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.

See also:



MediaQuery({Key key, @required MediaQueryData data, @required Widget child })
Creates a widget that provides MediaQueryData to its descendants. [...]
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. [...]


data MediaQueryData
Contains information about the current media. [...]
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


debugFillProperties(DiagnosticPropertiesBuilder description) → void
updateShouldNotify(MediaQuery old) bool
Whether the framework should notify widgets that inherit from this widget. [...]
createElement() InheritedElement
Inflates this configuration to a concrete instance. [...]
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. [...]
toDiagnosticsNode({String name, DiagnosticsTreeStyle style }) DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by toStringDeep. [...]
toString({DiagnosticLevel minLevel: DiagnosticLevel.debug }) String
Returns a string representation of this object.
toStringDeep({String prefixLineOne: '', String prefixOtherLines, DiagnosticLevel minLevel: DiagnosticLevel.debug }) String
Returns a string representation of this node and its descendants. [...]
toStringShallow({String joiner: ', ', DiagnosticLevel minLevel: DiagnosticLevel.debug }) String
Returns a one-line detailed description of the object. [...]
toStringShort() String
A short, textual description of this widget.


operator ==(other) bool
The equality operator. [...]

Static Methods

of(BuildContext context, { bool nullOk: false }) MediaQueryData
The data from the closest instance of this class that encloses the given context. [...]