MonoGame UI RadioButton

RadioButtons provide mutually exclusive selection within a named group. Selecting any button in a group automatically deselects all others. For complete code templates, read references/ui-radiobutton.md.

Assumed Contract

Extends UIElement from monogame-ui-core. Receives pointer events from monogame-ui-interaction. Participates in focus via monogame-ui-focus — arrow keys navigate between options in the same group.

RadioGroup

RadioGroup is the source of truth for selection — it is not a visual element. It:

• Holds a list of RadioButton instances belonging to it
• Tracks SelectedButton (the currently checked one)
• Provides Select(button) which deselects all others and selects the given one
• Fires SelectionChanged(RadioGroup, RadioButton)

Registration: Pass the group to the button's constructor — buttons register themselves automatically. Never manage selection state inside individual buttons — always delegate to the group.