GraphNG: support auto and explicit axis width (#29553)

* auto axis

* auto axis

* expand everyhting with the same scale/unit

* expand everyhting with the same scale/unit

packages/grafana-ui/src/components/GraphNG/GraphNG.tsx

@@ -114,14 +114,15 @@ export const GraphNG: React.FC<GraphNGProps> = ({
       }
 
       const fmt = field.display ?? defaultFormatter;
-      const scale = config.unit || '__fixed';
+      const scaleKey = config.unit || '__fixed';
-      const isNewScale = !builder.hasScale(scale);
 
-      if (isNewScale && customConfig.axisPlacement !== AxisPlacement.Hidden) {
+      if (customConfig.axisPlacement !== AxisPlacement.Hidden) {
-        builder.addScale({ scaleKey: scale, min: field.config.min, max: field.config.max });
+        // The builder will manage unique scaleKeys and combine where appropriate
+        builder.addScale({ scaleKey, min: field.config.min, max: field.config.max });
         builder.addAxis({
-          scaleKey: scale,
+          scaleKey,
           label: customConfig.axisLabel,
+          size: customConfig.axisWidth,
           placement: customConfig.axisPlacement ?? AxisPlacement.Auto,
           formatValue: v => formattedValueToString(fmt(v)),
           theme,
@@ -136,7 +137,7 @@ export const GraphNG: React.FC<GraphNGProps> = ({
       const pointsMode = customConfig.mode === GraphMode.Points ? PointMode.Always : customConfig.points;
 
       builder.addSeries({
-        scaleKey: scale,
+        scaleKey,
         mode: customConfig.mode!,
         lineColor: seriesColor,
         lineWidth: customConfig.lineWidth,
@@ -149,7 +150,7 @@ export const GraphNG: React.FC<GraphNGProps> = ({
       });
 
       if (hasLegend.current) {
-        const axisPlacement = builder.getAxisPlacement(scale);
+        const axisPlacement = builder.getAxisPlacement(scaleKey);
 
         legendItems.push({
           color: seriesColor,

packages/grafana-ui/src/components/uPlot/config/UPlotAxisBuilder.ts

@@ -3,13 +3,14 @@ import uPlot, { Axis } from 'uplot';
 import { PlotConfigBuilder } from '../types';
 import { measureText } from '../../../utils/measureText';
 import { AxisPlacement } from '../config';
+import { optMinMax } from './UPlotScaleBuilder';
 
 export interface AxisProps {
   scaleKey: string;
   theme: GrafanaTheme;
   label?: string;
   show?: boolean;
-  size?: number;
+  size?: number | null;
   placement?: AxisPlacement;
   grid?: boolean;
   formatValue?: (v: any) => string;
@@ -19,6 +20,16 @@ export interface AxisProps {
 }
 
 export class UPlotAxisBuilder extends PlotConfigBuilder<AxisProps, Axis> {
+  merge(props: AxisProps) {
+    this.props.size = optMinMax('max', this.props.size, props.size);
+    if (!this.props.label) {
+      this.props.label = props.label;
+    }
+    if (this.props.placement === AxisPlacement.Auto) {
+      this.props.placement = props.placement;
+    }
+  }
+
   getConfig(): Axis {
     const {
       scaleKey,
@@ -42,7 +53,7 @@ export class UPlotAxisBuilder extends PlotConfigBuilder<AxisProps, Axis> {
       side: getUPlotSideFromAxis(placement),
       font: `12px 'Roboto'`,
       labelFont: `12px 'Roboto'`,
-      size: calculateAxisSize,
+      size: this.props.size ?? calculateAxisSize,
       grid: {
         show: grid,
         stroke: gridColor,
@@ -107,8 +118,7 @@ function calculateAxisSize(self: uPlot, values: string[], axisIdx: number) {
     }
   }
 
-  let axisWidth = measureText(maxLength, 12).width + 18;
+  return measureText(maxLength, 12).width + 18;
-  return axisWidth;
 }
 
 /** Format time axis ticks */

packages/grafana-ui/src/components/uPlot/config/UPlotConfigBuilder.test.ts

@@ -61,7 +61,6 @@ describe('UPlotConfigBuilder', () => {
       formatValue: () => 'test value',
       grid: false,
       show: true,
-      size: 1,
       theme: { isDark: true, palette: { gray25: '#ffffff' }, colors: { text: 'gray' } } as GrafanaTheme,
       values: [],
     });

packages/grafana-ui/src/components/uPlot/config/UPlotConfigBuilder.ts

@@ -8,13 +8,17 @@ export class UPlotConfigBuilder {
   private series: UPlotSeriesBuilder[] = [];
   private axes: Record<string, UPlotAxisBuilder> = {};
   private scales: UPlotScaleBuilder[] = [];
-  private registeredScales: string[] = [];
 
   hasLeftAxis = false;
 
   addAxis(props: AxisProps) {
     props.placement = props.placement ?? AxisPlacement.Auto;
 
+    if (this.axes[props.scaleKey]) {
+      this.axes[props.scaleKey].merge(props);
+      return;
+    }
+
     // Handle auto placement logic
     if (props.placement === AxisPlacement.Auto) {
       props.placement = this.hasLeftAxis ? AxisPlacement.Right : AxisPlacement.Left;
@@ -36,15 +40,16 @@ export class UPlotConfigBuilder {
     this.series.push(new UPlotSeriesBuilder(props));
   }
 
+  /** Add or update the scale with the scale key */
   addScale(props: ScaleProps) {
-    this.registeredScales.push(props.scaleKey);
+    const current = this.scales.find(v => v.props.scaleKey === props.scaleKey);
+    if (current) {
+      current.merge(props);
+      return;
+    }
     this.scales.push(new UPlotScaleBuilder(props));
   }
 
-  hasScale(scaleKey: string) {
-    return this.registeredScales.indexOf(scaleKey) > -1;
-  }
-
   getConfig() {
     const config: PlotSeriesConfig = { series: [{}] };
     config.axes = Object.values(this.axes).map(a => a.getConfig());

packages/grafana-ui/src/components/uPlot/config/UPlotScaleBuilder.test.ts

@@ -0,0 +1,21 @@
+import { optMinMax } from './UPlotScaleBuilder';
+
+describe('UPlotScaleBuilder', () => {
+  it('opt min max', () => {
+    expect(7).toEqual(optMinMax('min', null, 7));
+    expect(7).toEqual(optMinMax('min', undefined, 7));
+    expect(7).toEqual(optMinMax('min', 20, 7));
+
+    expect(7).toEqual(optMinMax('min', 7, null));
+    expect(7).toEqual(optMinMax('min', 7, undefined));
+    expect(7).toEqual(optMinMax('min', 7, 20));
+
+    expect(7).toEqual(optMinMax('max', null, 7));
+    expect(7).toEqual(optMinMax('max', undefined, 7));
+    expect(7).toEqual(optMinMax('max', 5, 7));
+
+    expect(7).toEqual(optMinMax('max', 7, null));
+    expect(7).toEqual(optMinMax('max', 7, undefined));
+    expect(7).toEqual(optMinMax('max', 7, 5));
+  });
+});

packages/grafana-ui/src/components/uPlot/config/UPlotScaleBuilder.ts

@@ -9,6 +9,11 @@ export interface ScaleProps {
 }
 
 export class UPlotScaleBuilder extends PlotConfigBuilder<ScaleProps, Scale> {
+  merge(props: ScaleProps) {
+    this.props.min = optMinMax('min', this.props.min, props.min);
+    this.props.max = optMinMax('max', this.props.max, props.max);
+  }
+
   getConfig() {
     const { isTime, scaleKey } = this.props;
     if (isTime) {
@@ -29,3 +34,18 @@ export class UPlotScaleBuilder extends PlotConfigBuilder<ScaleProps, Scale> {
     };
   }
 }
+
+export function optMinMax(minmax: 'min' | 'max', a?: number | null, b?: number | null): undefined | number | null {
+  const hasA = !(a === undefined || a === null);
+  const hasB = !(b === undefined || b === null);
+  if (hasA) {
+    if (!hasB) {
+      return a;
+    }
+    if (minmax === 'min') {
+      return a! < b! ? a : b;
+    }
+    return a! > b! ? a : b;
+  }
+  return b;
+}

public/app/plugins/panel/graph3/module.tsx

@@ -107,9 +107,8 @@ export const plugin = new PanelPlugin<Options, GraphFieldConfig>(GraphPanel)
           path: 'axisWidth',
           name: 'Width',
           category: ['Axis'],
-          defaultValue: 60,
           settings: {
-            placeholder: '60',
+            placeholder: 'Auto',
           },
           showIf: c => c.axisPlacement !== AxisPlacement.Hidden,
         });