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Code: Alles auswählen

#include <QtGui>
#include <QApplication>

#include <qwt_plot.h>
#include <qwt_plot_curve.h>
#include <qwt_plot_canvas.h>
#include <qwt_plot_zoomer.h>
#include <qwt.h>

class MyPlot : public QwtPlot
{
public:
	MyPlot( QWidget *parent=0) : QwtPlot( parent )
	{

		double x[11], y1[11];
		// Show a title
		setTitle( "This is an Example" );

		// zooming
		QwtPlotCanvas *canvas1 = canvas();
		QwtPlotZoomer *canvas1Zoomer = new QwtPlotZoomer( QwtPlot::xBottom, QwtPlot::yLeft, canvas1 );
		canvas1Zoomer->setSelectionFlags( QwtPicker::DragSelection );
		canvas1Zoomer->setTrackerMode(QwtPicker::ActiveOnly);

		// Show the axes
		setAxisTitle( xBottom, "measurement number" );
		setAxisTitle( yLeft, "values" );

		QwtPlotCurve *curve1 = new QwtPlotCurve("Curve1");
		for (int i=0; i<=10; i++)
		{
			x[i] = i;
			y1[i] = i*2;
		}
		curve1->setData(x, y1, 10);
		curve1->attach(this);
		curve1->setStyle(QwtPlotCurve::CurveStyle(3));
		curve1->setPen(QPen( Qt::blue, 2, Qt::SolidLine ));

		// Show the plots
		replot();
	}
};

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    MyPlot p;
    p.show();

    return a.exec();
}

Code: Alles auswählen

#if QT_VERSION >= 0x045300  //alt #if QT_VERSION >= 0x040300