refactor(gui): 提取窗口居中逻辑至 CenterOnParentMixin，消除5处重复 showEvent

src/gui/ALConfigWidget.py

@@ -42,6 +42,7 @@ from gui.ALUserTreeWidget import (
     ALUserTreeWidget
 )
 from gui.ALWebDriverDownloadDialog import ALWebDriverDownloadDialog
+from gui.ALWidgetMixin import CenterOnParentMixin
 from gui.resources.ui.Ui_ALConfigWidget import Ui_ALConfigWidget
 from interfaces.ConfigProvider import (
     CfgKey,
@@ -52,7 +53,7 @@ from utils.JSONReader import JSONReader
 from utils.JSONWriter import JSONWriter
 
 
-class ALConfigWidget(QWidget, Ui_ALConfigWidget):
+class ALConfigWidget(CenterOnParentMixin, QWidget, Ui_ALConfigWidget):
 
     configWidgetIsClosed = Signal()
 
@@ -110,29 +111,6 @@ class ALConfigWidget(QWidget, Ui_ALConfigWidget):
         self.ConfirmButton.clicked.connect(self.onConfirmButtonClicked)
         self.CancelButton.clicked.connect(self.onCancelButtonClicked)
 
-    def showEvent(
-        self,
-        event
-    ):
-
-        result = super().showEvent(event)
-
-        screen_rect = self.screen().geometry()
-        target_pos = self.parent().geometry().center()
-        target_pos.setX(target_pos.x() - self.width()//2)
-        target_pos.setY(target_pos.y() - self.height()//2)
-        if target_pos.x() < 0:
-            target_pos.setX(0)
-        if target_pos.x() + self.width() > screen_rect.width():
-            target_pos.setX(screen_rect.width() - self.width())
-        if target_pos.y() < 0:
-            target_pos.setY(0)
-        if target_pos.y() + self.height() > screen_rect.height():
-            target_pos.setY(screen_rect.height() - self.height())
-        self.move(target_pos)
-
-        return result
-
     def closeEvent(
         self,
         event: QCloseEvent

src/gui/ALSeatMapSelectDialog.py

@@ -24,9 +24,9 @@ from PySide6.QtWidgets import (
 )
 
 from gui.ALSeatMapView import ALSeatMapView
+from gui.ALWidgetMixin import CenterOnParentMixin
 
-
-class ALSeatMapSelectDialog(QDialog):
+class ALSeatMapSelectDialog(CenterOnParentMixin, QDialog):
 
     seatMapSelectDialogIsClosed = Signal(list)
 
@@ -96,29 +96,6 @@ class ALSeatMapSelectDialog(QDialog):
         self.ConfirmButton.clicked.connect(self.onConfirmButtonClicked)
         self.CancelButton.clicked.connect(self.onCancelButtonClicked)
 
-    def showEvent(
-        self,
-        event
-    ):
-
-        result = super().showEvent(event)
-
-        screen_rect = self.screen().geometry()
-        target_pos = self.parent().geometry().center()
-        target_pos.setX(target_pos.x() - self.width()//2)
-        target_pos.setY(target_pos.y() - self.height()//2)
-        if target_pos.x() < 0:
-            target_pos.setX(0)
-        if target_pos.x() + self.width() > screen_rect.width():
-            target_pos.setX(screen_rect.width() - self.width())
-        if target_pos.y() < 0:
-            target_pos.setY(0)
-        if target_pos.y() + self.height() > screen_rect.height():
-            target_pos.setY(screen_rect.height() - self.height())
-        self.move(target_pos)
-
-        return result
-
     def closeEvent(
         self,
         event: QCloseEvent

src/gui/ALSettingsWidget.py

@@ -19,8 +19,7 @@ from PySide6.QtCore import (
     Slot
 )
 from PySide6.QtGui import (
-    QCloseEvent,
-    QShowEvent
+    QCloseEvent
 )
 from PySide6.QtWidgets import (
     QApplication,
@@ -38,6 +37,7 @@ from managers.theme.ThemeManager import(
     instance as themeInstance
 )
 
+from gui.ALWidgetMixin import CenterOnParentMixin
 from gui.resources.ui.Ui_ALSettingsWidget import Ui_ALSettingsWidget
 from interfaces.ConfigProvider import (
     CfgKey,
@@ -83,7 +83,7 @@ def _restartApp(
     QProcess.startDetached(sys.executable, sys.argv)
 
 
-class ALSettingsWidget(QWidget, Ui_ALSettingsWidget):
+class ALSettingsWidget(CenterOnParentMixin, QWidget, Ui_ALSettingsWidget):
 
     settingsWidgetIsClosed = Signal()
 
@@ -102,6 +102,14 @@ class ALSettingsWidget(QWidget, Ui_ALSettingsWidget):
         self.connectSignals()
         self.loadSettings()
 
+    def closeEvent(
+        self,
+        event: QCloseEvent
+    ):
+
+        self.settingsWidgetIsClosed.emit()
+        super().closeEvent(event)
+
     def modifyUi(
         self
     ):
@@ -153,35 +161,6 @@ class ALSettingsWidget(QWidget, Ui_ALSettingsWidget):
         self.ApplyButton.clicked.connect(self.onApplyButtonClicked)
         self.ConfirmButton.clicked.connect(self.onConfirmButtonClicked)
 
-    def showEvent(
-        self,
-        event: QShowEvent
-    ):
-
-        result = super().showEvent(event)
-        screen_rect = self.screen().geometry()
-        target_pos = self.parent().geometry().center()
-        target_pos.setX(target_pos.x() - self.width()//2)
-        target_pos.setY(target_pos.y() - self.height()//2)
-        if target_pos.x() < 0:
-            target_pos.setX(0)
-        if target_pos.x() + self.width() > screen_rect.width():
-            target_pos.setX(screen_rect.width() - self.width())
-        if target_pos.y() < 0:
-            target_pos.setY(0)
-        if target_pos.y() + self.height() > screen_rect.height():
-            target_pos.setY(screen_rect.height() - self.height())
-        self.move(target_pos)
-        return result
-
-    def closeEvent(
-        self,
-        event: QCloseEvent
-    ):
-
-        self.settingsWidgetIsClosed.emit()
-        super().closeEvent(event)
-
     def loadSettings(
         self
     ):

src/gui/ALTimerTaskManageWidget.py

@@ -43,6 +43,7 @@ from gui.ALTimerTaskAddDialog import (
     ALTimerTaskStatus
 )
 from gui.ALTimerTaskHistoryDialog import ALTimerTaskHistoryDialog
+from gui.ALWidgetMixin import CenterOnParentMixin
 from gui.resources.ui.Ui_ALTimerTaskManageWidget import Ui_ALTimerTaskManageWidget
 from interfaces.ConfigProvider import (
     CfgKey,
@@ -189,7 +190,7 @@ class ALTimerTaskItemWidget(QWidget):
         Menu.exec(self.mapToGlobal(pos))
 
 
-class ALTimerTaskManageWidget(QWidget, Ui_ALTimerTaskManageWidget):
+class ALTimerTaskManageWidget(CenterOnParentMixin, QWidget, Ui_ALTimerTaskManageWidget):
 
     class SortPolicy(Enum):
 
@@ -299,29 +300,6 @@ class ALTimerTaskManageWidget(QWidget, Ui_ALTimerTaskManageWidget):
             )
             return False
 
-    def showEvent(
-        self,
-        event
-    ):
-
-        result = super().showEvent(event)
-
-        screen_rect = self.screen().geometry()
-        target_pos = self.parent().geometry().center()
-        target_pos.setX(target_pos.x() - self.width()//2)
-        target_pos.setY(target_pos.y() - self.height()//2)
-        if target_pos.x() < 0:
-            target_pos.setX(0)
-        if target_pos.x() + self.width() > screen_rect.width():
-            target_pos.setX(screen_rect.width() - self.width())
-        if target_pos.y() < 0:
-            target_pos.setY(0)
-        if target_pos.y() + self.height() > screen_rect.height():
-            target_pos.setY(screen_rect.height() - self.height())
-        self.move(target_pos)
-
-        return result
-
     def closeEvent(
         self,
         event: QCloseEvent

src/gui/ALWebDriverDownloadDialog.py

@@ -38,6 +38,7 @@ from managers.driver.WebDriverManager import (
     WebDriverStatus
 )
 from gui.ALStatusLabel import ALStatusLabel
+from gui.ALWidgetMixin import CenterOnParentMixin
 
 
 class DownloadWorker(QThread):
@@ -123,7 +124,7 @@ class DownloadWorker(QThread):
                 self.wait()
 
 
-class ALWebDriverDownloadDialog(QDialog):
+class ALWebDriverDownloadDialog(CenterOnParentMixin, QDialog):
 
     def __init__(
         self,
@@ -152,28 +153,6 @@ class ALWebDriverDownloadDialog(QDialog):
         self.initializeDriverManager()
         self.refreshDriverList()
 
-    def showEvent(
-        self,
-        event
-    ):
-
-        result = super().showEvent(event)
-        if self.parent():
-            screen_rect = self.screen().geometry()
-            target_pos = self.parent().geometry().center()
-            target_pos.setX(target_pos.x() - self.width()//2)
-            target_pos.setY(target_pos.y() - self.height()//2)
-            if target_pos.x() < 0:
-                target_pos.setX(0)
-            if target_pos.x() + self.width() > screen_rect.width():
-                target_pos.setX(screen_rect.width() - self.width())
-            if target_pos.y() < 0:
-                target_pos.setY(0)
-            if target_pos.y() + self.height() > screen_rect.height():
-                target_pos.setY(screen_rect.height() - self.height())
-            self.move(target_pos)
-        return result
-
     def setupUi(
         self
     ):

src/gui/ALWidgetMixin.py

@@ -0,0 +1,49 @@
+# -*- coding: utf-8 -*-
+"""
+Copyright (c) 2026 KenanZhu.
+All rights reserved.
+
+This software is provided "as is", without any warranty of any kind.
+You may use, modify, and distribute this file under the terms of the MIT License.
+See the LICENSE file for details.
+"""
+from PySide6.QtGui import QShowEvent
+
+
+class CenterOnParentMixin:
+    """
+        Mixin that centres the widget relative to its parent on first show,
+        clamping the position to the screen bounds.
+
+        Usage::
+
+            class MyWidget(CenterOnParentMixin, QWidget, Ui_MyWidget):
+                pass
+
+            class MyDialog(CenterOnParentMixin, QDialog):
+                pass
+
+        The mixin must appear **before** QWidget / QDialog in the base list
+        so that ``super().showEvent(event)`` resolves up the MRO correctly.
+    """
+
+    def showEvent(
+        self,
+        event: QShowEvent
+    ):
+
+        super().showEvent(event)
+        if self.parent():
+            screen_rect = self.screen().geometry()
+            target_pos = self.parent().geometry().center()
+            target_pos.setX(target_pos.x() - self.width() // 2)
+            target_pos.setY(target_pos.y() - self.height() // 2)
+            if target_pos.x() < 0:
+                target_pos.setX(0)
+            if target_pos.x() + self.width() > screen_rect.width():
+                target_pos.setX(screen_rect.width() - self.width())
+            if target_pos.y() < 0:
+                target_pos.setY(0)
+            if target_pos.y() + self.height() > screen_rect.height():
+                target_pos.setY(screen_rect.height() - self.height())
+            self.move(target_pos)