Problem in QCustomPlot class

Swinetha

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 ?

Swinetha

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

Swinetha

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