void TrafficGraphWidget::paintEvent(QPaintEvent *)
{
QPainter painter(this);
painter.fillRect(rect(), Qt::black);
if(fMax <= 0.0f) return;
QColor axisCol(Qt::gray);
int h = height() - YMARGIN * 2;
painter.setPen(axisCol);
painter.drawLine(XMARGIN, YMARGIN + h, width() - XMARGIN, YMARGIN + h);
// decide what order of magnitude we are
int base = floor(log10(fMax));
float val = pow(10.0f, base);
const QString units = tr("KB/s");
const float yMarginText = 2.0;
// draw lines
painter.setPen(axisCol);
painter.drawText(XMARGIN, YMARGIN + h - h * val / fMax-yMarginText, QString("%1 %2").arg(val).arg(units));
for(float y = val; y < fMax; y += val) {
int yy = YMARGIN + h - h * y / fMax;
painter.drawLine(XMARGIN, yy, width() - XMARGIN, yy);
}
// if we drew 3 or fewer lines, break them up at the next lower order of magnitude
if(fMax / val <= 3.0f) {
axisCol = axisCol.darker();
val = pow(10.0f, base - 1);
painter.setPen(axisCol);
painter.drawText(XMARGIN, YMARGIN + h - h * val / fMax-yMarginText, QString("%1 %2").arg(val).arg(units));
int count = 1;
for(float y = val; y < fMax; y += val, count++) {
// don't overwrite lines drawn above
if(count % 10 == 0)
continue;
int yy = YMARGIN + h - h * y / fMax;
painter.drawLine(XMARGIN, yy, width() - XMARGIN, yy);
}
}
if(!vSamplesIn.empty()) {
QPainterPath p;
paintPath(p, vSamplesIn);
painter.fillPath(p, QColor(0, 255, 0, 128));
painter.setPen(Qt::green);
painter.drawPath(p);
}
if(!vSamplesOut.empty()) {
QPainterPath p;
paintPath(p, vSamplesOut);
painter.fillPath(p, QColor(255, 0, 0, 128));
painter.setPen(Qt::red);
painter.drawPath(p);
}
}
void TrafficGraphWidget::paintEvent(QPaintEvent *)
{
QPainter painter(this);
painter.fillRect(rect(), Qt::black);
if(fMax <= 0.0f) return;
QColor axisCol(Qt::gray);
QColor axisCol2;
int h = height() - YMARGIN * 2;
painter.setPen(axisCol);
painter.drawLine(XMARGIN, YMARGIN + h, width() - XMARGIN, YMARGIN + h);
// decide what order of magnitude we are
int base = floor(log10(fMax));
float val = pow(10.0f, base);
float val2;
const QString units = tr("KB/s");
const float yMarginText = 2.0;
// draw lines
painter.setPen(axisCol);
for(float y = val; y < fMax; y += val) {
int yy = YMARGIN + h - h * y / fMax;
painter.drawLine(XMARGIN, yy, width() - XMARGIN, yy);
}
// if we drew 3 or fewer lines, break them up at the next lower order of magnitude
if(fMax / val <= 3.0f) {
axisCol2 = axisCol.darker();
val2 = pow(10.0f, base - 1);
painter.setPen(axisCol2);
int count = 1;
for(float y = val2; y < fMax; y += val2, count++) {
// don't overwrite lines drawn above
if(count % 10 == 0)
continue;
int yy = YMARGIN + h - h * y / fMax;
painter.drawLine(XMARGIN, yy, width() - XMARGIN, yy);
}
}
const TrafficGraphData::SampleQueue& queue = trafficGraphData.getCurrentRangeQueueWithAverageBandwidth();
if(!queue.empty()) {
QPainterPath pIn;
paintPath(pIn, queue, boost::bind(chooseIn,_1));
painter.fillPath(pIn, QColor(0, 255, 0, 128));
painter.setPen(Qt::green);
painter.drawPath(pIn);
QPainterPath pOut;
paintPath(pOut, queue, boost::bind(chooseOut,_1));
painter.fillPath(pOut, QColor(255, 0, 0, 128));
painter.setPen(Qt::red);
painter.drawPath(pOut);
}
// draw text on top of everything else
QRect textRect = painter.boundingRect(QRect(XMARGIN, YMARGIN + h - (h * val / fMax) - yMarginText, 0, 0), Qt::AlignLeft, QString("%1 %2").arg(val).arg(units));
textRect.translate(0, -textRect.height());
painter.fillRect(textRect, Qt::black);
painter.setPen(axisCol);
painter.drawText(textRect, Qt::AlignLeft, QString("%1 %2").arg(val).arg(units));
if(fMax / val <= 3.0f) {
QRect textRect2 = painter.boundingRect(QRect(XMARGIN, YMARGIN + h - (h * val2 / fMax) - yMarginText, 0, 0), Qt::AlignLeft, QString("%1 %2").arg(val2).arg(units));
textRect2.translate(0, -textRect2.height());
painter.fillRect(textRect2, Qt::black);
painter.setPen(axisCol2);
painter.drawText(textRect2, Qt::AlignLeft, QString("%1 %2").arg(val2).arg(units));
}
}