[Bug 1688687] Re: Mouse wheel doesn't scroll location bar in Caja any longer

[Vlad Orlov]

[Impact]

Mousewheel scrolling over the pathbar buttons in
Caja does nothing. It should switch between the
buttons in case when not all of them are visible
in the window, for example, when window isn't wide
enough. It worked that way in GTK+2 builds of Caja,
but stopped with migration to GTK+3 (in 1.18).

The patch attached to this report fixes the issue.

The fix is already present in Artful and tested by
developers and users. Would be nice to backport it
to Zesty as well, as it's a regression compared to
previous Caja versions.

[Test Case]

Steps to reproduce:
- launch Caja
- move to some directory 4-5 levels deep (so that
  the pathbar has enough buttons to test)
- reduce width of Caja window to make some pathbar
  buttons disappear
- use mousewheel scroll over any pathbar button

The scroll will do nothing.
To see what it should actually do, use left/right
arrow buttons on the sides of the pathbar.

[Regression Potential]

Between low and none. The patch only affects the
processing of scroll events in the pathbar.

[Other Info]

The patch is included into the debdiff attached to
bug 1680604.

The debdiff contains patches to fix bug 1680604,
bug 1683653, bug 1688687. See other reports for the
corresponding SRU templates.

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https://bugs.launchpad.net/bugs/1688687

Title:
  Mouse wheel doesn't scroll location bar in Caja any longer

Status in caja package in Ubuntu:
  Fix Released
Status in caja source package in Zesty:
  Triaged

Bug description:
  In previous versions of Ubuntu, if the breadcrumbs in the location bar
  in Caja were wider than the window, I could hover over the location
  bar and scroll left to right with the mouse wheel. As of 17.04, this
  no longer works. The mouse wheel doesn't scroll the location bar.

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