DropDownButton<T> class
Button that shows a list of ContextMenuItem when pressed. The current value defines the selected item.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- DropDownButton
Constructors
-
DropDownButton({Key? key, required ContextMenuItemBuilder<
T> itemBuilder, T? value, ContextMenuItemSelected<T> ? onSelected, ContextMenuCanceled? onCanceled, String? tooltip, bool enabled = true, DropDownThemeData? theme}) -
const
Properties
- enabled → bool
-
If this button is enabled.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
-
itemBuilder
→ ContextMenuItemBuilder<
T> -
The list of ContextMenuItem used for the context menu.
final
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- onCanceled → ContextMenuCanceled?
-
Called when the user cancels the context menu selection.
final
-
onSelected
→ ContextMenuItemSelected<
T> ? -
Called when the context menu selection changes.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- theme → DropDownThemeData?
-
The style DropDownThemeData of the drop down.
final
- tooltip → String?
-
The button tooltip.
final
- value → T?
-
The current value in the context menu.
final
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → State< DropDownButton< T> > -
Creates the mutable state for this widget at a given location in the tree.
override
-
debugDescribeChildren(
) → List< DiagnosticsNode> -
Returns a list of
DiagnosticsNode
objects describing this node's children.inherited -
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
Add additional properties associated with the node.
inherited
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toDiagnosticsNode(
{String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode -
Returns a debug representation of the object that is used by debugging
tools and by DiagnosticsNode.toStringDeep.
inherited
-
toString(
{DiagnosticLevel minLevel = DiagnosticLevel.info}) → String -
A string representation of this object.
inherited
-
toStringDeep(
{String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String -
Returns a string representation of this node and its descendants.
inherited
-
toStringShallow(
{String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String -
Returns a one-line detailed description of the object.
inherited
-
toStringShort(
) → String -
A short, textual description of this widget.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited