ChartEmptyScope class
Wrapper that shows emptyWidget when all data points in dataSets have empty x and y (both zero). Otherwise builds child.
Use this to display an empty state instead of the chart when there is no meaningful data.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatelessWidget
- ChartEmptyScope
Constructors
-
ChartEmptyScope({Key? key, required List<
ChartDataSet> dataSets, required Widget child, Widget? emptyWidget}) -
const
Properties
- child → Widget
-
The chart (or other) content to show when there is data.
final
-
dataSets
→ List<
ChartDataSet> -
The data sets to check. If empty or all points are (0, 0), emptyWidget
is shown.
final
- emptyWidget → Widget?
-
Widget to show when all data points are empty. Defaults to SizedBox.shrink.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- 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