GTKSharp, Increasing the text size of a Menu Bar using Mondevelop,Stetic GUI Designer

Question

I am wondering if anyone can help me. I am trying to figure out, how to increase the text inside a menu bar using mono develop. I can increase the size of text in labels and such using

public static FontDescription Font(string Family, int Size, Pango.Style Sty = Pango.Style.Normal)
{
    var F = new FontDescription
    {
        Family = Family,
        Size = Convert.ToInt32(Size * Pango.Scale.PangoScale),
        Style = Sty
    };
    return F;
}

And then:

 var test = Font("Verdana", 24);
 label1.ModifyFont(test);

But when I do this it wont work

MainMenuBar.ModifyFont(test);

Answer 1

You can use Widget.ModifyFont(Pango.FontDescription fd). This method is available in all classes, since it derives from Widget.

However, you cannot change the font of a MenuBar and expect all child MenuItem's fonts. This does not even work for a MenuItem: you have to change the Label inside it, normally accessible by MenuItem.Child.

I have prepared a pair of functions that do the trick:

public static void ChangeContainerFont(Gtk.Container container, string fontDesc)
{
    ChangeWidgetFont( container, fontDesc );

    foreach(Gtk.Widget subw in container.Children) {
        ChangeWidgetFont( subw, fontDesc );

        if ( subw is Gtk.MenuItem menuItem ) {
            var subMenu = menuItem.Submenu;
            ChangeContainerFont( menuItem, fontDesc );

            if ( subMenu is Gtk.Container subContainer ) {
                ChangeContainerFont( subContainer, fontDesc );
            } else {
                if ( subMenu != null ) {
                    ChangeWidgetFont( subMenu, fontDesc );
                }
            }
        } else
        if ( subw is Gtk.Container subContainer ) {
            ChangeContainerFont( subContainer, fontDesc );
        }
    }
}

public static void ChangeWidgetFont(Gtk.Widget w, string fontDesc)
{
    w.ModifyFont( Pango.FontDescription.FromString( fontDesc ) );
}

You can call ChangeContainerFont(c, s) programmatically after the UI has been built (give your menu bar an intuitive name such as menuBar):

ChangeContainerFont( menuBar, "Times 22" );

This will run through all MenuItem's inside, stopping once it reaches a wiget which is not a container. For example, MenuBar or MenuItem are containers (the former contains MenuItem's, the latter contains at least a Label), while a Label is not.

Hope this helps.