Esempio n. 1
0
        /// <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 DependencyProperty || service.TargetProperty is PropertyInfo)
            {
                // The extension is used in a template

                return this;
            }
            else
            {
                return null;
            }
        }
Esempio n. 2
0
        /// <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 DependencyProperty || service.TargetProperty is PropertyInfo)
            {
                // The extension is used in a template

                return(this);
            }
            else
            {
                return(null);
            }
        }