DropDownGridView class

The basic implementation of the drop-down menu. It is implemented internally using GridView and supports single-selection and multi-selection operations.

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatefulWidget
• DropDownViewStatefulWidget
• DropDownGridView

Constructors

DropDownGridView.new({Key? key, required DropDownController controller, required List<DropDownItem> items, required int crossAxisCount, DropDownGridDataController? dataController, int? headerIndex, double mainAxisSpacing = 10, double crossAxisSpacing = 10, DropDownBoxStyle boxStyle = const DropDownBoxStyle(), DropDownItemStyle itemStyle = const DropDownItemStyle(activeBackgroundColor: Color(0xFFF5F5F5), activeIconColor: Colors.blue, activeTextStyle: TextStyle(color: Colors.blue)), IndexedWidgetBuilder? itemBuilder, OnDropDownItemTap? onDropDownItemTap, OnDropDownItemChanged? onDropDownItemChanged, int? maxMultiChoiceSize, OnDropDownItemLimitExceeded? onDropDownItemLimitExceeded, Widget? btnWidget, Widget? resetWidget, Widget? confirmWidget, DropDownButtonStyle buttonStyle = const DropDownButtonStyle(), OnDropDownItemsReset? onDropDownItemsReset, OnDropDownItemsConfirm? onDropDownItemsConfirm, OnDropDownHeaderUpdate? onDropDownHeaderUpdate, ScrollPhysics? physics, bool? shrinkWrap})

const

Properties

actualHeight → double

The height of the DropDownMenu content view

no setter, override

actualWidth → double?

The width of the DropDownMenu content view

no setter, override

boxStyle → DropDownBoxStyle

Style of the drop-down menu grid

final

btnWidget → Widget?

Button component of the drop-down menu content body in the multi-select state

final

buttonStyle → DropDownButtonStyle

The style of button component of the drop-down menu content body in the multi-select state

final

confirmWidget → Widget?

The confirmation button component of the drop-down menu content body in the multi-select state

final

controller → DropDownController

Controller of the drop-down menu

final

crossAxisCount → int

The number of columns of the sub-items of the drop-down menu content body

final

crossAxisSpacing → double

Column spacing of the sub-items of the drop-down menu content body

final

dataController → DropDownGridDataController?

Data controller of the drop-down menu content body

final

hashCode → int

The hash code for this object.

no setter, inherited

headerIndex → int?

Index of the drop-down menu header component

final

itemBuilder → IndexedWidgetBuilder?

Builder for the sub-items of the drop-down menu content body, used to customize Item

final

items → List<DropDownItem>

Data of the drop-down menu content body

final

itemStyle → DropDownItemStyle

Style of the drop-down menu grid item

final

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

mainAxisSpacing → double

The line spacing of the sub-items of the drop-down menu content body

final

maxMultiChoiceSize → int?

The maximum number of multiple choices for the sub-items of the drop-down menu content body

final

onDropDownHeaderUpdate → OnDropDownHeaderUpdate?

Callback event triggered after the drop-down menu selection is confirmed, used to update the status of the header component by the return value of the callback headerIndex should not be null when using this callback

final

onDropDownItemChanged → OnDropDownItemChanged?

The selected state change event of the child item of the drop-down menu content body

final

onDropDownItemLimitExceeded → OnDropDownItemLimitExceeded?

Callback event triggered when the number of multiple selections for the sub-items of the drop-down menu content body exceeds the maximum value

final

onDropDownItemsConfirm → OnDropDownItemsConfirm?

Click event of the confirmation button component of the drop-down menu content body in the multi-select state

final

onDropDownItemsReset → OnDropDownItemsReset?

The click event of the reset button component of the drop-down menu content body in the multi-select state

final

onDropDownItemTap → OnDropDownItemTap?

Click event for the child item of the drop-down menu content body

final

physics → ScrollPhysics?

Whether the drop-down menu content body is scrollable

final

resetWidget → Widget?

The reset button component of the drop-down menu content body in the multi-select state

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

shrinkWrap → bool?

GridView in the drop-down menu content body Whether the extent of the scroll view in the scrollDirection should be determined by the contents being viewed.

final

Methods

createElement() → StatefulElement

Creates a StatefulElement to manage this widget's location in the tree.

inherited

createState() → State<DropDownGridView>

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, int wrapWidth = 65}) → 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