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

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

NavigationHelper.cs

Source:NavigationHelper.cs Github

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...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; }...

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LoadStateEventHandler

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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,

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LoadStateEventHandler

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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{

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LoadStateEventHandler

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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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