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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.BL;
using Tango.Core.DI;
using Tango.PPC.Common.Application;
using Tango.PPC.Common.Authentication;
using Tango.PPC.Common.Connection;
using Tango.PPC.Common.ExternalBridge;
using Tango.PPC.Common.Navigation;
using Tango.PPC.Common.Notifications;
using Tango.Settings;
using Tango.SharedUI;
using static Tango.SharedUI.Controls.NavigationControl;
namespace Tango.PPC.Common
{
/// <summary>
/// Represents a PPC view model base class.
/// </summary>
/// <seealso cref="Tango.SharedUI.ViewModel" />
public abstract class PPCViewModel : ViewModel, INavigationViewModel, INavigationBlocker
{
/// <summary>
/// Gets the static observable entities adapter.
/// </summary>
public ObservablesEntitiesAdapter Adapter
{
get { return ObservablesEntitiesAdapter.Instance; }
}
/// <summary>
/// Gets or sets the application manager.
/// </summary>
[TangoInject]
public IPPCApplicationManager ApplicationManager { get; set; }
/// <summary>
/// Gets or sets the authentication provider.
/// </summary>
[TangoInject]
public IAuthenticationProvider AuthenticationProvider { get; set; }
/// <summary>
/// Gets or sets the navigation manager.
/// </summary>
[TangoInject]
public INavigationManager NavigationManager { get; set; }
/// <summary>
/// Gets or sets the notification provider.
/// </summary>
[TangoInject]
public INotificationProvider NotificationProvider { get; set; }
/// <summary>
/// Gets or sets the machine provider.
/// </summary>
[TangoInject]
public IMachineProvider MachineProvider { get; set; }
/// <summary>
/// Gets or sets the external bridge service.
/// </summary>
[TangoInject]
public IPPCExternalBridgeService ExternalBridgeService { get; set; }
private PPCSettings _settings;
/// <summary>
/// Gets the main PPC settings.
/// </summary>
public PPCSettings Settings
{
get
{
if (_settings == null)
{
_settings = SettingsManager.Default.GetOrCreate<PPCSettings>();
}
return _settings;
}
private set { _settings = value; }
}
private bool _isVisible;
/// <summary>
/// Gets or sets a value indicating whether this <see cref="PPCViewModel"/> view is visible.
/// </summary>
public bool IsVisible
{
get { return _isVisible; }
private set { _isVisible = value; RaisePropertyChangedAuto(); }
}
/// <summary>
/// Called when the application has been started.
/// </summary>
public abstract void OnApplicationStarted();
/// <summary>
/// Called when the application is shutting down.
/// </summary>
public virtual void OnApplicationShuttingDown()
{
}
/// <summary>
/// Called when the navigation system has navigated to this VM view.
/// </summary>
public virtual void OnNavigatedTo()
{
IsVisible = true;
}
/// <summary>
/// Called when the navigation system has navigated from this VM view.
/// </summary>
public virtual void OnNavigatedFrom()
{
IsVisible = false;
}
/// <summary>
/// Raises the specified message using the default <see cref="TangoMessenger"/>.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="message">The message.</param>
protected void RaiseMessage<T>(T message) where T : class
{
TangoMessenger.Default.Send<T>(message);
}
/// <summary>
/// Registers a message handle for the specified message type T.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="handler">The handler.</param>
protected void RegisterForMessage<T>(Action<T> handler)
{
TangoMessenger.Default.Register<T>(handler);
}
/// <summary>
/// Called before the navigation system navigates from this object.
/// Return false to abort the navigation.
/// </summary>
/// <returns></returns>
public virtual Task<bool> OnNavigateOutRequest()
{
return Task.FromResult(true);
}
/// <summary>
/// Called before the navigation system navigates back from this object.
/// Return false to abort the navigation.
/// </summary>
/// <returns></returns>
public virtual Task<bool> OnNavigateBackRequest()
{
return Task.FromResult(true);
}
}
/// <summary>
/// Represents a PPC view model base class a View property as an instance of a <see cref="IPPCView"/> contract.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <seealso cref="Tango.SharedUI.ViewModel" />
public abstract class PPCViewModel<T> : PPCViewModel where T : IPPCView
{
/// <summary>
/// Gets the IPPCView instance.
/// </summary>
public T View { get; private set; }
/// <summary>
/// Gets a value indicating whether the instance of IPPCView is available.
/// </summary>
public bool ViewAttached { get; private set; }
/// <summary>
/// Called when the application has been started.
/// </summary>
public override void OnApplicationStarted()
{
TangoIOC.Default.GetInstanceWhenAvailable<T>((view) =>
{
ViewAttached = true;
View = view;
OnViewAttached();
});
}
/// <summary>
/// Called when the instance of IPPCView is available.
/// </summary>
public virtual void OnViewAttached()
{
}
}
}
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