diff --git a/Ink Canvas/App.xaml.cs b/Ink Canvas/App.xaml.cs index 2e4f8e12..4def5a10 100644 --- a/Ink Canvas/App.xaml.cs +++ b/Ink Canvas/App.xaml.cs @@ -299,8 +299,7 @@ namespace Ink_Canvas try { // 获取主窗口实例并清理PowerPoint进程守护 - var mainWindow = Current.MainWindow as MainWindow; - if (mainWindow != null) + if (Current.MainWindow is MainWindow mainWindow) { // 通过反射调用StopPowerPointProcessMonitoring方法 var method = mainWindow.GetType().GetMethod("StopPowerPointProcessMonitoring", diff --git a/Ink Canvas/Helpers/AvoidFullScreenHelper.cs b/Ink Canvas/Helpers/AvoidFullScreenHelper.cs index 06ef4db8..f978a5ed 100644 --- a/Ink Canvas/Helpers/AvoidFullScreenHelper.cs +++ b/Ink Canvas/Helpers/AvoidFullScreenHelper.cs @@ -30,8 +30,7 @@ namespace Ink_Canvas.Helpers if (!(bool)window.GetValue(IsAvoidFullScreenEnabledProperty)) { - var hwndSource = PresentationSource.FromVisual(window) as HwndSource; - if (hwndSource != null) + if (PresentationSource.FromVisual(window) is HwndSource hwndSource) { hwndSource.AddHook(KeepInWorkingAreaHook); window.SetValue(IsAvoidFullScreenEnabledProperty, true); @@ -46,8 +45,7 @@ namespace Ink_Canvas.Helpers if ((bool)window.GetValue(IsAvoidFullScreenEnabledProperty)) { - var hwndSource = PresentationSource.FromVisual(window) as HwndSource; - if (hwndSource != null) + if (PresentationSource.FromVisual(window) is HwndSource hwndSource) { hwndSource.RemoveHook(KeepInWorkingAreaHook); window.ClearValue(IsAvoidFullScreenEnabledProperty); @@ -61,8 +59,7 @@ namespace Ink_Canvas.Helpers private static IntPtr KeepInWorkingAreaHook(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled) { // 只拦截主画布窗口的全屏（最大化）操作 - var window = HwndSource.FromHwnd(hwnd)?.RootVisual as Window; - if (window == null) return IntPtr.Zero; + if (!(HwndSource.FromHwnd(hwnd)?.RootVisual is Window window)) return IntPtr.Zero; // 这里假设主画布窗口类名为MainWindow（如有不同请调整） if (window.GetType().Name != "MainWindow") return IntPtr.Zero; diff --git a/Ink Canvas/Helpers/InkFadeManager.cs b/Ink Canvas/Helpers/InkFadeManager.cs index 23d74ef5..81802a52 100644 --- a/Ink Canvas/Helpers/InkFadeManager.cs +++ b/Ink Canvas/Helpers/InkFadeManager.cs @@ -112,8 +112,7 @@ namespace Ink_Canvas.Helpers { // 将墨迹添加到 inkCanvas 的父容器中，而不是 inkCanvas.Children // 这样可以避免坐标系统问题 - var parent = _mainWindow.inkCanvas.Parent as Panel; - if (parent != null) + if (_mainWindow.inkCanvas.Parent is Panel parent) { parent.Children.Add(strokeVisual); } @@ -159,8 +158,7 @@ namespace Ink_Canvas.Helpers try { // 从父容器中移除墨迹 - var parent = _mainWindow.inkCanvas?.Parent as Panel; - if (parent != null && parent.Children.Contains(visual)) + if (_mainWindow.inkCanvas?.Parent is Panel parent && parent.Children.Contains(visual)) { parent.Children.Remove(visual); } @@ -518,8 +516,7 @@ namespace Ink_Canvas.Helpers originalVisual.Visibility = Visibility.Hidden; var segments = new List(); - var parent = _mainWindow.inkCanvas?.Parent as Panel; - if (parent == null) + if (!(_mainWindow.inkCanvas?.Parent is Panel parent)) { // 如果父容器不是Panel，直接使用InkCanvas parent = null; // 稍后会检查并使用InkCanvas.Children @@ -875,8 +872,7 @@ namespace Ink_Canvas.Helpers try { // 从父容器中移除墨迹 - var parent = _mainWindow.inkCanvas?.Parent as Panel; - if (parent != null && parent.Children.Contains(visual)) + if (_mainWindow.inkCanvas?.Parent is Panel parent && parent.Children.Contains(visual)) { parent.Children.Remove(visual); } diff --git a/Ink Canvas/Helpers/Plugins/BuiltIn/SuperLauncherPlugin.cs b/Ink Canvas/Helpers/Plugins/BuiltIn/SuperLauncherPlugin.cs index 555c7bf9..d243314f 100644 --- a/Ink Canvas/Helpers/Plugins/BuiltIn/SuperLauncherPlugin.cs +++ b/Ink Canvas/Helpers/Plugins/BuiltIn/SuperLauncherPlugin.cs @@ -313,8 +313,7 @@ namespace Ink_Canvas.Helpers.Plugins.BuiltIn var buttonElement = _launcherButton.Element; // 查找浮动栏 - var floatingBar = mainWindow.FindName("StackPanelFloatingBar") as Panel; - if (floatingBar == null) + if (!(mainWindow.FindName("StackPanelFloatingBar") is Panel floatingBar)) { // 如果直接查找失败，则尝试遍历可视树查找 Panel floatingBarPanelFromTree = null; @@ -405,8 +404,7 @@ namespace Ink_Canvas.Helpers.Plugins.BuiltIn var buttonElement = _launcherButton.Element; // 查找浮动栏 - var floatingBar = mainWindow.FindName("StackPanelFloatingBar") as Panel; - if (floatingBar == null) + if (!(mainWindow.FindName("StackPanelFloatingBar") is Panel floatingBar)) { // 如果直接查找失败，则尝试遍历可视树查找 Panel floatingBarPanelFromTree = null; diff --git a/Ink Canvas/Helpers/ScreenDetectionHelper.cs b/Ink Canvas/Helpers/ScreenDetectionHelper.cs index 5d048a7f..5f9fb6ae 100644 --- a/Ink Canvas/Helpers/ScreenDetectionHelper.cs +++ b/Ink Canvas/Helpers/ScreenDetectionHelper.cs @@ -25,8 +25,7 @@ namespace Ink_Canvas.Helpers return Screen.PrimaryScreen; // 获取窗口的句柄 - var hwndSource = PresentationSource.FromVisual(window) as HwndSource; - if (hwndSource == null) + if (!(PresentationSource.FromVisual(window) is HwndSource hwndSource)) return Screen.PrimaryScreen; // 获取窗口在屏幕上的位置 diff --git a/Ink Canvas/Helpers/WinTabWindowsChecker.cs b/Ink Canvas/Helpers/WinTabWindowsChecker.cs index 0f1a7577..43f60b05 100644 --- a/Ink Canvas/Helpers/WinTabWindowsChecker.cs +++ b/Ink Canvas/Helpers/WinTabWindowsChecker.cs @@ -61,8 +61,7 @@ namespace Ink_Canvas.Helpers { if (windowTitle.Length == windowName.Length) { - WindowPattern windowPattern = window.GetCurrentPattern(WindowPattern.Pattern) as WindowPattern; - if (windowPattern != null) + if (window.GetCurrentPattern(WindowPattern.Pattern) is WindowPattern windowPattern) { return true; } @@ -70,8 +69,7 @@ namespace Ink_Canvas.Helpers } else { - WindowPattern windowPattern = window.GetCurrentPattern(WindowPattern.Pattern) as WindowPattern; - if (windowPattern != null) + if (window.GetCurrentPattern(WindowPattern.Pattern) is WindowPattern windowPattern) { return true; } diff --git a/Ink Canvas/MainWindow.xaml.cs b/Ink Canvas/MainWindow.xaml.cs index b152bf8e..fc7d8ff3 100644 --- a/Ink Canvas/MainWindow.xaml.cs +++ b/Ink Canvas/MainWindow.xaml.cs @@ -26,6 +26,7 @@ using System.Windows.Threading; using Application = System.Windows.Application; using Brushes = System.Windows.Media.Brushes; using Button = System.Windows.Controls.Button; +using ComboBox = System.Windows.Controls.ComboBox; using Cursor = System.Windows.Input.Cursor; using Cursors = System.Windows.Input.Cursors; using DpiChangedEventArgs = System.Windows.DpiChangedEventArgs; @@ -328,8 +329,7 @@ namespace Ink_Canvas private void inkCanvas_EditingModeChanged(object sender, RoutedEventArgs e) { - var inkCanvas1 = sender as InkCanvas; - if (inkCanvas1 == null) return; + if (!(sender is InkCanvas inkCanvas1)) return; // 使用辅助方法设置光标 SetCursorBasedOnEditingMode(inkCanvas1); @@ -358,8 +358,7 @@ namespace Ink_Canvas if (inkCanvas1.EditingMode == InkCanvasEditingMode.Ink) forcePointEraser = !forcePointEraser; // 处理橡皮擦覆盖层的启用/禁用 - var eraserOverlay = FindName("EraserOverlayCanvas") as Canvas; - if (eraserOverlay != null) + if (FindName("EraserOverlayCanvas") is Canvas eraserOverlay) { if (inkCanvas1.EditingMode == InkCanvasEditingMode.EraseByPoint) { @@ -1301,8 +1300,7 @@ namespace Ink_Canvas BorderSettingsMask.Background = new SolidColorBrush(Color.FromArgb(1, 0, 0, 0)); // 获取SettingsPanelScrollViewer中的所有GroupBox - var stackPanel = SettingsPanelScrollViewer.Content as StackPanel; - if (stackPanel == null) return; + if (!(SettingsPanelScrollViewer.Content is StackPanel stackPanel)) return; // 确保所有GroupBox都是可见的 foreach (var child in stackPanel.Children) @@ -1517,20 +1515,15 @@ namespace Ink_Canvas // 清除所有导航按钮的Tag属性 private void ClearAllNavButtonTags() { - var grid = BorderSettings.Child as Grid; - if (grid == null) return; + if (!(BorderSettings.Child is Grid grid)) return; - var navSidebar = grid.Children[0] as Border; - if (navSidebar == null) return; + if (!(grid.Children[0] is Border navSidebar)) return; - var navGrid = navSidebar.Child as Grid; - if (navGrid == null) return; + if (!(navSidebar.Child is Grid navGrid)) return; - var scrollViewer = navGrid.Children[1] as ScrollViewer; - if (scrollViewer == null) return; + if (!(navGrid.Children[1] is ScrollViewer scrollViewer)) return; - var stackPanel = scrollViewer.Content as StackPanel; - if (stackPanel == null) return; + if (!(scrollViewer.Content is StackPanel stackPanel)) return; foreach (var child in stackPanel.Children) { @@ -1544,30 +1537,24 @@ namespace Ink_Canvas // 设置导航按钮的Tag属性 private void SetNavButtonTag(string tag) { - var grid = BorderSettings.Child as Grid; - if (grid == null) return; + if (!(BorderSettings.Child is Grid grid)) return; - var navSidebar = grid.Children[0] as Border; - if (navSidebar == null) return; + if (!(grid.Children[0] is Border navSidebar)) return; - var navGrid = navSidebar.Child as Grid; - if (navGrid == null) return; + if (!(navSidebar.Child is Grid navGrid)) return; - var scrollViewer = navGrid.Children[1] as ScrollViewer; - if (scrollViewer == null) return; + if (!(navGrid.Children[1] is ScrollViewer scrollViewer)) return; - var stackPanel = scrollViewer.Content as StackPanel; - if (stackPanel == null) return; + if (!(scrollViewer.Content is StackPanel stackPanel)) return; foreach (var child in stackPanel.Children) { if (child is Button button) { // 检查按钮的ToolTip属性，根据tag设置对应的按钮 - string buttonTag = button.Tag as string; // 如果按钮的Tag与要设置的tag匹配，则设置Tag - if (buttonTag != null && buttonTag.ToLower() == tag.ToLower()) + if (button.Tag is string buttonTag && buttonTag.ToLower() == tag.ToLower()) { button.Tag = tag; return; @@ -2546,8 +2533,7 @@ namespace Ink_Canvas try { // 获取滑块的轨道元素 - var track = slider.Template.FindName("PART_Track", slider) as Track; - if (track == null) + if (!(slider.Template.FindName("PART_Track", slider) is Track track)) { // 如果找不到轨道，使用简单方法 UpdateSliderValueFromPosition(slider, position); @@ -2674,8 +2660,7 @@ namespace Ink_Canvas { try { - var toggle = sender as ToggleSwitch; - if (toggle != null) + if (sender is ToggleSwitch toggle) { Settings.ModeSettings.IsPPTOnlyMode = toggle.IsOn; @@ -2773,8 +2758,7 @@ namespace Ink_Canvas try { - System.Windows.Controls.ComboBox comboBox = sender as System.Windows.Controls.ComboBox; - if (comboBox != null) + if (sender is ComboBox comboBox) { Settings.Appearance.Theme = comboBox.SelectedIndex; diff --git a/Ink Canvas/MainWindow_cs/MW_BoardControls.cs b/Ink Canvas/MainWindow_cs/MW_BoardControls.cs index e4262503..895fe12d 100644 --- a/Ink Canvas/MainWindow_cs/MW_BoardControls.cs +++ b/Ink Canvas/MainWindow_cs/MW_BoardControls.cs @@ -238,9 +238,8 @@ namespace Ink_Canvas RefreshBlackBoardSidePageListView(); AnimationsHelper.ShowWithSlideFromBottomAndFade(BoardBorderLeftPageListView); await Task.Delay(1); - var leftContainer = BlackBoardLeftSidePageListView.ItemContainerGenerator.ContainerFromIndex( - CurrentWhiteboardIndex - 1) as ListViewItem; - if (leftContainer != null) + if (BlackBoardLeftSidePageListView.ItemContainerGenerator.ContainerFromIndex( + CurrentWhiteboardIndex - 1) is ListViewItem leftContainer) { ScrollViewToVerticalTop(leftContainer, BlackBoardLeftSidePageListScrollViewer); } @@ -258,9 +257,8 @@ namespace Ink_Canvas RefreshBlackBoardSidePageListView(); AnimationsHelper.ShowWithSlideFromBottomAndFade(BoardBorderRightPageListView); await Task.Delay(1); - var rightContainer = BlackBoardRightSidePageListView.ItemContainerGenerator.ContainerFromIndex( - CurrentWhiteboardIndex - 1) as ListViewItem; - if (rightContainer != null) + if (BlackBoardRightSidePageListView.ItemContainerGenerator.ContainerFromIndex( + CurrentWhiteboardIndex - 1) is ListViewItem rightContainer) { ScrollViewToVerticalTop(rightContainer, BlackBoardRightSidePageListScrollViewer); } diff --git a/Ink Canvas/MainWindow_cs/MW_BoardIcons.cs b/Ink Canvas/MainWindow_cs/MW_BoardIcons.cs index ab4a399e..017700cd 100644 --- a/Ink Canvas/MainWindow_cs/MW_BoardIcons.cs +++ b/Ink Canvas/MainWindow_cs/MW_BoardIcons.cs @@ -504,8 +504,7 @@ namespace Ink_Canvas BackgroundPalette.Child = stackPanel; // 获取主窗口中的根网格，确保面板添加到顶层 - Grid mainGrid = FindName("Main_Grid") as Grid; - if (mainGrid != null) + if (FindName("Main_Grid") is Grid mainGrid) { // 删除可能已存在的BackgroundPalette foreach (UIElement element in mainGrid.Children) @@ -526,8 +525,7 @@ namespace Ink_Canvas mainGrid.Children.Add(BackgroundPalette); // 设置面板位置 - var clickElement = FindName("BoardChangeBackgroundColorBtn") as FrameworkElement; - if (clickElement != null) + if (FindName("BoardChangeBackgroundColorBtn") is FrameworkElement clickElement) { Point position = clickElement.TranslatePoint(new Point(0, 0), mainGrid); BackgroundPalette.Margin = new Thickness( @@ -551,10 +549,9 @@ namespace Ink_Canvas { if (modePanel.Children.Count > 1) { - var whiteboardButton = modePanel.Children[0] as Border; var blackboardButton = modePanel.Children[1] as Border; - if (whiteboardButton != null && whiteboardButton.Child is TextBlock whiteboardText) + if (modePanel.Children[0] is Border whiteboardButton && whiteboardButton.Child is TextBlock whiteboardText) { whiteboardButton.Background = Settings.Canvas.UsingWhiteboard ? new SolidColorBrush(Color.FromRgb(0x25, 0x63, 0xeb)) : diff --git a/Ink Canvas/MainWindow_cs/MW_Eraser.cs b/Ink Canvas/MainWindow_cs/MW_Eraser.cs index e5d21a04..887a8726 100644 --- a/Ink Canvas/MainWindow_cs/MW_Eraser.cs +++ b/Ink Canvas/MainWindow_cs/MW_Eraser.cs @@ -85,9 +85,8 @@ namespace Ink_Canvas // 根据橡皮擦形状选择对应的图像资源 string resourceKey = isEraserCircleShape ? "EllipseEraserImageSource" : "RectangleEraserImageSource"; - var imageSource = TryFindResource(resourceKey) as DrawingImage; - - if (imageSource != null) + + if (TryFindResource(resourceKey) is DrawingImage imageSource) { eraserFeedback.Source = imageSource; } diff --git a/Ink Canvas/MainWindow_cs/MW_FloatingWindowInterceptor.cs b/Ink Canvas/MainWindow_cs/MW_FloatingWindowInterceptor.cs index 1df2cdf7..4d1a4089 100644 --- a/Ink Canvas/MainWindow_cs/MW_FloatingWindowInterceptor.cs +++ b/Ink Canvas/MainWindow_cs/MW_FloatingWindowInterceptor.cs @@ -53,8 +53,7 @@ namespace Ink_Canvas foreach (var kvp in Settings.Automation.FloatingWindowInterceptor.InterceptRules) { var toggleName = $"ToggleSwitch{kvp.Key}"; - var toggle = FindName(toggleName) as ToggleSwitch; - if (toggle != null) + if (FindName(toggleName) is ToggleSwitch toggle) { toggle.IsOn = kvp.Value; } diff --git a/Ink Canvas/MainWindow_cs/MW_Settings.cs b/Ink Canvas/MainWindow_cs/MW_Settings.cs index 9b40bdb3..75bb9482 100644 --- a/Ink Canvas/MainWindow_cs/MW_Settings.cs +++ b/Ink Canvas/MainWindow_cs/MW_Settings.cs @@ -2895,8 +2895,7 @@ namespace Ink_Canvas private async void UpdateChannelSelector_Checked(object sender, RoutedEventArgs e) { if (!isLoaded) return; - var radioButton = sender as RadioButton; - if (radioButton != null) + if (sender is RadioButton radioButton) { string channel = radioButton.Tag.ToString(); UpdateChannel newChannel = channel == "Beta" ? UpdateChannel.Beta : UpdateChannel.Release; diff --git a/Ink Canvas/MainWindow_cs/MW_ShapeDrawing.cs b/Ink Canvas/MainWindow_cs/MW_ShapeDrawing.cs index b2840d8a..083b5faf 100644 --- a/Ink Canvas/MainWindow_cs/MW_ShapeDrawing.cs +++ b/Ink Canvas/MainWindow_cs/MW_ShapeDrawing.cs @@ -489,20 +489,16 @@ namespace Ink_Canvas { SetCursorBasedOnEditingMode(inkCanvas); } - - // 修复：几何绘制模式下完全禁止触摸轨迹收集 + if (drawingShapeMode != 0) { - // 确保几何绘制模式下不切换到Ink模式，避免触摸轨迹被收集 inkCanvas.EditingMode = InkCanvasEditingMode.None; if (isWaitUntilNextTouchDown && dec.Count > 1) return; if (dec.Count > 1) { - // 修复：双曲线绘制时，多指触摸不应该删除第一笔的辅助线 if ((drawingShapeMode == 24 || drawingShapeMode == 25) && drawMultiStepShapeCurrentStep == 1) { - // 第二笔绘制双曲线时，只删除第二笔的临时笔画，保留第一笔的辅助线 try { inkCanvas.Strokes.Remove(lastTempStroke); @@ -523,13 +519,10 @@ namespace Ink_Canvas } return; } - - // 修复：双曲线绘制时，第二笔应该基于第一笔的起点，而不是触摸实时位置 + Point touchPoint = e.GetTouchPoint(inkCanvas).Position; if ((drawingShapeMode == 24 || drawingShapeMode == 25) && drawMultiStepShapeCurrentStep == 1) { - // 第二笔绘制双曲线时，使用触摸位置作为终点，但保持第一笔的起点 - // 这里不需要特殊处理，因为MouseTouchMove函数内部已经正确处理了双曲线的绘制逻辑 MouseTouchMove(touchPoint); } else @@ -538,15 +531,13 @@ namespace Ink_Canvas MouseTouchMove(touchPoint); } - return; // 处理完几何绘制后直接返回，不执行后面的代码 + return; } - - // 其它模式下，允许橡皮、套索、批注等正常工作，不覆盖EditingMode + if (inkCanvas.EditingMode == InkCanvasEditingMode.EraseByPoint || inkCanvas.EditingMode == InkCanvasEditingMode.Select || inkCanvas.EditingMode == InkCanvasEditingMode.Ink) { - // 允许正常橡皮、套索、批注 } } diff --git a/Ink Canvas/MainWindow_cs/MW_TrayIcon.cs b/Ink Canvas/MainWindow_cs/MW_TrayIcon.cs index 678f8232..2c5d209d 100644 --- a/Ink Canvas/MainWindow_cs/MW_TrayIcon.cs +++ b/Ink Canvas/MainWindow_cs/MW_TrayIcon.cs @@ -211,22 +211,18 @@ namespace Ink_Canvas // 获取全局快捷键管理器 var hotkeyManagerField = typeof(MainWindow).GetField("_globalHotkeyManager", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance); - var hotkeyManager = hotkeyManagerField?.GetValue(mainWin) as GlobalHotkeyManager; - - if (hotkeyManager != null) + + if (hotkeyManagerField?.GetValue(mainWin) is GlobalHotkeyManager hotkeyManager) { // 禁用所有快捷键 hotkeyManager.DisableHotkeyRegistration(); // 更新菜单项文本和状态 - var menuItem = sender as MenuItem; - if (menuItem != null) + if (sender is MenuItem menuItem) { - var headerPanel = menuItem.Header as SimpleStackPanel; - if (headerPanel != null) + if (menuItem.Header is SimpleStackPanel headerPanel) { - var textBlock = headerPanel.Children[0] as TextBlock; - if (textBlock != null) + if (headerPanel.Children[0] is TextBlock textBlock) { if (textBlock.Text == "禁用所有快捷键") { diff --git a/Ink Canvas/Windows/ScreenshotSelectorWindow.xaml.cs b/Ink Canvas/Windows/ScreenshotSelectorWindow.xaml.cs index a03480dc..0eba067e 100644 --- a/Ink Canvas/Windows/ScreenshotSelectorWindow.xaml.cs +++ b/Ink Canvas/Windows/ScreenshotSelectorWindow.xaml.cs @@ -517,18 +517,17 @@ namespace Ink_Canvas private void Window_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { // 检查是否点击了UI元素，如果是则不处理选择 - var hitElement = e.Source as FrameworkElement; - if (hitElement != null && ( - hitElement is Ellipse || - hitElement is System.Windows.Controls.Button || - hitElement is Border || - hitElement is TextBlock || - hitElement is StackPanel || - hitElement is Separator || - hitElement.Name == "SizeInfoBorder" || - hitElement.Name == "HintText" || - hitElement.Name == "AdjustModeHint" || - hitElement.Name == "SelectionRectangle")) + if (e.Source is FrameworkElement hitElement && ( + hitElement is Ellipse || + hitElement is System.Windows.Controls.Button || + hitElement is Border || + hitElement is TextBlock || + hitElement is StackPanel || + hitElement is Separator || + hitElement.Name == "SizeInfoBorder" || + hitElement.Name == "HintText" || + hitElement.Name == "AdjustModeHint" || + hitElement.Name == "SelectionRectangle")) { return; } diff --git a/Ink Canvas/Windows/SettingsViews/SettingsWindow.xaml.cs b/Ink Canvas/Windows/SettingsViews/SettingsWindow.xaml.cs index 583f1021..93f879d4 100644 --- a/Ink Canvas/Windows/SettingsViews/SettingsWindow.xaml.cs +++ b/Ink Canvas/Windows/SettingsViews/SettingsWindow.xaml.cs @@ -440,16 +440,14 @@ namespace Ink_Canvas.Windows private void ToggleSwitch_Click(object sender, MouseButtonEventArgs e) { - var border = sender as Border; - if (border != null) + if (sender is Border border) { // 切换开关状态 bool isOn = border.Background.ToString() == "#FF3584E4"; border.Background = isOn ? new SolidColorBrush(Color.FromRgb(225, 225, 225)) : new SolidColorBrush(Color.FromRgb(53, 132, 228)); // 切换内部圆点的位置 - var innerBorder = border.Child as Border; - if (innerBorder != null) + if (border.Child is Border innerBorder) { innerBorder.HorizontalAlignment = isOn ? HorizontalAlignment.Left : HorizontalAlignment.Right; } @@ -557,8 +555,7 @@ namespace Ink_Canvas.Windows private void OptionButton_Click(object sender, MouseButtonEventArgs e) { - var border = sender as Border; - if (border != null) + if (sender is Border border) { string tag = border.Tag?.ToString(); if (!string.IsNullOrEmpty(tag)) @@ -568,8 +565,7 @@ namespace Ink_Canvas.Windows // 设置当前按钮为选中状态 border.Background = new SolidColorBrush(Color.FromRgb(225, 225, 225)); - var textBlock = border.Child as TextBlock; - if (textBlock != null) + if (border.Child is TextBlock textBlock) { textBlock.FontWeight = FontWeights.Bold; } @@ -583,8 +579,7 @@ namespace Ink_Canvas.Windows private void ClearOtherOptionsInGroup(Border currentBorder, string currentTag) { // 获取当前按钮所在的父容器 - var parent = currentBorder.Parent as StackPanel; - if (parent != null) + if (currentBorder.Parent is StackPanel parent) { // 获取组名（Tag中下划线前的部分） string groupName = currentTag.Split('_')[0]; @@ -598,8 +593,7 @@ namespace Ink_Canvas.Windows if (!string.IsNullOrEmpty(childTag) && childTag.StartsWith(groupName + "_")) { border.Background = new SolidColorBrush(Colors.Transparent); - var textBlock = border.Child as TextBlock; - if (textBlock != null) + if (border.Child is TextBlock textBlock) { textBlock.FontWeight = FontWeights.Normal; } @@ -776,8 +770,7 @@ namespace Ink_Canvas.Windows if (child is Border border && border.Background != null) { - var brush = border.Background as SolidColorBrush; - if (brush != null && brush.Color.ToString() == "#FFDEDEDE") + if (border.Background is SolidColorBrush brush && brush.Color.ToString() == "#FFDEDEDE") { return border; } @@ -800,8 +793,7 @@ namespace Ink_Canvas.Windows if (child is Border border && border.Background != null) { - var brush = border.Background as SolidColorBrush; - if (brush != null && brush.Color.ToString() == "#FF3584E4") + if (border.Background is SolidColorBrush brush && brush.Color.ToString() == "#FF3584E4") { return border; } @@ -959,8 +951,7 @@ namespace Ink_Canvas.Windows var relativePosition = Math.Max(0, Math.Min(1, adjustedX / effectiveWidth)); // 更新滑块位置 - var thumbTransform = customSlider.ThumbImage.RenderTransform as TranslateTransform; - if (thumbTransform == null) + if (!(customSlider.ThumbImage.RenderTransform is TranslateTransform thumbTransform)) { thumbTransform = new TranslateTransform(); customSlider.ThumbImage.RenderTransform = thumbTransform;