From 732f104c5cfa98b813a23b0c68af4702157821af Mon Sep 17 00:00:00 2001
From: KenanZhu <3471685733@qq.com>
Date: Sat, 30 May 2026 21:37:15 +0800
Subject: [PATCH] =?UTF-8?q?refactor(gui):=20=E9=87=8D=E5=91=BD=E5=90=8D=20?=
 =?UTF-8?q?=5FapplyThemeByName=20=E2=86=92=20=5FapplyCustomTheme=EF=BC=8C?=
 =?UTF-8?q?=5FclearQss=20=E2=86=92=20=5FclearCustomTheme?=
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Content-Type: text/plain; charset=UTF-8
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- _clearCustomTheme(theme) 清除 QSS 后切换到指定默认主题
- _applyCustomTheme(name, fallback_theme) 应用自定义主题，失败时回退到 fallback_theme
- saveAndApply 调用处传入当前 radio 主题作为 fallback
---
 src/gui/ALSettingsWidget.py | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/src/gui/ALSettingsWidget.py b/src/gui/ALSettingsWidget.py
index 5ca3e91..2ce9db2 100644
--- a/src/gui/ALSettingsWidget.py
+++ b/src/gui/ALSettingsWidget.py
@@ -50,24 +50,27 @@ def _setActiveStyleName(
     global _active_style_name
     _active_style_name = name
 
-def _clearQss(
+def _clearCustomTheme(
+    theme: str
 ):
 
     app : QApplication | None = QApplication.instance()
     if app:
         app.setStyleSheet("")
+    _applyTheme(theme)
 
-def _applyThemeByName(
-    name: str
+def _applyCustomTheme(
+    name: str,
+    fallback_theme: str = "system"
 ):
 
     if not name:
-        _clearQss()
+        _clearCustomTheme(fallback_theme)
         return
     try:
         themeInstance().applyTheme(name)
     except Exception:
-        _clearQss()
+        _clearCustomTheme(fallback_theme)
 
 def _applyTheme(
     theme: str
@@ -274,7 +277,7 @@ class ALSettingsWidget(QWidget, Ui_ALSettingsWidget):
         self.__cfg_mgr.set(CfgKey.GLOBAL.APPEARANCE.THEME, theme)
         self.__cfg_mgr.set(CfgKey.GLOBAL.APPEARANCE.STYLE, style)
         self.__cfg_mgr.set(CfgKey.GLOBAL.APPEARANCE.CUSTOM_THEME, custom_theme)
-        _applyThemeByName(custom_theme)
+        _applyCustomTheme(custom_theme, theme)
         self._syncRadioFromNeedTheme(custom_theme)
         theme, _, _ = self.collectSettings()
         _applyTheme(theme)