plotter.cc

// **************************************************************************
// File: plotter.cc
//
// Author:    Phil Gillaspy
//
// Last Modified: 04/18/2012
//
// Description:
//   This is the class which plots the GQ GMC's CPM data.
//
//   This code is virtually copied verbatim from the book "C++ GUI
//   Programming with Qt4".
//
//
// *************************************************************************

#include <QtGui>
#include <cmath>

#include "plotter.hh"

extern int numPoints;
extern void getCPM(int i);

const  int kSampleInterval = 10000;  // CPM every 10 seconds

Plotter::Plotter(QWidget *parent)
    : QWidget(parent)
{
    setBackgroundRole(QPalette::Dark);
    setAutoFillBackground(true);
    setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    setFocusPolicy(Qt::StrongFocus);
    rubberBandIsShown = false;

    zoomInButton = new QToolButton(this);
    zoomInButton->setIcon(QIcon(":/images/zoomin.png"));
    zoomInButton->adjustSize();
    connect(zoomInButton, SIGNAL(clicked()), this, SLOT(zoomIn()));

    zoomOutButton = new QToolButton(this);
    zoomOutButton->setIcon(QIcon(":/images/zoomout.png"));
    zoomOutButton->adjustSize();
    connect(zoomOutButton, SIGNAL(clicked()), this, SLOT(zoomOut()));

    setPlotSettings(PlotSettings());

    sampleCnt = 0;
    myTimerID = 0;
    bScroll   = false;
}

void Plotter::startSample()
{
  myTimerID = startTimer(1000);
}

void Plotter::timerEvent(QTimerEvent * event)
{
  if (event->timerId() == myTimerID)
  {
    getCPM(sampleCnt);
    ++sampleCnt;
    if (sampleCnt >= numPoints)
    {
      bScroll   = true;
      sampleCnt = numPoints/2;
    }
    else
      bScroll   = false;