Wladimir J. van der Laan
11 years ago
13 changed files with 618 additions and 9 deletions
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#include "trafficgraphwidget.h" |
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#include "clientmodel.h" |
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#include <QPainter> |
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#include <QColor> |
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#include <QTimer> |
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#include <cmath> |
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#define DESIRED_SAMPLES 800 |
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#define XMARGIN 10 |
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#define YMARGIN 10 |
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TrafficGraphWidget::TrafficGraphWidget(QWidget *parent) : |
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QWidget(parent), |
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timer(0), |
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fMax(0.0f), |
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nMins(0), |
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vSamplesIn(), |
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vSamplesOut(), |
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nLastBytesIn(0), |
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nLastBytesOut(0), |
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clientModel(0) |
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{ |
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timer = new QTimer(this); |
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connect(timer, SIGNAL(timeout()), SLOT(updateRates())); |
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} |
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void TrafficGraphWidget::setClientModel(ClientModel *model) |
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{ |
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clientModel = model; |
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if(model) { |
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nLastBytesIn = model->getTotalBytesRecv(); |
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nLastBytesOut = model->getTotalBytesSent(); |
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} |
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} |
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int TrafficGraphWidget::getGraphRangeMins() const |
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{ |
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return nMins; |
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} |
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void TrafficGraphWidget::paintPath(QPainterPath &path, QQueue<float> &samples) |
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{ |
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int h = height() - YMARGIN * 2, w = width() - XMARGIN * 2; |
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int sampleCount = samples.size(), x = XMARGIN + w, y; |
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if(sampleCount > 0) { |
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path.moveTo(x, YMARGIN + h); |
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for(int i = 0; i < sampleCount; ++i) { |
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x = XMARGIN + w - w * i / DESIRED_SAMPLES; |
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y = YMARGIN + h - (int)(h * samples.at(i) / fMax); |
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path.lineTo(x, y); |
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} |
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path.lineTo(x, YMARGIN + h); |
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} |
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} |
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void TrafficGraphWidget::paintEvent(QPaintEvent *) |
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{ |
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QPainter painter(this); |
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painter.fillRect(rect(), Qt::black); |
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if(fMax <= 0.0f) return; |
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QColor axisCol(Qt::gray); |
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int h = height() - YMARGIN * 2; |
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painter.setPen(axisCol); |
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painter.drawLine(XMARGIN, YMARGIN + h, width() - XMARGIN, YMARGIN + h); |
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// decide what order of magnitude we are
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int base = floor(log10(fMax)); |
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float val = pow(10.0f, base); |
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const QString units = tr("KB/s"); |
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// draw lines
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painter.setPen(axisCol); |
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painter.drawText(XMARGIN, YMARGIN + h - h * val / fMax, QString("%1 %2").arg(val).arg(units)); |
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for(float y = val; y < fMax; y += val) { |
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int yy = YMARGIN + h - h * y / fMax; |
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painter.drawLine(XMARGIN, yy, width() - XMARGIN, yy); |
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} |
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// if we drew 3 or fewer lines, break them up at the next lower order of magnitude
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if(fMax / val <= 3.0f) { |
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axisCol = axisCol.darker(); |
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val = pow(10.0f, base - 1); |
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painter.setPen(axisCol); |
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painter.drawText(XMARGIN, YMARGIN + h - h * val / fMax, QString("%1 %2").arg(val).arg(units)); |
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int count = 1; |
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for(float y = val; y < fMax; y += val, count++) { |
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// don't overwrite lines drawn above
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if(count % 10 == 0) |
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continue; |
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int yy = YMARGIN + h - h * y / fMax; |
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painter.drawLine(XMARGIN, yy, width() - XMARGIN, yy); |
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} |
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} |
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if(!vSamplesIn.empty()) { |
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QPainterPath p; |
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paintPath(p, vSamplesIn); |
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painter.fillPath(p, QColor(0, 255, 0, 128)); |
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painter.setPen(Qt::green); |
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painter.drawPath(p); |
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} |
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if(!vSamplesOut.empty()) { |
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QPainterPath p; |
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paintPath(p, vSamplesOut); |
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painter.fillPath(p, QColor(255, 0, 0, 128)); |
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painter.setPen(Qt::red); |
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painter.drawPath(p); |
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} |
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} |
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void TrafficGraphWidget::updateRates() |
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{ |
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if(!clientModel) return; |
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quint64 bytesIn = clientModel->getTotalBytesRecv(), |
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bytesOut = clientModel->getTotalBytesSent(); |
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float inRate = (bytesIn - nLastBytesIn) / 1024.0f * 1000 / timer->interval(); |
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float outRate = (bytesOut - nLastBytesOut) / 1024.0f * 1000 / timer->interval(); |
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vSamplesIn.push_front(inRate); |
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vSamplesOut.push_front(outRate); |
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nLastBytesIn = bytesIn; |
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nLastBytesOut = bytesOut; |
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while(vSamplesIn.size() > DESIRED_SAMPLES) { |
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vSamplesIn.pop_back(); |
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} |
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while(vSamplesOut.size() > DESIRED_SAMPLES) { |
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vSamplesOut.pop_back(); |
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} |
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float tmax = 0.0f; |
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foreach(float f, vSamplesIn) { |
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if(f > tmax) tmax = f; |
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} |
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foreach(float f, vSamplesOut) { |
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if(f > tmax) tmax = f; |
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} |
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fMax = tmax; |
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update(); |
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} |
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void TrafficGraphWidget::setGraphRangeMins(int mins) |
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{ |
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nMins = mins; |
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int msecsPerSample = nMins * 60 * 1000 / DESIRED_SAMPLES; |
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timer->stop(); |
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timer->setInterval(msecsPerSample); |
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clear(); |
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} |
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void TrafficGraphWidget::clear() |
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{ |
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timer->stop(); |
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vSamplesOut.clear(); |
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vSamplesIn.clear(); |
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fMax = 0.0f; |
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if(clientModel) { |
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nLastBytesIn = clientModel->getTotalBytesRecv(); |
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nLastBytesOut = clientModel->getTotalBytesSent(); |
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} |
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timer->start(); |
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} |
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@ -0,0 +1,44 @@
@@ -0,0 +1,44 @@
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#ifndef TRAFFICGRAPHWIDGET_H |
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#define TRAFFICGRAPHWIDGET_H |
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#include <QWidget> |
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#include <QQueue> |
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class ClientModel; |
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QT_BEGIN_NAMESPACE |
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class QPaintEvent; |
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class QTimer; |
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QT_END_NAMESPACE |
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class TrafficGraphWidget : public QWidget |
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{ |
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Q_OBJECT |
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public: |
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explicit TrafficGraphWidget(QWidget *parent = 0); |
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void setClientModel(ClientModel *model); |
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int getGraphRangeMins() const; |
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protected: |
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void paintEvent(QPaintEvent *); |
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public slots: |
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void updateRates(); |
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void setGraphRangeMins(int mins); |
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void clear(); |
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private: |
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void paintPath(QPainterPath &path, QQueue<float> &samples); |
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QTimer *timer; |
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float fMax; |
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int nMins; |
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QQueue<float> vSamplesIn; |
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QQueue<float> vSamplesOut; |
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quint64 nLastBytesIn; |
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quint64 nLastBytesOut; |
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ClientModel *clientModel; |
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}; |
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#endif // TRAFFICGRAPHWIDGET_H
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