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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.Core.Commands;
namespace Tango.PPC.Common.Navigation
{
/// <summary>
/// Represents the PPC views navigation manager.
/// </summary>
public interface INavigationManager
{
/// <summary>
/// Occurs when the current view model has changed.
/// </summary>
event EventHandler<PPCViewModel> CurrentVMChanged;
/// <summary>
/// Gets the current module.
/// </summary>
IPPCModule CurrentModule { get; }
/// <summary>
/// Gets the current view model.
/// </summary>
PPCViewModel CurrentVM { get; }
/// <summary>
/// Gets a value indicating whether the navigation system is able to navigate to the previous view.
/// </summary>
bool CanNavigateBack { get; }
/// <summary>
/// Gets a value indicating whether the back should be enabled.
/// </summary>
bool IsBackEnabled { get; set; }
/// <summary>
/// Gets or sets a value indicating whether the navigation system is currently navigating.
/// </summary>
bool IsNavigating { get; set; }
/// <summary>
/// Navigates to the previous view if <see cref="CanNavigateBack"/> is true.
/// </summary>
Task<bool> NavigateBack();
/// <summary>
/// Navigates to the previous view..
/// </summary>
RelayCommand NavigateBackCommand { get; }
/// <summary>
/// Navigates to the specified full path in command parameter.
/// </summary>
RelayCommand<String> NavigateToCommand { get; }
/// <summary>
/// Navigates to the specified PPC view.
/// </summary>
/// <param name="view">The view.</param>
Task<bool> NavigateTo(NavigationView view, bool pushToHistory = true);
/// <summary>
/// Navigates to the specified PPC view with the specified receive object.
/// </summary>
/// <param name="view">The view.</param>
Task<bool> NavigateWithObject<TPass>(NavigationView view, TPass obj, bool pushToHistory = true);
/// <summary>
/// Navigates to the specified module.
/// </summary>
/// <typeparam name="T"></typeparam>
Task<bool> NavigateTo<T>(bool pushToHistory = true) where T : IPPCModule;
/// <summary>
/// Navigates to the specified module using the view path (e.g MainView.JobsView).
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="viewPath">The view path.</param>
Task<bool> NavigateTo<T>(String viewPath, bool pushToHistory = true) where T : IPPCModule;
/// <summary>
/// Navigates to the specified module using the view path (e.g MainView,JobsView).
/// This method makes it easy to do stuff like NavigateTo(nameof(MainView),nameof(JobsView));
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="viewPath">The view path.</param>
Task<bool> NavigateTo<T>(bool pushToHistory = true, params String[] viewPath) where T : IPPCModule;
/// <summary>
/// Navigates to the specified module and view by full path (e.g Jobs.JobsView).
/// </summary>
/// <param name="fullPath">The full path.</param>
Task<bool> NavigateTo(String fullPath, bool pushToHistory = true, Action<PPCViewModel, PPCViewModel> onNavigating = null, Action<PPCViewModel, PPCViewModel> onNavigated = null);
/// <summary>
/// Navigates to the specified module and view with the specified object and expecting a return parameter.
/// The view must be of type INavigationResultProvider<TResult>.
/// </summary>
/// <param name="fullPath">The full path.</param>
Task<TResult> NavigateForResult<TModule, TView, TResult, TPass>(TPass obj, bool pushToHistory = true)
where TModule : IPPCModule;
/// <summary>
/// Navigates to the specified module and view with the specified object.
/// </summary>
/// <typeparam name="TModule">The type of the module.</typeparam>
/// <typeparam name="TView">The type of the view.</typeparam>
/// <typeparam name="TPass">The type of the pass.</typeparam>
/// <param name="obj">The object.</param>
/// <param name="pushToHistory">if set to <c>true</c> [push to history].</param>
/// <returns></returns>
Task<bool> NavigateWithObject<TModule, TView, TPass>(TPass obj, bool pushToHistory = true)
where TModule : IPPCModule;
/// <summary>
/// Clears the navigation back history.
/// </summary>
void ClearHistory();
/// <summary>
/// Clears the navigation back history except the specified view type.
/// </summary>
void ClearHistoryExcept<T>();
}
}
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