ScreenLayout class

A widget that will layout child at the given size in breakpoints. ScreenLayoutBreakpoints.portraitStandardBreakpoint while in portrait mode, or ScreenLayoutBreakpoints.landscapeStandardBreakpoint while in landscape mode. After laying out at that size, ScreenLayout will scale the child so as to fix the current screen size, up to a maximum scale ratio of maxScale, or ScreenLayoutBreakpoints.portraitConstrainedWidth while in portrait mode, or ScreenLayoutBreakpoints.landscapeConstrainedWidth while in landscape mode.

This is useful for when you have a design where the base design is created with a given width, and all UI elements are meant to be shown exactly as the design shows relative to the current device's screen size. In other words, this widget will implement a non-responsive UI that automatically scales children up or down to match the current screen size. It is usually a bad design practice to scale up to fullscreen on devices like a tablet or PC, and you can control the maximum things will scale by using the above-mentioned settings to avoid that and show a more reasonable UI design.

example:

ScreenLayout(
  breakpoints: const ScreenLayoutBreakpoints(
    portraitStandardBreakpoint: 375.0,
    portraitConstrainedWidth: double.infinity,
    landscapeStandardBreakpoint: 375.0,
    landscapeConstrainedWidth: double.infinity,
    maxScale: 1.2,
  ),
  child: HogehogeWidget(),
),

Inheritance

• Object
• DiagnosticableTree
• Widget
• RenderObjectWidget
• SingleChildRenderObjectWidget
• ScreenLayout

Constructors

ScreenLayout.new({Key? key, Widget? child, ScreenLayoutBreakpoints? breakpoints, String? name})

Creates a ScreenLayout with the name name that adjusts the size of the widget specified in child based on the configuration in breakpoints.

const

ScreenLayout.named({Key? key, Widget? child, required String name})

Creates a ScreenLayout with the name name that adjusts the size of the widget specified in child.

factory

Properties

breakpoints → ScreenLayoutBreakpoints?

Breakpoints for adjusting the size of the widget.

final

child → Widget?

The widget below this widget in the tree.

final, inherited

hashCode → int

The hash code for this object.

no setter, inherited

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

name → String?

Name of the ScreenLayout widget.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

createElement() → SingleChildRenderObjectElement

RenderObjectWidgets always inflate to a RenderObjectElement subclass.

inherited

createRenderObject(BuildContext context) → RenderObject

Creates an instance of the RenderObject class that this RenderObjectWidget represents, using the configuration described by this RenderObjectWidget.

override

debugDescribeChildren() → List<DiagnosticsNode>

Returns a list of DiagnosticsNode objects describing this node's children.

inherited

debugFillProperties(DiagnosticPropertiesBuilder properties) → void

Add additional properties associated with the node.

inherited

didUnmountRenderObject(covariant RenderObject renderObject) → void

This method is called when a RenderObject that was previously associated with this widget is removed from the render tree. The provided RenderObject will be of the same type as the one created by this widget's createRenderObject method.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode

Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.

inherited

toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String

A string representation of this object.

inherited

toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String

Returns a string representation of this node and its descendants.

inherited

toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String

Returns a one-line detailed description of the object.

inherited

toStringShort() → String

A short, textual description of this widget.

inherited

updateRenderObject(BuildContext context, covariant _ScreenLayoutRenderObject renderObject) → void

Copies the configuration described by this RenderObjectWidget to the given RenderObject, which will be of the same type as returned by this object's createRenderObject.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited