WidgetModifier<Content extends Widget, Body extends Widget> class abstract

A modifier that you apply to a widget or another widget modifier, producing a different version of the original value. Adopt the WidgetModifier protocol when you want to create a reusable modifier that you can apply to any widget. The example below combines several modifiers to create a new modifier that you can use to add background:

class BackgroundModifier implements WidgetModifier<Widget, DecoratedBox> { BackgroundModifier(this.color);

Color color;

@override DecoratedBox body(Widget content) { return DecoratedBox( decoration: BoxDecoration( color: color, ), child: content, ); } }

You can apply modifier(:) directly to a widget, but a more common and idiomatic approach uses modifier(:) to define an extension to widget itself that incorporates the widget modifier:

extension BackgroundExt on Widget { DecoratedBox background(Color color) { return modifier(BackgroundModifier(color)); } }

Implementers

• AlignModifier
• CardModifier
• CenterModifier
• ClipRectModifier
• ContainerModifier
• DecoratedBoxModifier
• ExpandedModifier
• GestureDetectorModifier
• IconButtonModifier
• InkWellModifier
• MaterialModifier
• PaddingModifier
• StackModifier
• TooltipModifier

Constructors

WidgetModifier()

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

body(Content content) → Body

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited