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https://github.com/GoldenCheetah/GoldenCheetah.git
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check qwt-5.2, r588 into repository
This commit is contained in:
Sean Rhea
244
qwt/examples/cpuplot/cpuplot.cpp
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244
qwt/examples/cpuplot/cpuplot.cpp
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#include <qapplication.h>
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#include <qlayout.h>
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#include <qlabel.h>
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#include <qpainter.h>
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#include <qwt_plot_layout.h>
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#include <qwt_plot_curve.h>
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#include <qwt_scale_draw.h>
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#include <qwt_scale_widget.h>
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#include <qwt_legend.h>
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#include <qwt_legend_item.h>
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#include "cpupiemarker.h"
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#include "cpuplot.h"
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class TimeScaleDraw: public QwtScaleDraw
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{
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public:
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TimeScaleDraw(const QTime &base):
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baseTime(base)
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{
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}
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virtual QwtText label(double v) const
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{
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QTime upTime = baseTime.addSecs((int)v);
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return upTime.toString();
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}
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private:
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QTime baseTime;
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};
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class Background: public QwtPlotItem
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{
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public:
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Background()
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{
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setZ(0.0);
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}
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virtual int rtti() const
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{
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return QwtPlotItem::Rtti_PlotUserItem;
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}
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virtual void draw(QPainter *painter,
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const QwtScaleMap &, const QwtScaleMap &yMap,
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const QRect &rect) const
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{
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QColor c(Qt::white);
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QRect r = rect;
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for ( int i = 100; i > 0; i -= 10 )
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{
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r.setBottom(yMap.transform(i - 10));
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r.setTop(yMap.transform(i));
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painter->fillRect(r, c);
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c = c.dark(110);
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}
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}
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};
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class CpuCurve: public QwtPlotCurve
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{
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public:
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CpuCurve(const QString &title):
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QwtPlotCurve(title)
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{
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#if QT_VERSION >= 0x040000
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setRenderHint(QwtPlotItem::RenderAntialiased);
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#endif
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}
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void setColor(const QColor &color)
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{
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#if QT_VERSION >= 0x040000
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QColor c = color;
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c.setAlpha(150);
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setPen(c);
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setBrush(c);
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#else
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setPen(color);
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setBrush(QBrush(color, Qt::Dense4Pattern));
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#endif
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}
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};
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CpuPlot::CpuPlot(QWidget *parent):
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QwtPlot(parent),
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dataCount(0)
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{
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setAutoReplot(false);
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plotLayout()->setAlignCanvasToScales(true);
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QwtLegend *legend = new QwtLegend;
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legend->setItemMode(QwtLegend::CheckableItem);
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insertLegend(legend, QwtPlot::RightLegend);
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setAxisTitle(QwtPlot::xBottom, " System Uptime [h:m:s]");
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setAxisScaleDraw(QwtPlot::xBottom,
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new TimeScaleDraw(cpuStat.upTime()));
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setAxisScale(QwtPlot::xBottom, 0, HISTORY);
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setAxisLabelRotation(QwtPlot::xBottom, -50.0);
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setAxisLabelAlignment(QwtPlot::xBottom, Qt::AlignLeft | Qt::AlignBottom);
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/*
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In situations, when there is a label at the most right position of the
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scale, additional space is needed to display the overlapping part
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of the label would be taken by reducing the width of scale and canvas.
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To avoid this "jumping canvas" effect, we add a permanent margin.
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We don't need to do the same for the left border, because there
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is enough space for the overlapping label below the left scale.
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*/
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QwtScaleWidget *scaleWidget = axisWidget(QwtPlot::xBottom);
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const int fmh = QFontMetrics(scaleWidget->font()).height();
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scaleWidget->setMinBorderDist(0, fmh / 2);
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setAxisTitle(QwtPlot::yLeft, "Cpu Usage [%]");
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setAxisScale(QwtPlot::yLeft, 0, 100);
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Background *bg = new Background();
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bg->attach(this);
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CpuPieMarker *pie = new CpuPieMarker();
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pie->attach(this);
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CpuCurve *curve;
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curve = new CpuCurve("System");
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curve->setColor(Qt::red);
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curve->attach(this);
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data[System].curve = curve;
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curve = new CpuCurve("User");
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curve->setColor(Qt::blue);
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curve->setZ(curve->z() - 1);
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curve->attach(this);
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data[User].curve = curve;
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curve = new CpuCurve("Total");
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curve->setColor(Qt::black);
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curve->setZ(curve->z() - 2);
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curve->attach(this);
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data[Total].curve = curve;
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curve = new CpuCurve("Idle");
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curve->setColor(Qt::darkCyan);
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curve->setZ(curve->z() - 3);
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curve->attach(this);
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data[Idle].curve = curve;
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showCurve(data[System].curve, true);
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showCurve(data[User].curve, true);
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showCurve(data[Total].curve, false);
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showCurve(data[Idle].curve, false);
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for ( int i = 0; i < HISTORY; i++ )
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timeData[HISTORY - 1 - i] = i;
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(void)startTimer(1000); // 1 second
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connect(this, SIGNAL(legendChecked(QwtPlotItem *, bool)),
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SLOT(showCurve(QwtPlotItem *, bool)));
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}
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void CpuPlot::timerEvent(QTimerEvent *)
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{
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for ( int i = dataCount; i > 0; i-- )
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{
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for ( int c = 0; c < NCpuData; c++ )
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{
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if ( i < HISTORY )
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data[c].data[i] = data[c].data[i-1];
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}
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}
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cpuStat.statistic(data[User].data[0], data[System].data[0]);
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data[Total].data[0] = data[User].data[0] +
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data[System].data[0];
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data[Idle].data[0] = 100.0 - data[Total].data[0];
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if ( dataCount < HISTORY )
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dataCount++;
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for ( int j = 0; j < HISTORY; j++ )
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timeData[j]++;
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setAxisScale(QwtPlot::xBottom,
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timeData[HISTORY - 1], timeData[0]);
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for ( int c = 0; c < NCpuData; c++ )
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{
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data[c].curve->setRawData(
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timeData, data[c].data, dataCount);
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}
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replot();
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}
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void CpuPlot::showCurve(QwtPlotItem *item, bool on)
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{
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item->setVisible(on);
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QWidget *w = legend()->find(item);
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if ( w && w->inherits("QwtLegendItem") )
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((QwtLegendItem *)w)->setChecked(on);
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replot();
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}
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int main(int argc, char **argv)
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{
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QApplication a(argc, argv);
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QWidget vBox;
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#if QT_VERSION >= 0x040000
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vBox.setWindowTitle("Cpu Plot");
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#else
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vBox.setCaption("Cpu Plot");
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#endif
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CpuPlot *plot = new CpuPlot(&vBox);
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plot->setTitle("History");
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plot->setMargin(5);
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QString info("Press the legend to en/disable a curve");
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QLabel *label = new QLabel(info, &vBox);
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QVBoxLayout *layout = new QVBoxLayout(&vBox);
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layout->addWidget(plot);
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layout->addWidget(label);
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#if QT_VERSION < 0x040000
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a.setMainWidget(&vBox);
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#endif
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vBox.resize(600,400);
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vBox.show();
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return a.exec();
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}
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