Qt自定义动态折线图绘制

#include "bargraph.h" #include "mychartview.h" bargraph::bargraph(QWidget *parent) : QWidget(parent), m_axisYmin(0), m_axisYmax(30), m_XtickCount(10), m_axisXmin(0), m_axisXmax(30), m_YtickCount(10), m_chart(nullptr), m_chartView(nullptr), m_axisX(nullptr), m_axisY(nullptr), m_Xname("X轴"), m_Yname("Y轴") { init(); } void bargraph::setData(QMap<QString, QPointF> data) { QMapIterator<QString, QPointF> i(data); while (i.hasNext()) { i.next(); bool move = m_chartView->Moveorzoom(); if(i.value().x() > m_axisX->max()) { qreal leng = i.value().x() - m_axisX->max(); if(!move) { m_axisX->setMax(m_axisX->max() + leng); m_axisX->setMin(m_axisX->min() +leng); } else { m_chartView->setAxisXmax(m_axisX->max() + leng); m_chartView->setAxisXmin(m_axisX->min() +leng); } } if(i.value().y() > m_axisYmax) { if(!move) { m_axisY->setMax(i.value().y()); } else { m_chartView->setAxisYmax(i.value().y()); } m_axisYmax = i.value().y(); } if(i.value().y() < m_axisYmin) { if(!move) { m_axisY->setMin(i.value().y()); } else { m_chartView->setAxisYmin(i.value().y()); } m_axisYmin = i.value().y(); } if(!m_mapLineSeries.contains(i.key())) { QLineSeries *lineSeries = new QLineSeries(); lineSeries->setPointsVisible(false); lineSeries->setName(i.key()); lineSeries->append(i.value()); m_chart->addSeries(lineSeries); lineSeries->attachAxis(m_axisX); lineSeries->attachAxis(m_axisY); m_mapLineSeries.insert(i.key(),lineSeries); } else { m_mapLineSeries.value(i.key())->append(i.value()); } } } void bargraph::setData(QMap<QString, QList<QPointF>> data) { deleteLineSeries(); QMapIterator<QString, QList<QPointF>> i(data); while (i.hasNext()) { i.next(); QLineSeries *lineSeries = new QLineSeries(); lineSeries->setPointsVisible(false); lineSeries->setName(i.key()); lineSeries->append(i.value()); m_chart->addSeries(lineSeries); lineSeries->attachAxis(m_axisX); lineSeries->attachAxis(m_axisY); m_mapLineSeries.insert(i.key(),lineSeries); } } void bargraph::init() { m_axisX = new QValueAxis(); m_axisX->setTitleText(m_Xname); m_axisX->setMin(m_axisYmin); m_axisX->setMax(m_axisYmax); m_axisX->setTickCount(m_XtickCount); m_axisY = new QValueAxis(); m_axisY->setTitleText(m_Yname); m_axisY->setMin(m_axisXmin); m_axisY->setMax(m_axisXmax); m_axisYmin = m_axisY->min(); m_axisYmax = m_axisY->max(); m_axisY->setTickCount(m_YtickCount); m_chart = new QChart(); m_chart->setAnimationOptions(QChart::SeriesAnimations); m_chart->addAxis(m_axisY,Qt::AlignLeft); m_chart->addAxis(m_axisX,Qt::AlignBottom); m_chartView = new MyChartView(m_chart); m_chartView->setRenderHint(QPainter::Antialiasing); QGridLayout *gridLayout = new QGridLayout(this); gridLayout->setContentsMargins(0,0,0,0); gridLayout->addWidget(m_chartView); this->setLayout(gridLayout); this->setContentsMargins(0,0,0,0); } QString bargraph::Xname() const { return m_Xname; } void bargraph::setXname(const QString &newXname) { if (m_Xname == newXname) return; m_Xname = newXname; m_axisX->setTitleText(m_Xname); emit XnameChanged(); } QString bargraph::Yname() const { return m_Yname; } void bargraph::setYname(const QString &newYname) { if (m_Yname == newYname) return; m_Yname = newYname; m_axisY->setTitleText(m_Yname); emit YnameChanged(); } qreal bargraph::XtickCount() const { return m_XtickCount; } void bargraph::setXtickCount(qreal newXtickCount) { if (qFuzzyCompare(m_XtickCount, newXtickCount)) return; m_XtickCount = newXtickCount; m_axisX->setTickCount(m_XtickCount); emit XtickCountChanged(); } qreal bargraph::YtickCount() const { return m_YtickCount; } void bargraph::setYtickCount(qreal newYtickCount) { if (qFuzzyCompare(m_YtickCount, newYtickCount)) return; m_YtickCount = newYtickCount; m_axisY->setTickCount(m_YtickCount); emit YtickCountChanged(); } QValueAxis *bargraph::axisY() const { return m_axisY; } QValueAxis *bargraph::axisX() const { return m_axisX; } QChart *bargraph::chart() const { return m_chart; } qreal bargraph::axisXmax() const { return m_axisXmax; } void bargraph::setAxisXmax(qreal newAxisXmax) { if (qFuzzyCompare(m_axisXmax, newAxisXmax)) return; m_axisXmax = newAxisXmax; m_axisX->setMax(m_axisXmax); emit axisXmaxChanged(); } qreal bargraph::axisXmin() const { return m_axisXmin; } void bargraph::setAxisXmin(qreal newAxisXmin) { if (qFuzzyCompare(m_axisXmin, newAxisXmin)) return; m_axisXmin = newAxisXmin; m_axisX->setMin(m_axisXmin); emit axisXminChanged(); } qreal bargraph::axisYmax() const { return m_axisYmax; } void bargraph::setAxisYmax(qreal newAxisYmax) { if (qFuzzyCompare(m_axisYmax, newAxisYmax)) return; m_axisYmax = newAxisYmax; m_axisY->setMax(m_axisYmax); emit axisYmaxChanged(); } qreal bargraph::axisYmin() const { return m_axisYmin; } void bargraph::setAxisYmin(qreal newAxisYmin) { if (qFuzzyCompare(m_axisYmin, newAxisYmin)) return; m_axisYmin = newAxisYmin; m_axisY->setMin(m_axisYmin); emit axisYminChanged(); } void bargraph::deleteLineSeries() { QMapIterator<QString, QLineSeries *> i(m_mapLineSeries); while (i.hasNext()) { i.next(); m_chart->removeSeries(i.value()); delete i.value(); } m_mapLineSeries.clear(); } void bargraph::deleteLineSeries(QString seriesName) { QLineSeries *tmp = m_mapLineSeries.value(seriesName,nullptr); if(!tmp) { m_chart->removeSeries(tmp); delete tmp; m_mapLineSeries.remove(seriesName); } } void bargraph::mouseMoveEvent(QMouseEvent *event) { if(event->buttons() == Qt::LeftButton) { qDebug()<<event->pos()- QPoint(110,0); m_chart->mapToValue(event->pos() - QPoint(110,0)); } }