SmoothCategoryPicker<T extends Comparable<T>> class Null safety

A Picker for hierarchical categories or other hierarchical data.

This is a generic widget for displaying and picking categories out of a hierarchy. It allows adding of items, and editing of the selected categories.

It displays the list of categories at the top as deletable chips, and a breadcrumb display showing the path to the currently displayed category.

It is designed to allow random access to the categories by requesting information about a category "path" through the categoryFinder callback.

It can then notify of changes in the path through onPathChanged, the set of selected categories through onCategoriesChanged, and request a new category to be added.

Constructors

SmoothCategoryPicker({required CategoryPathSelector<T> categoryFinder, Set<T>? currentCategories, required List<T> currentPath, required CategoriesChangedCallback<T> onCategoriesChanged, required CategoryPathChangedCallback<T> onPathChanged, AddCategoryCallback<T>? onAddCategory, dynamic key})

Properties

categoryFinder → CategoryPathSelector<T>
A callback used to collect information about the current category to be displayed. [...]
final
currentCategories → Set<T>
The current set of selected categories. [...]
final
currentPath → List<T>
The "path" to the currently displayed category. [...]
final
hashCode → int
The hash code for this object. [...]
read-only, inherited
onAddCategory → AddCategoryCallback<T>?
A callback that is called whenever the user requests a new category via the floating action button in the chooser.
final
onCategoriesChanged → CategoriesChangedCallback<T>
A callback called when the categories list changes.
final
onPathChanged → CategoryPathChangedCallback<T>
A callback called when the selected path changes.
final
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited

Methods

createState() → dynamic
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
toString() → String
A string representation of this object. [...]
inherited

Operators

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