HG_REPOSITORIES/LPP/INSTRUMENTATION/USERS/JEANDET/qtcharts Files · example/presenterchart/chartview.cpp

Better way to enable features to user. Do less, but expose signals to user and allow user to descide what to do.

Michal Klocek - - Load All Authors

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             chartview.cpp
        
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      #include "chartview.h"

      #include <qlineseries.h>

      #include <QTime>

      ChartView::ChartView(QWidget* parent):QChartView(parent),

      m_index(0)

      {

          QObject::connect(&m_timer,SIGNAL(timeout()),this,SLOT(handleTimeout()));

          m_timer.setInterval(3000);

          QTime now = QTime::currentTime();

          qsrand((uint)now.msec());

          QLineSeries* series0 = new QLineSeries();

          QPen blue(Qt::blue);

          blue.setWidth(3);

          series0->setPen(blue);

          QLineSeries* series1 = new QLineSeries();

          QPen red(Qt::red);

          red.setWidth(3);

          series1->setPen(red);

          QLineSeries* series2 = new QLineSeries();

          QPen green(Qt::green);

          green.setWidth(3);

          series2->setPen(green);

          int numPoints = 10;

          for (int x = 0; x <= numPoints; ++x) {

              series0->add(x,  qrand() % 100);

              series1->add(x,  qrand() % 100);

              series2->add(x,  qrand() % 100);

          }

          addSeries(series0);

          m_series<<series0;

          m_series<<series1;

          m_series<<series2;

          m_timer.start();

      }

      ChartView::~ChartView()

      {

          if(m_series.size()==0) return;

          removeSeries(m_series.at(m_index));

          qDeleteAll(m_series);

      }

      void ChartView::handleTimeout()

      {

          if(m_series.size()==0) return;

          removeSeries(m_series.at(m_index));

          m_index++;

          m_index=m_index%m_series.size();

          addSeries(m_series.at(m_index));

      }

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				#include "chartview.h"
				#include <qlineseries.h>
				#include <QTime>

				ChartView::ChartView(QWidget* parent):QChartView(parent),
				m_index(0)
				{
				QObject::connect(&m_timer,SIGNAL(timeout()),this,SLOT(handleTimeout()));
				m_timer.setInterval(3000);

				QTime now = QTime::currentTime();
				qsrand((uint)now.msec());

				QLineSeries* series0 = new QLineSeries();
				QPen blue(Qt::blue);
				blue.setWidth(3);
				series0->setPen(blue);
				QLineSeries* series1 = new QLineSeries();
				QPen red(Qt::red);
				red.setWidth(3);
				series1->setPen(red);
				QLineSeries* series2 = new QLineSeries();
				QPen green(Qt::green);
				green.setWidth(3);
				series2->setPen(green);

				int numPoints = 10;

				for (int x = 0; x <= numPoints; ++x) {
				series0->add(x, qrand() % 100);
				series1->add(x, qrand() % 100);
				series2->add(x, qrand() % 100);
				}

				addSeries(series0);

				m_series<<series0;
				m_series<<series1;
				m_series<<series2;

				m_timer.start();
				}

				ChartView::~ChartView()
				{
				if(m_series.size()==0) return;
				removeSeries(m_series.at(m_index));
				qDeleteAll(m_series);
				}

				void ChartView::handleTimeout()
				{
				if(m_series.size()==0) return;

				removeSeries(m_series.at(m_index));
				m_index++;
				m_index=m_index%m_series.size();
				addSeries(m_series.at(m_index));
				}