ListViewObserver class
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- ListViewObserver
Constructors
-
ListViewObserver({Key? key, required Widget child, required List<
BuildContext> sliverListContexts(), required dynamic onObserve(Map<BuildContext, ListViewObserveModel> ), double leadingOffset = 0, double dynamicLeadingOffset()?, double toNextOverPercent = 1}) -
const
Properties
- child → Widget
-
final
- dynamicLeadingOffset → double Function()?
-
Calculate offset dynamically
If this callback is implemented, the leadingOffset property will be
invalid.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- leadingOffset → double
-
Calculate offset.
final
-
onObserve
→ dynamic Function(Map<
BuildContext, ListViewObserveModel> ) -
The callback of geting observed result map.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
-
sliverListContexts
→ List<
BuildContext> Function() -
The callback of getting all sliverList's buildContext.
final
- toNextOverPercent → double
-
After the internal logic figure out the first child widget, if the
proportion of the size of the child widget blocked to its own size exceeds
the value toNextOverPercent, the next child widget will be the first
child widget.
final
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → State< ListViewObserver> -
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