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>
}