优化

src/components/ElementFloatPreview.tsx

@@ -1,4 +1,4 @@
-import React, { useState, useEffect, useMemo } from 'react';
+import React, { useState, useEffect } from 'react';
 import { TemplateElement } from '../types';
 import { mmToPx } from '../utils';
 import { renderLabelToDataUrl } from '../labelRenderer';
@@ -8,6 +8,28 @@ interface ElementFloatPreviewProps {
   renderScale: number;
   displayZoom: number;
   variableDefaults?: Record<string, string> | null;
+  /** 已离屏绘制的位图，传入后不再重复渲染 */
+  dataUrl?: string;
+}
+
+export async function renderElementFloatPreview(
+  element: TemplateElement,
+  renderScale: number,
+  variableDefaults?: Record<string, string> | null
+): Promise<string> {
+  return renderLabelToDataUrl({
+    widthMm: element.width,
+    heightMm: element.height,
+    elements: [{ ...element, x: 0, y: 0 }],
+    rowData: null,
+    rowIndex: 0,
+    showBorder: false,
+    transparentBackground: true,
+    variableDefaults,
+    mode: 'design',
+    scale: renderScale,
+    clipToCanvas: false,
+  });
 }
 
 /** 单元素离屏绘制（不裁切到标签页边界），用于拖动/缩放浮层 */
@@ -16,27 +38,18 @@ export const ElementFloatPreview: React.FC<ElementFloatPreviewProps> = ({
   renderScale,
   displayZoom,
   variableDefaults = null,
+  dataUrl: dataUrlProp,
 }) => {
-  const [dataUrl, setDataUrl] = useState('');
+  const [dataUrl, setDataUrl] = useState(dataUrlProp ?? '');
-
-  const elementKey = useMemo(() => JSON.stringify(element), [element]);
 
   useEffect(() => {
-    let active = true;
+    if (dataUrlProp) {
-    const normalized = { ...element, x: 0, y: 0 };
+      setDataUrl(dataUrlProp);
+      return;
+    }
 
-    renderLabelToDataUrl({
+    let active = true;
-      widthMm: element.width,
+    renderElementFloatPreview(element, renderScale, variableDefaults)
-      heightMm: element.height,
-      elements: [normalized],
-      rowData: null,
-      rowIndex: 0,
-      showBorder: false,
-      transparentBackground: true,
-      variableDefaults,
-      mode: 'design',
-      scale: renderScale,
-    })
       .then((url) => {
         if (active) setDataUrl(url);
       })
@@ -47,7 +60,7 @@ export const ElementFloatPreview: React.FC<ElementFloatPreviewProps> = ({
     return () => {
       active = false;
     };
-  }, [element, elementKey, renderScale, variableDefaults]);
+  }, [element, renderScale, variableDefaults, dataUrlProp]);
 
   const left = mmToPx(element.x, displayZoom);
   const top = mmToPx(element.y, displayZoom);

src/components/LabelDesigner.tsx

@@ -1,9 +1,11 @@
 import React, { useState, useRef, useEffect, useCallback, useMemo } from 'react';
+import { createPortal } from 'react-dom';
 import { LabelTemplate, TemplateElement } from '../types';
 import { mmToPx, MM_TO_PX, shouldRenderElement } from '../utils';
 import { useIsNarrowScreen } from '../hooks/useIsMobile';
 import { CanvasLabelImage } from './CanvasLabelImage';
-import { ElementFloatPreview } from './ElementFloatPreview';
+import { ElementFloatPreview, renderElementFloatPreview } from './ElementFloatPreview';
+import { renderLabelToDataUrl } from '../labelRenderer';
 import { useAppDialog } from './AppDialog';
 import {
   ZoomIn,
@@ -76,6 +78,9 @@ function applyCornerResize(
 
 const MARQUEE_MIN_PX = 4;
 const DRAG_START_THRESHOLD_PX = 4;
+/** 松手前极短时间内的微小位移视为抖动，提交上一稳定位置 */
+const DRAG_RELEASE_JITTER_PX = 4;
+const DRAG_RELEASE_JITTER_MS = 48;
 const MODERATE_ZOOM_MAX = 2.0;
 
 function blurActiveField() {
@@ -219,7 +224,21 @@ export const LabelDesigner: React.FC<LabelDesignerProps> = ({
   >(null);
   const dragRafRef = useRef<number | null>(null);
   const pendingDragElementsRef = useRef<TemplateElement[] | null>(null);
+  const pendingDragDeltaRef = useRef({ x: 0, y: 0 });
+  type DragCommitSnapshot = {
+    elements: TemplateElement[];
+    delta: { x: number; y: number };
+    time: number;
+  };
+  const dragCommitHistoryRef = useRef<DragCommitSnapshot | null>(null);
+  const dragCommitHistoryPrevRef = useRef<DragCommitSnapshot | null>(null);
   const dragFloatLayerRef = useRef<HTMLDivElement | null>(null);
+  const canvasWrapperRef = useRef<HTMLDivElement | null>(null);
+  const interactionPortalRef = useRef<HTMLDivElement | null>(null);
+  const dragFloatImgRefs = useRef<Map<string, HTMLImageElement>>(new Map());
+  const dragFloatUrlsRef = useRef<Record<string, string>>({});
+  const dragTransformLoopRef = useRef<number | null>(null);
+  const [dragFloatElements, setDragFloatElements] = useState<TemplateElement[]>([]);
   const interactionFloatPaintRef = useRef(0);
   const interactionFloatTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
 
@@ -487,8 +506,18 @@ export const LabelDesigner: React.FC<LabelDesignerProps> = ({
     if (dragFloatLayerRef.current) {
       dragFloatLayerRef.current.style.transform = '';
     }
+    if (dragTransformLoopRef.current !== null) {
+      cancelAnimationFrame(dragTransformLoopRef.current);
+      dragTransformLoopRef.current = null;
+    }
     setInteractionSnapshot(null);
     setInteractionFloatElements(null);
+    setDragFloatElements([]);
+    dragFloatImgRefs.current.clear();
+    dragFloatUrlsRef.current = {};
+    pendingDragDeltaRef.current = { x: 0, y: 0 };
+    dragCommitHistoryRef.current = null;
+    dragCommitHistoryPrevRef.current = null;
   }, []);
 
   const cancelActiveInteraction = useCallback(() => {
@@ -712,11 +741,45 @@ export const LabelDesigner: React.FC<LabelDesignerProps> = ({
     if (!dragState) return;
     dragMovedRef.current = false;
 
+    const syncInteractionPortalLayout = () => {
+      const wrapper = canvasWrapperRef.current;
+      const portal = interactionPortalRef.current;
+      if (wrapper && portal) {
+        const rect = wrapper.getBoundingClientRect();
+        portal.style.left = `${rect.left}px`;
+        portal.style.top = `${rect.top}px`;
+        portal.style.width = `${rect.width}px`;
+        portal.style.height = `${rect.height}px`;
+      }
+    };
+
+    const runDragTransformLoop = () => {
+      const tick = () => {
+        syncInteractionPortalLayout();
+        const layer = dragFloatLayerRef.current;
+        if (layer) {
+          const { x, y } = pendingDragDeltaRef.current;
+          layer.style.transform = `translate3d(${x}px, ${y}px, 0)`;
+        }
+        dragTransformLoopRef.current = requestAnimationFrame(tick);
+      };
+      dragTransformLoopRef.current = requestAnimationFrame(tick);
+    };
+
+    if (dragState.type === 'drag') {
+      runDragTransformLoop();
+    }
+
     const handlePointerMove = (e: PointerEvent) => {
       if (multiTouchActiveRef.current) return;
 
       const deltaX = e.clientX - dragState.startX;
       const deltaY = e.clientY - dragState.startY;
+
+      if (dragState.type === 'drag') {
+        pendingDragDeltaRef.current = { x: deltaX, y: deltaY };
+      }
+
       const pastDragThreshold =
         Math.abs(deltaX) > DRAG_START_THRESHOLD_PX || Math.abs(deltaY) > DRAG_START_THRESHOLD_PX;
 
@@ -744,18 +807,12 @@ export const LabelDesigner: React.FC<LabelDesignerProps> = ({
           };
         });
         pendingDragElementsRef.current = updated;
-        if (dragFloatLayerRef.current) {
+        dragCommitHistoryPrevRef.current = dragCommitHistoryRef.current;
-          dragFloatLayerRef.current.style.transform = `translate(${deltaX}px, ${deltaY}px)`;
+        dragCommitHistoryRef.current = {
-        }
+          elements: updated,
-        if (dragRafRef.current === null) {
+          delta: { x: deltaX, y: deltaY },
-          dragRafRef.current = requestAnimationFrame(() => {
+          time: performance.now(),
-            dragRafRef.current = null;
+        };
-            const next = pendingDragElementsRef.current;
-            if (next) {
-              localElementsRef.current = next;
-            }
-          });
-        }
       } else if (dragState.type === 'resize') {
         const elem = template.elements.find((el) => el.id === dragState.elementId);
         if (!elem || elem.locked) return;
@@ -821,6 +878,23 @@ export const LabelDesigner: React.FC<LabelDesignerProps> = ({
       }
     };
 
+    const resolveDragCommitElements = (): TemplateElement[] | null => {
+      if (dragState.type !== 'drag') {
+        return pendingDragElementsRef.current ?? localElementsRef.current;
+      }
+      const cur = dragCommitHistoryRef.current;
+      const prev = dragCommitHistoryPrevRef.current;
+      if (cur && prev) {
+        const micro = Math.hypot(cur.delta.x - prev.delta.x, cur.delta.y - prev.delta.y);
+        const dt = cur.time - prev.time;
+        if (micro > 0 && micro <= DRAG_RELEASE_JITTER_PX && dt <= DRAG_RELEASE_JITTER_MS) {
+          return prev.elements;
+        }
+        return cur.elements;
+      }
+      return cur?.elements ?? pendingDragElementsRef.current ?? localElementsRef.current;
+    };
+
     const handlePointerUp = () => {
       if (multiTouchActiveRef.current) {
         cancelActiveInteraction();
@@ -830,10 +904,11 @@ export const LabelDesigner: React.FC<LabelDesignerProps> = ({
         cancelAnimationFrame(dragRafRef.current);
         dragRafRef.current = null;
       }
-      if (pendingDragElementsRef.current) {
+      const commitElements = resolveDragCommitElements();
-        localElementsRef.current = pendingDragElementsRef.current;
+      if (commitElements) {
-        pendingDragElementsRef.current = null;
+        localElementsRef.current = commitElements;
       }
+      pendingDragElementsRef.current = null;
       if (localElementsRef.current) {
         const shouldCommit =
           dragState.type === 'resize' || dragMovedRef.current;
@@ -850,6 +925,10 @@ export const LabelDesigner: React.FC<LabelDesignerProps> = ({
     window.addEventListener('pointerup', handlePointerUp);
     window.addEventListener('pointercancel', handlePointerUp);
     return () => {
+      if (dragTransformLoopRef.current !== null) {
+        cancelAnimationFrame(dragTransformLoopRef.current);
+        dragTransformLoopRef.current = null;
+      }
       window.removeEventListener('pointermove', handlePointerMove);
       window.removeEventListener('pointerup', handlePointerUp);
       window.removeEventListener('pointercancel', handlePointerUp);
@@ -954,9 +1033,22 @@ export const LabelDesigner: React.FC<LabelDesignerProps> = ({
     if (element.locked) return;
 
     e.currentTarget.setPointerCapture(e.pointerId);
+    const groupStartPositions = buildGroupStartPositions(element);
+    const moveIds = new Set(Object.keys(groupStartPositions));
+    const floating = template.elements.filter(
+      (el) =>
+        moveIds.has(el.id) &&
+        shouldRenderElement(el, null, 0, previewDefaults, 'design')
+    );
+
     setInteractionSnapshot(template.elements);
     setInteractionFloatElements(null);
     interactionFloatPaintRef.current = 0;
+    dragFloatUrlsRef.current = {};
+    dragFloatImgRefs.current.clear();
+    dragCommitHistoryRef.current = null;
+    dragCommitHistoryPrevRef.current = null;
+    setDragFloatElements(floating);
     setDragState({
       elementId: element.id,
       type: actionType,
@@ -966,8 +1058,34 @@ export const LabelDesigner: React.FC<LabelDesignerProps> = ({
       startElemY: element.y,
       startElemW: element.width,
       startElemH: element.height,
-      groupStartPositions: buildGroupStartPositions(element),
+      groupStartPositions,
     });
+
+    if (actionType === 'drag' && floating.length > 0) {
+      void Promise.all(
+        floating.map(async (el) => {
+          try {
+            const url = await renderElementFloatPreview(
+              el,
+              canvasRenderScale,
+              previewDefaults
+            );
+            dragFloatUrlsRef.current[el.id] = url;
+            const img = dragFloatImgRefs.current.get(el.id);
+            if (img) {
+              img.src = url;
+              if (img.complete) {
+                img.style.opacity = '1';
+                const placeholder = img.previousElementSibling as HTMLElement | null;
+                if (placeholder) placeholder.style.display = 'none';
+              }
+            }
+          } catch (err) {
+            console.error('Drag float preview error:', err);
+          }
+        })
+      );
+    }
   };
 
   const handleResizeStart = (
@@ -1052,23 +1170,40 @@ export const LabelDesigner: React.FC<LabelDesignerProps> = ({
     filterVisibleElements,
   ]);
 
-  const dragFloatElements = useMemo(() => {
-    if (dragState?.type !== 'drag' || !interactionSnapshot || !dragMovingIdSet) {
-      return null;
-    }
-    const moving = interactionSnapshot.filter((el) => dragMovingIdSet.has(el.id));
-    return moving.length > 0 ? filterVisibleElements(moving) : null;
-  }, [dragState?.type, interactionSnapshot, dragMovingIdSet, filterVisibleElements]);
-
   const resizeFloatElements = useMemo(() => {
     if (dragState?.type !== 'resize' || !interactionFloatElements?.length) return null;
     return filterVisibleElements(interactionFloatElements);
   }, [dragState?.type, interactionFloatElements, filterVisibleElements]);
 
-  const interactionFloatCanvasElements = dragFloatElements ?? resizeFloatElements;
   const allowInteractionOverflow = dragState !== null;
 
-  const hideSelectionChrome = suppressSelectionChrome || dragState !== null;
+  const syncInteractionPortalLayout = useCallback(() => {
+    const wrapper = canvasWrapperRef.current;
+    const portal = interactionPortalRef.current;
+    if (!wrapper || !portal) return;
+    const rect = wrapper.getBoundingClientRect();
+    portal.style.left = `${rect.left}px`;
+    portal.style.top = `${rect.top}px`;
+    portal.style.width = `${rect.width}px`;
+    portal.style.height = `${rect.height}px`;
+  }, []);
+
+  useEffect(() => {
+    if (!allowInteractionOverflow) return;
+    syncInteractionPortalLayout();
+    window.addEventListener('scroll', syncInteractionPortalLayout, true);
+    window.addEventListener('resize', syncInteractionPortalLayout);
+    return () => {
+      window.removeEventListener('scroll', syncInteractionPortalLayout, true);
+      window.removeEventListener('resize', syncInteractionPortalLayout);
+    };
+  }, [allowInteractionOverflow, syncInteractionPortalLayout]);
+
+  const hideSelectionChrome = suppressSelectionChrome || dragState?.type === 'drag';
+  const resizingPreviewElement =
+    dragState?.type === 'resize'
+      ? interactionFloatElements?.find((el) => el.id === dragState.elementId)
+      : null;
 
   const overlayElements = filterVisibleElements(template.elements);
 
@@ -1152,7 +1287,103 @@ export const LabelDesigner: React.FC<LabelDesignerProps> = ({
     </div>
   );
 
+  const showInteractionFloatPortal =
+    typeof document !== 'undefined' &&
+    ((dragState?.type === 'drag' && dragFloatElements.length > 0) ||
+      (resizeFloatElements && resizeFloatElements.length > 0));
+
+  const interactionFloatPortal = showInteractionFloatPortal
+    ? createPortal(
+        <div
+          ref={interactionPortalRef}
+          className="pointer-events-none"
+          style={{
+            position: 'fixed',
+            left: 0,
+            top: 0,
+            width: 0,
+            height: 0,
+            overflow: 'visible',
+            zIndex: 10000,
+          }}
+        >
+          {dragState?.type === 'drag' && dragFloatElements.length > 0 && (
+            <div
+              ref={dragFloatLayerRef}
+              className="absolute inset-0 pointer-events-none"
+              style={{
+                overflow: 'visible',
+                willChange: 'transform',
+              }}
+            >
+              {dragFloatElements.map((el) => (
+                <div
+                  key={el.id}
+                  className="absolute pointer-events-none"
+                  style={{
+                    left: `${mmToPx(el.x, displayZoom)}px`,
+                    top: `${mmToPx(el.y, displayZoom)}px`,
+                    width: `${mmToPx(el.width, displayZoom)}px`,
+                    height: `${mmToPx(el.height, displayZoom)}px`,
+                  }}
+                >
+                  <div
+                    data-drag-float-placeholder={el.id}
+                    className="absolute inset-0 bg-white border border-[#31a8ff]/40 shadow-[0_1px_4px_rgba(0,0,0,0.12)]"
+                  />
+                  <img
+                    ref={(node) => {
+                      if (node) {
+                        dragFloatImgRefs.current.set(el.id, node);
+                        const url = dragFloatUrlsRef.current[el.id];
+                        if (url) {
+                          node.src = url;
+                          if (node.complete) {
+                            node.style.opacity = '1';
+                            const placeholder = node.previousElementSibling as HTMLElement | null;
+                            if (placeholder) placeholder.style.display = 'none';
+                          }
+                        }
+                      } else {
+                        dragFloatImgRefs.current.delete(el.id);
+                      }
+                    }}
+                    alt=""
+                    className="absolute inset-0 w-full h-full pointer-events-none select-none opacity-0"
+                    onLoad={(e) => {
+                      const img = e.currentTarget;
+                      img.style.opacity = '1';
+                      const placeholder = img.previousElementSibling as HTMLElement | null;
+                      if (placeholder) placeholder.style.display = 'none';
+                    }}
+                  />
+                </div>
+              ))}
+            </div>
+          )}
+          {resizeFloatElements && resizeFloatElements.length > 0 && (
+            <div
+              className="absolute inset-0 pointer-events-none"
+              style={{ overflow: 'visible' }}
+            >
+              {resizeFloatElements.map((el) => (
+                <ElementFloatPreview
+                  key={el.id}
+                  element={el}
+                  renderScale={canvasRenderScale}
+                  displayZoom={displayZoom}
+                  variableDefaults={previewDefaults}
+                />
+              ))}
+            </div>
+          )}
+        </div>,
+        document.body
+      )
+    : null;
+
   return (
+    <>
     <div
       className={
         isMobileLayout
@@ -1189,6 +1420,7 @@ export const LabelDesigner: React.FC<LabelDesignerProps> = ({
           }}
         >
           <div
+            ref={canvasWrapperRef}
             className="relative shrink-0 grow-0"
             style={{
               width: `${canvasDisplayW}px`,
@@ -1252,17 +1484,22 @@ export const LabelDesigner: React.FC<LabelDesignerProps> = ({
                 dragState?.type === 'drag' && !!dragMovingIdSet?.has(element.id);
               const isBeingResized =
                 dragState?.type === 'resize' && dragState.elementId === element.id;
-              if (isBeingDragged || isBeingResized) {
+              if (isBeingDragged) {
                 return null;
               }
 
+              const overlayElement =
+                isBeingResized && resizingPreviewElement ? resizingPreviewElement : element;
+
               const showSelectionRing = isSelected && !hideSelectionChrome;
               const showResizeHandles =
-                showSelectionRing && selectedElementIds.length === 1;
+                showSelectionRing &&
-              const elemX = mmToPx(element.x, displayZoom);
+                selectedElementIds.length === 1 &&
-              const elemY = mmToPx(element.y, displayZoom);
+                dragState?.type !== 'resize';
-              const elemW = mmToPx(element.width, displayZoom);
+              const elemX = mmToPx(overlayElement.x, displayZoom);
-              const elemH = mmToPx(element.height, displayZoom);
+              const elemY = mmToPx(overlayElement.y, displayZoom);
+              const elemW = mmToPx(overlayElement.width, displayZoom);
+              const elemH = mmToPx(overlayElement.height, displayZoom);
 
               return (
                 <div
@@ -1282,12 +1519,21 @@ export const LabelDesigner: React.FC<LabelDesignerProps> = ({
                     top: `${elemY}px`,
                     width: `${elemW}px`,
                     height: `${elemH}px`,
-                    zIndex: isSelected ? index + 1000 : index + 10,
+                    zIndex: isBeingResized
-                    transform: element.rotation ? `rotate(${element.rotation}deg)` : undefined,
+                      ? index + 2000
+                      : isSelected
+                      ? index + 1000
+                      : index + 10,
+                    transform: overlayElement.rotation
+                      ? `rotate(${overlayElement.rotation}deg)`
+                      : undefined,
                     transformOrigin: 'center center',
+                    pointerEvents: isBeingResized ? 'none' : undefined,
                   }}
                   onPointerDown={
-                    isLocked ? undefined : (e) => handleElementPointerDown(e, element, 'drag')
+                    isLocked || isBeingResized
+                      ? undefined
+                      : (e) => handleElementPointerDown(e, element, 'drag')
                   }
                   onClick={isLocked ? undefined : (e) => handleElementClick(e, element)}
                 >
@@ -1336,28 +1582,6 @@ export const LabelDesigner: React.FC<LabelDesignerProps> = ({
             })}
           </div>
 
-          {interactionFloatCanvasElements && interactionFloatCanvasElements.length > 0 && (
-            <div
-              ref={dragFloatLayerRef}
-              className="absolute top-0 left-0 pointer-events-none z-[10]"
-              style={{
-                width: `${canvasDisplayW}px`,
-                height: `${canvasDisplayH}px`,
-                overflow: 'visible',
-                willChange: dragState?.type === 'drag' ? 'transform' : undefined,
-              }}
-            >
-              {interactionFloatCanvasElements.map((el) => (
-                <ElementFloatPreview
-                  key={el.id}
-                  element={el}
-                  renderScale={canvasRenderScale}
-                  displayZoom={displayZoom}
-                  variableDefaults={previewDefaults}
-                />
-              ))}
-            </div>
-          )}
           </div>
         </div>
 
@@ -1420,5 +1644,7 @@ export const LabelDesigner: React.FC<LabelDesignerProps> = ({
         )}
       </div>
     </div>
+    {interactionFloatPortal}
+    </>
   );
 };

src/components/PropSidebar.tsx

@@ -153,7 +153,7 @@ const PropTextarea: React.FC<PropTextareaProps> = ({ value, onCommit, ...props }
 
 export type MobilePropModule = 'content' | 'properties' | 'layers' | 'nudge';
 
-const MOBILE_NUDGE_STEP_MM = 0.5;
+const MOBILE_NUDGE_STEP_MM = 0.1;
 
 interface PropSidebarProps {
   template: LabelTemplate;

src/labelRenderer.ts

@@ -252,6 +252,8 @@ export interface RenderLabelOptions {
   /** 输出格式，默认 png */
   imageFormat?: 'png' | 'jpeg';
   jpegQuality?: number;
+  /** 为 false 时不裁剪到画布边界（用于拖动浮层完整显示元素） */
+  clipToCanvas?: boolean;
 }
 
 /** 离屏渲染标签为 PNG data URL */
@@ -269,6 +271,7 @@ export async function renderLabelToDataUrl(options: RenderLabelOptions): Promise
     scale: scaleOption = 16,
     imageFormat = 'png',
     jpegQuality = 0.92,
+    clipToCanvas = true,
   } = options;
 
   const scale = scaleOption;
@@ -295,9 +298,11 @@ export async function renderLabelToDataUrl(options: RenderLabelOptions): Promise
   }
 
   ctx.save();
-  ctx.beginPath();
+  if (clipToCanvas) {
-  ctx.rect(0, 0, canvas.width, canvas.height);
+    ctx.beginPath();
-  ctx.clip();
+    ctx.rect(0, 0, canvas.width, canvas.height);
+    ctx.clip();
+  }
 
   for (const elem of elements) {
     const ex = Math.round(elem.x * scale);