MediaQuery class Null safety

Establishes a subtree in which media queries resolve to the given data.

For example, to learn the size of the current media (e.g., the window containing your app), you can read the MediaQueryData.size property from the MediaQueryData returned by MediaQuery.of: MediaQuery.of(context).size.

Querying the current media using MediaQuery.of will cause your widget to rebuild automatically whenever the MediaQueryData changes (e.g., if the user rotates their device).

If no MediaQuery is in scope then the MediaQuery.of method will throw an exception. Alternatively, MediaQuery.maybeOf may be used, which returns null instead of throwing if no MediaQuery is in scope.

Constructors

MediaQuery({Key? key, required MediaQueryData data, required Widget child}): Creates a widget that provides MediaQueryData to its descendants.
const
MediaQuery.removePadding({Key? key, required BuildContext context, bool removeLeft = false, bool removeTop = false, bool removeRight = false, bool removeBottom = false, required Widget child}): Creates a new MediaQuery that inherits from the ambient MediaQuery from the given context, but removes the specified padding.
factory
MediaQuery.removeViewInsets({Key? key, required BuildContext context, bool removeLeft = false, bool removeTop = false, bool removeRight = false, bool removeBottom = false, required Widget child}): Creates a new MediaQuery that inherits from the ambient MediaQuery from the given context, but removes the specified view insets.
factory
MediaQuery.removeViewPadding({Key? key, required BuildContext context, bool removeLeft = false, bool removeTop = false, bool removeRight = false, bool removeBottom = false, required Widget child}): Creates a new MediaQuery that inherits from the ambient MediaQuery from the given context, but removes the specified view padding.
factory

Properties

child → Widget: The widget below this widget in the tree.
finalinherited
data → MediaQueryData: Contains information about the current media.
final
hashCode → int: The hash code for this object.
nonVirtual">@nonVirtualread-onlyinherited
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type: A representation of the runtime type of the object.
read-onlyinherited

Methods

createElement() → InheritedElement: Inflates this configuration to a concrete instance.
inherited
debugDescribeChildren() → List<DiagnosticsNode>: Returns a list of DiagnosticsNode objects describing this node's children.
protected">@protectedinherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void: Add additional properties associated with the node.
override
noSuchMethod(Invocation invocation) → dynamic: Invoked when a non-existent 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}) → 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
updateShouldNotify(covariant MediaQuery oldWidget) → bool: Whether the framework should notify widgets that inherit from this widget.
override

Operators

operator ==(Object other) → bool: The equality operator.
nonVirtual">@nonVirtualinherited

Static Methods

boldTextOverride(BuildContext context) → bool: Returns the boldText accessibility setting for the nearest MediaQuery ancestor, or false if no such ancestor exists.
fromWindow({Key? key, required Widget child}) → Widget: Provides a MediaQuery which is built and updated using the latest WidgetsBinding.window values.
highContrastOf(BuildContext context) → bool: Returns highContrast for the nearest MediaQuery ancestor or false, if no such ancestor exists.
maybeOf(BuildContext context) → MediaQueryData?: The data from the closest instance of this class that encloses the given context, if any.
of(BuildContext context) → MediaQueryData: The data from the closest instance of this class that encloses the given context.
platformBrightnessOf(BuildContext context) → Brightness: Returns platformBrightness for the nearest MediaQuery ancestor or Brightness.light, if no such ancestor exists.
textScaleFactorOf(BuildContext context) → double: Returns textScaleFactor for the nearest MediaQuery ancestor or 1.0, if no such ancestor exists.

Flutter
widgets
MediaQuery class