采集卡bug修复

preview.py

@@ -161,6 +161,10 @@ class PreviewWindow:
     
     def create_grid_window(self):
         """创建网格窗口"""
+        # 重新加载配置，确保获取最新值
+        config_manager.load_config()
+        self.config = config_manager.config
+        
         # 获取显示配置
         display = self.config.get('display', {})
         preview_width = display.get('preview_width', 1000)
@@ -168,6 +172,20 @@ class PreviewWindow:
         columns = display.get('preview_columns', 2)
         rows = display.get('preview_rows', 2)
         
+        # 验证配置值是否有效（防止读取到无效的小值）
+        if preview_width < 100 or preview_height < 100:
+            print(f"⚠️ 警告: 配置中的预览尺寸无效 ({preview_width}x{preview_height})，使用默认值")
+            preview_width = 1000
+            preview_height = 700
+        
+        if columns < 1 or columns > 10:
+            columns = 2
+        if rows < 1 or rows > 10:
+            rows = 2
+        
+        # 调试输出配置值
+        print(f"📐 预览窗口配置: {preview_width}x{preview_height}, 网格: {columns}x{rows}")
+        
         root = tk.Tk()
         root.title("采集卡预览 - 点击放大")
         root.geometry(f"{preview_width}x{preview_height}")
@@ -227,6 +245,10 @@ class PreviewWindow:
                 texts_to_draw = []
                 frame_idx = 0
                 
+                # 确保至少有一些采集卡数据
+                if not self.caps:
+                    texts_to_draw.append((canvas_width // 2, canvas_height // 2, "未找到采集卡", 'red'))
+                
                 for idx in self.caps.keys():
                     row = frame_idx // columns
                     col = frame_idx % columns
@@ -306,26 +328,52 @@ class PreviewWindow:
                 canvas.delete("all")
                 
                 # 先绘制所有图像（底层）
-                if images_to_draw and self.debug_count <= 3:
-                    print(f"✅ 准备绘制 {len(images_to_draw)} 个图像到画布 ({canvas_width}x{canvas_height})")
+                if self.debug_count <= 3:
+                    print(f"📊 绘制状态: {len(images_to_draw)} 个图像, {len(texts_to_draw)} 个文本, 画布={canvas_width}x{canvas_height}")
                     
-                for photo, x, y in images_to_draw:
-                    try:
-                        canvas.create_image(x, y, image=photo, anchor='center')
-                    except Exception as e:
-                        if "pyimage" not in str(e).lower():
-                            print(f"绘制图像错误: {e}")
+                if images_to_draw:
+                    for i, (photo, x, y) in enumerate(images_to_draw):
+                        try:
+                            # 确保坐标在画布范围内
+                            if 0 <= x <= canvas_width and 0 <= y <= canvas_height:
+                                canvas.create_image(x, y, image=photo, anchor='center')
+                                if self.debug_count <= 3 and i == 0:
+                                    print(f"   绘制图像 #{i} 到位置 ({x}, {y})")
+                            else:
+                                if self.debug_count <= 3:
+                                    print(f"   ⚠️ 图像 #{i} 位置 ({x}, {y}) 超出画布范围")
+                        except Exception as e:
+                            print(f"   绘制图像 #{i} 错误: {e}")
+                            import traceback
+                            traceback.print_exc()
+                else:
+                    # 如果没有图像，至少显示一些提示
+                    if self.debug_count <= 3:
+                        print("   ⚠️ 没有图像可绘制")
+                    # 在画布中心显示提示
+                    canvas.create_text(
+                        canvas_width // 2, 
+                        canvas_height // 2, 
+                        text="等待画面...\n\n如果长时间无画面，请检查：\n1. 采集卡是否正常工作\n2. 配置是否正确", 
+                        fill='yellow', 
+                        font=('Arial', 14),
+                        justify=tk.CENTER
+                    )
                 
                 # 再绘制所有文本（上层）
                 for x, y, text, color in texts_to_draw:
                     try:
-                        if color == 'white':
-                            canvas.create_text(x, y, text=text, fill=color, font=('Arial', 10, 'bold'))
-                        else:
-                            canvas.create_text(x, y, text=text, fill=color, font=('Arial', 10))
+                        if 0 <= x <= canvas_width and 0 <= y <= canvas_height:
+                            if color == 'white':
+                                canvas.create_text(x, y, text=text, fill=color, font=('Arial', 10, 'bold'))
+                            else:
+                                canvas.create_text(x, y, text=text, fill=color, font=('Arial', 10))
                     except Exception as e:
                         print(f"绘制文本错误: {e}")
                 
+                # 强制更新画布显示
+                canvas.update_idletasks()
+                
                 # 绘制分割线，区分不同的采集卡窗口
                 try:
                     # 绘制垂直分割线（列之间的分割线）