using System;
#if XFORMS
using Xamarin.Forms;
using DependencyProperty = Xamarin.Forms.BindableProperty;
#elif WinRT
using Windows.UI.Xaml;
#else
using System.Windows;
#endif
namespace Caliburn.Micro
{
///
/// Class that abstracts the differences in creating a DepedencyProperty / BindableProperty on the different platforms.
///
public static class DependencyPropertyHelper
{
///
/// Register an attached dependency / bindable property
///
/// The property name
/// The property type
/// The owner type
/// The default value
/// Callback to executed on property changed
/// The registred attached dependecy property
public static DependencyProperty RegisterAttached(string name, Type propertyType, Type ownerType, object defaultValue = null, PropertyChangedCallback propertyChangedCallback = null) {
#if XFORMS
return DependencyProperty.CreateAttached(name, propertyType, ownerType, defaultValue, propertyChanged: (obj, oldValue, newValue) => {
if (propertyChangedCallback != null)
propertyChangedCallback(obj, new DependencyPropertyChangedEventArgs(newValue, oldValue, null));
});
#else
return DependencyProperty.RegisterAttached(name, propertyType, ownerType, new PropertyMetadata(defaultValue, propertyChangedCallback));
#endif
}
///
/// Register a dependency / bindable property
///
/// The property name
/// The property type
/// The owner type
/// The default value
/// Callback to executed on property changed
/// The registred dependecy property
public static DependencyProperty Register(string name, Type propertyType, Type ownerType, object defaultValue = null, PropertyChangedCallback propertyChangedCallback = null)
{
#if XFORMS
return DependencyProperty.Create(name, propertyType, ownerType, defaultValue, propertyChanged: (obj, oldValue, newValue) =>
{
if (propertyChangedCallback != null)
propertyChangedCallback(obj, new DependencyPropertyChangedEventArgs(newValue, oldValue, null));
});
#else
return DependencyProperty.Register(name, propertyType, ownerType, new PropertyMetadata(defaultValue, propertyChangedCallback));
#endif
}
}
}