Review Request: Improve Calculate/Stop buttons when folder Size is being calculated

[Christoph Feck]

> On Aug. 9, 2011, 9:40 a.m., David Faure wrote:
> > What I don't like about a single button, is that it creates a race.
> > 
> > The calculation takes too long, you want to abort it. You click on the button, and half a second before, the calculation actually ended. So your click triggers a "Calculate" again, and the annoying calculation that you wanted to stop, is starting again. It can be stopped a second time of course, but this still makes for an annoying user experience.
> 
> Thomas Lübking wrote:
>     Simple solution: disarm (or just disable) the button for about a second after the calculation has ended, ie. clicking the button leads to no action (should be fine since recalculating after a second has no point?)
>     Ideally the mousebuttonpress event would be eaten but the button doesn't "look" disabled.
>     (click -> click failed -> click again)
>     Just disconnecting from the slot for that timeframe is suboptimal, since the function might appear to be broken (click -> push -> nothing happens?)
>     Setting it disabled serves that functionality but causes visual flicker and raises the question why the button was disabled.
>     
>     You could install  an eventfilter to return true on mousepress/release events on the button and remove it from a timerevent or singleshot timer (just QTimer::singleShot() should be fine as well if you can ensure that you won't run two of them at once)

"Calculating..."
(time goes on)
"Calculation Done"
(clicking has no effect, then about 2 seconds later)
"Refresh"


- Christoph


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On July 30, 2011, 2:51 p.m., Kai Uwe Broulik wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> http://git.reviewboard.kde.org/r/102149/
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> 
> (Updated July 30, 2011, 2:51 p.m.)
> 
> 
> Review request for kdelibs.
> 
> 
> Summary
> -------
> 
> This patch improves the Calculate and Stop buttons in folder properties.
> Instead of having two buttons that are enabled/disabled accordingly, we only have one that toggles (technically there are still two buttons but it looks as if there was one)
> 
> I removed that "Calculating..." label when there is already a size shown, instead the stop button says "Stop Calculating" and somehow serves as "indicator".
> Also, I added a line-break after the "Calculating..." so the label doesn't change its size making the other elements moving around.
> 
> I don't know if the additional icons (view-refresh and process-cancel) add too much clutter to the visual interface since this features is not sooo important/frequently used(?) that the buttons need an icon.
> 
> 
> Diffs
> -----
> 
>   kio/kfile/kpropertiesdialog.cpp ba56f18 
> 
> Diff: http://git.reviewboard.kde.org/r/102149/diff
> 
> 
> Testing
> -------
> 
> Compiles and the buttons toggle (and react) fine.
> 
> 
> Screenshots
> -----------
> 
> Screenshot of the dialog while it is calculating
>   http://git.reviewboard.kde.org/r/102149/s/213/
> 
> 
> Thanks,
> 
> Kai Uwe
> 
>

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