在 2011年8月15日 Monday 11:36:03，Aaron J. Seigo 写道： > On Sunday, August 14, 2011 06:25:57 Weng Xuetian wrote: > > Hi Plasma World,I have wrote a DataEngine to sync with a very frequently > > updated textsource (say nearly 10 times a second), currently I'm using > > aPlasma.IconWidget to show the text, but I found that the update of > > text cannot catch up the updated speed. > > first, sources in DataEngines are limited to 20 updates per second. but > that's twice as fast as your 10 times / second, so shouldn't be an issue. > > most likely it is simply that the painting is too slow. > > try to do some performance measurements in the code to see where the slow > down is.
emm, you are right, I add print to onDataChanged, and the stdout give the correct result as I want. At last I find that PlasmaWidgets.IconWidget's text update is not fast enough. If I use QML Text, it will works very well. Is there a bug in PlasmaWidgets.IconWidget?
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