Add TabsTextAlignment feature.

Author: BDisp

Terminal.Gui/Views/TabView/TabStyle.cs

@@ -20,4 +20,9 @@ public class TabStyle
 
     /// <summary>Gets or sets the tabs side to render.</summary>
     public TabSide TabsSide { get; set; }
+
+    /// <summary>
+    ///     Gets or sets the tabs text alignments.
+    /// </summary>
+    public Alignment TabsTextAlignment { get; set; }
 }

Terminal.Gui/Views/TabView/TabView.cs

@@ -643,6 +643,7 @@ protected override void Dispose (bool disposing)
                     int maxHeight = Math.Max (0, Math.Min (bounds.Height - 2, 2));
 
                     tab.Height = 2;
+                    tab.TextAlignment = Style.TabsTextAlignment;
 
                     // if tab view is height <= 3 don't render any tabs
                     if (maxHeight == 0)

UICatalog/Scenarios/TabViewExample.cs

@@ -16,6 +16,8 @@ public class TabViewExample : Scenario
     private MenuItem _miShowTopLine;
     private MenuItem [] _miTabsSide;
     private MenuItem _cachedTabsSide;
+    private MenuItem [] _miTabsTextAlignment;
+    private MenuItem _cachedTabsTextAlignment;
     private TabView _tabView;
 
     public override void Main ()
@@ -27,6 +29,7 @@ public override void Main ()
         Toplevel appWindow = new ();
 
         _miTabsSide = SetTabsSide ();
+        _miTabsTextAlignment = SetTabsTextAlignment ();
 
         var menu = new MenuBar
         {
@@ -70,7 +73,12 @@ public override void Main ()
                                   "_Show TabView Border",
                                   "",
                                   ShowTabViewBorder
-                                 ) { Checked = true, CheckType = MenuItemCheckStyle.Checked }
+                                 ) { Checked = true, CheckType = MenuItemCheckStyle.Checked },
+                         null,
+                         _miTabsTextAlignment [0],
+                         _miTabsTextAlignment [1],
+                         _miTabsTextAlignment [2],
+                         _miTabsTextAlignment [3]
                      }
                     )
             ]
@@ -284,6 +292,43 @@ private MenuItem [] SetTabsSide ()
         return menuItems.ToArray ();
     }
 
+    private MenuItem [] SetTabsTextAlignment ()
+    {
+        List<MenuItem> menuItems = [];
+
+        foreach (TabSide align in Enum.GetValues (typeof (Alignment)))
+        {
+            string alignName = Enum.GetName (typeof (Alignment), align);
+            var item = new MenuItem { Title = $"_{alignName}", Data = align };
+            item.CheckType |= MenuItemCheckStyle.Radio;
+
+            item.Action += () =>
+                           {
+                               if (_cachedTabsTextAlignment == item)
+                               {
+                                   return;
+                               }
+
+                               _cachedTabsTextAlignment.Checked = false;
+                               item.Checked = true;
+                               _cachedTabsTextAlignment = item;
+                               _tabView.Style.TabsTextAlignment = (Alignment)item.Data;
+                               _tabView.ApplyStyleChanges ();
+                           };
+            item.ShortcutKey = ((Key)alignName! [0].ToString ().ToLower ()).WithCtrl;
+
+            if (alignName == "Start")
+            {
+                item.Checked = true;
+                _cachedTabsTextAlignment = item;
+            }
+
+            menuItems.Add (item);
+        }
+
+        return menuItems.ToArray ();
+    }
+
     private void ShowBorder ()
     {
         _miShowBorder.Checked = !_miShowBorder.Checked;