Update: 2026-06-21 18:58:05

.dartServer/.analysis-driver/77/772231a8f2f3249cbb913ce20bf53273.unlinked2

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+axisDirection
+controllerphysicsviewportBuilderincrementCalculatorexcludeFromSemanticshitTestBehaviorsemanticChildCountdragStartBehavior
+restorationIdscrollBehaviorclipBehavioraxiscreateStatedebugFillPropertiesmaybeOfof"recommendDeferredLoadingForContext
+ensureVisible
+scrollablepositionupdateShouldNotify	_positionresolvedPhysics_physicsdeltaToScrollOrigin_effectiveScrollControllervsyncdevicePixelRatio_devicePixelRationotificationContextstorageContext_persistedScrollOffset_configuration_fallbackScrollController_mediaQueryGestureSettings_updatePositionrestoreState
+saveOffset	initStatedidChangeDependencies_shouldUpdatePositiondidUpdateWidgetdispose_scrollSemanticsKeysetSemanticsActions_gestureDetectorKey_ignorePointerKey_gestureRecognizers_shouldIgnorePointer_lastCanDrag_lastAxisDirection
+setCanDragsetIgnorePointer_drag_hold_handleDragDown_handleDragStart_handleDragUpdate_handleDragEnd_handleDragCancel_disposeHold_disposeDrag#_targetScrollOffsetForPointerScroll_pointerSignalEventDelta_receivedPointerSignal_handlePointerScroll _handleScrollMetricsNotification_buildChromebuild_performEnsureVisiblestatechild	registrar_selectionDelegate_kDefaultDragTargetSize%_kDefaultSelectToScrollVelocityScalar
+_autoScroller_scheduledLayoutChange _currentDragStartRelatedToOrigin_currentDragEndRelatedToOrigin_selectionStartsInScrollable_scheduleLayoutChange!_selectableStartEdgeUpdateRecords_selectableEndEdgeUpdateRecordsdidChangeSelectableshandleClearSelectionhandleSelectionEdgeUpdate_inferPositionRelatedToOrigin"_updateDragLocationsFromGeometrieshandleSelectAllhandleSelectWordhandleGranularlyExtendSelection"handleDirectionallyExtendSelection_jumpToEdge_globalPositionInScrollable_dragTargetFromEventdispatchSelectionEventToChildensureChildUpdatedallowImplicitScrollingcreateRenderObjectupdateRenderObject_allowImplicitScrolling_semanticChildCount_onScrollToOffsetdescribeSemanticsConfiguration
+_innerNodeassembleSemanticsNodeclearSemanticscreateDefaultValuedidUpdateValuefromPrimitivestoPrimitivesenablednone
+weightedEventweightedContinuousfreediagonalDragBehaviorhorizontalDetailsverticalDetails_verticalFallbackController_horizontalFallbackController_verticalOuterScrollableKey_horizontalInnerScrollableKeyverticalScrollablehorizontalScrollabletwoDimensionalScrollable
+horizontalKey
+lockedAxislastDragOffset_evaluateLockedAxisverticalOuterKeyViewportBuilderTwoDimensionalViewportBuilder_EnsureVisibleResults
+Scrollable_ScrollableScopeScrollableState_ScrollableSelectionHandler _ScrollableSelectionHandlerState%_ScrollableSelectionContainerDelegate_getDeltaToScrollOrigin_ScrollSemantics_RenderScrollSemantics_RestorableScrollOffsetDiagonalDragBehaviorTwoDimensionalScrollableTwoDimensionalScrollableState_TwoDimensionalScrollableScope_VerticalOuterDimension_VerticalOuterDimensionState_HorizontalInnerDimension_HorizontalInnerDimensionState<74>Ÿ	ToleranceWidgetBuildContextViewportOffsetListFuturevoidViewportListViewGridViewCustomScrollViewof
+ensureVisibleSingleChildScrollViewShrinkWrappingViewportScrollControllerScrollPositionPageViewPageControllerPageStoragekeepScrollOffsetPageStorageKeykey
+ScrollViewScrollNotificationNotificationListenerStatefulWidget
+AxisDirectiondownDragStartBehaviorstartCliphardEdgeHitTestBehavioropaque
+axisDirectionrightinitialScrollOffsetoffset	animateToScrollConfigurationScrollBehaviorscrollBehavior
+ScrollPhysicsphysicsAlwaysScrollableScrollPhysicsScrollActionScrollIncrementTypepagelineScrollIncrementCalculatorGestureDetectorexcludeFromSemanticsbool	separatedSemanticsConfigurationscrollChildCountintDragGestureRecognizerdragStartBehaviorRestorationBucketRestorationScopeRestorationManagerString	ScrollbarScrollableDetailsclipBehaviorAxisaxisDirectionToAxisoverrideDiagnosticPropertiesBuilderdebugFillPropertiesaddEnumPropertyDiagnosticsPropertyStringPropertyInheritedElement'getElementForInheritedWidgetOfExactTypewidget
+scrollabledependOnInheritedElementcontextmaybeOfaxisFlutterError	fromPartsDiagnosticsNodeErrorSummaryErrorDescription	ErrorHintrecommendDeferredLoadingactivityScrollActivityvelocitygetInheritedWidgetOfExactTypepositiondoubleDurationzeroCurveCurveseaseScrollPositionAlignmentPolicyexplicitRenderObject_performEnsureVisiblefindRenderObject	alignmentdurationcurvealignmentPolicytargetRenderObjectaddAllisEmptyvaluelengthsinglewaitthenInheritedWidgetStateTickerProviderStateMixinRestorationMixin
+ScrollContextcreateScrollPositionOffsetEdgeDraggingAutoScrolleruppixelsleft
+controllerTickerProvidercurrentContext
+restorationIdDeviceGestureSettingsgetScrollPhysicsapplyTodetachscheduleMicrotaskdisposeattach	protectedregisterForRestoration
+restoreOffsetinitialRestore!debugIsSerializableForRestorationServicesBindinginstancerestorationManager	flushData	initState
+MediaQuerymaybeGestureSettingsOfmaybeDevicePixelRatioOfViewdevicePixelRatiodidChangeDependenciesshouldNotifyruntimeTypeparentdidUpdateWidget	GlobalKeySetSemanticsActioncurrentStatereplaceSemanticsActionsRawGestureDetectorStateMapTypeGestureRecognizerFactoryverticalVerticalDragGestureRecognizer$GestureRecognizerFactoryWithHandlerssupportedDevicesdragDevicesonDownonStartonUpdateonEndonCancelminFlingDistanceminFlingVelocitymaxFlingVelocityvelocityTrackerBuildermultitouchDragStrategygetMultitouchDragStrategygestureSettings
+horizontalHorizontalDragGestureRecognizerreplaceGestureRecognizersRenderIgnorePointerignoringDragScrollHoldControllerDragDownDetailsholdDragStartDetailsdragDragUpdateDetailsupdateDragEndDetailsendcancelminmaxminScrollExtentmaxScrollExtentPointerScrollEventLogicalKeyboardKeyHardwareKeyboardlogicalKeysPressedanypointerAxisModifierscontainskindPointerDeviceKindmouseflipAxisscrollDeltadxdyaxisDirectionIsReversedPointerSignalEventshouldAcceptUserOffsetrespondallowPlatformDefaultGestureBindingpointerSignalResolverregisterPointerScrollInertiaCancelEvent
+pointerScrollPointerEventScrollMetricsNotificationdepthmarkNeedsSemanticsUpdate	directiondecorationClipBehaviorbuildScrollbarbuildOverscrollIndicatorchildListeneronPointerSignalRawGestureDetectorgesturesbehaviorhitTestBehavior	SemanticsexplicitChildNodes
+IgnorePointerviewportBuilderonNotificationallowImplicitScrollingsemanticChildCountSelectionRegistrarSelectionContainerstate	registrardelegate)MultiSelectableSelectionContainerDelegatevelocityScalaraddListenerremoveListenerSchedulerBindingaddPostFrameCallbacklayoutDidChange
+debugLabelSelectionEdgeUpdateEvent
+SelectableselectablestoSetremoveWheredidChangeSelectablesSelectionResultClearSelectionEventclearhandleClearSelectionglobalPositiontypeSelectionEventType
+endEdgeUpdate	translateforEndgranularityforStarthandleSelectionEdgeUpdatependingstopAutoScrollstartAutoScrollIfNecessary	scrolling	RenderBox
+globalToLocal
+localToGlobalsizeheightwidthinfiniteMatrix4getTransformTocurrentSelectionStartIndexforceUpdateStartSelectionGeometryhasSelectionSelectionPointstartSelectionPointMatrixUtilstransformPoint
+localPosition
+lineHeightcurrentSelectionEndIndexforceUpdateEndendSelectionPointSelectAllSelectionEventhandleSelectAllSelectWordSelectionEventhandleSelectWordGranularlyExtendSelectionEventhandleGranularlyExtendSelectionisEnd!DirectionallyExtendSelectionEvent"handleDirectionallyExtendSelectionRectfromLTRB
+edgeBottombottomedgeToptopjumpTofromLTWH
+fromCentercenterSelectionEventstartEdgeUpdategranularlyExtendSelectiondirectionallyExtendSelectionremove	selectAll
+selectWordselectParagraphdispatchSelectionEventToChildabsprecisionErrorTolerancedispatchSelectionEvent
+SemanticsNodeRenderViewportexcludeFromScrollingRenderAbstractViewportuseTwoPaneSemanticsdescribeSemanticsConfigurationSingleChildRenderObjectWidgetRenderProxyBoxisSemanticBoundaryhaveDimensionshasImplicitScrollingscrollPositionscrollExtentMaxscrollExtentMinonScrollToOffsetIterablefirstisTaggedassembleSemanticsNodeshowOnScreenrectflagsCollectionisHidden
+indexInParentscrollIndex
+updateWithconfigchildrenInInversePaintOrderclearSemanticsRestorableValuenotifyListenersObject
+kTouchSlopTwoDimensionalViewportTwoDimensionalScrollViewnoneverticalScrollablehorizontalScrollable"dependOnInheritedWidgetOfExactTypetwoDimensionalScrollable
+ScrollMetricsverticalDetailshorizontalDetails
+horizontalKeyincrementCalculatordiagonalDragBehaviorverticalOuterKeyverticalOffsethorizontalOffset
+weightedEventweightedContinuousfree_handleDragDown_handleDragStartsourceTimeStampdeltaprimaryDelta_handleDragUpdatepixelsPerSecondVelocityprimaryVelocity_handleDragEnd_handleDragCancel
+setCanDrag_gestureRecognizersPanGestureRecognizer_configuration_physics_mediaQueryGestureSettings_lastCanDrag_lastAxisDirection_gestureDetectorKey_effectiveScrollControllerStatefulWidgetInheritedWidgetStateTickerProviderStateMixinRestorationMixin
+ScrollContext)MultiSelectableSelectionContainerDelegateSingleChildRenderObjectWidgetRenderProxyBoxRestorableValue
+ScrollableScrollableStateO<>›î™}¶¼’`¹ü!¹

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package:flutter/physics.dart‚0

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package:flutter/gestures.dart‚´
package:flutter/rendering.dart‚Ý
package:flutter/scheduler.dartƒ
package:flutter/services.dartƒ/

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ticker_provider.dart…B
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+/// @docImport 'page_view.dart';
+/// @docImport 'scroll_metrics.dart';
+/// @docImport 'scroll_notification.dart';
+/// @docImport 'scroll_view.dart';
+/// @docImport 'single_child_scroll_view.dart';
+/// @docImport 'two_dimensional_scroll_view.dart';
+/// @docImport 'two_dimensional_viewport.dart';‚/‚D
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+/// The direction in which this widget scrolls.
+///
+/// For example, if the [Scrollable.axisDirection] is [AxisDirection.down],
+/// increasing the scroll position will cause content below the bottom of the
+/// viewport to become visible through the viewport. Similarly, if the
+/// axisDirection is [AxisDirection.right], increasing the scroll position
+/// will cause content beyond the right edge of the viewport to become visible
+/// through the viewport.
+///
+/// Defaults to [AxisDirection.down].
+/// {@endtemplate}›Þ˜ƒá
›Þƒ–/// {@template flutter.widgets.Scrollable.controller}
+/// An object that can be used to control the position to which this widget is
+/// scrolled.
+///
+/// A [ScrollController] serves several purposes. It can be used to control
+/// the initial scroll position (see [ScrollController.initialScrollOffset]).
+/// It can be used to control whether the scroll view should automatically
+/// save and restore its scroll position in the [PageStorage] (see
+/// [ScrollController.keepScrollOffset]). It can be used to read the current
+/// scroll position (see [ScrollController.offset]), or change it (see
+/// [ScrollController.animateTo]).
+///
+/// If null, a [ScrollController] will be created internally by [Scrollable]
+/// in order to create and manage the [ScrollPosition].
+///
+/// See also:
+///
+///  * [Scrollable.ensureVisible], which animates the scroll position to
+///    reveal a given [BuildContext].
+/// {@endtemplate}¡H›í…b
¡H…/// {@template flutter.widgets.Scrollable.physics}
+/// How the widgets should respond to user input.
+///
+/// For example, determines how the widget continues to animate after the
+/// user stops dragging the scroll view.
+///
+/// Defaults to matching platform conventions via the physics provided from
+/// the ambient [ScrollConfiguration].
+///
+/// If an explicit [ScrollBehavior] is provided to
+/// [Scrollable.scrollBehavior], the [ScrollPhysics] provided by that behavior
+/// will take precedence after [Scrollable.physics].
+///
+/// The physics can be changed dynamically, but new physics will only take
+/// effect if the _class_ of the provided object changes. Merely constructing
+/// a new instance with a different configuration is insufficient to cause the
+/// physics to be reapplied. (This is because the final object used is
+/// generated dynamically, which can be relatively expensive, and it would be
+/// inefficient to speculatively create this object each frame to see if the
+/// physics should be updated.)
+///
+/// See also:
+///
+///  * [AlwaysScrollableScrollPhysics], which can be used to indicate that the
+///    scrollable should react to scroll requests (and possible overscroll)
+///    even if the scrollable's contents fit without scrolling being necessary.
+/// {@endtemplate}£F¡T‚

£F<C2A3>Ç/// Builds the viewport through which the scrollable content is displayed.
+///
+/// A typical viewport uses the given [ViewportOffset] to determine which part
+/// of its content is actually visible through the viewport.
+///
+/// See also:
+///
+///  * [Viewport], which is a viewport that displays a list of slivers.
+///  * [ShrinkWrappingViewport], which is a viewport that displays a list of
+///    slivers and sizes itself based on the size of the slivers.¦£Z‚Ø
¦‚‰/// {@template flutter.widgets.Scrollable.incrementCalculator}
+/// An optional function that will be called to calculate the distance to
+/// scroll when the scrollable is asked to scroll via the keyboard using a
+/// [ScrollAction].
+///
+/// If not supplied, the [Scrollable] will scroll a default amount when a
+/// keyboard navigation key is pressed (e.g. pageUp/pageDown, control-upArrow,
+/// etc.), or otherwise invoked by a [ScrollAction].
+///
+/// If [incrementCalculator] is null, the default for
+/// [ScrollIncrementType.page] is 80% of the size of the scroll window, and
+/// for [ScrollIncrementType.line], 50 logical pixels.
+/// {@endtemplate}¨p¦7‚M
¨p‚/// {@template flutter.widgets.scrollable.excludeFromSemantics}
+/// Whether the scroll actions introduced by this [Scrollable] are exposed
+/// in the semantics tree.
+///
+/// Text fields with an overflow are usually scrollable to make sure that the
+/// user can get to the beginning/end of the entered text. However, these
+/// scrolling actions are generally not exposed to the semantics layer.
+/// {@endtemplate}
+///
+/// See also:
+///
+///  * [GestureDetector.excludeFromSemantics], which is used to accomplish the
+///    exclusion.ª*¨‰<C2A8>°
ª*<2A>v/// {@template flutter.widgets.scrollable.hitTestBehavior}
+/// Defines the behavior of gesture detector used in this [Scrollable].
+///
+/// This defaults to [HitTestBehavior.opaque] which means it prevents targets
+/// behind this [Scrollable] from receiving events.
+/// {@endtemplate}
+///
+/// See also:
+///
+///  * [HitTestBehavior], for an explanation on different behaviors.­$ª>‚ø
­$‚¼/// The number of children that will contribute semantic information.
+///
+/// The value will be null if the number of children is unknown or unbounded.
+///
+/// Some subtypes of [ScrollView] can infer this value automatically. For
+/// example [ListView] will use the number of widgets in the child list,
+/// while the [ListView.separated] constructor will use half that amount.
+///
+/// For [CustomScrollView] and other types which do not receive a builder
+/// or list of widgets, the child count must be explicitly provided.
+///
+/// See also:
+///
+///  * [CustomScrollView], for an explanation of scroll semantics.
+///  * [SemanticsConfiguration.scrollChildCount], the corresponding semantics property.°ð­’ƒo
°ðƒ/// {@template flutter.widgets.scrollable.dragStartBehavior}
+/// Determines the way that drag start behavior is handled.
+///
+/// If set to [DragStartBehavior.start], scrolling drag behavior will
+/// begin at the position where the drag gesture won the arena. If set to
+/// [DragStartBehavior.down] it will begin at the position where a down
+/// event is first detected.
+///
+/// In general, setting this to [DragStartBehavior.start] will make drag
+/// animation smoother and setting it to [DragStartBehavior.down] will make
+/// drag behavior feel slightly more reactive.
+///
+/// By default, the drag start behavior is [DragStartBehavior.start].
+///
+/// See also:
+///
+///  * [DragGestureRecognizer.dragStartBehavior], which gives an example for
+///    the different behaviors.
+///
+/// {@endtemplate}³\±‚c
³\‚+/// {@template flutter.widgets.scrollable.restorationId}
+/// Restoration ID to save and restore the scroll offset of the scrollable.
+///
+/// If a restoration id is provided, the scrollable will persist its current
+/// scroll offset and restore it during state restoration.
+///
+/// The scroll offset is persisted in a [RestorationBucket] claimed from
+/// the surrounding [RestorationScope] using the provided restoration ID.
+///
+/// See also:
+///
+///  * [RestorationManager], which explains how state restoration works in
+///    Flutter.
+/// {@endtemplate}µ§³n‚G
µ§‚/// {@template flutter.widgets.scrollable.scrollBehavior}
+/// A [ScrollBehavior] that will be applied to this widget individually.
+///
+/// Defaults to null, wherein the inherited [ScrollBehavior] is copied and
+/// modified to alter the viewport decoration, like [Scrollbar]s.
+///
+/// [ScrollBehavior]s also provide [ScrollPhysics]. If an explicit
+/// [ScrollPhysics] is provided in [physics], it will take precedence,
+/// followed by [scrollBehavior], and then the inherited ancestor
+/// [ScrollBehavior].
+/// {@endtemplate}ᵼ<C2B5>m
·<1B>G/// {@macro flutter.material.Material.clipBehavior}
+///
+/// Defaults to [Clip.hardEdge].
+///
+/// This is passed to decorators in [ScrollableDetails], and does not directly affect
+/// clipping of the [Scrollable]. This reflects the same [Clip] that is provided
+/// to [ScrollView.clipBehavior] and is supplied to the [Viewport].
·,·,€—
·˜\/// The axis along which the scroll view scrolls.
+///
+/// Determined by the [axisDirection].·Ç·È·Ç·Ç?
·ã
¸/¸/&
¸K¸
+¸¸
+¸
+<EFBFBD>^
¸½ó½ó
¾¾
+¾
+
+
¾¹l¹l‡v
½ë„0/// The state from the closest instance of this class that encloses the given
+/// context, or null if none is found.
+///
+/// Typical usage is as follows:
+///
+/// ```dart
+/// ScrollableState? scrollable = Scrollable.maybeOf(context);
+/// ```
+///
+/// Calling this method will create a dependency on the [ScrollableState]
+/// that is returned, if there is one. This is typically the closest
+/// [Scrollable], but may be a more distant ancestor if [axis] is used to
+/// target a specific [Scrollable].
+///
+/// Using the optional [Axis] is useful when Scrollables are nested and the
+/// target [Scrollable] is not the closest instance. When [axis] is provided,
+/// the nearest enclosing [ScrollableState] in that [Axis] is returned, or
+/// null if there is none.
+///
+/// This finds the nearest _ancestor_ [Scrollable] of the `context`. This
+/// means that if the `context` is that of a [Scrollable], it will _not_ find
+/// _that_ [Scrollable].
+///
+/// See also:
+///
+/// * [Scrollable.of], which is similar to this method, but asserts
+///   if no [Scrollable] ancestor is found.ÀE½ÀE½
ÀEÊÀEÔÀEÔ
+
ÀEÚÀ@æÀ@æ‰,
ÀEº„‚/// The state from the closest instance of this class that encloses the given
+/// context.
+///
+/// Typical usage is as follows:
+///
+/// ```dart
+/// ScrollableState scrollable = Scrollable.of(context);
+/// ```
+///
+/// Calling this method will create a dependency on the [ScrollableState]
+/// that is returned, if there is one. This is typically the closest
+/// [Scrollable], but may be a more distant ancestor if [axis] is used to
+/// target a specific [Scrollable].
+///
+/// Using the optional [Axis] is useful when Scrollables are nested and the
+/// target [Scrollable] is not the closest instance. When [axis] is provided,
+/// the nearest enclosing [ScrollableState] in that [Axis] is returned.
+///
+/// This finds the nearest _ancestor_ [Scrollable] of the `context`. This
+/// means that if the `context` is that of a [Scrollable], it will _not_ find
+/// _that_ [Scrollable].
+///
+/// If no [Scrollable] ancestor is found, then this method will assert in
+/// debug mode, and throw an exception in release mode.
+///
+/// See also:
+///
+/// * [Scrollable.maybeOf], which is similar to this method, but returns null
+///   if no [Scrollable] ancestor is found.ÀN/ÀN/
ÀN<ÀNFÀNF
+
ÀNLÀJÀJ…ê
ÀNƒÅ/// Provides a heuristic to determine if expensive frame-bound tasks should be
+/// deferred for the [context] at a specific point in time.
+///
+/// Calling this method does _not_ create a dependency on any other widget.
+/// This also means that the value returned is only good for the point in time
+/// when it is called, and callers will not get updated if the value changes.
+///
+/// The heuristic used is determined by the [physics] of this [Scrollable]
+/// via [ScrollPhysics.recommendDeferredLoading]. That method is called with
+/// the current [ScrollPosition.activity]'s [ScrollActivity.velocity].
+///
+/// The optional [Axis] allows targeting of a specific [Scrollable] of that
+/// axis, useful when Scrollables are nested. When [axis] is provided,
+/// [ScrollPosition.recommendDeferredLoading] is called for the nearest
+/// [Scrollable] in that [Axis].
+///
+/// If there is no [Scrollable] in the widget tree above the [context], this
+/// method returns false.ÀQRÀQR
ÀQ_ÀQnÀQn
ÀQuÀQŠÀQŠ!
ÀQ“ÀQ±ÀQ±
ÀQ·ÀQÐÀQÐV
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+ÀQ<>ÀQžÀQ¦ÀQ§ÀQ¿ÀQÅÀQÆÀRÀRÀRÀPÀP‡m
ÀQ?<3F>/// Scrolls all scrollables that enclose the given context so as to make the
+/// given context visible.
+///
+/// If a [Scrollable] enclosing the provided [BuildContext] is a
+/// [TwoDimensionalScrollable], both vertical and horizontal axes will ensure
+/// the target is made visible.‰‰ÀNk
“:Š+/// A widget that manages scrolling in one dimension and informs the [Viewport]
+/// through which the content is viewed.
+///
+/// [Scrollable] implements the interaction model for a scrollable widget,
+/// including gesture recognition, but does not have an opinion about how the
+/// viewport, which actually displays the children, is constructed.
+///
+/// It's rare to construct a [Scrollable] directly. Instead, consider [ListView]
+/// or [GridView], which combine scrolling, viewporting, and a layout model. To
+/// combine layout models (or to use a custom layout mode), consider using
+/// [CustomScrollView].
+///
+/// The static [Scrollable.of] and [Scrollable.ensureVisible] functions are
+/// often used to interact with the [Scrollable] widget inside a [ListView] or
+/// a [GridView].
+///
+/// To further customize scrolling behavior with a [Scrollable]:
+///
+/// 1. You can provide a [viewportBuilder] to customize the child model. For
+///    example, [SingleChildScrollView] uses a viewport that displays a single
+///    box child whereas [CustomScrollView] uses a [Viewport] or a
+///    [ShrinkWrappingViewport], both of which display a list of slivers.
+///
+/// 2. You can provide a custom [ScrollController] that creates a custom
+///    [ScrollPosition] subclass. For example, [PageView] uses a
+///    [PageController], which creates a page-oriented scroll position subclass
+///    that keeps the same page visible when the [Scrollable] resizes.
+///
+/// ## Persisting the scroll position during a session
+///
+/// Scrollables attempt to persist their scroll position using [PageStorage].
+/// This can be disabled by setting [ScrollController.keepScrollOffset] to false
+/// on the [controller]. If it is enabled, using a [PageStorageKey] for the
+/// [key] of this widget (or one of its ancestors, e.g. a [ScrollView]) is
+/// recommended to help disambiguate different [Scrollable]s from each other.
+///
+/// See also:
+///
+///  * [ListView], which is a commonly used [ScrollView] that displays a
+///    scrolling, linear list of child widgets.
+///  * [PageView], which is a scrolling list of child widgets that are each the
+///    size of the viewport.
+///  * [GridView], which is a [ScrollView] that displays a scrolling, 2D array
+///    of child widgets.
+///  * [CustomScrollView], which is a [ScrollView] that creates custom scroll
+///    effects using slivers.
+///  * [SingleChildScrollView], which is a scrollable widget that has a single
+///    child.
+///  * [ScrollNotification] and [NotificationListener], which can be used to watch
+///    the scroll position without using a [ScrollController].

ÀX@
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+À]À]
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Àv@ÀvùÀwÀw ÀvÿÀwÀwÀwÀvÝÀv¹h
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+À[¥À[¥<>]
À\ë<>(/// The manager for this [Scrollable] widget's viewport position.
+///
+/// To control what kind of [ScrollPosition] is created for a [Scrollable],
+/// provide it with custom [ScrollController] that creates the appropriate
+/// [ScrollPosition] in its [ScrollController.createScrollPosition] method.À]#À]#l
À]s:/// The resolved [ScrollPhysics] of the [ScrollableState].À]®À]®‚7
À^Ø<>/// An [Offset] that represents the absolute distance from the origin, or 0,
+/// of the [ScrollPosition] expressed in the associated [Axis].
+///
+/// Used by [EdgeDraggingAutoScroller] to progress the position forward when a
+/// drag gesture reaches the edge of the [Viewport].À_éÀ_éi
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À[<18>Ä/// State object for a [Scrollable] widget.
+///
+/// To manipulate a [Scrollable] widget's scroll position, use the object
+/// obtained from the [position] property.
+///
+/// To be informed of when a [Scrollable] widget is scrolling, use a
+/// [NotificationListener] to listen for [ScrollNotification] notifications.
+///
+/// This class is not intended to be subclassed. To specialize the behavior of a
+/// [Scrollable], provide it with a [ScrollPhysics].

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À©Þ€µ/// A widget to handle selection for a scrollable.
+///
+/// This widget registers itself to the [registrar] and uses
+/// [SelectionContainer] to collect selectables from its subtree.
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Àºíƒ@/// Stores the scroll offset when a scrollable receives the last
+/// [SelectionEdgeUpdateEvent].
+///
+/// The stored scroll offset may be null if a scrollable never receives a
+/// [SelectionEdgeUpdateEvent].
+///
+/// When a new [SelectionEdgeUpdateEvent] is dispatched to a selectable, this
+/// updater checks the current scroll offset against the one stored in these
+/// records. If the scroll offset is different, it synthesizes an opposite
+/// [SelectionEdgeUpdateEvent] and dispatches the event before dispatching the
+/// new event.
+///
+/// For example, if a selectable receives an end [SelectionEdgeUpdateEvent]
+/// and its scroll offset in the records is different from the current value,
+/// it synthesizes a start [SelectionEdgeUpdateEvent] and dispatches it before
+/// dispatching the original end [SelectionEdgeUpdateEvent].À»À»€À»kÀ»~À»lÀ»xÀ»IÀ»+V
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ÀÊË<C38A>~/// Infers the [_currentDragStartRelatedToOrigin] and
+/// [_currentDragEndRelatedToOrigin] from the geometry.
+///
+/// This method is called after a select word and select all event where the
+/// selection is triggered by none drag events. The
+/// [_currentDragStartRelatedToOrigin] and [_currentDragEndRelatedToOrigin]
+/// are essential to handle future [SelectionEdgeUpdateEvent]s.
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+/// it optimizes toward scrolling updates.
+///
+/// It keeps track of the drag start offset relative to scroll origin for every
+/// selectable. The records are used to determine whether the selection is up to
+/// date with the scroll position when it sends the drag update event to a
+/// selectable.

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Àùƒ/// With [_ScrollSemantics] certain child [SemanticsNode]s can be
+/// excluded from the scrollable area for semantics purposes.
+///
+/// Nodes, that are to be excluded, have to be tagged with
+/// [RenderViewport.excludeFromScrolling] and the [RenderAbstractViewport] in
+/// use has to add the [RenderViewport.useTwoPaneSemantics] tag to its
+/// [SemanticsConfiguration] by overriding
+/// [RenderObject.describeSemanticsConfiguration].
+///
+/// If the tag [RenderViewport.useTwoPaneSemantics] is present on the viewport,
+/// two semantics nodes will be used to represent the [Scrollable]: The outer
+/// node will contain all children, that are excluded from scrolling. The inner
+/// node, which is annotated with the scrolling actions, will house the
+/// scrollable children.

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+///
+/// The [horizontalDetails], [verticalDetails], and [viewportBuilder] must not
+/// be null.	À
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+/// in both axes.À
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+///
+/// These [ScrollableDetails] can be used to set the [AxisDirection],
+/// [ScrollController], [ScrollPhysics] and more for the horizontal axis.À
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¬€Å/// The configuration of the vertical [Scrollable].
+///
+/// These [ScrollableDetails] can be used to set the [AxisDirection],
+/// [ScrollController], [ScrollPhysics] and more for the vertical axis.À
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+///
+/// A [TwoDimensionalViewport] uses two given [ViewportOffset]s to determine
+/// which part of its content is actually visible through the viewport.
+///
+/// See also:
+///
+///  * [TwoDimensionalViewport], which is a viewport that displays a span of
+///    widgets in both dimensions.À
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d/// {@macro flutter.widgets.Scrollable.incrementCalculator}
+///
+/// This value applies in both axes.À
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5<>/// {@macro flutter.widgets.scrollable.restorationId}
+///
+/// Internally, the [TwoDimensionalScrollable] will introduce a
+/// [RestorationScope] that will be assigned this value. The two [Scrollable]s
+/// within will then be given unique IDs within this scope.À
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+///
+/// This value applies to both axes.À
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+///
+/// This value applies to both axes.À
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+///
+/// This value applies in both axes.À
ÿÀ
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"ë
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`À
`„]
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"ãƒ2/// The state from the closest instance of this class that encloses the given
+/// context, or null if none is found.
+///
+/// Typical usage is as follows:
+///
+/// ```dart
+/// TwoDimensionalScrollableState? scrollable = TwoDimensionalScrollable.maybeOf(context);
+/// ```
+///
+/// Calling this method will create a dependency on the closest
+/// [TwoDimensionalScrollable] in the [context]. The internal [Scrollable]s
+/// can be accessed through [TwoDimensionalScrollableState.verticalScrollable]
+/// and [TwoDimensionalScrollableState.horizontalScrollable].
+///
+/// Alternatively, [Scrollable.maybeOf] can be used by providing the desired
+/// [Axis] to the `axis` parameter.
+///
+/// See also:
+///
+/// * [TwoDimensionalScrollable.of], which is similar to this method, but
+///   asserts if no [Scrollable] ancestor is found.
À
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'Ѓ¹/// The state from the closest instance of this class that encloses the given
+/// context.
+///
+/// Typical usage is as follows:
+///
+/// ```dart
+/// TwoDimensionalScrollableState scrollable = TwoDimensionalScrollable.of(context);
+/// ```
+///
+/// Calling this method will create a dependency on the closest
+/// [TwoDimensionalScrollable] in the [context]. The internal [Scrollable]s
+/// can be accessed through [TwoDimensionalScrollableState.verticalScrollable]
+/// and [TwoDimensionalScrollableState.horizontalScrollable].
+///
+/// If no [TwoDimensionalScrollable] ancestor is found, then this method will
+/// assert in debug mode, and throw an exception in release mode.
+///
+/// Alternatively, [Scrollable.of] can be used by providing the desired [Axis]
+/// to the `axis` parameter.
+///
+/// See also:
+///
+/// * [TwoDimensionalScrollable.maybeOf], which is similar to this method,
+///   but returns null if no [TwoDimensionalScrollable] ancestor is found.À
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šL
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»ƒ¥/// A widget that manages scrolling in both the vertical and horizontal
+/// dimensions and informs the [TwoDimensionalViewport] through which the
+/// content is viewed.
+///
+/// [TwoDimensionalScrollable] implements the interaction model for a scrollable
+/// widget in both the vertical and horizontal axes, including gesture
+/// recognition, but does not have an opinion about how the
+/// [TwoDimensionalViewport], which actually displays the children, is
+/// constructed.
+///
+/// It's rare to construct a [TwoDimensionalScrollable] directly. Instead,
+/// consider subclassing [TwoDimensionalScrollView], which combines scrolling,
+/// viewporting, and a layout model in both dimensions.
+///
+/// See also:
+///
+///  * [TwoDimensionalScrollView], an abstract base class for displaying a
+///    scrolling array of children in both directions.
+///  * [TwoDimensionalViewport], which can be used to customize the child layout
+///    model.À
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+///
+/// Accessible by calling [TwoDimensionalScrollable.of].
+///
+/// Alternatively, [Scrollable.of] can be used by providing [Axis.vertical]
+/// to the `axis` parameter.À
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+///
+/// Accessible by calling [TwoDimensionalScrollable.of].
+///
+/// Alternatively, [Scrollable.of] can be used by providing [Axis.horizontal]
+/// to the `axis` parameter.À
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+///
+/// To manipulate one of the internal [Scrollable] widget's scroll position, use
+/// the object obtained from the [verticalScrollable] or [horizontalScrollable]
+/// property.
+///
+/// To be informed of when a [TwoDimensionalScrollable] widget is scrolling,
+/// use a [NotificationListener] to listen for [ScrollNotification]s.
+/// Both axes will have the same viewport depth since there is only one
+/// viewport, and so should be differentiated by the [Axis] of the
+/// [ScrollMetrics] provided by the notification.

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+—€¹
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L€¬/// This behavior will not allow for any diagonal scrolling.
+///
+/// Drag gestures in one direction or the other will lock the input axis until
+/// the gesture is released.À
UÀ
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^€þ/// This behavior will only allow diagonal scrolling on a weighted
+/// scale per gesture event.
+///
+/// This means that after initially evaluating the drag gesture, the weighted
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pÀ
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—<>/// This behavior will only allow diagonal scrolling on a weighted
+/// scale that is evaluated throughout a gesture event.
+///
+/// This means that during each update to the drag gesture, the scrolling
+/// axis will be allowed to scroll diagonally if it exceeds the
+/// [kTouchSlop].À
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S/// This behavior allows free movement in any and all directions when
+/// dragging.À
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À

+~`/// Specifies how to configure the [DragGestureRecognizer]s of a
+/// [TwoDimensionalScrollable].

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†To/// Signature used by [Scrollable] to build the viewport through which the
+/// scrollable content is displayed.†§†§<E280A0>-
‡-}/// Signature used by [TwoDimensionalScrollable] to build the viewport through
+/// which the scrollable content is displayed.ˆÀˆÀF
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package:flutter/material.dartۉ

page_storage.dart<00>

page_view.dart<00>'

scroll_metrics.dart<00>M

scroll_notification.dart<00>x

scroll_view.dart<00>›

single_child_scroll_view.dart<00>Ë

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+Scrollable_ScrollableScopeScrollableState_ScrollableSelectionHandler _ScrollableSelectionHandlerState%_ScrollableSelectionContainerDelegate_getDeltaToScrollOrigin_ScrollSemantics_RenderScrollSemantics_RestorableScrollOffsetDiagonalDragBehaviorTwoDimensionalScrollableTwoDimensionalScrollableState_TwoDimensionalScrollableScope_VerticalOuterDimension_VerticalOuterDimensionState_HorizontalInnerDimension_HorizontalInnerDimensionState	(flutter.widgets.Scrollable.axisDirection<6F>ÌThe direction in which this widget scrolls.
+
+For example, if the [Scrollable.axisDirection] is [AxisDirection.down],
+increasing the scroll position will cause content below the bottom of the
+viewport to become visible through the viewport. Similarly, if the
+axisDirection is [AxisDirection.right], increasing the scroll position
+will cause content beyond the right edge of the viewport to become visible
+through the viewport.
+
+Defaults to [AxisDirection.down].%flutter.widgets.Scrollable.controllerƒ	An object that can be used to control the position to which this widget is
+scrolled.
+
+A [ScrollController] serves several purposes. It can be used to control
+the initial scroll position (see [ScrollController.initialScrollOffset]).
+It can be used to control whether the scroll view should automatically
+save and restore its scroll position in the [PageStorage] (see
+[ScrollController.keepScrollOffset]). It can be used to read the current
+scroll position (see [ScrollController.offset]), or change it (see
+[ScrollController.animateTo]).
+