Scatterplot/ Add basic chart with points

src/client/visualizations/scatterplot/point.tsx

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2017-2022 Allegro.pl
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import * as React from "react";
+
+import { Datum } from "plywood";
+import { ConcreteSeries } from "../../../common/models/series/concrete-series";
+import "./scatterplot.scss";
+
+import { LinearScale } from "../../utils/linear-scale/linear-scale";
+
+interface PointProps {
+  datum: Datum;
+  xScale: LinearScale;
+  yScale: LinearScale;
+  xSeries: ConcreteSeries;
+  ySeries: ConcreteSeries;
+}
+
+const POINT_RADIUS = 3;
+
+export const Point: React.SFC<PointProps> = ({ datum, xScale, yScale, xSeries, ySeries }) => {
+  const xValue = xSeries.selectValue(datum);
+  const yValue = ySeries.selectValue(datum);
+
+  return (<circle
+      cx={xScale(xValue)}
+      cy={yScale(yValue)}
+      r={POINT_RADIUS}
+      className="point"
+    />
+  );
+};

src/client/visualizations/scatterplot/scatterplot.scss

@@ -13,11 +13,47 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
+@import '../../imports';
+
 .scatterplot {
   .scatterplot-container {
     display: flex;
     flex-direction: column;
     justify-content: flex-start;
     align-items: center;
+    position: relative;
+  }
+
+  .axis {
+    pointer-events: none;
+
+    line.border {
+      stroke: $gray;
+    }
+
+    line.tick {
+      stroke: $gray;
+    }
+
+    .label {
+      @include css-variable(fill, text-medium);
+      font-size: 12px;
+      font-weight: 400;
+
+      &.axis-label-x {
+        text-anchor: middle;
+      }
+    }
+  }
+
+  .point {
+    @include css-variable(stroke, brand);
+    @include css-variable(fill, item-dimension);
+  }
+
+  .axis-title {
+    position: absolute;
+    font-weight: $bold;
   }
 }

src/client/visualizations/scatterplot/scatterplot.tsx

@@ -23,11 +23,55 @@ import {
   VisualizationProps
 } from "../../views/cube-view/center-panel/center-panel";
 
+import * as d3 from "d3";
+import { Datum } from "plywood";
+import { ConcreteSeries } from "../../../common/models/series/concrete-series";
+import { selectFirstSplitDatums } from "../../utils/dataset/selectors/selectors";
 import "./scatterplot.scss";
 
-const Scatterplot: React.SFC<ChartProps> = () => {
-  return <div className="scatterplot-container">
-    <h2>Scatterplot will be here</h2>
+import { Stage } from "../../../common/models/stage/stage";
+import { GridLines } from "../../components/grid-lines/grid-lines";
+import { pickTicks } from "../../utils/linear-scale/linear-scale";
+import { Point } from "./point";
+import { XAxis } from "./x-axis";
+import { YAxis } from "./y-axis";
+
+const TICK_SIZE = 10;
+const MARGIN = 40;
+const X_AXIS_HEIGHT = 50;
+const Y_AXIS_WIDTH = 50;
+
+const Scatterplot: React.SFC<ChartProps> = ({ data, essence, stage }) => {
+  const [xSeries, ySeries] = essence.getConcreteSeries().toArray();
+  const scatterplotData = selectFirstSplitDatums(data);
+  const xExtent = getExtent(scatterplotData, xSeries);
+  const yExtent = getExtent(scatterplotData, ySeries);
+
+  const plottingStage = calculatePlottingStage(stage);
+  const yScale = d3.scale.linear().domain(yExtent).nice().range([plottingStage.height, 0]);
+  const xScale = d3.scale.linear().domain(xExtent).nice().range([0, plottingStage.width]);
+  const xTicks = pickTicks(xScale, 10);
+  const yTicks = pickTicks(yScale, 10);
+
+  return <div className="scatterplot-container" style={stage.getWidthHeight()}>
+    <span className="axis-title" style={{ top: 10, left: 10 }}>{xSeries.title()}</span>
+    <span className="axis-title" style={{ bottom: 145, right: 10 }}>{ySeries.title()}</span>
+    <svg viewBox={stage.getViewBox()}>
+      <GridLines orientation={"vertical"} stage={plottingStage} ticks={xTicks} scale={xScale} />
+      <GridLines orientation={"horizontal"} stage={plottingStage} ticks={yTicks} scale={yScale} />
+      <XAxis scale={xScale} stage={calculateXAxisStage(plottingStage)} ticks={xTicks} formatter={xSeries.formatter()} tickSize={TICK_SIZE}/>
+      <YAxis
+        stage={calculateYAxisStage(plottingStage)}
+        ticks={yTicks}
+        tickSize={TICK_SIZE}
+        scale={yScale}
+        formatter={ySeries.formatter()} />
+      <g transform={plottingStage.getTransform()}>
+        {scatterplotData.map(datum => (
+          <Point datum={datum} xScale={xScale} yScale={yScale} xSeries={xSeries} ySeries={ySeries} key={`point-${datum.x}-${datum.y}`}/>
+        ))}
+      </g>
+    </svg>
   </div>;
 };
 
@@ -37,3 +81,35 @@ export function ScatterplotVisualization(props: VisualizationProps) {
     <ChartPanel {...props} queryFactory={makeQuery} chartComponent={Scatterplot}/>
   </React.Fragment>;
 }
+
+function getExtent(data: Datum[], series: ConcreteSeries): number[] {
+  const selectValues = (d: Datum) => series.selectValue(d);
+  return d3.extent(data, selectValues);
+}
+
+function calculatePlottingStage(stage: Stage): Stage {
+  return Stage.fromJS({
+    x: Y_AXIS_WIDTH + MARGIN,
+    y: MARGIN,
+    width: stage.width - Y_AXIS_WIDTH - 2 * MARGIN,
+    height: stage.height - X_AXIS_HEIGHT - 2 * MARGIN
+  });
+}
+
+function calculateXAxisStage(stage: Stage): Stage {
+  return Stage.fromJS({
+    x: Y_AXIS_WIDTH + MARGIN,
+    y: stage.height + MARGIN,
+    width: stage.width,
+    height: X_AXIS_HEIGHT
+  });
+}
+
+function calculateYAxisStage(stage: Stage): Stage {
+  return Stage.fromJS({
+    x: MARGIN,
+    y: MARGIN,
+    width: Y_AXIS_WIDTH,
+    height: stage.height
+  });
+}

src/client/visualizations/scatterplot/x-axis.tsx

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2017-2022 Allegro.pl
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import * as React from "react";
+
+import "./scatterplot.scss";
+
+import { Stage } from "../../../common/models/stage/stage";
+import { Unary } from "../../../common/utils/functional/functional";
+import { roundToHalfPx } from "../../utils/dom/dom";
+import { LinearScale } from "../../utils/linear-scale/linear-scale";
+
+const TEXT_OFFSET_X = 16;
+
+interface XAxisProps {
+  stage: Stage;
+  ticks: number[];
+  tickSize: number;
+  scale: LinearScale;
+  formatter: Unary<number, string>;
+}
+
+export const XAxis: React.SFC<XAxisProps> = ({ stage, ticks, scale, formatter, tickSize }) => {
+  const labelY = tickSize + TEXT_OFFSET_X;
+  const linePositionY = roundToHalfPx(0);
+  const lines = ticks.map((tick: number) => {
+    const x = roundToHalfPx(scale(tick));
+    return <line className="tick" key={String(tick)} x1={x} y1={0} x2={x} y2={tickSize} />;
+  });
+  const labels = ticks.map((tick: number) => {
+    const x = scale(tick);
+    return <text className="label axis-label-x" key={String(tick)} x={x} y={labelY}>{formatter(tick)}</text>;
+  });
+
+  return (<g className="axis" transform={stage.getTransform()}>
+    {lines}
+    {labels}
+    <line className="border" y1={linePositionY} y2={linePositionY} x1={0} x2={stage.width}/>
+  </g>);
+};

src/client/visualizations/scatterplot/y-axis.tsx

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2017-2022 Allegro.pl
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import * as React from "react";
+
+import "./scatterplot.scss";
+
+import { Stage } from "../../../common/models/stage/stage";
+import { Unary } from "../../../common/utils/functional/functional";
+import { roundToHalfPx } from "../../utils/dom/dom";
+import { LinearScale } from "../../utils/linear-scale/linear-scale";
+
+const TEXT_OFFSET_Y = 4;
+
+interface YAxisProps {
+  stage: Stage;
+  ticks: number[];
+  tickSize: number;
+  scale: LinearScale;
+  formatter: Unary<number, string>;
+}
+
+export const YAxis: React.SFC<YAxisProps> = ({ formatter, stage, tickSize, ticks, scale }) => {
+  const linePositionX = roundToHalfPx(stage.width);
+
+  const lines = ticks.map((tick: number) => {
+    const y = roundToHalfPx(scale(tick));
+    return <line className="tick" key={String(tick)} x1={stage.width - tickSize} y1={y} x2={stage.width} y2={y} />;
+  });
+
+  const labels = ticks.map((tick: number) => {
+    const y = scale(tick);
+    const labelX = y + TEXT_OFFSET_Y;
+    return <text className="label" key={String(tick)} x={0} y={labelX}>{formatter(tick)}</text>;
+  });
+
+  return <g className="axis" transform={stage.getTransform()}>
+    <line className="border" x1={linePositionX} y1={0} x2={linePositionX} y2={stage.height} />
+    {lines}
+    {labels}
+  </g>;
+};