scrollview_observer 1.23.0

A widget for observing data related to the child widgets being displayed in a ScrollView.

1.23.0

• ObserverWidget
  • Make ObserverWidget listenable.

1.22.0

• ObserverWidget
  • Add scrollNotificationPredicate.

1.21.2

• ObserverWidget
  • Fix web support by @Ahmadre in #91.

1.21.1

• ObserverCore
  • Improve the logic of handleListObserve and handleGridObserve.

1.21.0

• ObserverController
  • Add onPrepareScrollToIndex for jumpTo and animateTo.
• NestedScrollUtil
  • Add jumpTo and animateTo methods.

1.20.0

• ObserverController
  • Add observeIntervalForScrolling to set the minimum amount of time to wait for firing observe callback during scrolling.
• ObserverUtils
  • Improve the logic of isDisplayingSliverInViewport method.
• ScrollViewOnceObserveNotificationResult
  • Add observeViewportResultModel.
• ChatScrollObserver
  • Add ChatScrollObserverRefIndexType.
  • Add refIndexType to specify the role of refItemIndex and refItemIndex.
• Slivers
  • Add SliverObserveContext.
• ObserveDisplayingChildModelMixin
  • Add visibleFraction and visibleMainAxisSize.

1.19.1

• ListViewObserver
  • Support SliverVariedExtentList in 74.
• Chat Observer
  • Safely obtain the constraints of RenderSliver.
• ObserverController
  • Adapt to scenes where CustomScrollView specifies center.

1.19.0

• SliverViewObserver
  • Add customOverlap property.
• NestedScrollUtil
  • To better support NestedScrollView.
• ObserverCore
  • Improve the judgment logic of whether the sliver is visible.
• ObserverController
  • Adjust the controller to be modifiable.

1.18.2

• Chat Observer
  • Fix keeping position not working by @LinXunFeng in #64

1.18.1

• Add a check to determine whether the BuildContext is mounted by @LinXunFeng in #62

1.18.0

• ObserverController
  • Add some scrolling task notifications extending from ObserverScrollNotification.
  • The jumpTo method and animateTo method support await.
  • Add isForbidObserveCallback property.
  • Add isForbidObserveViewportCallback property.

1.17.0

• ObserverController
  • The parameter isFixedHeight in the jumpTo method and animateTo method supports GridView and supports ScrollView built by third-party package by @percival888 in #52.

1.16.5

• ObserverWidget
  • Improve the processing logic of scroll notification when scrolling with the mouse wheel is not smooth by @qiangjindong in #48.
• Chat Observer
  • Update isShrinkWrap once during initialization by @LinXunFeng. #47
• ObserverController
  • Fix unable to jump when sliver is too far away and has no any child by @LinXunFeng. #45
  • Fix continuous page turning due to incorrect index by @LinXunFeng.

1.16.4

• Supplement missing type conversion adjustments.

1.16.3

• Observation Model
  • Add viewport property to observation model.
  • Correct the calculation logic of some values to adapt to the scene of multiple slivers.

1.16.2

• ObserverWidget
  • Adjust the conversion type of viewport.offset to ScrollPosition by @LiuDongCai in #41.
• ObserveDisplayingChildModelMixin
  • Adapt displayPercentage to scenes with SliverPersistentHeader by @percival888 in #43.
  • Refine the logic of calculateDisplayPercentage method by @LinXunFeng.

1.16.1

• Compatible with flutter 3.13.0

1.16.0

• ObserverController
  • dispatchOnceObserve method supports directly getting observation result.

1.15.0

• Slivers
  • Add SliverObserveContextToBoxAdapter.

1.14.2

• ObserverWidget
  • Safe to use context. #35.

1.14.1

• Chat Observer
  • Improve the logic of the conversion type.

1.14.0

• Chat Observer
  • Support for keeping position of generative messages (eg: ChatGPT)

1.13.2

• ObserverWidget
  • Fix getting bad observation result on web. Thanks to @rmasarovic for the test in #31

1.13.1

• ObserverCore
  • Fix no getting all child widgets those are displayed when there are separators in ListView. #31
• ObserverUtils
  • Safely call findRenderObject method.

1.13.0

• ObserverUtils
  • The calcAnchorTabIndex method supports GridView.
• ObserverCore
  • Refine the logic of handleListObserve method and handleGridObserve method.

1.12.0

• ObserverWidget
  • Support custom observation object and observation logic.
  • Refine the logic for finding the first sliver in viewport.

1.11.0

• Chat Observer
  • Support inserting multiple messages at once.
• ObserverWidget
  • GridViewObserver is compatible with waterfall flow.
  • SliverViewObserver supports observation of viewport.

1.10.1

• ObserverController
  • fix: targetOffset calculate may be negative by @zeqinjie in #21.

1.10.0

• ObserverController
  • Improve [_calculateTargetLayoutOffset] logic.
  • The jumpTo method and animateTo method both add a parameter [padding].
• ObserverIndexPositionModel
  • Add property [padding].

1.9.2

• ObserverWidget
  • Catch the exception thrown by getting size.

1.9.1

• ObserverController
  • Modify offset calculation logic in method [_calculateTargetLayoutOffset].

1.9.0

• ObserverWidget
  • Add property [autoTriggerObserveTypes] and property [triggerOnObserveType].
• ObserverController
  • Method [dispatchOnceObserve] adds parameter [isForce].

1.8.0

• Scrolling to the specified index location
  • Supports initializing the index position of the scrollView.
  • Deprecated [clearIndexOffsetCache], please use [clearScrollIndexCache] instead.

1.7.0

• Chat Observer
  • Add the property [fixedPositionOffset].
  • Deprecated [ChatObserverClampinScrollPhysics], please use [ChatObserverClampingScrollPhysics] instead.

1.6.2

• Fix lib not working when itemExtent is set in ListView.

1.6.1

• Fix lib not working when shrinkWrap is true in scrollView.

1.6.0

• Chat Observer
  • Add onHandlePositionCallback.

1.5.1

• Fix scrollView being stuck when child widget get [size].

1.5.0

• Chat Observer
  • Quickly implement the chat session page effect.
• Scrolling to the specified index location
  • Add the property [cacheJumpIndexOffset].

1.4.0

• Scrolling to the specified index location
  • New alignment parameter in the jumpTo and animateTo methods.
  • Fixed a bug that caused scrolling to the first child to jitter when using offset parameter.

1.3.0

• Scrolling to the specified index location supports the SliverPersistentHeader.
• Add ObserverUtils
  • Method calcPersistentHeaderExtent: Calculate current extent of RenderSliverPersistentHeader.
  • Method calcAnchorTabIndex: Calculate the anchor tab index.

1.2.0

• The jumpTo and animateTo methods add an isFixedHeight parameter to optimize performance when the child widget is of fixed height
• Add the properties [leadingMarginToViewport] and [trailingMarginToViewport]
• Support mixing usage of SliverList and SliverGrid

1.1.0

• Supports scrolling to the specified index location

1.0.1

• Delete useless code

1.0.0

• Implements a way to use without sliver [BuildContext]
• Change [onObserve] to [onObserveAll], and add a new [onObserve] callback to listen for changes in the child widget display of the first sliver
• Add [ObserverController]

0.1.0

• Support GridView
• Support the horizontal

0.0.1

• Initial release