193 lines
7.6 KiB
C#
193 lines
7.6 KiB
C#
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/* This Source Code is partially based on reverse engineering of the Windows Operating System,
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and is intended for use on Windows systems only.
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This Source Code is partially based on the source code provided by the .NET Foundation.
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NOTE:
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I split unmanaged code stuff into the NativeMethods library.
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If you have suggestions for the code below, please submit your changes there.
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https://github.com/lepoco/nativemethods */
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using System.Runtime.InteropServices;
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using System.Text;
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namespace WPFluent.Interop;
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// ReSharper disable IdentifierTypo
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// ReSharper disable InconsistentNaming
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#pragma warning disable SA1307 // Accessible fields should begin with upper-case letter
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#pragma warning disable CA1060 // Move pinvokes to native methods class
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internal static class UxTheme
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{
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/// <summary>
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/// Retrieves the name of the current visual style, and optionally retrieves the color scheme name and size name.
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/// </summary>
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/// <param name="pszThemeFileName">Pointer to a string that receives the theme path and file name.</param>
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/// <param name="dwMaxNameChars">Value of type int that contains the maximum number of characters allowed in the theme file name.</param>
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/// <param name="pszColorBuff">Pointer to a string that receives the color scheme name. This parameter may be set to NULL.</param>
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/// <param name="cchMaxColorChars">Value of type int that contains the maximum number of characters allowed in the color scheme name.</param>
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/// <param name="pszSizeBuff">Pointer to a string that receives the size name. This parameter may be set to NULL.</param>
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/// <param name="cchMaxSizeChars">Value of type int that contains the maximum number of characters allowed in the size name.</param>
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/// <returns>HRESULT</returns>
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[DllImport(Libraries.UxTheme, CharSet = CharSet.Unicode)]
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public static extern int GetCurrentThemeName(
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[Out] StringBuilder pszThemeFileName,
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[In] int dwMaxNameChars,
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[Out] StringBuilder pszColorBuff,
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[In] int cchMaxColorChars,
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[Out] StringBuilder pszSizeBuff,
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[In] int cchMaxSizeChars);
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[DllImport("uxtheme.dll", EntryPoint = "#132", SetLastError = true, CharSet = CharSet.Unicode)]
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public static extern bool ShouldAppsUseDarkMode();
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[DllImport("uxtheme.dll", EntryPoint = "#136", SetLastError = true, CharSet = CharSet.Unicode)]
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public static extern void FlushMenuThemes();
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[DllImport("uxtheme.dll", EntryPoint = "#138", SetLastError = true, CharSet = CharSet.Unicode)]
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public static extern bool ShouldSystemUseDarkMode();
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public enum PreferredAppMode : int { Default, AllowDark, ForceDark, ForceLight, Max };
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/// <summary>
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/// Windows 10 1903, aka 18362, broke the API.
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/// - Before 18362, the #135 is AllowDarkModeForApp(BOOL)
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/// - After 18362, the #135 is SetPreferredAppMode(PreferredAppMode)
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/// Since the support for AllowDarkModeForApp is uncertain, it will not be considered for use.
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/// </summary>
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[DllImport("uxtheme.dll", EntryPoint = "#135", SetLastError = true, CharSet = CharSet.Unicode)]
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public static extern int SetPreferredAppMode(PreferredAppMode preferredAppMode);
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/// <summary>
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/// Tests if a visual style for the current application is active.
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/// </summary>
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/// <returns>
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/// <see langword="true"/> if a visual style is enabled, and windows with visual styles applied should call
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/// OpenThemeData to start using theme drawing services.
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/// </returns>
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[DllImport(Libraries.UxTheme)]
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[return: MarshalAs(UnmanagedType.Bool)]
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public static extern bool IsThemeActive();
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/// <summary>
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/// Sets attributes to control how visual styles are applied to a specified window.
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/// </summary>
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/// <param name="hWnd">
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/// Handle to a window to apply changes to.
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/// </param>
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/// <param name="eAttribute">
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/// Value of type WINDOWTHEMEATTRIBUTETYPE that specifies the type of attribute to set. The value of this parameter
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/// determines the type of data that should be passed in the pvAttribute parameter. Can be the following value:
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/// <list>WTA_NONCLIENT (Specifies non-client related attributes).</list> pvAttribute must be a pointer of type
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/// WTA_OPTIONS.
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/// </param>
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/// <param name="pvAttribute">
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/// A pointer that specifies attributes to set. Type is determined by the value of the eAttribute value.
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/// </param>
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/// <param name="cbAttribute">
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/// Specifies the size, in bytes, of the data pointed to by pvAttribute.
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/// </param>
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[DllImport(Libraries.UxTheme, PreserveSig = false)]
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public static extern void SetWindowThemeAttribute(
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[In] IntPtr hWnd,
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[In] WINDOWTHEMEATTRIBUTETYPE eAttribute,
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[In] ref WTA_OPTIONS pvAttribute,
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[In] uint cbAttribute);
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/// <summary>
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/// Returned by the GetThemeMargins function to define the margins of windows that have visual styles applied.
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/// </summary>
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public struct MARGINS
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{
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/// <summary>
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/// Width of left border that retains its size.
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/// </summary>
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public int cxLeftWidth;
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/// <summary>
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/// Width of right border that retains its size.
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/// </summary>
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public int cxRightWidth;
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/// <summary>
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/// Height of top border that retains its size.
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/// </summary>
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public int cyTopHeight;
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/// <summary>
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/// Height of bottom border that retains its size.
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/// </summary>
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public int cyBottomHeight;
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}
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/// <summary>
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/// Specifies the type of visual style attribute to set on a window.
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/// </summary>
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public enum WINDOWTHEMEATTRIBUTETYPE : uint
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{
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/// <summary>
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/// Non-client area window attributes will be set.
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/// </summary>
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WTA_NONCLIENT = 1,
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}
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/// <summary>
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/// WindowThemeNonClientAttributes
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/// </summary>
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[Flags]
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public enum WTNCA : uint
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{
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/// <summary>
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/// Prevents the window caption from being drawn.
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/// </summary>
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NODRAWCAPTION = 0x00000001,
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/// <summary>
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/// Prevents the system icon from being drawn.
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/// </summary>
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NODRAWICON = 0x00000002,
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/// <summary>
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/// Prevents the system icon menu from appearing.
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/// </summary>
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NOSYSMENU = 0x00000004,
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/// <summary>
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/// Prevents mirroring of the question mark, even in right-to-left (RTL) layout.
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/// </summary>
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NOMIRRORHELP = 0x00000008,
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/// <summary>
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/// A mask that contains all the valid bits.
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/// </summary>
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VALIDBITS = NODRAWCAPTION | NODRAWICON | NOMIRRORHELP | NOSYSMENU,
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}
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/// <summary>
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/// Defines options that are used to set window visual style attributes.
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/// </summary>
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[StructLayout(LayoutKind.Explicit)]
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public struct WTA_OPTIONS
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{
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/// <summary>
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/// A combination of flags that modify window visual style attributes. Can be a combination of the WTNCA
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/// constants.
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/// </summary>
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[FieldOffset(0)]
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public WTNCA dwFlags;
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/// <summary>
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/// A bitmask that describes how the values specified in dwFlags should be applied. If the bit corresponding to
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/// a value in dwFlags is 0, that flag will be removed. If the bit is 1, the flag will be added.
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/// </summary>
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[FieldOffset(4)]
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public WTNCA dwMask;
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// public static readonly uint Size = (uint)Marshal.SizeOf(typeof(WTA_OPTIONS));
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public const uint Size = 8;
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}
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}
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#pragma warning restore SA1307 // Accessible fields should begin with upper-case letter
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#pragma warning restore CA1060 // Move pinvokes to native methods class
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