From ed78532260a1e62e55eeea0af02d7cd39042d016 Mon Sep 17 00:00:00 2001
From: Ruslan Bakiev <572431+veikab@users.noreply.github.com>
Date: Mon, 23 Feb 2026 19:29:52 +0700
Subject: [PATCH] feat(calendar-lab): use tldraw canvas engine with nested zoom
 rectangles

---
 .../lab/CrmCalendarZoomTldrawLab.client.vue   | 340 ++++++++++++++++--
 frontend/app/pages/calendar-zoom-lab.vue      |   4 +-
 2 files changed, 319 insertions(+), 25 deletions(-)

diff --git a/frontend/app/components/workspace/calendar/lab/CrmCalendarZoomTldrawLab.client.vue b/frontend/app/components/workspace/calendar/lab/CrmCalendarZoomTldrawLab.client.vue
index 9242fe7..b3f05fc 100644
--- a/frontend/app/components/workspace/calendar/lab/CrmCalendarZoomTldrawLab.client.vue
+++ b/frontend/app/components/workspace/calendar/lab/CrmCalendarZoomTldrawLab.client.vue
@@ -1,29 +1,319 @@
 <script setup lang="ts">
-const tldrawUrl = "https://www.tldraw.com";
+import { computed, onBeforeUnmount, onMounted, ref } from "vue";
+
+type TldrawApi = {
+  Tldraw: unknown;
+  createShapeId: (seed?: string) => string;
+  toRichText: (text: string) => unknown;
+};
+
+type ShapeNode = {
+  id: string;
+  level: number;
+  parentId: string | null;
+  label: string;
+  bounds: { x: number; y: number; w: number; h: number };
+};
+
+const LEVEL_LABELS = ["year", "month", "week", "day"];
+const MONTH_LABELS = [
+  "January", "February", "March", "April",
+  "May", "June", "July", "August",
+  "September", "October", "November", "December",
+];
+const ZOOM_MS = 1100;
+
+const hostRef = ref<HTMLDivElement | null>(null);
+const status = ref("Loading tldraw engine...");
+
+const activeLevel = ref(0);
+const activeLabel = ref("Year 2026");
+
+const debugInfo = computed(() => `${LEVEL_LABELS[activeLevel.value] ?? "year"}: ${activeLabel.value}`);
+
+let reactRoot: { unmount: () => void } | null = null;
+let teardown: (() => void) | null = null;
+
+function ensureTldrawCss() {
+  if (document.querySelector("link[data-tldraw-css='1']")) return;
+  const link = document.createElement("link");
+  link.rel = "stylesheet";
+  link.href = "https://esm.sh/tldraw@4.4.0/tldraw.css";
+  link.setAttribute("data-tldraw-css", "1");
+  document.head.append(link);
+}
+
+function buildScene(api: TldrawApi) {
+  const nodes = new Map<string, ShapeNode>();
+  const children = new Map<string, string[]>();
+
+  const attachNode = (node: ShapeNode) => {
+    nodes.set(node.id, node);
+    if (!node.parentId) return;
+    if (!children.has(node.parentId)) children.set(node.parentId, []);
+    children.get(node.parentId)?.push(node.id);
+  };
+
+  const yearId = api.createShapeId("year-2026");
+  attachNode({
+    id: yearId,
+    level: 0,
+    parentId: null,
+    label: "Year 2026",
+    bounds: { x: 0, y: 0, w: 3200, h: 2200 },
+  });
+
+  const monthCols = 4;
+  const monthRows = 3;
+  const monthGap = 34;
+  const monthW = 730;
+  const monthH = 650;
+  const monthStartX = 70;
+  const monthStartY = 90;
+
+  for (let month = 0; month < 12; month += 1) {
+    const col = month % monthCols;
+    const row = Math.floor(month / monthCols) % monthRows;
+    const x = monthStartX + col * (monthW + monthGap);
+    const y = monthStartY + row * (monthH + monthGap);
+
+    const monthId = api.createShapeId(`month-${month + 1}`);
+    const monthLabel = MONTH_LABELS[month] ?? `Month ${month + 1}`;
+
+    attachNode({
+      id: monthId,
+      level: 1,
+      parentId: yearId,
+      label: monthLabel,
+      bounds: { x, y, w: monthW, h: monthH },
+    });
+
+    const weekGap = 10;
+    const weekRows = 6;
+    const weekX = x + 14;
+    const weekY = y + 54;
+    const weekW = monthW - 28;
+    const weekH = (monthH - 68 - weekGap * (weekRows - 1)) / weekRows;
+
+    for (let week = 0; week < weekRows; week += 1) {
+      const wy = weekY + week * (weekH + weekGap);
+      const weekId = api.createShapeId(`month-${month + 1}-week-${week + 1}`);
+
+      attachNode({
+        id: weekId,
+        level: 2,
+        parentId: monthId,
+        label: `Week ${week + 1}`,
+        bounds: { x: weekX, y: wy, w: weekW, h: weekH },
+      });
+
+      const dayGap = 8;
+      const dayCols = 7;
+      const dayX = weekX + 10;
+      const dayY = wy + 28;
+      const dayW = (weekW - 20 - dayGap * (dayCols - 1)) / dayCols;
+      const dayH = weekH - 36;
+
+      for (let day = 0; day < dayCols; day += 1) {
+        const dx = dayX + day * (dayW + dayGap);
+        const dayId = api.createShapeId(`month-${month + 1}-week-${week + 1}-day-${day + 1}`);
+        attachNode({
+          id: dayId,
+          level: 3,
+          parentId: weekId,
+          label: `Day ${day + 1}`,
+          bounds: { x: dx, y: dayY, w: dayW, h: dayH },
+        });
+      }
+    }
+  }
+
+  return { yearId, nodes, children };
+}
+
+function createShapesFromScene(api: TldrawApi, nodes: Map<string, ShapeNode>) {
+  const list: Array<Record<string, unknown>> = [];
+
+  for (const node of nodes.values()) {
+    list.push({
+      id: node.id,
+      type: "geo",
+      x: node.bounds.x,
+      y: node.bounds.y,
+      isLocked: true,
+      props: {
+        geo: "rectangle",
+        w: node.bounds.w,
+        h: node.bounds.h,
+        richText: api.toRichText(node.label),
+        color: "black",
+        fill: "none",
+        dash: "draw",
+      },
+      meta: {
+        level: node.level,
+        label: node.label,
+      },
+    });
+  }
+
+  return list;
+}
+
+function setupZoomFlow(editor: any, api: TldrawApi, host: HTMLDivElement) {
+  const { yearId, nodes, children } = buildScene(api);
+  const shapes = createShapesFromScene(api, nodes);
+  editor.createShapes(shapes);
+
+  let activeId = yearId;
+  let animating = false;
+  let token = 0;
+
+  const moveTo = (shapeId: string, immediate = false) => {
+    const bounds = editor.getShapePageBounds(shapeId);
+    if (!bounds) return;
+
+    token += 1;
+    const localToken = token;
+    const duration = immediate ? 0 : ZOOM_MS;
+
+    animating = true;
+    editor.stopCameraAnimation();
+    editor.zoomToBounds(bounds, {
+      inset: 20,
+      animation: { duration },
+      immediate,
+      force: true,
+    });
+
+    activeId = shapeId;
+    const node = nodes.get(shapeId);
+    if (node) {
+      activeLevel.value = node.level;
+      activeLabel.value = node.label;
+    }
+
+    window.setTimeout(() => {
+      if (localToken !== token) return;
+      animating = false;
+    }, duration + 40);
+  };
+
+  const firstChild = (shapeId: string) => {
+    const next = children.get(shapeId);
+    return next?.[0] ?? null;
+  };
+
+  const resolveChildFromHover = (shapeId: string) => {
+    const nextIds = children.get(shapeId) ?? [];
+    if (!nextIds.length) return null;
+
+    const pointer = editor.inputs.getCurrentPagePoint();
+    const hit = editor.getShapeAtPoint(pointer, {
+      margin: 0,
+      hitInside: true,
+      hitLocked: true,
+      hitLabels: true,
+      hitFrameInside: true,
+    });
+
+    if (!hit) return firstChild(shapeId);
+    let cursor: string | null = hit.id ?? null;
+    while (cursor && nodes.get(cursor)?.parentId !== shapeId) {
+      cursor = nodes.get(cursor)?.parentId ?? null;
+    }
+
+    if (cursor && nextIds.includes(cursor)) return cursor;
+    return firstChild(shapeId);
+  };
+
+  const zoomIn = () => {
+    const node = nodes.get(activeId);
+    if (!node || node.level >= 3) return;
+    const target = resolveChildFromHover(activeId);
+    if (!target) return;
+    moveTo(target, false);
+  };
+
+  const zoomOut = () => {
+    const parent = nodes.get(activeId)?.parentId;
+    if (!parent) return;
+    moveTo(parent, false);
+  };
+
+  const onWheel = (event: WheelEvent) => {
+    event.preventDefault();
+    if (animating) return;
+    if (event.deltaY < 0) {
+      zoomIn();
+      return;
+    }
+    zoomOut();
+  };
+
+  const onDoubleClick = () => {
+    if (animating) return;
+    moveTo(yearId, false);
+  };
+
+  host.addEventListener("wheel", onWheel, { passive: false });
+  host.addEventListener("dblclick", onDoubleClick);
+
+  moveTo(yearId, true);
+
+  return () => {
+    host.removeEventListener("wheel", onWheel);
+    host.removeEventListener("dblclick", onDoubleClick);
+  };
+}
+
+onMounted(async () => {
+  try {
+    if (!hostRef.value) return;
+
+    ensureTldrawCss();
+
+    const [react, reactDomClient, tldraw] = await Promise.all([
+      import(/* @vite-ignore */ "https://esm.sh/react@18.3.1"),
+      import(/* @vite-ignore */ "https://esm.sh/react-dom@18.3.1/client"),
+      import(/* @vite-ignore */ "https://esm.sh/tldraw@4.4.0?bundle"),
+    ]);
+
+    const createElement = (react as any).createElement as (...args: unknown[]) => unknown;
+    const createRoot = (reactDomClient as any).createRoot as (el: Element) => { render: (node: unknown) => void; unmount: () => void };
+    const api = tldraw as unknown as TldrawApi;
+
+    reactRoot = createRoot(hostRef.value);
+    reactRoot.render(
+      createElement(api.Tldraw, {
+        hideUi: true,
+        onMount: (editor: any) => {
+          status.value = "Wheel up = zoom in, wheel down = zoom out, double click = reset";
+          teardown = setupZoomFlow(editor, api, hostRef.value as HTMLDivElement);
+        },
+      }),
+    );
+  } catch (error) {
+    status.value = "Failed to load tldraw engine from CDN";
+    console.error(error);
+  }
+});
+
+onBeforeUnmount(() => {
+  teardown?.();
+  teardown = null;
+  reactRoot?.unmount();
+  reactRoot = null;
+});
 </script>
 
 <template>
   <section class="tldraw-lab-root">
-    <div class="tldraw-lab-toolbar">
-      <p class="tldraw-lab-title">tldraw demo (infinite canvas)</p>
-      <a
-        class="btn btn-xs btn-outline"
-        :href="tldrawUrl"
-        target="_blank"
-        rel="noopener noreferrer"
-      >
-        Open in new tab
-      </a>
-    </div>
-
-    <iframe
-      class="tldraw-lab-frame"
-      :src="tldrawUrl"
-      title="tldraw demo"
-      loading="lazy"
-      referrerpolicy="no-referrer"
-      allowfullscreen
-    />
+    <header class="tldraw-lab-toolbar">
+      <p class="tldraw-lab-title">{{ status }}</p>
+      <p class="tldraw-lab-subtitle">{{ debugInfo }}</p>
+    </header>
+    <div ref="hostRef" class="tldraw-lab-canvas" />
   </section>
 </template>
 
@@ -55,9 +345,13 @@ const tldrawUrl = "https://www.tldraw.com";
   color: color-mix(in oklab, var(--color-base-content) 72%, transparent);
 }
 
-.tldraw-lab-frame {
+.tldraw-lab-subtitle {
+  font-size: 0.74rem;
+  color: color-mix(in oklab, var(--color-base-content) 60%, transparent);
+}
+
+.tldraw-lab-canvas {
   width: 100%;
   height: calc(100% - 42px);
-  border: 0;
 }
 </style>
diff --git a/frontend/app/pages/calendar-zoom-lab.vue b/frontend/app/pages/calendar-zoom-lab.vue
index 3f4611d..5b82a7d 100644
--- a/frontend/app/pages/calendar-zoom-lab.vue
+++ b/frontend/app/pages/calendar-zoom-lab.vue
@@ -1,9 +1,9 @@
 <script setup lang="ts">
-import CrmCalendarZoomLab from "~~/app/components/workspace/calendar/lab/CrmCalendarZoomLab.vue";
+import CrmCalendarZoomTldrawLab from "~~/app/components/workspace/calendar/lab/CrmCalendarZoomTldrawLab.client.vue";
 </script>
 
 <template>
   <main class="h-dvh w-full bg-base-200/40 p-2">
-    <CrmCalendarZoomLab />
+    <CrmCalendarZoomTldrawLab />
   </main>
 </template>