Qwt Legend

[maxpayne]

hello,

i was observing the cpu plot example. On executing the binary i noticed that the "user" and the "system" legend items were already checked and the corresponding curves were shown. However i would like only one curve to be shown when the widget starts.

1. How do i change this default behavior ?
2. Secondly, when a legend item is clicked..say "total" i would like the previous selection to be unchecked automatically. This does not happen in the example.

The code looks something like this:

connect(this, SIGNAL(legendChecked(QwtPlotItem *, bool)),
        SLOT(showCurve(QwtPlotItem *, bool)));

connect(this, SIGNAL(legendChecked(QwtPlotItem *, bool)),
        SLOT(showCurve(QwtPlotItem *, bool)));

To copy to clipboard, switch view to plain text mode 

and

void CpuPlot::showCurve(QwtPlotItem *item, bool on)
{
    item->setVisible(on);
    QWidget *w = legend()->find(item);
    if ( w && w->inherits("QwtLegendItem") )
        ((QwtLegendItem *)w)->setChecked(on);
 
    replot();
}

void CpuPlot::showCurve(QwtPlotItem *item, bool on)
{
    item->setVisible(on);
    QWidget *w = legend()->find(item);
    if ( w && w->inherits("QwtLegendItem") )
        ((QwtLegendItem *)w)->setChecked(on);
    
    replot();
}

To copy to clipboard, switch view to plain text mode