mirror of
https://github.com/jkriege2/JKQtPlotter.git
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104 lines
4.0 KiB
C++
104 lines
4.0 KiB
C++
/** \example symbols_and_styles.cpp
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* JKQTPlotter: Examples: Line Graph with Different Symbols and Line Styles
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*
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* \ref JKQTPlotterSymbolsAndStyles
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*/
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#include <QApplication>
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#include "jkqtplotter/jkqtplotter.h"
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#include "jkqtplotter/graphs/jkqtpscatter.h"
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#include "jkqtplotter/jkqtptools.h"
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int main(int argc, char* argv[])
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{
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QApplication app(argc, argv);
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// 1. create a plotter window and get a pointer to the internal datastore (for convenience)
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JKQTPlotter plot;
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JKQTPDatastore* ds=plot.getDatastore();
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// 2. now we create data a vector of x-values for a simple plot (a sine curve)
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QVector<double> X1, X2;
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const int Ndata=10; // number of plot points in each curve
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for (int i=0; i<Ndata; i++) {
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const double x=double(i)/double(Ndata)*2.0*M_PI;
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if (i<Ndata/2) X1<<x;
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if (i>Ndata/2) X2<<x;
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}
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// and copy it to the datastore
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size_t columnX1=ds->addCopiedColumn(X1, "x1");
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size_t columnX2=ds->addCopiedColumn(X2, "x2");
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// 3. now we make several plots with different symbol styles and line-styles
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// for that we iterate over every symbol style and at the same time over
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// pen styles from the vector pens
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QVector<Qt::PenStyle> pens {Qt::SolidLine, Qt::DashLine, Qt::DotLine, Qt::DashDotLine, Qt::DashDotDotLine };
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int ipen=0;
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for (int symbolID=0; symbolID<=static_cast<int>(JKQTPMaxSymbolID); symbolID++) {
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// generate some plot data
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QVector<double> Y;
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const QVector<double>& X=(symbolID<=static_cast<int>(JKQTPMaxSymbolID)/2)?X1:X2;
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const double dy=(symbolID<=static_cast<int>(JKQTPMaxSymbolID)/2)?(static_cast<double>(symbolID)*1.5):(static_cast<double>(symbolID-static_cast<int>(JKQTPMaxSymbolID)/2)*1.5);
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for (auto& xx: X) {
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Y<<sin(xx)+dy;
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}
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JKQTPXYLineGraph* graph=new JKQTPXYLineGraph(&plot);
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// copy data into datastore and immediately set the yColumn
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graph->setXColumn((symbolID<=JKQTPMaxSymbolID/2)?columnX1:columnX2);
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graph->setYColumn(ds->addCopiedColumn(Y, "y"+QString::number(symbolID)));
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// set symbol + pen style and color
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graph->setSymbolType(static_cast<JKQTPGraphSymbols>(symbolID));
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graph->setLineStyle(pens[ipen]);
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QString lname=jkqtp_QPenStyle2String(graph->getLineStyle());
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graph->setDrawLine(static_cast<JKQTPGraphSymbols>(symbolID)!=JKQTPDot);
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if (!graph->getDrawLine()) lname="";
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// set symbol size
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graph->setSymbolSize(12);
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// set width of symbol lines
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graph->setSymbolLineWidth(1.5);
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// set width of graph line
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graph->setLineWidth(1);
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// graph title is made from symbol+penstyle
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graph->setTitle(JKQTPGraphSymbols2NameString(static_cast<JKQTPGraphSymbols>(graph->getSymbolType()))+QString(", ")+lname);
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// add the graph to the plot, so it is actually displayed
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plot.addGraph(graph);
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ipen++;
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if (ipen>=pens.size()) ipen=0;
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// create PNG with the symbol
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/*QPixmap pix(24,24);
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pix.fill(Qt::transparent);
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JKQTPEnhancedPainter p;
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p.begin(&pix);
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p.setRenderHint(JKQTPEnhancedPainter::Antialiasing);
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p.setRenderHint(JKQTPEnhancedPainter::TextAntialiasing);
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JKQTPPlotSymbol(p, pix.width()/2,pix.height()/2,static_cast<JKQTPGraphSymbols>(symbolID),pix.width()/1.2,1.5,QColor("blue"), QColor("blue").lighter());
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p.end();
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pix.save(JKQTPGraphSymbols2String(static_cast<JKQTPGraphSymbols>(symbolID))+".png", "PNG");*/
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}
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// 4. autoscale the plot so the graph is contained
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plot.getPlotter()->setKeyPosition(JKQTPKeyPosition::JKQTPKeyOutsideBottomLeft);
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plot.getPlotter()->setKeyLayout(JKQTPKeyLayout::JKQTPKeyLayoutMultiColumn);
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plot.getXAxis()->setShowZeroAxis(false);
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plot.getYAxis()->setShowZeroAxis(false);
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plot.setGrid(false);
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plot.zoomToFit();
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// 5. show plotter and make it a decent size
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plot.show();
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plot.resize(1200, 900);
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return app.exec();
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}
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