修复combobox刷新值时combobox对象已删除bug

UI/VarManages/ModbusModel.py

@@ -182,34 +182,43 @@ class VarTableModel(QAbstractTableModel):
         #功能类型的index是5，通讯类型index是10
         
         for i in range(len(self.datas)):
-            cbRow = str('cb' + str(i) + str(comboBoxColumn))
+            try:
                 index = self.index(i, int(comboBoxColumn))
-            delegate = self.table.itemDelegate(index)
                 
-            # 方法1：尝试通过indexWidget获取已存在的comboBox
+                # 方法1：通过indexWidget获取已存在的comboBox
                 widget = self.table.indexWidget(index)
+                comboBox = None
+                
                 if widget is not None:
                     # 从容器widget中获取comboBox
                     comboBox = widget.findChild(QComboBox)
                 else:
                     # 方法2：尝试通过getattr获取委托中的comboBox
                     try:
+                        delegate = self.table.itemDelegate(index)
+                        cbRow = str('cb' + str(i) + str(comboBoxColumn))
                         comboBox = getattr(delegate, cbRow, None)
-                except AttributeError:
+                    except (AttributeError, IndexError):
-                    # 如果属性不存在，跳过这一行
                         continue
                 
-                if comboBox is None:
+                # 检查comboBox对象是否仍然有效
-                    # 如果comboBox不存在，跳过这一行
+                if (comboBox is None or 
+                    not hasattr(comboBox, 'setCurrentText')):
                     continue
                 
-            # 检查comboBox对象是否仍然有效，避免RuntimeError
+                # 尝试设置comboBox的值
-            if not comboBox or comboBox.isHidden():
+                try:
+                    currentValue = str(self.datas[i][comboBoxColumn])
+                    comboBox.setCurrentText(currentValue)
+                except (RuntimeError, AttributeError, IndexError) as e:
+                    # 如果设置值失败，跳过这一行
+                    print(f"设置comboBox值失败 (行 {i}, 列 {comboBoxColumn}): {e}")
                     continue
                     
-            
+            except Exception as e:
-            # 根据数据类型设置comboBox的值
+                # 捕获所有异常，确保程序不会崩溃
-            comboBox.setCurrentText(str(self.datas[i][comboBoxColumn]))
+                print(f"刷新comboBox时出错 (行 {i}, 列 {comboBoxColumn}): {e}")
+                continue
           
                 
 
@@ -240,6 +249,7 @@ class ModbusButtonDelegate(BaseButtonDelegate):
             painter.fillRect(paint_rect, index.data(Qt.BackgroundRole))
         
         if not self.parent().indexWidget(index):
+            try:
                 button1 = QPushButton()
                 button1.setIcon(qtawesome.icon('fa.play', color='#1fbb6f'))
                 button1.setToolTip("启动强制")
@@ -262,7 +272,13 @@ class ModbusButtonDelegate(BaseButtonDelegate):
                 comboBox.addItem('CDAB', 2)
                 comboBox.addItem('BADC', 3)
                 comboBox.addItem('DCBA', 4)
+                
+                try:
                     comboBox.setCurrentText(str(self.parent().model.datas[index.row()][index.column()]))
+                except (IndexError, RuntimeError):
+                    # 如果数据访问失败，设置默认值
+                    comboBox.setCurrentIndex(0)
+                    
                 comboBox.setToolTip("字节序")
 
                 comboBox.currentIndexChanged.connect(self.indexChange)
@@ -309,6 +325,10 @@ class ModbusButtonDelegate(BaseButtonDelegate):
                 comboBox.setObjectName('ModbusOrderBox')
                 
                 self.parent().setIndexWidget(index, widget)
+            except Exception as e:
+                # 捕获异常，确保paint方法不会崩溃
+                print(f"创建按钮时出错 (行 {index.row()}, 列 {index.column()}): {e}")
+                pass
 
     def indexChange(self):
         sender = self.sender()
@@ -538,32 +558,41 @@ class ModbusTypeBox(QItemDelegate):
             painter.fillRect(paint_rect, index.data(Qt.BackgroundRole))
         
         if (index.column() == 5) and index.row() not in self.parent().model.editableList:
+            try:
                 data = self.parent().model.datas[index.row()]
                 comBox = str('cb' + str(index.row()) + str(index.column()))
-            setattr(self, comBox, QComboBox())
-            comboBox = getattr(self, comBox)
-            items = ['Coil Status', 'Input Status', 'Input Register', 'Holding Register']
-            comboBox.addItems(items)
-            if self.parent().model.datas[index.row()][index.column()] in [0, 1]:
-                comboBox.setCurrentIndex(self.parent().model.datas[index.row()][index.column()])
-            elif self.parent().model.datas[index.row()][index.column()] in [3, 4]:
-                comboBox.setCurrentIndex(self.parent().model.datas[index.row()][index.column()] - 1)
-            else:
-                comboBox.setCurrentIndex(0)
                 
-            comboBox.currentIndexChanged.connect(self.indexChange)
+                # 创建容器widget
+                containerWidget = QWidget()
+                containerWidget.setStyleSheet("QComboBox { background-color: transparent; }")
+                
+                # 创建新的comboBox，设置正确的父对象
+                comboBox = QComboBox(containerWidget)
                 comboBox.setObjectName('ModbusTypeBox')
                 comboBox.setEditable(True)
                 comboBox.lineEdit().setAlignment(Qt.AlignCenter)
-            
-            hboxLayout = QHBoxLayout()
-            hboxLayout.addWidget(comboBox)
-            hboxLayout.setContentsMargins(2, 2, 2, 2)
                 comboBox.index = [index.row(), index.column()]
                 
-            # 所有下拉框使用统一样式
+                # 添加选项
-            comboBox.setObjectName('ModbusTypeBox')
+                items = ['Coil Status', 'Input Status', 'Input Register', 'Holding Register']
+                comboBox.addItems(items)
+                
+                # 设置当前值
+                try:
+                    currentValue = self.parent().model.datas[index.row()][index.column()]
+                    if currentValue in [0, 1]:
+                        comboBox.setCurrentIndex(currentValue)
+                    elif currentValue in [3, 4]:
+                        comboBox.setCurrentIndex(currentValue - 1)
+                    else:
+                        comboBox.setCurrentIndex(0)
+                except (IndexError, RuntimeError, AttributeError):
+                    comboBox.setCurrentIndex(0)
+
+                # 连接信号
+                comboBox.currentIndexChanged.connect(self.indexChange)
                 
+                # 设置启用状态
                 if str(data[index.column()]):
                     comboBox.setEnabled(False)
                     comboBox.setProperty('disabled', True)
@@ -571,12 +600,24 @@ class ModbusTypeBox(QItemDelegate):
                     comboBox.setEnabled(True)
                     comboBox.setProperty('disabled', False)
                 
-            widget = QWidget()
+                # 创建布局
-            widget.setStyleSheet("QComboBox { background-color: transparent; }")
+                hboxLayout = QHBoxLayout()
-            widget.setLayout(hboxLayout)
+                hboxLayout.addWidget(comboBox)
-            self.parent().setIndexWidget(index, widget)
+                hboxLayout.setContentsMargins(2, 2, 2, 2)
+                containerWidget.setLayout(hboxLayout)
+                
+                # 设置索引widget
+                self.parent().setIndexWidget(index, containerWidget)
                 self.parent().openPersistentEditor(index)
                 
+                # 保存comboBox引用到委托对象，以便refreshComboBox能够找到它
+                setattr(self, comBox, comboBox)
+                
+            except Exception as e:
+                # 捕获异常，确保paint方法不会崩溃
+                print(f"创建ModbusTypeBox时出错 (行 {index.row()}, 列 {index.column()}): {e}")
+                pass
+
     def indexChange(self):
         sender = self.sender()
         index = sender.currentIndex()
@@ -602,29 +643,54 @@ class ModbusVarModelBox(QItemDelegate):
         
         # 本地值、模拟值、远程值 对应 0, 1, 2
         if (index.column() == self.comBoxColumn) and not self.parent().indexWidget(index):
+            try:
                 data = self.parent().model.datas[index.row()]
                 comBox = str('cb' + str(index.row()) + str(index.column()))
-            setattr(self, comBox, QComboBox())
-            comboBox = getattr(self, comBox)
-            items = ['本地值', '模拟值', '远程值']
-            comboBox.addItems(items)
-            comboBox.setCurrentText(str(self.parent().model.datas[index.row()][index.column()]))
                 
-            comboBox.currentIndexChanged.connect(self.indexChange)
+                # 创建容器widget
+                containerWidget = QWidget()
+                containerWidget.setStyleSheet("QComboBox { background-color: transparent; }")
+                
+                # 创建新的comboBox，设置正确的父对象
+                comboBox = QComboBox(containerWidget)
                 comboBox.setObjectName('ModbusVarModelBox')
                 comboBox.setEditable(True)
                 comboBox.lineEdit().setAlignment(Qt.AlignCenter)
+                comboBox.index = [index.row(), index.column()]
+                
+                # 添加选项
+                items = ['本地值', '模拟值', '远程值']
+                comboBox.addItems(items)
+                
+                # 连接信号
+                comboBox.currentIndexChanged.connect(self.indexChange)
                 
+                # 设置当前值
+                try:
+                    currentValue = str(self.parent().model.datas[index.row()][index.column()])
+                    comboBox.setCurrentText(currentValue)
+                except (IndexError, RuntimeError, AttributeError):
+                    # 如果设置值失败，使用默认值
+                    comboBox.setCurrentIndex(0)
+                
+                # 创建布局
                 hboxLayout = QHBoxLayout()
                 hboxLayout.addWidget(comboBox)
                 hboxLayout.setContentsMargins(2, 2, 2, 2)
-            comboBox.index = [index.row(), index.column()]
+                containerWidget.setLayout(hboxLayout)
-            widget = QWidget()
+                
-            widget.setStyleSheet("QComboBox { background-color: transparent; }")
+                # 设置索引widget
-            widget.setLayout(hboxLayout)
+                self.parent().setIndexWidget(index, containerWidget)
-            self.parent().setIndexWidget(index, widget)
                 self.parent().openPersistentEditor(index)
                 
+                # 保存comboBox引用到委托对象，以便refreshComboBox能够找到它
+                setattr(self, comBox, comboBox)
+                
+            except Exception as e:
+                # 捕获异常，确保paint方法不会崩溃
+                print(f"创建comboBox时出错 (行 {index.row()}, 列 {index.column()}): {e}")
+                pass
+
     def indexChange(self):
         sender = self.sender()
         modbusType = self.parent().modbusType