c# - 防止WPF窗口闪烁

Question

我有一个无边框 WPF 窗口，需要能够隐藏其控件之一并同时缩小窗口。

问题是它看起来很糟糕。

这是我现在正在做的:

private void btnShowHideTopBar_Click(object sender, RoutedEventArgs e)
{
    if (commandTopHide == true)
    {
        txtblkShowHideTopBar.Text = "Show Top Bar";
        commandTopHide = false;
        myWindow.Left = 1100;
        myWindow.Width = 180;
        RSide.Width = new GridLength(0, GridUnitType.Pixel);
    }
    else if (commandTopHide == false)
    {
        txtblkShowHideTopBar.Text = "Hide Top Bar";
        commandTopHide = true;
        myWindow.Left = 1030;
        myWindow.Width = 250;
        RSide.Width = new GridLength(70, GridUnitType.Pixel);
    }
}

这是慢动作的样子:

为了纠正这个问题，我尝试了一些方法。其中每一个显然都只适用于 Winforms。
比如我关注了this blog post at Bee Eee禁用绘图和“锁定窗口更新”无济于事。

我还尝试覆盖 WM_PAINT 消息 as seen in this post但是一旦我收到消息，我就会陷入困境。 base.WndProc(ref msg); 行抛出错误“‘System.Windows.Window’不包含‘WndProc’的定义”

当然，该代码适用于 Winforms，我正在使用 hwndSource.AddHook 方法，如 How to handle WndProc messages in WPF? 中所述。 )...

---

由于我的自定义按钮，我的 xaml 相当庞大，所以我将忽略它。这是剩下的:

<Window x:Name="myWindow" x:Class="myNamespace.myWindowClass"
    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" mc:Ignorable="d"
    Title="WiMan" Height="210" Width="250" ResizeMode="NoResize" WindowStyle="None" MinWidth="180" 
    MinHeight="210" MaxWidth="250" MaxHeight="210" Left="1030" Top="66" Loaded="ControlBoxLoadEvent" 
    Icon="pack://siteoforigin:,,,/Resources/App.ico" Closing="MainWindowIsClosing" Foreground="White" 
    Background="{x:Null}" AllowsTransparency="True">
<Window.Resources>
    <ControlTemplate ...stuff I left out.. > lots of stuff... </ControlTemplate>
</Window.Resources>
<Grid x:Name="MainWindowGrid" RenderTransformOrigin="0.5,0.5">
    <Grid.Background>
        <LinearGradientBrush EndPoint="160,240" StartPoint="160,-20" MappingMode="Absolute">
            <LinearGradientBrush.RelativeTransform>
                <TransformGroup>
                    <ScaleTransform CenterY="0.5" CenterX="0.5" ScaleY="1" ScaleX="1"/>
                    <SkewTransform AngleY="0" AngleX="0" CenterY="0.5" CenterX="0.5"/>
                    <RotateTransform Angle="-4.764" CenterY="0.5" CenterX="0.5"/>
                    <TranslateTransform/>
                </TransformGroup>
            </LinearGradientBrush.RelativeTransform>
            <GradientStop Color="#FF1B1B1B" Offset="1"/>
            <GradientStop Color="#7FC3C3C3"/>
        </LinearGradientBrush>
    </Grid.Background>
    <Grid.RowDefinitions>
        <RowDefinition/>
        <RowDefinition/>
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Name="RSide" Width="70"/>
        <ColumnDefinition Width="84*"/>
        <ColumnDefinition Width="83*"/>
    </Grid.ColumnDefinitions>
    <Button x:Name="btnShowHideTopBar" FontFamily="Arial Rounded MT Bold" FontSize="18" Click="btnShowHideTopBar_Click" 
      Template="...the stuff I left out..." Foreground="White" Background="{x:Null}" BorderBrush="{x:Null}" Margin="2" Grid.Row="1" Grid.Column="1">
        <TextBlock x:Name="txtblkShowHideTopBar" TextWrapping="Wrap" Text="Hide Topbar" TextAlignment="Center"/>
    </Button>
    <Button x:Name="btnShowHideSideBar" Grid.Column="2" Grid.Row="1" FontFamily="Arial Rounded MT Bold" FontSize="18" Click="eventHideShowSideBar_Click" 
     Template="...the stuff I left out..." Foreground="White" Background="{x:Null}" BorderBrush="{x:Null}" Margin="2">
        <TextBlock x:Name="txtblkShowHideSideBar" TextWrapping="Wrap" Text="Hide Sidebar" TextAlignment="Center"/>
    </Button>
    <Button Content="Configure" Click="btnConfigure_Click" FontFamily="Arial Rounded MT Bold" FontSize="18" 
     Template="...the stuff I left out..." Foreground="White" Background="{x:Null}" BorderBrush="{x:Null}" Margin="2" Grid.ColumnSpan="2" Grid.Column="1"/>
    <Grid Grid.RowSpan="2">
        <Grid.Background>
            <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                <GradientStop Color="#FF3C8AE8" Offset="0"/>
                <GradientStop Color="#FF032440" Offset="1"/>
            </LinearGradientBrush>
        </Grid.Background>
    </Grid>
    <Button x:Name="btnScrollLeft" Content="R Side" Click="RSideScrollButton_Click" FontFamily="Arial Rounded MT Bold" FontSize="18" 
      Template="...the stuff I left out..." Foreground="White" Background="{x:Null}" BorderBrush="{x:Null}" Margin="3,2,3,3" Grid.RowSpan="2"/>
</Grid>

@Walt Ritscher，我不知道“隐藏”列，我只是将它的宽度设置为 0。但更大的问题似乎是我需要调整包含它的窗口的大小和位置。

---

@ErnodeWeerd，我已经实现了一个秒表，你可以在这里看到:

    Stopwatch s = new Stopwatch();
    string a; string b; string c; 

    s.Start();
    myWindow.Left = 1100;
    s.Stop(); a = s.Elapsed.ToString(); s.Reset();

    s.Start();
    myWindow.Width = 180;
    s.Stop(); b = s.Elapsed.ToString(); s.Reset();

    s.Start();
    RSide.Width = new GridLength(0, GridUnitType.Pixel);
    s.Stop(); c = s.Elapsed.ToString(); s.Reset();

    MessageBox.Show(a + Environment.NewLine +
            b + Environment.NewLine +
            c + Environment.NewLine);

这是结果:

Answer 1

您可以使用带网格的透明窗口 (AllowTransparency = True)，然后当您的控件需要隐藏时，您可以将控件的可见性设置为折叠。不会有闪烁，也不会移动窗口，但那里也不会有任何东西，所以你会看到 throug，就好像你已经调整了大小，移动了你的窗口。