dart_ui_real
library
Classes
AccessibilityFeatures
Additional accessibility features that may be enabled by the platform.
BackdropFilterEngineLayer
An opaque handle to a backdrop filter engine layer.
CallbackHandle
A wrapper for a raw callback handle.
Canvas
An interface for recording graphical operations.
ChannelBuffers
The buffering and dispatch mechanism for messages sent by plugins
on the engine side to their corresponding plugin code on the
framework side.
ClipPathEngineLayer
An opaque handle to a clip path engine layer.
ClipRectEngineLayer
An opaque handle to a clip rect engine layer.
ClipRRectEngineLayer
An opaque handle to a clip rounded rect engine layer.
Codec
A handle to an image codec.
Color
An immutable 32 bit color value in ARGB format.
ColorFilter
A description of a color filter to apply when drawing a shape or compositing
a layer with a particular Paint . A color filter is a function that takes
two colors, and outputs one color. When applied during compositing, it is
independently applied to each pixel of the layer being drawn before the
entire layer is merged with the destination.
ColorFilterEngineLayer
An opaque handle to a color filter engine layer.
DartPluginRegistrant
Helper functions for Dart Plugin Registrants.
Display
A configurable display that a FlutterView renders on.
DisplayFeature
Area of the display that may be obstructed by a hardware feature.
EngineLayer
A handle for the framework to hold and retain an engine layer across frames.
FlutterView
A view into which a Flutter Scene is drawn.
FontFeature
A feature tag and value that affect the selection of glyphs in a font.
FontVariation
An axis tag and value that can be used to customize variable fonts.
FontWeight
The thickness of the glyphs used to draw the text.
FragmentProgram
An instance of FragmentProgram creates Shader objects (as used by
Paint.shader ).
FragmentShader
A Shader generated from a FragmentProgram .
FrameData
Additional data available on each flutter frame.
FrameInfo
Information for a single frame of an animation.
FrameTiming
Time-related performance metrics of a frame.
GestureSettings
Platform specific configuration for gesture behavior, such as touch slop.
GlyphInfo
The measurements of a character (or a sequence of visually connected
characters) within a paragraph.
Gradient
A shader (as used by Paint.shader ) that renders a color gradient.
Image
Opaque handle to raw decoded image data (pixels).
ImageDescriptor
A descriptor of data that can be turned into an Image via a Codec .
ImageFilter
A filter operation to apply to a raster image.
ImageFilterEngineLayer
An opaque handle to an image filter engine layer.
ImageShader
A shader (as used by Paint.shader ) that tiles an image.
ImmutableBuffer
A handle to a read-only byte buffer that is managed by the engine.
IsolateNameServer
Static methods to allow for simple sharing of SendPort s across Isolate s.
KeyData
Information about a key event.
LineMetrics
LineMetrics stores the measurements and statistics of a single line in the
paragraph.
Locale
An identifier used to select a user's language and formatting preferences.
LocaleStringAttribute
A string attribute that causes the assistive technologies, e.g. VoiceOver,
to treat string as a certain language.
MaskFilter
A mask filter to apply to shapes as they are painted. A mask filter is a
function that takes a bitmap of color pixels, and returns another bitmap of
color pixels.
Offset
An immutable 2D floating-point offset.
OffsetBase
Base class for Size and Offset , which are both ways to describe
a distance as a two-dimensional axis-aligned vector.
OffsetEngineLayer
An opaque handle to an offset engine layer.
OpacityEngineLayer
An opaque handle to an opacity engine layer.
Paint
A description of the style to use when drawing on a Canvas .
Paragraph
A paragraph of text.
ParagraphBuilder
Builds a Paragraph containing text with the given styling information.
ParagraphConstraints
Layout constraints for Paragraph objects.
ParagraphStyle
An opaque object that determines the configuration used by
ParagraphBuilder to position lines within a Paragraph of text.
Path
A complex, one-dimensional subset of a plane.
PathMetric
Utilities for measuring a Path and extracting sub-paths.
PathMetricIterator
Used by PathMetrics to track iteration from one segment of a path to the
next for measurement.
PathMetrics
An iterable collection of PathMetric objects describing a Path .
Picture
An object representing a sequence of recorded graphical operations.
PictureRecorder
Records a Picture containing a sequence of graphical operations.
PlatformDispatcher
Platform event dispatcher singleton.
PluginUtilities
Functionality for Flutter plugin authors.
PointerData
Information about the state of a pointer.
PointerDataPacket
A sequence of reports about the state of pointers.
Radius
A radius for either circular or elliptical shapes.
Rect
An immutable, 2D, axis-aligned, floating-point rectangle whose coordinates
are relative to a given origin.
RootIsolateToken
A token that represents a root isolate.
RRect
An immutable rounded rectangle with the custom radii for all four corners.
RSTransform
A transform consisting of a translation, a rotation, and a uniform scale.
Scene
An opaque object representing a composited scene.
SceneBuilder
Builds a Scene containing the given visuals.
SemanticsAction
The possible actions that can be conveyed from the operating system
accessibility APIs to a semantics node.
SemanticsActionEvent
An event to request a SemanticsAction of type to be performed on the
SemanticsNode identified by nodeId owned by the FlutterView identified
by viewId .
SemanticsFlag
A Boolean value that can be associated with a semantics node.
SemanticsUpdate
An opaque object representing a batch of semantics updates.
SemanticsUpdateBuilder
An object that creates SemanticsUpdate objects.
Shader
Base class for objects such as Gradient and ImageShader which
correspond to shaders as used by Paint.shader .
ShaderMaskEngineLayer
An opaque handle to a shader mask engine layer.
Shadow
A single shadow.
SingletonFlutterWindow
Deprecated. Will be removed in a future version of Flutter.
Size
Holds a 2D floating-point size.
SpellOutStringAttribute
A string attribute that causes the assistive technologies, e.g. VoiceOver,
to spell out the string character by character.
StringAttribute
An abstract interface for string attributes that affects how assistive
technologies, e.g. VoiceOver or TalkBack, treat the text.
StrutStyle
See also:
Tangent
The geometric description of a tangent: the angle at a point.
TargetImageSize
A specification of the size to which an image should be decoded.
TextBox
A rectangle enclosing a run of text.
TextDecoration
A linear decoration to draw near the text.
TextHeightBehavior
Defines how to apply TextStyle.height over and under text.
TextPosition
A position in a string of text.
A range of characters in a string of text.
TextStyle
An opaque object that determines the size, position, and rendering of text.
TransformEngineLayer
An opaque handle to a transform engine layer.
Vertices
A set of vertex data used by Canvas.drawVertices .
ViewConstraints
Immutable layout constraints for FlutterView s.
ViewFocusEvent
An event for the engine to communicate view focus changes to the app.
ViewPadding
A representation of distances for each of the four edges of a rectangle,
used to encode the view insets and padding that applications should place
around their user interface, as exposed by FlutterView.viewInsets and
FlutterView.padding . View insets and padding are preferably read via
MediaQuery.of .
Constants
keepToString → const pragma
Annotation to keep Object.toString overrides as-is instead of removing
them for size optimization purposes.
kTextHeightNone → const double
A TextStyle.height value that indicates the text span should take
the height defined by the font, which may not be exactly the height of
TextStyle.fontSize.
Functions
clampDouble (double x , double min , double max → double
Same as num.clamp but optimized for a non-null double .
decodeImageFromList (Uint8List list , ImageDecoderCallback callback → void
Loads a single image frame from a byte array into an Image object.
decodeImageFromPixels (Uint8List pixels , int width , int height , PixelFormat format , ImageDecoderCallback callback , {int ?rowBytes , int ?targetWidth , int ?targetHeight , bool allowUpscaling = true → void
Convert an array of pixel values into an Image object.
instantiateImageCodec (Uint8List list , {int ?targetWidth , int ?targetHeight , bool allowUpscaling = true → Future <Codec
Instantiates an image Codec .
instantiateImageCodecFromBuffer (ImmutableBuffer buffer , {int ?targetWidth , int ?targetHeight , bool allowUpscaling = true → Future <Codec
Instantiates an image Codec .
instantiateImageCodecWithSize (ImmutableBuffer buffer , {TargetImageSizeCallback ?getTargetSize → Future <Codec
Instantiates an image Codec .
lerpDouble (num ?a , num ?b , double t → double ?
Linearly interpolate between two numbers, a and b, by an extrapolation
factor t.
loadFontFromList (Uint8List list , {String ?fontFamily → Future <void >
Loads a font from a buffer and makes it available for rendering text.
runOnPlatformThread <R > (FutureOr <R > computation ()→ Future <R >
Runs computation on the platform thread and returns the result.
