TreemapTooltipSettings class Null safety

Customizes the appearance of the tooltip.

late List<SocialMediaUsers> _socialMediaUsersData;

  @override
  void initState() {
    _socialMediaUsersData = <SocialMediaUsers>[
      SocialMediaUsers('India', 'Facebook', 280),
      SocialMediaUsers('India', 'Instagram', 88),
      SocialMediaUsers('USA', 'Facebook', 190),
      SocialMediaUsers('USA', 'Instagram', 120),
      SocialMediaUsers('Japan', 'Twitter', 48),
      SocialMediaUsers('Japan', 'Instagram', 31),
    ];
    super.initState();
  }

@override
  Widget build(BuildContext context) {
    return Scaffold(
      body: SfTreemap(
        dataCount: _socialMediaUsersData.length,
        weightValueMapper: (int index) {
          return _socialMediaUsersData[index].usersInMillions;
        },
        tooltipSettings: TreemapTooltipSettings(
          color: Colors.blue,
          borderWidth: 2.0,
          borderColor: Colors.white,
        ),
        levels: [
          TreemapLevel(
              padding: EdgeInsets.all(2),
              groupMapper: (int index) {
                return _socialMediaUsersData[index].country;
              },
              color: Colors.red,
              tooltipBuilder: (BuildContext context, TreemapTile tile) {
                return Padding(
                  padding: EdgeInsets.all(10.0),
                  child: Text(
                      'Country ${tile.group}' + '\n Users ${tile.weight}'),
                );
              }),
        ],
      ),
    );
  }

class SocialMediaUsers {
  const SocialMediaUsers(
    this.country,
    this.socialMedia,
    this.usersInMillions,
  );
  final String country;
  final String socialMedia;
  final double usersInMillions;
}

See also:

Inheritance
Annotations

Constructors

TreemapTooltipSettings({Color? color, Color? borderColor, double borderWidth = 1.0, BorderRadiusGeometry borderRadius = const BorderRadius.all(Radius.circular(4.0))})
Creates TreemapTooltipSettings. [...]
const

Properties

borderColor Color?
Specifies the border color applies to the tooltip. [...]
final
borderRadius BorderRadiusGeometry
Specifies the border radius applies to the tooltip. [...]
final
borderWidth double
Specifies the border width applies to the tooltip. [...]
final
color Color?
Fills the tooltip by this color. [...]
final
hashCode int
The hash code for this object. [...]
read-only, override
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited

Methods

copyWith({Color? color, Color? borderColor, double? borderWidth, BorderRadiusGeometry? borderRadius}) TreemapTooltipSettings
Creates a copy of this class but with the given fields replaced with the new values.
debugDescribeChildren() List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children. [...]
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node. [...]
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent 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 brief description of this object, usually just the runtimeType and the hashCode. [...]
inherited

Operators

operator ==(Object other) bool
The equality operator. [...]
override