ElDrag class - components library

Constructors

ElDrag({Key? key, HitTestBehavior? behavior, PointerDownEventListener? onPointerDown, VoidCallback? onCancel, ElGestureDragStartCallback? onDragStart, GestureDragUpdateCallback? onDragUpdate, GestureDragEndCallback? onDragEnd, bool? enabledAnimate, Widget? child}): const

Properties

behavior → HitTestBehavior: 命中测试行为，默认：HitTestBehavior.deferToChild，事件命中的三个行为有以下特征：
finalinherited
builder → TransitionBuilder?: finalinherited
child → Widget?: finalinherited
disabled → bool: 是否禁用事件，此属性相当于嵌套一个 IgnorePointer 小部件，它会忽略自身以及后代所有指针事件
finalinherited
enabledAnimate → bool?: final
hashCode → int: The hash code for this object.
no setterinherited
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
onCancel → VoidCallback?: 通用的指针取消事件
finalinherited
onDragEnd → GestureDragEndCallback?: 拖拽结束事件
final
onDragStart → ElGestureDragStartCallback?: 拖拽开始事件，指针第一次移动时立即执行，接收一个 bool 参数作为返回值，如果返回 true，那么当前指针将作为唯一胜利者，忽略所有其他指针，若没有返回 true，那么当前指针会放弃竞争，并且不会执行 onDragUpdate、onDragEnd 回调。
final
onDragUpdate → GestureDragUpdateCallback?: 拖拽更新事件
final
onHover → PointerHoverEventListener?: 原始指针悬停事件
finalinherited
onPointerDown → PointerDownEventListener?: 原始指针按下事件
finalinherited
onPointerMove → PointerMoveEventListener?: 原始指针移动事件
finalinherited
onPointerPanZoomEnd → PointerPanZoomEndEventListener?: finalinherited
onPointerPanZoomStart → PointerPanZoomStartEventListener?: 这三个事件用于监听平移、缩放
finalinherited
onPointerPanZoomUpdate → PointerPanZoomUpdateEventListener?: finalinherited
onPointerSignal → PointerSignalEventListener?: 鼠标滚轮事件
finalinherited
onPointerUp → PointerUpEventListener?: 原始指针抬起事件
finalinherited
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited

Methods

createElement() → RenderObjectElement: RenderObjectWidgets always inflate to a RenderObjectElement subclass.
inherited
createRenderObject(BuildContext context) → RenderObject: Creates an instance of the RenderObject class that this RenderObjectWidget represents, using the configuration described by this RenderObjectWidget.
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
didUnmountRenderObject(covariant RenderObject renderObject) → void: This method is called when a RenderObject that was previously associated with this widget is removed from the render tree. The provided RenderObject will be of the same type as the one created by this widget's createRenderObject method.
inherited
noScrollbarBehavior(BuildContext context, {Key? key, bool? overscroll, bool enabled = true}) → Widget: Available on Widget, provided by the FlutterWidgetExt extension
不使用祖先提供的默认滚动条，当使用自定义滚动条时请添加此扩展方法，防止与祖先提供的默认滚动条重叠
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
updateRenderObject(BuildContext context, covariant RenderObject renderObject) → void: Copies the configuration described by this RenderObjectWidget to the given RenderObject, which will be of the same type as returned by this object's createRenderObject.
inherited

Operators

operator ==(Object other) → bool: The equality operator.
inherited