        await page.keyboard.press('ArrowDown'); // should have no effect
+        await page.keyboard.press('ArrowUp');
+        await expect(page.locator(SELECTORS.canvasCenter)).toHaveScreenshot(`linear-gauge-bar-highlight.png`);
+    });
+
+    test('radial gauge chart with needle', async ({ page }) => {
+        const { url } = toExamplePageUrl('radial-gauge', 'needle', 'vanilla');
+
+        await gotoExample(page, url);
+
+        const canvas = page.locator(SELECTORS.canvasCenter).first();
+        const hideNeedle = page.getByText('Hide Needle').first();
+        const showNeedle = page.getByText('Show Needle').first();
+        const hideBar = page.getByText('Hide Bar').first();
+        const showBar = page.getByText('Show Bar').first();
+
+        await canvas.click();
+        await page.keyboard.press('ArrowLeft');
+        await expect(canvas).toHaveScreenshot(`radial-gauge-showNeedle-hideBar.png`);
+
+        await hideNeedle.click();
+        await hideBar.click();
+        await canvas.click();
+        await page.keyboard.press('ArrowLeft');
+        await expect(canvas).toHaveScreenshot(`radial-gauge-hideNeedle-hideBar.png`);
+
+        await hideNeedle.click();
+        await showBar.click();
+        await canvas.click();
+        await page.keyboard.press('ArrowLeft');
+        await expect(canvas).toHaveScreenshot(`radial-gauge-hideNeedle-showBar.png`);
+
+        await showNeedle.click();
+        await hideBar.click();
+        await canvas.click();
+        await page.keyboard.press('ArrowLeft');
+        await expect(canvas).toHaveScreenshot(`radial-gauge-showNeedle-hideBar.png`);
+
+        await showNeedle.click();
+        await showBar.click();
+        await canvas.click();
+        await page.keyboard.press('ArrowLeft');
+        await expect(canvas).toHaveScreenshot(`radial-gauge-showNeedle-showBar.png`);
+    });
 });