blob: 416ece24b79f48b4eb64482208f667773ac9079f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.Core.Commands;
using Tango.Core.DI;
using Tango.PPC.Common;
using Tango.PPC.Common.BackupRestore;
using Tango.PPC.UI.ViewsContracts;
namespace Tango.PPC.UI.ViewModels
{
public class BackupRestoreViewVM : PPCViewModel<IBackupRestoreView>
{
private Stack<BackupRestoreView> _navigation_history;
private BackupRestoreView _currentView;
private bool _canNavigateBack;
public enum BackupRestoreView
{
MainView,
BackupView,
RestoreView
}
[TangoInject]
public IBackupManager BackupManager { get; set; }
public RelayCommand<String> NavigateCommand { get; set; }
public RelayCommand NavigateBackCommand { get; set; }
public BackupRestoreViewVM()
{
NavigateCommand = new RelayCommand<string>(HandleNavigateCommand);
NavigateBackCommand = new RelayCommand(NavigateBack, () => _canNavigateBack);
_navigation_history = new Stack<BackupRestoreView>();
_canNavigateBack = true;
}
public override void OnNavigatedTo()
{
base.OnNavigatedTo();
_navigation_history = new Stack<BackupRestoreView>();
_currentView = BackupRestoreView.MainView;
}
private void HandleNavigateCommand(string view)
{
var v = (BackupRestoreView)Enum.Parse(typeof(BackupRestoreView), view);
NavigateTo(v);
}
private Task NavigateTo(BackupRestoreView view, bool pushHistory = true)
{
if (pushHistory)
{
_navigation_history.Push(_currentView);
}
_currentView = view;
return View.NavigateTo(view);
}
private async void NavigateBack()
{
_canNavigateBack = false;
InvalidateRelayCommands();
if (_navigation_history.Count > 0)
{
await NavigateTo(_navigation_history.Pop(), false);
}
else
{
await NavigationManager.NavigateBack();
}
_canNavigateBack = true;
InvalidateRelayCommands();
}
public override void OnApplicationStarted()
{
}
}
}
|
