Fixed Dialog & Messagebox

Terminal.Gui/View/View.Command.cs

@@ -68,9 +68,9 @@ public partial class View // Command APIs
     ///     If <see langword="true"/> the event was canceled. If <see langword="false"/> the event was raised but not canceled.
     ///     If <see langword="null"/> no event was raised.
     /// </returns>
-    protected bool? RaiseAccepting ()
+    protected bool? RaiseAccepting (CommandContext ctx)
     {
-        CommandEventArgs args = new ();
+        CommandEventArgs args = new () { Context = ctx };
 
         // Best practice is to invoke the virtual method first.
         // This allows derived classes to handle the event and potentially cancel it.

Terminal.Gui/Views/Button.cs

@@ -79,7 +79,7 @@ public class Button : View, IDesignable
             return true;
         }
 
-        bool? handled = RaiseAccepting ();
+        bool? handled = RaiseAccepting (ctx);
 
         if (handled == true)
         {
@@ -132,6 +132,7 @@ public class Button : View, IDesignable
             return;
         }
 
+        // TODO: With https://github.com/gui-cs/Terminal.Gui/issues/3778 we won't have to pass data:
         e.Handled = InvokeCommand (Command.HotKey, new (Command.HotKey, null, data: this)) == true;
     }
 

Terminal.Gui/Views/ComboBox.cs

@@ -84,7 +84,7 @@ public class ComboBox : View, IDesignable
                                         {
                                             return null;
                                         }
-                                        return ActivateSelected ();
+                                        return ActivateSelected (ctx);
                                     });
         AddCommand (Command.Toggle, () => ExpandCollapse ());
         AddCommand (Command.Expand, () => Expand ());
@@ -392,7 +392,7 @@ public class ComboBox : View, IDesignable
         }
     }
 
-    private bool ActivateSelected ()
+    private bool ActivateSelected (CommandContext ctx)
     {
         if (HasItems ())
         {
@@ -401,7 +401,7 @@ public class ComboBox : View, IDesignable
                 return false;
             }
 
-            return RaiseAccepting () == true;
+            return RaiseAccepting (ctx) == true;
         }
 
         return false;

Terminal.Gui/Views/ListView.cs

@@ -138,9 +138,9 @@ public class ListView : View, IDesignable
         AddCommand (Command.ScrollRight, () => ScrollHorizontal (1));
 
         // Accept (Enter key) - Raise Accept event - DO NOT advance state
-        AddCommand (Command.Accept, () =>
+        AddCommand (Command.Accept, (ctx) =>
                                     {
-                                        if (RaiseAccepting () == true)
+                                        if (RaiseAccepting (ctx) == true)
                                         {
                                             return true;
                                         }

Terminal.Gui/Views/Menu/MenuBar.cs

@@ -119,14 +119,14 @@ public class MenuBar : View, IDesignable
 
         AddCommand (
                     Command.Accept,
-                    () =>
+                    (ctx) =>
                     {
                         if (Menus.Length > 0)
                         {
                             ProcessMenu (_selected, Menus [_selected]);
                         }
 
-                        return RaiseAccepting ();
+                        return RaiseAccepting (ctx);
                     }
                    );
         AddCommand (Command.Toggle, ctx =>

Terminal.Gui/Views/MessageBox.cs

@@ -338,6 +338,7 @@ public static class MessageBox
         // Create button array for Dialog
         var count = 0;
         List<Button> buttonList = new ();
+        Clicked = -1;
 
         if (buttons is { })
         {
@@ -350,12 +351,28 @@ public static class MessageBox
             {
                 var b = new Button
                 {
-                    Text = s,
+                    Text = $"_{s}",
+                    Data = count,
                 };
 
                 if (count == defaultButton)
                 {
                     b.IsDefault = true;
+                    b.Accepting += (s, e) =>
+                                   {
+                                       // TODO: With https://github.com/gui-cs/Terminal.Gui/issues/3778 we can simplify this
+                                       if (e.Context.Data is Button button)
+                                       {
+                                           Clicked = (int)button.Data!;
+                                       } 
+                                       else if (e.Context.KeyBinding?.BoundView is Button btn)
+                                       {
+                                           Clicked = (int)btn.Data!;
+                                       }
+
+                                       e.Cancel = true;
+                                       Application.RequestStop ();
+                                   };
                 }
 
                 buttonList.Add (b);
@@ -373,7 +390,7 @@ public static class MessageBox
         };
 
         d.Width = Dim.Auto (DimAutoStyle.Auto,
-                            minimumContentDim: Dim.Func (() => (int)((Application.Screen.Width - d.GetAdornmentsThickness ().Horizontal) * (DefaultMinimumWidth / 100f) )),
+                            minimumContentDim: Dim.Func (() => (int)((Application.Screen.Width - d.GetAdornmentsThickness ().Horizontal) * (DefaultMinimumWidth / 100f))),
                             maximumContentDim: Dim.Func (() => (int)((Application.Screen.Width - d.GetAdornmentsThickness ().Horizontal) * 0.9f)));
 
         d.Height = Dim.Auto (DimAutoStyle.Auto,
@@ -400,21 +417,6 @@ public static class MessageBox
         d.TextFormatter.WordWrap = wrapMessage;
         d.TextFormatter.MultiLine = !wrapMessage;
 
-        // Setup actions
-        Clicked = -1;
-
-        for (var n = 0; n < buttonList.Count; n++)
-        {
-            int buttonId = n;
-            Button b = buttonList [n];
-
-            b.Accepting += (s, e) =>
-                         {
-                             Clicked = buttonId;
-                             Application.RequestStop ();
-                         };
-        }
-
         // Run the modal; do not shut down the mainloop driver when done
         Application.Run (d);
         d.Dispose ();

Terminal.Gui/Views/RadioGroup.cs

@@ -50,7 +50,7 @@ public class RadioGroup : View, IDesignable, IOrientation
                     });
 
         // Accept (Enter key) - Raise Accept event - DO NOT advance state
-        AddCommand (Command.Accept, () => RaiseAccepting ());
+        AddCommand (Command.Accept, RaiseAccepting);
 
         // Hotkey - ctx may indicate a radio item hotkey was pressed. Beahvior depends on HasFocus
         //          If HasFocus and it's this.HotKey invoke Select command - DO NOT raise Accept

Terminal.Gui/Views/Shortcut.cs

@@ -344,7 +344,7 @@ public class Shortcut : View, IOrientation, IDesignable
 
         var cancel = false;
 
-        cancel = RaiseAccepting () is true;
+        cancel = RaiseAccepting (ctx) is true;
 
         if (cancel)
         {

Terminal.Gui/Views/Slider.cs

@@ -1423,7 +1423,7 @@ public class Slider<T> : View, IOrientation
         AddCommand (Command.RightExtend, () => ExtendPlus ());
         AddCommand (Command.LeftExtend, () => ExtendMinus ());
         AddCommand (Command.Select, () => Select ());
-        AddCommand (Command.Accept, () => Accept ());
+        AddCommand (Command.Accept, (ctx) => Accept (ctx));
 
         SetKeyBindings ();
     }
@@ -1785,11 +1785,11 @@ public class Slider<T> : View, IOrientation
         return SetFocusedOption ();
     }
 
-    internal bool Accept ()
+    internal bool Accept (CommandContext ctx)
     {
         SetFocusedOption ();
 
-        return RaiseAccepting () == true;
+        return RaiseAccepting (ctx) == true;
     }
 
     internal bool MovePlus ()

Terminal.Gui/Views/TextView.cs

@@ -2012,7 +2012,7 @@ public class TextView : View
         // Things this view knows how to do
 
         // Note - NewLine is only bound to Enter if Multiline is true
-        AddCommand (Command.NewLine, () => ProcessEnterKey ());
+        AddCommand (Command.NewLine, (ctx) => ProcessEnterKey (ctx));
 
         AddCommand (
                     Command.PageDown,
@@ -6043,7 +6043,7 @@ public class TextView : View
         Paste ();
     }
 
-    private bool ProcessEnterKey ()
+    private bool ProcessEnterKey (CommandContext ctx)
     {
         ResetColumnTrack ();
 
@@ -6056,7 +6056,7 @@ public class TextView : View
         {
             // By Default pressing ENTER should be ignored (OnAccept will return false or null). Only cancel if the
             // event was fired and set Cancel = true.
-            return RaiseAccepting () is null or false;
+            return RaiseAccepting (ctx) is null or false;
         }
 
         SetWrapModel ();

Terminal.Gui/Views/TreeView/TreeView.cs

@@ -443,10 +443,10 @@ public class TreeView<T> : View, ITreeView where T : class
     ///     <para>This method also ensures that the selected object is visible.</para>
     /// </summary>
     /// <returns><see langword="true"/> if <see cref="ObjectActivated"/> was fired.</returns>
-    public bool? ActivateSelectedObjectIfAny ()
+    public bool? ActivateSelectedObjectIfAny (CommandContext ctx)
     {
         // By default, Command.Accept calls OnAccept, so we need to call it here to ensure that the event is fired.
-        if (RaiseAccepting () == true)
+        if (RaiseAccepting (ctx) == true)
         {
             return true;
         }

UICatalog/Scenarios/Dialogs.cs

@@ -258,6 +258,7 @@ public class Dialogs : Scenario
                 button.Accepting += (s, e) =>
                                  {
                                      clicked = buttonId;
+                                     e.Cancel = true;
                                      Application.RequestStop ();
                                  };
                 buttons.Add (button);