DropdownButtonState<T> class

State for a DropdownButton.

Inheritance
Implemented types

Constructors

Properties

buttonBounds ↔ Rect
The on-screen bounds of the dropdown button.
getter/setter pair
context → BuildContext
The location in the tree where this widget builds.
no setterinherited
hashCode → int
The hash code for this object.
no setterinherited
internalContext ↔ BuildContext?
Undocumented public member.
getter/setter pairinherited
internalWidget ↔ DropdownButton<T>?
Undocumented public member.
getter/setter pairinherited
isOpen ↔ bool
Whether the dropdown menu is currently open.
getter/setter pair
mounted → bool
Whether this State object is currently in a tree.
no setterinherited
overlayEntry ↔ OverlayEntry?
The overlay entry representing the open menu.
getter/setter pair
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
selectedIndex ↔ int
The index of the currently selected or highlighted item.
getter/setter pair
widget → DropdownButton<T>
The current configuration.
no setterinherited

Methods

build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
override
closeDropdown() → void
Closes the dropdown menu.
didChangeDependencies() → void
Called when a dependency of this State object changes.
inherited
didUpdateWidget(covariant DropdownButton<T> oldWidget) → void
Called whenever the widget configuration changes.
override
dispose() → void
Called when this object is removed from the tree permanently.
override
handleKeyEvent(KeyEvent event) → bool
Handles incoming keyboard events to navigate and interact with the menu.
override
initState() → void
Called when this object is inserted into the tree.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
openDropdown() → void
Opens the dropdown menu.
reassemble() → void
Called when the application is reassembled during debugging (hot reload).
inherited
selectItem(int index) → void
Selects the item at the specified index and closes the menu.
setState(VoidCallback fn) → void
Notifies the framework that the internal state of this object has changed.
inherited
toggleDropdown() → void
Toggles the dropdown menu open or closed.
toString() → String
A string representation of this object.
inherited
updateSelectedIndex() → void
Synchronizes the selectedIndex with the current DropdownButton.value.

Operators

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