72 lines
2.6 KiB
C#
72 lines
2.6 KiB
C#
|
#region CPL License
|
|||
|
|
/*
|
|||
|
|
Nuclex Framework
|
|||
|
|
Copyright (C) 2002-2019 Nuclex Development Labs
|
|||
|
|
|
|||
|
|
This library is free software; you can redistribute it and/or
|
|||
|
|
modify it under the terms of the IBM Common Public License as
|
|||
|
|
published by the IBM Corporation; either version 1.0 of the
|
|||
|
|
License, or (at your option) any later version.
|
|||
|
|
|
|||
|
|
This library is distributed in the hope that it will be useful,
|
|||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|||
|
|
IBM Common Public License for more details.
|
|||
|
|
|
|||
|
|
You should have received a copy of the IBM Common Public
|
|||
|
|
License along with this library
|
|||
|
|
*/
|
|||
|
|
#endregion
|
|||
|
|
|
|||
|
|
using System;
|
|||
|
|
|
|||
|
|
using Nuclex.Support;
|
|||
|
|
|
|||
|
|
namespace Nuclex.Windows.Forms.ViewModels {
|
|||
|
|
|
|||
|
|
/// <summary>Base class for view models that have multiple child view models</summary>
|
|||
|
|
/// <typeparam name="TPageEnumeration">Enum type by which pages can be indicated</typeparam>
|
|||
|
|
public abstract class MultiPageViewModel<TPageEnumeration> : Observable
|
|||
|
|
where TPageEnumeration : IEquatable<TPageEnumeration> {
|
|||
|
|
|
|||
|
|
/// <summary>Initializes a new multi-page view model</summary>
|
|||
|
|
/// <param name="windowManager">
|
|||
|
|
/// Window manager the view model uses to create child views
|
|||
|
|
/// </param>
|
|||
|
|
/// <param name="cachePageViewModels">
|
|||
|
|
/// Whether child view models will be kept alive and reused
|
|||
|
|
/// </param>
|
|||
|
|
public MultiPageViewModel(IWindowManager windowManager, bool cachePageViewModels = false) {
|
|||
|
|
this.windowManager = windowManager;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>Child page that is currently being displayed by the view model</summary>
|
|||
|
|
public TPageEnumeration ActivePage {
|
|||
|
|
get { return this.activePage; }
|
|||
|
|
set {
|
|||
|
|
if(!this.activePage.Equals(value)) {
|
|||
|
|
this.activePage = value;
|
|||
|
|
OnPropertyChanged(nameof(ActivePage));
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>Windowmanager that can create view models and display other views</summary>
|
|||
|
|
protected IWindowManager WindowManager {
|
|||
|
|
get { return this.windowManager; }
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>Creates a view model for the specified page</summary>
|
|||
|
|
/// <param name="page">Page for which a view model will be created</param>
|
|||
|
|
/// <returns>The view model for the specified page</returns>
|
|||
|
|
protected abstract object createViewModelForPage(TPageEnumeration page);
|
|||
|
|
|
|||
|
|
/// <summary>Page that is currently active in the multi-page view model</summary>
|
|||
|
|
private TPageEnumeration activePage;
|
|||
|
|
/// <summary>Window manager that can be used to display other views</summary>
|
|||
|
|
private IWindowManager windowManager;
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
} // namespace Nuclex.Windows.Forms.ViewModels
|