64 lines
2.0 KiB
C#
64 lines
2.0 KiB
C#
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using System;
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using System.Collections.Generic;
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#if WinRT
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using Windows.UI.Xaml;
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#else
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using System.Windows;
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#endif
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namespace Caliburn.Micro
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{
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/// <summary>
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/// Represents a resolver that takes a control and returns it's children
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/// </summary>
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public class ChildResolver {
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private readonly Func<Type, bool> filter;
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private readonly Func<DependencyObject, IEnumerable<DependencyObject>> resolver;
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/// <summary>
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/// Creates the ChildResolver using the given anonymous methods.
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/// </summary>
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/// <param name="filter">The filter</param>
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/// <param name="resolver">The resolver</param>
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public ChildResolver(Func<Type, bool> filter, Func<DependencyObject, IEnumerable<DependencyObject>> resolver) {
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this.filter = filter;
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this.resolver = resolver;
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}
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/// <summary>
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/// Can this resolve appy to the given type.
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/// </summary>
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/// <param name="type">The visual tree type.</param>
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/// <returns>Returns true if this resolver applies.</returns>
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public bool CanResolve(Type type) {
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return filter(type);
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}
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/// <summary>
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/// The element from the visual tree for the children to resolve.
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/// </summary>
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/// <param name="obj"></param>
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/// <returns></returns>
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public IEnumerable<DependencyObject> Resolve(DependencyObject obj) {
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return resolver(obj);
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}
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}
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/// <summary>
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/// Generic strongly typed child resolver
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/// </summary>
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/// <typeparam name="T">The type to filter on</typeparam>
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public class ChildResolver<T> : ChildResolver where T : DependencyObject {
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/// <summary>
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/// Creates a
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/// </summary>
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/// <param name="resolver"></param>
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public ChildResolver(Func<T, IEnumerable<DependencyObject>> resolver) : base(
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t => typeof(T).IsAssignableFrom(t),
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o => resolver((T)o)){
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}
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}
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}
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