When system-wide dark mode is detected, sets the UseImmersiveDarkMode…

… to make the title bar darj.
FelisDiligens · Mar 9, 2023 · c108657 · c108657
1 parent 38b8af5
commit c108657
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Showing 3 changed files with 67 additions and 1 deletion.
diff --git a/Fo76ini/Forms/FormMain/FormMain.cs b/Fo76ini/Forms/FormMain/FormMain.cs
@@ -16,6 +16,7 @@
 using System.IO;
 using System.Linq;
 using System.Net;
+using System.Runtime.InteropServices;
 using System.Text;
 using System.Text.RegularExpressions;
 using System.Windows.Forms;
@@ -119,6 +120,21 @@ public FormMain()
             Utils.PreventChangeOnMouseWheelForAllElements(this);
 
             this.userControlSideNav.SelectedTabIndex = 0;
+
+            // Set dark mode
+            if (Theming.DetectSystemTheme() == ThemeType.Dark)
+            {
+                int t = 1; // true
+                IntPtr hWnd = this.Handle;
+                try
+                {
+                    Utils.DwmSetWindowAttribute(hWnd, Utils.DwmWindowAttribute.UseImmersiveDarkMode, ref t, Marshal.SizeOf(t));
+                }
+                catch (System.EntryPointNotFoundException ex)
+                {
+                    Console.WriteLine("Couldn't call DwmSetWindowAttribute: " + ex.Message);
+                }
+            }
         }
 
         private void FormMain_Load(object sender, EventArgs e)

diff --git a/Fo76ini/Forms/FormMods/FormMods.cs b/Fo76ini/Forms/FormMods/FormMods.cs
@@ -15,6 +15,7 @@
 using System.Threading;
 using System.Windows.Forms;
 using static Fo76ini.Utilities.Archive2;
+using System.Runtime.InteropServices;
 
 namespace Fo76ini
 {
@@ -68,6 +69,22 @@ public FormMods()
 
             this.FormClosing += this.FormMods_FormClosing;
             this.KeyDown += this.FormMods_KeyDown;
+
+            // Set dark mode
+            if (Theming.DetectSystemTheme() == ThemeType.Dark)
+            {
+                int t = 1; // true
+                IntPtr hWnd = this.Handle;
+                try
+                {
+                    Utils.DwmSetWindowAttribute(hWnd, Utils.DwmWindowAttribute.UseImmersiveDarkMode, ref t, Marshal.SizeOf(t));
+                }
+                catch (System.EntryPointNotFoundException ex)
+                {
+                    Console.WriteLine("Couldn't call DwmSetWindowAttribute: " + ex.Message);
+                }
+            }
+
         }
 
         private void OnProfileChanged(object sender, ProfileEventArgs e)

diff --git a/Fo76ini/Utilities/Utils.cs b/Fo76ini/Utilities/Utils.cs
@@ -390,13 +390,46 @@ public static bool IsDirectoryEmpty(string path)
             return !Directory.EnumerateFileSystemEntries(path).Any();
         }
 
+        /* https://www.pinvoke.net/default.aspx/Enums/DWMWINDOWATTRIBUTE.html */
+        public enum DwmWindowAttribute : uint
+        {
+            NCRenderingEnabled = 1,
+            NCRenderingPolicy,
+            TransitionsForceDisabled,
+            AllowNCPaint,
+            CaptionButtonBounds,
+            NonClientRtlLayout,
+            ForceIconicRepresentation,
+            Flip3DPolicy,
+            ExtendedFrameBounds,
+            HasIconicBitmap,
+            DisallowPeek,
+            ExcludedFromPeek,
+            Cloak,
+            Cloaked,
+            FreezeRepresentation,
+            PassiveUpdateMode,
+            UseHostBackdropBrush,
+            UseImmersiveDarkMode = 20,
+            WindowCornerPreference = 33,
+            BorderColor,
+            CaptionColor,
+            TextColor,
+            VisibleFrameBorderThickness,
+            SystemBackdropType,
+            Last
+        }
+
+        /* https://pinvoke.net/default.aspx/Enums/DwmSetWindowAttribute.html?diff=y */
+        [DllImport("dwmapi.dll", PreserveSig = true)]
+        public static extern int DwmSetWindowAttribute(IntPtr hwnd, DwmWindowAttribute attr, ref int attrValue, int attrSize);
+
         /*
          * EnumDisplaySettings
          * https://www.reddit.com/r/csharp/comments/31yw0t/how_can_i_get_the_main_monitors_refresh_rate/
          * https://stackoverflow.com/questions/744541/how-to-list-available-video-modes-using-c/744609#744609
          * https://docs.microsoft.com/de-de/windows/win32/api/winuser/nf-winuser-enumdisplaysettingsa?redirectedfrom=MSDN
          */
-
         [DllImport("user32.dll")]
         private static extern bool EnumDisplaySettings(
               string deviceName, int modeNum, ref DEVMODE devMode);