VirtualGridView class
A high-performance virtual scrolling grid view.
This widget provides efficient memory usage by only rendering grid items that are currently visible in the viewport.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatelessWidget
- VirtualGridView
Constructors
- VirtualGridView({Key? key, required int itemCount, required IndexedWidgetBuilder itemBuilder, required SliverGridDelegate gridDelegate, ScrollController? controller, ScrollPhysics? physics, EdgeInsetsGeometry? padding, double cacheExtent = 250.0})
-
Creates a virtual grid view.
const
Properties
- cacheExtent → double
-
The amount of space to cache beyond the visible viewport.
final
- controller → ScrollController?
-
Controller for managing scroll behavior.
final
- gridDelegate → SliverGridDelegate
-
Controls the layout of the children within the grid.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- itemBuilder → IndexedWidgetBuilder
-
Builder function for creating grid items.
final
- itemCount → int
-
The total number of items in the grid.
final
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- padding → EdgeInsetsGeometry?
-
The amount of space by which to inset the children.
final
- physics → ScrollPhysics?
-
How the scroll view should respond to user input.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
build(
BuildContext context) → Widget -
Describes the part of the user interface represented by this widget.
override
-
createElement(
) → StatelessElement -
Creates a StatelessElement to manage this widget's location in the tree.
inherited
-
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, int wrapWidth = 65}) → 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