Problem in QCustomPlot class

? Offline

hai I am using QCustomPlot in one of my application.

while adding graph application is unexcpectedly closed

in my mainwindow.cpp

m_pCustomPlot->addGraph();(M_pCustomPlot is QCustomPlot*)

@
QCPGraph *QCustomPlot::addGraph(QCPAxis *keyAxis, QCPAxis *valueAxis)
{
if (!keyAxis) keyAxis = xAxis;
if (!valueAxis) valueAxis = yAxis;
if (!keyAxis || !valueAxis)
{
qDebug() << Q_FUNC_INFO << "can't use default QCustomPlot xAxis or yAxis, because at least one is invalid (has been deleted)";
return 0;
}
if (keyAxis->parentPlot() != this || valueAxis->parentPlot() != this)
{
qDebug() << Q_FUNC_INFO << "passed keyAxis or valueAxis doesn't have this QCustomPlot as parent";
return 0;
}
@

in above code while assigning xAxis to keyAxis The program has unexpectedly finished.

and

ploting initialisation is as shown below
@
m_pCustomPlot->setWindowFlags(Qt::FramelessWindowHint);

m_pCustomPlot->setMinimumSize(210,240);
m_pCustomPlot->setGeometry(0,70,240,240);
m_pCustomPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom | QCP::iSelectAxes | QCP::iSelectLegend | QCP::iSelectPlottables);

QFont legendFont = font();
legendFont.setPointSize(8);

m_pCustomPlot->xAxis->setRange(0,16384);
m_pCustomPlot->yAxis->setRange(0,20000);
m_pCustomPlot->axisRect()->setupFullAxesBox();

m_pCustomPlot->plotLayout()->insertRow(0);

m_pCustomPlot->xAxis->setLabel("Bin");
m_pCustomPlot->xAxis->setLabelFont(legendFont);
m_pCustomPlot->yAxis->setLabelFont(legendFont);
m_pCustomPlot->yAxis->setLabel("Bin Count");

@

can any one please suggest me where I did mistake?

Thanks in advance

SGaist

Hi,

Did you correctly initialize (as in allocate) m_pCustomPlot ?

? Offline

yes I did.
@
m_pCustomPlot = NULL;
if(m_pCustomPlot == NULL){
m_pCustomPlot = new QCustomPlot();
m_pCustomPlot->setGeometry(0,0,120,80);
m_pCustomPlot->resize(120,80);
}
@

SGaist

Then, run your program using the debugger, it will give you more information about what happens when it crashes

? Offline

My project was in Debug mode but it's not giving any information.

I have one more doubt, Can I use QCustomPlot to plot the graph continuously means can i update the garph for evry one sec.

SGaist

For such specialized question, you should contact the author of the library directly