IGListKit/Source/Internal
Jared Verdi f15b167e85 Interactive Reordering
Summary:
I had a desire for interactive reordering in a personal project, so here's a first attempt at adding support in IGListKit.

I figured I might as well get a WIP PR up for comments before I continue further as there are a few aspects to interactive reordering that don't interplay perfectly with IGListKit.

As discussed in #291, I went after two prime use cases:
1. Moving items amongst a section
2. Rearranging whole sections

I also "disabled" moving items between sections by having those moves revert, to mimic interactive reordering cancellation as closely as possible.

You can see both in the Mixed Data example. Grid items can be moved within a section, while users can be moved to reorder whole sections. But trying to move a grid item out of a grid or a user item into a grid will auto-revert. The revert animation isn't as tight as it should be. It may be more desirable to disable the animation - though you lose the visual cue.

There is a also a new example, `ReorderableViewController`, that demonstrates 2 in its pure form (likely the most desired use case), where all sections are reorderable single rows.

Happy to take feedback -- this is my first experience working on IGListKit, so I would expect there to be gaps. (Ex. I haven't used `IGListStackedSectionController`, and its tests failed as I hadn't implemented reordering delegates for it. Those are simply stubbed out for now.)

Issue fixed: #291

- [x] All tests pass. Demo project builds and runs.
- [x] I added tests, an experiment, or detailed why my change isn't tested.
- [x] I added an entry to the `CHANGELOG.md` for any breaking changes, enhancements, or bug fixes.
- [x] I have reviewed the [contributing guide](https://github.com/Instagram/IGListKit/blob/master/.github/CONTRIBUTING.md)

- [x] Proper support in `IGListStackedSectionController`
Closes https://github.com/Instagram/IGListKit/pull/976

Differential Revision: D6674493

Pulled By: rnystrom

fbshipit-source-id: cd53c5fdc6fb59636edc4747c4bbd0f81a4610e5
2018-02-12 09:27:08 -08:00
..
IGListAdapter+DebugDescription.h Add debug dump scripts 2017-04-21 16:46:06 -07:00
IGListAdapter+DebugDescription.m Update gems, fix warnings, pod install 2017-12-19 09:31:37 -08:00
IGListAdapter+UICollectionView.h Customized post insertion animation 2018-01-29 11:03:11 -08:00
IGListAdapter+UICollectionView.m Interactive Reordering 2018-02-12 09:27:08 -08:00
IGListAdapterInternal.h Interactive Reordering 2018-02-12 09:27:08 -08:00
IGListAdapterProxy.h unintercepted => non-intercepted, close #774 2017-05-25 08:03:36 -07:00
IGListAdapterProxy.m Optimize SEL search efficiency 2018-01-29 20:32:57 -08:00
IGListAdapterUpdater+DebugDescription.h Add debug dump scripts 2017-04-21 16:46:06 -07:00
IGListAdapterUpdater+DebugDescription.m Add debug dump scripts 2017-04-21 16:46:06 -07:00
IGListAdapterUpdaterInternal.h Add debug dump scripts 2017-04-21 16:46:06 -07:00
IGListBatchUpdateData+DebugDescription.h Add debug dump scripts 2017-04-21 16:46:06 -07:00
IGListBatchUpdateData+DebugDescription.m Add debug dump scripts 2017-04-21 16:46:06 -07:00
IGListBatchUpdates.h Update project settings and fix errors 2017-10-26 11:20:55 -07:00
IGListBatchUpdates.m Prevent duplicate item deletes and drop reload collisions 2017-04-19 17:17:41 -07:00
IGListBatchUpdateState.h Track batch updates in object and explicit state 2017-03-07 09:33:03 -08:00
IGListBindingSectionController+DebugDescription.h Added debug dump support to IGListBindingSectionController 2017-08-11 09:19:00 -07:00
IGListBindingSectionController+DebugDescription.m Added debug dump support to IGListBindingSectionController 2017-08-11 09:19:00 -07:00
IGListCollectionViewLayoutInternal.h add integer pixel scaled for frame 2017-03-17 12:33:34 -07:00
IGListDebugger.h Assert duplicate objects and check object types on map lookup 2017-11-30 12:48:07 -08:00
IGListDebugger.m Assert duplicate objects and check object types on map lookup 2017-11-30 12:48:07 -08:00
IGListDebuggingUtilities.h Add debug dump scripts 2017-04-21 16:46:06 -07:00
IGListDebuggingUtilities.m Add debug dump scripts 2017-04-21 16:46:06 -07:00
IGListDisplayHandler.h added experiment to make [IGListAdapter visibleSectionControllers] a bit faster 2017-11-16 16:07:29 -08:00
IGListDisplayHandler.m added experiment to make [IGListAdapter visibleSectionControllers] a bit faster 2017-11-16 16:07:29 -08:00
IGListReloadIndexPath.h Prevent duplicate item deletes and drop reload collisions 2017-04-19 17:17:41 -07:00
IGListReloadIndexPath.m Prevent duplicate item deletes and drop reload collisions 2017-04-19 17:17:41 -07:00
IGListSectionControllerInternal.h Interactive Reordering 2018-02-12 09:27:08 -08:00
IGListSectionMap+DebugDescription.h Add debug dump scripts 2017-04-21 16:46:06 -07:00
IGListSectionMap+DebugDescription.m Added debug dump support to IGListBindingSectionController 2017-08-11 09:19:00 -07:00
IGListSectionMap.h Move section index to property 2017-05-01 07:28:27 -07:00
IGListSectionMap.m Rename sectionIndex API to just section 2017-05-11 14:49:59 -07:00
IGListStackedSectionControllerInternal.h Remove IGListSectionType 2017-04-19 08:26:30 -07:00
IGListWorkingRangeHandler.h Remove IGListSectionType 2017-04-19 08:26:30 -07:00
IGListWorkingRangeHandler.mm Remove IGListSectionType 2017-04-19 08:26:30 -07:00
UICollectionView+DebugDescription.h Add debug dump scripts 2017-04-21 16:46:06 -07:00
UICollectionView+DebugDescription.m Fix format warnings for clang 5.0 2017-09-25 10:34:51 -07:00
UICollectionView+IGListBatchUpdateData.h Initial commit 2016-10-11 10:12:17 -04:00
UICollectionView+IGListBatchUpdateData.m IGListDiffKit 2017-11-06 17:02:06 -08:00
UICollectionViewLayout+InteractiveReordering.h Interactive Reordering 2018-02-12 09:27:08 -08:00
UICollectionViewLayout+InteractiveReordering.m Interactive Reordering 2018-02-12 09:27:08 -08:00
UIScrollView+IGListKit.h Add new iOS 11 api adjustedContentInset support 2017-12-18 08:51:14 -08:00
UIScrollView+IGListKit.m Update gems, fix warnings, pod install 2017-12-19 09:31:37 -08:00