Pagewise<T> class abstract

An abstract base class for widgets that fetch their content one page at a time.

The widget fetches the page when we scroll down to it, and then keeps it in memory

You can build your own Pagewise widgets by extending this class and returning your builder in the builder function which provides you with the Pagewise state. Look PagewiseListView and PagewiseGridView for examples.

See also:

Inheritance
Implementers

Constructors

Pagewise({int? pageSize, PageFuture<T>? pageFuture, Key? key, PagewiseLoadController<T>? pageLoadController, LoadingBuilder? loadingBuilder, RetryBuilder? retryBuilder, NoItemsFoundBuilder? noItemsFoundBuilder, bool showRetry = true, required ItemBuilder<T> itemBuilder, ErrorBuilder? errorBuilder, required PagewiseBuilder<T> builder})
Creates a pagewise widget.

Properties

builder PagewiseBuilder<T>
The actual builder that builds the Pagewise widget. It is called and provided the PagewiseState. This function is important only for classes extending Pagewise. See PagewiseListView and PagewiseGridView for examples.
final
errorBuilder ErrorBuilder?
Called with an error object if an error occurs when loading the page
final
hashCode int
The hash code for this object.
no setterinherited
itemBuilder ItemBuilder<T>
Called to build each entry in the view.
final
key Key?
Controls how one widget replaces another widget in the tree.
finalinherited
loadingBuilder LoadingBuilder?
Called when loading each page.
final
noItemsFoundBuilder NoItemsFoundBuilder?
Called when no items are found
final
pageFuture PageFuture<T>?
Called whenever a new page (or batch) is to be fetched
final
pageLoadController PagewiseLoadController<T>?
The controller that controls the loading of pages.
final
pageSize int?
The number of entries per page
final
retryBuilder RetryBuilder?
Called when a page fails to load and showRetry is set to true.
final
runtimeType Type
A representation of the runtime type of the object.
no setterinherited
showRetry bool
Whether to show a retry button when page fails to load.
final

Methods

createElement() StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() PagewiseState<T>
Creates the mutable state for this widget at a given location in the tree.
override
debugDescribeChildren() List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a one-line detailed description of the object.
inherited
toStringShort() String
A short, textual description of this widget.
inherited

Operators

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