public static void UpdateFlyoutVerticalScrollMode(this MauiNavigationView navigationView, ScrollMode scrollMode)
{
var scrollViewer = navigationView.MenuItemsScrollViewer;
if (scrollViewer != null)
{
switch (scrollMode)
{
case ScrollMode.Disabled:
scrollViewer.VerticalScrollMode = WScrollMode.Disabled;
scrollViewer.VerticalScrollBarVisibility = Microsoft.UI.Xaml.Controls.ScrollBarVisibility.Hidden;
break;
case ScrollMode.Enabled:
scrollViewer.VerticalScrollMode = WScrollMode.Enabled;
scrollViewer.VerticalScrollBarVisibility = Microsoft.UI.Xaml.Controls.ScrollBarVisibility.Visible;
break;
default:
scrollViewer.VerticalScrollMode = WScrollMode.Auto;
scrollViewer.VerticalScrollBarVisibility = Microsoft.UI.Xaml.Controls.ScrollBarVisibility.Auto;
break;
}
}
}
public static void UpdateTopNavigationViewItemBackgroundSelectedColor(this MauiNavigationView navigationView, Paint?paint)
{
var brush = paint?.ToPlatform();
if (navigationView.TopNavArea != null)
{
if (brush is null)
{
navigationView.TopNavArea.Resources.Remove("TopNavigationViewItemBackgroundSelected");
navigationView.TopNavArea.Resources.Remove("TopNavigationViewItemBackgroundSelectedPointerOver");
navigationView.TopNavArea.Resources.Remove("TopNavigationViewItemBackgroundSelectedPressed");
}
else
{
navigationView.TopNavArea.Resources["TopNavigationViewItemBackgroundSelected"] = brush;
navigationView.TopNavArea.Resources["TopNavigationViewItemBackgroundSelectedPointerOver"] = brush;
navigationView.TopNavArea.Resources["TopNavigationViewItemBackgroundSelectedPressed"] = brush;
}
}
if (navigationView.MenuItemsSource is IList <NavigationViewItemViewModel> items)
{
foreach (var item in items)
{
item.SelectedBackground = brush;
}
}
}
public static void UpdateFlyoutBehavior(this MauiNavigationView navigationView, IFlyoutView flyoutView)
{
switch (flyoutView.FlyoutBehavior)
{
case FlyoutBehavior.Flyout:
navigationView.IsPaneToggleButtonVisible = true;
// Workaround for
// https://github.com/microsoft/microsoft-ui-xaml/issues/6493
navigationView.PaneDisplayMode = NavigationViewPaneDisplayMode.LeftCompact;
navigationView.PaneDisplayMode = NavigationViewPaneDisplayMode.LeftMinimal;
break;
case FlyoutBehavior.Locked:
navigationView.PaneDisplayMode = NavigationViewPaneDisplayMode.Left;
navigationView.IsPaneToggleButtonVisible = false;
break;
case FlyoutBehavior.Disabled:
navigationView.PaneDisplayMode = NavigationViewPaneDisplayMode.LeftMinimal;
navigationView.IsPaneToggleButtonVisible = false;
navigationView.IsPaneOpen = false;
break;
}
if (navigationView is RootNavigationView rootNavigationView)
{
rootNavigationView.UpdateFlyoutPanelMargin();
}
}
public virtual void Connect(IView view)
{
var nativeView = view.ToNative(_mauiContext);
NavigationView rootNavigationView;
if (nativeView is NavigationView nv)
{
rootNavigationView = nv;
_rootView.Content = nativeView;
}
else
{
rootNavigationView = new MauiNavigationView();
rootNavigationView.Content = nativeView;
_rootView.Content = rootNavigationView;
}
var nativeWindow = _mauiContext.GetNativeWindow();
nativeWindow.Activated += OnWindowActivated;
UpdateAppTitleBar(true);
SetWindowTitle(_mauiContext.GetNativeWindow().GetWindow()?.Title);
}
public static void UpdateFlyoutWidth(this MauiNavigationView navigationView, IFlyoutView flyoutView)
{
if (flyoutView.FlyoutWidth >= 0)
{
navigationView.OpenPaneLength = flyoutView.FlyoutWidth;
}
else
{
navigationView.OpenPaneLength = 320;
}
// At some point this Template Setting is going to show up with a bump to winui
//handler.PlatformView.OpenPaneLength = handler.PlatformView.TemplateSettings.OpenPaneWidth;
}
public static void UpdateTopNavAreaBackground(this MauiNavigationView navigationView, Paint?paint)
{
// Background property is set via {ThemeResource NavigationViewTopPaneBackground} in the Control Template
// AFAICT you can't modify properties set by ThemeResource at runtime so we have to just update this value directly
if (paint != null)
{
navigationView.TopNavArea?.UpdateBackground(paint, null);
}
else if (Application.Current.Resources.TryGetValue("NavigationViewTopPaneBackground", out object value) && value is WBrush brush)
{
navigationView.TopNavArea?.UpdateBackground(null, brush);
}
}
public static void UpdatePaneBackground(this MauiNavigationView navigationView, Paint?paint)
{
var rootSplitView = navigationView.RootSplitView;
var brush = paint?.ToPlatform();
if (brush == null)
{
object?color = null;
if (navigationView.IsPaneOpen)
{
color = navigationView.Resources["NavigationViewExpandedPaneBackground"];
}
else
{
color = navigationView.Resources["NavigationViewDefaultPaneBackground"];
}
if (rootSplitView != null)
{
if (color is WBrush colorBrush)
{
rootSplitView.PaneBackground = colorBrush;
}
else if (color is global::Windows.UI.Color uiColor)
{
rootSplitView.PaneBackground = new WSolidColorBrush(uiColor);
}
}
}
else
{
if (rootSplitView != null)
{
rootSplitView.PaneBackground = brush;
}
}
}
public NavigationRootManager(IMauiContext mauiContext)
{
_mauiContext = mauiContext;
_navigationView = new MauiNavigationView();
_navigationView.BackRequested += OnBackRequested;
}
