public PresentedParameter Present(IParameterDescriptor param, Action updateCallback)
{
var textBox = new TextBox {
MaxLength = param.ValueType == typeof(char) ? 1 : 128
};
textBox.TextChanged += (sender, args) => updateCallback();
void Setter(object val) => textBox.Text = param.ConvertValueToString(val ?? "");
object Getter() => param.ParseValueFromString(textBox.Text ?? "");
void Updater(ParameterStateType state, bool value)
{
switch (state)
{
case ParameterStateType.Enabled:
textBox.IsEnabled = value;
break;
case ParameterStateType.Valid:
textBox.Background = value ? Brushes.Transparent : new SolidColorBrush(ViewConstants.InvalidColor);
break;
}
}
return(new PresentedParameter(param, textBox, new PresentedParameter.ParamDelegates(Getter, Setter, param.IsValid, Updater)));
}
public PresentedParameter Present(IParameterDescriptor param, Action updateCallback)
{
string ToStrFunc(object value) => param.ConvertValueToString(value);
IEnumerable items;
if (SelectableValuesFuncProperty.TryGet(param.Metadata, out var selectableValuesFunc))
{
items = selectableValuesFunc(param);
}
else if (param.IsSelectable())
{
items = param.SelectableValues;
}
else
{
throw new ProgrammingException("Parameter.SelectableValues or SelectablePresenter.SelectableValuesFuncProperty must be assigned");
}
var comboBox = new ComboBox {
ItemsSource = ToStringOverridenWrapper.Of(items, ToStrFunc)
};
comboBox.SelectionChanged += (sender, args) => updateCallback();
void Setter(object val) => comboBox.SelectedValue = ToStringOverridenWrapper.Wrap(val, ToStrFunc);
object Getter() => ToStringOverridenWrapper.TryUnwrap(comboBox.SelectedValue);
void Updater(ParameterStateType state, bool value)
{
if (state == ParameterStateType.Enabled)
{
comboBox.IsEnabled = value;
}
}
return(new PresentedParameter(param, comboBox, new PresentedParameter.ParamDelegates(Getter, Setter, value => value != null, Updater)));
}
