implement NoCurve in Qwt plot according to checkbox toggle

[uz_qt]

Hi all,

I have implmented plotting signals using Qwt.
What I want to do is depending on the checkbox status, the current curve should appear or disappear.
I have read about
NoCurve but I am not able to make it work in my program.

I have the following lines for drawing curves(two signals):


#include <qwt_plot_canvas.h>
#include <qwt_plot_marker.h>
#include <qwt_plot_curve.h>
#include <qwt_plot_grid.h>
#include <qwt_scale_widget.h>

Time plot::Timeplot (QWidget *parent )
:QwtPlot(parent)
{
int k;

QVector<QPen> vColor;
vColor.append(QPen(Qt::black));
vColor.append(QPen(Qt::red));

QVector<QwtPlotCurve*> pPlotCurveTime;

for (k=0; k< 2; k++)
{
pPlotCurveTime[k]->setPen(vColor[k%vColor.count()]);
}

/*--------- if Checkbox is on (set to true), run following lines of code ---------*/
for (k=0; k< 2; k++)
{
pPlotCurveTime[k]->setRawSamples((const T_DOUBLE*) pPlotData->pdTimeAxis, pPlotData->ppdSignal[k], pPlotData->iSignalMemoryLength);
}
}


Now, if the Checkbox is toggled off (set to false), then the above plotted curve should disappear (similar to NoCurve).

What should be done to achieve this goal?

Please help! Thanks.

[Uwe]

See QwtPlotItem::setVisisble( bool )

Uwe