Arrow up from initial infinite scroll paint does not go up a row · angular-ui/ui-grid#5031

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grid-infinite-scrollhelp wantedtype: bug

Description

When you initially load infinite scroll grid that has more data above, if you are on the first row and arrow up, more data is loaded and you see the scroll thumb move down, but it does not move up a row. you have to subsequently arrow up again to get go up the row.

In this plunker: http://plnkr.co/edit/nhP6CpaL9EJM3orGL41O?p=preview

Click on the first row, first column.
Hit the arrow up key. Note that the scroll thumb moves down indicating that more data loaded, but it did not go up a row. A subsequent pressing of the up arrow key moves you up the row.

Contributor guide

Tech stack: javascript
Domain: frontend
Issue type: bug
Difficulty: 3
Estimated time: half day
Activity status: stale
Clarity: needs investigation
Prerequisites: Understanding of infinite scrollKeyboard event handling
Newbie friendliness: 25
Research direction: Investigate the infinite scroll implementation in ui grid, focusing on the keyboard navigation handler for the arrow up key when the user is at the first row. The issue is that pressing arrow up loads more data but does not move the selection up a row; a second press is needed. Look at the scroll event handling and row focus logic, particularly in files related to grid keyboard navigation and infinite scroll.