Problem with QwtPlotIntervalCurve

[SandyEmerald]

I' m using Qwt 6.0.1 undex Linux. Here's code example:

QwtPlotIntervalCurve *curve = new QwtPlotIntervalCurve("Test interval curve");
 
    QVector<QwtIntervalSample> samples;
    QwtIntervalSample *sample;
    sample = new QwtIntervalSample(DBL_MIN, 300, 700);
    samples.push_back(*sample);
    sample = new QwtIntervalSample(DBL_MAX, 300, 700);
    samples.push_back(*sample);
 
    curve->setSamples(samples);
    curve->setStyle(QwtPlotIntervalCurve::Tube);
 
    curve->attach(ui->plot);
 
    ui->plot->replot();

QwtPlotIntervalCurve *curve = new QwtPlotIntervalCurve("Test interval curve");

    QVector<QwtIntervalSample> samples;
    QwtIntervalSample *sample;
    sample = new QwtIntervalSample(DBL_MIN, 300, 700);
    samples.push_back(*sample);
    sample = new QwtIntervalSample(DBL_MAX, 300, 700);
    samples.push_back(*sample);

    curve->setSamples(samples);
    curve->setStyle(QwtPlotIntervalCurve::Tube);

    curve->attach(ui->plot);

    ui->plot->replot();

To copy to clipboard, switch view to plain text mode 

After running i saw this:
plot1.png

and after i made right-click (i have default QwtPlotZoomer) i saw this:
plot2.png

So, how i can set infinite interval curve, Uwe?

[Uwe]

Sound like you want to use Qwt 6.1 and QwtPlotZoneItem. If you can't use 6.1 it should be easy to copy the implementation of QwtPlotZoneItem and port it back to 6.0

Uwe

[SandyEmerald]

Omg, so may problems with this DBL_MIN/DBL_MAX values
Uwe, could you tell me why QwtPlotIntervalPicker doesn' t support it?