ChartVisibilityController class
Controller that tracks which series are currently hidden.
Pass an instance to ChartLegendScope (or use it standalone with a ChartLegend you build yourself) to keep visibility state outside the widget tree, for example to persist it across rebuilds or share it across multiple charts.
Example
final controller = ChartVisibilityController();
// ...
controller.hide(Colors.red);
controller.toggle(Colors.blue);
if (controller.isHidden(Colors.red)) { /* ... */ }
- Inheritance
-
- Object
- ChangeNotifier
- ChartVisibilityController
Constructors
-
ChartVisibilityController({Iterable<
Color> initiallyHidden = const <Color>[]})
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- hasListeners → bool
-
Whether any listeners are currently registered.
no setterinherited
-
Unmodifiable view of the hidden colors.
no setter
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
addListener(
VoidCallback listener) → void -
Register a closure to be called when the object changes.
inherited
-
dispose(
) → void -
Discards any resources used by the object. After this is called, the
object is not in a usable state and should be discarded (calls to
addListener will throw after the object is disposed).
inherited
-
filter(
List< ChartDataSet> dataSets) → List<ChartDataSet> - Filters a list of ChartDataSets, removing any whose color is hidden.
-
hide(
Color color) → void -
isHidden(
Color color) → bool -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
notifyListeners(
) → void -
Call all the registered listeners.
inherited
-
removeListener(
VoidCallback listener) → void -
Remove a previously registered closure from the list of closures that are
notified when the object changes.
inherited
-
show(
Color color) → void -
showAll(
) → void -
solo(
Color color, Iterable< Color> all) → void -
Hide everything except
color. Useful for "solo" legend interactions (double-tap or long-press). -
toggle(
Color color) → void -
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited