Bug 158586 - Web Inspector: difficult to zoom rendering frames timeline using trackpad
Summary: Web Inspector: difficult to zoom rendering frames timeline using trackpad
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Web Inspector (show other bugs)
Version: WebKit Nightly Build
Hardware: All All
: P2 Normal
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2016-06-09 14:39 PDT by Blaze Burg
Modified: 2016-12-13 15:40 PST (History)
2 users (show)

See Also:

Attachments
[MOVIE] jumpy zooming (6.58 MB, video/quicktime)
2016-06-09 14:39 PDT, Blaze Burg 		no flags Details
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Description Blaze Burg 2016-06-09 14:39:04 PDT 
Created attachment 280952 [details]
[MOVIE] jumpy zooming

It should be centered at where the mouse cursor is, but it drifts to the right or left if you are slightly off center. See the video.

I think we need to add or increase the hysteresis to be more up/down left/right than the record-based timelines. This is because those timelines give much faster feedback so you can adjust your trackpad movement easier. By comparison the rendering frames timeline is jumpy.
Comment 1 Radar WebKit Bug Importer 2016-06-09 14:41:10 PDT 
<rdar://problem/26728126>
Comment 2 Timothy Hatcher 2016-06-09 16:34:56 PDT 
I think we have a similar bug with normal timeline zooming getting off from the mouse.