/// <inheritdoc />
/// <summary>
/// Initializes a new instance of the
/// <see cref="T:MouseNet.Forms.Controls.RadioButtonGroup" /> class.
/// </summary>
public RadioButtonGroup()
{
InitializeComponent();
_buttonLayout = RadioButtonLayout.Vertical;
_buttonMargin = Padding;
PaddingChanged +=
(sender,
args) => ArrangeButtons();
}
private MvcHtmlString WrapRadioButtonsInFieldSet(
string radioButtonsHtml,
MvcHtmlString legendText,
RadioButtonLegend legend,
RadioButtonLayout layout)
{
string legendClassHtml;
switch (legend)
{
case RadioButtonLegend.Displayed:
legendClassHtml = string.Empty;
break;
case RadioButtonLegend.VisuallyHidden:
legendClassHtml = "class=\"govuk-visually-hidden\"";
break;
default:
throw new NotSupportedException();
}
string legendHtml = string.Format("<legend {0}>{1}</legend>", legendClassHtml, legendText);
//string fieldSetClassHtml;
//switch (layout)
//{
// case RadioButtonLayout.Stacked:
// fieldSetClassHtml = "class=\"govuk-fieldset\"";
// break;
// case RadioButtonLayout.Inline:
// fieldSetClassHtml = "class=\"govuk-fieldset inline\"";
// break;
// default:
// throw new NotSupportedException();
//}
string fieldSetHtml = string.Format("<fieldset class=\"govuk-fieldset inline\">{0}{1}</fieldset>", legendHtml, radioButtonsHtml);
return(new MvcHtmlString(fieldSetHtml));
}
public MvcHtmlString RadioButtonsFor <TValue, T>(
Expression <Func <TModel, TValue> > expression,
IEnumerable <T> possibleValues,
Func <T, object> keySelector,
Func <T, object> valueSelector,
RadioButtonLegend legend,
RadioButtonLayout layout)
{
string labelsHtml = string.Empty;
foreach (T possibleValue in possibleValues)
{
MvcHtmlString name = HtmlHelper.NameFor(expression);
string key = keySelector(possibleValue).ToString();
string value = valueSelector(possibleValue).ToString();
string id = string.Format("{0}-{1}", name, key);
var radioButtonDiv = "<div class=\"govuk-radios__item\">{0}</div>";
string inputHtml = string.Format("<input class=\"govuk-radios__input\" id=\"{0}\" type=\"radio\" name=\"{1}\" value=\"{2}\">", id, name, key);
string labelHtml = string.Format("<label class=\"govuk-label govuk-radios__label\" for=\"{0}\">{2}</label>", id, inputHtml, value);
radioButtonDiv = string.Format(radioButtonDiv, inputHtml + labelHtml);
labelsHtml += radioButtonDiv;
}
MvcHtmlString legendText = HtmlHelper.DisplayNameFor(expression);
if (MvcHtmlString.IsNullOrEmpty(legendText))
{
string errorMessage = "A legend should always be provided for a radio button selection. " +
"Consider adding a display name data annotation to the selected item property.";
throw new Exception(errorMessage);
}
return(WrapRadioButtonsInFieldSet(labelsHtml, legendText, legend, layout));
}
private string GetRadioButtonsDiv(RadioButtonLayout layout)
{
var style = string.Empty;
switch (layout)
{
case RadioButtonLayout.Inline:
style = "govuk-radios--inline";
break;
case RadioButtonLayout.Stacked:
break;
default:
throw new NotSupportedException();
}
var classAttribute = string.Format("class=\"govuk-radios {0}\"", style);
return(string.Format("<div {0}>{1}</div>", classAttribute, "{0}"));
}
public MvcHtmlString RadioButtonsFor <TValue>(
Expression <Func <TModel, TValue> > expression,
IList <string> possibleValues,
string legendText,
RadioButtonLegend legend,
RadioButtonLayout layout)
{
if (string.IsNullOrEmpty(legendText))
{
throw new InvalidOperationException("A legend should always be provided for a radio button selection");
}
var radioButtonHtml = string.Empty;
var outerDiv = GetRadioButtonsDiv(layout);
for (var i = 0; i < possibleValues.Count; i++)
{
var idForThisButton = string.Format("{0}-{1}", HtmlHelper.NameFor(expression), i);
var radioButtonDiv = "<div class=\"govuk-radios__item\">{0}</div>";
var radioButton = HtmlHelper.RadioButtonFor(expression,
possibleValues[i], new { id = idForThisButton, @class = "govuk-radios__input" }).ToString();
var display = HtmlHelper.DisplayFor(m => possibleValues[i]);
var label = string.Format("<label for=\"{0}\" class=\"govuk-label govuk-radios__label\">{1}</label>", idForThisButton, display);
radioButtonDiv = string.Format(radioButtonDiv, HtmlHelper.HiddenFor(m => possibleValues[i]) + radioButton + label);
radioButtonHtml += radioButtonDiv;
}
return(WrapRadioButtonsInFieldSet(string.Format(outerDiv, radioButtonHtml), new MvcHtmlString(legendText), legend, layout));
}
