Review Request 127102: Use fixed width for digital clock applet

[Martin Klapetek]

> On March 15, 2016, 5:48 p.m., Martin Klapetek wrote:
> > applets/digital-clock/package/contents/ui/DigitalClock.qml, lines 565-568
> > <https://git.reviewboard.kde.org/r/127102/diff/3/?file=448492#file448492line565>
> >
> >     Can't we just compare "A" and "P" width's and use that? Would spare creating two Date objects and two calls to Qt.formatTime
> 
> Daniel Faust wrote:
>     No, because eg. in german the strings for am and pm are "vorm." and "nachm.".
> 
> Martin Klapetek wrote:
>     Ah, good. Haven't thought of that. Those germans...
>     
>     (on the other hand, I wouldn't expect anyone in Germany to actually not use 24h clock format, but oh well)
>     
>     One other thing - create just a single Date object and then call setHours(13) on it for the second format.
> 
> Daniel Faust wrote:
>     As you wish. But keep in mind that this is not a performance bottleneck.
>     I added some debug outputs to see where setupLabels is called from and it gets called 10 times when initializing the applet, including 3 times in the onCompleted method.
>     Even if it is a little bit off topic, here is the log (indentation was done manually and is somewhat guessed):
>     
>     ```
>     onShowDateChanged
>       timeFormatCorrection
>         onShowSecondsChanged
>           timeFormatCorrection
>             setupLabels
>               00:00:00 NACHM.
>         setupLabels
>           00:00:00 NACHM.
>     
>     onDateFormatChanged
>       setupLabels
>         00:00:00 NACHM.
>     
>     onLastSelectedTimezoneChanged
>       timeFormatCorrection
>         setupLabels
>           00:00:00 NACHM.
>     
>     onDisplayTimezoneAsCodeChanged
>       setupLabels
>         00:00:00 NACHM.
>     
>     onUse24hFormatChanged
>       timeFormatCorrection
>         setupLabels
>           00:00:00
>     
>     onStateChanged
>       setupLabels
>         00:00:00
>     
>     onCompleted
>       onSelectedTimeZonesChanged
>         setupLabels
>           00:00:00
>       dateTimeChanged
>         timeFormatCorrection
>           setupLabels
>             00:00:00
>       timeFormatCorrection
>         setupLabels
>           00:00:00
>     ```

> But keep in mind that this is not a performance bottleneck

I didn't claim it is. But there's no reason to not write
new code in an efficient way ;)

About the call numbers, yes, I'm aware of that. I wanted
to go over the whole applet and fix it, but then I was
assigned a different project and time was lacking.

Patches welcome for that too, of course :)


- Martin


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On March 16, 2016, 4:35 p.m., Daniel Faust wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/127102/
> -----------------------------------------------------------
> 
> (Updated March 16, 2016, 4:35 p.m.)
> 
> 
> Review request for kde-workspace and Plasma.
> 
> 
> Bugs: 347724
>     https://bugs.kde.org/show_bug.cgi?id=347724
> 
> 
> Repository: plasma-workspace
> 
> 
> Description
> -------
> 
> Currently the width of the date label is not fixed but changes depending on the text. This causes the entire applet to change its width (if the time is the widest displayed item). This in turn can cause all other applets in the same panel to move whenever the displayed time changes.
> 
> This patch uses FontMetrics to iterate over all possible time strings (with different width) and chooses the widest of them as reference for the fixed width of the time label.
> 
> This way the width of the applet stays the same (unless the date is displayed and changes). The text remains centered though, which means that it can still move within the applet when the time changes.
> 
> 
> Diffs
> -----
> 
>   applets/digital-clock/package/contents/ui/DigitalClock.qml 95bb071 
> 
> Diff: https://git.reviewboard.kde.org/r/127102/diff/
> 
> 
> Testing
> -------
> 
> Works with horizontal and vertical panel.
> Also displaying different combinations of "seconds", "date" and "timezone" works.
> 
> 
> File Attachments
> ----------------
> 
> 0001-Use-fixed-width-for-digital-clock-applet.patch
>   https://git.reviewboard.kde.org/media/uploaded/files/2016/03/16/81b4a902-1454-4155-9fda-552b8acba1a8__0001-Use-fixed-width-for-digital-clock-applet.patch
> 
> 
> Thanks,
> 
> Daniel Faust
> 
>

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