public ShellSectionNavigation(IFlyoutController flyoutController, ShellSection section) : base(Forms.NativeParent)
{
_section = section;
_section.PropertyChanged += OnSectionPropertyChanged;
_rootPage = ((IShellContentController)_section.CurrentItem).GetOrCreateContent();
_navBar = new ShellNavBar(flyoutController, this);
_navBar.Show();
var renderer = CreateShellSection(section);
renderer.Control.Show();
_navigationStack.AddLast(renderer.Control);
_pageToNative[_rootPage] = renderer.Control;
_nativeToPage[renderer.Control] = _rootPage;
IShellSectionController controller = _section as IShellSectionController;
controller.NavigationRequested += OnNavigationRequested;
controller.AddDisplayedPageObserver(this, UpdateDisplayedPage);
PackEnd(_navBar);
PackEnd(renderer.Control);
LayoutUpdated += OnLayoutUpdated;
((IShellController)_section.Parent.Parent).AddAppearanceObserver(this, _section);
}
void InitializeComponent()
{
SetAlignment(-1, -1);
SetWeight(1, 1);
SetLayoutCallback(OnLayout);
_viewStack = new SimpleViewStack(Forms.NativeParent);
if (Device.Idiom == TargetIdiom.Phone)
{
_viewStack.BackgroundColor = ElmSharp.Color.White;
}
_viewStack.Show();
PackEnd(_viewStack);
_navBar = new ShellNavBar();
_navBar.Show();
PackEnd(_navBar);
IShellSectionController controller = ShellSection;
controller.NavigationRequested += OnNavigationRequested;
controller.AddDisplayedPageObserver(this, UpdateDisplayedPage);
((IShellController)Shell.Current).AddAppearanceObserver(this, ShellSection);
((IShellController)Shell.Current).AddFlyoutBehaviorObserver(_navBar);
_shellSectionRenderer = CreateShellSectionRenderer(ShellSection);
_shellSectionRenderer.NativeView.Show();
_viewStack.Push(_shellSectionRenderer.NativeView);
Device.BeginInvokeOnMainThread(() =>
{
(_shellSectionRenderer.NativeView as Widget)?.SetFocus(true);
});
}
protected virtual void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
if (disposing)
{
(Shell.Current as IShellController).RemoveAppearanceObserver(this);
(Shell.Current as IShellController).RemoveFlyoutBehaviorObserver(_navBar);
if (ShellSection != null)
{
IShellSectionController controller = ShellSection;
controller.NavigationRequested -= OnNavigationRequested;
controller.RemoveDisplayedPageObserver(this);
}
if (_currentPage != null)
{
_currentPage.PropertyChanged -= OnPagePropertyChanged;
}
if (_navBar != null)
{
_navBar.Dispose();
_navBar = null;
}
Unrealize();
}
_disposed = true;
}
public static double GetDefaultTitleFontSize(this ShellNavBar navBar)
{
if (s_shellNavBarTitleFontSize > 0)
{
return(s_shellNavBarTitleFontSize);
}
return(s_shellNavBarTitleFontSize = CalculateDoubleScaledSizeInLargeScreen(23));
}
public static double GetDefaultMargin(this ShellNavBar navBar)
{
if (s_shellNavBarDefaultMargin > 0)
{
return(s_shellNavBarDefaultMargin);
}
return(s_shellNavBarDefaultMargin = CalculateDoubleScaledSizeInLargeScreen(10));
}
public static double GetDefaultMenuSize(this ShellNavBar navBar)
{
if (s_shellNavBarDefaultMenuSize > 0)
{
return(s_shellNavBarDefaultMenuSize);
}
return(s_shellNavBarDefaultMenuSize = CalculateDoubleScaledSizeInLargeScreen(Device.Idiom == TargetIdiom.TV ? 70 : 40));
}
public static double GetDefaultHeight(this ShellNavBar navBar)
{
if (s_shellNavBarDefaultHeight > 0)
{
return(s_shellNavBarDefaultHeight);
}
return(s_shellNavBarDefaultHeight = CalculateDoubleScaledSizeInLargeScreen(70));
}
public static double GetDefaultMenuSize(this ShellNavBar navBar)
{
if (s_shellNavBarDefaultMenuSize > 0)
{
return(s_shellNavBarDefaultMenuSize);
}
return(s_shellNavBarDefaultMenuSize = CalculateDoubleScaledSizeInLargeScreen(40));
}