react-financial-charts/lib/coordinates/EdgeCoordinateV2.js

React charts specific to finance.

import * as React from "react";
import { colorToRGBA, isDefined } from "../utils";
export function renderSVG(props) {
    const { className } = props;
    const edge = helper(props);
    if (edge === null) {
        return null;
    }
    let line;
    let coordinateBase;
    let coordinate;
    if (edge.line !== undefined && isDefined(edge.line)) {
        line = React.createElement("line", { className: "react-financial-charts-cross-hair", opacity: edge.line.opacity, stroke: edge.line.stroke, x1: edge.line.x1, y1: edge.line.y1, x2: edge.line.x2, y2: edge.line.y2 });
    }
    if (isDefined(edge.coordinateBase)) {
        const { rectWidth, rectHeight, arrowWidth } = edge.coordinateBase;
        const path = edge.orient === "left"
            ? `M0,0L0,${rectHeight}L${rectWidth},${rectHeight}L${rectWidth + arrowWidth},10L${rectWidth},0L0,0L0,0`
            : `M0,${arrowWidth}L${arrowWidth},${rectHeight}L${rectWidth + arrowWidth},${rectHeight}L${rectWidth + arrowWidth},0L${arrowWidth},0L0,${arrowWidth}`;
        coordinateBase = edge.orient === "left" || edge.orient === "right"
            ? React.createElement("g", { transform: `translate(${edge.coordinateBase.edgeXRect},${edge.coordinateBase.edgeYRect})` },
                React.createElement("path", { d: path, key: 1, className: "react-financial-charts-text-background", height: rectHeight, width: rectWidth, fill: edge.coordinateBase.fill, opacity: edge.coordinateBase.opacity }))
            : React.createElement("rect", { key: 1, className: "react-financial-charts-text-background", x: edge.coordinateBase.edgeXRect, y: edge.coordinateBase.edgeYRect, height: rectHeight, width: rectWidth, fill: edge.coordinateBase.fill, opacity: edge.coordinateBase.opacity });
        coordinate = (React.createElement("text", { key: 2, x: edge.coordinate.edgeXText, y: edge.coordinate.edgeYText, textAnchor: edge.coordinate.textAnchor, fontFamily: edge.coordinate.fontFamily, fontSize: edge.coordinate.fontSize, dy: ".32em", fill: edge.coordinate.textFill }, edge.coordinate.displayCoordinate));
    }
    return (React.createElement("g", { className: className },
        line,
        coordinateBase,
        coordinate));
}
function helper(props) {
    const { coordinate: displayCoordinate, show, type, orient, edgeAt, hideLine } = props;
    const { fill, opacity, fontFamily, fontSize, textFill, lineStroke, lineOpacity, arrowWidth } = props;
    const { rectWidth, rectHeight } = props;
    const { x1, y1, x2, y2, dx } = props;
    if (!show) {
        return null;
    }
    let edgeXRect;
    let edgeYRect;
    let edgeXText;
    let edgeYText;
    if (type === "horizontal") {
        edgeXRect = dx + ((orient === "right") ? edgeAt + 1 : edgeAt - rectWidth - arrowWidth - 1);
        edgeYRect = y1 - (rectHeight / 2);
        edgeXText = dx + ((orient === "right") ? edgeAt + (rectWidth / 2) + arrowWidth : edgeAt - (rectWidth / 2) - arrowWidth);
        edgeYText = y1;
    }
    else {
        edgeXRect = x1 - (rectWidth / 2);
        edgeYRect = (orient === "bottom") ? edgeAt : edgeAt - rectHeight;
        edgeXText = x1;
        edgeYText = (orient === "bottom") ? edgeAt + (rectHeight / 2) : edgeAt - (rectHeight / 2);
    }
    let coordinateBase;
    let coordinate;
    const textAnchor = "middle";
    if (isDefined(displayCoordinate)) {
        coordinateBase = {
            edgeXRect, edgeYRect, rectHeight, rectWidth, fill, opacity, arrowWidth,
        };
        coordinate = {
            edgeXText, edgeYText, textAnchor, fontFamily, fontSize, textFill, displayCoordinate,
        };
    }
    const line = hideLine ? undefined : {
        opacity: lineOpacity, stroke: lineStroke, x1, y1, x2, y2,
    };
    return {
        coordinateBase, coordinate, line, orient,
    };
}
export function drawOnCanvas(ctx, props) {
    const edge = helper(props);
    if (edge === null) {
        return;
    }
    if (isDefined(edge.coordinateBase)) {
        const { rectWidth, rectHeight, arrowWidth } = edge.coordinateBase;
        ctx.fillStyle = colorToRGBA(edge.coordinateBase.fill, edge.coordinateBase.opacity);
        const x = edge.coordinateBase.edgeXRect;
        const y = edge.coordinateBase.edgeYRect;
        ctx.beginPath();
        if (edge.orient === "right") {
            ctx.moveTo(x, y + rectHeight / 2);
            ctx.lineTo(x + arrowWidth, y);
            ctx.lineTo(x + rectWidth + arrowWidth, y);
            ctx.lineTo(x + rectWidth + arrowWidth, y + rectHeight);
            ctx.lineTo(x + arrowWidth, y + rectHeight);
            ctx.closePath();
        }
        else if (edge.orient === "left") {
            ctx.moveTo(x, y);
            ctx.lineTo(x + rectWidth, y);
            ctx.lineTo(x + rectWidth + arrowWidth, y + rectHeight / 2);
            ctx.lineTo(x + rectWidth, y + rectHeight);
            ctx.lineTo(x, y + rectHeight);
            ctx.closePath();
        }
        else {
            ctx.rect(x, y, rectWidth, rectHeight);
        }
        ctx.fill();
        ctx.font = `${edge.coordinate.fontSize}px ${edge.coordinate.fontFamily}`;
        ctx.fillStyle = edge.coordinate.textFill;
        ctx.textAlign = edge.coordinate.textAnchor === "middle" ? "center" : edge.coordinate.textAnchor;
        ctx.textBaseline = "middle";
        ctx.fillText(edge.coordinate.displayCoordinate, edge.coordinate.edgeXText, edge.coordinate.edgeYText);
    }
    if (edge.line !== undefined && isDefined(edge.line)) {
        ctx.strokeStyle = colorToRGBA(edge.line.stroke, edge.line.opacity);
        ctx.beginPath();
        ctx.moveTo(edge.line.x1, edge.line.y1);
        ctx.lineTo(edge.line.x2, edge.line.y2);
        ctx.stroke();
    }
}
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