Crosshairs that are always on (Qwt 6.1.2) [SOLVED]

[AlekseyK]

This issue was solved in 2009: http://www.qtcentre.org/threads/1701...2169#post92169, however seems not working in 6.1.2 because of changed API. Any way to activate the rubber band without having to click the mouse in Qwt 6.1.2?

Tried following code with no luck for now - see no crosshairs:

ConstPicker::ConstPicker(QwtPlotCanvas *canvas)
  : QwtPlotPicker(QwtPlot::xBottom, QwtPlot::yLeft, canvas)
{
  setRubberBand(QwtPlotPicker::CrossRubberBand);
  // Light gray, 1 point width, dash line
  setRubberBandPen(QPen(QBrush(QColor(Qt::lightGray)), 1, Qt::DashLine));
  setRubberBand(QwtPicker::CrossRubberBand);
 
  canvas->setMouseTracking(true);
}
 
QwtPickerMachine *ConstPicker::stateMachine(int) const
{
  return new QwtPickerTrackerMachine();
}

ConstPicker::ConstPicker(QwtPlotCanvas *canvas)
  : QwtPlotPicker(QwtPlot::xBottom, QwtPlot::yLeft, canvas)
{
  setRubberBand(QwtPlotPicker::CrossRubberBand);
  // Light gray, 1 point width, dash line
  setRubberBandPen(QPen(QBrush(QColor(Qt::lightGray)), 1, Qt::DashLine));
  setRubberBand(QwtPicker::CrossRubberBand);

  canvas->setMouseTracking(true);
}

QwtPickerMachine *ConstPicker::stateMachine(int) const
{
  return new QwtPickerTrackerMachine();
}

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[AlekseyK]

Found the answer here: http://www.qtcentre.org/threads/3971...409#post182409

So correct code will be:

ConstPicker::ConstPicker(QwtPlotCanvas *canvas)
  : QwtPlotPicker(QwtPlot::xBottom,  QwtPlot::yLeft,
                  QwtPlotPicker::CrossRubberBand, QwtPicker::AlwaysOn,
                  canvas)
{
  // Light gray, 1 point width, dash line
  setRubberBandPen(QPen(QBrush(QColor(Qt::lightGray)), 1, Qt::DashLine));
  setRubberBand(QwtPicker::CrossRubberBand);
  setStateMachine(new QwtPickerTrackerMachine());
}

ConstPicker::ConstPicker(QwtPlotCanvas *canvas)
  : QwtPlotPicker(QwtPlot::xBottom,  QwtPlot::yLeft,
                  QwtPlotPicker::CrossRubberBand, QwtPicker::AlwaysOn,
                  canvas)
{
  // Light gray, 1 point width, dash line
  setRubberBandPen(QPen(QBrush(QColor(Qt::lightGray)), 1, Qt::DashLine));
  setRubberBand(QwtPicker::CrossRubberBand);
  setStateMachine(new QwtPickerTrackerMachine());
}

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