qt图表二：QLineSeries |
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qt图表二：QLineSeries
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qt图标系列二 qt图表一 ：splinechart 效果图： 接着上篇文章的代码，我想把QLineSeries加到上个图例中，新建一个类继承QChartView 思路如下： QChart *chart = new QChart(); 用于管理QLineSeries，坐标轴及图例 创建坐标轴： QValueAxis* mAxY = new QValueAxis(); 并设置 mAxY->setRange(0, 10);//y轴范围 mAxY->setTickCount(11); // Y轴分等份 mAxY->setTitleText(QString(tr("ReadRate(%)")));//设置提示 绑定坐标轴： chart->addAxis(mAxY, Qt::AlignLeft);创建QLineSeries： QLineSeries* mLineSeries = new QLineSeries(); chart->addSeries(mLineSeries);// 将系列添加到图表 mLineSeries->attachAxis(mAxY);//绑定坐标轴 //添加点 for(int i = 0 ;i append(i+1, i); }具体代码如下 oneline.h #ifndef ONELINE_H #define ONELINE_H #include QT_CHARTS_USE_NAMESPACE #include class OneLine : public QChartView { public: OneLine(); }; #endif // ONELINE_Honeline.cpp #include "oneline.h" #include QT_CHARTS_USE_NAMESPACE OneLine::OneLine() { QChart *chart = new QChart(); //设置坐标轴 QValueAxis* mAxY = new QValueAxis(); QValueAxis* mAxX = new QValueAxis(); QLineSeries* mLineSeries = new QLineSeries(); mAxY->setRange(0, 10);//y轴范围 mAxY->setTickCount(11); // Y轴分等份 mAxX->setRange(0,10); mAxX->setTickCount(11); // 将系列添加到图表 chart->addSeries(mLineSeries); chart->setTheme(QtCharts::QChart::ChartThemeBrownSand); mAxX->setTitleText(QString(tr("ImageNumber"))); mAxY->setTitleText(QString(tr("ReadRate(%)"))); chart->addAxis(mAxY, Qt::AlignLeft); chart->addAxis(mAxX, Qt::AlignBottom); mLineSeries->attachAxis(mAxY); mLineSeries->attachAxis(mAxX); //隐藏背景 chart->setBackgroundVisible(false); //设置外边界全部为0 chart->setContentsMargins(0, 0, 0, 0); //设置内边界全部为0 chart->setMargins(QMargins(0, 0, 0, 0)); //设置背景区域无圆角 chart->setBackgroundRoundness(0); //突出曲线上的点 mLineSeries->setPointsVisible(true); //图例 QLegend *mlegend = chart->legend(); mLineSeries->setName("testname"); mLineSeries->setColor(QColor(255,0,0)); //在底部显示 mlegend->setAlignment(Qt::AlignBottom); mlegend->show(); // 将图表绑定到视图 wiget 为 QChartView this->setChart(chart); for(int i = 0 ;i append(i+1, i); } }最后在主页面代码添加 OneLine* oneline=new OneLine(); baseLayout->addWidget(oneline, 2, 0);编译运行成功： |
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