QwtPlot rendering when disabled

Qwt 6.0.3, Qt 4.8.4, Linux.

I was expecting this code to generate a disabled widget (it does) with the plot title, legend, and maybe plot curves, ghosted (it does not). The scales and their labels get ghosted. Am I missing something or is this a "feature"?

Code:

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#include <QtGui>
#include "qwt_plot.h"
#include <qwt_plot_curve.h>
#include <qwt_legend.h>
 
static const double x[] = { 0.0, 1.0, 2.0, 3.0 };
static const double y[] = { 0.0, 1.0, 4.0, 9.0 };
 
int main(int argc, char **argv)
{
    QApplication app(argc, argv);
 
    QwtPlot myPlot;
    myPlot.setTitle("Test");
    myPlot.setAxisTitle( QwtPlot::xBottom, "X" );
    myPlot.setAxisTitle( QwtPlot::yLeft, "Y" );
    QwtLegend *legend = new QwtLegend;
    myPlot.insertLegend( legend, QwtPlot::BottomLegend );
 
    QwtPlotCurve *curve = new QwtPlotCurve("Curve");
    curve->setLegendAttribute( QwtPlotCurve::LegendShowLine );
    curve->setPen(QColor(Qt::red));
    curve->setSamples(x, y, 4);
    curve->attach(&myPlot);
 
    myPlot.setEnabled(false);
    myPlot.show();
 
    return app.exec();
}

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Attachment 8921