/// <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
);
LocalizedValue localizedValue;
if (CategoryBinding != null)
{
localizedValue = new BindingLocalizedValue(property, CategoryBinding, StringFormat);
}
else
{
// Check if the property supports binding localization
MultiBindingLocalizedValue.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);
}
localizedValue = new MultiBindingLocalizedValue(
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)
{
if (service.TargetProperty is DependencyProperty)
{
var property = new LocalizedDependencyProperty(
(DependencyObject)service.TargetObject,
(DependencyProperty)service.TargetProperty
);
LocalizedValue localizedValue;
if (CategoryBinding != null)
{
localizedValue = new BindingLocalizedValue(property, CategoryBinding, StringFormat);
}
else
{
// Check if the property supports binding localization
MultiBindingLocalizedValue.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;
}
localizedValue = new MultiBindingLocalizedValue(
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;
}
}
