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#include <QtGui>
#include "plotwidget.h"
#include "qkineticscroller.h"
PlotWidget::PlotWidget(QKineticScroller *scroller)
: QWidget(), m_scroller(scroller)
{
setWindowTitle(QLatin1String("Plot"));
m_scroller->registerDebugHook(debugHook, this);
m_clear = new QPushButton(QLatin1String("Clear"), this);
connect(m_clear, SIGNAL(clicked()), this, SLOT(reset()));
m_legend = new QLabel(QLatin1String("Legend"), this);
QString tooltip;
QTextStream ts(&tooltip);
ts << "<table border=\"0\">";
ts << "<tr><td width=\"30\" bgcolor=\"" << QColor(Qt::red).dark().name() << "\" /><td>releaseVelocity X</td></tr>";
ts << "<tr><td width=\"30\" bgcolor=\"" << QColor(Qt::red).light().name() << "\" /><td>releaseVelocity Y</td></tr>";
ts << "<tr><td width=\"30\" bgcolor=\"" << QColor(Qt::green).dark().name() << "\" /><td>Content Position X</td></tr>";
ts << "<tr><td width=\"30\" bgcolor=\"" << QColor(Qt::green).light().name() << "\" /><td>Content Position Y</td></tr>";
ts << "<tr><td width=\"30\" bgcolor=\"" << QColor(Qt::blue).dark().name() << "\" /><td>Overshoot Position X</td></tr>";
ts << "<tr><td width=\"30\" bgcolor=\"" << QColor(Qt::blue).light().name() << "\" /><td>Overshoot Position Y</td></tr>";
ts << "</table>";
m_legend->setToolTip(tooltip);
}
void PlotWidget::debugHook(void *user, const QPointF &releaseVelocity, const QPointF &contentPosition, const QPointF &overshootPosition)
{
PlotItem pi = { releaseVelocity, contentPosition, overshootPosition };
static_cast<PlotWidget *>(user)->addPlotItem(pi);
}
static inline void doMaxMin(const QPointF &v, qreal &minmaxv)
{
minmaxv = qMax(minmaxv, qMax(qAbs(v.x()), qAbs(v.y())));
}
void PlotWidget::addPlotItem(const PlotItem &pi)
{
m_plotitems.append(pi);
minMaxVelocity = minMaxPosition = 0;
while (m_plotitems.size() > 500)
m_plotitems.removeFirst();
foreach (const PlotItem &pi, m_plotitems) {
doMaxMin(pi.releaseVelocity, minMaxVelocity);
doMaxMin(pi.contentPosition, minMaxPosition);
doMaxMin(pi.overshootPosition, minMaxPosition);
}
update();
}
void PlotWidget::reset()
{
m_plotitems.clear();
minMaxVelocity = minMaxPosition = 0;
update();
}
void PlotWidget::resizeEvent(QResizeEvent *)
{
QSize cs = m_clear->sizeHint();
QSize ls = m_legend->sizeHint();
m_clear->setGeometry(4, 4, cs.width(), cs.height());
m_legend->setGeometry(4, height() - ls.height() - 4, ls.width(), ls.height());
}
void PlotWidget::paintEvent(QPaintEvent *)
{
#define SCALE(v, mm) ((qreal(1) - (v / mm)) * qreal(0.5) * height())
QColor rvColor = Qt::red;
QColor cpColor = Qt::green;
QColor opColor = Qt::blue;
QPainter p(this);
p.setRenderHints(QPainter::Antialiasing);
p.fillRect(rect(), Qt::white);
if (m_plotitems.isEmpty())
return;
int x = 2;
int offset = m_plotitems.size() - width() / 2;
QList<PlotItem>::const_iterator it = m_plotitems.constBegin();
if (offset > 0)
it += (offset - 1);
// PlotItem &last = const_cast<PlotItem &>(*it++);
// PlotItem dummy;
const PlotItem *last = &(*it++);
// last = *it++;
// qWarning() << "lastOp[0].y = " << last.overshootPosition.y() << m_plotitems.at(1).overshootPosition.y();
while (it != m_plotitems.constEnd()) {
p.setPen(rvColor.light());
p.drawLine(qreal(x - 2), SCALE(last->releaseVelocity.x(), minMaxVelocity),
qreal(x), SCALE(it->releaseVelocity.x(), minMaxVelocity));
p.setPen(rvColor.dark());
p.drawLine(qreal(x - 2), SCALE(last->releaseVelocity.y(), minMaxVelocity),
qreal(x), SCALE(it->releaseVelocity.y(), minMaxVelocity));
p.setPen(cpColor.light());
p.drawLine(qreal(x - 2), SCALE(last->contentPosition.x(), minMaxPosition),
qreal(x), SCALE(it->contentPosition.x(), minMaxPosition));
p.setPen(cpColor.dark());
p.drawLine(qreal(x - 2), SCALE(last->contentPosition.y(), minMaxPosition),
qreal(x), SCALE(it->contentPosition.y(), minMaxPosition));
p.setPen(opColor.light());
p.drawLine(qreal(x - 2), SCALE(last->overshootPosition.x(), minMaxPosition),
qreal(x), SCALE(it->overshootPosition.x(), minMaxPosition));
p.setPen(opColor.dark());
p.drawLine(qreal(x - 2), SCALE(last->overshootPosition.y(), minMaxPosition),
qreal(x), SCALE(it->overshootPosition.y(), minMaxPosition));
last = &(*it++);
x += 2;
}
#undef SCALE
}
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