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How to use LoadStateEventHandler method of AppUIBasics.Common.RootFrameNavigationHelper class

Best WinAppDriver code snippet using AppUIBasics.Common.RootFrameNavigationHelper.LoadStateEventHandler

NavigationHelper.cs

Source:NavigationHelper.cs

...79        /// Handle this event to populate the page using content passed80        /// during navigation as well as any state that was saved by81        /// the SaveState event handler.82        /// </summary>83        public event LoadStateEventHandler LoadState;84        /// <summary>85        /// Handle this event to save state that can be used by86        /// the LoadState event handler. Save the state in case87        /// the application is suspended or the page is discarded88        /// from the navigation cache.89        /// </summary>90        public event SaveStateEventHandler SaveState;91        /// <summary>92        /// Invoked when this page is about to be displayed in a Frame.93        /// This method calls <see cref="LoadState"/>, where all page specific94        /// navigation and process lifetime management logic should be placed.95        /// </summary>96        /// <param name="e">Event data that describes how this page was reached.  The Parameter97        /// property provides the group to be displayed.</param>98        public void OnNavigatedTo(NavigationEventArgs e)99        {100            var frameState = SuspensionManager.SessionStateForFrame(this.Frame);101            this._pageKey = "Page-" + this.Frame.BackStackDepth;102            if (e.NavigationMode == NavigationMode.New)103            {104                // Clear existing state for forward navigation when adding a new page to the105                // navigation stack106                var nextPageKey = this._pageKey;107                int nextPageIndex = this.Frame.BackStackDepth;108                while (frameState.Remove(nextPageKey))109                {110                    nextPageIndex++;111                    nextPageKey = "Page-" + nextPageIndex;112                }113                // Pass the navigation parameter to the new page114                this.LoadState?.Invoke(this, new LoadStateEventArgs(e.Parameter, null));115            }116            else117            {118                // Pass the navigation parameter and preserved page state to the page, using119                // the same strategy for loading suspended state and recreating pages discarded120                // from cache121                this.LoadState?.Invoke(this, new LoadStateEventArgs(e.Parameter, (Dictionary<string, object>)frameState[this._pageKey]));122            }123        }124        /// <summary>125        /// Invoked when this page will no longer be displayed in a Frame.126        /// This method calls <see cref="SaveState"/>, where all page specific127        /// navigation and process lifetime management logic should be placed.128        /// </summary>129        /// <param name="e">Event data that describes how this page was reached.  The Parameter130        /// property provides the group to be displayed.</param>131        public void OnNavigatedFrom(NavigationEventArgs e)132        {133            var frameState = SuspensionManager.SessionStateForFrame(this.Frame);134            var pageState = new Dictionary<string, object>();135            this.SaveState?.Invoke(this, new SaveStateEventArgs(pageState));136            frameState[_pageKey] = pageState;137        }138        #endregion139    }140    /// <summary>141    /// RootFrameNavigationHelper registers for standard mouse and keyboard142    /// shortcuts used to go back and forward. There should be only one143    /// RootFrameNavigationHelper per view, and it should be associated with the144    /// root frame.145    /// </summary>146    /// <example>147    /// To make use of RootFrameNavigationHelper, create an instance of the148    /// RootNavigationHelper such as in the constructor of your root page.149    /// <code>150    ///     public MyRootPage()151    ///     {152    ///         this.InitializeComponent();153    ///         this.rootNavigationHelper = new RootNavigationHelper(MyFrame);154    ///     }155    /// </code>156    /// </example>157    [Windows.Foundation.Metadata.WebHostHidden]158    public class RootFrameNavigationHelper159    {160        private Frame Frame { get; set; }161        SystemNavigationManager systemNavigationManager;162        private Microsoft.UI.Xaml.Controls.NavigationView CurrentNavView { get; set; }163        /// <summary>164        /// Initializes a new instance of the <see cref="RootNavigationHelper"/> class.165        /// </summary>166        /// <param name="rootFrame">A reference to the top-level frame.167        /// This reference allows for frame manipulation and to register navigation handlers.</param>168        public RootFrameNavigationHelper(Frame rootFrame, Microsoft.UI.Xaml.Controls.NavigationView currentNavView)169        {170            this.Frame = rootFrame;171            this.Frame.Navigated += (s, e) =>172            {173                // Update the Back button whenever a navigation occurs.174                UpdateBackButton();175            };176            this.CurrentNavView = currentNavView;177            // Handle keyboard and mouse navigation requests178            this.systemNavigationManager = SystemNavigationManager.GetForCurrentView();179            systemNavigationManager.BackRequested += SystemNavigationManager_BackRequested;180            // must register back requested on navview181            if (ApiInformation.IsApiContractPresent("Windows.Foundation.UniversalApiContract", 6))182            {183                CurrentNavView.BackRequested += NavView_BackRequested;184            }185            // Listen to the window directly so we will respond to hotkeys regardless186            // of which element has focus.187            Window.Current.CoreWindow.Dispatcher.AcceleratorKeyActivated +=188                CoreDispatcher_AcceleratorKeyActivated;189            Window.Current.CoreWindow.PointerPressed +=190                this.CoreWindow_PointerPressed;191        }192        private void NavView_BackRequested(Microsoft.UI.Xaml.Controls.NavigationView sender, Microsoft.UI.Xaml.Controls.NavigationViewBackRequestedEventArgs args)193        {194            TryGoBack();195        }196        private bool TryGoBack()197        {198            // don't go back if the nav pane is overlayed199            if (this.CurrentNavView.IsPaneOpen && (this.CurrentNavView.DisplayMode == Microsoft.UI.Xaml.Controls.NavigationViewDisplayMode.Compact || this.CurrentNavView.DisplayMode == Microsoft.UI.Xaml.Controls.NavigationViewDisplayMode.Minimal))200            {201                return false;202            }203            bool navigated = false;204            if (this.Frame.CanGoBack)205            {206                this.Frame.GoBack();207                navigated = true;208            }209            210            return navigated;211        }212        private bool TryGoForward()213        {214            bool navigated = false;215            if (this.Frame.CanGoForward)216            {217                this.Frame.GoForward();218                navigated = true;219            }220            return navigated;221        }222        private void SystemNavigationManager_BackRequested(object sender, BackRequestedEventArgs e)223        {224            if (!e.Handled)225            {226                e.Handled = TryGoBack();227            }228        }229        private void UpdateBackButton()230        {231            if (ApiInformation.IsApiContractPresent("Windows.Foundation.UniversalApiContract", 6))232            {233                this.CurrentNavView.IsBackEnabled = this.Frame.CanGoBack ? true : false;234            } else235            {236                systemNavigationManager.AppViewBackButtonVisibility = this.Frame.CanGoBack ? AppViewBackButtonVisibility.Visible : AppViewBackButtonVisibility.Collapsed;237            }238            239        }240        /// <summary>241        /// Invoked on every keystroke, including system keys such as Alt key combinations.242        /// Used to detect keyboard navigation between pages even when the page itself243        /// doesn't have focus.244        /// </summary>245        /// <param name="sender">Instance that triggered the event.</param>246        /// <param name="e">Event data describing the conditions that led to the event.</param>247        private void CoreDispatcher_AcceleratorKeyActivated(CoreDispatcher sender,248            AcceleratorKeyEventArgs e)249        {250            var virtualKey = e.VirtualKey;251            // Only investigate further when Left, Right, or the dedicated Previous or Next keys252            // are pressed253            if ((e.EventType == CoreAcceleratorKeyEventType.SystemKeyDown ||254                e.EventType == CoreAcceleratorKeyEventType.KeyDown) &&255                (virtualKey == VirtualKey.Left || virtualKey == VirtualKey.Right ||256                (int)virtualKey == 166 || (int)virtualKey == 167))257            {258                var coreWindow = Window.Current.CoreWindow;259                var downState = CoreVirtualKeyStates.Down;260                bool menuKey = (coreWindow.GetKeyState(VirtualKey.Menu) & downState) == downState;261                bool controlKey = (coreWindow.GetKeyState(VirtualKey.Control) & downState) == downState;262                bool shiftKey = (coreWindow.GetKeyState(VirtualKey.Shift) & downState) == downState;263                bool noModifiers = !menuKey && !controlKey && !shiftKey;264                bool onlyAlt = menuKey && !controlKey && !shiftKey;265                if (((int)virtualKey == 166 && noModifiers) ||266                    (virtualKey == VirtualKey.Left && onlyAlt))267                {268                    // When the previous key or Alt+Left are pressed navigate back269                    e.Handled = TryGoBack();270                }271                else if (((int)virtualKey == 167 && noModifiers) ||272                    (virtualKey == VirtualKey.Right && onlyAlt))273                {274                    // When the next key or Alt+Right are pressed navigate forward275                    e.Handled = TryGoForward();276                }277            }278        }279        /// <summary>280        /// Invoked on every mouse click, touch screen tap, or equivalent interaction.281        /// Used to detect browser-style next and previous mouse button clicks282        /// to navigate between pages.283        /// </summary>284        /// <param name="sender">Instance that triggered the event.</param>285        /// <param name="e">Event data describing the conditions that led to the event.</param>286        private void CoreWindow_PointerPressed(CoreWindow sender,287            PointerEventArgs e)288        {289            var properties = e.CurrentPoint.Properties;290            // Ignore button chords with the left, right, and middle buttons291            if (properties.IsLeftButtonPressed || properties.IsRightButtonPressed ||292                properties.IsMiddleButtonPressed)293                return;294            // If back or forward are pressed (but not both) navigate appropriately295            bool backPressed = properties.IsXButton1Pressed;296            bool forwardPressed = properties.IsXButton2Pressed;297            if (backPressed ^ forwardPressed)298            {299                e.Handled = true;300                if (backPressed) this.TryGoBack();301                if (forwardPressed) this.TryGoForward();302            }303        }304    }305    /// <summary>306    /// Represents the method that will handle the <see cref="NavigationHelper.LoadState"/>event307    /// </summary>308    public delegate void LoadStateEventHandler(object sender, LoadStateEventArgs e);309    /// <summary>310    /// Represents the method that will handle the <see cref="NavigationHelper.SaveState"/>event311    /// </summary>312    public delegate void SaveStateEventHandler(object sender, SaveStateEventArgs e);313    /// <summary>314    /// Class used to hold the event data required when a page attempts to load state.315    /// </summary>316    public class LoadStateEventArgs : EventArgs317    {318        /// <summary>319        /// The parameter value passed to <see cref="Frame.Navigate(Type, object)"/>320        /// when this page was initially requested.321        /// </summary>322        public object NavigationParameter { get; private set; }...

LoadStateEventHandler

Using AI Code Generation

1using Windows.UI.Xaml;2using Windows.UI.Xaml.Controls;3using Windows.UI.Xaml.Navigation;4{5    {6        public event LoadStateEventHandler LoadState;7        public event SaveStateEventHandler SaveState;8        public RootFrameNavigationHelper(Frame frame)9        {10            frame.Loaded += (sender, e) =>11            {12                frame.Navigated += (s, e) => RestoreState(e.Parameter);13                if (frame.Content == null)14                    frame.Navigate(typeof(BlankPage1), null);15                    RestoreState(frame.Content);16            };17        }18        private void RestoreState(object navigationParameter)19        {20            var frameState = SuspensionManager.SessionStateForFrame(Window.Current.Content as Frame);21            var pageState = frameState.ContainsKey(navigationParameter.ToString()) ? (frameState[navigationParameter.ToString()] as Dictionary<string, object>) : null;22            LoadState?.Invoke(Window.Current.Content as Page, pageState);23        }24        public void SaveState(object navigationParameter)25        {26            var frameState = SuspensionManager.SessionStateForFrame(Window.Current.Content as Frame);27            var pageState = new Dictionary<string, object>();28            SaveState?.Invoke(Window.Current.Content as Page, pageState);29            frameState[navigationParameter.ToString()] = pageState;30        }31    }32    public delegate void LoadStateEventHandler(object sender, Dictionary<string, object> pageState);33    public delegate void SaveStateEventHandler(object sender, Dictionary<string, object> pageState);34}35using Windows.UI.Xaml;36using Windows.UI.Xaml.Controls;37using Windows.UI.Xaml.Navigation;38{39    {40        public event LoadStateEventHandler LoadState;41        public event SaveStateEventHandler SaveState;42        public RootFrameNavigationHelper(Frame frame)43        {44            frame.Loaded += (sender, e) =>45            {46                frame.Navigated += (s,

LoadStateEventHandler

Using AI Code Generation

1protected override void OnNavigatedTo(NavigationEventArgs e)2{3    if (e.NavigationMode == NavigationMode.New)4    {5        AppUIBasics.Common.RootFrameNavigationHelper.LoadState(e.Parameter, null);6    }7}8protected override void OnNavigatedFrom(NavigationEventArgs e)9{10    if (e.NavigationMode == NavigationMode.Back)11    {12        AppUIBasics.Common.RootFrameNavigationHelper.SaveState(null);13    }14}15protected override void OnNavigatedFrom(NavigationEventArgs e)16{17    if (e.NavigationMode == NavigationMode.New)18    {19        AppUIBasics.Common.RootFrameNavigationHelper.Clear();20    }21}22protected override void OnNavigatedFrom(NavigationEventArgs e)23{24    if (e.NavigationMode == NavigationMode.Back)25    {26        string navigationState = AppUIBasics.Common.RootFrameNavigationHelper.GetNavigationState();27    }28}29protected override void OnNavigatedTo(NavigationEventArgs e)30{31    if (e.NavigationMode == NavigationMode.New)32    {33        string navigationState = "string";34        AppUIBasics.Common.RootFrameNavigationHelper.SetNavigationState(navigationState);35    }36}37protected override void OnNavigatedFrom(NavigationEventArgs e)38{

LoadStateEventHandler

Using AI Code Generation

1{2    {3        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart;4        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart2;5        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart3;6        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart4;7        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart5;8        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart6;9        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart7;10        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart8;11        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart9;12        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart10;13        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart11;14        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart12;15        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart13;16        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart14;17        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart15;18        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart16;19        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart17;20        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart18;21        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart19;22        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart20;23        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart21;24        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart22;25        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart23;26        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart24;27        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart25;28        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart26;29        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart27;30        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart28;31        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart29;32        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart30;33        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart31;34        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart32;35        private WinRTXamlToolkit.Controls.DataVisualization.Charting.Chart chart33;

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