The Flutter painting library.
To use, import package:flutter/painting.dart.
This library includes a variety of classes that wrap the Flutter engine's painting API for more specialized purposes, such as painting scaled images, interpolating between shadows, painting borders around boxes, etc.
In particular:
- Use the TextPainter class for painting text.
- Use Decoration (and more concretely BoxDecoration) for painting boxes.
Typedefs
-
VoidCallback(
) → void -
Signature of callbacks that have no arguments and return no data.
Functions
-
applyImageFit(
ImageFit fit, Size inputSize, Size outputSize) → FittedSizes -
Apply an ImageFit value.
-
hashList(
Iterable<Object> args) → int -
Combine the hashCodes of an arbitrary number of values from an Iterable into one value. This function will return the same value if given "null" as if given an empty list.
-
hashValues(
Object arg01, Object arg02, [ Object arg03 = _hashEnd, Object arg04 = _hashEnd, Object arg05 = _hashEnd, Object arg06 = _hashEnd, Object arg07 = _hashEnd, Object arg08 = _hashEnd, Object arg09 = _hashEnd, Object arg10 = _hashEnd, Object arg11 = _hashEnd, Object arg12 = _hashEnd, Object arg13 = _hashEnd, Object arg14 = _hashEnd, Object arg15 = _hashEnd, Object arg16 = _hashEnd, Object arg17 = _hashEnd, Object arg18 = _hashEnd, Object arg19 = _hashEnd, Object arg20 = _hashEnd ]) → int -
Combine up to twenty values' hashCodes into one value.
-
paintImage(
{Canvas canvas, Rect rect, Image image, ColorFilter colorFilter, ImageFit fit, ImageRepeat repeat: ImageRepeat.noRepeat, Rect centerSlice, FractionalOffset alignment }) → void -
Paints an image into the given rectangle in the canvas.
Enums
- Axis
-
The two cardinal directions in two dimensions.
- BlurStyle
-
Styles to use for blurs in MaskFilter objects.
- BorderStyle
-
The style of line to draw for a BorderSide in a Border.
- BoxShape
-
The shape to use when rendering a BoxDecoration.
- FilterQuality
-
Quality levels for image filters.
- FlutterLogoStyle
-
Possible ways to draw Flutter's logo.
- FontStyle
-
Whether to slant the glyphs in the font
- ImageFit
-
How an image should be inscribed into a box.
- ImageRepeat
-
How to paint any portions of a box not covered by an image.
- PaintingStyle
-
Strategies for painting shapes and paths on a canvas.
- StrokeCap
-
Styles to use for line endings.
- TextAffinity
-
Whether a TextPosition is visually upstream or downstream of its offset.
- TextAlign
-
Whether to align text horizontally
- TextBaseline
-
A horizontal line used for aligning text
- TextDecorationStyle
-
The style in which to draw a text decoration
- TextDirection
-
A direction in which text flows.
- TileMode
-
Defines what happens at the edge of the gradient.
- TransferMode
-
Algorithms to use when painting on the canvas.
- VertexMode
-
Defines how a list of points is interpreted when drawing a set of triangles.
Classes
- BackgroundImage
-
A background image for a box.
- Border
-
A border of a box, comprised of four sides.
- BorderRadius
-
An immutable set of radii for each corner of a rectangle.
- BorderSide
-
A side of a border of a box.
- BoxDecoration
-
An immutable description of how to paint a box.
- BoxPainter
-
A stateful class that can paint a particular Decoration.
- BoxShadow
-
A shadow cast by a box.
- Canvas
-
An interface for recording graphical operations.
- Color
-
An immutable 32 bit color value in ARGB
- 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.
- Decoration
-
A description of a box decoration (a decoration applied to a Rect).
- EdgeInsets
-
An immutable set of offsets in each of the four cardinal directions.
- FittedSizes
-
The pair of sizes returned by applyImageFit.
- FlutterLogoDecoration
-
An immutable description of how to paint Flutter's logo.
- FontWeight
-
The thickness of the glyphs used to draw the text
- FractionalOffset
-
An offset that's expressed as a fraction of a Size.
- Gradient
-
A 2D gradient.
- HSVColor
-
A color represented using alpha, hue, saturation, and value.
- ImageConfiguration
-
Configuration information passed to the ImageProvider.resolve method to select a specific image.
- ImageShader
-
A shader (as used by Paint.shader) that tiles an image.
- LinearGradient
-
A 2D linear gradient.
- 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.
- MatrixUtils
-
Utility functions for working with matrices.
- Offset
-
An immutable 2D floating-point offset.
- Paint
-
A description of the style to use when drawing on a Canvas.
- Path
-
A complex, one-dimensional subset of a plane.
- Point
-
An immutable 2D floating-point x,y coordinate pair.
- RadialGradient
-
A 2D radial gradient.
- Radius
-
A radius for either circular or elliptical shapes.
- Rect
-
An immutable 2D, axis-aligned, floating-point rectangle whose coordinates are relative to an origin point.
- RRect
-
A rounded rectangle with the custom radii for all four corners.
- RSTransform
-
A transform consisting of a translation, a rotation, and a uniform scale.
- Shader
-
Base class for objects such as Gradient and ImageShader which correspond to shaders as used by Paint.shader.
- Size
-
Holds a 2D floating-point size.
- TextDecoration
-
A linear decoration to draw near the text
- TextPainter
- TextPosition
-
A visual 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.
- TextSpan
-
An immutable span of text.
- TextStyle
-
An immutable style in which paint text.