qavrgmeasurer.cpp

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#include "qavrgmeasurer.h"
//#include <qwt_data.h>
#include <stdio.h>

QavrgMeasurer::QavrgMeasurer(int xAxis, int yAxis, QWidget *canvas)
  : QwtPlotPicker(xAxis, yAxis, canvas),
    m_StartPoint(),
    m_Started(false)
{
  connections();
}

void QavrgMeasurer::connections()
{
  connect(this, SIGNAL(appended(const QPointF&)),
          this, SLOT(onAppended(const QPointF&)));

  connect(this, SIGNAL(selected(const QVector<QPointF>&)),
          this, SLOT(onSelected(const QVector<QPointF>&)));
}

QwtText QavrgMeasurer::trackerText(const QPointF &pos) const
{
  QwtText res;

  if (m_Started) {
    res = QwtText(tr("Start %1,%2\nEnd %3,%4\nDelta %5,%6")
                   .arg(m_StartPoint.x())
                   .arg(m_StartPoint.y())
                   .arg(pos.x())
                   .arg(pos.y())
                   .arg(pos.x()-m_StartPoint.x())
                   .arg(pos.y()-m_StartPoint.y()));
  } else {
    res = QwtText(tr("%1,%2")
                   .arg(pos.x())
                   .arg(pos.y()));
  }

  res.setColor(Qt::black);
//  res.setBackgroundPen(QPen(Qt::white));
  res.setBackgroundBrush(QBrush(Qt::white, Qt::SolidPattern));

//  QFont font;
//  font.setPointSize(7);
//  res.setFont(font);
  return res;
}

void QavrgMeasurer::onAppended(const QPointF &pt)
{
//  printf("appended %g,%g\n", pt.x(), pt.y());
  m_StartPoint = pt;
  m_Started = true;
}

void QavrgMeasurer::onSelected(const QVector<QPointF> &poly)
{
//  printf("selected\n");
  m_Started = false;

  QPointF pos = poly[1];

  emit printMessage(tr("Start (%1,%2) End (%3,%4) Delta (%5,%6)")
                   .arg(m_StartPoint.x())
                   .arg(m_StartPoint.y())
                   .arg(pos.x())
                   .arg(pos.y())
                   .arg(pos.x()-m_StartPoint.x())
                   .arg(pos.y()-m_StartPoint.y()));
}