How to use SaveStateEventHandler method of AppUIBasics.Common.NavigationHelper class

Best WinAppDriver code snippet using AppUIBasics.Common.NavigationHelper.SaveStateEventHandler

NavigationHelper.cs

Source:NavigationHelper.cs Github

copy

Full Screen

...86 /// 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; }323 /// <summary>324 /// A dictionary of state preserved by this page during an earlier325 /// session. This will be null the first time a page is visited.326 /// </summary>...

Full Screen

Full Screen

SaveStateEventHandler

Using AI Code Generation

copy

Full Screen

1using AppUIBasics.Common;2using Windows.UI.Xaml.Controls;3using Windows.UI.Xaml.Navigation;4{5 {6 private NavigationHelper navigationHelper;7 public Scenario4()8 {9 this.InitializeComponent();10 navigationHelper = new NavigationHelper(this);11 navigationHelper.SaveState += navigationHelper_SaveState;12 }13 void navigationHelper_SaveState(object sender, SaveStateEventArgs e)14 {

Full Screen

Full Screen

SaveStateEventHandler

Using AI Code Generation

copy

Full Screen

1{2 private NavigationHelper navigationHelper;3 public MainPage()4 {5 this.InitializeComponent();6 this.navigationHelper = new NavigationHelper(this);7 this.navigationHelper.LoadState += this.NavigationHelper_LoadState;8 this.navigationHelper.SaveState += this.NavigationHelper_SaveState;9 }10 private void NavigationHelper_LoadState(object sender, LoadStateEventArgs e)11 {

Full Screen

Full Screen

SaveStateEventHandler

Using AI Code Generation

copy

Full Screen

1protected override void OnNavigatedFrom(NavigationEventArgs e)2{3 navigationHelper.OnNavigatedFrom(e);4}5protected override void OnNavigatedTo(NavigationEventArgs e)6{7 navigationHelper.OnNavigatedTo(e);8}9private void NavigationHelper_SaveState(object sender, SaveStateEventArgs e)10{11}12private void NavigationHelper_LoadState(object sender, LoadStateEventArgs e)13{14}15private void BackButton_Click(object sender, RoutedEventArgs e)16{17 if (navigationHelper.CanGoBack())18 {19 navigationHelper.GoBack();20 }21}22private void ForwardButton_Click(object sender, RoutedEventArgs e)23{24 if (navigationHelper.CanGoForward())25 {26 navigationHelper.GoForward();27 }28}29private void NavigationHelper_LoadState(object sender, LoadStateEventArgs e)30{

Full Screen

Full Screen

SaveStateEventHandler

Using AI Code Generation

copy

Full Screen

1protected override void OnNavigatedTo(NavigationEventArgs e)2{3 navigationHelper.OnNavigatedTo(e);4}5protected override void OnNavigatedFrom(NavigationEventArgs e)6{7 navigationHelper.OnNavigatedFrom(e);8}9private void navigationHelper_LoadState(object sender, LoadStateEventArgs e)10{11 if (e.PageState != null && e.PageState.ContainsKey("SelectedItem"))12 {13 var selectedItem = (SampleDataItem)e.PageState["SelectedItem"];14 navigationHelper.GoBackCommand.RaiseCanExecuteChanged();15 }16}17private void navigationHelper_SaveState(object sender, SaveStateEventArgs e)18{19 e.PageState["SelectedItem"] = 0;20}21private void navigationHelper_LoadState(object sender, LoadStateEventArgs e)22{23 if (e.PageState != null && e.PageState.ContainsKey("SelectedItem"))24 {25 var selectedItem = (SampleDataItem)e.PageState["SelectedItem"];26 navigationHelper.GoBackCommand.RaiseCanExecuteChanged();27 }28}29private void navigationHelper_SaveState(object sender, SaveStateEventArgs e)30{31 e.PageState["SelectedItem"] = 0;32}33private void navigationHelper_LoadState(object sender, LoadStateEventArgs e)34{35 if (e.PageState != null && e.PageState.ContainsKey("SelectedItem"))36 {37 var selectedItem = (SampleDataItem)e.PageState["SelectedItem"];38 navigationHelper.GoBackCommand.RaiseCanExecuteChanged();39 }40}

Full Screen

Full Screen

SaveStateEventHandler

Using AI Code Generation

copy

Full Screen

1{2 private readonly NavigationHelper navigationHelper;3 private readonly ObservableDictionary defaultViewModel = new ObservableDictionary();4 public SplitPage()5 {6 this.InitializeComponent();7 this.navigationHelper = new NavigationHelper(this);8 this.navigationHelper.LoadState += navigationHelper_LoadState;9 this.navigationHelper.SaveState += navigationHelper_SaveState;10 }11 {12 get { return this.navigationHelper; }13 }14 {15 get { return this.defaultViewModel; }16 }17 private void navigationHelper_LoadState(object sender, LoadStateEventArgs e)18 {

Full Screen

Full Screen

SaveStateEventHandler

Using AI Code Generation

copy

Full Screen

1protected override void OnNavigatedFrom(NavigationEventArgs e)2{3 base.OnNavigatedFrom(e);4 navigationHelper.OnNavigatedFrom(e);5}6protected override void OnNavigatedTo(NavigationEventArgs e)7{8 base.OnNavigatedTo(e);9 navigationHelper.OnNavigatedTo(e);10}11protected override void OnNavigatedFrom(NavigationEventArgs e)12{13 base.OnNavigatedFrom(e);14 navigationHelper.OnNavigatedFrom(e);15}16protected override void OnNavigatedTo(NavigationEventArgs e)17{18 base.OnNavigatedTo(e);19 navigationHelper.OnNavigatedTo(e);20}21protected override void OnNavigatedFrom(NavigationEventArgs e)22{23 base.OnNavigatedFrom(e);24 navigationHelper.OnNavigatedFrom(e);25}26protected override void OnNavigatedTo(NavigationEventArgs e)27{28 base.OnNavigatedTo(e);29 navigationHelper.OnNavigatedTo(e);30}31protected override void OnNavigatedFrom(NavigationEventArgs e)32{33 base.OnNavigatedFrom(e);34 navigationHelper.OnNavigatedFrom(e);35}36protected override void OnNavigatedTo(NavigationEventArgs e)37{38 base.OnNavigatedTo(e);39 navigationHelper.OnNavigatedTo(e);40}41protected override void OnNavigatedFrom(NavigationEventArgs e)42{43 base.OnNavigatedFrom(e);44 navigationHelper.OnNavigatedFrom(e);45}46protected override void OnNavigatedTo(NavigationEventArgs e)47{48 base.OnNavigatedTo(e);49 navigationHelper.OnNavigatedTo(e);50}

Full Screen

Full Screen

SaveStateEventHandler

Using AI Code Generation

copy

Full Screen

1using AppUIBasics.Common;2using AppUIBasics.Data;3using AppUIBasics.ViewModels;4using Windows.UI.Xaml.Controls;5using Windows.UI.Xaml.Navigation;6{7 {8 private NavigationHelper navigationHelper;9 private ObservableDictionary defaultViewModel = new ObservableDictionary();10 public ItemPage()11 {12 this.InitializeComponent();13 this.navigationHelper = new NavigationHelper(this);14 this.navigationHelper.LoadState += navigationHelper_LoadState;15 this.navigationHelper.SaveState += navigationHelper_SaveState;16 }17 {18 get { return this.defaultViewModel; }19 }20 {21 get { return this.navigationHelper; }22 }23 private void navigationHelper_LoadState(object sender, LoadStateEventArgs e)24 {

Full Screen

Full Screen

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.

LambdaTest Learning Hubs:

YouTube

You could also refer to video tutorials over LambdaTest YouTube channel to get step by step demonstration from industry experts.

Try LambdaTest Now !!

Get 100 minutes of automation test minutes FREE!!

Next-Gen App & Browser Testing Cloud

Was this article helpful?

Helpful

NotHelpful