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#include <iostream>
#include <fstream>
#ifdef QWT_QTOPIA
#include <qpe/qpeapplication.h>
#endif
#include <qapplication.h>
#include <qfont.h>
#include <qlabel.h>
#include <qwt_thermo.h>
#include <qwt_math.h>
class MainWin : public QWidget
{
public:
MainWin();
~MainWin();
void start();
void update();
protected:
void timerEvent(QTimerEvent *e);
private:
enum {MemUsed, MemShared, MemBuffers, MemCached, SwapUsed, ThermoCnt };
QwtThermo *th[ThermoCnt];
QLabel *lb[ThermoCnt];
int tmrID;
};
void MainWin::start()
{
update();
tmrID = startTimer(2000);
}
void MainWin::update()
{
double mtotal, mused, mcached, mshared, mbuffers, mfree;
double stotal, sused, sfree;
static char buffer[81];
QString text;
std::ifstream inp("/proc/meminfo");
inp.getline(buffer, 80);
inp >> buffer >> mtotal >> mused >> mfree >> mshared >> mbuffers
>> mcached;
inp >> buffer >> stotal >> sused >> sfree;
mtotal *= 0.01;
stotal *= 0.01;
mused /= mtotal;
mshared /= mtotal;
mbuffers /= mtotal;
mcached /= mtotal;
sused /= stotal;
// set values
th[MemUsed]->setValue(mused);
th[MemShared]->setValue(mshared);
th[MemBuffers]->setValue(mbuffers);
th[MemCached]->setValue(mcached);
th[SwapUsed]->setValue(sused);
text.setNum(mused, 'g', 3);
text = QString("Used: ") + text + QString(" %");
lb[MemUsed]->setText(text);
text.setNum(mshared, 'g', 3);
text = QString("Shared: ") + text + QString(" %");
lb[MemShared]->setText(text);
text.setNum(mbuffers, 'g', 3);
text = QString("Buffers: ") + text + QString(" %");
lb[MemBuffers]->setText(text);
text.setNum(mcached, 'g', 3);
text = QString("Cache: ") + text + QString(" %");
lb[MemCached]->setText(text);
text.setNum(sused, 'g', 3);
text = QString("Swap Used: ") + text + QString(" %");
lb[SwapUsed]->setText(text);
}
void MainWin::timerEvent(QTimerEvent *)
{
update();
}
MainWin::MainWin():
QWidget()
{
int i;
QFont fnThermo("Helvetica", 8);
QFont fnLabel("Helvetica", 10);
QColor cFill("DarkMagenta");
//
// initialize members
//
tmrID = 0;
//
// create widgets
//
for(i=0;i<ThermoCnt;i++)
th[i] = new QwtThermo(this,"");
lb[MemUsed] = new QLabel("Used",this);
lb[MemShared] = new QLabel("Shared",this);
lb[MemCached] = new QLabel("Cache",this);
lb[MemBuffers] = new QLabel("Buffers",this);
lb[SwapUsed] = new QLabel("Swap Used",this);
//
// place widgets
//
for (i=0; i<ThermoCnt; i++)
{
lb[i]->setGeometry(0,i*65,130,20);
th[i]->setGeometry(0,20 + i * 65 ,130,45);
}
//
// configure thermometers
//
for (i=0;i<ThermoCnt;i++)
{
th[i]->setOrientation(Qt::Horizontal, QwtThermo::Bottom);
th[i]->setRange(0.0,100.0);
th[i]->setValue(0.0);
th[i]->setFont(fnThermo);
th[i]->setPipeWidth(6);
th[i]->setScaleMaxMajor(6);
th[i]->setScaleMaxMinor(5);
th[i]->setMargin(10);
th[i]->setFillColor(cFill);
}
//
// configure labels
//
for (i=0;i<ThermoCnt;i++)
{
lb[i]->setFont(fnLabel);
lb[i]->setAlignment(Qt::AlignCenter);
}
setCaption("Memory Usage");
setFixedSize(130,325);
}
MainWin::~MainWin()
{
for(int i=0;i<ThermoCnt;i++)
{
delete th[i];
delete lb[i];
}
if (tmrID != 0)
killTimer(tmrID);
}
int main (int argc, char **argv)
{
#ifdef QWT_QTOPIA
QPEApplication a(argc, argv);
#else
QApplication a(argc, argv);
#endif
MainWin w;
w.resize(180,140);
a.setMainWidget(&w);
w.start();
w.show();
return a.exec();
}
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