MediaQuery class

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, unless the nullOk argument is set to true, in which case it returns null.

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 paddings. [...]
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

Properties

data → MediaQueryData: Contains information about the current media. [...]
final
child → Widget: The widget below this widget in the tree. [...]
final, inherited
hashCode → int: The hash code for this object. [...]
read-only, inherited
key → Key: Controls how one widget replaces another widget in the tree. [...]
final, inherited
runtimeType → Type: A representation of the runtime type of the object.
read-only, inherited

Methods

debugFillProperties(DiagnosticPropertiesBuilder properties) → void: Add additional properties associated with the node. [...]
override
updateShouldNotify(covariant MediaQuery oldWidget) → bool: Whether the framework should notify widgets that inherit from this widget. [...]
override
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, inherited
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 toStringDeep. [...]
inherited
toString({DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String: Returns 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

Operators

operator ==(dynamic other) → bool: The equality operator. [...]
inherited

Static Methods

boldTextOverride(BuildContext context) → bool: Returns the boldText accessibility setting for the nearest MediaQuery ancestor, or false if no such ancestor exists.
of(BuildContext context, { bool nullOk: false }) → MediaQueryData: The data from the closest instance of this class that encloses the given context. [...]
textScaleFactorOf(BuildContext context) → double: Returns textScaleFactor for the nearest MediaQuery ancestor or 1.0, if no such ancestor exists.