using Gtk;

void main(string[] args)
{
	Gtk.init (ref args);
	var buffer = new MyTextBuffer (null);
	var view = new TextView.with_buffer (buffer);
	var win = new Window();
	win.realize.connect (() => {
		TextIter iter;
		buffer.get_start_iter (out iter);
		string txt = "this is a bold & red formatted text";
		buffer.insert_with_tags (iter, txt, txt.length, buffer.bold_red);
	});
	win.add (view);
	win.show_all();
	Gtk.main();
}

class MyTextBuffer : TextBuffer
{
	public MyTextBuffer (TextTagTable? table)
	{
		Object (tag_table: table);
	}
	
	construct {
		bold_red = create_tag ("bold-red", "weight", Pango.Weight.BOLD, "foreground", "#FF0000");
	}
	
	public TextTag bold_red { get; private set; }
}