cpuaveragecurve.cpp

来自「软件无线电的平台」· C++ 代码 · 共 38 行

#include <qpainter.h>
#include <qwt_painter.h>
#include "cpuplot.h"
#include "cpuaveragecurve.h"

CpuAverageCurve::CpuAverageCurve(CpuPlot *plot):
    QwtPlotCurve(plot)
{
}

void CpuAverageCurve::drawCurve(QPainter *painter, int,
    const QwtDiMap &xMap, const QwtDiMap &yMap, int from, int to)
{
    QPointArray polyline( 2 * (to - from + 1));

    int idx = 0;
    for (register int i = from; i <= to; i++, idx++)
    {
        int xi = xMap.transform(x(i));
        int yi = yMap.transform(y(i));

        polyline.setPoint(idx, xi, yi);
    }

    const CpuPlot *plot = (const CpuPlot *)parentPlot();
    const QwtPlotCurve *totalCurve = plot->cpuCurve(CpuPlot::Total);

    for (register int j = to; j >= from; j--, idx++)
    {
        int xj = xMap.transform(totalCurve->x(j));
        int yj = yMap.transform(totalCurve->y(j));

        polyline.setPoint(idx, xj, yj);
    }

    QwtPainter::drawPolygon(painter, polyline);
}