add:issue #224

Ink Canvas/App.xaml.cs

@@ -35,7 +35,7 @@ namespace Ink_Canvas
         public static string RootPath = Environment.GetEnvironmentVariable("APPDATA") + "\\Ink Canvas\\";
         
         // 新增：标记是否通过--board参数启动
-        public static bool StartWithBoardMode = false;
+        public static bool StartWithBoardMode;
         // 新增：保存看门狗进程对象
         private static Process watchdogProcess;
         // 新增：标记是否为软件内主动退出

Ink Canvas/Helpers/FloatingWindowInterceptor.cs

@@ -229,7 +229,7 @@ namespace Ink_Canvas.Helpers
         private readonly Dictionary<IntPtr, DateTime> _lastScanTime = new Dictionary<IntPtr, DateTime>();
         private readonly HashSet<IntPtr> _knownWindows = new HashSet<IntPtr>();
         private readonly Dictionary<string, DateTime> _processLastScanTime = new Dictionary<string, DateTime>();
-        private int _consecutiveEmptyScans = 0;
+        private int _consecutiveEmptyScans;
         private DateTime _lastSuccessfulScan = DateTime.Now;
         private readonly object _scanLock = new object();
 

Ink Canvas/Helpers/GlobalHotkeyManager.cs

@@ -24,12 +24,12 @@ namespace Ink_Canvas.Helpers
         
         // 多屏幕支持相关字段
         private Screen _currentScreen;
-        private bool _isMultiScreenMode = false;
+        private bool _isMultiScreenMode;
         private bool _enableScreenSpecificHotkeys = true; // 是否启用基于屏幕的热键注册
         
         // 智能热键管理相关字段
-        private bool _isWindowFocused = false;
+        private bool _isWindowFocused;
-        private bool _isMouseOverWindow = false;
+        private bool _isMouseOverWindow;
         private System.Windows.Threading.DispatcherTimer _mousePositionTimer;
 
         // 配置文件路径

Ink Canvas/Helpers/MultiTouchInput.cs

@@ -30,7 +30,7 @@ namespace Ink_Canvas.Helpers
     public class StrokeVisual : DrawingVisual
     {
         private bool _needsRedraw = true;
-        private int _lastPointCount = 0;
+        private int _lastPointCount;
         private const int REDRAW_THRESHOLD = 3; 
 
         /// <summary>

Ink Canvas/Helpers/PPTInkManager.cs

@@ -37,7 +37,7 @@ namespace Ink_Canvas.Helpers
         private const int MinSwitchIntervalMs = 100; // 最小切换间隔100毫秒
         
         // 内存管理相关字段
-        private long _totalMemoryUsage = 0;
+        private long _totalMemoryUsage;
         private const long MaxMemoryUsageBytes = 100 * 1024 * 1024; // 100MB限制
         private DateTime _lastMemoryCleanup = DateTime.MinValue;
         private const int MemoryCleanupIntervalMinutes = 5; // 5分钟清理一次

Ink Canvas/MainWindow.xaml

@@ -3242,6 +3242,39 @@
                                                    FontFamily="Consolas"
                                                    Text="{Binding ElementName=RandWindowOnceMaxStudentsSlider, Path=Value, Converter={StaticResource IntNumberToString}}" />
                                     </ui:SimpleStackPanel>
+                                    <Line HorizontalAlignment="Center" X1="0" Y1="0" X2="400" Y2="0"
+                                          Stroke="#3f3f46" StrokeThickness="1" Margin="0,4,0,4" />
+                                    <TextBlock Foreground="#fafafa" Text="计时器设置" 
+                                               FontSize="16" FontWeight="Bold" Margin="0,10,0,5" />
+                                    <ui:SimpleStackPanel Orientation="Horizontal" HorizontalAlignment="Left">
+                                        <TextBlock Foreground="#fafafa" Text="使用老版计时器按钮UI"
+                                                   VerticalAlignment="Center" FontSize="14" Margin="0,0,16,0" />
+                                        <ui:ToggleSwitch OnContent="" OffContent=""
+                                                         Name="ToggleSwitchUseLegacyTimerUI"
+                                                         IsOn="False" FontFamily="Microsoft YaHei UI" 
+                                                         FontWeight="Bold" 
+                                                         Toggled="ToggleSwitchUseLegacyTimerUI_Toggled" />
+                                    </ui:SimpleStackPanel>
+                                    <ui:SimpleStackPanel Orientation="Horizontal" HorizontalAlignment="Left">
+                                        <TextBlock Foreground="#fafafa" Text="计时器提醒音量" VerticalAlignment="Center"
+                                                   FontSize="14" Margin="0,0,16,0" />
+                                        <Slider x:Name="TimerVolumeSlider" Minimum="0"
+                                                Maximum="1" Width="168" FontFamily="Microsoft YaHei UI"
+                                                ValueChanged="TimerVolumeSlider_ValueChanged"
+                                                FontSize="20" IsSnapToTickEnabled="True" Value="1" TickFrequency="0.1"
+                                                TickPlacement="None" AutoToolTipPlacement="None" />
+                                        <TextBlock VerticalAlignment="Center" Margin="12,0,16,0" FontSize="14"
+                                                   FontFamily="Consolas"
+                                                   Text="{Binding ElementName=TimerVolumeSlider, Path=Value, StringFormat={}{0:P0}}" />
+                                    </ui:SimpleStackPanel>
+                                    <ui:SimpleStackPanel Orientation="Horizontal" HorizontalAlignment="Left" Margin="0,5,0,0">
+                                        <TextBlock Foreground="#fafafa" Text="自定义提醒铃声：" VerticalAlignment="Center"
+                                                   FontSize="14" Margin="0,0,16,0" />
+                                        <Button Name="ButtonSelectCustomTimerSound" Content="选择文件" FontFamily="Microsoft YaHei UI" 
+                                                Click="ButtonSelectCustomTimerSound_Click" Padding="10,3"/>
+                                        <Button Name="ButtonResetTimerSound" Content="重置" FontFamily="Microsoft YaHei UI" 
+                                                Click="ButtonResetTimerSound_Click" Padding="10,3" Margin="5,0,0,0"/>
+                                    </ui:SimpleStackPanel>
                                 </ui:SimpleStackPanel>
                             </GroupBox>
                             <GroupBox>

Ink Canvas/MainWindow_cs/MW_ElementsControls.cs

@@ -1493,7 +1493,7 @@ namespace Ink_Canvas
         #region Image Resize Handles
 
         // 图片缩放选择点相关变量
-        private bool isResizingImage = false;
+        private bool isResizingImage;
         private Point imageResizeStartPoint;
         private string activeResizeHandle = "";
 

Ink Canvas/MainWindow_cs/MW_Eraser.cs

@@ -13,14 +13,14 @@ namespace Ink_Canvas
     public partial class MainWindow : Window
     {
         // 橡皮擦系统核心变量
-        public bool isUsingGeometryEraser = false;
+        public bool isUsingGeometryEraser;
-        private IncrementalStrokeHitTester hitTester = null;
+        private IncrementalStrokeHitTester hitTester;
 
         public double eraserWidth = 64;
-        public bool isEraserCircleShape = false;
+        public bool isEraserCircleShape;
-        public bool isUsingStrokesEraser = false;
+        public bool isUsingStrokesEraser;
 
-        private Matrix scaleMatrix = new Matrix();
+        private Matrix scaleMatrix;
 
         // 橡皮擦覆盖层相关控件
         private System.Windows.Controls.Canvas eraserOverlayCanvas;

Ink Canvas/MainWindow_cs/MW_PPT.cs

@@ -91,8 +91,8 @@ namespace Ink_Canvas
         private const int ProcessMonitorInterval = 1000; // 应用程序监控间隔（毫秒）
         
         // 上次播放位置相关字段
-        private int _lastPlaybackPage = 0;
+        private int _lastPlaybackPage;
-        private bool _shouldNavigateToLastPage = false;
+        private bool _shouldNavigateToLastPage;
         
         // 页面切换防抖机制
         private DateTime _lastSlideSwitchTime = DateTime.MinValue;

Ink Canvas/MainWindow_cs/MW_SelectionGestures.cs

@@ -255,12 +255,12 @@ namespace Ink_Canvas
         #endregion
 
         private bool isGridInkCanvasSelectionCoverMouseDown;
-        private bool isStrokeDragging = false;
+        private bool isStrokeDragging;
         private Point strokeDragStartPoint;
         private StrokeCollection StrokesSelectionClone = new StrokeCollection();
 
         // 选择框和选择点相关变量
-        private bool isResizing = false;
+        private bool isResizing;
         private string currentResizeHandle = "";
         private Point resizeStartPoint;
         private Rect originalSelectionBounds;

Ink Canvas/MainWindow_cs/MW_Settings.cs

@@ -2516,6 +2516,44 @@ namespace Ink_Canvas
             SaveSettingsToFile();
         }
 
+        private void ToggleSwitchUseLegacyTimerUI_Toggled(object sender, RoutedEventArgs e)
+        {
+            if (!isLoaded) return;
+            Settings.RandSettings.UseLegacyTimerUI = ToggleSwitchUseLegacyTimerUI.IsOn;
+            SaveSettingsToFile();
+        }
+
+        private void TimerVolumeSlider_ValueChanged(object sender, RoutedEventArgs e)
+        {
+            if (!isLoaded) return;
+            Settings.RandSettings.TimerVolume = TimerVolumeSlider.Value;
+            SaveSettingsToFile();
+        }
+
+        private void ButtonSelectCustomTimerSound_Click(object sender, RoutedEventArgs e)
+        {
+            Microsoft.Win32.OpenFileDialog openFileDialog = new Microsoft.Win32.OpenFileDialog
+            {
+                Title = "选择计时器提醒铃声",
+                Filter = "音频文件 (*.wav)|*.wav|所有文件 (*.*)|*.*",
+                DefaultExt = "wav"
+            };
+
+            if (openFileDialog.ShowDialog() == true)
+            {
+                Settings.RandSettings.CustomTimerSoundPath = openFileDialog.FileName;
+                SaveSettingsToFile();
+                MessageBox.Show("自定义铃声设置成功！", "设置成功", MessageBoxButton.OK, MessageBoxImage.Information);
+            }
+        }
+
+        private void ButtonResetTimerSound_Click(object sender, RoutedEventArgs e)
+        {
+            Settings.RandSettings.CustomTimerSoundPath = "";
+            SaveSettingsToFile();
+            MessageBox.Show("已重置为默认铃声！", "重置成功", MessageBoxButton.OK, MessageBoxImage.Information);
+        }
+
         private void ToggleSwitchShowRandomAndSingleDraw_Toggled(object sender, RoutedEventArgs e)
         {
             if (!isLoaded) return;

Ink Canvas/MainWindow_cs/MW_SettingsToLoad.cs

@@ -856,6 +856,10 @@ namespace Ink_Canvas
                 RandomDrawPanel.Visibility = Settings.RandSettings.ShowRandomAndSingleDraw ? Visibility.Visible : Visibility.Collapsed;
                 SingleDrawPanel.Visibility = Settings.RandSettings.ShowRandomAndSingleDraw ? Visibility.Visible : Visibility.Collapsed;
 
+                // 计时器设置
+                ToggleSwitchUseLegacyTimerUI.IsOn = Settings.RandSettings.UseLegacyTimerUI;
+                TimerVolumeSlider.Value = Settings.RandSettings.TimerVolume;
+
                 // 加载自定义点名背景
                 UpdatePickNameBackgroundsInComboBox();
 
@@ -874,6 +878,8 @@ namespace Ink_Canvas
                 RandWindowOnceMaxStudentsSlider.Value = Settings.RandSettings.RandWindowOnceMaxStudents;
                 ToggleSwitchExternalCaller.IsOn = Settings.RandSettings.DirectCallCiRand;
                 ComboBoxExternalCallerType.SelectedIndex = Settings.RandSettings.ExternalCallerType;
+                ToggleSwitchUseLegacyTimerUI.IsOn = Settings.RandSettings.UseLegacyTimerUI;
+                TimerVolumeSlider.Value = Settings.RandSettings.TimerVolume;
             }
 
             // ModeSettings

Ink Canvas/MainWindow_cs/MW_Timer.cs

@@ -71,10 +71,10 @@ namespace Ink_Canvas
         private DateTime cachedNetworkTime = DateTime.Now;
         private DateTime lastNtpSyncTime = DateTime.MinValue;
         private string lastDisplayedTime = ""; 
-        private bool useNetworkTime = false; 
+        private bool useNetworkTime; 
         private TimeSpan networkTimeOffset = TimeSpan.Zero;
         private DateTime lastLocalTime = DateTime.Now; // 记录上次的本地时间，用于检测时间跳跃
-        private bool isNtpSyncing = false; // 防止重复NTP同步的标志 
+        private bool isNtpSyncing; // 防止重复NTP同步的标志 
 
         private async Task<DateTime> GetNetworkTimeAsync()
         {

Ink Canvas/MainWindow_cs/MW_TouchEvents.cs

@@ -24,8 +24,7 @@ namespace Ink_Canvas
         private InkCanvasEditingMode lastInkCanvasEditingMode = InkCanvasEditingMode.Ink;
         private DateTime lastTouchDownTime = DateTime.MinValue;
         private const double MULTI_TOUCH_DELAY_MS = 100; 
-        private bool isInWritingMode = false;
+        private bool isMultiTouchTimerActive;
-        private bool isMultiTouchTimerActive = false;
         
         /// </summary> 
         /// 保存画布上的非笔画元素（如图片、媒体元素等）

Ink Canvas/Resources/Settings.cs

@@ -91,7 +91,7 @@ namespace Ink_Canvas
         [JsonProperty("enablePalmEraser")]
         public bool EnablePalmEraser { get; set; } = true;
         [JsonProperty("palmEraserSensitivity")]
-        public int PalmEraserSensitivity { get; set; } = 0; // 0-低敏感度, 1-中敏感度, 2-高敏感度
+        public int PalmEraserSensitivity { get; set; } // 0-低敏感度, 1-中敏感度, 2-高敏感度
         [JsonProperty("clearCanvasAlsoClearImages")]
         public bool ClearCanvasAlsoClearImages { get; set; } = true;
         [JsonProperty("showCircleCenter")]
@@ -99,7 +99,7 @@ namespace Ink_Canvas
 
         // 墨迹渐隐功能设置
         [JsonProperty("enableInkFade")]
-        public bool EnableInkFade { get; set; } = false; 
+        public bool EnableInkFade { get; set; } 
         [JsonProperty("inkFadeTime")]
         public int InkFadeTime { get; set; } = 3000; // 墨迹渐隐时间（毫秒）
 
@@ -236,7 +236,7 @@ namespace Ink_Canvas
         public int QuickColorPaletteDisplayMode { get; set; } = 1;
 
         [JsonProperty("enableHotkeysInMouseMode")]
-        public bool EnableHotkeysInMouseMode { get; set; } = false;
+        public bool EnableHotkeysInMouseMode { get; set; }
 
     }
 
@@ -310,9 +310,9 @@ namespace Ink_Canvas
         [JsonProperty("isAlwaysGoToFirstPageOnReenter")]
         public bool IsAlwaysGoToFirstPageOnReenter { get; set; }
         [JsonProperty("enablePowerPointEnhancement")]
-        public bool EnablePowerPointEnhancement { get; set; } = false;
+        public bool EnablePowerPointEnhancement { get; set; }
         [JsonProperty("showGestureButtonInSlideShow")]
-        public bool ShowGestureButtonInSlideShow { get; set; } = false;
+        public bool ShowGestureButtonInSlideShow { get; set; }
     }
 
     public class Automation
@@ -452,7 +452,7 @@ namespace Ink_Canvas
         public int AutoDelSavedFilesDaysThreshold = 15;
 
         [JsonProperty("keepFoldAfterSoftwareExit")]
-        public bool KeepFoldAfterSoftwareExit { get; set; } = false;
+        public bool KeepFoldAfterSoftwareExit { get; set; }
 
         [JsonProperty("isSaveFullPageStrokes")]
         public bool IsSaveFullPageStrokes;
@@ -467,13 +467,13 @@ namespace Ink_Canvas
     public class FloatingWindowInterceptorSettings
     {
         [JsonProperty("isEnabled")]
-        public bool IsEnabled { get; set; } = false;
+        public bool IsEnabled { get; set; }
 
         [JsonProperty("scanIntervalMs")]
         public int ScanIntervalMs { get; set; } = 5000; 
 
         [JsonProperty("autoStart")]
-        public bool AutoStart { get; set; } = false;
+        public bool AutoStart { get; set; }
 
         [JsonProperty("showNotifications")]
         public bool ShowNotifications { get; set; } = true;
@@ -622,11 +622,17 @@ namespace Ink_Canvas
         [JsonProperty("directCallCiRand")]
         public bool DirectCallCiRand { get; set; }
         [JsonProperty("externalCallerType")]
-        public int ExternalCallerType { get; set; } = 0; 
+        public int ExternalCallerType { get; set; } 
         [JsonProperty("selectedBackgroundIndex")]
         public int SelectedBackgroundIndex { get; set; }
         [JsonProperty("customPickNameBackgrounds")]
         public List<CustomPickNameBackground> CustomPickNameBackgrounds { get; set; } = new List<CustomPickNameBackground>();
+        [JsonProperty("useLegacyTimerUI")]
+        public bool UseLegacyTimerUI { get; set; }
+        [JsonProperty("timerVolume")]
+        public double TimerVolume { get; set; } = 1.0;
+        [JsonProperty("customTimerSoundPath")]
+        public string CustomTimerSoundPath { get; set; } = "";
     }
 
     public class CustomPickNameBackground
@@ -668,6 +674,6 @@ namespace Ink_Canvas
     public class ModeSettings
     {
         [JsonProperty("isPPTOnlyMode")]
-        public bool IsPPTOnlyMode { get; set; } = false; // 是否为仅PPT模式，默认为false（正常模式）
+        public bool IsPPTOnlyMode { get; set; } // 是否为仅PPT模式，默认为false（正常模式）
     }
 }

Ink Canvas/Windows/CountdownTimerWindow.xaml

@@ -44,18 +44,18 @@
                         <Grid Name="GridAdjustHour" Visibility="Visible" Margin="-29,-30,0,-30" Width="29">
                             <ui:SimpleStackPanel Spacing="2">
                                 <Button Height="13" Width="{Binding ElementName=GridAdjustHour, Path=ActualWidth}" Click="Button_Click_1">
-                                    <TextBlock Text="∧∧" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
+                                    <TextBlock x:Name="HourPlus5Text" Text="∧∧" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
                                 </Button>
                                 <Button Height="13" Width="{Binding ElementName=GridAdjustHour, Path=ActualWidth}" Click="Button_Click">
-                                    <TextBlock Text="∧" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
+                                    <TextBlock x:Name="HourPlus1Text" Text="∧" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
                                 </Button>
                             </ui:SimpleStackPanel>
                             <ui:SimpleStackPanel Spacing="2" VerticalAlignment="Bottom">
                                 <Button  Height="13" Width="{Binding ElementName=GridAdjustHour, Path=ActualWidth}" Click="Button_Click_2">
-                                    <TextBlock Text="∨" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
+                                    <TextBlock x:Name="HourMinus1Text" Text="∨" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
                                 </Button>
                                 <Button Height="13" Width="{Binding ElementName=GridAdjustHour, Path=ActualWidth}" Click="Button_Click_3">
-                                    <TextBlock Text="∨∨" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
+                                    <TextBlock x:Name="HourMinus5Text" Text="∨∨" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
                                 </Button>
                             </ui:SimpleStackPanel>
                         </Grid>
@@ -91,18 +91,18 @@
                         <Grid Visibility="{Binding ElementName=GridAdjustHour, Path=Visibility}" Margin="-29,-30,0,-30" Width="29">
                             <ui:SimpleStackPanel Spacing="2">
                                 <Button Height="13" Width="{Binding ElementName=GridAdjustHour, Path=ActualWidth}" Click="Button_Click_5">
-                                    <TextBlock Text="∧∧" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
+                                    <TextBlock x:Name="MinutePlus5Text" Text="∧∧" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
                                 </Button>
                                 <Button Height="13" Width="{Binding ElementName=GridAdjustHour, Path=ActualWidth}" Click="Button_Click_4">
-                                    <TextBlock Text="∧" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
+                                    <TextBlock x:Name="MinutePlus1Text" Text="∧" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
                                 </Button>
                             </ui:SimpleStackPanel>
                             <ui:SimpleStackPanel Spacing="2" VerticalAlignment="Bottom">
                                 <Button Height="13" Width="{Binding ElementName=GridAdjustHour, Path=ActualWidth}" Click="Button_Click_6">
-                                    <TextBlock Text="∨" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
+                                    <TextBlock x:Name="MinuteMinus1Text" Text="∨" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
                                 </Button>
                                 <Button Height="13" Width="{Binding ElementName=GridAdjustHour, Path=ActualWidth}" Click="Button_Click_7">
-                                    <TextBlock Text="∨∨" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
+                                    <TextBlock x:Name="MinuteMinus5Text" Text="∨∨" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
                                 </Button>
                             </ui:SimpleStackPanel>
                             <Border x:Name="BtnTimeSetOkay" MouseUp="Grid_MouseUp"
@@ -151,18 +151,18 @@
                         <Grid Visibility="{Binding ElementName=GridAdjustHour, Path=Visibility}" Margin="-29,-30,0,-30" Width="29">
                             <ui:SimpleStackPanel Spacing="2">
                                 <Button Height="13" Width="{Binding ElementName=GridAdjustHour, Path=ActualWidth}" Click="Button_Click_8">
-                                    <TextBlock Text="∧∧" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
+                                    <TextBlock x:Name="SecondPlus5Text" Text="∧∧" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
                                 </Button>
                                 <Button Height="13" Width="{Binding ElementName=GridAdjustHour, Path=ActualWidth}" Click="Button_Click_9">
-                                    <TextBlock Text="∧" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
+                                    <TextBlock x:Name="SecondPlus1Text" Text="∧" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
                                 </Button>
                             </ui:SimpleStackPanel>
                             <ui:SimpleStackPanel Spacing="2" VerticalAlignment="Bottom">
                                 <Button Height="13" Width="{Binding ElementName=GridAdjustHour, Path=ActualWidth}" Click="Button_Click_10">
-                                    <TextBlock Text="∨" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
+                                    <TextBlock x:Name="SecondMinus1Text" Text="∨" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
                                 </Button>
                                 <Button Height="13" Width="{Binding ElementName=GridAdjustHour, Path=ActualWidth}" Click="Button_Click_11">
-                                    <TextBlock Text="∨∨" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
+                                    <TextBlock x:Name="SecondMinus5Text" Text="∨∨" Margin="-10" FontSize="8" HorizontalAlignment="Center" VerticalAlignment="Center"/>
                                 </Button>
                             </ui:SimpleStackPanel>
                         </Grid>

Ink Canvas/Windows/CountdownTimerWindow.xaml.cs

@@ -1,4 +1,5 @@
 using Ink_Canvas.Helpers;
+using Ink_Canvas.Resources;
 using System;
 using System.Media;
 using System.Timers;
@@ -6,6 +7,7 @@ using System.Windows;
 using System.Windows.Input;
 using System.Windows.Interop;
 using System.Windows.Media;
+using System.Windows.Media.Imaging;
 
 namespace Ink_Canvas
 {
@@ -21,6 +23,7 @@ namespace Ink_Canvas
 
             timer.Elapsed += Timer_Elapsed;
             timer.Interval = 50;
+            InitializeUI();
         }
 
         private void Timer_Elapsed(object sender, ElapsedEventArgs e)
@@ -62,24 +65,25 @@ namespace Ink_Canvas
                 Application.Current.Dispatcher.Invoke(() =>
                 {
                     //Play sound
-                    player.Stream = Properties.Resources.TimerDownNotice;
+                    PlayTimerSound();
-                    player.Play();
                 });
             }
         }
 
         SoundPlayer player = new SoundPlayer();
+        MediaPlayer mediaPlayer = new MediaPlayer();
 
-        int hour = 0;
+        int hour;
         int minute = 1;
-        int second = 0;
+        int second;
         int totalSeconds = 60;
 
         DateTime startTime = DateTime.Now;
         DateTime pauseTime = DateTime.Now;
 
-        bool isTimerRunning = false;
+        bool isTimerRunning;
-        bool isPaused = false;
+        bool isPaused;
+        bool useLegacyUI;
 
         Timer timer = new Timer();
 
@@ -334,6 +338,97 @@ namespace Ink_Canvas
             }
         }
 
+        private void InitializeUI()
+        {
+            // 从设置中读取配置
+            if (MainWindow.Settings.RandSettings != null)
+            {
+                useLegacyUI = MainWindow.Settings.RandSettings.UseLegacyTimerUI;
+                UpdateButtonTexts();
+            }
+        }
+
+        public void RefreshUI()
+        {
+            InitializeUI();
+        }
+
+        private void UpdateButtonTexts()
+        {
+            if (useLegacyUI)
+            {
+                // 老版UI：使用+5, +1, -1, -5
+                HourPlus5Text.Text = "+5";
+                HourPlus1Text.Text = "+1";
+                HourMinus1Text.Text = "-1";
+                HourMinus5Text.Text = "-5";
+                
+                MinutePlus5Text.Text = "+5";
+                MinutePlus1Text.Text = "+1";
+                MinuteMinus1Text.Text = "-1";
+                MinuteMinus5Text.Text = "-5";
+                
+                SecondPlus5Text.Text = "+5";
+                SecondPlus1Text.Text = "+1";
+                SecondMinus1Text.Text = "-1";
+                SecondMinus5Text.Text = "-5";
+            }
+            else
+            {
+                // 新版UI：使用箭头符号
+                HourPlus5Text.Text = "∧∧";
+                HourPlus1Text.Text = "∧";
+                HourMinus1Text.Text = "∨";
+                HourMinus5Text.Text = "∨∨";
+                
+                MinutePlus5Text.Text = "∧∧";
+                MinutePlus1Text.Text = "∧";
+                MinuteMinus1Text.Text = "∨";
+                MinuteMinus5Text.Text = "∨∨";
+                
+                SecondPlus5Text.Text = "∧∧";
+                SecondPlus1Text.Text = "∧";
+                SecondMinus1Text.Text = "∨";
+                SecondMinus5Text.Text = "∨∨";
+            }
+        }
+
+        private void PlayTimerSound()
+        {
+            try
+            {
+                double volume = MainWindow.Settings.RandSettings?.TimerVolume ?? 1.0;
+                mediaPlayer.Volume = volume;
+                
+                if (!string.IsNullOrEmpty(MainWindow.Settings.RandSettings?.CustomTimerSoundPath) && 
+                    System.IO.File.Exists(MainWindow.Settings.RandSettings.CustomTimerSoundPath))
+                {
+                    // 播放自定义铃声
+                    mediaPlayer.Open(new Uri(MainWindow.Settings.RandSettings.CustomTimerSoundPath));
+                }
+                else
+                {
+                    // 播放默认铃声
+                    string tempPath = System.IO.Path.GetTempFileName() + ".wav";
+                    using (var stream = Properties.Resources.TimerDownNotice)
+                    {
+                        using (var fileStream = new System.IO.FileStream(tempPath, System.IO.FileMode.Create))
+                        {
+                            stream.CopyTo(fileStream);
+                        }
+                    }
+                    mediaPlayer.Open(new Uri(tempPath));
+                }
+                
+                mediaPlayer.Play();
+            }
+            catch (Exception ex)
+            {
+                // 如果播放失败，静默处理
+                System.Diagnostics.Debug.WriteLine($"播放计时器铃声失败: {ex.Message}");
+            }
+        }
+
         private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
         {
             isTimerRunning = false;
@@ -344,7 +439,7 @@ namespace Ink_Canvas
             Close();
         }
 
-        private bool _isInCompact = false;
+        private bool _isInCompact;
 
         private void BtnMinimal_OnMouseUp(object sender, MouseButtonEventArgs e)
         {

Ink Canvas/Windows/SettingsViews/SettingsWindow.xaml.cs

@@ -398,7 +398,7 @@ namespace Ink_Canvas.Windows
             ((Border)border).Background = new SolidColorBrush(Color.FromRgb(138, 138, 138));
         }
 
-        private Border _sidebarItemMouseDownBorder = null;
+        private Border _sidebarItemMouseDownBorder;
 
         private void SidebarItem_MouseDown(object sender, MouseButtonEventArgs e)
         {
@@ -999,7 +999,7 @@ namespace Ink_Canvas.Windows
             public Image ThumbImage { get; set; }
             public Border TrackBorder { get; set; }
             public Border ValueBorder { get; set; }
-            public bool IsTouchCaptured { get; set; } = false;
+            public bool IsTouchCaptured { get; set; }
         }
 
         #endregion