|
//---------------------------------------------------------------------------
//
// Copyright (C) 2004 by Microsoft Corporation. All rights reserved.
//
//---------------------------------------------------------------------------
using System;
using System.Reflection;
using System.Text;
using System.Windows;
using System.Windows.Markup;
using System.ComponentModel;
using System.Diagnostics;
namespace System.Windows
{
/// <summary>
/// Implements ResourceKey to create unique keys for our system resources.
/// Keys will be exposed publicly only with the ResourceKey API.
/// </summary>
[TypeConverter(typeof(System.Windows.Markup.SystemKeyConverter))]
internal class SystemThemeKey : ResourceKey
{
/// <summary>
/// Constructs a new instance of the key with the given ID.
/// </summary>
/// <param name="id">The internal, unique ID of the system resource.</param>
internal SystemThemeKey(SystemResourceKeyID id)
{
_id = id;
Debug.Assert(id > SystemResourceKeyID.InternalSystemThemeStylesStart &&
id < SystemResourceKeyID.InternalSystemThemeStylesEnd);
}
/// <summary>
/// Used to determine where to look for the resource dictionary that holds this resource.
/// </summary>
public override Assembly Assembly
{
get
{
if (_presentationFrameworkAssembly == null)
{
_presentationFrameworkAssembly = typeof(FrameworkElement).Assembly;
}
return _presentationFrameworkAssembly;
}
}
/// <summary>
/// Determines if the passed in object is equal to this object.
/// Two keys will be equal if they both have the same ID.
/// </summary>
/// <param name="o">The object to compare with.</param>
/// <returns>True if the objects are equal. False otherwise.</returns>
public override bool Equals(object o)
{
SystemThemeKey key = o as SystemThemeKey;
if (key != null)
{
return key._id == this._id;
}
return false;
}
/// <summary>
/// Serves as a hash function for a particular type.
/// </summary>
public override int GetHashCode()
{
return (int)_id;
}
/// <summary>
/// get string representation of this key
/// </summary>
/// <returns>the string representation of the key</returns>
public override string ToString()
{
return _id.ToString();
}
internal SystemResourceKeyID InternalKey
{
get
{
return _id;
}
}
private SystemResourceKeyID _id;
private static Assembly _presentationFrameworkAssembly;
}
}
|