From a3dcfe5cb26c18abacdb0e76a203d1cc67d288dd Mon Sep 17 00:00:00 2001
From: Macbook <macbook@Macbookui-MacBookPro.local>
Date: Sun, 14 Jun 2026 01:18:10 +0900
Subject: [PATCH] =?UTF-8?q?=EC=9C=84=EC=A0=AF=EC=98=81=EC=97=AD=20?=
 =?UTF-8?q?=EB=A6=AC=EC=82=AC=EC=9D=B4=EC=A6=88?=
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---
 .../floatingWidgets/FloatingWidgetLayer.tsx   |   7 +
 .../floatingWidgets/FloatingWidgetWindow.tsx  | 126 +++++++++++++++---
 .../src/hooks/useFloatingWidgetGridSplit.ts   | 112 ++++++++++++++++
 frontend/src/styles/floatingWidget.css        |  50 +++++++
 frontend/src/types/floatingWidget.ts          |  63 +++++++++
 5 files changed, 336 insertions(+), 22 deletions(-)
 create mode 100644 frontend/src/hooks/useFloatingWidgetGridSplit.ts

diff --git a/frontend/src/components/floatingWidgets/FloatingWidgetLayer.tsx b/frontend/src/components/floatingWidgets/FloatingWidgetLayer.tsx
index 48b8de8..2804ce8 100644
--- a/frontend/src/components/floatingWidgets/FloatingWidgetLayer.tsx
+++ b/frontend/src/components/floatingWidgets/FloatingWidgetLayer.tsx
@@ -120,6 +120,12 @@ const FloatingWidgetLayer: React.FC<Props> = ({
     )));
   }, []);
 
+  const handleUpdateGridFr = useCallback((id: string, rowFr: number[], colFr: number[]) => {
+    setInstances(prev => prev.map(inst => (
+      inst.id === id ? { ...inst, rowFr, colFr } : inst
+    )));
+  }, []);
+
   useEffect(() => {
     onInstancesChange?.(instances.length);
   }, [instances.length, onInstancesChange]);
@@ -154,6 +160,7 @@ const FloatingWidgetLayer: React.FC<Props> = ({
               onFocus={() => bringToFront(inst.id)}
               onUpdateSlots={slots => handleUpdateSlots(inst.id, slots)}
               onUpdateSize={(w, h) => handleUpdateSize(inst.id, w, h)}
+              onUpdateGridFr={(rowFr, colFr) => handleUpdateGridFr(inst.id, rowFr, colFr)}
             />
           ))}
 
diff --git a/frontend/src/components/floatingWidgets/FloatingWidgetWindow.tsx b/frontend/src/components/floatingWidgets/FloatingWidgetWindow.tsx
index 0577cec..ba55290 100644
--- a/frontend/src/components/floatingWidgets/FloatingWidgetWindow.tsx
+++ b/frontend/src/components/floatingWidgets/FloatingWidgetWindow.tsx
@@ -1,8 +1,15 @@
 import React, { useCallback, useEffect, useMemo, useRef, useState } from 'react';
 import { createPortal } from 'react-dom';
 import { useDraggablePanel } from '../../hooks/useDraggablePanel';
+import { useFloatingWidgetGridSplit } from '../../hooks/useFloatingWidgetGridSplit';
 import { useFloatingWidgetResize } from '../../hooks/useFloatingWidgetResize';
-import { minSizeForGrid, type FloatingWidgetInstance } from '../../types/floatingWidget';
+import {
+  defaultGridFr,
+  gridSplitPositions,
+  gridTemplateFr,
+  minSizeForGrid,
+  type FloatingWidgetInstance,
+} from '../../types/floatingWidget';
 import type { WidgetSlot } from '../../types/widgetDashboard';
 import WidgetSlotView from '../widgetDashboard/WidgetSlotView';
 import WidgetPickerModal from '../widgetDashboard/WidgetPickerModal';
@@ -14,6 +21,7 @@ interface Props {
   onFocus: () => void;
   onUpdateSlots: (slots: WidgetSlot[]) => void;
   onUpdateSize: (width: number, height: number) => void;
+  onUpdateGridFr: (rowFr: number[], colFr: number[]) => void;
 }
 
 const FloatingWidgetWindow: React.FC<Props> = ({
@@ -23,9 +31,23 @@ const FloatingWidgetWindow: React.FC<Props> = ({
   onFocus,
   onUpdateSlots,
   onUpdateSize,
+  onUpdateGridFr,
 }) => {
   const [pickSlotId, setPickSlotId] = useState<string | null>(null);
   const bodyRef = useRef<HTMLDivElement>(null);
+  const [bodySize, setBodySize] = useState({ width: 0, height: 0 });
+
+  const rowFr = instance.rowFr?.length === instance.rows
+    ? instance.rowFr
+    : defaultGridFr(instance.rows);
+  const colFr = instance.colFr?.length === instance.cols
+    ? instance.colFr
+    : defaultGridFr(instance.cols);
+
+  const rowFrRef = useRef(rowFr);
+  const colFrRef = useRef(colFr);
+  rowFrRef.current = rowFr;
+  colFrRef.current = colFr;
 
   const {
     panelRef,
@@ -59,6 +81,25 @@ const FloatingWidgetWindow: React.FC<Props> = ({
     handleResize,
   );
 
+  const handleColFrChange = useCallback((next: number[]) => {
+    onUpdateGridFr(rowFrRef.current, next);
+  }, [onUpdateGridFr]);
+
+  const handleRowFrChange = useCallback((next: number[]) => {
+    onUpdateGridFr(next, colFrRef.current);
+  }, [onUpdateGridFr]);
+
+  const { onColSplitPointerDown, onRowSplitPointerDown } = useFloatingWidgetGridSplit({
+    onColFrChange: handleColFrChange,
+    onRowFrChange: handleRowFrChange,
+    getColFr: () => colFrRef.current,
+    getRowFr: () => rowFrRef.current,
+    getBodySize: () => ({
+      width: bodyRef.current?.clientWidth ?? bodySize.width,
+      height: bodyRef.current?.clientHeight ?? bodySize.height,
+    }),
+  });
+
   const updateSlot = useCallback((slotId: string, updater: (s: WidgetSlot) => WidgetSlot) => {
     onUpdateSlots(instance.slots.map(s => (s.id === slotId ? updater(s) : s)));
   }, [instance.slots, onUpdateSlots]);
@@ -73,23 +114,35 @@ const FloatingWidgetWindow: React.FC<Props> = ({
     updateSlot(slotId, s => ({ ...s, widgetType: null, config: {} }));
   }, [updateSlot]);
 
-  /* 창 크기 변경 시 내부 차트·위젯 레이아웃 재동기화 */
+  /* 창·그리드 크기 변경 시 내부 차트·위젯 레이아웃 재동기화 */
   useEffect(() => {
     const el = bodyRef.current;
     if (!el) return undefined;
     let timer: ReturnType<typeof setTimeout> | null = null;
-    const ro = new ResizeObserver(() => {
+    const scheduleLayoutSync = () => {
+      setBodySize({ width: el.clientWidth, height: el.clientHeight });
       if (timer) clearTimeout(timer);
       timer = setTimeout(() => {
         window.dispatchEvent(new CustomEvent('gc-widget-layout-sync'));
       }, 80);
-    });
+    };
+    scheduleLayoutSync();
+    const ro = new ResizeObserver(() => scheduleLayoutSync());
     ro.observe(el);
     return () => {
       if (timer) clearTimeout(timer);
       ro.disconnect();
     };
-  }, []);
+  }, [instance.rows, instance.cols]);
+
+  const colSplitPositions = useMemo(
+    () => gridSplitPositions(colFr, bodySize.width, 1),
+    [colFr, bodySize.width],
+  );
+  const rowSplitPositions = useMemo(
+    () => gridSplitPositions(rowFr, bodySize.height, 1),
+    [rowFr, bodySize.height],
+  );
 
   const title = `위젯 ${instance.rows}×${instance.cols}`;
 
@@ -125,24 +178,53 @@ const FloatingWidgetWindow: React.FC<Props> = ({
           </button>
         </div>
 
-        <div
-          ref={bodyRef}
-          className="fw-window-body"
-          style={{
-            gridTemplateRows: `repeat(${instance.rows}, minmax(0, 1fr))`,
-            gridTemplateColumns: `repeat(${instance.cols}, minmax(0, 1fr))`,
-          }}
-        >
-          {instance.slots.map(slot => (
-            <div key={slot.id} className="fw-window-cell">
-              <WidgetSlotView
-                slot={slot}
-                zoneId="center"
-                onPickWidget={id => setPickSlotId(id)}
-                onClearWidget={id => clearWidget(id)}
-              />
+        <div className="fw-window-body-wrap">
+          <div
+            ref={bodyRef}
+            className="fw-window-body"
+            style={{
+              gridTemplateRows: gridTemplateFr(rowFr),
+              gridTemplateColumns: gridTemplateFr(colFr),
+            }}
+          >
+            {instance.slots.map(slot => (
+              <div key={slot.id} className="fw-window-cell">
+                <WidgetSlotView
+                  slot={slot}
+                  zoneId="center"
+                  onPickWidget={id => setPickSlotId(id)}
+                  onClearWidget={id => clearWidget(id)}
+                />
+              </div>
+            ))}
+          </div>
+
+          {(colSplitPositions.length > 0 || rowSplitPositions.length > 0) && (
+            <div className="fw-grid-split-layer" aria-hidden="true">
+              {colSplitPositions.map((left, index) => (
+                <div
+                  key={`col-${index}`}
+                  className="fw-grid-splitter fw-grid-splitter--v"
+                  style={{ left }}
+                  role="separator"
+                  aria-orientation="vertical"
+                  aria-label={`열 ${index + 1}·${index + 2} 경계 조절`}
+                  onPointerDown={onColSplitPointerDown(index)}
+                />
+              ))}
+              {rowSplitPositions.map((top, index) => (
+                <div
+                  key={`row-${index}`}
+                  className="fw-grid-splitter fw-grid-splitter--h"
+                  style={{ top }}
+                  role="separator"
+                  aria-orientation="horizontal"
+                  aria-label={`행 ${index + 1}·${index + 2} 경계 조절`}
+                  onPointerDown={onRowSplitPointerDown(index)}
+                />
+              ))}
             </div>
-          ))}
+          )}
         </div>
 
         <div className="fw-window-resize-layer">
diff --git a/frontend/src/hooks/useFloatingWidgetGridSplit.ts b/frontend/src/hooks/useFloatingWidgetGridSplit.ts
new file mode 100644
index 0000000..730dd26
--- /dev/null
+++ b/frontend/src/hooks/useFloatingWidgetGridSplit.ts
@@ -0,0 +1,112 @@
+import { useCallback, useEffect, useRef } from 'react';
+import {
+  adjustAdjacentGridFr,
+  FLOATING_WIDGET_CELL_MIN_H,
+  FLOATING_WIDGET_CELL_MIN_W,
+  FLOATING_WIDGET_GRID_GAP,
+} from '../types/floatingWidget';
+import { bindWindowDrag, isPrimaryPointerButton } from '../utils/pointerDrag';
+
+type SplitAxis = 'col' | 'row';
+
+interface Options {
+  onColFrChange: (next: number[]) => void;
+  onRowFrChange: (next: number[]) => void;
+  getColFr: () => number[];
+  getRowFr: () => number[];
+  getBodySize: () => { width: number; height: number };
+}
+
+export function useFloatingWidgetGridSplit({
+  onColFrChange,
+  onRowFrChange,
+  getColFr,
+  getRowFr,
+  getBodySize,
+}: Options) {
+  const unbindDragRef = useRef<(() => void) | null>(null);
+
+  const endDrag = useCallback(() => {
+    unbindDragRef.current?.();
+    unbindDragRef.current = null;
+    document.body.style.cursor = '';
+    document.body.style.userSelect = '';
+  }, []);
+
+  useEffect(() => () => {
+    unbindDragRef.current?.();
+    document.body.style.cursor = '';
+    document.body.style.userSelect = '';
+  }, []);
+
+  const startSplit = useCallback((
+    e: React.PointerEvent,
+    axis: SplitAxis,
+    index: number,
+  ) => {
+    if (!isPrimaryPointerButton(e)) return;
+    e.preventDefault();
+    e.stopPropagation();
+
+    const handle = e.currentTarget as HTMLElement;
+    try {
+      handle.setPointerCapture(e.pointerId);
+    } catch {
+      /* ignore */
+    }
+    handle.classList.add('fw-grid-splitter--active');
+
+    const startX = e.clientX;
+    const startY = e.clientY;
+    const startColFr = [...getColFr()];
+    const startRowFr = [...getRowFr()];
+    const startSize = getBodySize();
+
+    document.body.style.cursor = axis === 'col' ? 'col-resize' : 'row-resize';
+    document.body.style.userSelect = 'none';
+
+    unbindDragRef.current?.();
+    unbindDragRef.current = bindWindowDrag(
+      (xy) => {
+        if (axis === 'col') {
+          const delta = xy.x - startX;
+          onColFrChange(adjustAdjacentGridFr(
+            startColFr,
+            index,
+            delta,
+            startSize.width,
+            FLOATING_WIDGET_GRID_GAP,
+            FLOATING_WIDGET_CELL_MIN_W,
+          ));
+          return;
+        }
+        const delta = xy.y - startY;
+        onRowFrChange(adjustAdjacentGridFr(
+          startRowFr,
+          index,
+          delta,
+          startSize.height,
+          FLOATING_WIDGET_GRID_GAP,
+          FLOATING_WIDGET_CELL_MIN_H,
+        ));
+      },
+      () => {
+        handle.classList.remove('fw-grid-splitter--active');
+        endDrag();
+      },
+      { preventTouchScroll: true },
+    );
+  }, [endDrag, getBodySize, getColFr, getRowFr, onColFrChange, onRowFrChange]);
+
+  const onColSplitPointerDown = useCallback(
+    (index: number) => (e: React.PointerEvent) => startSplit(e, 'col', index),
+    [startSplit],
+  );
+
+  const onRowSplitPointerDown = useCallback(
+    (index: number) => (e: React.PointerEvent) => startSplit(e, 'row', index),
+    [startSplit],
+  );
+
+  return { onColSplitPointerDown, onRowSplitPointerDown };
+}
diff --git a/frontend/src/styles/floatingWidget.css b/frontend/src/styles/floatingWidget.css
index 2c3674a..94d37b6 100644
--- a/frontend/src/styles/floatingWidget.css
+++ b/frontend/src/styles/floatingWidget.css
@@ -104,6 +104,14 @@
   background: color-mix(in srgb, #e74c3c 12%, transparent);
 }
 
+.fw-window-body-wrap {
+  position: relative;
+  flex: 1;
+  min-height: 0;
+  min-width: 0;
+  overflow: hidden;
+}
+
 .fw-window-body {
   flex: 1;
   min-height: 0;
@@ -156,6 +164,48 @@
   height: 100%;
 }
 
+/* 그리드 칸 경계 리사이즈 */
+.fw-grid-split-layer {
+  position: absolute;
+  inset: 0;
+  z-index: 20;
+  pointer-events: none;
+}
+
+.fw-grid-splitter {
+  position: absolute;
+  pointer-events: auto;
+  touch-action: none;
+  background: transparent;
+  transition: background 0.12s;
+}
+
+.fw-grid-splitter--v {
+  top: 0;
+  bottom: 0;
+  width: 7px;
+  margin-left: -3px;
+  cursor: col-resize;
+}
+
+.fw-grid-splitter--h {
+  left: 0;
+  right: 0;
+  height: 7px;
+  margin-top: -3px;
+  cursor: row-resize;
+}
+
+.fw-grid-splitter:hover,
+.fw-grid-splitter--active,
+.fw-window--focused .fw-grid-splitter {
+  background: color-mix(in srgb, var(--se-accent, var(--accent)) 35%, transparent);
+}
+
+.fw-grid-splitter--active {
+  background: color-mix(in srgb, var(--se-accent, var(--accent)) 55%, transparent);
+}
+
 /* 리사이즈 핸들 — 좌·우 하단 (차트 툴바 위에 표시) */
 .fw-window-resize-layer {
   position: absolute;
diff --git a/frontend/src/types/floatingWidget.ts b/frontend/src/types/floatingWidget.ts
index 9e267b6..fe13f99 100644
--- a/frontend/src/types/floatingWidget.ts
+++ b/frontend/src/types/floatingWidget.ts
@@ -21,17 +21,78 @@ export const FLOATING_WIDGET_LAYOUTS: FloatingWidgetLayoutPreset[] = [
   { id: '3x3', rows: 3, cols: 3, label: '3×3' },
 ];
 
+export const FLOATING_WIDGET_CELL_MIN_W = 140;
+export const FLOATING_WIDGET_CELL_MIN_H = 100;
+export const FLOATING_WIDGET_GRID_GAP = 1;
+
 export interface FloatingWidgetInstance {
   id: string;
   rows: number;
   cols: number;
   slots: WidgetSlot[];
+  /** 행·열 비율 (fr) — 그리드 칸 리사이즈 */
+  rowFr: number[];
+  colFr: number[];
   position: { x: number; y: number };
   width: number;
   height: number;
   zIndex: number;
 }
 
+export function defaultGridFr(count: number): number[] {
+  return Array.from({ length: count }, () => 1);
+}
+
+export function gridTemplateFr(fr: number[]): string {
+  return fr.map(f => `${Math.max(f, 0.05)}fr`).join(' ');
+}
+
+/** 인접 두 트랙의 fr 비율을 픽셀 delta 만큼 조정 */
+export function adjustAdjacentGridFr(
+  fr: number[],
+  index: number,
+  deltaPx: number,
+  containerPx: number,
+  gapPx: number,
+  minCellPx: number,
+): number[] {
+  if (index < 0 || index >= fr.length - 1) return fr;
+  const next = [...fr];
+  const n = fr.length;
+  const totalFr = fr.reduce((a, b) => a + b, 0);
+  const contentPx = Math.max(0, containerPx - (n - 1) * gapPx);
+  const pairFr = fr[index] + fr[index + 1];
+  const leftPx = contentPx * fr[index] / totalFr;
+  const rightPx = contentPx * fr[index + 1] / totalFr;
+  const pairPx = leftPx + rightPx;
+  const minLeft = Math.min(minCellPx, pairPx / 2);
+  const maxLeft = Math.max(pairPx - minCellPx, pairPx / 2);
+  const newLeftPx = Math.max(minLeft, Math.min(maxLeft, leftPx + deltaPx));
+  const newRightPx = pairPx - newLeftPx;
+  next[index] = pairFr * (newLeftPx / pairPx);
+  next[index + 1] = pairFr * (newRightPx / pairPx);
+  return next;
+}
+
+/** 스플리터 위치(px) — gap 포함 */
+export function gridSplitPositions(
+  fr: number[],
+  containerPx: number,
+  gapPx: number,
+): number[] {
+  const n = fr.length;
+  if (n <= 1 || containerPx <= 0) return [];
+  const totalFr = fr.reduce((a, b) => a + b, 0);
+  const contentPx = Math.max(0, containerPx - (n - 1) * gapPx);
+  const positions: number[] = [];
+  let accPx = 0;
+  for (let i = 0; i < n - 1; i++) {
+    accPx += contentPx * fr[i] / totalFr;
+    positions.push(accPx + i * gapPx + gapPx / 2);
+  }
+  return positions;
+}
+
 export function defaultSizeForGrid(rows: number, cols: number): { width: number; height: number } {
   const cellW = 280;
   const cellH = 220;
@@ -69,6 +130,8 @@ export function createFloatingWidgetInstance(
     rows,
     cols,
     slots: Array.from({ length: count }, () => newWidgetSlot()),
+    rowFr: defaultGridFr(rows),
+    colFr: defaultGridFr(cols),
     position: {
       x: Math.min(80 + offset, Math.max(24, window.innerWidth - width - 24)),
       y: Math.min(72 + offset, Math.max(24, window.innerHeight - height - 24)),