Hi, I am sorry if this is a very noobish question but I have tried to create a speed-o-meter from the clock example posted somewhere on this site.

This is my code so far in that class:
Qt Code: 
  1. #include <QtGui>
  2. #include "graphview.h"
  3. #include "mainwindow.h"
  4. #include "paramwidget.h"
  5. #include "connectbar.h"
  6. #include "mapwidget.h"
  7. #include "speedometer.h"
  8.  
  9.  
  10.  
  11. SpeedoMeter::SpeedoMeter(QWidget *parent)
  12.     : QWidget(parent), mdir("messages.txt")
  13. {
  14.  
  15.  
  16.  
  17. //    QTimer *timer = new QTimer(this);
  18. //    connect(timer, SIGNAL(timeout()), this, SLOT(update()));
  19. //    timer->start(1000);
  20.  
  21.     setWindowTitle(tr("Speed-O-Meter"));
  22.     resize(200, 200);
  23. }
  24.  
  25. void SpeedoMeter::paintEvent(QPaintEvent *)
  26. {
  27.  
  28.  
  29.     GraphView*   velocity = new GraphView(mdir.getMsgInfo("VELOCITY"), mdir.getMsgInfo("UTC"));
  30.     //float velocity = _minfo->getFloat(msg);
  31.  
  32.  
  33.  
  34.  
  35.  
  36.  
  37.     static const QPoint hourHand[3] = {
  38.         QPoint(7, 8),
  39.         QPoint(-7, 8),
  40.         QPoint(0, -40)
  41.     };
  42. //    static const QPoint minuteHand[3] = {
  43. //        QPoint(7, 8),
  44. //        QPoint(-7, 8),
  45. //        QPoint(0, -70)
  46. //    };
  47.  
  48.     QColor hourColor(0, 191, 255);
  49. //    QColor minuteColor(0, 127, 127, 191);
  50.  
  51.     int side = qMin(width(), height());
  52.    // QTime time = QTime::currentTime();
  53.  
  54.     QPainter painter(this);
  55.     painter.setRenderHint(QPainter::Antialiasing);
  56.     painter.translate(width() / 2, height() / 2);
  57.     painter.scale(side / 200.0, side / 200.0);
  58.  
  59.     painter.setPen(Qt::NoPen);
  60.     painter.setBrush(hourColor);
  61.  
  62.     painter.save();
  63.     painter.rotate(12.0 * ((velocity(0))));
  64.     painter.drawConvexPolygon(hourHand, 3);
  65.     painter.restore();
  66.  
  67.     painter.setPen(hourColor);
  68.  
  69.     for (int i = 0; i < 12; ++i) {
  70.         painter.drawLine(88, 0, 96, 0);
  71.         painter.rotate(30.0);
  72.     }
  73.  
  74.     //painter.setPen(Qt::NoPen);
  75.     //painter.setBrush(minuteColor);
  76.  
  77.     //painter.save();
  78.    // painter.rotate(6.0 * (time.minute() + time.second() / 60.0));
  79.     //painter.drawConvexPolygon(minuteHand, 3);
  80.     //painter.restore();
  81.  
  82.     //painter.setPen(minuteColor);
  83.  
  84.    // for (int j = 0; j < 60; ++j) {
  85.        // if ((j % 5) != 0)
  86.          //   painter.drawLine(92, 0, 96, 0);
  87.         //painter.rotate(6.0);
  88.     //}
  89. }
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I get the following error when I try to run it 'velocity' cannot be used as a function.
but thats exactly what I want, the line
Qt Code: 
  1. GraphView*   velocity = new GraphView(mdir.getMsgInfo("VELOCITY"), mdir.getMsgInfo("UTC"));
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is used in one of my other classes to decleare a widget and then I place the widget out on my main windows and I get a value from it (speed), this value I want to use in my speedometer so that it looks like a cool analog speedometer and not just the value.

any sugestions?

thanks.