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feiyangqingyun
2022-05-18 17:39:04 +08:00
parent 96938b94f9
commit a155ad45d3
32 changed files with 145 additions and 322 deletions
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4
third/qcustomplotdemo/frmexample/frmsimple.cpp
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@@ -21,6 +21,7 @@ void frmSimple::initForm()
ui->customPlot->graph(0)->setBrush(QBrush(QColor(0, 0, 255, 20))); // first graph will be filled with translucent blue
ui->customPlot->addGraph();
ui->customPlot->graph(1)->setPen(QPen(Qt::red)); // line color red for second graph
// generate some points of data (y0 for first, y1 for second graph):
QVector<double> x(251), y0(251), y1(251);
for (int i = 0; i < 251; ++i) {
@@ -28,15 +29,18 @@ void frmSimple::initForm()
y0[i] = qExp(-i / 150.0) * qCos(i / 10.0); // exponentially decaying cosine
y1[i] = qExp(-i / 150.0); // exponential envelope
}
// configure right and top axis to show ticks but no labels:
// (see QCPAxisRect::setupFullAxesBox for a quicker method to do this)
ui->customPlot->xAxis2->setVisible(true);
ui->customPlot->xAxis2->setTickLabels(false);
ui->customPlot->yAxis2->setVisible(true);
ui->customPlot->yAxis2->setTickLabels(false);
// make left and bottom axes always transfer their ranges to right and top axes:
connect(ui->customPlot->xAxis, SIGNAL(rangeChanged(QCPRange)), ui->customPlot->xAxis2, SLOT(setRange(QCPRange)));
connect(ui->customPlot->yAxis, SIGNAL(rangeChanged(QCPRange)), ui->customPlot->yAxis2, SLOT(setRange(QCPRange)));
// pass data points to graphs:
ui->customPlot->graph(0)->setData(x, y0);
ui->customPlot->graph(1)->setData(x, y1);