protected virtual void UpdateToolbar()
{
ActionBarDrawerToggle toggle = _drawerToggle;
if (Toolbar == null || NavigationStack.Count == 0 || CurrentPage == null || VirtualView == null)
{
return;
}
bool isNavigated = NavigationStack.Count > 1;
Page currentPage = CurrentPage;
_defaultNavigationIcon ??= Toolbar.NavigationIcon;
if (isNavigated)
{
if (NavigationPage.GetHasBackButton(currentPage))
{
Toolbar.NavigationIcon ??= _defaultNavigationIcon;
if (toggle != null)
{
toggle.DrawerIndicatorEnabled = false;
toggle.SyncState();
}
var prevPage = (Page)NavigationStack[NavigationStack.Count - 2];
var backButtonTitle = NavigationPage.GetBackButtonTitle(prevPage);
ImageSource image = NavigationPage.GetTitleIconImageSource(currentPage);
if (!string.IsNullOrEmpty(backButtonTitle))
{
Toolbar.NavigationContentDescription = backButtonTitle;
}
else if (image == null ||
Toolbar.SetNavigationContentDescription(image) == null)
{
Toolbar.SetNavigationContentDescription(Resource.String.nav_app_bar_navigate_up_description);
}
}
else if (toggle != null && _flyoutPage != null)
{
toggle.DrawerIndicatorEnabled = _flyoutPage.ShouldShowToolbarButton();
toggle.SyncState();
}
else
{
Toolbar.NavigationIcon = null;
}
}
else
{
if (toggle != null && _flyoutPage != null)
{
toggle.DrawerIndicatorEnabled = _flyoutPage.ShouldShowToolbarButton();
toggle.SyncState();
Toolbar.SetNavigationContentDescription(Resource.String.nav_app_bar_open_drawer_description);
}
}
Color tintColor = NavigationView.BarBackgroundColor;
if (tintColor == null)
{
Toolbar.BackgroundTintMode = null;
}
else
{
Toolbar.BackgroundTintMode = PorterDuff.Mode.Src;
Toolbar.BackgroundTintList = ColorStateList.ValueOf(tintColor.ToNative());
}
Brush barBackground = NavigationView.BarBackground;
Toolbar.UpdateBackground(barBackground);
Color textColor = NavigationView.BarTextColor;
if (textColor != null)
{
Toolbar.SetTitleTextColor(textColor.ToNative().ToArgb());
}
Color navIconColor = NavigationPage.GetIconColor(CurrentPage);
if (navIconColor != null && Toolbar.NavigationIcon != null)
{
DrawableExtensions.SetColorFilter(Toolbar.NavigationIcon, navIconColor, FilterMode.SrcAtop);
}
Toolbar.Title = currentPage?.Title ?? string.Empty;
if (Toolbar.NavigationIcon != null && textColor != null)
{
var icon = this.Toolbar.NavigationIcon as DrawerArrowDrawable;
if (icon != null)
{
icon.Color = textColor.ToNative().ToArgb();
}
}
UpdateTitleIcon();
UpdateTitleView();
UpdateToolbarVisibility();
}
void RegisterToolbar()
{
Context context = NavigationLayout.Context;
AToolbar bar = Toolbar;
Element page = NavigationView.RealParent;
_flyoutPage = null;
while (page != null)
{
if (page is FlyoutPage)
{
_flyoutPage = page as FlyoutPage;
break;
}
page = page.RealParent;
}
if (_flyoutPage == null)
{
if (PageController.InternalChildren.Count > 0)
{
_flyoutPage = PageController.InternalChildren[0] as FlyoutPage;
}
if (_flyoutPage == null)
{
return;
}
}
if (((IFlyoutPageController)_flyoutPage).ShouldShowSplitMode)
{
return;
}
var renderer = _flyoutPage.ToNative(NavigationView.Handler.MauiContext) as DrawerLayout;
if (renderer == null)
{
return;
}
_drawerLayout = renderer;
AutomationPropertiesProvider.GetDrawerAccessibilityResources(context, _flyoutPage, out int resourceIdOpen, out int resourceIdClose);
if (_drawerToggle != null)
{
_drawerToggle.ToolbarNavigationClickListener = null;
_drawerToggle.Dispose();
}
_drawerToggle = new ActionBarDrawerToggle(context.GetActivity(), _drawerLayout, bar,
resourceIdOpen == 0 ? global::Android.Resource.String.Ok : resourceIdOpen,
resourceIdClose == 0 ? global::Android.Resource.String.Ok : resourceIdClose)
{
ToolbarNavigationClickListener = new ClickListener(NavigationView)
};
if (_drawerListener != null)
{
_drawerLayout.RemoveDrawerListener(_drawerListener);
_drawerListener.Dispose();
}
_drawerListener = new DrawerMultiplexedListener {
Listeners = { _drawerToggle, (DrawerLayout.IDrawerListener)_drawerLayout }
};
_drawerLayout.AddDrawerListener(_drawerListener);
}
