strange scroll behavior in windowed viewer

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#2140 strange scroll behavior in windowed viewer

Milestone: None

Status: closed

Owner: nobody

Labels: None

Priority: 1

Updated: 2017-04-18

Created: 2017-04-17

Creator: janneggers

Private: No

Hello,

Recently the scrolling behavior of the windowed viewer has changed such that it is non-functional at the moment. Just to clarify, I mean the viewer that is used when I detach the embedded viewer to a separate window (I do this to allow positioning on a second desktop). This is not the external viewer. The embedded viewer works fine, no problems. But the windowed viewer has a scrollbar that is too short, and when I scroll down (about half a page) it detects the end of file and jumps to the first page. Ergo, the moment I touch the scroll I'm on the first page. When I scroll upwards I can see the pages jumping by erradically.

Also, maybe unrelated, the toolbar buttons on top of the embedded viewer are not there in the windows viewer. I don't remember if that is new, I never use them.

I'm using Mac-OS Sierra 10.12.4 and TexStudio 2.12.4. I use nearly virgin TexStudio settings, all viewer related settings are still the defaults.

Let me know if I can test anything,

Discussion

Jan Sundermeyer - 2017-04-17

works fine here.

have you tried with another pdf ?

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janneggers - 2017-04-18

I've tried many different pdfs.

However, today I've found that the problem is related to the track pad of the macbook. If I use a regular mouse (with wheel), the scrolling works fine both in embedded and the windowed viewer. Funny enough, the (two finger) trackpad scroll works well in the embedded viewer, but it is over sensitive in the windowed viewer. Also, the length of the draggable part of the scroll bar is much longer in the windowed viewer, indicating the document is much shorter (but it isn't). Maybe the trackpad scroll sensitivity scales with this apparent scroll bar length.

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janneggers - 2017-04-18

I've created 2 screenshots of the scroll bar behavior. Looking at it more closely, in the windowed viewer the scroll bar indicator moves the entire scrollbar length for every page. It jumps back to the top when you cross page boundaries. This jump takes a few milliseconds, and if I scroll too fast during this time I can end up on the first page, even when using my mouse wheel.

Last edit: janneggers 2017-04-18

scroll_example_embedded.png

scroll_example_windowed.png

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janneggers - 2017-04-18

I've found the solution, my last post made me realize that it must be related to the continuous viewing feature. If I enable View->Continuous in the windowed viewer then it behaves exactly like the embedded viewer.

I don't know why it was no longer activated, maybe it was my mistake.

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Jan Sundermeyer - 2017-04-18

so, we can close it ?

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janneggers - 2017-04-18

Yes, thank you

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Jan Sundermeyer - 2017-04-18

status: open --> closed

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Jan Sundermeyer - 2017-04-18

no problem

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