qt 实现钟表图标

标签：

1. #include "clock.h"
3. CLOCK::CLOCK(QWidget *parent)
4.     : QWidget(parent)
5. {
6.     QTimer *timer = new QTimer(this);
7.     timer->start(1000);//一秒钟
8.     connect(timer,SIGNAL(timeout()),this,SLOT(update()));
10.     QFont font;
11.     font.setPointSize(10);//字体大小设置为10
12.     setFont(font);
13. }
15. CLOCK::~CLOCK()
16. {
18. }
20. void CLOCK::paintEvent(QPaintEvent * /* event */)
21. {
22.     QPainter painter(this);
23.     painter.setRenderHint(QPainter::Antialiasing, true);
25.     int side = qMin(width(), height());
27.     painter.setViewport((width() - side) / 2, (height() - side) / 2,
28.                         side, side);
29.     painter.setWindow(0, 0, 200, 200);/*设置(0，0)为新的坐标原点*/
31.     draw(&painter);
32. }
34. void CLOCK::draw(QPainter *painter)
35. {
36.     QPen thickPen(palette().foreground(), 1.5);//设置刻度线为粗黑
37.     QPen thinPen(palette().foreground(), 0.5);//设置刻度线为灰
39.     QTime time = QTime::currentTime();
40.     painter->translate(100,100);//重新设定坐标原点
42.     painter->setRenderHint(QPainter::Antialiasing);//消锯齿
43.     painter->setBrush(Qt::red);
44.     painter->setPen(Qt::red);
45.     painter->save();//保存坐标系，防止坐标系跑偏了
46.     painter->rotate(6.0*time.second());//注意是6.0，不是6
47.     painter->drawConvexPolygon(sed,4);
48.     painter->restore();//复位之前的坐标系
50.     painter->setBrush(Qt::blue);
51.     painter->setPen(Qt::blue);
52.     painter->save();
53.     painter->rotate(6.0*(time.minute()+time.second()/60.0));
54.     painter->drawConvexPolygon(min,4);
55.     painter->restore();
57.     painter->setBrush(Qt::black);
58.     painter->setPen(Qt::black);
59.     painter->save();
60.     painter->rotate(30.0*(time.hour()+time.minute()/60.0));
61.     painter->drawConvexPolygon(hour,4);
62.     painter->restore();
64. // //painter->drawLine(0,-98,0,-88);
65. // for(int i=0;i<12;i++)
66. // {
67. // painter->rotate(30);//坐标轴旋转30度
68. // painter->drawLine(0,-98,0,-88);
69. // }
70.     /*画刻度还有数字*/
71.     for (int i = 1; i <=60; ++i) {
72.         painter->save();
73.         painter->rotate(6*i);//坐标轴旋转6度
74.         if (i % 5 == 0) {
75.             painter->setPen(thickPen);
76.             painter->drawLine(0, -98, 0, -82);
77.             painter->drawText(-20, -82, 40, 40,
78.                               Qt::AlignHCenter | Qt::AlignTop,
79.                               QString::number(i/5));
80.         } else {
81.             painter->setPen(thinPen);
82.             painter->drawLine(0, -98, 0, -88);
83.         }
84.         //painter->rotate(-DegreesPerMinute);
85.         painter->restore();
86.     }
87. }

qt 实现钟表图标

标签：

原文地址：http://www.cnblogs.com/lvdongjie/p/4494388.html