ResponsiveProvider class

The ResponsiveProvider class is a provider that listens for changes in device metrics and screen dimensions. It allows adapting the UI based on the current screen size and device type, using breakpoints.

Inheritance
Implemented types

Constructors

ResponsiveProvider()
Constructor that initializes the provider and adds this instance as an observer to monitor changes in the device metrics.

Properties

breakpoint ↔ Breakpoint
getter/setter pair
devicePixelRatio ↔ double
getter/setter pair
hashCode → int
The hash code for this object.
no setterinherited
hasListeners → bool
Whether any listeners are currently registered.
no setterinherited
height → double
Gets the current screen height.
no setter
physicalHeight ↔ double
getter/setter pair
physicalWidth ↔ double
getter/setter pair
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
screenHeight ↔ double
getter/setter pair
screenWidth ↔ double
getter/setter pair
width → double
Gets the current screen width.
no setter

Methods

addListener(VoidCallback listener) → void
Register a closure to be called when the object changes.
inherited
didChangeAccessibilityFeatures() → void
Called when the system changes the set of currently active accessibility features.
override
didChangeAppLifecycleState(AppLifecycleState state) → void
Called when the system puts the app in the background or returns the app to the foreground.
override
didChangeLocales(List<Locale>? locales) → void
Called when the system tells the app that the user's locale has changed. For example, if the user changes the system language settings.
override
didChangeMetrics() → void
Called when the application's dimensions change. For example, when a phone is rotated.
override
didChangePlatformBrightness() → void
Called when the platform brightness changes.
override
didChangeTextScaleFactor() → void
Called when the platform's text scale factor changes.
override
didChangeViewFocus(ViewFocusEvent event) → void
Called whenever the PlatformDispatcher receives a notification that the focus state on a view has changed.
override
didHaveMemoryPressure() → void
Called when the system is running low on memory.
override
didPopRoute() → Future<bool>
Called when the system tells the app to pop the current route, such as after a system back button press or back gesture.
override
didPushRoute(String route) → Future<bool>
Called when the host tells the application to push a new route onto the navigator.
override
didPushRouteInformation(RouteInformation routeInformation) → Future<bool>
Called when the host tells the application to push a new RouteInformation and a restoration state onto the router.
override
didRequestAppExit() → Future<AppExitResponse>
Called when a request is received from the system to exit the application.
override
dispose() → void
Discards any resources used by the object. After this is called, the object is not in a usable state and should be discarded (calls to addListener will throw after the object is disposed).
override
handleCancelBackGesture() → void
Called when a predictive back gesture is canceled, indicating that no navigation should occur.
override
handleCommitBackGesture() → void
Called when a predictive back gesture is finished successfully, indicating that the current route should be popped.
override
handleStartBackGesture(PredictiveBackEvent backEvent) → bool
Called at the start of a predictive back gesture.
override
handleStatusBarTap() → void
Called when the user taps the status bar on iOS, to scroll a scroll view to the top.
inherited
handleUpdateBackGestureProgress(PredictiveBackEvent backEvent) → void
Called when a predictive back gesture moves.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
notifyListeners() → void
Call all the registered listeners.
inherited
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that are notified when the object changes.
inherited
showWhen(Breakpoint md, Widget widget) → Widget
Conditionally shows a widget based on the current breakpoint.
toString() → String
A string representation of this object.
inherited
update() → void
Updates the screen size and breakpoint based on the current device's metrics (physical size and pixel ratio). It calculates the screen width and height in logical pixels and determines the appropriate breakpoint.
value<T>({required List<Breakpoint> when, required T value, required T ifnot}) → T
Returns a value based on the current device type.
valueWhen<T>(T value, Breakpoint md, T newValue) → T
Returns a new value based on the current breakpoint. The new value will be returned if the breakpoint is greater than or equal to the specified md breakpoint.
when<T>(T? phone, T? tablet, T? computer) → T
Returns a value based on the current device type.

Operators

operator ==(Object other) → bool
The equality operator.
inherited