Scroll Bars not Working Properly in F22 Applications in KDE

[bitlord]

On Tue, 3 Nov 2015 11:27:00 +1100
Stephen Morris <samorris at netspace.net.au> wrote:

> I have an issue certain applications not displaying the scroll bars 
> properly.
> 
> I am using the upstream Nightly version of Firefox and the upstream 
> Daily version of Thunderbird. Both of these display the vertical
> scroll bar permanently, but neither of them display the top and
> bottom arrows. Another application I have looked at is Gedit which
> only displays the vertical scroll bar when you mouse over it, but it
> doesn't display the top and bottom arrows either. I get these issues
> irrespective of what KDE theme I use.
> Looking at the KDE Settings App it displays the scroll bars with top
> and bottom arrows fine.
> 
> The Kwin script to force window decorations on GTK+ apps is active.
> 
> Does anyone have any ideas why the above mentioned applications don't 
> show the arrows but the KDE Settings Application does show the
> arrows, and whether or not there is anyway to rectify it? From memory
> I did not have this issue in F21 and F22 was installed from scratch
> from the live DVD because the F21->F22 upgrade process does not work
> on my system (the upgrade process wants to run the install from the
> Grub menu and on my system my wireless network is not active at that
> point and cannot be made active because of required drivers).
> 
> regards,
> Steve

About scrollbars, gedit is gtk+ application (gtk+3.x in this case), not
sure about FF and Tbird (nightly builds could use gtk+3.x), Fedora FF
package uses gtk+3 now, so editing theme or changing it can give you
arrows, and about hidden scroll bars it is a new gtk+ feature[1]
(>=3.16), so one way is to change default GTK+ theme, or possible
solution is to export "GTK_OVERLAY_SCROLLING=0". 


[1] https://blogs.gnome.org/mclasen/2014/10/23/an-early-view-of-gtk-3-16/