WPF利用WindowChrome实现自定义窗口
作者:黑夜中的潜行者
简介
截取Microsoft文章的一段话:
若要在保留其标准功能时自定义窗口,可以使用该 WindowChrome 类。 该 WindowChrome 类将窗口框架的功能与视觉对象分开,并允许你控制应用程序窗口的客户端和非客户端区域之间的边界。 通过 WindowChrome 该类,可以通过扩展工作区来覆盖非工作区,将 WPF 内容置于窗口框架中。 同时,它通过两个不可见区域保留系统行为: 调整边框 和 标题 区域的大小。
效果图
自定义最小化、最大化、关闭按钮
最小化按钮
<Style x:Key="SystemCloseButtonStyle" BasedOn="{StaticResource SystemButtonStyleBase}" TargetType="{x:Type Button}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type Button}"> <Grid Background="{TemplateBinding Background}"> <Viewbox Width="12" Height="12"> <Path Data="M550.848 502.496l308.64-308.896a31.968 31.968 0 1 0-45.248-45.248l-308.608 308.896-308.64-308.928a31.968 31.968 0 1 0-45.248 45.248l308.64 308.896-308.64 308.896a31.968 31.968 0 1 0 45.248 45.248l308.64-308.896 308.608 308.896a31.968 31.968 0 1 0 45.248-45.248l-308.64-308.864z" Fill="{TemplateBinding BorderBrush}" /> </Viewbox> <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" Content="{TemplateBinding Content}" /> </Grid> <ControlTemplate.Triggers> <Trigger Property="IsMouseOver" Value="True"> <Setter Property="Background" Value="{StaticResource CloseColor}" /> <Setter Property="BorderBrush" Value="{StaticResource DominantColor}" /> </Trigger> <Trigger Property="IsFocused" Value="True"> <Setter Property="FocusVisualStyle" Value="{x:Null}" /> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style>
最大化按钮
<Style x:Key="SystemMaxButtonStyle" BasedOn="{StaticResource SystemButtonStyleBase}" TargetType="{x:Type Button}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type Button}"> <Grid Background="{TemplateBinding Background}"> <Viewbox Width="12" Height="12"> <Path Data="M959.72 0H294.216a63.96 63.96 0 0 0-63.96 63.96v127.92H64.28A63.96 63.96 0 0 0 0.32 255.84V959.4a63.96 63.96 0 0 0 63.96 63.96h703.56a63.96 63.96 0 0 0 63.96-63.96V792.465h127.92a63.96 63.96 0 0 0 63.96-63.96V63.96A63.96 63.96 0 0 0 959.72 0zM767.84 728.505V959.4H64.28V255.84h703.56z m189.322 0H831.8V255.84a63.96 63.96 0 0 0-63.96-63.96H294.216V63.96H959.72z" Fill="{TemplateBinding BorderBrush}" /> </Viewbox> <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" Content="{TemplateBinding Content}" /> </Grid> <ControlTemplate.Triggers> <Trigger Property="IsMouseOver" Value="True"> <Setter Property="Background" Value="{StaticResource SuspensionColor}" /> </Trigger> <Trigger Property="IsFocused" Value="True"> <Setter Property="FocusVisualStyle" Value="{x:Null}" /> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style>
关闭按钮
<Style x:Key="SystemMinButtonStyle" BasedOn="{StaticResource SystemButtonStyleBase}" TargetType="{x:Type Button}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type Button}"> <Grid Background="{TemplateBinding Background}"> <Viewbox Width="12" Height="10"> <Path Data="M928.2 548h-832c-17.7 0-32-14.3-32-32s14.3-32 32-32h832c17.7 0 32 14.3 32 32s-14.3 32-32 32z" Fill="{TemplateBinding BorderBrush}" /> </Viewbox> <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" Content="{TemplateBinding Content}" /> </Grid> <ControlTemplate.Triggers> <Trigger Property="IsMouseOver" Value="True"> <Setter Property="Background" Value="{StaticResource SuspensionColor}" /> </Trigger> <Trigger Property="IsFocused" Value="True"> <Setter Property="FocusVisualStyle" Value="{x:Null}" /> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style>
/// <summary> /// 窗口移动 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void Move_Click(object sender, System.Windows.Input.MouseButtonEventArgs e) => this.DragMove(); /// <summary> /// 最小化 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void BtnMin_Click(object sender, RoutedEventArgs e) => WindowState = WindowState.Minimized; /// <summary> /// 最大化/还原 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void BtnMax_Click(object sender, RoutedEventArgs e) => WindowState = WindowState is WindowState.Normal ? WindowState.Maximized : WindowState.Normal; /// <summary> /// 关闭 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void BtnClose_Click(object sender, RoutedEventArgs e) => Application.Current.Shutdown();
布局实现
首先我们需要在 MainWindow 也就是我们的主窗口中的 Window.Resources 中实现 WindowChrome 的基本样式:
WindowChrome.ResizeBorderThickness 设置不可见边框宽度
WindowChrome.CaptionHeight> 设置属于标题栏的范围——高度
WindowChrome.UseAeroCaptionButtons 是否启用默认系统按钮功能——三大金刚键
WindowChrome.NonClientFrameEdges 设置客户区域,使用 bottom 可以实现加载时空白窗口而不显示默认窗口,提升用户体验
<Window x:Class="SignalRClient.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:local="clr-namespace:SignalRClient" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" Title="" Width="880" Height="620" MinWidth="700" MinHeight="500" Style="{StaticResource mainWindow}" WindowChrome.WindowChrome="{DynamicResource WindowChromeKey}" WindowStartupLocation="CenterScreen" mc:Ignorable="d"> <Window.Resources> <WindowChrome x:Key="WindowChromeKey"> <WindowChrome.ResizeBorderThickness> <Thickness>5</Thickness> </WindowChrome.ResizeBorderThickness> <WindowChrome.CaptionHeight>60</WindowChrome.CaptionHeight> <WindowChrome.UseAeroCaptionButtons>false</WindowChrome.UseAeroCaptionButtons> <WindowChrome.NonClientFrameEdges>bottom</WindowChrome.NonClientFrameEdges> </WindowChrome> </Window.Resources> </Window>
重写窗口,实现最大化窗口下,标题栏及客户区域偏移问题的修正。
通过代码获取当前窗口的工作区域,及任务栏以外的其他区域
System.Windows.SystemParameters.WorkArea.Width 获取工作区域的宽
System.Windows.SystemParameters.WorkArea.Height 获取工作区域的高
为什么要使用 ValueConverter 主要是因为 WorkArea 返回的类型无法直接 binding xaml
<ValueConverters:WorkAreaWidth x:Key="workAreaWidth" /> <ValueConverters:WorkAreaHeight x:Key="workAreaHeight" /> <Style x:Key="mainWindow" TargetType="{x:Type Window}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="Window"> <ContentControl x:Name="window" Content="{TemplateBinding Content}" /> <ControlTemplate.Triggers> <Trigger Property="WindowState" Value="Maximized"> <Setter TargetName="window" Property="MaxHeight" Value="{Binding Converter={StaticResource workAreaHeight}}" /> <Setter TargetName="window" Property="MaxWidth" Value="{Binding Converter={StaticResource workAreaWidth}}" /> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style>
using System; using System.Globalization; using System.Windows.Data; namespace SignalRClient.ValueConverters { internal class WorkAreaWidth : IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { return System.Windows.SystemParameters.WorkArea.Width; } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { throw new NotImplementedException(); } } }
using System; using System.Globalization; using System.Windows.Data; namespace SignalRClient.ValueConverters { internal class WorkAreaHeight : IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { return System.Windows.SystemParameters.WorkArea.Height; } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { throw new NotImplementedException(); } } }
结语
一开始,确实很难搞,Microsoft 的文档,里面也并没有,详细介绍窗口内容溢出的问题,但是只要仔细研究过 WPF 的同学都知道,很多东西是可以通过 Trigger
来实现的。Get 到这一点很多问题就迎刃而解了。
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