DragAndDropView class

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatefulWidget
• MainGridView
• DragAndDropView

Available extensions

• WidgetExtension

Constructors

DragAndDropView({Key? key, bool reverse = false, Widget? header, ScrollController? controller, bool? primary, ScrollPhysics? physics, bool isCustomFeedback = false, bool isCustomChildWhenDragging = false, required WillAcceptCallback onWillAccept, required ReorderCallback onReorder, EdgeInsetsGeometry? padding, required SliverGridDelegate gridDelegate, required IndexedWidgetBuilder itemBuilder, int? itemCount, bool addAutomaticKeepAlives = true, bool addRepaintBoundaries = true, bool addSemanticIndexes = true, double? cacheExtent, int? semanticChildCount, DragStartBehavior dragStartBehavior = DragStartBehavior.start, ScrollViewKeyboardDismissBehavior keyboardDismissBehavior = ScrollViewKeyboardDismissBehavior.manual, WidgetPositionBuilder? feedback, WidgetPositionBuilder? childWhenDragging})

DragAndDropGridView has the all same parameters (except shrinkWrap and scrollDirection) that GridView.builder constructor

const

DragAndDropView.horizontal({Key? key, bool reverse = false, ScrollController? controller, bool? primary, ScrollPhysics? physics, bool isCustomFeedback = false, bool isCustomChildWhenDragging = false, required WillAcceptCallback onWillAccept, required ReorderCallback onReorder, EdgeInsetsGeometry? padding, required SliverGridDelegate gridDelegate, required IndexedWidgetBuilder itemBuilder, int? itemCount, bool addAutomaticKeepAlives = true, bool addRepaintBoundaries = true, bool addSemanticIndexes = true, double? cacheExtent, int? semanticChildCount, DragStartBehavior dragStartBehavior = DragStartBehavior.start, ScrollViewKeyboardDismissBehavior keyboardDismissBehavior = ScrollViewKeyboardDismissBehavior.manual, WidgetPositionBuilder? feedback, WidgetPositionBuilder? childWhenDragging})

This constructor use to achive the Horizontal Reorderable / Re-Indexing feature in DragAndDropGridView. Providing a non-null itemCount improves the ability of the GridView to estimate the maximum scroll extent.

const

DragAndDropView.horizontalStickyHeader({Key? key, bool reverse = false, ScrollController? controller, bool? primary, ScrollPhysics? physics, bool isCustomFeedback = false, bool isCustomChildWhenDragging = false, required WillAcceptCallback onWillAccept, WillAcceptCallback? onWillAcceptHeader, required IndexedWidgetBuilder itemBuilderHeader, bool allHeaderChildNonDraggable = false, SliverGridDelegate? headerGridDelegate, required ReorderCallback onReorder, ReorderCallback? onReorderHeader, int? headerItemCount, EdgeInsetsGeometry? headerPadding, EdgeInsetsGeometry? padding, required SliverGridDelegate gridDelegate, required IndexedWidgetBuilder itemBuilder, int? itemCount, bool addAutomaticKeepAlives = true, bool addRepaintBoundaries = true, bool addSemanticIndexes = true, double? cacheExtent, int? semanticChildCount, DragStartBehavior dragStartBehavior = DragStartBehavior.start, ScrollViewKeyboardDismissBehavior keyboardDismissBehavior = ScrollViewKeyboardDismissBehavior.manual, WidgetPositionBuilder? feedback, WidgetPositionBuilder? childWhenDragging})

To achive the sticky header in horizontal gridview just call this horizontalStickyHeader constructor. By Default allHeaderChildNonDraggable is set to false making all header draggable. onWillAcceptHeader (Implement your logic on accepting and rejecting the drop of an header element), onReorderHeader (implement your logic for reodering and reindexing the elements) And if you want the header to be non-draggable element simple set allHeaderChildNonDraggable to true. itemBuilderHeader will be called only with indices greater than or equal to

const

DragAndDropView.stickyHeader({Key? key, bool reverse = false, ScrollController? controller, bool? primary, ScrollPhysics? physics, bool isCustomFeedback = false, bool isCustomChildWhenDragging = false, required WillAcceptCallback onWillAccept, WillAcceptCallback? onWillAcceptHeader, required IndexedWidgetBuilder itemBuilderHeader, bool allHeaderChildNonDraggable = false, SliverGridDelegate? headerGridDelegate, required ReorderCallback onReorder, ReorderCallback? onReorderHeader, int? headerItemCount, EdgeInsetsGeometry? headerPadding, EdgeInsetsGeometry? padding, required SliverGridDelegate gridDelegate, required IndexedWidgetBuilder itemBuilder, int? itemCount, bool addAutomaticKeepAlives = true, bool addRepaintBoundaries = true, bool addSemanticIndexes = true, double? cacheExtent, int? semanticChildCount, DragStartBehavior dragStartBehavior = DragStartBehavior.start, ScrollViewKeyboardDismissBehavior keyboardDismissBehavior = ScrollViewKeyboardDismissBehavior.manual, WidgetPositionBuilder? feedback, WidgetPositionBuilder? childWhenDragging})

To achive the sticky header in gridview just call this stickyHeader constructor. By Default allHeaderChildNonDraggable is set to false making all header draggable. onWillAcceptHeader (Implement your logic on accepting and rejecting the drop of an header element), onReorderHeader (implement your logic for reodering and reindexing the elements) And if you want the header to be non-draggable element simple set allHeaderChildNonDraggable to true. itemBuilderHeader will be called only with indices greater than or equal to

const

Properties

addAutomaticKeepAlive → bool

final, inherited

addRepaintBoundaries → bool

final, inherited

addSemanticIndexes → bool

final, inherited

allHeaderChildNonDraggable → bool

final, inherited

cacheExtent → double?

final, inherited

childWhenDragging → WidgetPositionBuilder?

final, inherited

controller → ScrollController?

final, inherited

dragStartBehavior → DragStartBehavior

final, inherited

feedback → WidgetPositionBuilder?

final, inherited

gridDelegate → SliverGridDelegate

final, inherited

hashCode → int

The hash code for this object.

no setter, inherited

header → Widget?

final, inherited

headerGridDelegate → SliverGridDelegate?

final, inherited

headerItemCount → int?

final, inherited

headerPadding → EdgeInsetsGeometry?

final, inherited

isCustomChildWhenDragging → bool

final, inherited

isCustomFeedback → bool

final, inherited

isStickyHeader → bool

final, inherited

isVertical → bool

final, inherited

itemBuilder → IndexedWidgetBuilder

final, inherited

itemBuilderHeader → IndexedWidgetBuilder?

final, inherited

itemCount → int?

final, inherited

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

keyboardDismissBehavior → ScrollViewKeyboardDismissBehavior

final, inherited

makeRefreshable → Widget

Available on Widget?, provided by the WidgetExtension extension

Make your any widget refreshable with RefreshIndicator on top

no setter

onReorder → ReorderCallback

final, inherited

onReorderHeader → ReorderCallback?

final, inherited

onWillAccept → WillAcceptCallback

final, inherited

onWillAcceptHeader → WillAcceptCallback?

final, inherited

padding → EdgeInsetsGeometry?

final, inherited

physics → ScrollPhysics?

final, inherited

primary → bool?

final, inherited

reverse → bool

final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

semanticChildCount → int?

final, inherited

Methods

center({double? heightFactor, double? widthFactor}) → Widget

Available on Widget?, provided by the WidgetExtension extension

set parent widget in center

cornerRadiusWithClipRRect(double radius) → ClipRRect

Available on Widget?, provided by the WidgetExtension extension

add corner radius

cornerRadiusWithClipRRectOnly({int bottomLeft = 0, int bottomRight = 0, int topLeft = 0, int topRight = 0}) → ClipRRect

Available on Widget?, provided by the WidgetExtension extension

add custom corner radius each side

createElement() → StatefulElement

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

inherited

createState() → MainGridViewState

Creates the mutable state for this widget at a given location in the tree.

inherited

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

expand({dynamic flex = 1}) → Widget

Available on Widget?, provided by the WidgetExtension extension

add Expanded to parent widget

fit({BoxFit? fit, AlignmentGeometry? alignment}) → Widget

Available on Widget?, provided by the WidgetExtension extension

add FittedBox to parent widget

flexible({dynamic flex = 1, FlexFit? fit}) → Widget

Available on Widget?, provided by the WidgetExtension extension

add Flexible to parent widget

launch<T>(BuildContext context, {bool isNewTask = false, PageRouteAnimation? pageRouteAnimation, Duration? duration}) → Future<T?>

Available on Widget?, provided by the WidgetExtension extension

Launch a new screen

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

onTap(Function? function, {BorderRadius? borderRadius, Color? splashColor, Color? hoverColor, Color? highlightColor, Color? focusColor, WidgetStateProperty<Color?>? overlayColor}) → Widget

Available on Widget?, provided by the WidgetExtension extension

add tap to parent widget

opacity({required double opacity, int durationInSecond = 1, Duration? duration}) → Widget

Available on Widget?, provided by the WidgetExtension extension

add opacity to parent widget

paddingAll(double padding) → Padding

Available on Widget?, provided by the WidgetExtension extension

return padding all

paddingBottom(double bottom) → Padding

Available on Widget?, provided by the WidgetExtension extension

return padding bottom

paddingLeft(double left) → Padding

Available on Widget?, provided by the WidgetExtension extension

return padding left

paddingOnly({double top = 0.0, double left = 0.0, double bottom = 0.0, double right = 0.0}) → Padding

Available on Widget?, provided by the WidgetExtension extension

return custom padding from each side

paddingRight(double right) → Padding

Available on Widget?, provided by the WidgetExtension extension

return padding right

paddingSymmetric({double vertical = 0.0, double horizontal = 0.0}) → Padding

Available on Widget?, provided by the WidgetExtension extension

return padding symmetric

paddingTop(double top) → Padding

Available on Widget?, provided by the WidgetExtension extension

return padding top

rotate({required double angle, bool transformHitTests = true, Offset? origin}) → Widget

Available on Widget?, provided by the WidgetExtension extension

add rotation to parent widget

scale({required double scale, Offset? origin, AlignmentGeometry? alignment, bool transformHitTests = true}) → Widget

Available on Widget?, provided by the WidgetExtension extension

add scaling to parent widget

toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode

Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.

inherited

tooltip({required String msg}) → Widget

Available on Widget?, provided by the WidgetExtension extension

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

translate({required Offset offset, bool transformHitTests = true, Key? key}) → Widget

Available on Widget?, provided by the WidgetExtension extension

add translate to parent widget

validate({Widget value = const SizedBox()}) → Widget

Available on Widget?, provided by the WidgetExtension extension

Validate given widget is not null and returns given value if null.

visible(bool visible, {Widget? defaultWidget}) → Widget

Available on Widget?, provided by the WidgetExtension extension

set visibility

withHeight(double height) → SizedBox

Available on Widget?, provided by the WidgetExtension extension

With custom height

withRoundedCorners({Color backgroundColor = whiteColor, BorderRadius borderRadius = const BorderRadius.all(Radius.circular(8.0)), LinearGradient? gradient, BoxBorder? border, List<BoxShadow>? boxShadow, DecorationImage? decorationImage, BoxShape boxShape = BoxShape.rectangle}) → Container

Available on Widget?, provided by the WidgetExtension extension

withScroll({ScrollPhysics? physics, EdgeInsetsGeometry? padding, Axis scrollDirection = Axis.vertical, ScrollController? controller, DragStartBehavior dragStartBehavior = DragStartBehavior.start, bool? primary, required bool reverse}) → Widget

Available on Widget?, provided by the WidgetExtension extension

withShaderMask(List<Color> colors, {BlendMode blendMode = BlendMode.srcATop}) → Widget

Available on Widget?, provided by the WidgetExtension extension

Wrap with ShaderMask widget

withShaderMaskGradient(Gradient gradient, {BlendMode blendMode = BlendMode.srcATop}) → Widget

Available on Widget?, provided by the WidgetExtension extension

Wrap with ShaderMask widget Gradient

withShadow({Color bgColor = whiteColor, Color shadowColor = Colors.black12, dynamic blurRadius = 10.0, dynamic spreadRadius = 0.0, Offset offset = const Offset(0.0, 0.0), LinearGradient? gradient, BoxBorder? border, DecorationImage? decorationImage, BoxShape boxShape = BoxShape.rectangle}) → Container

Available on Widget?, provided by the WidgetExtension extension

withSize({double width = 0.0, double height = 0.0}) → SizedBox

Available on Widget?, provided by the WidgetExtension extension

With custom height and width

withTooltip({required String msg}) → Widget

Available on Widget?, provided by the WidgetExtension extension

Validate given widget is not null and returns given value if null.

withVisibility(bool visible, {Widget? replacement, bool maintainAnimation = false, bool maintainState = false, bool maintainSize = false, bool maintainSemantics = false, bool maintainInteractivity = false}) → Visibility

Available on Widget?, provided by the WidgetExtension extension

set widget visibility

withWidth(double width) → SizedBox

Available on Widget?, provided by the WidgetExtension extension

With custom width

Operators

operator ==(Object other) → bool

The equality operator.

inherited