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

Fix memory leak in presenter example

Michal Klocek - - Load All Authors

File last commit:

r257:0ac69f2530b6


                r257:0ac69f2530b6

Download file

             chartview.cpp
        
                    59 lines
            
             | 1.3 KiB
            
                | text/x-c
            
             |
                CppLexer
            
             / example / presenterchart / chartview.cpp
          
                    History
                
                 |
                  Source
                 | Raw
                 |Copy content
                 |Copy permalink

        Michal Klocek
    
Adds preseterchart example

              r246
            
      #include "chartview.h"

      #include <qlinechartseries.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());

          QLineChartSeries* series0 = new QLineChartSeries();

          QPen blue(Qt::blue);

          blue.setWidth(3);

          series0->setPen(blue);

          QLineChartSeries* series1 = new QLineChartSeries();

          QPen red(Qt::red);

          red.setWidth(3);

          series1->setPen(red);

          QLineChartSeries* series2 = new QLineChartSeries();

          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()

      {

        Michal Klocek
    
Fix memory leak in presenter example

              r257
            
          if(m_series.size()==0) return;

          removeSeries(m_series.at(m_index));

          qDeleteAll(m_series);

        Michal Klocek
    
Adds preseterchart example

              r246
            
      }

      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));

      }

	Site-wide shortcuts
/	Use quick search box
g h	Goto home page
g g	Goto my private gists page
g G	Goto my public gists page
g 0-9	Goto bookmarked items from 0-9
n r	New repository page
n g	New gist page

	Repositories
g s	Goto summary page
g c	Goto changelog page
g f	Goto files page
g F	Goto files page with file search activated
g p	Goto pull requests page
g o	Goto repository settings
g O	Goto repository access permissions settings
t s	Toggle sidebar on some pages

Michal Klocek Adds preseterchart example	r246	#include "chartview.h"
		#include <qlinechartseries.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());

		QLineChartSeries* series0 = new QLineChartSeries();
		QPen blue(Qt::blue);
		blue.setWidth(3);
		series0->setPen(blue);
		QLineChartSeries* series1 = new QLineChartSeries();
		QPen red(Qt::red);
		red.setWidth(3);
		series1->setPen(red);
		QLineChartSeries* series2 = new QLineChartSeries();
		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()
		{
Michal Klocek Fix memory leak in presenter example	r257	if(m_series.size()==0) return;
		removeSeries(m_series.at(m_index));
		qDeleteAll(m_series);
Michal Klocek Adds preseterchart example	r246	}

		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));
		}