How to change font styles in a ButtonGroup component (Starling version)
A ButtonGroup component contains one or more Button sub-components that display some text. Let's look at how to change the font styles in the buttons outside of the theme.
The button font styles
We can customize the buttons inside the button group's buttonFactory. As long as we aren't setting any advanced font styles on the button's text renderer (and the theme isn't either), we can pass a starling.text.TextFormat directly to the button's fontStyles property.
var group:ButtonGroup = new ButtonGroup();
group.buttonFactory = function():Button
{
var button:Button = new Button();
button.fontStyles = new TextFormat( "Arial", 20, 0x3c3c3c );
return button;
};
If we wanted to change the button's font styles inside the theme, we could set the customButtonStyleName property on the ButtonGroup and extend the theme.