可视化面板：全方位事件过滤器劫持，彻底阻断Ctrl+滚轮的滚动穿透

src/gui/panels/visualization_panel.py

@@ -864,13 +864,13 @@ class ImageViewerWidget(QWidget):
         self.original_btn.setToolTip("原始大小")
         toolbar.addWidget(self.original_btn)
 
-        self.hint_label = QLabel("💡 提示: Ctrl+滚轮 缩放 | 滚轮 上下移动 | 拖拽 平移")
+        self.hint_label = QLabel("💡 提示: 按住 Ctrl+滚轮 可以实现放大缩小")
         self.hint_label.setStyleSheet("""
             QLabel {
-                color: #888888;
-                font-size: 12px;
+                color: #444444;
+                font-size: 14px;
+                font-weight: bold;
                 padding-left: 15px;
-                font-style: italic;
             }
         """)
         toolbar.addWidget(self.hint_label)
@@ -892,6 +892,13 @@ class ImageViewerWidget(QWidget):
         self.image_label.setStyleSheet("background-color:  white;")
 
         self.scroll_area.setWidget(self.image_label)
+
+        # 全方位事件拦截：给所有可能触发滚轮的子组件全部挂载过滤器
+        self.image_label.installEventFilter(self)
+        self.scroll_area.viewport().installEventFilter(self)
+        self.scroll_area.installEventFilter(self)
+        self.scroll_area.verticalScrollBar().installEventFilter(self)
+        self.scroll_area.horizontalScrollBar().installEventFilter(self)
         layout.addWidget(self.scroll_area, 1)
 
         status_layout = QHBoxLayout()
@@ -960,21 +967,24 @@ class ImageViewerWidget(QWidget):
         self.image_label.setPixmap(scaled_pixmap)
         self._pending_scale = None
 
-    def wheelEvent(self, event):
-        """鼠标滚轮缩放与滚动 - Ctrl+滚轮缩放，纯滚轮上下滚动"""
+    def eventFilter(self, obj, event):
+        from PyQt5.QtCore import QEvent, Qt
+
+        if event.type() == QEvent.Wheel:
             if event.modifiers() == Qt.ControlModifier:
+                if obj is self.scroll_area.viewport() or obj is self.image_label:
                     delta = event.angleDelta().y()
                     if delta > 0:
-                if self.scale_factor < 5.0:
+                        if getattr(self, 'scale_factor', 1.0) < 5.0:
                             self.scale_factor = min(self.scale_factor * 1.1, 5.0)
                             self.update_image_display()
                     else:
-                if self.scale_factor > 0.1:
+                        if getattr(self, 'scale_factor', 1.0) > 0.1:
                             self.scale_factor = max(self.scale_factor / 1.1, 0.1)
                             self.update_image_display()
-            event.accept()
-        else:
-            super().wheelEvent(event)
+                return True
+
+        return super().eventFilter(obj, event)
 
     def zoom_in(self):
         """放大"""