signalplotter widget in javascript

[Mark]

On Tue, Jul 24, 2012 at 10:39 AM, Kevin Krammer <krammer at kde.org> wrote:
> Hi,
>
> On Friday, 2012-07-20, Kai MX wrote:
>>  Hello,
>>
>>  how can one use the SignalPlotter widget in JavaScript?
>>
>>  In the KDE Techbase
>> (http://techbase.kde.org/Development/Tutorials/Plasma/JavaScript/API-UIEle
>> ments#SignalPlotter) there are only a few properties listed for JavaScript.
>> The important methods like setVerticalRange and addSamples are not listed.
>> (compared to
>> http://api.kde.org/4.x-api/kdelibs-apidocs/plasma/html/classPlasma_1_1Sign
>> alPlotter.html) I do not know how to use this widget without these methods.
>> Which possibilities do I have?
>
> All functions marked with Q_INVOKABLE should also be callable the JavaScript.
> Seems you should be good for addSamples() but you're out of luck for
> setVerticalRange().
>
> Cheers,
> Kevin
> --
> Kevin Krammer, KDE developer, xdg-utils developer
> KDE user support, developer mentoring
>
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>

Perhaps this is of any help.
The SignalPlotter (amongst a bunch of other plasma elements) are
exposed to QML:
http://gitweb.kde.org/index.php?p=kde-runtime.git&a=blob&h=6cc3011319d750cb70c4cb98eb5290bf042c4d78&hb=43ea929fb91f56c1775bbe24d47fd3ce556a25e0&f=plasma%2Fdeclarativeimports%2Fgraphicswidgets%2Fgraphicswidgetsbindingsplugin.cpp

You can use it by importing org.kde.plasma.graphicswidgets

-- just out of my head, not tested --
import org.kde.plasma.graphicswidgets as GraphicsWidgets

GraphicsWidgets.SignalPlotter
{
    ...
}

The properties that you can actually use are a bunch. Take a look
here: http://api.kde.org/4.x-api/kdelibs-apidocs/plasma/html/signalplotter_8h_source.html
Everything that starts with Q_PROPERTY can be called in QML.

Important note, if you can wait till Qt 5 you get the power of HTML 5
canvas in QML which is probably very suited for plotting stuff. But
i'm guessing you can't wait for that and want to have something for
now. hehehe

Good luck,
Mark