preferredHeightFor method Null safety
- BuildContext context,
- Size preferredSize
Used by Scaffold to compute its AppBar's overall height. The returned value is
the same preferredSize.height unless AppBar.toolbarHeight was null and
AppBarTheme.of(context).toolbarHeight is non-null. In that case the
return value is the sum of the theme's toolbar height and the height of
the app bar's AppBar.bottom widget.
Implementation
static double preferredHeightFor(BuildContext context, Size preferredSize) {
if (preferredSize is _PreferredAppBarSize && preferredSize.toolbarHeight == null) {
return (AppBarTheme.of(context).toolbarHeight ?? kToolbarHeight) + (preferredSize.bottomHeight ?? 0);
}
return preferredSize.height;
}