[Okular-devel] [Bug 285486] New: Mark last seen line when scrolling one page down

[sphakka]

https://bugs.kde.org/show_bug.cgi?id=285486

           Summary: Mark last seen line when scrolling one page down
           Product: okular
           Version: unspecified
          Platform: Unlisted Binaries
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: wishlist
          Priority: NOR
         Component: general
        AssignedTo: okular-devel at kde.org
        ReportedBy: marcoep at gmail.com


Version:           unspecified (using KDE 4.6.5) 
OS:                Linux

Hello,

When scrolling one page down, it would be nice to have okular overlap and mark
the last seen line in previous page, so that a visual cue is shown where one
stopped reading (the last line in the current view). That would help a lot
especially when the current view holds more than 50% of the entire page, and
hitting PgDown overlaps many lines making it difficult to track the point where
to restart reading.
Let's say I'm reading this:

"-4 blah blah blah,....
 -3 blah blah blah,....
 -2 blah blah blah,....
 -1 blah blah blah,....
 last visible line before PgDown"

and I hit PgDown. Then, in the following view (<50% of the full page content),
I'd like to see a bright mark (highlight or whatever) over the "last visible
line" (underlined in the example):

"-2 blah blah blah,....
 -1 blah blah blah,....
 last visible line before PgDown
 -------------------------------
 first line to restart with
 +1 blah blah blah....
 +2 blah blah blah"

Of course, if the following view has >=50% of the full page content, that would
look like:

 "last visible line before PgDown
 --------------------------------
 first line to restart with
 +1 blah blah blah....
 +2 blah blah blah"

That would let me easily find the line "first line to restart with".
Ideally:
1) the highlight mark colour should be configurable;
2) the mark might fade away after X seconds, though just staying there until
the next scroll event would be enough.

Cheers,

  ^s


Reproducible: Didn't try

Steps to Reproduce:
1) open whatever doc
2) zoom in to let <50% of the page in the current view
3) hit PgDown or scroll by mouse wheel

Actual Results:  
The "first line to restart with" is difficult to find in the following view.

Expected Results:  
The "last visible line before PgDown" as in the example above is highlighted.

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