hasDrawer static method
Whether the Scaffold that most tightly encloses the given context has a drawer.
If this is being used during a build (for example to decide whether to
show an "open drawer" button), set the registerForUpdates argument to
true. This will then set up an InheritedWidget relationship with the
TransparentScaffold so that the client widget gets rebuilt whenever the hasDrawer
value changes.
This method can be expensive (it walks the element tree).
See also:
- TransparentScaffold.of, which provides access to the TransparentScaffoldState object as a whole, from which you can show bottom sheets, and so forth.
Implementation
static bool hasDrawer(BuildContext context, {bool registerForUpdates = true}) {
if (registerForUpdates) {
final _ScaffoldScope? scaffold = context.dependOnInheritedWidgetOfExactType<_ScaffoldScope>();
return scaffold?.hasDrawer ?? false;
} else {
final TransparentScaffoldState? scaffold =
context.findAncestorStateOfType<TransparentScaffoldState>();
return scaffold?.hasDrawer ?? false;
}
}