mainwindow.cpp
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#include <qstatusbar.h>
#include <qlabel.h>
#include <qlayout.h>
#include <qevent.h>
#include <qdatetime.h>
#include <qwt_plot_canvas.h>
#include "panel.h"
#include "plot.h"
#include "mainwindow.h"
MainWindow::MainWindow(QWidget *parent):
QMainWindow(parent)
{
QWidget *w = new QWidget(this);
d_panel = new Panel(w);
d_plot = new Plot(w);
d_plot->canvas()->installEventFilter(this);
QHBoxLayout *hLayout = new QHBoxLayout(w);
hLayout->addWidget(d_panel);
hLayout->addWidget(d_plot, 10);
setCentralWidget(w);
d_frameCount = new QLabel(this);
statusBar()->addWidget(d_frameCount, 10);
d_plot->setSettings(d_panel->settings());
connect(d_panel, SIGNAL(settingsChanged(const Settings &)),
d_plot, SLOT(setSettings(const Settings &)));
}
bool MainWindow::eventFilter(QObject *object, QEvent *event)
{
if ( object == d_plot->canvas() && event->type() == QEvent::Paint )
{
static int counter;
static QTime timeStamp;
if ( !timeStamp.isValid() )
{
timeStamp.start();
counter = 0;
}
else
{
counter++;
const double elapsed = timeStamp.elapsed() / 1000.0;
if ( elapsed >= 1 )
{
QString fps;
fps.setNum(qRound(counter / elapsed));
fps += " Fps";
d_frameCount->setText(fps);
counter = 0;
timeStamp.start();
}
}
}
return QMainWindow::eventFilter(object, event);
};