自定义绘制Aero标题栏,无需扩展到客户区

时间:2010-02-22 04:44:47

标签: winforms aero aero-glass

我的WinForms应用程序在Vista / Windows 7上具有标准的Aero玻璃外观。

我想自定义绘制窗口标题栏,以便使用玻璃最小/最大/关闭按钮保留Aero玻璃外观,但没有标题文本和窗口图标。我通过覆盖WM_NCPAINT尝试了这一点,但是重写此事件总是会导致玻璃被移除。

是否有人知道如何使用玻璃覆盖WM_NCPAINT以便有效地正确地绘制玻璃区域?

1 个答案:

答案 0 :(得分:8)

我没有涉及WM_NCPAINT的解决方案,但我有一个解决方案可以完成您希望它执行的操作,并且可能比WM_NCPAINT版本更清晰。

首先定义这个类。您将使用其类型和功能来实现所需的功能:

internal class NonClientRegionAPI
{
    [DllImport( "DwmApi.dll" )]
    public static extern void DwmIsCompositionEnabled( ref bool pfEnabled );

    [StructLayout( LayoutKind.Sequential )]
    public struct WTA_OPTIONS
    {
        public WTNCA dwFlags;
        public WTNCA dwMask;
    }

    [Flags]
    public enum WTNCA : uint
    {
        NODRAWCAPTION = 1,
        NODRAWICON = 2,
        NOSYSMENU = 4,
        NOMIRRORHELP = 8,
        VALIDBITS = NODRAWCAPTION | NODRAWICON | NOSYSMENU | NOMIRRORHELP
    }

    public enum WINDOWTHEMEATTRIBUTETYPE : uint
    {
        /// <summary>Non-client area window attributes will be set.</summary>
        WTA_NONCLIENT = 1,
    }

    [DllImport( "uxtheme.dll" )]
    public static extern int SetWindowThemeAttribute(
        IntPtr hWnd,
        WINDOWTHEMEATTRIBUTETYPE wtype,
        ref WTA_OPTIONS attributes,
        uint size );
}

接下来,在您的表单中,您只需执行此操作:

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();

        // Set your options. We want no icon and no caption.
        SetWindowThemeAttributes( NonClientRegionAPI.WTNCA.NODRAWCAPTION | NonClientRegionAPI.WTNCA.NODRAWICON );
    }

    private void SetWindowThemeAttributes( NonClientRegionAPI.WTNCA attributes )
    {
        // This tests that the OS will support what we want to do. Will be false on Windows XP and earlier,
        // as well as on Vista and 7 with Aero Glass disabled.
        bool hasComposition = false;
        NonClientRegionAPI.DwmIsCompositionEnabled( ref hasComposition );
        if( !hasComposition )
            return;

        NonClientRegionAPI.WTA_OPTIONS options = new NonClientRegionAPI.WTA_OPTIONS();
        options.dwFlags = attributes;
        options.dwMask = NonClientRegionAPI.WTNCA.VALIDBITS;

        // The SetWindowThemeAttribute API call takes care of everything
        NonClientRegionAPI.SetWindowThemeAttribute(
            this.Handle,
            NonClientRegionAPI.WINDOWTHEMEATTRIBUTETYPE.WTA_NONCLIENT,
            ref options,
            (uint)Marshal.SizeOf( typeof( NonClientRegionAPI.WTA_OPTIONS ) ) );
    }
}

结果如下:

http://img708.imageshack.us/img708/1972/noiconnocaptionform.png

我通常使用我所有时髦的扩展行为创建一个实现Form的基类,然后让我的实际表单实现该基类,但如果你只需要一个Form,那就把它全部放在那里。