Update: Get dpi from AppModel

Author: XTorLukas

src/Files.App.CsWin32/NativeMethods.txt

@@ -160,5 +160,3 @@ IApplicationDocumentLists
 ApplicationDocumentLists
 IApplicationActivationManager
 MENU_ITEM_TYPE
-GetDpiForMonitor
-MonitorFromWindow

src/Files.App/Helpers/Win32/Win32PInvoke.Consts.cs

@@ -67,7 +67,5 @@ public static partial class Win32PInvoke
 		public const string LOCALE_NAME_USER_DEFAULT = null;
 		public const string LOCALE_NAME_INVARIANT = "";
 		public const string LOCALE_NAME_SYSTEM_DEFAULT = "!sys-default-locale";
-
-		public const int USER_DEFAULT_SCREEN_DPI = 96;
 	}
 }

src/Files.App/MainWindow.xaml.cs

@@ -9,9 +9,6 @@
 using System.Runtime.InteropServices;
 using Windows.ApplicationModel.Activation;
 using Windows.Storage;
-using Windows.Win32;
-using Windows.Win32.Graphics.Gdi;
-using Windows.Win32.UI.HiDpi;
 using IO = System.IO;
 
 namespace Files.App
@@ -342,15 +339,5 @@ x.tabItem.NavigationParameter.NavigationParameter is PaneNavigationArguments pan
 				}
 			}
 		}
-
-		public double GetDpiScale()
-		{
-			var hMonitor = PInvoke.MonitorFromWindow(
-				new(WinRT.Interop.WindowNative.GetWindowHandle(this)),
-				MONITOR_FROM_FLAGS.MONITOR_DEFAULTTONEAREST);
-
-			var res = PInvoke.GetDpiForMonitor(hMonitor, MONITOR_DPI_TYPE.MDT_EFFECTIVE_DPI, out var dpiX, out var _);
-			return res == 0 ? ((float)dpiX / Win32PInvoke.USER_DEFAULT_SCREEN_DPI) : 1;
-		}
 	}
 }

src/Files.App/UserControls/TabBar/TabBar.xaml.cs

@@ -60,7 +60,7 @@ public Rectangle DragArea
 		public GridLength TitleBarWidth
 		{
 			get => _titleBarWidth;
-			set => _titleBarWidth = new((value.Value / MainWindow.Instance.GetDpiScale()) + _gap);
+			set => _titleBarWidth = new((value.Value / App.AppModel.AppWindowDPI) + _gap);
 		}
 
 		// Events