Hi, I have a requirement of selecting one point in polar plot. Above all, I have done all the steps referred to the example of polar plot. In order to make point in polar plot selectable, I Called
customPlot->setInteractions(QCP::iSelectPlottables);Then connect signal and slot like this
QCPPolarGraph* pgraph = new QCPPolarGraph(polarAxisAngular, polarAxisAngular->radialAxis()); connect(pgraph, static_cast<void(QCPPolarGraph::*)(const QCPDataSelection&)>(&QCPPolarGraph::selectionChanged), [pgraph](const QCPDataSelection& selection){ QSharedPointer<QCPGraphDataContainer> pGraphData = pgraph->data(); QCPDataRange range = selection.dataRange(); });When I test clicking point in QCPPolarGraph, I found that if I only add one data in 270°~360°, it can be selected and trigger slot with a nonempty
selection
. If I add one point additionally in the same pgraph
, the previous point trigger slot with an empty selection
when clicked. This only occurred when the previous point appears in 270°~360°.
Maybe my usage of polar plot is so inelegant, I came up with this idea just because I cannot threat QCPPolarGraph as QCPGraph, signal QCustomPlot::plottableClick not emitted. If there is any solution of what I encountered :) Thanks a lot.
Best regards.
Peggle