TreeItemExpandDefaultHandler<T> class
Default handler for tree item expand/collapse operations.
Manages the expansion state of tree nodes when users interact with expand/collapse controls.
Example:
final handler = TreeItemExpandDefaultHandler(nodes, targetNode, (updated) {
setState(() => nodes = updated);
});
Constructors
-
TreeItemExpandDefaultHandler(List<
TreeNode< nodes, TreeNode<T> >T> target, ValueChanged<List< onChanged)TreeNode< >T> > - Creates a TreeItemExpandDefaultHandler.
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
-
nodes
→ List<
TreeNode< T> > -
The current list of tree nodes.
final
-
onChanged
→ ValueChanged<
List< TreeNode< >T> > -
Callback when expansion state changes.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
-
target
→ TreeNode<
T> -
The target node to expand or collapse.
final
Methods
-
call(
bool expanded) → void - Handles an expand/collapse event.
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited