public override void SetContentView(int layoutResID)
{
if (drawerLayout != null)
{
LayoutInflater inflater = (LayoutInflater)GetSystemService(LayoutInflaterService);
ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.MatchParent,
ViewGroup.LayoutParams.MatchParent);
View stubView = inflater.Inflate(layoutResID, drawerLayout, false);
drawerLayout.AddView(stubView, lp);
}
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Create the UI
var v = OnCreateMainView(savedInstanceState);
_drawer = new DrawerLayout(this);
_drawer.AddView(v,
new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MatchParent, ViewGroup.LayoutParams.MatchParent));
AddContentView(_drawer,
new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MatchParent, ViewGroup.LayoutParams.MatchParent));
// prep drawer if needed
var navigationView = new NavigationView(this);
var menu = navigationView.Menu;
if (OnPrepareSideMenu(menu))
{
navigationView.SetNavigationItemSelectedListener(this);
_drawer.AddView(navigationView,
new DrawerLayout.LayoutParams(ViewGroup.LayoutParams.WrapContent,
ViewGroup.LayoutParams.MatchParent, (int)GravityFlags.Start));
// set the header
var header = OnCreateMenuHeaderView(LayoutInflater.From(this));
if (header != null)
{
navigationView.AddHeaderView(header);
}
// fetch the theme...
var a = new TypedValue();
Theme.ResolveAttribute(global::Android.Resource.Attribute.ColorBackground, a, true);
if (a.Type >= DataType.FirstColorInt && a.Type <= DataType.LastColorInt)
{
navigationView.SetBackgroundColor(new global::Android.Graphics.Color(a.Data));
}
// notify when drawer opens / closes
_drawerToggle = OnCreateDrawerToggle(this, _drawer);
_drawer.AddDrawerListener(_drawerToggle);
SupportActionBar.SetDisplayHomeAsUpEnabled(true);
SupportActionBar.SetHomeButtonEnabled(true);
}
}
void LayoutSideBySide()
{
var flyoutView = _flyoutView;
if (MauiContext == null || _navigationRoot == null || flyoutView == null)
{
return;
}
if (_sideBySideView == null)
{
_sideBySideView = new LinearLayoutCompat(Context)
{
Orientation = LinearLayoutCompat.Horizontal,
LayoutParameters = new DrawerLayout.LayoutParams(
DrawerLayout.LayoutParams.MatchParent,
DrawerLayout.LayoutParams.MatchParent)
};
}
if (_navigationRoot.Parent != _sideBySideView)
{
_navigationRoot.RemoveFromParent();
var layoutParameters =
new LinearLayoutCompat.LayoutParams(
LinearLayoutCompat.LayoutParams.MatchParent,
LinearLayoutCompat.LayoutParams.MatchParent,
1);
_sideBySideView.AddView(_navigationRoot, layoutParameters);
UpdateDetailsFragmentView();
}
if (flyoutView.Parent != _sideBySideView)
{
// When the Flyout is acting as a flyout Android will set the Visibilty to GONE when it's off screen
// This makes sure it's visible
flyoutView.Visibility = ViewStates.Visible;
flyoutView.RemoveFromParent();
var layoutParameters =
new LinearLayoutCompat.LayoutParams(
(int)FlyoutWidth,
LinearLayoutCompat.LayoutParams.MatchParent,
0);
_sideBySideView.AddView(flyoutView, 0, layoutParameters);
}
if (_sideBySideView.Parent != PlatformView)
{
DrawerLayout.AddView(_sideBySideView);
}
if (VirtualView is IToolbarElement te && te.Toolbar?.Handler is ToolbarHandler th)
{
th.SetupWithDrawerLayout(null);
}
}
void LayoutAsFlyout()
{
var flyoutView = _flyoutView;
if (MauiContext == null || _navigationRoot == null || flyoutView == null)
{
return;
}
_sideBySideView?.RemoveAllViews();
_sideBySideView?.RemoveFromParent();
if (_navigationRoot.Parent != PlatformView)
{
_navigationRoot.RemoveFromParent();
var layoutParameters =
new LinearLayoutCompat.LayoutParams(
LinearLayoutCompat.LayoutParams.MatchParent,
LinearLayoutCompat.LayoutParams.MatchParent);
DrawerLayout.AddView(_navigationRoot, 0, layoutParameters);
}
UpdateDetailsFragmentView();
if (flyoutView.Parent != PlatformView)
{
flyoutView.RemoveFromParent();
var layoutParameters =
new DrawerLayout.LayoutParams(
(int)FlyoutWidth,
DrawerLayout.LayoutParams.MatchParent,
(int)GravityFlags.Start);
// Flyout has to get added after the content otherwise clicking anywhere
// on the flyout will cause it to close and gesture
// recognizers inside the flyout won't fire
DrawerLayout.AddView(flyoutView, layoutParameters);
}
DrawerLayout.CloseDrawer(flyoutView);
if (VirtualView is IToolbarElement te && te.Toolbar?.Handler is ToolbarHandler th)
{
th.SetupWithDrawerLayout(DrawerLayout);
}
}