NewGradientAppBar constructor
NewGradientAppBar({
- Key? key,
- Widget? leading,
- bool automaticallyImplyLeading = true,
- Widget? title,
- List<
Widget> ? actions, - Widget? flexibleSpace,
- PreferredSizeWidget? bottom,
- double? elevation,
- ShapeBorder? shape,
- Gradient? gradient,
- Brightness? brightness,
- IconThemeData? iconTheme,
- IconThemeData? actionsIconTheme,
- TextTheme? textTheme,
- bool primary = true,
- bool? centerTitle,
- double titleSpacing = NavigationToolbar.kMiddleSpacing,
- double toolbarOpacity = 1.0,
- double bottomOpacity = 1.0,
Creates a material design app bar.
The arguments primary, toolbarOpacity, bottomOpacity and automaticallyImplyLeading must not be null. Additionally, if elevation is specified, it must be non-negative.
If elevation, brightness, iconTheme,
actionsIconTheme, or textTheme are null, then their GradientAppBarTheme
values will be used. If the corresponding GradientAppBarTheme
property is null,
then the default specified in the property's documentation will be used.
Typically used in the Scaffold.appBar property.
Implementation
NewGradientAppBar({
Key? key,
this.leading,
this.automaticallyImplyLeading = true,
this.title,
this.actions,
this.flexibleSpace,
this.bottom,
this.elevation,
this.shape,
this.gradient,
this.brightness,
this.iconTheme,
this.actionsIconTheme,
this.textTheme,
this.primary = true,
this.centerTitle,
this.titleSpacing = NavigationToolbar.kMiddleSpacing,
this.toolbarOpacity = 1.0,
this.bottomOpacity = 1.0,
}) : assert(elevation == null || elevation >= 0.0),
preferredSize = Size.fromHeight(
kToolbarHeight + (bottom?.preferredSize.height ?? 0.0)),
super(key: key);