바코드 업데이트 및 AI LLm 적용용

frontend/components/barcode/designer/BarcodeDesignerCanvas.tsx

@@ -1,14 +1,20 @@
 "use client";
 
-import { useRef } from "react";
+import { useRef, useState, useEffect } from "react";
 import { useDrop } from "react-dnd";
 import { useBarcodeDesigner, MM_TO_PX } from "@/contexts/BarcodeDesignerContext";
 import { BarcodeLabelCanvasComponent } from "./BarcodeLabelCanvasComponent";
 import { BarcodeLabelComponent } from "@/types/barcode";
 import { v4 as uuidv4 } from "uuid";
 
+/** 작업 영역에 라벨이 들어가도록 스케일 (최소 0.5=작게 맞춤, 최대 3) */
+const MIN_SCALE = 0.5;
+const MAX_SCALE = 3;
+
 export function BarcodeDesignerCanvas() {
+  const containerRef = useRef<HTMLDivElement>(null);
   const canvasRef = useRef<HTMLDivElement>(null);
+  const [scale, setScale] = useState(1);
   const {
     widthMm,
     heightMm,
@@ -22,17 +28,45 @@ export function BarcodeDesignerCanvas() {
   const widthPx = widthMm * MM_TO_PX;
   const heightPx = heightMm * MM_TO_PX;
 
+  // 컨테이너 크기에 맞춰 캔버스 스케일 계산 (라벨이 너무 작게 보이지 않도록)
+  useEffect(() => {
+    const el = containerRef.current;
+    if (!el || widthPx <= 0 || heightPx <= 0) return;
+    const observer = new ResizeObserver(() => {
+      const w = el.clientWidth - 48;
+      const h = el.clientHeight - 48;
+      if (w <= 0 || h <= 0) return;
+      const scaleX = w / widthPx;
+      const scaleY = h / heightPx;
+      const fitScale = Math.min(scaleX, scaleY);
+      const s = Math.max(MIN_SCALE, Math.min(MAX_SCALE, fitScale));
+      setScale(s);
+    });
+    observer.observe(el);
+    const w = el.clientWidth - 48;
+    const h = el.clientHeight - 48;
+    if (w > 0 && h > 0) {
+      const scaleX = w / widthPx;
+      const scaleY = h / heightPx;
+      const fitScale = Math.min(scaleX, scaleY);
+      const s = Math.max(MIN_SCALE, Math.min(MAX_SCALE, fitScale));
+      setScale(s);
+    }
+    return () => observer.disconnect();
+  }, [widthPx, heightPx]);
+
   const [{ isOver }, drop] = useDrop(() => ({
     accept: "barcode-component",
     drop: (item: { component: BarcodeLabelComponent }, monitor) => {
-      if (!canvasRef.current) return;
+      const canvasEl = canvasRef.current;
+      if (!canvasEl) return;
       const offset = monitor.getClientOffset();
-      const rect = canvasRef.current.getBoundingClientRect();
+      const rect = canvasEl.getBoundingClientRect();
       if (!offset) return;
-
-      let x = offset.x - rect.left;
-      let y = offset.y - rect.top;
-      // 드롭 시 요소 중앙이 커서에 오도록 보정
+      // 스케일 적용된 좌표 → 실제 캔버스 좌표
+      const s = scale;
+      let x = (offset.x - rect.left) / s;
+      let y = (offset.y - rect.top) / s;
       x -= item.component.width / 2;
       y -= item.component.height / 2;
       x = Math.max(0, Math.min(x, widthPx - item.component.width));
@@ -48,36 +82,56 @@ export function BarcodeDesignerCanvas() {
       addComponent(newComp);
     },
     collect: (m) => ({ isOver: m.isOver() }),
-  }), [widthPx, heightPx, components.length, addComponent, snapValueToGrid]);
+  }), [widthPx, heightPx, scale, components.length, addComponent, snapValueToGrid]);
+
+  // 스케일된 캔버스가 컨테이너 안에 들어가도록 fit (하단 잘림 방지)
+  const scaledW = widthPx * scale;
+  const scaledH = heightPx * scale;
 
   return (
-    <div className="flex flex-1 items-center justify-center overflow-auto bg-gray-100 p-6">
+    <div
+      ref={containerRef}
+      className="flex min-h-0 flex-1 items-center justify-center overflow-auto bg-gray-100 p-6"
+    >
+      {/* 래퍼: 스케일된 크기만큼 차지해서 flex로 정확히 가운데 + 하단 잘림 방지 */}
       <div
-        key={`canvas-${widthMm}-${heightMm}`}
-        ref={(r) => {
-          (canvasRef as any).current = r;
-          drop(r);
-        }}
-        className="relative bg-white shadow-lg"
-        style={{
-          width: widthPx,
-          height: heightPx,
-          minWidth: widthPx,
-          minHeight: heightPx,
-          backgroundImage: showGrid
-            ? `linear-gradient(to right, #e5e7eb 1px, transparent 1px),
-               linear-gradient(to bottom, #e5e7eb 1px, transparent 1px)`
-            : undefined,
-          backgroundSize: showGrid ? `${MM_TO_PX * 5}px ${MM_TO_PX * 5}px` : undefined,
-          outline: isOver ? "2px dashed #2563eb" : "1px solid #d1d5db",
-        }}
-        onClick={(e) => {
-          if (e.target === e.currentTarget) selectComponent(null);
-        }}
+        className="flex shrink-0 items-center justify-center"
+        style={{ width: scaledW, height: scaledH }}
       >
-        {components.map((c) => (
-          <BarcodeLabelCanvasComponent key={c.id} component={c} />
-        ))}
+        <div
+          style={{
+            transform: `scale(${scale})`,
+            transformOrigin: "0 0",
+          }}
+        >
+          <div
+            key={`canvas-${widthMm}-${heightMm}`}
+            ref={(r) => {
+              (canvasRef as { current: HTMLDivElement | null }).current = r;
+              drop(r);
+            }}
+            className="relative bg-white shadow-lg"
+            style={{
+              width: widthPx,
+              height: heightPx,
+              minWidth: widthPx,
+              minHeight: heightPx,
+              backgroundImage: showGrid
+                ? `linear-gradient(to right, #e5e7eb 1px, transparent 1px),
+                   linear-gradient(to bottom, #e5e7eb 1px, transparent 1px)`
+                : undefined,
+              backgroundSize: showGrid ? `${MM_TO_PX * 5}px ${MM_TO_PX * 5}px` : undefined,
+              outline: isOver ? "2px dashed #2563eb" : "1px solid #d1d5db",
+            }}
+            onClick={(e) => {
+              if (e.target === e.currentTarget) selectComponent(null);
+            }}
+          >
+            {components.map((c) => (
+              <BarcodeLabelCanvasComponent key={c.id} component={c} />
+            ))}
+          </div>
+        </div>
       </div>
     </div>
   );