Qt设计时钟

clock.h
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#ifndef CLOCK_H
#define CLOCK_H

#include <QWidget>
#include <QPainter>
#include <QPoint>
#include <QTimer>
#include <QTime>

static QPoint sed[4]={QPoint(0,-70),QPoint(2,0),QPoint(0,10),QPoint(-2,0)};
static QPoint min[4]={QPoint(0,-60),QPoint(4,0),QPoint(0,12),QPoint(-4,0)};
static QPoint hour[4]={QPoint(0,-50),QPoint(6,0),QPoint(0,13),QPoint(-6,0)};

namespace Ui {
class Clock;
}

class Clock : public QWidget
{
Q_OBJECT

public:
explicit Clock(QWidget *parent = 0);
~Clock();
protected:
void paintEvent(QPaintEvent *);

private:
Ui::Clock *ui;
};

#endif // CLOCK_H

clock.cpp
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#include "clock.h"
#include "ui_clock.h"

Clock::Clock(QWidget *parent) :
QWidget(parent),
ui(new Ui::Clock)
{
//resize(200,200);

QTimer *timer = new QTimer(this);
timer->start(1000);
connect(timer,SIGNAL(timeout()),this,SLOT(update()));
ui->setupUi(this);
}

Clock::~Clock()
{
delete ui;
}

void Clock::paintEvent(QPaintEvent *)
{
QPainter paint(this);
QTime time = QTime::currentTime();
paint.translate(100,100);
paint.setRenderHint(QPainter::Antialiasing);
paint.setBrush(Qt::red);
paint.setPen(Qt::red);
paint.save();
paint.rotate(6.0*time.second());
paint.drawConvexPolygon(sed,4);
paint.restore();

paint.setBrush(Qt::blue);
paint.setPen(Qt::blue);
paint.save();
paint.rotate(6.0*time.minute()+time.second()/60.0);
paint.drawConvexPolygon(min,4);
paint.restore();

paint.setBrush(Qt::black);
paint.setPen(Qt::black);
paint.save();
paint.rotate(30.0*time.hour()+time.minute()/60.0);
paint.drawConvexPolygon(hour,4);
paint.restore();

for(int i = 0; i < 12; i++)
{
paint.rotate(30);
paint.drawLine(0,-88,0,-98);
}
}

main.cpp
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#include <QtGui/<
4000
span class="hljs-type">QApplication>
#include "clock.h"

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Clock w;
w.show();

return a.exec();
}