QtChart绘制折线图

#include "mainwindow.h" #include <QApplication> #include <QtCharts/QChartView>//显示图表 #include <QtCharts/QLineSeries>//线系列 #include <QDoubleSpinBox> QT_CHARTS_USE_NAMESPACE//QtChart名空间 int main(int argc, char *argv[]) { QApplication a(argc, argv); MainWindow w; QList<QLineSeries *> m_series; QLineSeries *series1 = new QLineSeries();//实例化一个QLineSeries对象 QLineSeries *series2 = new QLineSeries();//实例化一个QLineSeries对象 m_series.append(series1); m_series.append(series2); //设置线条名称 series1->setName(QString("line " + QString::number(1))); series2->setName(QString("line " + QString::number(2))); //series->setName(QString("line " + QString::number(m_series.count()))); //设置线条颜色，如果不设置会给默认颜色 series1->setColor(QColor(255,0,255)); series2->setColor(QColor(0,255,255)); //series1->setBrush(QColor(255,0,255)); //series1->setPen(QColor(255,0,255)); //设置是否线条可视 series1->setVisible(true); series2->setVisible(true); //点标签是否可视 series1->setPointLabelsVisible(true); series2->setPointLabelsVisible(true); //点标签颜色 series1->setPointLabelsColor(QColor(255,255,255)); series2->setPointLabelsColor(QColor(255,255,255)); //点标签字体 series1->setPointLabelsFont(QFont("微软雅黑")); series2->setPointLabelsFont(QFont("微软雅黑")); //设置点标签显示格式 series1->setPointLabelsFormat("(@xPoint,@yPoint)"); series2->setPointLabelsFormat("(@xPoint,@yPoint)"); //是否切割边缘点标签，默认为true series1->setPointLabelsClipping(false); series2->setPointLabelsClipping(true); //设置点标签是否可视 series1->setPointsVisible(true); series2->setPointsVisible(true); //添加坐标点 series1->append(0, 6); series1->append(2, 4); series1->append(3, 8); series1->append(7, 4); series1->append(10, 5); *series1 << QPointF(11, 1) << QPointF(13, 3) << QPointF(17, 6) << QPointF(18, 3) << QPointF(20, 2); series2->append(0, 8); series2->append(2, 5); series2->append(3, 3); series2->append(7, 9); series2->append(10, 2); *series2 << QPointF(11, 3) << QPointF(13, 8) << QPointF(17, 2) << QPointF(18, 5) << QPointF(20, 7); QChart *chart = new QChart(); chart->setTheme(QChart::ChartThemeBlueCerulean);//设置系统主题 chart->setAnimationOptions(QChart::AllAnimations);//设置启用或禁用动画 //chart->setBackgroundBrush(QBrush(QColor(170,170,255)));//设置背景色,主题和背景二选一 //chart->setDropShadowEnabled(true);//是否背景阴影 chart->setLocalizeNumbers(true);//数字是否本地化 //chart->legend()->show();//legend是否显示，show和hide chart->addSeries(series1);//添加系列到QChart上 chart->addSeries(series2);//添加系列到QChart上 chart->createDefaultAxes();//创建默认轴 chart->setTitle("Simple line chart example");//设置标题 chart->setTitleBrush(QBrush(QColor(255,170,255)));//设置标题Brush chart->setTitleFont(QFont("微软雅黑"));//设置标题字体 chart->legend()->setVisible(true); chart->legend()->setAlignment(Qt::AlignBottom);//底部对齐 //chart->legend()->detachFromChart(); chart->legend()->setBackgroundVisible(true);//设置背景是否可视 //chart->legend()->setAutoFillBackground(true);//设置背景自动填充 //chart->legend()->setColor(QColor(255,128,128,128));//设置颜色 //chart->legend()->setContentsMargins(10,10,10,10);//设置边距left,top,right,bottom chart->legend()->setLabelColor(QColor(255,128,255));//设置标签颜色 chart->legend()->setVisible(true);//设置是否可视 //chart->legend()->setMaximumHeight(50); //chart->legend()->setMaximumWidth(120); //chart->legend()->setMaximumSize(10000); //chart->legend()->setGeometry(50,50,120,50);//设置几何位置x,y,w,h //chart->legend()->setBrush(QBrush(QColor(128,128,128,128))); //chart->legend()->setPen(QPen(QColor(192,192, 192,192))); chart->legend()->setBorderColor(QColor(255,255,170,185));//设置边框颜色 QFont font = chart->legend()->font(); font.setItalic(!font.italic()); chart->legend()->setFont(font);//设置字体为斜体 font.setPointSizeF(12); chart->legend()->setFont(font);//设置字体大小 chart->legend()->setFont(QFont("微软雅黑"));//设置字体类型 QChartView *chartView = new QChartView(chart); chartView->setRenderHint(QPainter::Antialiasing); w.setCentralWidget(chartView); w.resize(960, 720); w.show(); return a.exec(); }