Bug 390708

Summary:	Allow to move backward in presentations using touch
Product:	[Applications] okular	Reporter:	Stefan Brüns <stefan.bruens>
Component:	general	Assignee:	Okular developers <okular-devel>
Status:	RESOLVED FIXED
Severity:	normal	CC:	bugseforuns, nate, oliver.sander
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed In:

Description Stefan Brüns 2018-02-19 01:40:55 UTC

Currently, the only possible movement is forward, as a touch is handled as a click.

Possible actions:
- touch on left half - backward, touch on right half - forward
- swipe left/right -forward/backward

Comment 1 Oliver Sander 2018-02-19 06:00:43 UTC

You can go back and forth in presentations using left/right swiping gestures.  Note that Qt swipe gestures need three(!) fingers.

Comment 2 Stefan Brüns 2018-02-19 08:52:13 UTC

(In reply to Oliver Sander from comment #1)
> You can go back and forth in presentations using left/right swiping
> gestures.  Note that Qt swipe gestures need three(!) fingers.

Has no effect for me. The event device reports up to ten fingers.

Comment 3 Oliver Sander 2018-02-19 09:12:03 UTC

We are talking about touch screens, right?  Not about touch pad gestures?

Comment 4 Stefan Brüns 2018-02-19 09:14:11 UTC

(In reply to Oliver Sander from comment #3)
> We are talking about touch screens, right?  Not about touch pad gestures?

Yes, touch screens.

Comment 5 Oliver Sander 2018-02-19 09:21:35 UTC

Hmm.  What's your Okular version?  Does three-finger swiping work for you in other Qt applications?

Are you able to build Okular yourself to do some debugging?

Actually, though, the change-slides-by-swiping code in Okular is extremely short
(method PresentationWidget::gestureEvent, in file presentationwidget.cc:589).  If that doesn't work it is unlikely to be an Okular problem, simply because all the difficult things happen in Qt and below.

Comment 6 Christoph Feck 2018-03-01 03:15:28 UTC

If you can provide the information requested in comment #5, please add it.

Comment 7 Christoph Feck 2018-03-29 14:18:41 UTC

To further investigate this issue, KDE developers need the information requested in comment #5. If you can provide it, or need help with finding that information, please add a comment.

Comment 8 Patrick Silva 2018-04-24 20:15:35 UTC

I use okular 1.4.70 on my laptop with touchscreen running neon dev unstable.

I can go to next page swiping one or two fingers up/down/left/right.
To swipe three fingers up/right goes to next page.
To swipe three fingers down/left goes to previous page.

Comment 9 Nate Graham 2018-05-08 16:48:46 UTC

Thanks for confirming!