Geomap: Add Symbol Alignment Options (#74293)

* Geomap: Add Symbol Anchor Options

* Update displacement for svg case

* For square and x, account for 45 degree offset

* Simplify displacement function

* Remove unused todo

* Update test defaults to include anchor

* Add missing anchor default to tests

* Move displacement function into utils and add test

* Simplify anchor position options UX

* Change verbage to alignment and swap direction

* Include missing alignment rename

* Update tests

---------

Co-authored-by: nmarrs <nathanielmarrs@gmail.com>

public/app/plugins/panel/geomap/editor/StyleEditor.tsx

@@ -31,7 +31,15 @@ import {
 } from 'app/features/dimensions/editors';
 import { ResourceFolderName, defaultTextConfig, MediaType } from 'app/features/dimensions/types';
 
-import { defaultStyleConfig, GeometryTypeId, StyleConfig, TextAlignment, TextBaseline } from '../style/types';
+import {
+  HorizontalAlign,
+  VerticalAlign,
+  defaultStyleConfig,
+  GeometryTypeId,
+  StyleConfig,
+  TextAlignment,
+  TextBaseline,
+} from '../style/types';
 import { styleUsesText } from '../style/utils';
 import { LayerContentInfo } from '../utils/getFeatures';
 
@@ -101,6 +109,14 @@ export const StyleEditor = (props: Props) => {
     onChange({ ...value, textConfig: { ...value.textConfig, textBaseline: textBaseline } });
   };
 
+  const onAlignHorizontalChange = (alignHorizontal: HorizontalAlign) => {
+    onChange({ ...value, symbolAlign: { ...value.symbolAlign, horizontal: alignHorizontal } });
+  };
+
+  const onAlignVerticalChange = (alignVertical: VerticalAlign) => {
+    onChange({ ...value, symbolAlign: { ...value.symbolAlign, vertical: alignVertical } });
+  };
+
   const propertyOptions = useObservable(settings?.layerInfo ?? of());
   const featuresHavePoints = propertyOptions?.geometryType === GeometryTypeId.Point;
   const hasTextLabel = styleUsesText(value);
@@ -200,6 +216,7 @@ export const StyleEditor = (props: Props) => {
         />
       </Field>
       {!settings?.hideSymbol && (
+        <>
           <Field label={'Symbol'}>
             <ResourceDimensionEditor
               value={value?.symbol ?? defaultStyleConfig.symbol}
@@ -218,6 +235,29 @@ export const StyleEditor = (props: Props) => {
               }
             />
           </Field>
+          <Field label={'Symbol Vertical Align'}>
+            <RadioButtonGroup
+              value={value?.symbolAlign?.vertical ?? defaultStyleConfig.symbolAlign.vertical}
+              onChange={onAlignVerticalChange}
+              options={[
+                { value: VerticalAlign.Top, label: capitalize(VerticalAlign.Top) },
+                { value: VerticalAlign.Center, label: capitalize(VerticalAlign.Center) },
+                { value: VerticalAlign.Bottom, label: capitalize(VerticalAlign.Bottom) },
+              ]}
+            />
+          </Field>
+          <Field label={'Symbol Horizontal Align'}>
+            <RadioButtonGroup
+              value={value?.symbolAlign?.horizontal ?? defaultStyleConfig.symbolAlign.horizontal}
+              onChange={onAlignHorizontalChange}
+              options={[
+                { value: HorizontalAlign.Left, label: capitalize(HorizontalAlign.Left) },
+                { value: HorizontalAlign.Center, label: capitalize(HorizontalAlign.Center) },
+                { value: HorizontalAlign.Right, label: capitalize(HorizontalAlign.Right) },
+              ]}
+            />
+          </Field>
+        </>
       )}
       <Field label={'Color'}>
         <ColorDimensionEditor

public/app/plugins/panel/geomap/migrations.test.ts

@@ -79,6 +79,10 @@ describe('Worldmap Migrations', () => {
                     "fixed": "img/icons/marker/circle.svg",
                     "mode": "fixed",
                   },
+                  "symbolAlign": {
+                    "horizontal": "center",
+                    "vertical": "center",
+                  },
                   "textConfig": {
                     "fontSize": 12,
                     "offsetX": 0,
@@ -222,6 +226,10 @@ describe('geomap migrations', () => {
                     "fixed": "img/icons/marker/triangle.svg",
                     "mode": "fixed",
                   },
+                  "symbolAlign": {
+                    "horizontal": "center",
+                    "vertical": "center",
+                  },
                   "textConfig": {
                     "fontSize": 12,
                     "offsetX": 0,

public/app/plugins/panel/geomap/style/markers.ts

@@ -6,6 +6,7 @@ import { config } from '@grafana/runtime';
 import { getPublicOrAbsoluteUrl } from 'app/features/dimensions';
 
 import { defaultStyleConfig, DEFAULT_SIZE, StyleConfigValues, StyleMaker } from './types';
+import { getDisplacement } from './utils';
 
 interface SymbolMaker extends RegistryItem {
   aliasIds: string[];
@@ -80,11 +81,13 @@ export const textMarker = (cfg: StyleConfigValues) => {
 
 export const circleMarker = (cfg: StyleConfigValues) => {
   const stroke = new Stroke({ color: cfg.color, width: cfg.lineWidth ?? 1 });
+  const radius = cfg.size ?? DEFAULT_SIZE;
   return new Style({
     image: new Circle({
       stroke,
       fill: getFillColor(cfg),
-      radius: cfg.size ?? DEFAULT_SIZE,
+      radius,
+      displacement: getDisplacement(cfg.symbolAlign ?? defaultStyleConfig.symbolAlign, radius),
     }),
     text: textLabel(cfg),
     stroke, // in case lines are sent to the markers layer
@@ -153,7 +156,9 @@ const makers: SymbolMaker[] = [
           fill: getFillColor(cfg),
           points: 4,
           radius,
-          rotation: (rotation * Math.PI) / 180 + Math.PI / 4,
+          angle: Math.PI / 4,
+          rotation: (rotation * Math.PI) / 180,
+          displacement: getDisplacement(cfg.symbolAlign ?? defaultStyleConfig.symbolAlign, radius),
         }),
         text: textLabel(cfg),
       });
@@ -174,6 +179,7 @@ const makers: SymbolMaker[] = [
           radius,
           rotation: (rotation * Math.PI) / 180,
           angle: 0,
+          displacement: getDisplacement(cfg.symbolAlign ?? defaultStyleConfig.symbolAlign, radius),
         }),
         text: textLabel(cfg),
       });
@@ -195,6 +201,7 @@ const makers: SymbolMaker[] = [
           radius2: radius * 0.4,
           angle: 0,
           rotation: (rotation * Math.PI) / 180,
+          displacement: getDisplacement(cfg.symbolAlign ?? defaultStyleConfig.symbolAlign, radius),
         }),
         text: textLabel(cfg),
       });
@@ -215,6 +222,7 @@ const makers: SymbolMaker[] = [
           radius2: 0,
           angle: 0,
           rotation: (rotation * Math.PI) / 180,
+          displacement: getDisplacement(cfg.symbolAlign ?? defaultStyleConfig.symbolAlign, radius),
         }),
         text: textLabel(cfg),
       });
@@ -233,7 +241,9 @@ const makers: SymbolMaker[] = [
           points: 4,
           radius,
           radius2: 0,
-          rotation: (rotation * Math.PI) / 180 + Math.PI / 4,
+          angle: Math.PI / 4,
+          rotation: (rotation * Math.PI) / 180,
+          displacement: getDisplacement(cfg.symbolAlign ?? defaultStyleConfig.symbolAlign, radius),
         }),
         text: textLabel(cfg),
       });
@@ -315,6 +325,7 @@ export async function getMarkerMaker(symbol?: string, hasTextLabel?: boolean): P
                   opacity: cfg.opacity ?? 1,
                   scale: (DEFAULT_SIZE + radius) / 100,
                   rotation: (rotation * Math.PI) / 180,
+                  displacement: getDisplacement(cfg.symbolAlign ?? defaultStyleConfig.symbolAlign, radius / 2),
                 }),
                 text: !cfg?.text ? undefined : textLabel(cfg),
               }),

public/app/plugins/panel/geomap/style/types.ts

@@ -29,6 +29,7 @@ export interface StyleConfig {
   // Used for points and dynamic text
   size?: ScaleDimensionConfig;
   symbol?: ResourceDimensionConfig;
+  symbolAlign?: SymbolAlign;
 
   // Can show markers and text together!
   text?: TextDimensionConfig;
@@ -50,6 +51,16 @@ export enum TextBaseline {
   Middle = 'middle',
   Bottom = 'bottom',
 }
+export enum HorizontalAlign {
+  Left = 'left',
+  Center = 'center',
+  Right = 'right',
+}
+export enum VerticalAlign {
+  Top = 'top',
+  Center = 'center',
+  Bottom = 'bottom',
+}
 
 export const defaultStyleConfig = Object.freeze({
   size: {
@@ -65,6 +76,10 @@ export const defaultStyleConfig = Object.freeze({
     mode: ResourceDimensionMode.Fixed,
     fixed: 'img/icons/marker/circle.svg',
   },
+  symbolAlign: {
+    horizontal: HorizontalAlign.Center,
+    vertical: VerticalAlign.Center,
+  },
   textConfig: {
     fontSize: 12,
     textAlign: TextAlignment.Center,
@@ -80,6 +95,11 @@ export const defaultStyleConfig = Object.freeze({
   },
 });
 
+export interface SymbolAlign {
+  horizontal?: HorizontalAlign;
+  vertical?: VerticalAlign;
+}
+
 /**
  * Static options for text display.  See:
  * https://openlayers.org/en/latest/apidoc/module-ol_style_Text.html
@@ -99,6 +119,7 @@ export interface StyleConfigValues {
   lineWidth?: number;
   size?: number;
   symbol?: string; // the point symbol
+  symbolAlign?: SymbolAlign;
   rotation?: number;
   text?: string;
 

public/app/plugins/panel/geomap/style/utils.test.ts

@@ -1,7 +1,7 @@
 import { ResourceDimensionMode } from '@grafana/schema';
 
-import { StyleConfig } from './types';
+import { HorizontalAlign, VerticalAlign, StyleConfig, SymbolAlign } from './types';
-import { getStyleConfigState } from './utils';
+import { getDisplacement, getStyleConfigState } from './utils';
 
 describe('style utils', () => {
   it('should fill in default values', async () => {
@@ -41,6 +41,10 @@ describe('style utils', () => {
           "opacity": 0.4,
           "rotation": 0,
           "size": 5,
+          "symbolAlign": {
+            "horizontal": "center",
+            "vertical": "center",
+          },
         },
         "config": null,
         "fields": {
@@ -52,4 +56,22 @@ describe('style utils', () => {
       }
     `);
   });
+  it('should return correct displacement array for top left', async () => {
+    const symbolAlign: SymbolAlign = { horizontal: HorizontalAlign.Left, vertical: VerticalAlign.Top };
+    const radius = 10;
+    const displacement = getDisplacement(symbolAlign, radius);
+    expect(displacement).toEqual([-10, 10]);
+  });
+  it('should return correct displacement array for bottom right', async () => {
+    const symbolAlign: SymbolAlign = { horizontal: HorizontalAlign.Right, vertical: VerticalAlign.Bottom };
+    const radius = 10;
+    const displacement = getDisplacement(symbolAlign, radius);
+    expect(displacement).toEqual([10, -10]);
+  });
+  it('should return correct displacement array for center center', async () => {
+    const symbolAlign: SymbolAlign = { horizontal: HorizontalAlign.Center, vertical: VerticalAlign.Center };
+    const radius = 10;
+    const displacement = getDisplacement(symbolAlign, radius);
+    expect(displacement).toEqual([0, 0]);
+  });
 });

public/app/plugins/panel/geomap/style/utils.ts

@@ -2,7 +2,15 @@ import { config } from '@grafana/runtime';
 import { TextDimensionMode } from '@grafana/schema';
 
 import { getMarkerMaker } from './markers';
-import { defaultStyleConfig, StyleConfig, StyleConfigFields, StyleConfigState } from './types';
+import {
+  HorizontalAlign,
+  VerticalAlign,
+  defaultStyleConfig,
+  StyleConfig,
+  StyleConfigFields,
+  StyleConfigState,
+  SymbolAlign,
+} from './types';
 
 /** Indicate if the style wants to show text values */
 export function styleUsesText(config: StyleConfig): boolean {
@@ -37,6 +45,7 @@ export async function getStyleConfigState(cfg?: StyleConfig): Promise<StyleConfi
       lineWidth: cfg.lineWidth ?? 1,
       size: cfg.size?.fixed ?? defaultStyleConfig.size.fixed,
       rotation: cfg.rotation?.fixed ?? defaultStyleConfig.rotation.fixed, // add ability follow path later
+      symbolAlign: cfg.symbolAlign ?? defaultStyleConfig.symbolAlign,
     },
     maker,
   };
@@ -66,3 +75,19 @@ export async function getStyleConfigState(cfg?: StyleConfig): Promise<StyleConfi
   }
   return state;
 }
+
+/** Return a displacment array depending on alignment and icon radius */
+export function getDisplacement(symbolAlign: SymbolAlign, radius: number) {
+  const displacement = [0, 0];
+  if (symbolAlign?.horizontal === HorizontalAlign.Left) {
+    displacement[0] = -radius;
+  } else if (symbolAlign?.horizontal === HorizontalAlign.Right) {
+    displacement[0] = radius;
+  }
+  if (symbolAlign?.vertical === VerticalAlign.Top) {
+    displacement[1] = radius;
+  } else if (symbolAlign?.vertical === VerticalAlign.Bottom) {
+    displacement[1] = -radius;
+  }
+  return displacement;
+}