Merge pull request 'better tooltips for markers' (#68) from better-markers-tooltips into main

Reviewed-on: #68

examples/markers.html

@@ -13,9 +13,18 @@
       const startTime = 1701790172908;
       const timeSerieData = [5, 6, 3, 7, 5, 6, 8, 4, 5, 6, 4, 3, 5, 7, 8]
         .map((el, idx) => [startTime + idx * 1000, el]);
-      // TODO: make this one-dimensinal data when implemented
-      const markersData1 = [3, 6, 9].map(el => [startTime + el * 1000]);
-      const markersData2 = [4, 11].map(el => [startTime + el * 1000]);
+      const markersData1 = [3, 6, 9].map(el => ({
+        x: startTime + el * 1000,
+        color: 'red',
+        alwaysDisplay: false,
+        html: new Date(startTime).toISOString(),
+      }));
+      const markersData2 = [4, 11].map(el => ({
+        x: startTime + el * 1000,
+        color: 'blue',
+        alwaysDisplay: true,
+        html: new Date(startTime).toISOString(),
+      }));
       let options = {
         renderLegend: false,
         axis: {
@@ -31,8 +40,8 @@
         options,
         {
           series: [
-            { data: markersData1, color: 'red' },
-            { data: markersData2, color: 'blue' },
+            { data: markersData1 },
+            { data: markersData2 },
           ]
         }
       );

examples/markers_select.html

@@ -13,11 +13,11 @@
       const startTime = 1701790172908;
       const timeSerieData = [5, 6, 3, 7, 5, 6, 8, 4, 5, 6, 4, 3, 5, 7, 8]
         .map((el, idx) => [startTime + idx * 1000, el]);
-      // TODO: make this one-dimensinal data when implemented
-      const markersData = [3, 6, 9].map(el => [
-        startTime + el * 1000,
-        { el }
-      ]);
+      const markersData = [3, 6, 9].map(el => ({
+        x: startTime + el * 1000,
+        payload: el,
+        color: 'red',
+      }));
       let options = {
         renderLegend: false,
         axis: {
@@ -33,7 +33,7 @@
         options,
         {
           series: [
-            { data: markersData, color: 'red' },
+            { data: markersData },
           ],
           events: {
             onMouseMove: (el) => { console.log(el); },

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@chartwerk/line-pod",
-  "version": "0.6.21",
+  "version": "0.7.0",
   "description": "Chartwerk line chart",
   "main": "dist/index.js",
   "files": [

src/components/markers.ts

@@ -1,33 +1,91 @@
-import { MarkersConf, MarkerSerie } from "../models/marker";
-import { PodState } from "@chartwerk/core";
-import { LineTimeSerie, LineOptions } from "../types";
+import { MarkerElem, MarkersConf, MarkerSerie } from '../models/marker';
+import { LineTimeSerie, LineOptions } from '../types';
 
-import d3 from "d3";
+import { PodState } from '@chartwerk/core';
+
+import d3 from 'd3';
 
 export class Markers {
-  // TODO: more semantic name
-  private _d3Holder = null;
+  private _layerContainer = null;
+  private _chartHeight = 0;
 
-  constructor(private _markerConf: MarkersConf, private _state: PodState<LineTimeSerie, LineOptions>) {
+  constructor(
+    private _chartContainer: d3.Selection<HTMLElement, unknown, null, undefined>,
+    private _markerConf: MarkersConf,
+    private _state: PodState<LineTimeSerie, LineOptions>
+  ) { }
 
+  clear() {
+    if(this._layerContainer !== null) {
+      this._layerContainer.remove();
+    }
+    this._chartContainer.selectAll('.marker-content').remove();
   }
 
-  render(metricContainer: d3.Selection<SVGGElement, unknown, null, undefined>) {
-    if(this._d3Holder !== null) {
-      this._d3Holder.remove();
+  render(metricContainer: d3.Selection<SVGGElement, unknown, null, undefined>, chartHeight: number) {
+    this._chartHeight = chartHeight;
+    this._layerContainer = metricContainer
+      .append('g')
+      .attr('class', 'markers-layer');
+    for(const serie of this._markerConf.series) {
+      this.renderSerie(serie);
     }
-    this._d3Holder = metricContainer.append('g').attr('class', 'markers-layer');
-    for (const ms of this._markerConf.series) {
-      this.renderSerie(ms);
   }
+
+  private _getLinePosition(marker: MarkerElem): number {
+    return this._state.xScale(marker.x);
   }
 
-  protected renderSerie(serie: MarkerSerie) {
-    serie.data.forEach((d) => {
-      let linePosition = this._state.xScale(d[0]) as number;
-      this._d3Holder.append('line')
+  private _renderCircle(marker: MarkerElem) {
+    const linePosition = this._getLinePosition(marker);
+
+    let circle = this._layerContainer.append('circle')
+      .attr('class', 'gap-circle')
+      .attr('stroke', marker.color)
+      .attr('stroke-width', '2px')
+      .attr('r', 4)
+      .attr('cx', linePosition)
+      .attr('cy', 5)
+
+    circle
+      .attr('pointer-events', 'all')
+      .style('cursor', 'pointer')
+      .on('mousemove', () => {
+        const onMouseMove = this._markerConf.events?.onMouseMove;
+        if(onMouseMove) {
+          onMouseMove(marker);
+          return
+        }
+        if(marker.alwaysDisplay) {
+          return;
+        }
+        this._chartContainer
+          .selectAll(`.marker-content-${marker.x}`)
+          .style('visibility', 'visible')
+          .style('z-index', 9999);
+      })
+      .on('mouseout', () => {
+        const onMouseOut = this._markerConf.events?.onMouseOut;
+        if(onMouseOut) {
+          onMouseOut()
+          return
+        }
+        if(marker.alwaysDisplay) {
+          return;
+        }
+        this._chartContainer
+          .selectAll(`.marker-content-${marker.x}`)
+          .style('visibility', 'hidden')
+          .style('z-index', 1);
+      });
+  }
+
+  private _renderLine(marker: MarkerElem) {
+    const linePosition = this._getLinePosition(marker);
+
+    this._layerContainer.append('line')
       .attr('class', 'gap-line')
-        .attr('stroke', serie.color)
+      .attr('stroke', marker.color)
       .attr('stroke-width', '1px')
       .attr('stroke-opacity', '0.3')
       .attr('stroke-dasharray', '4')
@@ -37,23 +95,43 @@ export class Markers {
       // @ts-ignore // TODO: remove ignore but boxParams are protected
       .attr('y2', this._state.boxParams.height)
       .attr('pointer-events', 'none');
-      let circle = this._d3Holder.append('circle')
-        .attr('class', 'gap-circle')
-        .attr('stroke', serie.color)
-        .attr('stroke-width', '2px')
-        .attr('r', 4)
-        .attr('cx', linePosition)
-        .attr('cy', 5)
+  }
 
-      if(this._markerConf !== undefined) {
-        circle
-          .attr('pointer-events', 'all')
-          .style('cursor', 'pointer')
-          .on('mousemove', () => this._markerConf.events.onMouseMove(d))
-          .on('mouseout', () => this._markerConf.events.onMouseOut())
+  private _renderTooltip(marker: MarkerElem) {
+    if(marker.html === undefined) {
+      return;
     }
 
-    });
+    const linePosition = this._getLinePosition(marker);
 
+    this._chartContainer
+      .append('div')
+      .attr('class', 'marker-content')
+      .attr('class', `marker-content-${marker.x}`)
+      // @ts-ignore // TODO: remove ignore but boxParams are protected
+      .style('top', `${this._state.boxParams.height - this._chartHeight}px`)
+      .style('left', `${linePosition + 50}px`)
+      .style('visibility', marker.alwaysDisplay ? 'visible' : 'hidden')
+      .style('position', 'absolute')
+      .style('border', '1px solid black')
+      .style('background-color', 'rgb(33, 37, 41)')
+      .style('color', 'rgb(255, 255, 255)')
+      .style('line-height', '1.55')
+      .style('font-size', '0.875rem')
+      .style('border-radius', '0.5rem')
+      .style('padding', 'calc(0.3125rem) 0.625rem')
+      .style('position', 'absolute')
+      .style('white-space', 'nowrap')
+      .style('pointer-events', 'none')
+      .style('z-index', 1)
+      .html(marker.html);
+  }
+
+  protected renderSerie(serie: MarkerSerie) {
+    serie.data.forEach((marker: MarkerElem) => {
+      this._renderLine(marker);
+      this._renderCircle(marker);
+      this._renderTooltip(marker);
+    });
   }
 }

src/index.ts

@@ -51,8 +51,8 @@ class LinePod extends ChartwerkPod<LineTimeSerie, LineOptions> {
       this._renderMetric(serie);
     }
     if(this._markersConf !== undefined) {
-      this._markersLayer = new Markers(this._markersConf, this.state);
-      this._markersLayer.render(this.metricContainer);
+      this._markersLayer = new Markers(this.d3Node, this._markersConf, this.state);
+      this._markersLayer.render(this.metricContainer, this.height);
     }
 
     this._segmentsLayer = new Segments(this._segmentSeries, this.state);
@@ -62,6 +62,7 @@ class LinePod extends ChartwerkPod<LineTimeSerie, LineOptions> {
   clearAllMetrics(): void {
     // TODO: temporary hack before it will be implemented in core.
     this.chartContainer.selectAll('.metric-el').remove();
+    this._markersLayer?.clear();
   }
 
   initLineGenerator(): void {

src/models/marker.ts

@@ -1,9 +1,13 @@
-export type MarkerElem = [number, any?];
+export type MarkerElem = {
+  x: number;
+  color: string;
+  html?: string;
+  alwaysDisplay?: boolean;
+  payload?: any;
+}
 
 export type MarkerSerie = {
-  color: string;
-  // TODO: make one-dimensional array with only x
-  data: MarkerElem[] // [x, payload] payload is any data for tooltip
+  data: MarkerElem[];
 }
 
 export type MarkersConf = {