internal override void Apply(VisualElement container) { /// <sample> // Note: See also RadioButtonGroup in the ChoiceField section of UI Toolkit Samples // Get a reference to the first radio button from UXML and assign it its value. var uxmlField1 = container.Q <RadioButton>("the-uxml-field1"); var uxmlField2 = container.Q <RadioButton>("the-uxml-field2"); uxmlField1.value = true; // Create two RadioButtons in a separate group, disable them, and give them a style class. var groupBox = new GroupBox(); container.Add(groupBox); var csharpField1 = new RadioButton("C# Field 1"); csharpField1.SetEnabled(false); csharpField1.AddToClassList("some-styled-field"); groupBox.Add(csharpField1); var csharpField2 = new RadioButton("C# Field 2"); csharpField2.SetEnabled(false); csharpField2.AddToClassList("some-styled-field"); groupBox.Add(csharpField2); csharpField1.value = uxmlField1.value; // Mirror value of uxml field into the C# field. uxmlField1.RegisterCallback <ChangeEvent <bool> >((evt) => { csharpField1.value = evt.newValue; }); uxmlField2.RegisterCallback <ChangeEvent <bool> >((evt) => { csharpField2.value = evt.newValue; }); /// </sample> }