CupertinoPicker class

An iOS-styled picker.

Displays its children widgets on a wheel for selection and calls back when the currently selected item changes.

Can be used with showModalBottomSheet to display the picker modally at the bottom of the screen.

See also:

Inheritance

Constructors

CupertinoPicker({Key key, double diameterRatio: _kDefaultDiameterRatio, Color backgroundColor: _kDefaultBackground, double offAxisFraction: 0.0, bool useMagnifier: false, double magnification: 1.0, FixedExtentScrollController scrollController, @required double itemExtent, @required ValueChanged<int> onSelectedItemChanged, @required List<Widget> children, bool looping: false })
Creates a picker from a concrete list of children. [...]
CupertinoPicker.builder({Key key, double diameterRatio: _kDefaultDiameterRatio, Color backgroundColor: _kDefaultBackground, double offAxisFraction: 0.0, bool useMagnifier: false, double magnification: 1.0, FixedExtentScrollController scrollController, @required double itemExtent, @required ValueChanged<int> onSelectedItemChanged, @required Widget itemBuilder, int childCount })
Creates a picker from an IndexedWidgetBuilder callback where the builder is dynamically invoked during layout. [...]

Properties

backgroundColor Color
Background color behind the children. [...]
final
childDelegate ListWheelChildDelegate
A delegate that lazily instantiates children.
final
diameterRatio double
Relative ratio between this picker's height and the simulated cylinder's diameter. [...]
final
itemExtent double
The uniform height of all children. [...]
final
magnification double
The zoomed-in rate of the magnifier, if it is used. [...]
final
offAxisFraction double
How much the wheel is horizontally off-center, as a fraction of its width. This property creates the visual effect of looking at a vertical wheel from its side where its vanishing points at the edge curves to one side instead of looking at the wheel head-on. [...]
final
onSelectedItemChanged ValueChanged<int>
An option callback when the currently centered item changes. [...]
final
scrollController FixedExtentScrollController
A FixedExtentScrollController to read and control the current item. [...]
final
useMagnifier bool
Whether to use the magnifier for the center item of the wheel.
final
hashCode int
The hash code for this object. [...]
read-only, inherited
key Key
Controls how one widget replaces another widget in the tree. [...]
final, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited

Methods

createState() State<StatefulWidget>
Creates the mutable state for this widget at a given location in the tree. [...]
createElement() StatefulElement
Creates a StatefulElement to manage this widget's location in the tree. [...]
inherited
debugDescribeChildren() List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children. [...]
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node. [...]
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
@pragma('vm:entry-point'), inherited
toDiagnosticsNode({String name, DiagnosticsTreeStyle style }) DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by toStringDeep. [...]
inherited
toString({DiagnosticLevel minLevel: DiagnosticLevel.debug }) String
Returns 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 ==(dynamic other) bool
The equality operator. [...]
inherited