777610 - Work - Implement scroll indicators for touch scrolling

Status: RESOLVED WORKSFORME

(Firefox for Metro Graveyard :: Browser, defect, P3)

Description

[Jonathan Wilde [:jwilde]]

Rather than having the main dragger track and update the position of xul:box elements, it would be more efficient to just style the normal scrollbars to look like touch scrollbars.

This also allows us to more easily support scroll bars in scrollable frames in the future.

From there, to implement 775718, we need to selectively remove the style when the user is not using touch and hide them when the user is not panning.

Comment 1

[Jonathan Wilde [:jwilde]]

Attachment: wip

Here's the initial WIP patch that I put together for this.  It displays touch-style scrollbars everywhere.

In chrome, it works well and superimposes tiny scrollbars over the scrollable region.  In content, it pushes page contents sideways and isn't overlayed.  It doesn't look terrible, but not great either.

To land this, we'd need to:
- Add support for tracking whether we're in touch or mouse and display this or native scrollbar styling accordingly.
- Support proper overlaying of the scrollbars on content. (Possible solutions in bug 636564.)
- Add CSS transitions to the scrollbar. (Possible solutions in bug 636564.)

Comment 3

[Jim Mathies [:jimm]]

We can't implement this until we can theme anonymous scroll bars.