improve RemoveBackground comparison view and split line styling

apps/jingrow/frontend/src/views/tools/RemoveBackground.vue

@@ -39,69 +39,67 @@
             <div class="image-preview-container">
               <div class="preview-header">
                 <h3>{{ t('Image Preview') }}</h3>
-                <button class="change-image-btn" @click="resetUpload">
-                  <i class="fa fa-refresh"></i>
-                  {{ t('Change Image') }}
-                </button>
+                <div class="header-actions">
+                  <n-button
+                    v-if="resultImage"
+                    size="medium"
+                    @click="handleDownload"
+                    class="download-btn"
+                  >
+                    <template #icon>
+                      <i class="fa fa-download"></i>
+                    </template>
+                    {{ t('Download') }}
+                  </n-button>
+                  <button class="change-image-btn" @click="resetUpload">
+                    <i class="fa fa-refresh"></i>
+                    {{ t('Change Image') }}
+                  </button>
+                </div>
               </div>
               
-              <div class="preview-grid">
-                <!-- 原图 -->
-                <div class="preview-card">
-                  <div class="preview-label">{{ t('Original') }}</div>
-                  <div class="image-wrapper">
+              <!-- 单窗口对比视图 -->
+              <div class="comparison-view" v-if="resultImage">
+                <div class="comparison-container" ref="comparisonContainerRef">
+                  <!-- 原图（显示左侧部分） -->
+                  <div 
+                    class="comparison-image original-image" 
+                    :style="{ clipPath: `inset(0 ${100 - splitPosition}% 0 0)` }"
+                  >
                     <img :src="uploadedImageUrl" alt="Original" />
-                    <div v-if="processing" class="processing-overlay">
-                      <div class="spinner"></div>
-                      <p>{{ t('Processing...') }}</p>
-                    </div>
                   </div>
-                </div>
-
-                <!-- 去背景后的图片 -->
-                <div class="preview-card">
-                  <div class="preview-label">{{ t('Background Removed') }}</div>
-                  <div class="image-wrapper">
-                    <div v-if="!resultImage && !processing" class="placeholder">
-                      <i class="fa fa-image"></i>
-                      <p>{{ t('Result will appear here') }}</p>
-                    </div>
-                    <img v-else-if="resultImage" :src="resultImageUrl" alt="Result" />
-                    <div v-else class="processing-overlay">
-                      <div class="spinner"></div>
-                      <p>{{ t('Processing...') }}</p>
+                  
+                  <!-- 去背景后的图片（显示右侧部分） -->
+                  <div 
+                    class="comparison-image result-image" 
+                    :style="{ clipPath: `inset(0 0 0 ${splitPosition}%)` }"
+                  >
+                    <img :src="resultImageUrl" alt="Result" />
+                  </div>
+                  
+                  <!-- 拖动竖线 -->
+                  <div 
+                    class="split-line"
+                    :class="{ 'dragging': isDraggingSplitLine }"
+                    :style="{ left: `${splitPosition}%` }"
+                    @mousedown.prevent.stop="handleSplitLineMouseDown"
+                  >
+                    <div class="split-line-handle">
+                      <i class="fa fa-arrows-h"></i>
                     </div>
                   </div>
                 </div>
               </div>
-
-              <!-- 操作按钮 -->
-              <div class="action-buttons">
-                <n-button
-                  type="primary"
-                  size="large"
-                  :loading="processing"
-                  :disabled="!uploadedImage || processing"
-                  @click="handleRemoveBackground"
-                  class="process-btn"
-                >
-                  <template #icon>
-                    <i class="fa fa-magic"></i>
-                  </template>
-                  {{ processing ? t('Processing...') : t('Remove Background') }}
-                </n-button>
-                
-                <n-button
-                  v-if="resultImage"
-                  size="large"
-                  @click="handleDownload"
-                  class="download-btn"
-                >
-                  <template #icon>
-                    <i class="fa fa-download"></i>
-                  </template>
-                  {{ t('Download') }}
-                </n-button>
+              
+              <!-- 处理中或未处理状态 -->
+              <div v-else class="single-image-view">
+                <div class="image-wrapper">
+                  <img :src="uploadedImageUrl" alt="Original" />
+                  <div v-if="processing" class="processing-overlay">
+                    <div class="spinner"></div>
+                    <p>{{ t('Processing...') }}</p>
+                  </div>
+                </div>
               </div>
             </div>
           </div>
@@ -157,6 +155,9 @@ const resultImageUrl = computed(() => {
 // 状态
 const isDragging = ref(false)
 const processing = ref(false)
+const splitPosition = ref(50) // 分割线位置（百分比）
+const comparisonContainerRef = ref<HTMLElement | null>(null)
+const isDraggingSplitLine = ref(false)
 
 // 触发文件选择
 const triggerFileInput = () => {
@@ -209,11 +210,14 @@ const processFile = (file: File) => {
 
   uploadedImage.value = file
   resultImage.value = ''
+  splitPosition.value = 50 // 重置分割线位置
   
   // 创建预览URL
   const reader = new FileReader()
   reader.onload = (e) => {
     uploadedImageUrl.value = e.target?.result as string
+    // 上传后自动触发去背景
+    handleRemoveBackground()
   }
   reader.readAsDataURL(file)
 }
@@ -223,11 +227,36 @@ const resetUpload = () => {
   uploadedImage.value = null
   uploadedImageUrl.value = ''
   resultImage.value = ''
+  splitPosition.value = 50
   if (fileInputRef.value) {
     fileInputRef.value.value = ''
   }
 }
 
+// 拖动竖线处理
+const handleSplitLineMouseDown = (e: MouseEvent) => {
+  e.preventDefault()
+  isDraggingSplitLine.value = true
+  
+  const handleMouseMove = (moveEvent: MouseEvent) => {
+    if (!comparisonContainerRef.value || !isDraggingSplitLine.value) return
+    
+    const rect = comparisonContainerRef.value.getBoundingClientRect()
+    const x = moveEvent.clientX - rect.left
+    const percentage = Math.max(0, Math.min(100, (x / rect.width) * 100))
+    splitPosition.value = percentage
+  }
+  
+  const handleMouseUp = () => {
+    isDraggingSplitLine.value = false
+    document.removeEventListener('mousemove', handleMouseMove)
+    document.removeEventListener('mouseup', handleMouseUp)
+  }
+  
+  document.addEventListener('mousemove', handleMouseMove)
+  document.addEventListener('mouseup', handleMouseUp)
+}
+
 // 处理去背景
 const handleRemoveBackground = async () => {
   // 检查用户是否已登录
@@ -378,6 +407,14 @@ const handleDownload = () => {
   width: 100%;
   padding: 16px;
   min-height: 100vh;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+}
+
+.remove-background-page > .page-content {
+  width: 100%;
+  max-width: 1000px;
 }
 
 .page-header {
@@ -592,9 +629,114 @@ h1 {
   letter-spacing: 0.5px;
 }
 
+/* 对比视图 */
+.comparison-view {
+  width: 100%;
+  margin-bottom: 24px;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+}
+
+.comparison-container {
+  position: relative;
+  width: 60%;
+  max-width: 600px;
+  aspect-ratio: 1;
+  border-radius: 12px;
+  overflow: hidden;
+  background: 
+    linear-gradient(45deg, #f1f5f9 25%, transparent 25%),
+    linear-gradient(-45deg, #f1f5f9 25%, transparent 25%),
+    linear-gradient(45deg, transparent 75%, #f1f5f9 75%),
+    linear-gradient(-45deg, transparent 75%, #f1f5f9 75%);
+  background-size: 20px 20px;
+  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
+}
+
+.comparison-image {
+  position: absolute;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+  
+  img {
+    width: 100%;
+    height: 100%;
+    object-fit: contain;
+    display: block;
+  }
+}
+
+.original-image {
+  z-index: 1;
+  /* clip-path 通过内联样式动态设置，用于裁剪显示区域 */
+}
+
+.result-image {
+  z-index: 2;
+  /* clip-path 通过内联样式动态设置，用于裁剪显示区域 */
+}
+
+/* 拖动竖线 */
+.split-line {
+  position: absolute;
+  top: 0;
+  bottom: 0;
+  width: 2px;
+  background: transparent;
+  cursor: col-resize;
+  z-index: 10;
+  transform: translateX(-50%);
+  transition: left 0s;
+  user-select: none;
+  pointer-events: auto;
+  
+  &:hover {
+    width: 2px;
+  }
+  
+  &.dragging {
+    transition: none;
+    cursor: col-resize;
+  }
+}
+
+.split-line-handle {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+  width: 40px;
+  height: 40px;
+  background: rgba(255, 255, 255, 0.95);
+  border-radius: 50%;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
+  border: 2px solid #1fc76f;
+  
+  i {
+    color: #1fc76f;
+    font-size: 16px;
+  }
+}
+
+/* 单图视图 */
+.single-image-view {
+  width: 100%;
+  margin-bottom: 24px;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+}
+
 .image-wrapper {
   position: relative;
-  width: 100%;
+  width: 60%;
+  max-width: 600px;
   aspect-ratio: 1;
   border-radius: 8px;
   overflow: hidden;