这是本人参照网上的资料,然后稍作修改,完善了的时钟界面,界面如下。
功能比较简单,主要是读取当前主机的时间,然后显示,可随意放大缩小。
附源码:
- #include "clock.h"
- CLOCK::CLOCK(QWidget *parent)
- : QWidget(parent)
- {
- QTimer *timer = new QTimer(this);
- timer->start(1000);//一秒钟
- connect(timer,SIGNAL(timeout()),this,SLOT(update()));
- QFont font;
- font.setPointSize(10);//字体大小设置为10
- setFont(font);
- }
- CLOCK::~CLOCK()
- {
- }
- void CLOCK::paintEvent(QPaintEvent * /* event */)
- {
- QPainter painter(this);
- painter.setRenderHint(QPainter::Antialiasing, true);
- int side = qMin(width(), height());
- painter.setViewport((width() - side) / 2, (height() - side) / 2,
- side, side);
- painter.setWindow(0, 0, 200, 200);/*设置(0,0)为新的坐标原点*/
- draw(&painter);
- }
- void CLOCK::draw(QPainter *painter)
- {
- QPen thickPen(palette().foreground(), 1.5);//设置刻度线为粗黑
- QPen thinPen(palette().foreground(), 0.5);//设置刻度线为灰
- QTime time = QTime::currentTime();
- painter->translate(100,100);//重新设定坐标原点
- painter->setRenderHint(QPainter::Antialiasing);//消锯齿
- painter->setBrush(Qt::red);
- painter->setPen(Qt::red);
- painter->save();//保存坐标系,防止坐标系跑偏了
- painter->rotate(6.0*time.second());//注意是6.0,不是6
- painter->drawConvexPolygon(sed,4);
- painter->restore();//复位之前的坐标系
- painter->setBrush(Qt::blue);
- painter->setPen(Qt::blue);
- painter->save();
- painter->rotate(6.0*(time.minute()+time.second()/60.0));
- painter->drawConvexPolygon(min,4);
- painter->restore();
- painter->setBrush(Qt::black);
- painter->setPen(Qt::black);
- painter->save();
- painter->rotate(30.0*(time.hour()+time.minute()/60.0));
- painter->drawConvexPolygon(hour,4);
- painter->restore();
- // //painter->drawLine(0,-98,0,-88);
- // for(int i=0;i<12;i++)
- // {
- // painter->rotate(30);//坐标轴旋转30度
- // painter->drawLine(0,-98,0,-88);
- // }
- /*画刻度还有数字*/
- for (int i = 1; i <=60; ++i) {
- painter->save();
- painter->rotate(6*i);//坐标轴旋转6度
- if (i % 5 == 0) {
- painter->setPen(thickPen);
- painter->drawLine(0, -98, 0, -82);
- painter->drawText(-20, -82, 40, 40,
- Qt::AlignHCenter | Qt::AlignTop,
- QString::number(i/5));
- } else {
- painter->setPen(thinPen);
- painter->drawLine(0, -98, 0, -88);
- }
- //painter->rotate(-DegreesPerMinute);
- painter->restore();
- }
- }
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