WPF无边框窗口问题:Aero Snap和最大化

Question

我通过在XAML中设置以下窗口属性创建了一个无边框WPF窗口:

... WindowStyle="None" AllowsTransparency="True" ...

这会导致许多问题:

1)已解决:它不再具有任何内置的调整大小功能

2)已解决:它不再具有任何内置拖动功能

3)已解决:没有顶部工具栏,它不再具有最小化/最大化/恢复/关闭按钮

4)已解决:通过aero快照最大化或设置WindowState可防止它被取消.

5)通过aero快照最大化或设置WindowState将使用整个屏幕作为边界,与窗口工具栏重叠.

6)通过aero快照最大化或设置WindowState似乎包含-7边距,使窗口的每边7个像素超出窗口边缘.

通过制作xaml窗口模板来解决1-3.我使用了不可见的矩形作为句柄区域,后面的一些代码通过覆盖OnApplyTemplate()来应用,通过user32.dll SendMessage(...)附加功能,用于调整大小/移动/最小化/最大化/恢复/关闭.

我在这里找到了#4的答案

我尝试通过WndProc拦截最大化消息并手动设置大小/位置来解决5-6,但是这有一个问题,即将RestoreRegion覆盖到最大化的大小/位置,从而无法恢复窗口.

真正奇怪的是,从顶部边框调整窗口大小到屏幕顶部会触发aero full height snap,没有任何问题.

所以,我已经走了很长的路,但5-6仍然是一个问题......有没有办法手动指定最大化区域？或者,有没有办法设置窗口大小而不影响restoreregion属性？

Answer 1

最简单的完整解决方案

您好,以下解决方案以最简单的方式修复了您的问题中详述的所有问题,并使用WPF和最新版本的C#语言和.NET框架在Windows 10上运行.这是截至2017年3月15日.如果它停止工作,请告诉我.

第1步:要<Window ... > </Window>在应用程序的XAML中的标记内解决问题1,2和4,请将其粘贴到顶部或底部:

<WindowChrome.WindowChrome>
    <WindowChrome CaptionHeight="35"/>
<WindowChrome.WindowChrome>

CaptionHeight 是窗口拖动区域的所需高度.

第2步:要解决问题3,您需要创建标题栏和标题以及窗口控件.要做到这一点,你只需要给每个VerticalAlignment of Top提供所需的标题栏元素,或者将它们放入一个网格,其VerticalAlignment设置为Top,这将为所有这些做,但要确保它们的高度不是大于XAML中声明CaptionHeight的WindowChrome元素的属性,从步骤1.对于所有按钮,您必须为它们或它们的容器分配属性WindowChrome.IsHitTestVisibleInChrome="True".这是一个例子:

<Grid VerticalAlignment="Top" Background="White" Name="TitleBar" Height="35">
    <Label Content="Borderless Window Test" VerticalAlignment="Center" HorizontalAlignment="Left"/>
    <StackPanel WindowChrome.IsHitTestVisibleInChrome="True" VerticalAlignment="Center" HorizontalAlignment="Right" Orientation="Horizontal" Name="WindowControls">
        <Button Height="35" Width="35" Content="-" Padding="0" Name="MinimizeButton"/>
        <Button Height="35" Width="35" Content="+" Padding="0" Name="MaximizeButton"/>
        <Button Height="35" Width="35" Content="x" Padding="0" Name="CloseButton"/>
    </StackPanel>
</Grid>

现在,要在窗口控件按钮中添加适当的功能,在MainWindow()代码隐藏的构造函数中,应用程序的C#源代码,在调用之后粘贴以下内容InitializeComponent();:

CloseButton.Click += (s, e) => Close();
MaximizeButton.Click += (s, e) => WindowState = WindowState == WindowState.Normal ? WindowState.Maximized : WindowState.Normal;
MinimizeButton.Click += (s, e) => WindowState = WindowState.Minimized;

第3步:要解决问题5和6,您需要挂钩到WmGetMinMaxInfo.为此,请转到代码隐藏,然后将此Pastebin中的所有内容复制并粘贴到Window类中.现在,在您的MainWindow()构造函数中,粘贴:

SourceInitialized += (s, e) =>
{
    IntPtr handle = (new WindowInteropHelper(this)).Handle;
    HwndSource.FromHwnd(handle).AddHook(new HwndSourceHook(WindowProc));
};

通过Project > Add References在文件菜单中,一定有引用:

System.Management
System.Windows.Interop
System.Security.Principal
System.Runtime.InteropServices
Microsoft.Win32

检查的最佳方法是单击Assemblies左上角的选项卡,然后选择Framework,然后使用窗口右上角的搜索框.现在将所有这些使用(名称空间)添加到代码隐藏的顶部:

using System.Management;
using System.Windows.Interop;
using System.Security.Principal;
using System.Runtime.InteropServices;
using Microsoft.Win32;

这应该涵盖一切.我希望这有帮助!

Answer 2

我自己刚刚经历了这整件事。这是一项真正的苦差事，因为您必须手动考虑这么多。有趣的是，这些天我们认为很多事情都是理所当然的，就像基本窗口的运行方式一样简单。但是看看我提供的这个示例代码，可以很好地表明这个问题到底有多少。

我希望这会有所帮助，因为我自己花了一点时间才到达这里。

主窗口.Xaml

<Window x:Class="WpfApp1.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:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:local="clr-namespace:WpfApp1"
    Background="Transparent"
    WindowStartupLocation="CenterScreen"
    ResizeMode="CanResizeWithGrip"
    AllowsTransparency="True"
    WindowStyle="None"
    mc:Ignorable="d"
    Title="Test Window Behavior" Height="768" Width="1024" StateChanged="Window_StateChanged" PreviewMouseLeftButtonDown="Window_PreviewMouseLeftButtonDown">

<Grid>
    <DockPanel Grid.Column="1" Grid.Row="1">
        <DockPanel x:Name="titleBar" Background="White" DockPanel.Dock="Top">
            <Rectangle Width="32" Height="32" DockPanel.Dock="Left" Fill="Red" Margin="2"/>
            <StackPanel Orientation="Horizontal" DockPanel.Dock="Right" Margin="2">

                <!-- Minimize Button -->
                <Border Width="24" Height="24" Margin="2" HorizontalAlignment="Right" MouseLeftButtonUp="OnMinimizeWindow" Grid.Column="2">
                    <Border.Style>
                        <Style TargetType="Border">
                            <Setter Property="Background" Value="Transparent" />
                            <Style.Triggers>
                                <Trigger Property="IsMouseOver" Value="True">
                                    <Setter Property="Background" Value="#FFD0D0D0" />
                                </Trigger>
                            </Style.Triggers>
                        </Style>
                    </Border.Style>
                    <TextBlock FontSize="14" HorizontalAlignment="Center" VerticalAlignment="Center" Text="0" FontFamily="Webdings" />
                </Border>

                <!-- Maximize Button -->
                <Border Width="24" Height="24" Margin="2" HorizontalAlignment="Right" MouseLeftButtonUp="OnMaximizeWindow" Grid.Column="3">
                    <Border.Style>
                        <Style TargetType="Border">
                            <Setter Property="Background" Value="Transparent" />
                            <Style.Triggers>
                                <Trigger Property="IsMouseOver" Value="True">
                                    <Setter Property="Background" Value="#FFD0D0D0" />
                                </Trigger>
                            </Style.Triggers>
                        </Style>
                    </Border.Style>
                    <TextBlock x:Name="IsMaximized" FontSize="14" HorizontalAlignment="Center" VerticalAlignment="Center" FontFamily="Webdings">
                        <TextBlock.Style>
                            <Style TargetType="TextBlock">
                                <Setter Property="Text" Value="1" />
                                <Style.Triggers>
                                    <DataTrigger Binding="{Binding Path=InternalWindowState, RelativeSource={RelativeSource FindAncestor, AncestorType=Window}}" Value="Maximized">
                                        <Setter Property="Text" Value="2" />
                                    </DataTrigger>
                                </Style.Triggers>
                            </Style>
                        </TextBlock.Style>
                    </TextBlock>
                </Border>

                <!-- Close Button -->
                <Border Width="24" Height="24" Margin="2" HorizontalAlignment="Right" MouseLeftButtonUp="OnCloseWindow" Grid.Column="4">
                    <Border.Style>
                        <Style TargetType="Border">
                            <Setter Property="Background" Value="Transparent" />
                            <Style.Triggers>
                                <Trigger Property="IsMouseOver" Value="True">
                                    <Setter Property="Background" Value="Red" />
                                </Trigger>
                            </Style.Triggers>
                        </Style>
                    </Border.Style>
                    <TextBlock FontSize="14" HorizontalAlignment="Center" VerticalAlignment="Center" Text="r" FontFamily="Webdings" />
                </Border>
            </StackPanel>

            <Label MouseLeftButtonDown="OnDragMoveWindow" MouseDoubleClick="OnMaximizeWindow" Margin="8 0 0 0" FontSize="12" VerticalContentAlignment="Center" Content="{Binding Path=Title, RelativeSource={RelativeSource FindAncestor, AncestorType=Window}, FallbackValue='Main Window'}" />
        </DockPanel>

        <Grid Background="White" DockPanel.Dock="Bottom" Height="32">
            <Label VerticalContentAlignment="Center" Content="Statusbar Text Goes Here ..." />
        </Grid>

        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="100" />
                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="100" />
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>
                <RowDefinition Height="100" />
                <RowDefinition Height="*" />
                <RowDefinition Height="100" />
            </Grid.RowDefinitions>

            <!-- Top 3 -->
            <Border Background="Gray" Grid.Row="0" Grid.Column="0" />
            <Border Background="Gray" Grid.Row="0" Grid.Column="1" BorderBrush="Black" BorderThickness="0 0 0 1" />
            <Border Background="Gray" Grid.Row="0" Grid.Column="2" />

            <!-- Middle 2 -->
            <Border Background="Gray" Grid.Row="1" Grid.Column="0" BorderBrush="Black" BorderThickness="0 0 1 0" />
            <Border Background="Gray" Grid.Row="1" Grid.Column="2" BorderBrush="Black" BorderThickness="1 0 0 0" />

            <!-- Bottom 3 -->
            <Border Background="Gray" Grid.Row="2" Grid.Column="0" />
            <Border Background="Gray" Grid.Row="2" Grid.Column="1" BorderBrush="Black" BorderThickness="0 1 0 0" />
            <Border Background="Gray" Grid.Row="2" Grid.Column="2" />
        </Grid>
    </DockPanel>
    <Grid>
        <Grid.Resources>
            <Style TargetType="Thumb">
                <Style.Setters>
                    <Setter Property="Template">
                        <Setter.Value>
                            <ControlTemplate>
                                <Border Background="Transparent" />
                            </ControlTemplate>
                        </Setter.Value>
                    </Setter>
                </Style.Setters>
            </Style>
        </Grid.Resources>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="25" />
            <ColumnDefinition Width="*" />
            <ColumnDefinition Width="25" />
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="25" />
            <RowDefinition Height="*" />
            <RowDefinition Height="25" />
        </Grid.RowDefinitions>

        <!-- Top/Left -->
        <DockPanel LastChildFill="False" Grid.Row="0" Grid.Column="0">
            <Thumb DockPanel.Dock="Left" Width="4" Cursor="SizeNWSE" Tag="0" DragDelta="Thumb_DragDelta" />
            <Thumb DockPanel.Dock="Top" Height="4" Cursor="SizeNWSE" Tag="0" DragDelta="Thumb_DragDelta" />
        </DockPanel>

        <!-- Top/Right -->
        <DockPanel LastChildFill="False" Grid.Row="0" Grid.Column="2">
            <Thumb DockPanel.Dock="Right" Width="4" Cursor="SizeNESW" Tag="0" DragDelta="Thumb_DragDelta" />
            <Thumb DockPanel.Dock="Top" Height="4" Cursor="SizeNESW" Tag="0" DragDelta="Thumb_DragDelta" />
        </DockPanel>

        <!-- Bottom/Left -->
        <DockPanel LastChildFill="False" Grid.Row="2" Grid.Column="0">
            <Thumb DockPanel.Dock="Left" Width="4" Cursor="SizeNESW" Tag="1" DragDelta="Thumb_DragDelta" />
            <Thumb DockPanel.Dock="Bottom" Height="4" Cursor="SizeNESW" Tag="1" DragDelta="Thumb_DragDelta" />
        </DockPanel>

        <!-- Bottom/Right -->
        <DockPanel LastChildFill="False" Grid.Row="2" Grid.Column="2">
            <Thumb DockPanel.Dock="Right" Width="4" Cursor="SizeNWSE" Tag="1" DragDelta="Thumb_DragDelta" />
            <Thumb DockPanel.Dock="Bottom" Height="4" Cursor="SizeNWSE" Tag="1" DragDelta="Thumb_DragDelta" />
        </DockPanel>

        <!-- Left -->
        <Thumb Grid.Row="1" Grid.Column="0" Width="4" Cursor="SizeWE" Tag="0" HorizontalAlignment="Left" DragDelta="Thumb_DragDelta" />

        <!-- Top -->
        <Thumb Grid.Row="0" Grid.Column="1" Height="4" Cursor="SizeNS" Tag="0" VerticalAlignment="Top" DragDelta="Thumb_DragDelta" />

        <!-- Right -->
        <Thumb Grid.Row="1" Grid.Column="2" Width="4" Cursor="SizeWE" Tag="1" HorizontalAlignment="Right" DragDelta="Thumb_DragDelta" />

        <!-- Bottom -->
        <Thumb Grid.Row="2" Grid.Column="1" Height="4" Cursor="SizeNS" Tag="1" VerticalAlignment="Bottom" DragDelta="Thumb_DragDelta" />
    </Grid>
</Grid>

主窗口.xaml.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApp1
{
    public partial class MainWindow : Window
    {
        #region --- Declarations ---
        private Rect _location { get; set; }
        #endregion

        #region --- Constructors ---
        public MainWindow()
        {
            InitializeComponent();
        }
        #endregion

        #region --- Properties ---
        private Rect DesktopArea
        {
            get
            {
                var c = System.Windows.Forms.Cursor.Position;
                var s = System.Windows.Forms.Screen.FromPoint(c);
                var a = s.WorkingArea;
                return new Rect(a.Left, a.Top, a.Width, a.Height);
            }
        }
        #endregion

        #region --- Dependency Properties ---
        public static readonly DependencyProperty InternalWindowStateProperty = DependencyProperty.Register("InternalWindowState", typeof(WindowState), typeof(MainWindow), new PropertyMetadata(WindowState.Normal, new PropertyChangedCallback(OnInternalWindowStateChanged)));

        public WindowState InternalWindowState
        {
            get { return (WindowState)GetValue(InternalWindowStateProperty); }
            set { SetValue(InternalWindowStateProperty, value); }
        }

        private static void OnInternalWindowStateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            MainWindow instance = (MainWindow)d;
            instance.SetInternalWindowState((WindowState)e.NewValue);
        }
        #endregion

        #region --- Private Methods ---
        private void StoreLocation()
        {
            _location = new Rect(this.Left, this.Top, this.Width, this.Height);
        }

        private void RestoreLocation()
        {
            this.Width = _location.Width;
            this.Height = _location.Height;
            this.Top = _location.Top >= 0 ? _location.Top : 0;
            this.Left = _location.Left;
        }

        private void SetMaximizedState()
        {
            this.Width = DesktopArea.Width;
            this.Height = DesktopArea.Height;
            this.Top = DesktopArea.Top;
            this.Left = DesktopArea.Left;
        }

        private void SetInternalWindowState(WindowState state)
        {
            InternalWindowState = state;

            switch (InternalWindowState)
            {
                case WindowState.Normal:
                    this.WindowState = WindowState.Normal;
                    RestoreLocation();
                    break;
                case WindowState.Maximized:
                    this.WindowState = WindowState.Normal;
                    SetMaximizedState();
                    break;
                case WindowState.Minimized:
                    this.WindowState = WindowState.Minimized;
                    break;
            }
        }
        #endregion

        #region --- Sizing Routines --- 
        private void Thumb_DragDelta(object sender, System.Windows.Controls.Primitives.DragDeltaEventArgs e)
        {
            Thumb thumb = (Thumb)sender;
            int tag = Convert.ToInt32(thumb.Tag);
            if (thumb.Cursor == Cursors.SizeWE) HandleSizeWE(tag, e);
            if (thumb.Cursor == Cursors.SizeNS) HandleSizeNS(tag, e);
            if (thumb.Cursor == Cursors.SizeNESW) HandleSizeNESW(tag, e);
            if (thumb.Cursor == Cursors.SizeNWSE) HandleSizeNWSE(tag, e);
        }

        private void HandleSizeNWSE(int tag, DragDeltaEventArgs e)
        {
            if (tag == 0)
            {
                this.Top += e.VerticalChange;
                this.Height -= e.VerticalChange;
                this.Left += e.HorizontalChange;
                this.Width -= e.HorizontalChange;
            }
            else
            {
                this.Width += e.HorizontalChange;
                this.Height += e.VerticalChange;
            }
        }

        private void HandleSizeNESW(int tag, DragDeltaEventArgs e)
        {
            if (tag == 0)
            {
                this.Top += e.VerticalChange;
                this.Height -= e.VerticalChange;
                this.Width += e.HorizontalChange;
            }
            else
            {
                this.Left += e.HorizontalChange;
                this.Width -= e.HorizontalChange;
                this.Height += e.VerticalChange;
            }
        }

        private void HandleSizeNS(int tag, DragDeltaEventArgs e)
        {
            if (tag == 0)
            {
                this.Top += e.VerticalChange;
                this.Height -= e.VerticalChange;
            }
            else
                this.Height += e.VerticalChange;
        }

        private void HandleSizeWE(int tag, DragDeltaEventArgs e)
        {
            if (tag == 0)
            {
                this.Left += e.HorizontalChange;
                this.Width -= e.HorizontalChange;
            }
            else
                this.Width += e.HorizontalChange;
        }
        #endregion

        #region --- Event Handlers ---
        private void OnDragMoveWindow(Object sender, MouseButtonEventArgs e)
        {
            if (this.InternalWindowState == WindowState.Maximized)
            {
                var c = System.Windows.Forms.Cursor.Position;
                this.InternalWindowState = WindowState.Normal;
                this.Height = _location.Height;
                this.Width = _location.Width;
                this.Top = c.Y - (titleBar.ActualHeight / 2);
                this.Left = c.X - (_location.Width / 2);
            }
            this.DragMove();
        }

        private void OnMaximizeWindow(Object sender, MouseButtonEventArgs e)
        {
            if (this.InternalWindowState == WindowState.Maximized)
                this.InternalWindowState = WindowState.Normal;
            else
                this.InternalWindowState = WindowState.Maximized;
        }

        private void OnMinimizeWindow(Object sender, MouseButtonEventArgs e)
        {
            this.InternalWindowState = WindowState.Minimized;
        }

        private void OnCloseWindow(Object sender, MouseButtonEventArgs e)
        {
            Application.Current.Shutdown();
        }

        private void Window_StateChanged(object sender, EventArgs e)
        {
            if (this.WindowState == WindowState.Maximized)
            {
                this.InternalWindowState = WindowState.Maximized;
            }
        }

        private void Window_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            if (this.InternalWindowState != WindowState.Maximized)
                StoreLocation();
        }
        #endregion
    }
}