feat(explore): heatmap tooltip trace links

static/app/components/charts/baseChart.tsx

@@ -764,6 +764,11 @@ const getTooltipStyles = (p: {theme: Theme}) => css`
     justify-content: flex-start;
     align-items: baseline;
   }
+  .tooltip-label-centered {
+    display: flex;
+    justify-content: center;
+    align-items: center;
+  }
   .tooltip-code-no-margin {
     padding-left: 0;
     margin-left: 0;

static/app/components/charts/components/tooltip.tsx

@@ -243,21 +243,6 @@ export function getFormatter({
           serie
         );
 
-        if (serie.seriesType === 'heatmap') {
-          const zAxisCountValue = (getSeriesValue(serie, 2) ?? 0).toString();
-          const yAxisValue = valueFormatter(
-            getSeriesValue(serie, 1),
-            serie.seriesName,
-            serie
-          );
-
-          acc.series.push(
-            `<div><span class="tooltip-label"><strong>${yAxisValue}</strong></span> ${zAxisCountValue}</div>`
-          );
-
-          return acc;
-        }
-
         const value = valueFormatter(getSeriesValue(serie, 1), serie.seriesName, serie);
 
         const marker = markerFormatter(serie.marker ?? '', serie.seriesName);

static/app/views/dashboards/widgets/heatMapWidget/heatMapWidgetVisualization.tsx

@@ -1,25 +1,32 @@
 import 'echarts/lib/chart/heatmap';
 
-import {useRef} from 'react';
+import {Fragment, useRef, type ReactNode} from 'react';
 import {useTheme} from '@emotion/react';
 import type {
   TooltipFormatterCallback,
   TopLevelFormatterParams,
 } from 'echarts/types/dist/shared';
 
 import {Flex} from '@sentry/scraps/layout';
+import {useRenderToString} from '@sentry/scraps/renderToString';
 
 import {BaseChart} from 'sentry/components/charts/baseChart';
-import {getFormatter} from 'sentry/components/charts/components/tooltip';
-import {isChartHovered, truncationFormatter} from 'sentry/components/charts/utils';
+import {defaultFormatAxisLabel} from 'sentry/components/charts/components/tooltip';
+import {isChartHovered} from 'sentry/components/charts/utils';
 import {usePageFilters} from 'sentry/components/pageFilters/usePageFilters';
+import {t} from 'sentry/locale';
 import type {ReactEchartsRef} from 'sentry/types/echarts';
+import {defined} from 'sentry/utils';
+import {formatAbbreviatedNumber} from 'sentry/utils/formatters';
+import {ECHARTS_MISSING_DATA_VALUE} from 'sentry/utils/timeSeries/timeSeriesItemToEChartsDataPoint';
+import {useOrganization} from 'sentry/utils/useOrganization';
 import {NO_PLOTTABLE_VALUES} from 'sentry/views/dashboards/widgets/common/settings';
 import {plottablesCanBeVisualized} from 'sentry/views/dashboards/widgets/plottablesCanBeVisualized';
 import {formatTooltipValue} from 'sentry/views/dashboards/widgets/timeSeriesWidget/formatters/formatTooltipValue';
 import {formatXAxisTimestamp} from 'sentry/views/dashboards/widgets/timeSeriesWidget/formatters/formatXAxisTimestamp';
 import {formatYAxisValue} from 'sentry/views/dashboards/widgets/timeSeriesWidget/formatters/formatYAxisValue';
 import {FALLBACK_TYPE} from 'sentry/views/dashboards/widgets/timeSeriesWidget/settings';
+import {getExploreUrl, type GetExploreUrlArgs} from 'sentry/views/explore/utils';
 
 import {HeatMap} from './plottables/heatMap';
 import type {HeatMapPlottable} from './plottables/heatMapPlottable';
@@ -34,11 +41,17 @@ interface HeatMapWidgetVisualizationProps {
    * Experimental! Specify the Z-axis scale type. Logarithmic scales can be much more useful for values with a high range.
    */
   scale?: 'linear' | 'log';
+  /**
+   * getExploreUrl props that will be used to generate an explore link for the tooltip. Omitting this will not generate an explore link.
+   */
+  tooltipExploreUrlArgs?: Omit<GetExploreUrlArgs, 'organization'>;
 }
 
 export function HeatMapWidgetVisualization(props: HeatMapWidgetVisualizationProps) {
   const {plottables} = props;
   const theme = useTheme();
+  const organization = useOrganization();
+  const renderToString = useRenderToString();
 
   const pageFilters = usePageFilters();
   const {start, end, period, utc} = pageFilters.selection.datetime;
@@ -68,43 +81,155 @@ export function HeatMapWidgetVisualization(props: HeatMapWidgetVisualizationProp
   const Zmax =
     scale === 'log' ? Math.log1p(heatMapPlottable.Zend) : heatMapPlottable.Zend;
 
+  /** Extract the numeric value from ECharts tooltip param.value. */
+  function extractValue(data: unknown): number | null {
+    // param.value can be either:
+    // 1. The numeric value directly (for heatmap charts with axis trigger)
+    // 2. An object {name, value} (depends on series config)
+    if (typeof data === 'number') {
+      return data;
+    }
+
+    const value = (data as {value?: unknown} | null | undefined)?.value;
+    return typeof value === 'number' ? value : null;
+  }
+
   // Create tooltip formatter
-  const formatTooltip: TooltipFormatterCallback<TopLevelFormatterParams> = (
-    params,
-    asyncTicket
-  ) => {
+  const formatTooltip: TooltipFormatterCallback<TopLevelFormatterParams> = params => {
     // Only show the tooltip of the current chart. Otherwise, all tooltips
     // in the chart group appear.
     if (!isChartHovered(chartRef?.current)) {
       return '';
     }
 
-    return getFormatter({
-      isGroupedByDate: true,
-      showTimeInTooltip: true,
-      nameFormatter: function (seriesName, _nameFormatterParams) {
-        return truncationFormatter(seriesName, true, false);
-      },
-      valueFormatter: function (value, _field, _valueFormatterParams) {
-        const bucketSize = heatMapPlottable.heatMapSeries.meta.yAxis.bucketSize;
-        const fieldType = heatMapPlottable?.yAxisValueType ?? FALLBACK_TYPE;
-
-        const yAxisMinValueFormatted = formatTooltipValue(
-          value,
-          fieldType,
-          heatMapPlottable.yAxisValueUnit ?? undefined
-        );
-        const yAxisMaxValueFormatted = formatTooltipValue(
-          value + bucketSize,
-          fieldType,
-          heatMapPlottable.yAxisValueUnit ?? undefined
-        );
-
-        return `${yAxisMinValueFormatted} – ${yAxisMaxValueFormatted}`;
-      },
-      truncate: false,
-      utc: utc ?? false,
-    })(params, asyncTicket);
+    const seriesParams = Array.isArray(params) ? params : [params];
+
+    // Filter null values from tooltip
+    const filteredParams = seriesParams.filter(param => {
+      // @ts-expect-error ECharts types param.value as unknown, but we know it's [xAxis, yAxis, zAxis] from our HeatMap plottable
+      const value = extractValue(param.value[2]);
+      return value !== null;
+    });
+
+    let formattedXValue = ECHARTS_MISSING_DATA_VALUE;
+
+    return renderToString(
+      <Fragment>
+        <div className="tooltip-series">
+          {filteredParams.map(param => {
+            const xAxisBucketSize = heatMapPlottable.heatMapSeries.meta.xAxis.bucketSize;
+            const yAxisBucketSize = heatMapPlottable.heatMapSeries.meta.yAxis.bucketSize;
+            const yAxisUnit = heatMapPlottable?.yAxisValueUnit;
+            const yAxisValueType = heatMapPlottable?.yAxisValueType ?? FALLBACK_TYPE;
+
+            let rawXValue: number | undefined;
+            let rawYValue: number | undefined;
+
+            let formattedYValue = ECHARTS_MISSING_DATA_VALUE;
+            let formattedZValue = ECHARTS_MISSING_DATA_VALUE;
+            if (Array.isArray(param.value) && param.value.length === 3) {
+              const [xValue, yValue, zValue] = param.value;
+
+              if (defined(xValue) && typeof xValue === 'number') {
+                rawXValue = xValue;
+                // bucket size seems to be in seconds but we need to convert to milliseconds
+                formattedXValue = defaultFormatAxisLabel(
+                  xValue,
+                  true,
+                  utc ?? false,
+                  true,
+                  false,
+                  xAxisBucketSize * 1000
+                ).toString();
+              }
+
+              if (defined(yValue) && typeof yValue === 'number') {
+                rawYValue = yValue;
+                const yAxisMinValueFormatted = formatTooltipValue(
+                  yValue,
+                  yAxisValueType,
+                  yAxisUnit ?? undefined
+                );
+
+                if (yAxisBucketSize === 0) {
+                  formattedYValue = yAxisMinValueFormatted;
+                } else {
+                  const yAxisMaxValueFormatted = formatTooltipValue(
+                    yValue + yAxisBucketSize,
+                    yAxisValueType,
+                    yAxisUnit ?? undefined
+                  );
+
+                  formattedYValue = `${yAxisMinValueFormatted} – ${yAxisMaxValueFormatted}`;
+                }
+              }
+
+              if (defined(zValue) && typeof zValue === 'number') {
+                formattedZValue = formatAbbreviatedNumber(zValue, 4, false);
+              }
+            }
+
+            let exploreLink: ReactNode;
+
+            if (defined(rawXValue) && defined(rawYValue) && props.tooltipExploreUrlArgs) {
+              const xAxisMaxValue = rawXValue + xAxisBucketSize * 1000;
+              const yAxisMaxValue = rawYValue + yAxisBucketSize;
+
+              const exploreUrlProps: GetExploreUrlArgs = {
+                organization,
+                ...props.tooltipExploreUrlArgs,
+                selection: {
+                  ...pageFilters.selection,
+                  datetime: {
+                    ...pageFilters.selection.datetime,
+                    start: new Date(rawXValue),
+                    end: new Date(xAxisMaxValue),
+                    period: null,
+                  },
+                },
+                // TODO(nikki): we're only handling metrics for now but if we're looking to support other explore
+                // surfaces then we'll need to add more logic here
+                crossEvents: props.tooltipExploreUrlArgs?.crossEvents?.map(crossEvent => {
+                  if (crossEvent.type === 'metrics') {
+                    return {
+                      ...crossEvent,
+                      query:
+                        yAxisBucketSize === 0
+                          ? `value:<=${rawYValue}`
+                          : `value:>=${rawYValue} value:<${yAxisMaxValue}`,
+                    };
+                  }
+                  return crossEvent;
+                }),
+              };
+
+              const tracesLink = getExploreUrl(exploreUrlProps);
+              exploreLink = <a href={tracesLink}>{t('View related traces')}</a>;
+            }
+
+            return (
+              <Fragment key={param.seriesIndex}>
+                <div>
+                  <span className="tooltip-label">
+                    <strong>{formattedYValue}</strong>
+                  </span>{' '}
+                  {formattedZValue}
+                </div>
+                {exploreLink && (
+                  <div>
+                    <span className="tooltip-label tooltip-label-centered">
+                      {exploreLink}
+                    </span>
+                  </div>
+                )}
+              </Fragment>
+            );
+          })}
+        </div>
+        <div className="tooltip-footer tooltip-footer-centered">{formattedXValue}</div>
+        <div className="tooltip-arrow" />
+      </Fragment>
+    );
   };
 
   return (
@@ -118,6 +243,8 @@ export function HeatMapWidgetVisualization(props: HeatMapWidgetVisualizationProp
         ref={chartRef}
         tooltip={{
           show: true,
+          enterable: true,
+          extraCssText: `box-shadow: 0 0 0 1px ${theme.tokens.border.transparent.neutral.muted}, ${theme.shadow.high}; z-index: ${theme.zIndex.tooltip} !important; pointer-events: auto !important;`,
           axisPointer: {
             show: false,
           },

static/app/views/dashboards/widgets/heatMapWidget/plottables/heatMap.tsx

@@ -49,7 +49,7 @@ export class HeatMap implements HeatMapPlottable {
 
   toSeries(plottingOptions: HeatMapPlottingOptions): SeriesOption[] {
     const {heatMapSeries} = this;
-    const {scale = 'linear'} = plottingOptions;
+    const {scale = 'linear', theme} = plottingOptions;
 
     return [
       {
@@ -64,7 +64,10 @@ export class HeatMap implements HeatMapPlottable {
           ];
         }),
         emphasis: {
-          disabled: true,
+          itemStyle: {
+            borderColor: theme.tokens.content.primary,
+            borderWidth: 2,
+          },
         },
       },
     ];

static/app/views/explore/metrics/metricsHeatMap.tsx

@@ -1,3 +1,4 @@
+import {useMemo} from 'react';
 import type {UseQueryResult} from '@tanstack/react-query';
 
 import {t} from 'sentry/locale';
@@ -12,9 +13,10 @@ import {
   useMetricName,
   useMetricVisualize,
   useMetricVisualizes,
+  useTraceMetric,
 } from 'sentry/views/explore/metrics/metricsQueryParams';
 import {STACKED_GRAPH_HEIGHT} from 'sentry/views/explore/metrics/settings';
-import {prettifyAggregation} from 'sentry/views/explore/utils';
+import {prettifyAggregation, type GetExploreUrlArgs} from 'sentry/views/explore/utils';
 
 interface MetricsHeatMapProps {
   actions: React.ReactNode;
@@ -27,6 +29,7 @@ export function MetricsHeatMap({heatmapResult, actions, title}: MetricsHeatMapPr
   const visualizes = useMetricVisualizes();
   const metricLabel = useMetricLabel();
   const metricName = useMetricName();
+  const metric = useTraceMetric();
 
   const {data: heatMapSeries, isPending, error} = heatmapResult;
 
@@ -36,6 +39,18 @@ export function MetricsHeatMap({heatmapResult, actions, title}: MetricsHeatMapPr
       ? metricName
       : (title ?? metricLabel ?? prettifyAggregation(aggregate) ?? aggregate);
 
+  const tooltipExploreUrlArgs: Omit<GetExploreUrlArgs, 'organization'> = useMemo(() => {
+    return {
+      crossEvents: [
+        {
+          type: 'metrics',
+          query: '',
+          metric,
+        },
+      ],
+    };
+  }, [metric]);
+
   return (
     <WidgetWrapper>
       <Widget
@@ -52,6 +67,7 @@ export function MetricsHeatMap({heatmapResult, actions, title}: MetricsHeatMapPr
             <HeatMapWidgetVisualization
               plottables={[new HeatMap(heatMapSeries)]}
               scale="log"
+              tooltipExploreUrlArgs={tooltipExploreUrlArgs}
             />
           )
         }