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1 | 1 | #include "chartview.h" |
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2 | 2 | #include <qlinechartseries.h> |
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3 | 3 | #include <QTime> |
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4 | 4 | |
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5 | 5 | ChartView::ChartView(QWidget* parent):QChartView(parent), |
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6 | 6 | m_index(0) |
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7 | 7 | { |
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8 | 8 | QObject::connect(&m_timer,SIGNAL(timeout()),this,SLOT(handleTimeout())); |
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9 | 9 | m_timer.setInterval(3000); |
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10 | 10 | |
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11 | 11 | QTime now = QTime::currentTime(); |
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12 | 12 | qsrand((uint)now.msec()); |
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13 | 13 | |
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14 | 14 | QLineChartSeries* series0 = new QLineChartSeries(); |
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15 | 15 | QPen blue(Qt::blue); |
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16 | 16 | blue.setWidth(3); |
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17 | 17 | series0->setPen(blue); |
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18 | 18 | QLineChartSeries* series1 = new QLineChartSeries(); |
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19 | 19 | QPen red(Qt::red); |
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20 | 20 | red.setWidth(3); |
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21 | 21 | series1->setPen(red); |
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22 | 22 | QLineChartSeries* series2 = new QLineChartSeries(); |
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23 | 23 | QPen green(Qt::green); |
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24 | 24 | green.setWidth(3); |
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25 | 25 | series2->setPen(green); |
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26 | 26 | |
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27 | 27 | int numPoints = 10; |
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28 | 28 | |
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29 | 29 | for (int x = 0; x <= numPoints; ++x) { |
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30 | 30 | series0->add(x, qrand() % 100); |
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31 | 31 | series1->add(x, qrand() % 100); |
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32 | 32 | series2->add(x, qrand() % 100); |
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33 | 33 | } |
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34 | 34 | |
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35 | 35 | addSeries(series0); |
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36 | 36 | |
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37 | 37 | m_series<<series0; |
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38 | 38 | m_series<<series1; |
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39 | 39 | m_series<<series2; |
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40 | 40 | |
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41 | 41 | m_timer.start(); |
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42 | 42 | } |
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43 | 43 | |
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44 | 44 | ChartView::~ChartView() |
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45 | 45 | { |
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46 | ||
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46 | if(m_series.size()==0) return; | |
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47 | removeSeries(m_series.at(m_index)); | |
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48 | qDeleteAll(m_series); | |
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47 | 49 | } |
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48 | 50 | |
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49 | 51 | void ChartView::handleTimeout() |
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50 | 52 | { |
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51 | 53 | if(m_series.size()==0) return; |
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52 | 54 | |
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53 | 55 | removeSeries(m_series.at(m_index)); |
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54 | 56 | m_index++; |
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55 | 57 | m_index=m_index%m_series.size(); |
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56 | 58 | addSeries(m_series.at(m_index)); |
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57 | 59 | } |
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