Breakpoint class

Represents an inclusive size range used for responsive styling.

Use matchesContext to evaluate the viewport size from MediaQuery, or matches to evaluate any Size, including one derived from local layout constraints.

Example usage:

const Breakpoint mobile = .maxWidth(767);
const Breakpoint tablet = .widthRange(768, 1023);
const Breakpoint desktop = .minWidth(1024);

Annotations

• @immutable

Constructors

Breakpoint({double? minWidth, double? maxWidth, double? minHeight, double? maxHeight})

Creates a new breakpoint with the specified constraints.

const

Breakpoint.heightRange(double minHeight, double maxHeight)

Creates a breakpoint that matches heights from minHeight to maxHeight.

const

Breakpoint.maxHeight(double maxHeight)

Creates a breakpoint that matches heights less than or equal to maxHeight.

const

Breakpoint.maxWidth(double maxWidth)

Creates a breakpoint that matches widths less than or equal to maxWidth.

const

Breakpoint.minHeight(double minHeight)

Creates a breakpoint that matches heights greater than or equal to minHeight.

const

Breakpoint.minWidth(double minWidth)

Creates a breakpoint that matches widths greater than or equal to minWidth.

const

Breakpoint.widthRange(double minWidth, double maxWidth)

Creates a breakpoint that matches widths from minWidth to maxWidth.

const

Properties

hashCode → int

The hash code for this object.

no setter, override

maxHeight → double?

The maximum height for this breakpoint (inclusive). If null, there is no maximum height constraint.

final

maxWidth → double?

The maximum width for this breakpoint (inclusive). If null, there is no maximum width constraint.

final

minHeight → double?

The minimum height for this breakpoint (inclusive). If null, there is no minimum height constraint.

final

minWidth → double?

The minimum width for this breakpoint (inclusive). If null, there is no minimum width constraint.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

matches(Size size) → bool

Checks if the given size matches this breakpoint's constraints.

matchesContext(BuildContext context) → bool

Checks whether this breakpoint matches the viewport size from context.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

Returns a string representation of this breakpoint for debugging.

override

Operators

operator ==(Object other) → bool

The equality operator.

override

Constants

desktop → const Breakpoint

mobile → const Breakpoint

tablet → const Breakpoint