I set qcustomplot to set the selection data segment for the selection mode and curve graph, but the mouse box selection can only select a certain 1 curve, not multiple curves at the same time? QCustomplot ver is 2.1.1
that is code
ui->plot->setInteractions(QCP::iRangeZoom | QCP::iRangeDrag | QCP::iSelectPlottables | QCP::iSelectItems | QCP::iSelectLegend);
ui->plot->setSelectionRectMode(QCP::SelectionRectMode::srmSelect);
ui->plot->graph(i)->setSelectable(QCP::stDataRange);