SelectionModel<T> class abstract

Provides pattern to manage a collection of selected values. This is used in model-view architecture to notify interested parties of changes to selection.

Implemented types
Mixed-in types
Implementers

Constructors

SelectionModel.empty()
Creates an immutable, constant model.
const
factory
SelectionModel.multi({List<T> selectedValues, KeyProvider<T>? keyProvider})
Creates a multi-selection model.
factory
SelectionModel.radio(T selected)
Creates a single-selection model that always has a value selected.
factory
SelectionModel.single({T? selected, KeyProvider<T>? keyProvider})
Creates a single-selection model.
factory

Properties

changes → Stream<List<ChangeRecord>>
Emits a list of changes when the state of the object changes.
no setterinherited
hashCode → int
The hash code for this object.
no setterinherited
hasObservers → bool
True if this object has any observers.
no setterinherited
hasSelectionObservers → bool
Returns true if a subscriber is listening to selectionChanges.
no setterinherited
isEmpty → bool
Returns true if selection is empty.
no setter
isNotEmpty → bool
Returns true if selection is not empty.
no setter
isSingleSelect → bool
Whether or not the selection model is single select.
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
selectedValues → Iterable<T>
Returns ordered list of selected values.
no setter
selectionChanges → Stream<List<SelectionChangeRecord<T>>>
A stream that returns changes to selected elements.
no setterinherited

Methods

castIterable(Iterable values) → Iterable<T>
Casts values into an Iterable
override
clear() → void
Clears selection.
deliverChanges() → bool
If hasObservers, synchronously emits changes that have been queued.
inherited
deliverSelectionChanges() → bool
Synchronously deliver all SelectionChangeRecords.
inherited
deselect(T value) → bool
Removes a value from list of selected items.
isSelected(T value) → bool
Returns whether an item is selected.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
notifyChange([ChangeRecord? change]) → void
Schedules change to be delivered.
inherited
notifyPropertyChange<T>(Symbol field, T oldValue, T newValue) → T
Notify that the field name of this object has been changed.
inherited
notifySelectionChange({Iterable<T> added, Iterable<T> removed}) → void
Schedules a SelectionChangeRecord.
inherited
observed() → void
May override to be notified when changes is first observed.
inherited
select(T value) → bool
Adds value to list of selected items.
toString() → String
A string representation of this object.
inherited
unobserved() → void
May override to be notified when changes is no longer observed.
inherited

Operators

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