plasma data engine / property loop

[Martin Koller]

On Sunday 15 January 2017 11:16:22 Kevin Krammer wrote:
> Hi Martin,

Hi Kevin,

> 
> On Sunday, 2017-01-15, 00:04:23, Martin Koller wrote:
> > Hi,
> > 
> > trying to fix the systemload applet (and new to QML), how can one solve the
> > problem: - a data engine delivers the number of CPU cores
> > - depending on this number, I need to separately "connect" to additional
> > sources in this data engine
> > 
> > This creates a property loop.
> > dataSources array depends on cores, but cores is set from dataSources
> 
> How is cores set from dataSources?

As shown below via onNewData

> Does the source() function below write to cores?

no, it reads from it: for (var i = 0; i < cores; i++) ...

I'll just attach the real qml file
The message I see is
SystemLoadViewer.qml:123:5: QML : Binding loop detected for property "connectedSources"


> 
> Cheers,
> Kevin
> 
> > E.g. (pseudo code)
> > 
> > property int cores: 0
> > dataSources: sources()
> > 
> > function sources() { ... create array depending on property "cores", like
> > "cpu/cpu<core index>/nice" ... }
> > 
> > onNewData: { cores = data.value }
> 

-- 
Best regards/Schöne Grüße

Martin
A: Because it breaks the logical sequence of discussion
Q: Why is top posting bad?

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