Fixed force16color logic

Terminal.Gui/Drawing/Color.cs

@@ -253,7 +253,7 @@ namespace Terminal.Gui {
 		/// Gets or sets the <see cref="Color"/> using a legacy 16-color <see cref="ColorNames"/> value.
 		/// </summary>
 		/// <remarks>
-		/// Get returns the closest 24-bit color value. Set sets the RGB value using a hard-coded map.
+		/// Get returns the <see cref="ColorName"/> of the closest 24-bit color value. Set sets the RGB value using a hard-coded map.
 		/// </remarks>
 		public ColorNames ColorName {
 			get => FindClosestColor (this.Value);

UICatalog/Scenarios/Images.cs

@@ -38,10 +38,10 @@ namespace UICatalog.Scenarios {
 			var cbUseTrueColor = new CheckBox ("Use true color") {
 				X = x,
 				Y = y++,
-				Checked = Application.Driver.Force16Colors,
+				Checked = !Application.Driver.Force16Colors,
 				Enabled = canTrueColor,
 			};
-			cbUseTrueColor.Toggled += (_, evt) => Application.Driver.Force16Colors = evt.NewValue ?? false;
+			cbUseTrueColor.Toggled += (_, evt) => Application.Driver.Force16Colors = !evt.NewValue ?? false;
 			Win.Add (cbUseTrueColor);
 
 			var btnOpenImage = new Button ("Open Image") {
@@ -60,11 +60,16 @@ namespace UICatalog.Scenarios {
 
 
 			btnOpenImage.Clicked += (_, _) => {
-				var ofd = new OpenDialog ("Open Image") { AllowsMultipleSelection = false };
+				var ofd = new OpenDialog ("Open Image") { AllowsMultipleSelection = false,  };
 				Application.Run (ofd);
 
-				if (ofd.Canceled)
+				if (ofd.Path is not null) {
+					Directory.SetCurrentDirectory (Path.GetFullPath(Path.GetDirectoryName(ofd.Path)!));
+				}
+
+				if (ofd.Canceled) {
 					return;
+				}
 
 				var path = ofd.FilePaths [0];
 

UICatalog/UICatalog.cs

@@ -117,6 +117,7 @@ namespace UICatalog {
 				scenario.Theme = _cachedTheme;
 				scenario.TopLevelColorScheme = _topLevelColorScheme;
 				scenario.Init ();
+				Application.Driver.Force16Colors = _force16Colors;
 				scenario.Setup ();
 				scenario.Run ();
 				scenario.Dispose ();
@@ -231,6 +232,7 @@ namespace UICatalog {
 		static Scenario? _selectedScenario = null;
 
 		static bool _useSystemConsole = false;
+		static bool _force16Colors = false;
 		static ConsoleDriver.DiagnosticFlags _diagnosticFlags;
 		static bool _isFirstRunning = true;
 		static string _topLevelColorScheme = string.Empty;
@@ -532,12 +534,13 @@ namespace UICatalog {
 			{
 				List<MenuItem> menuItems = new List<MenuItem> ();
 				miForce16Colors = new MenuItem {
-					Title = "Force 16 _Colors"
+					Title = "Force 16 _Colors",
+					Checked = _force16Colors
 				};
 				miForce16Colors.Shortcut = Key.CtrlMask | Key.AltMask | (Key)miForce16Colors!.Title!.Substring (10, 1) [0];
 				miForce16Colors.CheckType |= MenuItemCheckStyle.Checked;
 				miForce16Colors.Action += () => {
-					miForce16Colors.Checked = Application.Driver.Force16Colors = (bool)!miForce16Colors.Checked!;
+					miForce16Colors.Checked = _force16Colors = Application.Driver.Force16Colors = (bool)!miForce16Colors.Checked!;
 					Application.Refresh ();
 				};
 				menuItems.Add (miForce16Colors);