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| "use client" | |
| import { useRef, useEffect } from "react" | |
| import * as d3 from "d3" | |
| export function D3Cell({ value, size = 160 }) { | |
| const containerRef = useRef(null) | |
| useEffect(() => { | |
| if (!containerRef.current) return | |
| const container = d3.select(containerRef.current) | |
| container.selectAll("*").remove() | |
| const glowPadding = size * 0.18 | |
| const totalW = size + glowPadding * 2 | |
| const totalH = size + glowPadding * 2 | |
| const rectX = glowPadding | |
| const rectY = glowPadding | |
| const rectW = size | |
| const rectH = size | |
| // Create SVG entirely via D3 -- no JSX svg element | |
| const svg = container | |
| .append("svg") | |
| .attr("width", totalW) | |
| .attr("height", totalH) | |
| .attr("viewBox", `0 0 ${totalW} ${totalH}`) | |
| .attr("overflow", "visible") | |
| .attr("role", "img") | |
| .attr("aria-label", `Cell displaying value ${value}`) | |
| const defs = svg.append("defs") | |
| const uid = `cell-${Math.random().toString(36).slice(2, 9)}` | |
| // ── Horizontal gradient: pink left -> lavender right ── | |
| const fillGrad = defs | |
| .append("linearGradient") | |
| .attr("id", `${uid}-fill`) | |
| .attr("x1", "0%") | |
| .attr("y1", "0%") | |
| .attr("x2", "100%") | |
| .attr("y2", "0%") | |
| fillGrad.append("stop").attr("offset", "0%").attr("stop-color", "#e86cc8") | |
| fillGrad.append("stop").attr("offset", "30%").attr("stop-color", "#df8ed4") | |
| fillGrad.append("stop").attr("offset", "60%").attr("stop-color", "#c98ec8") | |
| fillGrad.append("stop").attr("offset", "100%").attr("stop-color", "#c9a0d0") | |
| // ── Vertical overlay for depth ── | |
| const overlayGrad = defs | |
| .append("linearGradient") | |
| .attr("id", `${uid}-overlay`) | |
| .attr("x1", "0%") | |
| .attr("y1", "0%") | |
| .attr("x2", "0%") | |
| .attr("y2", "100%") | |
| overlayGrad | |
| .append("stop") | |
| .attr("offset", "0%") | |
| .attr("stop-color", "#ffc8f0") | |
| .attr("stop-opacity", 0.2) | |
| overlayGrad | |
| .append("stop") | |
| .attr("offset", "100%") | |
| .attr("stop-color", "#64288c") | |
| .attr("stop-opacity", 0.12) | |
| // ── Heavy blur filter for the fuzzy glow layer ── | |
| const blurFilter = defs | |
| .append("filter") | |
| .attr("id", `${uid}-blur`) | |
| .attr("x", "-50%") | |
| .attr("y", "-50%") | |
| .attr("width", "200%") | |
| .attr("height", "200%") | |
| blurFilter | |
| .append("feGaussianBlur") | |
| .attr("in", "SourceGraphic") | |
| .attr("stdDeviation", size * 0.08) | |
| // Parent group for all visible layers (used for blink animation) | |
| const cellGroup = svg.append("g").attr("opacity", 1) | |
| // ============================ | |
| // LAYER 1: Base sharp rectangle | |
| // ============================ | |
| const baseGroup = cellGroup.append("g") | |
| // Main gradient fill | |
| baseGroup | |
| .append("rect") | |
| .attr("x", rectX) | |
| .attr("y", rectY) | |
| .attr("width", rectW) | |
| .attr("height", rectH) | |
| .attr("rx", 2) | |
| .attr("ry", 2) | |
| .attr("fill", `url(#${uid}-fill)`) | |
| // Vertical overlay | |
| baseGroup | |
| .append("rect") | |
| .attr("x", rectX) | |
| .attr("y", rectY) | |
| .attr("width", rectW) | |
| .attr("height", rectH) | |
| .attr("rx", 2) | |
| .attr("ry", 2) | |
| .attr("fill", `url(#${uid}-overlay)`) | |
| // Thin magenta border | |
| baseGroup | |
| .append("rect") | |
| .attr("x", rectX) | |
| .attr("y", rectY) | |
| .attr("width", rectW) | |
| .attr("height", rectH) | |
| .attr("rx", 2) | |
| .attr("ry", 2) | |
| .attr("fill", "none") | |
| .attr("stroke", "#d946ef") | |
| .attr("stroke-width", 1.5) | |
| .attr("stroke-opacity", 0.9) | |
| // ==================================== | |
| // LAYER 2: Fuzzy blurred glow overlay | |
| // ==================================== | |
| const fuzzyGroup = cellGroup.append("g").attr("filter", `url(#${uid}-blur)`) | |
| // Blurred gradient rectangle | |
| fuzzyGroup | |
| .append("rect") | |
| .attr("x", rectX) | |
| .attr("y", rectY) | |
| .attr("width", rectW) | |
| .attr("height", rectH) | |
| .attr("rx", 2) | |
| .attr("ry", 2) | |
| .attr("fill", `url(#${uid}-fill)`) | |
| .attr("opacity", 0.3) | |
| // Blurred border stroke for extra edge glow | |
| fuzzyGroup | |
| .append("rect") | |
| .attr("x", rectX) | |
| .attr("y", rectY) | |
| .attr("width", rectW) | |
| .attr("height", rectH) | |
| .attr("rx", 2) | |
| .attr("ry", 2) | |
| .attr("fill", "none") | |
| .attr("stroke", "#d946ef") | |
| .attr("stroke-width", 3) | |
| .attr("opacity", 0.3) | |
| // ==================================== | |
| // LAYER 3: Crisp text on top | |
| // ==================================== | |
| cellGroup | |
| .append("text") | |
| .attr("x", rectX + rectW / 2) | |
| .attr("y", rectY + rectH / 2) | |
| .attr("text-anchor", "middle") | |
| .attr("dominant-baseline", "central") | |
| .attr("font-size", size * 0.2) | |
| .attr("font-family", "system-ui, -apple-system, sans-serif") | |
| .attr("font-weight", 400) | |
| .attr("fill", "#2a1a3e") | |
| .text(value) | |
| // ============================================================ | |
| // BLINK ANIMATION CYCLE | |
| // ============================================================ | |
| // | |
| // TIMING CONTROLS (all values in milliseconds): | |
| const ACTIVE_HOLD = 1500 // Step 1: How long the cell stays fully visible | |
| const FADE_OUT = 1000 // Step 2: Duration of the fade-out transition | |
| const CLEAR_HOLD = 100 // Step 3: How long the cell stays fully invisible | |
| const FADE_IN = 1000 // Step 4: Duration of the fade-in transition | |
| // | |
| // OPACITY CONTROLS: | |
| const ACTIVE_OPACITY = 1 // Opacity during active/visible state (0..1) | |
| const CLEAR_OPACITY = 0 // Opacity during clear/invisible state (0..1) | |
| // | |
| // EASING CONTROLS: | |
| // Available easings: d3.easeLinear, d3.easeCubicInOut, d3.easeQuadInOut, | |
| // d3.easeSinInOut, d3.easeExpInOut, d3.easeCircleInOut, d3.easeBounceOut | |
| const FADE_OUT_EASE = d3.easeCubicInOut // Easing curve for fade-out | |
| const FADE_IN_EASE = d3.easeCubicInOut // Easing curve for fade-in | |
| // | |
| // ============================================================ | |
| let cancelled = false | |
| function blinkCycle() { | |
| if (cancelled) return | |
| cellGroup | |
| .transition() | |
| // STEP 1: Hold active state | |
| .duration(0) | |
| .attr("opacity", ACTIVE_OPACITY) | |
| .delay(ACTIVE_HOLD) | |
| // STEP 2: Transition to clear state | |
| .transition() | |
| .duration(FADE_OUT) | |
| .ease(FADE_OUT_EASE) | |
| .attr("opacity", CLEAR_OPACITY) | |
| // STEP 3: Hold clear state | |
| .transition() | |
| .duration(0) | |
| .delay(CLEAR_HOLD) | |
| .attr("opacity", CLEAR_OPACITY) | |
| // STEP 4: Transition back to active state | |
| .transition() | |
| .duration(FADE_IN) | |
| .ease(FADE_IN_EASE) | |
| .attr("opacity", ACTIVE_OPACITY) | |
| .on("end", () => { | |
| if (!cancelled) blinkCycle() | |
| }) | |
| } | |
| blinkCycle() | |
| return () => { | |
| cancelled = true | |
| cellGroup.interrupt() | |
| } | |
| }, [value, size]) | |
| return <div ref={containerRef} /> | |
| } |
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