[Okular-devel] [Bug 181326] avoid white pages as progress indicators -- flickering

[Maciej Pilichowski]

http://bugs.kde.org/show_bug.cgi?id=181326





--- Comment #6 from Maciej Pilichowski <bluedzins wp pl>  2009-01-19 21:59:42 ---
@Pino,

> > ad.a) I don't understand this assumption, if you zoom out/in page
> > the page "changes" while in fact it does not change
>
> You didn't get me. Zooming of course does not change the page, but
> artificially adding a logo does.

I meant, visually adding. Not changing the image itself.

So in this sense adding logo does the same effect, as zooming.

> > ad.c) white page is an option at all -- it hurt eyes
>
> It is not an option.

Yes, my typo -- it should be: is *not* an...

> > So, suggestions:
> > 1) remove white pages at all.
>
> And what do you do instead?
> Block the user interface because you have nothing to show?
> Show an hole?
> No, rejected.

You said above that showing white pages is not an option. We are talking about
those artificially created objects, not white pages from pdf!

> > 2) provide visual feedback (okular logo) by default with ability
> > to turn it off
>
> I don't want Okular as the paradise of options.
> Rejected.

I forgot, all users are the same.

> > 3.1) in (a) really holds -- use mouse cursor, it is standard way
> > to show "busy, computations"
>
> The point of showing *something* for non-rendered-yet pages is to
> make the user interface active.
> A busy cursor just show some animation and no cursor at all, so it
> gives the false idea the whole UI is frozen.

Not at all, there are two kinds of busy cursor. Besides, changing cursor shape
does not change the UI activity.

> *Every* document reader out there shows white pages while rendering
> them and not blocking the UI, this is a well known behaviour.

Hurray, every other document readers strain the eyes, lets follow the path.

What kind of thinking is that? If everybody makes a mistake, and huge one,
because somebody's health cannot be taken lightly, you are opposing, because it
is better be in the crowd?

@Albert,

> What you are asking is something you don't
> want.

?

> You want okular to be synchronous, that is, do not display a page
> until it's totally rendered, to achieve that simply disable
> background generation in the options and see how much it sucks.

? I don't get it -- I just want to remove the extra page between which was
generated artificially on the fly, which causes flickering effect.

That's all.

Albert, if it would be removed, with no option changed, I would simply see x2
less pages, I would see page A longer, and then page B. Big relief for the
eyes.


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