<itemvalue="The callback provided to onChanged should update the state of the parent [StatefulWidget] using the [State.setState] method, so that the parent gets rebuilt; for example:"/>
<itemvalue="If null, the slider will be displayed as disabled."/>
<itemvalue="Called during a drag when the user is selecting a new value for the slider by dragging. The slider passes the new value to the callback but does not actually change state until the parent widget rebuilds the slider with the new value."/>
<itemvalue="It is safe to call [moveNext] after it has already returned `false`, but it must keep returning `false` and not have any other effect."/>
<itemvalue="Should be called before reading [current]. If the call to `moveNext` returns `true`, then [current] will contain the next element of the iteration until `moveNext` is called again. If the call returns `false`, there are no further elements and [current] should not be used any more."/>
<itemvalue="Whether the raster cache should be told that this painting is likely to change in the next frame. This hint tells the compositor not to cache the layer containing this widget because the cache will not be used in the future. If this hint is not set, the compositor will apply its own heuristics to decide whether the layer is likely to be reused in the future. This flag can't be set to true if both [painter] and [foregroundPainter] are null because this flag will be ignored in such case."/>
<itemvalue="Whether the painting is complex enough to benefit from caching. The compositor contains a raster cache that holds bitmaps of layers in order to avoid the cost of repeatedly rendering those layers on each frame. If this flag is not set, then the compositor will apply its own heuristics to decide whether the layer containing this widget is complex enough to benefit from caching. This flag can't be set to true if both [painter] and [foregroundPainter] are null because this flag will be ignored in such case."/>
<itemvalue="Synchronously creates a handle to an image of this picture. {@template dart.ui.painting.Picture.toImageSync} The returned image will be `width` pixels wide and `height` pixels high. The picture is rasterized within the 0 (left), 0 (top), `width` (right), `height` (bottom) bounds. Content outside these bounds is clipped. The image object is created and returned synchronously, but is rasterized asynchronously. If the rasterization fails, an exception will be thrown when the image is drawn to a [Canvas]. If a GPU context is available, this image will be created as GPU resident and not copied back to the host. This means the image will be more efficient to draw. If no GPU context is available, the image will be rasterized on the CPU. {@endtemplate}"/>
<itemvalue="Using [ImageByteFormat.rawRgba] on an image in the color space [ColorSpace.extendedSRGB] will result in the gamut being squished to fit into the sRGB gamut, resulting in the loss of wide-gamut colors."/>
<itemvalue="Either the [width] and [height] arguments should be specified, or the widget should be placed in a context that sets tight layout constraints. Otherwise, the image dimensions will change as the image is loaded, which will result in ugly layout changes."/>
<itemvalue="This only accepts compressed image formats (e.g. PNG). Uncompressed formats like rawRgba (the default format of [dart:ui.Image.toByteData]) will lead to exceptions."/>
<itemvalue="Creates a widget that displays an [ImageStream] obtained from a [Uint8List]. The `bytes` argument specifies encoded image bytes, which can be encoded in any of the following supported image formats: {@macro dart.ui.imageFormats}"/>
<itemvalue="Unencoded bytes, in the image's existing format. For example, a grayscale image may use a single 8-bit channel for each pixel."/>
<itemvalue="A loss-less compression format for images. This format is well suited for images with hard edges, such as screenshots or sprites, and images with text. Transparency is supported. The PNG format supports images up to 2,147,483,647 pixels in either dimension, though in practice available memory provides a more immediate limitation on maximum image size."/>
<itemvalue="Raw RGBA format. Unencoded bytes, in RGBA row-primary form with premultiplied alpha, 8 bits per channel."/>
<itemvalue="Parses the [host] as an IP version 4 (IPv4) address, returning the address as a list of 4 bytes in network byte order (big endian). Throws a [FormatException] if [host] is not a valid IPv4 address representation."/>
<itemvalue="The port part of the authority component. The value is the default port if there is no port number in the authority component. That's 80 for http, 443 for https, and 0 for everything else."/>
<itemvalue="Each pixel is 32 bits, with the highest 8 bits encoding red, the next 8 bits encoding green, the next 8 bits encoding blue, and the lowest 8 bits encoding alpha. Premultiplied alpha is used."/>
<itemvalue="Creates an image descriptor from raw image pixels. The `pixels` parameter is the pixel data. They are packed in bytes in the order described by `pixelFormat`, then grouped in rows, from left to right, then top to bottom. The `rowBytes` parameter is the number of bytes consumed by each row of pixels in the data buffer. If unspecified, it defaults to `width` multiplied by the number of bytes per pixel in the provided `format`. Not async because there's no expensive work to do here."/>
<itemvalue="A descriptor of data that can be turned into an [Image] via a [Codec]. Use this class to determine the height, width, and byte size of image data before decoding it."/>
<itemvalue="The returned future can complete with an error if the image decoding has failed."/>
<itemvalue="Scaling the image to larger than its intrinsic size should usually be avoided, since it causes the image to use more memory than necessary. Instead, prefer scaling the [Canvas] transform. If the image must be scaled up, the `allowUpscaling` parameter must be set to true."/>
<itemvalue="The `targetWidth` and `targetHeight` arguments specify the size of the output image, in image pixels. If they are not equal to the intrinsic dimensions of the image, then the image will be scaled after being decoded. If the `allowUpscaling` parameter is not set to true, both dimensions will be capped at the intrinsic dimensions of the image, even if only one of them would have exceeded those intrinsic dimensions. If exactly one of these two arguments is specified, then the aspect ratio will be maintained while forcing the image to match the other given dimension. If neither is specified, then the image maintains its intrinsic size."/>
<itemvalue="{@template dart.ui.imageFormats} JPEG, PNG, GIF, Animated GIF, WebP, Animated WebP, BMP, and WBMP. Additional formats may be supported by the underlying platform. Flutter will attempt to call platform API to decode unrecognized formats, and if the platform API supports decoding the image Flutter will be able to render it. {@endtemplate}"/>
<itemvalue="The `list` parameter is the binary image data (e.g a PNG or GIF binary data). The data can be for either static or animated images. The following image formats are supported:"/>
<itemvalue="This method is a convenience wrapper around the [ImageDescriptor] API, and using [ImageDescriptor] directly is preferred since it allows the caller to make better determinations about how and whether to use the `targetWidth` and `targetHeight` parameters."/>
<itemvalue="Instantiates an image [Codec]."/>
<itemvalue="allow upscaling"/>
<itemvalue="Creates an image from a list of bytes. This function attempts to interpret the given bytes an image. If successful, the returned [Future] resolves to the decoded image. Otherwise, the [Future] resolves to null. If the image is animated, this returns the first frame. Consider [instantiateImageCodec] if support for animated images is necessary. This function differs from [decodeImageFromList] in that it defers to [PaintingBinding.instantiateImageCodecWithSize], and therefore can be mocked in tests."/>
<itemvalue="Performs a connect to the message broker with an optional username and password for the purposes of authentication. If a username and password are supplied these will override any previously set in a supplied connection message so if you supply your own connection message and use the authenticateAs method to set these parameters do not set them again here."/>
<itemvalue="The flutter tool converts all asset keys with spaces into URI encoded paths (replacing ' ' with '%20', for example). We perform the same encoding here so that users can load assets with the same key they have written in the pubspec."/>
<itemvalue="Creates a fragment program from the asset with key [assetKey]. The asset must be a file produced as the output of the `impellerc` compiler. The constructed object should then be reused via the [fragmentShader] method to create [Shader] objects that can be used by [Paint.shader]."/>
