void MainWindow::setupItemTracerTest(QCustomPlot *customPlot)
{
QCPItemTracer *tracer1 = new QCPItemTracer(customPlot);
customPlot->addItem(tracer1);
tracer1->position->setCoords(1, 3);
tracer1->setStyle(QCPItemTracer::tsCircle);
tracer1->setSize(20);
QCPItemTracer *tracer2 = new QCPItemTracer(customPlot);
customPlot->addItem(tracer2);
tracer2->position->setCoords(2, 2.5);
tracer2->setStyle(QCPItemTracer::tsCrosshair);
QCPItemTracer *tracer3 = new QCPItemTracer(customPlot);
customPlot->addItem(tracer3);
tracer3->position->setCoords(3, 2);
tracer3->setStyle(QCPItemTracer::tsPlus);
tracer3->setSize(20);
QCPItemTracer *tracer4 = new QCPItemTracer(customPlot);
customPlot->addItem(tracer4);
tracer4->position->setCoords(4, 1.5);
tracer4->setStyle(QCPItemTracer::tsSquare);
tracer4->setSize(20);
QCPGraph *graph = customPlot->addGraph();
int n = 20;
QVector<double> x(n), y(n);
for (int i=0; i<n; ++i)
{
x[i] = 0.5+i/(double)n*4;
y[i] = qSin(x[i])+1.5;
}
graph->setData(x, y);
QCPItemTracer *graphTracer = new QCPItemTracer(customPlot);
customPlot->addItem(graphTracer);
graphTracer->setGraph(graph);
graphTracer->setGraphKey(2.3);
graphTracer->setStyle(QCPItemTracer::tsNone);
graphTracer->setInterpolating(true);
tracerTestTracer = graphTracer;
connect(customPlot, SIGNAL(mouseMove(QMouseEvent*)), this, SLOT(tracerTestMouseMove(QMouseEvent*)));
graphTracer->setStyle(QCPItemTracer::tsSquare);
QCPItemText *text = new QCPItemText(customPlot);
customPlot->addItem(text);
text->setText("Tracer");
text->setPositionAlignment(Qt::AlignBottom|Qt::AlignHCenter);
text->position->setType(QCPItemPosition::ptAxisRectRatio);
text->position->setCoords(0.5, 0.05);
text->setPen(QPen());
QCPItemCurve *curve = new QCPItemCurve(customPlot);
customPlot->addItem(curve);
curve->start->setParentAnchor(text->bottom);
curve->startDir->setParentAnchor(curve->start);
curve->startDir->setCoords(0, 100);
curve->end->setParentAnchor(tracerTestTracer->position);
curve->end->setCoords(0, -5);
curve->endDir->setParentAnchor(curve->end);
curve->endDir->setCoords(0, -100);
curve->setHead(QCPLineEnding::esSpikeArrow);
}
