我正在使用WPF Shell集成库(http://archive.msdn.microsoft.com/WPFShell)但是当我在Aero中使用自定义chrome时,标题栏将被删除。
我知道我需要使用DrawThemeTextEx函数来重新绘制窗口标题,但是我找不到任何执行此操作的C#示例。我找到了Custom Window Frame using DWM (Windows)的指南,详细说明了标题标题的绘画。
我不确定(我没有使用pinvoke的经验)如何在C#中执行此操作以便使用正确的系统字体等。是否有人能够提供可以集成到WPF Shell集成库中的C#示例?
更新#1:我在Windows窗体项目中尝试过此代码,它运行正常。我注意到,如果我将表单从屏幕上移开,Windows窗体将丢失标题文本。所以我认为这个问题可能与此有关。我尝试在OnRender事件中绘制标题文本,但这并不能解决问题。
我已将以下代码添加到WindowChromeWorker.cs:
private void _DrawCustomTitle(IntPtr hwnd)
{
if (NativeMethods.DwmIsCompositionEnabled())
{
Standard.RECT rcClient = new Standard.RECT();
NativeMethods.GetClientRect(hwnd, ref rcClient);
Standard.RECT rcPaint = rcClient;
rcPaint.Top += 8;
rcPaint.Right -= 125;
rcPaint.Left += 8;
rcPaint.Bottom = 50;
IntPtr destdc = NativeMethods.GetDC(hwnd);
IntPtr Memdc = NativeMethods.CreateCompatibleDC(destdc); // Set up a memory DC where we'll draw the text.
IntPtr bitmap;
IntPtr bitmapOld = IntPtr.Zero;
IntPtr logFont;
uint uFormat = NativeMethods.DT_SINGLELINE | NativeMethods.DT_TOP | NativeMethods.DT_LEFT | NativeMethods.DT_WORD_ELLIPSIS;
BITMAPINFO dib = new BITMAPINFO();
dib.bmiHeader.biHeight = -(rcClient.Bottom - rcClient.Top); // negative because DrawThemeTextEx() uses a top-down DIB
dib.bmiHeader.biWidth = rcClient.Right - rcClient.Left;
dib.bmiHeader.biPlanes = 1;
dib.bmiHeader.biSize = Marshal.SizeOf(typeof(BITMAPINFOHEADER));
dib.bmiHeader.biBitCount = 32;
dib.bmiHeader.biCompression = NativeMethods.BI_RGB;
if (!(NativeMethods.SaveDC(Memdc) == 0))
{
bitmap = NativeMethods.CreateDIBSection(Memdc, ref dib, NativeMethods.DIB_RGB_COLORS, 0, IntPtr.Zero, 0); // Create a 32-bit bmp for use in offscreen drawing when glass is on
if (!(bitmap == IntPtr.Zero))
{
bitmapOld = NativeMethods.SelectObject(Memdc, bitmap);
System.Drawing.Font font = new System.Drawing.Font("Segoe UI", 9f);
IntPtr hFont = font.ToHfont();
logFont = NativeMethods.SelectObject(Memdc, hFont);
try
{
System.Windows.Forms.VisualStyles.VisualStyleRenderer renderer = new System.Windows.Forms.VisualStyles.VisualStyleRenderer(System.Windows.Forms.VisualStyles.VisualStyleElement.Window.Caption.Active);
NativeMethods.DTTOPTS dttOpts = new NativeMethods.DTTOPTS();
dttOpts.dwSize = (int)Marshal.SizeOf(typeof(NativeMethods.DTTOPTS));
dttOpts.dwFlags = NativeMethods.DTT_COMPOSITED | NativeMethods.DTT_GLOWSIZE;
dttOpts.iGlowSize = 15;
string title = "Windows Title";
NativeMethods.DrawThemeTextEx(renderer.Handle, Memdc, 0, 0, title, -1, uFormat, ref rcPaint, ref dttOpts);
NativeMethods.BitBlt(destdc, rcClient.Left, rcClient.Top, rcClient.Right - rcClient.Left, rcClient.Bottom - rcClient.Top, Memdc, 0, 0, NativeMethods.SRCCOPY);
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.Message);
}
// Clean Up
NativeMethods.SelectObject(Memdc, bitmapOld);
NativeMethods.SelectObject(Memdc, logFont);
NativeMethods.DeleteObject(bitmap);
NativeMethods.DeleteObject(hFont);
NativeMethods.ReleaseDC(Memdc, -1);
NativeMethods.DeleteDC(Memdc);
}
}
}
}
然后在扩展DWM玻璃后,我在以下函数中调用DrawCustomTitle。知道为什么这不起作用。
private void _ExtendGlassFrame()
{
Assert.IsNotNull(_window);
// Expect that this might be called on OSes other than Vista.
if (!Utility.IsOSVistaOrNewer)
{
// Not an error. Just not on Vista so we're not going to get glass.
return;
}
if (IntPtr.Zero == _hwnd)
{
// Can't do anything with this call until the Window has been shown.
return;
}
// Ensure standard HWND background painting when DWM isn't enabled.
if (!NativeMethods.DwmIsCompositionEnabled())
{
_hwndSource.CompositionTarget.BackgroundColor = SystemColors.WindowColor;
}
else
{
// This makes the glass visible at a Win32 level so long as nothing else is covering it.
// The Window's Background needs to be changed independent of this.
// Apply the transparent background to the HWND
_hwndSource.CompositionTarget.BackgroundColor = Colors.Transparent;
// Thickness is going to be DIPs, need to convert to system coordinates.
Point deviceTopLeft = DpiHelper.LogicalPixelsToDevice(new Point(_chromeInfo.GlassFrameThickness.Left, _chromeInfo.GlassFrameThickness.Top));
Point deviceBottomRight = DpiHelper.LogicalPixelsToDevice(new Point(_chromeInfo.GlassFrameThickness.Right, _chromeInfo.GlassFrameThickness.Bottom));
var dwmMargin = new MARGINS
{
// err on the side of pushing in glass an extra pixel.
cxLeftWidth = (int)Math.Ceiling(deviceTopLeft.X),
cxRightWidth = (int)Math.Ceiling(deviceBottomRight.X),
cyTopHeight = (int)Math.Ceiling(deviceTopLeft.Y),
cyBottomHeight = (int)Math.Ceiling(deviceBottomRight.Y),
};
NativeMethods.DwmExtendFrameIntoClientArea(_hwnd, ref dwmMargin);
this._DrawCustomTitle(_hwnd);
}
}
答案 0 :(得分:0)
你不应该经历所有这些麻烦。看看下面的代码示例。带Text={TemplateBinding Title}
的标签可以满足您的需求。
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:shell="clr-namespace:Microsoft.Windows.Shell;assembly=Microsoft.Windows.Shell"
Title="MainWindow" Height="350" Width="525">
<Window.Style>
<Style TargetType="Window">
<Setter Property="shell:WindowChrome.WindowChrome">
<Setter.Value>
<shell:WindowChrome GlassFrameThickness="4,40,4,4" ResizeBorderThickness="5" CaptionHeight="30"/>
</Setter.Value>
</Setter>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Window">
<Grid x:Name="PART_ComponentRoot">
<Grid.RowDefinitions>
<RowDefinition Height="40"/>
<RowDefinition/>
<RowDefinition Height="4"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="4"/>
<ColumnDefinition/>
<ColumnDefinition Width="4"/>
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="1" Text="{TemplateBinding Title}"
HorizontalAlignment="Center" VerticalAlignment="Center"/>
<ContentPresenter Grid.Row="1" Grid.Column="1" Content="{TemplateBinding Content}"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Window.Style>
<Grid Background="White">
</Grid>
答案 1 :(得分:0)
它可能无法正常工作的原因通常被称为“空域”问题。基本上你正在使用的代码是用GDI渲染像素,WPF是用DirectX实现的,而这两种渲染技术不知道如何共享像素。可能还会发生一些更微妙的事情,但乍一看我怀疑是这样。
你想在WPF中这样做的方式类似于Mranz之前的建议。使用WPF有几种简单的方法可以获得模糊效果:
直接在彼此的顶部创建两个文本块(例如,在占据相同单元格的网格中),使用相同的字体和文本等,但是使底部文本块具有您想要发光的颜色然后对它应用模糊效果。你需要注意的是,没有效果它们会以相同的方式渲染,或者模糊将会消失。
创建一个椭圆或边缘带有椭圆的矩形,并使用标题将其放在带有标题的文本块后面,然后对其进行模糊效果。
这也有点棘手,因为Windows在Vista和7之间改变了一些这些行为(我不知道8最终会是什么样子)。如果我没记错的话,在Vista中最大化窗口时,模糊效果会消失,字体颜色会变白。在7中不再发生。至少在8(和Office 2010)的开发人员预览中,标题文本现在居中。此外,当你自己这样做时,你需要注意不要遮盖字幕按钮,因为它可能不会在你期望的地方开始剪切文本。
如果您遇到任何一种方法的问题,请随时ping我。我可以把一些示例代码放在一起,但我没有方便的样式。此外,如果你解决它,请发布你的解决方案,以便其他人可以受益:)
希望有所帮助,