/// <summary>
/// Initializes a new instance of the <see cref="BindingLocalizedValue"/> class.
/// </summary>
/// <param name="property">The property.</param>
/// <param name="resourceKey">The resource key.</param>
/// <param name="stringFormat">The string format.</param>
/// <param name="bindings">The bindings.</param>
/// <exception cref="ArgumentNullException"><paramref name="property"/> is null.</exception>
/// <exception cref="ArgumentException">The type of the <paramref name="property"/> is neither
/// <see cref="String"/> nor <see cref="Object"/>.</exception>
/// <exception cref="ArgumentException"><paramref name="resourceKey"/> is null or empty
/// AND <paramref name="stringFormat"/> is null or empty.</exception>
/// <exception cref="ArgumentNullException"><paramref name="bindings"/> is null.</exception>
/// <exception cref="ArgumentException"><paramref name="bindings"/> is empty.</exception>
public BindingLocalizedValue(
LocalizedDependencyProperty property,
string resourceKey,
string stringFormat,
ICollection <BindingBase> bindings
)
: base(property)
{
CheckPropertySupported(property);
if (string.IsNullOrEmpty(resourceKey) && string.IsNullOrEmpty(stringFormat))
{
throw new ArgumentException("Either a resource key of a format string must be specified.");
}
if (bindings == null)
{
throw new ArgumentNullException("bindings");
}
if (bindings.Count == 0)
{
throw new ArgumentException("At least one binding must be specified.", "bindings");
}
_resourceKey = resourceKey;
_stringFormat = stringFormat;
_bindings = bindings;
}
/// <summary>
/// When implemented in a derived class, returns an object that is set as the value of the target property for this markup extension.
/// </summary>
/// <param name="serviceProvider">Object that can provide services for the markup extension.</param>
/// <returns>
/// The object value to set on the property where the extension is applied.
/// </returns>
public override object ProvideValue(IServiceProvider serviceProvider)
{
var service = serviceProvider.GetService(typeof(IProvideValueTarget)) as IProvideValueTarget;
if (service == null)
{
return(null);
}
if (service.TargetObject is DependencyObject)
{
if (service.TargetProperty is DependencyProperty)
{
var property = new LocalizedDependencyProperty(
(DependencyObject)service.TargetObject,
(DependencyProperty)service.TargetProperty
);
// Check if the property supports binding localization
BindingLocalizedValue.CheckPropertySupported(property);
if (string.IsNullOrEmpty(ResourceKey) && string.IsNullOrEmpty(StringFormat))
{
// Either a resource key of a format string must be specified
return(null);
}
if (_bindings == null || _bindings.Count == 0)
{
// At least one binding must be specified
return(null);
}
var localizedValue = new BindingLocalizedValue(
property,
ResourceKey,
StringFormat,
_bindings
);
LocalizationManager.InternalAddLocalizedValue(localizedValue);
if (property.IsInDesignMode)
{
// At design time VS designer does not set the parent of any control
// before its properties are set. For this reason the correct values
// of inherited attached properties cannot be obtained.
// Therefore, to display the correct localized value it must be updated
// later ater the parrent of the control has been set.
((DependencyObject)service.TargetObject).Dispatcher.BeginInvoke(
new SendOrPostCallback(x => ((LocalizedValue)x).UpdateValue()),
DispatcherPriority.ApplicationIdle,
localizedValue
);
}
return(localizedValue.GetValue());
}
else
{
throw new Exception("This extension can be used only with dependency properties.");
}
}
else if (service.TargetProperty is DependencyProperty || service.TargetProperty is PropertyInfo)
{
// The extension is used in a template
return(this);
}
else
{
return(null);
}
}
/// <summary>
/// When implemented in a derived class, returns an object that is set as the value of the target property for this markup extension.
/// </summary>
/// <param name="serviceProvider">Object that can provide services for the markup extension.</param>
/// <returns>
/// The object value to set on the property where the extension is applied.
/// </returns>
public override object ProvideValue(IServiceProvider serviceProvider)
{
var service = serviceProvider.GetService(typeof(IProvideValueTarget)) as IProvideValueTarget;
if (service == null)
{
return(null);
}
if (service.TargetObject is DependencyObject)
{
LocalizedProperty property;
if (service.TargetProperty is DependencyProperty)
{
property = new LocalizedDependencyProperty(
(DependencyObject)service.TargetObject,
(DependencyProperty)service.TargetProperty
);
}
else if (service.TargetProperty is PropertyInfo)
{
property = new LocalizedNonDependencyProperty(
(DependencyObject)service.TargetObject,
(PropertyInfo)service.TargetProperty
);
}
else
{
return(null);
}
property.Converter = Converter;
property.ConverterParameter = ConverterParameter;
var localizedValue = CreateLocalizedValue(property);
if (localizedValue == null)
{
return(null);
}
LocalizationManager.InternalAddLocalizedValue(localizedValue);
if (property.IsInDesignMode)
{
// At design time VS designer does not set the parent of any control
// before its properties are set. For this reason the correct values
// of inherited attached properties cannot be obtained.
// Therefore, to display the correct localized value it must be updated
// later ater the parrent of the control has been set.
((DependencyObject)service.TargetObject).Dispatcher.BeginInvoke(
new SendOrPostCallback(x => ((LocalizedValue)x).UpdateValue()),
DispatcherPriority.ApplicationIdle,
localizedValue
);
}
return(localizedValue.GetValue());
}
/*
* else if (service.TargetProperty is PropertyInfo && ((PropertyInfo)service.TargetProperty).DeclaringType == typeof(Setter))
* {
* var binding = new Binding()
* {
* Path = new PropertyPath("ResourceKey"),
* BindsDirectlyToSource = true,
* Mode = BindingMode.OneWay,
* Source = new { ResourceKey = "123" },
* };
* return binding;
* }
*/
else if (service.TargetProperty is DependencyProperty || service.TargetProperty is PropertyInfo)
{
// The extension is used in a template
return(this);
}
else
{
return(null);
}
}