Loaded updated version of the Qchart.qml file, which appears to have done the trick. The file seems to allow for redrawing the graph when the chart data changes - I think the slowness which has crept into the app may be ultimately responsible.
Loaded updated version of the Qchart.qml file, which appears to have done the trick. The file seems to allow for redrawing the graph when the chart data changes - I think the slowness which has crept into the app may be ultimately responsible.