When adding more than one Window + TextView together with a MenuBar, the displayed text changes to the text of the first added Window

[luizfernandonb]

Describe the bug
When more than one Window is added together with a TextView and a MenuBar is also added, when hovering the mouse over the console the text displayed is that of the first Window added
I don't know if I explained it correctly, sorry

To Reproduce
The code below shows the bug:

using Terminal.Gui;

Application.Init();

var menuBar = new MenuBar
{
    Menus =
    [
        new()
        {
            Title = "Foo",
            Children =
            [
                new()
                {
                    Title = "Bar",
                },
            ]
        },
    ],
};

foreach (var arg in new[] { "1", "2" })
{
    var win = new Window()
    {
        Title = arg,
    };

    var editor = new TextView()
    {
        Width = Dim.Fill(),
        Height = Dim.Fill(),
        Text = arg
    };

    win.Add(editor);

    Application.Top.Add(win);
}

Application.Top.Add(menuBar);
Application.Run();
Application.Shutdown();

Expected behavior
The same thing is expected to happen when the MenuBar is not added (Just comment on Application.Top.Add(menuBar)), the text displayed is that of the last Window added and when hovering the mouse over it, the text remains the same

Screenshots
When starting the program:

After hovering the mouse over the console:

[BDisp]

Thank you for presenting this issue. From what I noticed there is a contradiction in how views are drawn and how views are focused.
The FocusFirst instruction is trying to focus on the first focusable view but the drawing is drawing the last visible view which will be overlapped. It turns out that the most focused view does not correspond to the focused superview and this is incorrect.

[BDisp]

I changed the code to allowing toggling between windows.

        Application.Init ();

        var top = new Toplevel ();

        foreach (var arg in new [] { "1", "2" })
        {
            var win = new Window ()
            {
                Title = arg,
            };

            var editor = new TextView ()
            {
                Width = Dim.Fill (),
                Height = Dim.Fill (),
                Text = arg
            };

            win.Add (editor);

            top.Add (win);
        }

        MenuItem mi = null;
        View focused = null;

        var menuBar = new MenuBar
        {
            Menus =
            [
                new()
                {
                    Title = "Foo",
                    Children =
                    [
                        mi = new()
                        {
                            Title = "Set win 1 CanFocus to false",
                            Action = () =>
                                     {
                                         if (top.Focused.Title == "1")
                                         {
                                             if (focused is null)
                                             {
                                                 focused = top.Focused;
                                             }
                                             else if (focused != top.Focused)
                                             {
                                                 focused.CanFocus = true;
                                                 focused = top.Focused;
                                             }

                                             focused.CanFocus = false;
                                             mi.Title = "Set win 2 CanFocus to false";
                                         }
                                         else
                                         {
                                             focused.CanFocus = true;
                                             focused = top.Focused;
                                             focused.CanFocus = false;
                                             mi.Title = "Set win 1 CanFocus to false";
                                         }
                                     }
                        },
                    ]
                },
            ],
        };

        top.Add (menuBar);
        Application.Run (top);
        top.Dispose ();
        Application.Shutdown ();

[luizfernandonb]

I changed the code to allowing toggling between windows.

I was able to change between windows using Ctrl + Tab, the problem was only when the mouse passed over the console after the first launch, which is the bug I described

[BDisp]

I was able to change between windows using Ctrl + Tab, the problem was only when the mouse passed over the console after the first launch, which is the bug I described

I know that through the keyboard you can switch between windows, but the bug was due to an improper focus in the Application.Begin method and the CanFocus property. Please test with PR #3548 and check if it is working properly. Thanks.