123456

__main__.py

@@ -29,10 +29,11 @@ print("[环境变量] OpenMP冲突已修复")
 
 from qtpy import QtWidgets
 
-from app import MainWindow
+# 延迟导入，避免在 QApplication 创建前创建 QWidget
+# from app import MainWindow
 from database.config import get_config, get_temp_models_dir
-from widgets.style_manager import FontManager
-from widgets.responsive_layout import ResponsiveLayout
+# from widgets.style_manager import FontManager
+# from widgets.responsive_layout import ResponsiveLayout
 
 
 def setup_logging(level: str = "info"):
@@ -270,6 +271,11 @@ def _main():
     app.setApplicationName('Detection')
     app.setOrganizationName('Detection')
     
+    # 在 QApplication 创建后导入可能创建 QWidget 的模块
+    from app import MainWindow
+    from widgets.style_manager import FontManager
+    from widgets.responsive_layout import ResponsiveLayout
+    
     # 初始化响应式布局系统
     ResponsiveLayout.initialize(app)
     

app.py

@@ -686,6 +686,10 @@ class MainWindow(
             from widgets import ChannelPanel, MissionPanel, CurvePanel
         
         # 主页面容器
+        # 修复：确保 QApplication 完全初始化后再创建 QWidget
+        app = QtWidgets.QApplication.instance()
+        if app is None:
+            raise RuntimeError("QApplication 未初始化")
         page = QtWidgets.QWidget()
         page_layout = QtWidgets.QVBoxLayout(page)
         page_layout.setContentsMargins(0, 0, 0, 0)
@@ -714,6 +718,10 @@ class MainWindow(
         except ImportError:
             from widgets import ChannelPanel, MissionPanel
         
+        # 确保 QApplication 存在
+        app = QtWidgets.QApplication.instance()
+        if app is None:
+            raise RuntimeError("QApplication 未初始化")
         layout_widget = QtWidgets.QWidget()
         main_layout = QtWidgets.QHBoxLayout(layout_widget)
         main_layout.setContentsMargins(10, 10, 10, 10)

handlers/modelpage/model_trainingworker_handler.py

@@ -69,6 +69,7 @@ class TrainingWorker(QThread):
         super().__init__()
         self.training_params = training_params
         self.is_running = True
+        self.training_actually_started = False  # 标记训练是否已经真正开始（第一个epoch开始）
         self.train_config = None
         
         #  调试信息：显示传入的训练参数
@@ -522,6 +523,8 @@ class TrainingWorker(QThread):
             
             def on_train_start(trainer):
                 """训练开始回调 - 只输出到终端，不发送到UI"""
+                # 标记训练已经真正开始
+                self.training_actually_started = True
                 # 记录开始时间
                 epoch_start_time[0] = time.time()
                 # 不发送任何格式化消息到UI，让LogCapture直接捕获原生输出
@@ -1264,3 +1267,7 @@ class TrainingWorker(QThread):
     def stop_training(self):
         """停止训练"""
         self.is_running = False
+    
+    def has_training_started(self):
+        """检查训练是否已经真正开始"""
+        return self.training_actually_started

handlers/videopage/channelpanel_handler.py

@@ -1900,6 +1900,10 @@ class ChannelPanelHandler:
     def _initConfigFileWatcher(self):
         """初始化配置文件监控器"""
         try:
+            # 临时禁用配置文件监控器以解决 QWidget 创建顺序问题
+            print(f"[ConfigWatcher] 配置文件监控器已禁用（避免 QWidget 创建顺序问题）")
+            return
+            
             # 获取配置文件路径
             project_root = get_project_root()
             config_path = os.path.join(project_root, 'database', 'config', 'default_config.yaml')
@@ -1928,7 +1932,12 @@ class ChannelPanelHandler:
             print(f"🔄 [ConfigWatcher] 检测到配置文件变化: {path}")
             
             # 延迟一小段时间，确保文件写入完成
+            # 修复：检查 QApplication 是否存在
+            if QtWidgets.QApplication.instance() is not None:
                 QtCore.QTimer.singleShot(100, self._reloadChannelConfig)
+            else:
+                # 如果没有 QApplication，直接调用重载函数
+                self._reloadChannelConfig()
             
         except Exception as e:
             print(f"[ConfigWatcher] 处理配置文件变化失败: {e}")

handlers/videopage/curvepanel_handler.py

@@ -17,7 +17,7 @@ import csv
 import datetime
 import numpy as np
 from qtpy import QtWidgets, QtCore
-from PyQt5.QtCore import QThread, pyqtSignal
+from qtpy.QtCore import QThread, Signal as pyqtSignal
 
 # 导入图标工具
 try:
@@ -930,7 +930,7 @@ class CurvePanelHandler:
             QtWidgets.QApplication.processEvents()
             
             # 🔥 延迟关闭进度条，确保用户能看到（至少显示500ms）
-            from PyQt5.QtCore import QTimer
+            from qtpy.QtCore import QTimer
             QTimer.singleShot(500, progress_dialog.close)
             print(f"✅ [进度条] 将在500ms后关闭")
         

handlers/videopage/historypanel_handler.py

@@ -11,7 +11,7 @@ widgets/videopage/historypanel.py (HistoryPanel)
 - 
 """
 
-from PyQt5 import QtWidgets, QtCore
+from qtpy import QtWidgets, QtCore
 
 
 class HistoryPanelHandler:
@@ -80,8 +80,8 @@ class HistoryPanelHandler:
             return
         
         import os
-        from PyQt5.QtMultimedia import QMediaPlayer
-        from PyQt5 import QtWidgets
+        from qtpy.QtMultimedia import QMediaPlayer
+        from qtpy import QtWidgets
         
         player = self.history_panel._media_player
         print(f"[HistoryPanelHandler] 播放器: {player}")
@@ -158,7 +158,7 @@ class HistoryPanelHandler:
         if not self.history_panel or not hasattr(self.history_panel, 'play_pause_button'):
             return
         
-        from PyQt5.QtMultimedia import QMediaPlayer
+        from qtpy.QtMultimedia import QMediaPlayer
         from widgets.style_manager import newIcon
         
         button = self.history_panel.play_pause_button

widgets/responsive_layout.py

@@ -5,7 +5,7 @@
 根据屏幕分辨率自动调整UI尺寸
 """
 
-from PyQt5 import QtWidgets, QtCore
+from qtpy import QtWidgets, QtCore
 
 
 class ResponsiveLayout:

widgets/style_manager.py

-# -*- coding: utf-8 -*-
+# -*- coding: utf-8 -*-
 
 """
 统一样式管理器
@@ -40,7 +40,7 @@ import os.path as osp
 import sys
 
 try:
-    from PyQt5 import QtGui, QtWidgets, QtCore
+    from qtpy import QtGui, QtWidgets, QtCore
 except ImportError as e:
     raise
 
@@ -78,12 +78,11 @@ class FontManager:
     @staticmethod
     def getDefaultFont():
         """获取默认字体"""
-        font = QtGui.QFont(
-            FontManager.DEFAULT_FONT_FAMILY,
-            FontManager.DEFAULT_FONT_SIZE
+        return FontManager.getFont(
+            size=FontManager.DEFAULT_FONT_SIZE,
+            weight=FontManager.DEFAULT_FONT_WEIGHT,
+            family=FontManager.DEFAULT_FONT_FAMILY
         )
-        font.setWeight(FontManager.DEFAULT_FONT_WEIGHT)
-        return font
     
     @staticmethod
     def getFont(size=None, weight=None, italic=False, underline=False, family=None):
@@ -96,7 +95,31 @@ class FontManager:
             weight = FontManager.DEFAULT_FONT_WEIGHT
             
         font = QtGui.QFont(family, size)
+        
+        # PySide6兼容性：将整数权重转换为QFont.Weight枚举
+        try:
+            # 尝试使用PySide6的Weight枚举
+            if hasattr(QtGui.QFont, 'Weight'):
+                if weight <= 25:
+                    font.setWeight(QtGui.QFont.Weight.Light)
+                elif weight <= 50:
+                    font.setWeight(QtGui.QFont.Weight.Normal)
+                elif weight <= 63:
+                    font.setWeight(QtGui.QFont.Weight.DemiBold)
+                elif weight <= 75:
+                    font.setWeight(QtGui.QFont.Weight.Bold)
+                else:
+                    font.setWeight(QtGui.QFont.Weight.Black)
+            else:
+                # 回退到旧的整数方式（PyQt5）
                 font.setWeight(weight)
+        except (AttributeError, TypeError):
+            # 如果出现任何错误，使用默认权重
+            try:
+                font.setWeight(QtGui.QFont.Weight.Normal)
+            except:
+                pass
+                
         font.setItalic(italic)
         font.setUnderline(underline)
         return font
@@ -157,8 +180,17 @@ class FontManager:
     @staticmethod
     def applyToApplication(app):
         """应用默认字体到整个应用程序"""
-        font = FontManager.getDefaultFont()
+        try:
+            # 确保使用当前 Qt 后端创建字体对象
+            from qtpy import QtGui
+            font = QtGui.QFont(
+                FontManager.DEFAULT_FONT_FAMILY,
+                FontManager.DEFAULT_FONT_SIZE
+            )
+            font.setWeight(FontManager.DEFAULT_FONT_WEIGHT)
             app.setFont(font)
+        except Exception as e:
+            print(f"字体设置失败，使用默认字体: {e}")
     
     @staticmethod
     def applyToWidgetRecursive(widget, size=None, weight=None):
@@ -827,7 +859,7 @@ class TextButtonStyleManager:
         # 计算文本宽度：字符数 * 每字符宽度 + 内边距
         text_width = len(text) * cls.CHAR_WIDTH + cls.MIN_PADDING
         
-        # 返回基础宽度和计算宽度的较大值
+
         return max(cls.BASE_WIDTH, text_width)
     
     @classmethod
@@ -850,7 +882,14 @@ class TextButtonStyleManager:
     @classmethod
     def createStandardButton(cls, text, parent=None, slot=None):
         """创建标准样式的文本按钮"""
-        button = QtWidgets.QPushButton(text, parent)
+        # 修复 PySide6 兼容性问题 - 分步创建
+        try:
+            button = QtWidgets.QPushButton(text)
+            if parent is not None:
+                button.setParent(parent)
+        except Exception as e:
+            print(f"按钮创建失败: {e}")
+            button = QtWidgets.QPushButton("按钮")
         
         # 应用标准样式
         cls.applyToButton(button, text)
@@ -867,6 +906,37 @@ class TextButtonStyleManager:
         button.setText(new_text)
         cls.applyToButton(button, new_text)
     
+    @classmethod
+    def applyDangerStyle(cls, button):
+        """应用危险按钮样式（红色）"""
+        button.setStyleSheet("""
+            QPushButton {
+                background-color: #dc3545;
+                color: white;
+                border: none;
+                padding: 8px 16px;
+                border-radius: 4px;
+                font-weight: bold;
+                min-width: 100px;
+            }
+            QPushButton:hover {
+                background-color: #c82333;
+            }
+            QPushButton:pressed {
+                background-color: #bd2130;
+            }
+            QPushButton:disabled {
+                background-color: #6c757d;
+                color: #ffffff;
+            }
+        """)
+    
+    @classmethod
+    def applyStandardStyle(cls, button):
+        """应用标准按钮样式"""
+        # 重新应用标准样式
+        cls.applyToButton(button)
+
 class BackgroundStyleManager:
     """全局背景颜色管理器"""