services library

Classes

AndroidMotionEvent: A Dart version of Android's MotionEvent.
AndroidPointerCoords: Position information for an Android pointer.
AndroidPointerProperties: Properties of an Android pointer.
AndroidViewController: Controls an Android view that is composed using a GL texture.
AppKitViewController: Controller for a macOS platform view.
ApplicationSwitcherDescription: Specifies a description of the application that is pertinent to the embedder's application switcher (also known as "recent tasks") user interface.
AssetBundle: A collection of resources used by the application.
AssetManifest: Contains details about available assets and their variants. See Resolution-aware image assets to learn about asset variants and how to declare them.
AssetMetadata: Contains information about an asset.
AutofillClient: An object that represents an autofillable input field in the autofill workflow.
AutofillConfiguration: A collection of autofill related information that represents an AutofillClient.
AutofillHints: A collection of commonly used autofill hint strings on different platforms.
AutofillScope: An ordered group within which AutofillClients are logically connected.
BackgroundIsolateBinaryMessenger: A BinaryMessenger for use on background (non-root) isolates.
BasicMessageChannel<T>: A named channel for communicating with platform plugins using asynchronous message passing.
BinaryCodec: MessageCodec with unencoded binary messages represented using ByteData.
BinaryMessenger: A messenger which sends binary data across the Flutter platform barrier.
BrowserContextMenu: Controls the browser's context menu on the web platform.
ByteData: A fixed-length, random-access sequence of bytes that also provides random and unaligned access to the fixed-width integers and floating point numbers represented by those bytes.
CachingAssetBundle: An AssetBundle that permanently caches string and structured resources that have been fetched.
ChannelBuffers: The buffering and dispatch mechanism for messages sent by plugins on the engine side to their corresponding plugin code on the framework side.
CharacterBoundary: A TextBoundary subclass for retrieving the range of the grapheme the given position is in.
Clipboard: Utility methods for interacting with the system's clipboard.
ClipboardData: Data stored on the system clipboard.
Color: An immutable 32 bit color value in ARGB format.
DarwinPlatformViewController: Base class for iOS and macOS view controllers.
DefaultProcessTextService: The service used by default for the text processing feature.
DefaultSpellCheckService: The service used by default to fetch spell check results for text input.
DeferredComponent: Manages the installation and loading of deferred components.
DiagnosticPropertiesBuilder: Builder to accumulate properties and configuration used to assemble a DiagnosticsNode from a Diagnosticable object.
DocumentBoundary: A text boundary that uses the entire document as logical boundary.
EventChannel: A named channel for communicating with platform plugins using event streams.
ExpensiveAndroidViewController: Controls an Android view that is composed using the Android view hierarchy. This controller is created from the PlatformViewsService.initExpensiveAndroidView factory.
FilteringTextInputFormatter: A TextInputFormatter that prevents the insertion of characters matching (or not matching) a particular pattern, by replacing the characters with the given replacementString.
FontLoader: A class that enables the dynamic loading of fonts at runtime.
FontWeight: The thickness of the glyphs used to draw the text.
GLFWKeyHelper: Helper class that uses GLFW-specific key mappings.
GtkKeyHelper: Helper class that uses GTK-specific key mappings.
HapticFeedback: Allows access to the haptic feedback interface on the device.
HardwareKeyboard: Manages key events from hardware keyboards.
ImmutableBuffer: A handle to a read-only byte buffer that is managed by the engine.
JSONMessageCodec: MessageCodec with UTF-8 encoded JSON messages.
JSONMethodCodec: MethodCodec with UTF-8 encoded JSON method calls and result envelopes.
KeyboardInsertedContent: A class representing rich content (such as a PNG image) inserted via the system input method.
KeyboardKey: A base class for all keyboard key types.
KeyData: Information about a key event.
KeyDownEvent: An event indicating that the user has pressed a key down on the keyboard.
KeyEvent: Defines the interface for keyboard key events.
KeyEventManager: A singleton class that processes key messages from the platform and dispatches converted messages accordingly.
KeyHelper: Abstract class for window-specific key mappings.
KeyMessage: The assembled information converted from a native key message.
KeyRepeatEvent: An event indicating that the user has been holding a key on the keyboard and causing repeated events.
KeyUpEvent: An event indicating that the user has released a key on the keyboard.
LengthLimitingTextInputFormatter: A TextInputFormatter that prevents the insertion of more characters than allowed.
LineBoundary: A TextBoundary subclass for locating closest line breaks to a given position.
LiveText: Utility methods for interacting with the system's Live Text.
LogicalKeyboardKey: A class with static values that describe the keys that are returned from RawKeyEvent.logicalKey.
Matrix4: 4D Matrix. Values are stored in column major order.
MessageCodec<T>: A message encoding/decoding mechanism.
MethodCall: A command object representing the invocation of a named method.
MethodChannel: A named channel for communicating with platform plugins using asynchronous method calls.
MethodCodec: A codec for method calls and enveloped results.
MouseCursor: An interface for mouse cursor definitions.
MouseCursorManager: Maintains the state of mouse cursors and manages how cursors are searched for.
MouseCursorSession: Manages the duration that a pointing device should display a specific mouse cursor.
MouseTrackerAnnotation: The annotation object used to annotate regions that are interested in mouse movements.
NetworkAssetBundle: An AssetBundle that loads resources over the network.
Offset: An immutable 2D floating-point offset.
OptionalMethodChannel: A MethodChannel that ignores missing platform plugins.
ParagraphBoundary: A text boundary that uses paragraphs as logical boundaries.
PhysicalKeyboardKey: A class with static values that describe the keys that are returned from RawKeyEvent.physicalKey.
PlatformAssetBundle: An AssetBundle that loads resources using platform messages.
PlatformViewController: An interface for controlling a single platform view.
PlatformViewsRegistry: A registry responsible for generating unique identifier for platform views.
PlatformViewsService: Provides access to the platform views service.
PointerEnterEvent: The pointer has moved with respect to the device while the pointer is or is not in contact with the device, and it has entered a target object.
PointerEvent: Base class for touch, stylus, or mouse events.
PointerExitEvent: The pointer has moved with respect to the device while the pointer is or is not in contact with the device, and exited a target object.
PointerHoverEvent: The pointer has moved with respect to the device while the pointer is not in contact with the device.
PredictiveBackEvent: Object used to report back gesture progress in Android.
ProcessTextAction: A data structure describing text processing actions.
ProcessTextService: Determines how to interact with the text processing feature.
RawFloatingCursorPoint: The current state and position of the floating cursor.
RawKeyboard: An interface for listening to raw key events.
RawKeyDownEvent: The user has pressed a key on the keyboard.
RawKeyEvent: Defines the interface for raw key events.
RawKeyEventData: Base class for platform-specific key event data.
RawKeyEventDataAndroid: Platform-specific key event data for Android.
RawKeyEventDataFuchsia: Platform-specific key event data for Fuchsia.
RawKeyEventDataIos: Platform-specific key event data for iOS.
RawKeyEventDataLinux: Platform-specific key event data for Linux.
RawKeyEventDataMacOs: Platform-specific key event data for macOS.
RawKeyEventDataWeb: Platform-specific key event data for Web.
RawKeyEventDataWindows: Platform-specific key event data for Windows.
RawKeyUpEvent: The user has released a key on the keyboard.
ReadBuffer: Read-only buffer for reading sequentially from a ByteData instance.
Rect: An immutable, 2D, axis-aligned, floating-point rectangle whose coordinates are relative to a given origin.
RestorationBucket: A RestorationBucket holds pieces of the restoration data that a part of the application needs to restore its state.
RestorationManager: Manages the restoration data in the framework and synchronizes it with the engine.
RootIsolateToken: A token that represents a root isolate.
ScribbleClient: An interface to receive focus from the engine.
SelectionRect: Represents a selection rect for a character and it's position in the text.
Size: Holds a 2D floating-point size.
SpellCheckResults: A data structure grouping together the SuggestionSpans and related text of results returned by a spell checker.
SpellCheckService: Determines how spell check results are received for text input.
StandardMessageCodec: MessageCodec using the Flutter standard binary encoding.
StandardMethodCodec: MethodCodec using the Flutter standard binary encoding.
StringCodec: MessageCodec with UTF-8 encoded String messages.
SuggestionSpan: A data structure representing a range of misspelled text and the suggested replacements for this range.
SurfaceAndroidViewController: Controls an Android view that is composed using a GL texture. This controller is created from the PlatformViewsService.initSurfaceAndroidView factory, and is defined for backward compatibility.
SystemChannels: Platform channels used by the Flutter system.
SystemChrome: Controls specific aspects of the operating system's graphical interface and how it interacts with the application.
SystemContextMenuController: Allows access to the system context menu.
SystemMouseCursor: A mouse cursor that is natively supported on the platform that the application is running on.
SystemMouseCursors: A collection of system MouseCursors.
SystemNavigator: Controls specific aspects of the system navigation stack.
SystemSound: Provides access to the library of short system specific sounds for common tasks.
SystemUiOverlayStyle: Specifies a preference for the style of the system overlays.
TextBoundary: An interface for retrieving the logical text boundary (as opposed to the visual boundary) at a given code unit offset in a document.
TextEditingDelta: A structure representing a granular change that has occurred to the editing state as a result of text editing.
TextEditingDeltaDeletion: A structure representing the deletion of a single/or contiguous sequence of characters in an editing state.
TextEditingDeltaInsertion: A structure representing an insertion of a single/or contiguous sequence of characters at some offset of an editing state.
TextEditingDeltaNonTextUpdate: A structure representing changes to the selection and/or composing regions of an editing state and no changes to the text value.
TextEditingDeltaReplacement: A structure representing a replacement of a range of characters with a new sequence of text.
TextEditingValue: The current text, selection, and composing state for editing a run of text.
TextInput: An low-level interface to the system's text input control.
TextInputConfiguration: Controls the visual appearance of the text input control.
TextInputConnection: An interface for interacting with a text input control.
TextInputFormatter: A TextInputFormatter can be optionally injected into an EditableText to provide as-you-type validation and formatting of the text being edited.
TextInputType: The type of information for which to optimize the text input control.
TextLayoutMetrics: A read-only interface for accessing visual information about the implementing text.
TextPosition: A position in a string of text.
TextRange: A range of characters in a string of text.
TextSelection: A range of text that represents a selection.
TextureAndroidViewController: Controls an Android view that is rendered as a texture. This is typically used by AndroidView to display a View in the Android view hierarchy.
UiKitViewController: Controller for an iOS platform view.
Uint8List: A fixed-length list of 8-bit unsigned integers.
UndoManager: A low-level interface to the system's undo manager.
WriteBuffer: Write-only buffer for incrementally building a ByteData instance.

Enums

Brightness: Describes the contrast of a theme or color palette.
DeviceOrientation: Specifies a particular device orientation.
DiagnosticLevel: The various priority levels used to filter which diagnostics are shown and omitted.
FloatingCursorDragState: The state of a "floating cursor" drag on an iOS soft keyboard.
KeyboardLockMode: Represents a lock mode of a keyboard, such as KeyboardLockMode.capsLock.
KeyboardSide: An enum describing the side of the keyboard that a key is on, to allow discrimination between which key is pressed (e.g. the left or right SHIFT key).
KeyDataTransitMode: The mode in which information of key messages is delivered.
MaxLengthEnforcement: Mechanisms for enforcing maximum length limits.
ModifierKey: An enum describing the type of modifier key that is being pressed.
SelectionChangedCause: Indicates what triggered the change in selected text (including changes to the cursor location).
ServicesServiceExtensions: Service extension constants for the services library.
SmartDashesType: Indicates how to handle the intelligent replacement of dashes in text input.
SmartQuotesType: Indicates how to handle the intelligent replacement of quotes in text input.
SwipeEdge: Enum representing the edge from which a swipe starts in a back gesture.
SystemSoundType: A sound provided by the system.
SystemUiMode: Describes different display configurations for both Android and iOS.
SystemUiOverlay: Specifies a system overlay at a particular location.
TargetPlatform: The platform that user interaction should adapt to target.
TextAffinity: A way to disambiguate a TextPosition when its offset could match two different locations in the rendered string.
TextAlign: Whether and how to align text horizontally.
TextCapitalization: Configures how the platform keyboard will select an uppercase or lowercase keyboard.
TextDirection: A direction in which text flows.
TextInputAction: An action the user has requested the text input control to perform.
UndoDirection: The direction in which an undo action should be performed, whether undo or redo.

Mixins

AutofillScopeMixin: A partial implementation of AutofillScope.
DeltaTextInputClient: An interface to receive granular information from TextInput.
ServicesBinding: Listens for platform messages and directs them to the defaultBinaryMessenger.
SystemContextMenuClient: An interface to receive calls related to the system context menu from the engine.
TextInputClient: An interface to receive information from TextInput.
TextInputControl: An interface for implementing text input controls that receive text editing state changes and visual input control requests.
TextSelectionDelegate: A mixin for manipulating the selection, provided for toolbar or shortcut keys.
UndoManagerClient: An interface to receive events from a native UndoManager.

Constants

appFlavor → const String?: The flavor this app was built with.
kAndroidNumPadMap → const Map<int, LogicalKeyboardKey>: A map of Android key codes which have printable representations, but appear on the number pad. Used to provide different key objects for keys like KEY_EQUALS and NUMPAD_EQUALS.
kAndroidToLogicalKey → const Map<int, LogicalKeyboardKey>: Maps Android-specific key codes to the matching LogicalKeyboardKey.
kAndroidToPhysicalKey → const Map<int, PhysicalKeyboardKey>: Maps Android-specific scan codes to the matching PhysicalKeyboardKey.
kFuchsiaToLogicalKey → const Map<int, LogicalKeyboardKey>: Maps Fuchsia-specific IDs to the matching LogicalKeyboardKey.
kFuchsiaToPhysicalKey → const Map<int, PhysicalKeyboardKey>: Maps Fuchsia-specific USB HID Usage IDs to the matching PhysicalKeyboardKey.
kGlfwNumpadMap → const Map<int, LogicalKeyboardKey>: A map of GLFW key codes which have printable representations, but appear on the number pad. Used to provide different key objects for keys like KEY_EQUALS and NUMPAD_EQUALS.
kGlfwToLogicalKey → const Map<int, LogicalKeyboardKey>: Maps GLFW-specific key codes to the matching LogicalKeyboardKey.
kGtkNumpadMap → const Map<int, LogicalKeyboardKey>: A map of GTK key codes which have printable representations, but appear on the number pad. Used to provide different key objects for keys like KEY_EQUALS and NUMPAD_EQUALS.
kGtkToLogicalKey → const Map<int, LogicalKeyboardKey>: Maps GTK-specific key codes to the matching LogicalKeyboardKey.
kIosNumPadMap → const Map<int, LogicalKeyboardKey>: A map of iOS key codes which have printable representations, but appear on the number pad. Used to provide different key objects for keys like KEY_EQUALS and NUMPAD_EQUALS.
kIosSpecialLogicalMap → const Map<String, LogicalKeyboardKey>: Maps iOS specific string values of nonvisible keys to logical keys
kIosToLogicalKey → const Map<int, LogicalKeyboardKey>: A map of iOS key codes presenting LogicalKeyboardKey.
kIosToPhysicalKey → const Map<int, PhysicalKeyboardKey>: Maps iOS-specific key code values representing PhysicalKeyboardKey.
kLinuxToPhysicalKey → const Map<int, PhysicalKeyboardKey>: Maps XKB specific key code values representing PhysicalKeyboardKey.
kMacOsFunctionKeyMap → const Map<int, LogicalKeyboardKey>: A map of macOS key codes which are numbered function keys, so that they can be excluded when asking "is the Fn modifier down?".
kMacOsNumPadMap → const Map<int, LogicalKeyboardKey>: A map of macOS key codes which have printable representations, but appear on the number pad. Used to provide different key objects for keys like KEY_EQUALS and NUMPAD_EQUALS.
kMacOsToLogicalKey → const Map<int, LogicalKeyboardKey>: A map of macOS key codes presenting LogicalKeyboardKey.
kMacOsToPhysicalKey → const Map<int, PhysicalKeyboardKey>: Maps macOS-specific key code values representing PhysicalKeyboardKey.
kProfilePlatformChannels → const bool: Controls whether platform channel usage can be debugged in release mode.
kWebLocationMap → const Map<String, List<LogicalKeyboardKey?>>: A map of Web KeyboardEvent keys which needs to be decided based on location, typically for numpad keys and modifier keys. Used to provide different key objects for keys like KEY_EQUALS and NUMPAD_EQUALS.
kWebNumPadMap → const Map<String, LogicalKeyboardKey>: A map of Web KeyboardEvent codes which have printable representations, but appear on the number pad. Used to provide different key objects for keys like KEY_EQUALS and NUMPAD_EQUALS.
kWebToLogicalKey → const Map<String, LogicalKeyboardKey>: Maps Web KeyboardEvent codes to the matching LogicalKeyboardKey.
kWebToPhysicalKey → const Map<String, PhysicalKeyboardKey>: Maps Web KeyboardEvent codes to the matching PhysicalKeyboardKey.
kWindowsNumPadMap → const Map<int, LogicalKeyboardKey>: A map of Windows KeyboardEvent codes which have printable representations, but appear on the number pad. Used to provide different key objects for keys like KEY_EQUALS and NUMPAD_EQUALS.
kWindowsToLogicalKey → const Map<int, LogicalKeyboardKey>: Maps Windows KeyboardEvent codes to the matching LogicalKeyboardKey.
kWindowsToPhysicalKey → const Map<int, PhysicalKeyboardKey>: Maps Windows KeyboardEvent codes to the matching PhysicalKeyboardKey.

Properties

debugKeyEventSimulatorTransitModeOverride ↔ KeyDataTransitMode?: Override the transit mode with which key events are simulated.
getter/setter pair
debugPrintKeyboardEvents ↔ bool: Setting to true will cause extensive logging to occur when key events are received.
getter/setter pair
debugProfilePlatformChannels ↔ bool: Controls whether platform channel usage can be debugged in non-release mode.
getter/setter pair
platformViewsRegistry → PlatformViewsRegistry: The PlatformViewsRegistry responsible for generating unique identifiers for platform views.
final
rootBundle → AssetBundle: The AssetBundle from which this application was loaded.
final
shouldProfilePlatformChannels → bool: Profile and print statistics on Platform Channel usage.
no setter

Functions

debugAssertAllServicesVarsUnset(String reason) → bool: Returns true if none of the widget library debug variables have been changed.
debugIsSerializableForRestoration(Object? object) → bool: Returns true when the provided object is serializable for state restoration.
runeToLowerCase(int rune) → int: Convert a UTF32 rune to its lower case.

Typedefs

KeyEventCallback = bool Function(KeyEvent event): The signature for HardwareKeyboard.addHandler, a callback to decide whether the entire framework handles a key event.
KeyMessageHandler = bool Function(KeyMessage message): The signature for KeyEventManager.keyMessageHandler.
MessageHandler = Future<ByteData?>? Function(ByteData? message): A function which takes a platform message and asynchronously returns an encoded response.
PlatformMessageResponseCallback = void Function(ByteData? data): Signature for responses to platform messages.
PlatformViewCreatedCallback = void Function(int id): Callback signature for when a platform view was created.
PointerEnterEventListener = void Function(PointerEnterEvent event): Signature for listening to PointerEnterEvent events.
PointerExitEventListener = void Function(PointerExitEvent event): Signature for listening to PointerExitEvent events.
PointerHoverEventListener = void Function(PointerHoverEvent event): Signature for listening to PointerHoverEvent events.
PointTransformer = Offset Function(Offset position): Converts a given point from the global coordinate system in logical pixels to the local coordinate system for a box.
RawKeyEventHandler = bool Function(RawKeyEvent event): A callback type used by RawKeyboard.keyEventHandler to send key events to a handler that can determine if the key has been handled or not.
SystemUiChangeCallback = Future<void> Function(bool systemOverlaysAreVisible): Signature for listening to changes in the SystemUiMode.
TextInputFormatFunction = TextEditingValue Function(TextEditingValue oldValue, TextEditingValue newValue): Function signature expected for creating custom TextInputFormatter shorthands via TextInputFormatter.withFunction.
UntilPredicate = bool Function(int offset, bool forward): Signature for a predicate that takes an offset into a UTF-16 string, and a boolean that indicates the search direction.
ValueChanged<T> = void Function(T value): Signature for callbacks that report that an underlying value has changed.
VoidCallback = void Function(): Signature of callbacks that have no arguments and return no data.

Exceptions / Errors

MissingPluginException: Thrown to indicate that a platform interaction failed to find a handling plugin.
PlatformException: Thrown to indicate that a platform interaction failed in the platform plugin.

Classes

Enums

Mixins

Constants

Properties

Functions

Typedefs

Exceptions / Errors

Flutter package

services library