More information about QwtLegendLabel

[Sangfeust]

Hello,

I am using the legend to show/hide my curve and it works fine.

But I am looking for a way to set the QwtLegendLabel of the curve to SET when attached to the plot...

Can someone help me?
I have not find how to reach easyli QwtLegendLabel of a curve...

I use this to show/hide:

void GraphB::showCurve( QwtPlotItem *item, bool on )
{
  // Show/hide the curve
  item->setVisible( on );
 
  // Get QwtLegend .... but why
  QwtLegend *lgd = qobject_cast<QwtLegend *>( legend() );
 
  // List of widget from QwtLegend associate to item
  QList<QWidget *> legendWidgets =
      lgd->legendWidgets( itemToInfo( item ) );
 
  // ????
  if ( legendWidgets.size() == 1 )
    {
      // legendLabel is the frame of the legend label
      QwtLegendLabel *legendLabel =
          qobject_cast<QwtLegendLabel *>( legendWidgets[0] );
 
      // If we have the object check it
      if ( legendLabel )
        legendLabel->setChecked( on );
    }
 
  replot();
}

void GraphB::showCurve( QwtPlotItem *item, bool on )
{
  // Show/hide the curve
  item->setVisible( on );

  // Get QwtLegend .... but why
  QwtLegend *lgd = qobject_cast<QwtLegend *>( legend() );

  // List of widget from QwtLegend associate to item
  QList<QWidget *> legendWidgets =
      lgd->legendWidgets( itemToInfo( item ) );

  // ????
  if ( legendWidgets.size() == 1 )
    {
      // legendLabel is the frame of the legend label
      QwtLegendLabel *legendLabel =
          qobject_cast<QwtLegendLabel *>( legendWidgets[0] );

      // If we have the object check it
      if ( legendLabel )
        legendLabel->setChecked( on );
    }

  replot();
}

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I am also looking for a method to hide the yAxis of the QwtPlotCurve... if someone has already done something

Thanks
Sangfeust