FocusHistoryManager class

Focus history manager using stack structure for focus memory restoration.

Each DpadNavigator has its own FocusHistoryManager instance, ensuring focus history is isolated per navigator scope.

Memory Management: Automatically cleans up disposed FocusNodes to prevent memory leaks. Call cleanup periodically or when widgets are destroyed.

Constructors

FocusHistoryManager({int maxSize = 20})

Creates a new focus history manager.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

isEmpty → bool

Whether the history stack is empty.

no setter

length → int

The number of entries in the history stack.

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

cleanup() → void

Manual cleanup method to free memory from disposed FocusNodes.

clear() → void

Clears all focus history entries.

getCurrent() → FocusHistoryEntry?

Gets the current focus entry.

getHistory() → List<FocusHistoryEntry>

Gets the complete history as a read-only list.

getLastFocusInRegion(String region) → FocusHistoryEntry?

Gets the last focus entry for a specific region.

getLastFocusInRoute(String routeName) → FocusHistoryEntry?

Gets the last focus entry for a specific route.

getLastPoppedEntry() → FocusHistoryEntry?

Gets the last popped focus entry.

getPrevious() → FocusHistoryEntry?

Gets the previous focus entry.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

pop() → FocusHistoryEntry?

Pops the current focus entry from the stack.

push(FocusHistoryEntry entry) → void

Pushes focus entry to the history stack.

removeInvalidEntries() → int

Removes invalid entries from the history stack.

setMaxSize(int size) → void

Sets the maximum number of history entries to keep.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited