HcDragAndDropView class

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatefulWidget
• HcMainGridView
• HcDragAndDropView

Available Extensions

• HcWidgetExtension

Constructors

HcDragAndDropView({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

HcDragAndDropView.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

HcDragAndDropView.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

HcDragAndDropView.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

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

createElement() → StatefulElement

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

inherited

createState() → HcMainGridViewState

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

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