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273
uniper_hmi/UniperHMI/MainWindowVM.cs
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273
uniper_hmi/UniperHMI/MainWindowVM.cs
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using CommunityToolkit.Mvvm.ComponentModel;
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using CommunityToolkit.Mvvm.Input;
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using CommunityToolkit.Mvvm.Messaging;
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using Heisig.HMI.AdsManager;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.DependencyInjection;
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using System.Windows;
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using System.Windows.Controls;
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using TcEventLoggerAdsProxyLib;
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namespace UniperHMI;
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public sealed partial class MainWindowVM : ObservableObject, IRecipient<NavigateMessage>, IDisposable
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{
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[ObservableProperty]
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private StringControlButtonVM dummyStringVM;
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[ObservableProperty]
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private Page currentPage;
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[ObservableProperty]
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private bool canNavigateBack;
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[ObservableProperty]
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private Visibility statusBarVisible;
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[ObservableProperty]
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private string breadcrumb;
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private readonly IAdsManager _adsManager;
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private readonly IConfiguration _config;
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private readonly TcEventLogger _eventlogger;
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// Last active event
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[ObservableProperty]
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private string currentActiveEvent = "";
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private readonly object _lock = new();
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// Empty page
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private readonly Page _emptyPage;
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// Last navigate message
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private readonly Stack<NavigateMessage> _messageStack = new();
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NavigateMessage? _currentMessage;
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// Events page view model
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[ObservableProperty]
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EventsPageVM _eventsPageVM;
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// Settings page viem model
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SettingsPageVM? _settingsPageVM;
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public MainWindowVM(IAdsManager adsManager, IConfiguration config, TcEventLogger eventLogger)
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{
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_adsManager = adsManager;
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_config = config;
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// Create dummy string
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DummyStringVM = new StringControlButtonVM();
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// Create empty page
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_emptyPage = new();
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// Create events page viewmodel
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_eventlogger = eventLogger;
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_eventsPageVM = new(_eventlogger);
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CurrentPage = _emptyPage;
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_currentMessage = new NavigateMessage("", typeof(Page));
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_messageStack.Push(_currentMessage);
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WeakReferenceMessenger.Default.Register<NavigateMessage>(this);
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breadcrumb = "";
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}
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[RelayCommand]
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private void SettingsWindow()
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{
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StatusBarVisible = Visibility.Visible;
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_messageStack.Clear();
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NavigateMessage message = new("", typeof(SettingsPage));
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Receive(message);
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}
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[RelayCommand]
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public void AutomaticModeClicked()
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{
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StatusBarVisible = Visibility.Visible;
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_messageStack.Clear();
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_currentMessage = new NavigateMessage("", typeof(Page));
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NavigateMessage message = new(_config["AutomaticModeVarName"]!, typeof(AutomaticModePage));
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Receive(message);
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}
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[RelayCommand]
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public void ManualModeClicked()
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{
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StatusBarVisible = Visibility.Visible;
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_messageStack.Clear();
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_currentMessage = new NavigateMessage("", typeof(Page));
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NavigateMessage message = new("", typeof(BatteryOverviewPage));
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Receive(message);
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}
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[RelayCommand]
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public void EventsListClicked()
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{
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StatusBarVisible = Visibility.Collapsed;
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_messageStack.Clear();
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_currentMessage = new NavigateMessage("", typeof(Page));
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NavigateMessage message = new("", typeof(EventsPage));
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Receive(message);
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}
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[RelayCommand]
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public void NavigateBack()
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{
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if (_messageStack.Count == 0)
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{
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CanNavigateBack = false;
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return;
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}
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_currentMessage = _messageStack.Pop();
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// Update if we can use the navigate back button
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if (_messageStack.Count > 0)
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CanNavigateBack = true;
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else
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{
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StatusBarVisible = Visibility.Visible;
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CanNavigateBack = false;
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}
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// Remove last two entrys from Breadcrumbs
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int index = -1;
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for (int i = 0; i < 2; i++)
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{
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index = Breadcrumb.LastIndexOf('>');
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if (index != -1)
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Breadcrumb = Breadcrumb[..index];
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}
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// Navigate to page
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Navigate(_currentMessage);
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}
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// Only use for forward traversal!
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public void Receive(NavigateMessage message)
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{
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// Only change page if its a new page type
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if (CurrentPage.GetType() == message.type)
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return;
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// Push current message
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if (_currentMessage != null)
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_messageStack.Push(_currentMessage);
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// Save current message for later push
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_currentMessage = message;
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// Set can navigate back
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CanNavigateBack = true;
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Navigate(message);
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}
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private void Navigate(NavigateMessage message)
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{
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// Dispose current pages viewmodel
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if (CurrentPage.DataContext is IDisposable viewModel)
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{
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CurrentPage.DataContext = null;
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viewModel.Dispose();
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}
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// Create new page
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switch (message.type.Name)
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{
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case nameof(AutomaticModePage):
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var automaticModeViewModel = (AutomaticModePageVM)ActivatorUtilities.CreateInstance(App.AppHost!.Services, typeof(AutomaticModePageVM), message.VariableName); //App.AppHost!.Services.GetRequiredService<AutomaticModePageVM>();
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AutomaticModePage automaticModePage = new() { DataContext = automaticModeViewModel };
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CurrentPage = automaticModePage;
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Breadcrumb = "> Automatic";
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break;
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case nameof(BatteryOverviewPage):
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var batteryOverviewPageVM = App.AppHost!.Services.GetRequiredService<BatteryOverviewPageVM>();
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BatteryOverviewPage batteryOverviewPage = new() { DataContext = batteryOverviewPageVM };
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CurrentPage = batteryOverviewPage;
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Breadcrumb = "> Manual";
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break;
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case nameof(StringOverviewPage):
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var stringOverviewVM = (StringOverviewPageVM)ActivatorUtilities.CreateInstance(App.AppHost!.Services, typeof(StringOverviewPageVM), message.VariableName);
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StringOverviewPage stringPage = new() { DataContext = stringOverviewVM };
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CurrentPage = stringPage;
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if (message.Header.Length > 0)
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AppendBreadcrumb(message.Header);
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break;
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case nameof(ModuleOverviewPage):
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var moduleOverviewVM = (ModuleOverviewPageVM)ActivatorUtilities.CreateInstance(App.AppHost!.Services, typeof(ModuleOverviewPageVM), message.VariableName);
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ModuleOverviewPage modulePage = new() { DataContext = moduleOverviewVM };
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CurrentPage = modulePage;
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if (message.Header.Length > 0)
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AppendBreadcrumb(message.Header);
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break;
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case nameof(UnitOverviewPage):
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var unitOverviewVM = (UnitOverviewPageVM)ActivatorUtilities.CreateInstance(App.AppHost!.Services, typeof(UnitOverviewPageVM), message.VariableName);
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unitOverviewVM.UnitName = message.Header;
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UnitOverviewPage unitPage = new() { DataContext = unitOverviewVM };
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CurrentPage = unitPage;
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if (message.Header.Length > 0)
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AppendBreadcrumb(message.Header);
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break;
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case nameof(EventsPage):
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#pragma warning disable MVVMTK0034 // Direct field reference to [ObservableProperty] backing field
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EventsPage eventsPage = new() { DataContext = _eventsPageVM };
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#pragma warning restore MVVMTK0034 // Direct field reference to [ObservableProperty] backing field
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CurrentPage = eventsPage;
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Breadcrumb = " > Events";
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break;
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case nameof(SettingsPage):
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// Create seetings page view model only once
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if (_settingsPageVM == null)
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_settingsPageVM = new(_adsManager, "GVL_CONFIG.stUnitConfig");
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SettingsPage settingsPage = new() { DataContext = _settingsPageVM };
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CurrentPage = settingsPage;
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Breadcrumb = " > Settings";
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break;
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default:
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CurrentPage = new Page();
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break;
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}
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}
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private void AppendBreadcrumb(string path)
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{
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if (Breadcrumb[^1] != ' ')
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Breadcrumb += " > " + path;
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else
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Breadcrumb += "> " + path;
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}
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[RelayCommand]
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private void AckAlarms()
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{
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_adsManager.WriteValue("GVL_SCADA.stAckAlarmsButton.xRequest", true);
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}
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public void Dispose()
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{
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// Dispose current pages viewmodel
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if (CurrentPage.DataContext is IDisposable viewModel)
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{
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CurrentPage.DataContext = null;
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viewModel.Dispose();
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}
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DummyStringVM.Dispose();
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}
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}
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