416 lines
23 KiB
TypeScript
416 lines
23 KiB
TypeScript
"use client";
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import { useCallback, useEffect, useRef, useState } from "react";
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import Link from "next/link";
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import { useRouter } from "next/navigation";
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import { loadProgressDrawing, saveProgressDrawing, saveFinalDrawing, fileToDataURL, loadDrawingAsLayer } from "./drawingPersistence";
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interface Meta { level: string; levelName: string; sublevel: number; title: string; emoji: string; intro: string; baseSvg: string; phaseLabel?: string; hintSvg?: string }
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const W = 880;
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const H = 660;
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const COLORS = ["#2b2440", "#4f7cff", "#34c6c6", "#58c777", "#ffc843", "#ff8a3d", "#ff7eb6", "#a06bff", "#8a5a2b", "#ffffff"];
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const SIZES = [8, 18, 36];
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type Tool = "pen" | "pencil" | "marker" | "eraser" | "fill";
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const TOOLS: { id: Tool; label: string; icon: string }[] = [
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{ id: "pen", label: "Pen", icon: "🖊️" },
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{ id: "pencil", label: "Pencil", icon: "✏️" },
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{ id: "marker", label: "Marker", icon: "🖍️" },
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{ id: "eraser", label: "Eraser", icon: "🧽" },
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{ id: "fill", label: "Fill", icon: "🪣" },
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];
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interface Layer { id: number; name: string; visible: boolean; canvas: HTMLCanvasElement }
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function hexToRgb(hex: string): [number, number, number] {
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const m = hex.replace("#", "");
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const n = m.length === 3 ? m.split("").map((c) => c + c).join("") : m;
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return [parseInt(n.slice(0, 2), 16), parseInt(n.slice(2, 4), 16), parseInt(n.slice(4, 6), 16)];
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}
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function newLayer(id: number, name: string): Layer {
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const c = document.createElement("canvas");
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c.width = W; c.height = H;
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return { id, name, visible: true, canvas: c };
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}
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export default function ColoringRunner({ meta, loggedIn, username, alreadyEarned, userSketch = "", carryImage = "" }: {
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meta: Meta; loggedIn: boolean; username: string; alreadyEarned: boolean; userSketch?: string; carryImage?: string;
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}) {
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const router = useRouter();
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const phaseLabel = meta.phaseLabel || "Color it!";
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// Which line art to color: the stock template or the child's own sketch.
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// If they have no sketch of their own, skip the choice and use the stock art.
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const [sketch, setSketch] = useState<"stock" | "yours" | null>(userSketch ? null : "stock");
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const [overlayUrl, setOverlayUrl] = useState<string>("");
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const [done, setDone] = useState(false);
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const [finalImage, setFinalImage] = useState<string | null>(null);
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const [uploadMsg, setUploadMsg] = useState("");
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const uploadRef = useRef<HTMLInputElement | null>(null);
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const dispRef = useRef<HTMLCanvasElement | null>(null);
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const boundaryRef = useRef<ImageData | null>(null);
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const templImgRef = useRef<HTMLImageElement | null>(null);
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const layersRef = useRef<Layer[]>([]);
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const layerSeq = useRef(2);
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const committedRef = useRef<ImageData | null>(null); // active layer before current stroke
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const undoRef = useRef<{ layerId: number; data: ImageData }[]>([]);
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const drawingRef = useRef<{ x: number; y: number }[] | null>(null);
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const pressureRef = useRef(0.7);
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const saveTimer = useRef<ReturnType<typeof setTimeout> | undefined>(undefined);
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const [, force] = useState(0);
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const [activeId, setActiveId] = useState(0);
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const [tool, setTool] = useState<Tool>("pen");
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const [color, setColor] = useState(COLORS[1]);
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const [size, setSize] = useState(SIZES[1]);
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const [opacity, setOpacity] = useState(1);
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const [custom, setCustom] = useState("#7ec86a");
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const layers = layersRef.current;
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const active = layers.find((l) => l.id === activeId) || layers[0];
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const composite = useCallback(() => {
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const disp = dispRef.current; if (!disp) return;
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const ctx = disp.getContext("2d")!;
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ctx.clearRect(0, 0, W, H);
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ctx.fillStyle = "#ffffff"; ctx.fillRect(0, 0, W, H);
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for (const l of layersRef.current) if (l.visible) ctx.drawImage(l.canvas, 0, 0);
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}, []);
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// Create the initial layers on the client (canvas needs the DOM, not the server).
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useEffect(() => {
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if (layersRef.current.length === 0) layersRef.current = [newLayer(0, "Color"), newLayer(1, "Top")];
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composite();
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force((n) => n + 1);
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}, [composite]);
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// Repaint when returning to the studio from the "done" screen
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useEffect(() => { if (!done) composite(); }, [done, composite]);
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// Build the line-art overlay (+ fill boundary + final export template) from the chosen source.
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// "stock" = the curriculum's template SVG; "yours" = the child's own sketch (white knocked out to transparent so coloring shows under the lines).
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useEffect(() => {
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if (!sketch) return;
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let alive = true;
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(async () => {
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let url: string;
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if (sketch === "yours" && userSketch) {
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const layer = await loadDrawingAsLayer(userSketch); // dark lines on transparent
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const c = document.createElement("canvas"); c.width = W; c.height = H;
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c.getContext("2d")!.drawImage(layer, 0, 0, W, H);
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url = c.toDataURL("image/png");
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} else {
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url = "data:image/svg+xml;utf8," + encodeURIComponent(`<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 400 300" width="${W}" height="${H}">${meta.baseSvg}</svg>`);
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}
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if (!alive) return;
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const img = new Image();
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img.onload = () => {
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if (!alive) return;
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templImgRef.current = img;
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const b = document.createElement("canvas"); b.width = W; b.height = H;
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const bctx = b.getContext("2d")!; bctx.drawImage(img, 0, 0, W, H);
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boundaryRef.current = bctx.getImageData(0, 0, W, H);
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setOverlayUrl(url);
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};
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img.src = url;
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})();
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return () => { alive = false; };
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}, [sketch, meta.baseSvg, userSketch]);
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// Restore saved coloring into the bottom layer; if none, seed with the carry image
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// (e.g. the Light phase starts from the colored drawing).
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useEffect(() => {
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let alive = true;
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const seed = (data: string) => {
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const im = new Image();
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im.onload = () => { if (alive) { layersRef.current[0]?.canvas.getContext("2d")!.drawImage(im, 0, 0, W, H); composite(); } };
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im.src = data;
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};
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if (!loggedIn) { if (carryImage) seed(carryImage); else composite(); return; }
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loadProgressDrawing(meta.level, meta.sublevel).then((data) => {
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if (!alive) return;
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if (data) seed(data);
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else if (carryImage) seed(carryImage);
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else composite();
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});
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return () => { alive = false; };
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}, [loggedIn, meta.level, meta.sublevel, composite, carryImage]);
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function flatten(withTemplate: boolean): string {
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const c = document.createElement("canvas"); c.width = W; c.height = H;
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const ctx = c.getContext("2d")!;
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ctx.fillStyle = "#ffffff"; ctx.fillRect(0, 0, W, H);
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for (const l of layersRef.current) if (l.visible) ctx.drawImage(l.canvas, 0, 0);
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if (withTemplate && templImgRef.current) ctx.drawImage(templImgRef.current, 0, 0, W, H);
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return c.toDataURL("image/png");
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}
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function hasContent() { return undoRef.current.length > 0; }
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function flushSave() { if (!loggedIn || !hasContent()) return; saveProgressDrawing(meta.level, meta.sublevel, flatten(false)); }
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function scheduleSave() { if (!loggedIn) return; clearTimeout(saveTimer.current); saveTimer.current = setTimeout(flushSave, 1200); }
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function pushUndo() {
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const ctx = active.canvas.getContext("2d")!;
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undoRef.current.push({ layerId: active.id, data: ctx.getImageData(0, 0, W, H) });
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if (undoRef.current.length > 8) undoRef.current.shift();
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}
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function undo() {
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const u = undoRef.current.pop(); if (!u) return;
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const l = layersRef.current.find((x) => x.id === u.layerId); if (!l) return;
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l.canvas.getContext("2d")!.putImageData(u.data, 0, 0);
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composite(); force((n) => n + 1); scheduleSave();
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}
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function clearActive() { pushUndo(); active.canvas.getContext("2d")!.clearRect(0, 0, W, H); composite(); force((n) => n + 1); scheduleSave(); }
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function pt(e: React.PointerEvent) {
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const r = dispRef.current!.getBoundingClientRect();
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return { x: ((e.clientX - r.left) / r.width) * W, y: ((e.clientY - r.top) / r.height) * H };
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}
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function strokeStyleFor(pressure: number) {
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const ctx = active.canvas.getContext("2d")!;
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if (tool === "eraser") { ctx.globalCompositeOperation = "destination-out"; ctx.globalAlpha = 1; ctx.strokeStyle = "#000"; ctx.lineWidth = size * 1.4; return; }
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ctx.globalCompositeOperation = "source-over";
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ctx.strokeStyle = color;
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if (tool === "pen") { ctx.globalAlpha = opacity; ctx.lineWidth = size; }
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else if (tool === "pencil") { ctx.globalAlpha = Math.min(1, opacity * 0.5 * (0.6 + pressure * 0.8)); ctx.lineWidth = size * 0.8; }
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else { ctx.globalAlpha = Math.min(1, opacity * 0.55 * (0.6 + pressure * 0.6)); ctx.lineWidth = size * 1.7; } // marker
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}
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function renderStroke() {
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const ctx = active.canvas.getContext("2d")!;
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if (committedRef.current) ctx.putImageData(committedRef.current, 0, 0);
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const pts = drawingRef.current!;
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if (!pts.length) return;
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ctx.save(); // isolate this stroke's tool settings so they can't leak to the next stroke
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strokeStyleFor(pressureRef.current);
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ctx.lineCap = "round"; ctx.lineJoin = "round";
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ctx.beginPath(); ctx.moveTo(pts[0].x, pts[0].y);
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if (pts.length === 1) ctx.lineTo(pts[0].x + 0.1, pts[0].y + 0.1);
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else for (let i = 1; i < pts.length; i++) ctx.lineTo(pts[i].x, pts[i].y);
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ctx.stroke();
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ctx.restore();
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composite();
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}
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function floodFill(x: number, y: number) {
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const bd = boundaryRef.current; if (!bd) return;
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pushUndo();
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const ctx = active.canvas.getContext("2d")!;
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const img = ctx.getImageData(0, 0, W, H); const d = img.data;
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const [fr, fg, fb] = hexToRgb(color);
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const isLine = (p: number) => bd.data[p * 4 + 3] > 60 && bd.data[p * 4] + bd.data[p * 4 + 1] + bd.data[p * 4 + 2] < 420;
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const sx = Math.round(x), sy = Math.round(y);
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if (sx < 0 || sy < 0 || sx >= W || sy >= H) return;
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const start = sy * W + sx;
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if (isLine(start)) return;
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const visited = new Uint8Array(W * H);
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const stack = [start];
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while (stack.length) {
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const p = stack.pop()!;
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if (visited[p]) continue; visited[p] = 1;
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if (isLine(p)) continue;
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const o = p * 4; d[o] = fr; d[o + 1] = fg; d[o + 2] = fb; d[o + 3] = 255;
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const px = p % W, py = (p / W) | 0;
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if (px > 0) stack.push(p - 1);
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if (px < W - 1) stack.push(p + 1);
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if (py > 0) stack.push(p - W);
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if (py < H - 1) stack.push(p + W);
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}
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ctx.putImageData(img, 0, 0);
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composite(); force((n) => n + 1); scheduleSave();
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}
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function onDown(e: React.PointerEvent) {
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(e.target as Element).setPointerCapture?.(e.pointerId);
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const p = pt(e);
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if (tool === "fill") { floodFill(p.x, p.y); return; }
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pushUndo();
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committedRef.current = active.canvas.getContext("2d")!.getImageData(0, 0, W, H);
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drawingRef.current = [p];
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pressureRef.current = e.pressure && e.pressure > 0 ? e.pressure : 0.7;
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renderStroke();
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}
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function onMove(e: React.PointerEvent) {
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if (!drawingRef.current) return;
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drawingRef.current.push(pt(e));
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pressureRef.current = e.pressure && e.pressure > 0 ? e.pressure : 0.7;
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renderStroke();
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}
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function onUp() { if (!drawingRef.current) return; drawingRef.current = null; committedRef.current = null; force((n) => n + 1); scheduleSave(); }
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// Layers panel actions
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function addLayer() { if (layers.length >= 4) return; const id = layerSeq.current++; layersRef.current.push(newLayer(id, `Layer ${layers.length + 1}`)); setActiveId(id); force((n) => n + 1); }
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function deleteLayer(id: number) {
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if (layersRef.current.length <= 1) return;
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layersRef.current = layersRef.current.filter((l) => l.id !== id);
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undoRef.current = undoRef.current.filter((u) => u.layerId !== id);
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if (activeId === id) setActiveId(layersRef.current[layersRef.current.length - 1].id);
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composite(); force((n) => n + 1); scheduleSave();
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}
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function toggleVisible(id: number) { const l = layersRef.current.find((x) => x.id === id); if (l) { l.visible = !l.visible; composite(); force((n) => n + 1); scheduleSave(); } }
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async function finish() {
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// Record completion of the Color it! lesson so the Learn page can mark it Done.
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if (loggedIn) {
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try { await fetch("/api/progress", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ level: meta.level, sublevel: meta.sublevel, step: 1 }) }); } catch { /* */ }
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}
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if (hasContent()) { const data = flatten(true); setFinalImage(data); if (loggedIn) await saveFinalDrawing(meta.level, meta.sublevel, "canvas", data); }
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setDone(true);
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router.refresh(); // refresh cached Learn page with the new completion
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}
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async function onUpload(e: React.ChangeEvent<HTMLInputElement>) {
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const file = e.target.files?.[0]; if (!file) return;
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if (!loggedIn) { setUploadMsg("Log in to save to your gallery."); return; }
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setUploadMsg("Uploading…");
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try { const data = await fileToDataURL(file); const ok = await saveFinalDrawing(meta.level, meta.sublevel, "upload", data); setUploadMsg(ok ? "Saved to your gallery! 🖼️" : "Couldn't save that file."); }
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catch { setUploadMsg("Couldn't read that image."); }
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finally { if (uploadRef.current) uploadRef.current.value = ""; }
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}
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// Ask which line art to color before opening the studio (only when the child has a sketch of their own).
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if (sketch === null) {
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return (
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<div>
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<div className="muted" style={{ fontWeight: 700 }}>{meta.levelName} · {phaseLabel}</div>
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<h1 style={{ margin: "2px 0" }}>{meta.emoji} {meta.title}</h1>
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<p className="muted">Which drawing would you like to color in?</p>
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<div style={{ display: "grid", gap: 16, gridTemplateColumns: "repeat(auto-fit, minmax(240px, 1fr))", marginTop: 12 }}>
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<button onClick={() => setSketch("yours")} className="card" style={{ cursor: "pointer", textAlign: "center", border: "2px solid var(--line)" }}>
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<div style={{ background: "#fff", borderRadius: 12, border: "1px solid var(--line)", overflow: "hidden", aspectRatio: "4 / 3" }}>
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<img src={userSketch} alt="Your sketch" style={{ width: "100%", height: "100%", objectFit: "contain" }} />
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</div>
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<strong style={{ display: "block", marginTop: 10 }}>✏️ Use my sketch</strong>
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<span className="muted" style={{ fontSize: "0.85rem" }}>Color the drawing you made</span>
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</button>
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<button onClick={() => setSketch("stock")} className="card" style={{ cursor: "pointer", textAlign: "center", border: "2px solid var(--line)" }}>
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<div style={{ background: "#fff", borderRadius: 12, border: "1px solid var(--line)", overflow: "hidden", aspectRatio: "4 / 3" }}>
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<svg viewBox="0 0 400 300" style={{ width: "100%", height: "100%" }} dangerouslySetInnerHTML={{ __html: meta.baseSvg }} />
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</div>
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<strong style={{ display: "block", marginTop: 10 }}>🖼️ Use the stock picture</strong>
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<span className="muted" style={{ fontSize: "0.85rem" }}>Color our ready-made outline</span>
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</button>
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</div>
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</div>
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);
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}
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if (done) {
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return (
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<div className="form-narrow center">
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<div className="card">
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<h1>🎨 Beautiful!</h1>
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<p className="muted">You colored your {meta.title.replace(" · Color it!", "")}.</p>
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{finalImage && (
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<div style={{ marginTop: 12 }}>
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<img src={finalImage} alt="Your colored drawing" style={{ width: "100%", borderRadius: 12, border: "1px solid var(--line)" }} />
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<a className="btn secondary" href={finalImage} download={`drawit-${meta.level}-${meta.sublevel}.png`} style={{ marginTop: 10 }}>⬇ Download my drawing</a>
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</div>
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)}
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<div style={{ marginTop: 16 }}>
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<input ref={uploadRef} type="file" accept="image/*" onChange={onUpload} style={{ display: "none" }} />
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<button className="btn secondary" onClick={() => uploadRef.current?.click()}>📷 Upload a paper drawing</button>
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{uploadMsg && <p className="muted" style={{ marginTop: 8 }}>{uploadMsg}</p>}
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</div>
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<div className="row" style={{ justifyContent: "center", marginTop: 18 }}>
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{loggedIn && <Link className="btn ghost" href="/profile">🖼️ My drawings</Link>}
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<button className="btn ghost" onClick={() => { setDone(false); setFinalImage(null); setUploadMsg(""); }}>↺ Keep coloring</button>
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<Link className="btn ghost" href="/learn">Back to lessons</Link>
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</div>
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</div>
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</div>
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);
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}
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const swatch = (c: string, key: string) => (
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<button key={key} onClick={() => setColor(c)} aria-label={`Color ${c}`}
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style={{ width: 30, height: 30, borderRadius: "50%", background: c, border: color === c ? "3px solid var(--ink)" : "3px solid #fff", boxShadow: "0 0 0 1px var(--line)", cursor: "pointer" }} />
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);
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return (
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<div>
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<div className="row" style={{ justifyContent: "space-between", alignItems: "flex-start" }}>
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<div>
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<div className="muted" style={{ fontWeight: 700 }}>{meta.levelName} · {phaseLabel}</div>
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<h1 style={{ margin: "2px 0" }}>{meta.emoji} {meta.title}</h1>
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</div>
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<Link className="btn ghost" href={`/report?level=${meta.level}&sublevel=${meta.sublevel}`} style={{ minHeight: 40 }}>Report a problem</Link>
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</div>
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<p className="muted">{meta.intro}</p>
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<div style={{ display: "grid", gap: 16, gridTemplateColumns: "1fr", alignItems: "start" }}>
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<div>
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<div style={{ position: "relative", width: "100%", maxWidth: 660, margin: "0 auto", aspectRatio: "4 / 3", background: "#fff", border: "2px solid var(--line)", borderRadius: 16, overflow: "hidden" }} className="no-touch-scroll">
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<canvas ref={dispRef} width={W} height={H} onPointerDown={onDown} onPointerMove={onMove} onPointerUp={onUp} onPointerCancel={onUp}
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style={{ position: "absolute", inset: 0, width: "100%", height: "100%", touchAction: "none", cursor: tool === "fill" ? "pointer" : "crosshair" }} />
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{overlayUrl && <img src={overlayUrl} alt="" style={{ position: "absolute", inset: 0, width: "100%", height: "100%", objectFit: "fill", pointerEvents: "none" }} />}
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{meta.hintSvg && <svg viewBox="0 0 400 300" style={{ position: "absolute", inset: 0, width: "100%", height: "100%", pointerEvents: "none" }} dangerouslySetInnerHTML={{ __html: meta.hintSvg }} />}
|
||
</div>
|
||
|
||
{/* Tools */}
|
||
<div className="row" style={{ justifyContent: "center", marginTop: 12, gap: 8, flexWrap: "wrap" }}>
|
||
{TOOLS.map((t) => (
|
||
<button key={t.id} onClick={() => setTool(t.id)} title={t.label}
|
||
style={{ minHeight: 40, padding: "6px 12px", borderRadius: 10, border: "2px solid var(--line)", cursor: "pointer", fontWeight: 700, fontSize: "0.85rem", background: tool === t.id ? "var(--primary)" : "#fff", color: tool === t.id ? "#fff" : "var(--ink)" }}>
|
||
{t.icon} {t.label}
|
||
</button>
|
||
))}
|
||
</div>
|
||
|
||
{/* Sizes + opacity */}
|
||
<div className="row" style={{ justifyContent: "center", marginTop: 10, gap: 10, alignItems: "center", flexWrap: "wrap" }}>
|
||
{SIZES.map((s) => (
|
||
<button key={s} onClick={() => setSize(s)} aria-label={`Size ${s}`}
|
||
style={{ width: 36, height: 36, borderRadius: "50%", background: size === s ? "var(--primary)" : "#fff", border: "2px solid var(--line)", cursor: "pointer", display: "grid", placeItems: "center" }}>
|
||
<span style={{ width: s / 3, height: s / 3, borderRadius: "50%", background: size === s ? "#fff" : "var(--ink)" }} />
|
||
</button>
|
||
))}
|
||
<span style={{ width: 1, height: 28, background: "var(--line)" }} />
|
||
<label className="muted" style={{ fontSize: "0.82rem", fontWeight: 700 }}>Opacity
|
||
<input type="range" min={0.1} max={1} step={0.1} value={opacity} onChange={(e) => setOpacity(Number(e.target.value))} style={{ verticalAlign: "middle", marginLeft: 6, width: 90 }} />
|
||
</label>
|
||
<button className="btn secondary" style={miniBtn} onClick={undo}>↶ Undo</button>
|
||
<button className="btn secondary" style={miniBtn} onClick={clearActive}>🗑 Clear layer</button>
|
||
</div>
|
||
|
||
{/* Colors + custom */}
|
||
<div className="row" style={{ justifyContent: "center", marginTop: 10, gap: 8, alignItems: "center", flexWrap: "wrap" }}>
|
||
{COLORS.map((c, i) => swatch(c, "c" + i))}
|
||
<span style={{ width: 1, height: 28, background: "var(--line)" }} />
|
||
<label title="Create a color" style={{ display: "inline-flex", alignItems: "center", gap: 6, cursor: "pointer", fontSize: "0.82rem", fontWeight: 700 }} className="muted">
|
||
➕ New color
|
||
<input type="color" value={custom} onChange={(e) => { setCustom(e.target.value); setColor(e.target.value); }} style={{ width: 30, height: 30, border: "none", background: "none", cursor: "pointer" }} />
|
||
</label>
|
||
</div>
|
||
</div>
|
||
|
||
{/* Layers + finish */}
|
||
<div className="card">
|
||
<div className="row" style={{ justifyContent: "space-between", alignItems: "center" }}>
|
||
<strong>Layers</strong>
|
||
<button className="btn secondary" style={miniBtn} onClick={addLayer} disabled={layers.length >= 4}>+ Add</button>
|
||
</div>
|
||
<div className="stack" style={{ marginTop: 8 }}>
|
||
{[...layers].reverse().map((l) => (
|
||
<div key={l.id} className="row" style={{ justifyContent: "space-between", alignItems: "center", border: l.id === activeId ? "2px solid var(--primary)" : "2px solid var(--line)", borderRadius: 10, padding: "6px 10px" }}>
|
||
<button onClick={() => setActiveId(l.id)} style={{ background: "none", border: "none", cursor: "pointer", fontWeight: l.id === activeId ? 800 : 600, color: "var(--ink)" }}>
|
||
{l.id === activeId ? "✏️ " : ""}{l.name}
|
||
</button>
|
||
<span className="row" style={{ gap: 4 }}>
|
||
<button onClick={() => toggleVisible(l.id)} title="Show/hide" style={iconBtn}>{l.visible ? "👁️" : "🙈"}</button>
|
||
<button onClick={() => deleteLayer(l.id)} title="Delete layer" disabled={layers.length <= 1} style={iconBtn}>🗑️</button>
|
||
</span>
|
||
</div>
|
||
))}
|
||
</div>
|
||
<p className="muted" style={{ fontSize: "0.8rem", marginTop: 8 }}>
|
||
Color on the bottom layer, shade on a layer above. Lower the opacity and use the pencil or marker to layer and shade.
|
||
{loggedIn && " Saved automatically."}
|
||
</p>
|
||
<button className="btn big" onClick={finish} style={{ width: "100%", marginTop: 8 }}>✓ I'm done — save it</button>
|
||
{!loggedIn && <p className="muted center" style={{ marginTop: 10, fontSize: "0.9rem" }}><Link href="/login">Log in</Link> to keep your drawing.</p>}
|
||
</div>
|
||
</div>
|
||
</div>
|
||
);
|
||
}
|
||
|
||
const miniBtn: React.CSSProperties = { minHeight: 34, padding: "6px 12px", fontSize: "0.85rem", boxShadow: "none" };
|
||
const iconBtn: React.CSSProperties = { background: "none", border: "none", cursor: "pointer", fontSize: "1rem", padding: 2 };
|