analogclock.cpp

qt4 模拟时钟。也没什么好描述的

#include <QtGui>
#include "analogclock.h"

AnalogClock::AnalogClock(QWidget *parent)
:QWidget(parent)
{
	QTimer *timer=new QTimer(this);  //开启定时器
	connect(timer,SIGNAL(timeout()),this,SLOT(update())); //连接到更新
	timer->start(1000);  //定时器计时1000下产生timeout()
	setWindowTitle(tr("Analog Clock"));//标题
	resize(200,200);//大小
}

void AnalogClock::paintEvent(QPaintEvent *)
{
	static const QPoint hourHand[3]={
	QPoint(7,8),
	QPoint(-7,8),
	QPoint(0,-40)
};//时钟指针三角形三个顶点

	static const QPoint minuteHand[3]={
	QPoint(7,8),
	QPoint(-7,8),
	QPoint(0,-40)
};//分针

//modified here
	static const QPoint secondHand[2]={
	QPoint(0,8),
	QPoint(0,-50)
};//加入线形秒针
//end

QColor hourColor(127,0,127);
QColor minuteColor(0,127,127);

//modified
QColor secondColor(127,127,0);//加入秒针颜色
//end

int side=qMin(width(),height());
QTime time=QTime::currentTime();
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing);
painter.translate(width() / 2, height() / 2);
painter.scale(side / 200.0, side / 200.0);

painter.setPen(Qt::NoPen);
painter.setBrush(hourColor);
painter.save();
painter.rotate(30.0 * ((time.hour() + time.minute() / 60.0)));
painter.drawConvexPolygon(hourHand, 3);
painter.restore();
painter.setPen(hourColor);
for (int i = 0; i < 12; ++i) {
painter.drawLine(88, 0, 96, 0);
painter.rotate(30.0);
}

painter.setPen(Qt::NoPen);
painter.setBrush(minuteColor);
painter.save();
painter.rotate(6.0 * (time.minute() + time.second() / 60.0));
painter.drawConvexPolygon(minuteHand, 3);
painter.restore();
painter.setPen(minuteColor);
for (int j = 0; j < 60; ++j) {
if ((j % 5) != 0)
painter.drawLine(92, 0, 96, 0);
painter.rotate(6.0);
}

//modified
painter.setPen(secondColor);
//painter.setPen(Qt::NoPen);
//painter.setBrush(secondColor);
painter.save();
painter.rotate(6.0 * (time.second()));
painter.drawLine(secondHand[0],secondHand[1]);

//painter.drawConvexPolygon(hourHand, 3);
painter.restore();

/*for (int i = 0; i < 12; ++i) {
painter.drawLine(88, 0, 96, 0);
painter.rotate(30.0);
}
*/


//end
}