[英]WPF glass window with no border and no resize out of focus
I am trying to create a Aero glass borderless and non-resizable WPF window using the DwmEnableBlurBehindWindow
method from the DmwAPI
. 我正在尝试使用
DmwAPI
的DwmEnableBlurBehindWindow
方法创建一个Aero glass 无边框 且不可调整大小的 WPF窗口。 However, for some strange reason the glass color of this window appears as if the window is out of focus . 但是,由于某些奇怪的原因,此窗口的玻璃颜色看起来好像窗口没有焦点 。 As you can see in the next three images, the normal windows with borders ( eg figure 1 and 2 ) work just fine and react as expected (dark blue in focus, whitish when out of focus (= non active)).
正如您在接下来的三张图片中看到的那样,带有边框的正常窗口( 例如图1和图2 )工作得很好并且按预期做出反应(焦点为深蓝色,失焦时为白色(=非活动))。
The borderless window with resizing allowed, shows the same behavior: 允许调整大小的无边框窗口显示相同的行为:
The non-resizable borderless window however will always look as if it is out of focus (as you can see in the last figure 3 ) both when it is active and non-active. 然而, 不可调整大小的无边界窗口在它处于活动状态和非活动状态时总是看起来好像没有聚焦(如上图3所示 )。 It always looks whitish:
它总是看起来发白:
This is some example code of how I set the glass style: 这是我如何设置玻璃样式的一些示例代码:
public MainWindow()
{
InitializeComponent();
WindowStyle = WindowStyle.None;
ResizeMode = ResizeMode.NoResize;
Height = 200;
Background = Brushes.Transparent;
Loaded += MainWindow_Loaded;
}
void MainWindow_Loaded(object sender, RoutedEventArgs e)
{
var windowInteropHelper = new WindowInteropHelper(this);
var handle = windowInteropHelper.Handle;
var mainWindowSrc = HwndSource.FromHwnd(handle);
if (mainWindowSrc != null)
if (mainWindowSrc.CompositionTarget != null)
mainWindowSrc.CompositionTarget.BackgroundColor = Color.FromArgb(0, 0, 0, 0);
var glassParams = new DwmApi.DwmBlurbehind
{
dwFlags = DwmApi.DwmBlurbehind.DWM_BB_ENABLE,
fEnable = true,
hRegionBlur = IntPtr.Zero
};
IntPtr dis = new IntPtr(2);
DwmApi.DwmSetWindowAttribute(mainWindowSrc.Handle,
DwmApi.DwmWindowAttribute.DWMWA_LAST,
dis,
sizeof(uint));
DwmApi.DwmEnableBlurBehindWindow(
handle,
glassParams
);
}
I tried focusing the window, but that doesn't seem to affect the behavior. 我试着聚焦窗口,但这似乎并没有影响行为。 Any ideas or pointers on how to solve this?
关于如何解决这个问题的任何想法或指示?
I haven't worked much in dwm apis so I may be wrong but I think the default dwm rendering policy is using WindowStyle to figure out rendering. 我在dwm apis中工作不多,所以我可能错了,但我认为默认的dwm渲染策略是使用WindowStyle来计算渲染。 If you disable that policy, it behaves as you'd expect it to.
如果您禁用该策略,它的行为与您期望的一样。
Add the following bit to fix your blues xD 添加以下位来修复你的蓝调xD
const int DWMWA_NCRENDERING_POLICY = 2;
int DWMNCRP_DISABLED = 2;
DwmSetWindowAttribute(hwnd, DWMWA_NCRENDERING_POLICY, ref DWMNCRP_DISABLED, sizeof(int));
For details of this voodoo, please check the following resources: 有关此伏都教的详细信息,请查看以下资源:
DwmSetWindowAttribute function DwmSetWindowAttribute函数
DWMWINDOWATTRIBUTE enumeration DWMWINDOWATTRIBUTE枚举
MainWindow.xaml MainWindow.xaml
<Window x:Class="dwm.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525"/>
MainWindow.xaml.cs MainWindow.xaml.cs
using System;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Interop;
using System.Windows.Media;
namespace dwm
{
public partial class MainWindow
{
[DllImport("dwmapi.dll", PreserveSig = false)]
public static extern void DwmEnableBlurBehindWindow(IntPtr hwnd, ref DwmBlurbehind blurBehind);
[DllImport("dwmapi.dll", PreserveSig = true)]
private static extern int DwmSetWindowAttribute(IntPtr hwnd, int attr, ref int attrValue, int attrSize);
public MainWindow()
{
InitializeComponent();
}
protected override void OnSourceInitialized(EventArgs e)
{
base.OnSourceInitialized(e);
var bb = new DwmBlurbehind
{
dwFlags = CoreNativeMethods.DwmBlurBehindDwFlags.DwmBbEnable,
Enabled = true
};
WindowStartupLocation = WindowStartupLocation.CenterScreen;
Background = Brushes.Transparent;
ResizeMode = ResizeMode.NoResize;
WindowStyle = WindowStyle.None;
Focus();
var hwnd = new WindowInteropHelper(this).Handle;
HwndSource.FromHwnd(hwnd).CompositionTarget.BackgroundColor = Colors.Transparent;
DwmEnableBlurBehindWindow(hwnd, ref bb);
const int dwmwaNcrenderingPolicy = 2;
var dwmncrpDisabled = 2;
DwmSetWindowAttribute(hwnd, dwmwaNcrenderingPolicy, ref dwmncrpDisabled, sizeof(int));
}
[StructLayout(LayoutKind.Sequential)]
public struct DwmBlurbehind
{
public CoreNativeMethods.DwmBlurBehindDwFlags dwFlags;
public bool Enabled;
public IntPtr BlurRegion;
public bool TransitionOnMaximized;
}
public static class CoreNativeMethods
{
public enum DwmBlurBehindDwFlags
{
DwmBbEnable = 1,
DwmBbBlurRegion = 2,
DwmBbTransitionOnMaximized = 4
}
}
}
}
Screenshot with focus 屏幕截图有焦点
Screenshot without focus 没有焦点的截图
Test Environment 测试环境
OS: Windows 8 - x64 操作系统:Windows 8 - x64
Theme: Standard windows 主题:标准窗户
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