Re: plasma data engine / property loop
- Date: Sun, 15 Jan 2017 15:52:23 +0100
- From: Martin Koller <kollix@xxxxxx>
- Subject: Re: plasma data engine / property loop
On Sunday 15 January 2017 12:18:24 Kevin Krammer wrote: > Hi Martin, > > On Sunday, 2017-01-15, 11:59:08, Martin Koller wrote: > > 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 > > Hmm, ok, so setting connectedSources is triggering the newData signal? > > > > 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" > > Does it create any problems during operation? > That "loop" should end after the first roundtrip as maxCpuIndex won't change > anymore. > > If there is a problem or you want to tyr getting rid of the warning, you could > try this > > connectedSources: [ cores ] > onMaxCpuIndexChanged: connectedSources = sources(); > > I.e. initially connectedSources is bound to just "system/cores". > Once the value is retrieved, by onNewData, the change of maxCpuIndex will > trigger a one-time setting if connectedSources to the result of sources(). > connectedSource then has a fixed value, not a binding. yep, thanks. Did it similar to this. I don't like warnings ... -- Best regards/Schöne Grüße Martin A: Because it breaks the logical sequence of discussion Q: Why is top posting bad? () ascii ribbon campaign - against html e-mail /\ - against proprietary attachments Geschenkideen, Accessoires, Kulinarisches: www.lillehus.at
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