65 lines
2.8 KiB
C#
65 lines
2.8 KiB
C#
#region Apache License 2.0
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/*
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Nuclex Foundation libraries for .NET
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Copyright (C) 2002-2025 Markus Ewald / Nuclex Development Labs
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#endregion // Apache License 2.0
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using System;
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namespace Nuclex.Avalonia {
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/// <summary>Constructs views and view model in a scope</summary>
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/// <remarks>
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/// <para>
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/// By default the <see cref="WindowManager" /> uses its own
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/// <see cref="WindowManager.CreateInstance" /> method to construct views
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/// and view models via <see cref="Activator.CreateInstance(Type)" />,
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/// which is enough to create forms (which the Windows Forms designer already
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/// requires to have parameterless constructors) and view models, so long as
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/// they also have parameterless constructors.
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/// </para>
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/// <para>
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/// To support dependency injection via constructor parameters, you can
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/// inherit from the <see cref="WindowManager" /> and provide your own override
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/// of <see cref="WindowManager.CreateInstance" /> that constructs the required
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/// instance via your dependency injector. This is decent until you have multiple
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/// view models all accessing the same resource (i.e. a database) via threads.
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/// </para>
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/// <para>
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/// In this final case, "scopes" have become a common solution. Each
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/// scope has access to singleton services (these exist for the lifetime of
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/// the entire application), but there are also scoped services which will have
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/// new instances constructed within each scope. By implementing the
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/// <see cref="WindowManager.CreateWindowScope" /> method, you can make
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/// the window manager set up an implicit scope per window or dialog.
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/// </para>
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/// </remarks>
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public interface IWindowScope : IDisposable {
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/// <summary>Creates an instance of the specified type in the scope</summary>
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/// <param name="type">Type an instance will be created of</param>
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/// <returns>The created instance</returns>
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/// <remarks>
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/// Use this to wire up your dependency injection container. By default,
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/// the Activator class will be used to create instances which only works
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/// if all of your view models are concrete classes.
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/// </remarks>
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object CreateInstance(Type type);
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}
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} // namespace Nuclex.Avalonia
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