TestPainter.rar

QPainter应用实例复古计时器旋钮源码： 如下:通过重载 void OvenTimer::paintEvent(QPaintEvent *event) 事件,实现如上的旋钮绘制: void OvenTimer::draw(QPainter *p) { static const int t[3][2] = {{-2, -49}, {+2, -49}, {0, -47}};   QPen tckP(palette().foreground(), 1.5); QPen tinPen(palette().foreground(), 0.5); QColor nice(150,150,200);   p->setPen(tinPen); p->setBrush(palette().foreground()); p->drawPolygon(QPolygon(3, &t[0][0]));   QConicalGradient c(0,0,-90.0); c.setColorAt(0.0,Qt::darkGray); c.setColorAt(0.2,nice); c.setColorAt(0.5,Qt::white); c.setColorAt(1.0,Qt::darkGray);   p->setBrush(c); p->drawEllipse(-46,-46,92,92);   QRadialGradient h(0,0,20,0,0); h.setColorAt(0.0,Qt::lightGray); h.setColorAt(0.2,Qt::darkGray); h.setColorAt(0.5,Qt::white); h.setColorAt(1.0,Qt::black);   p->setPen(Qt::NoPen); p->setBrush(h); p->drawEllipse(-20,-20,40,40);   QLinearGradient k(-7,-25,7,-25); k.setColorAt(0.0,Qt::black); k.setColorAt(0.2,nice); k.setColorAt(0.3,Qt::lightGray); k.setColorAt(0.8,Qt::white); k.setColorAt(1.0,Qt::black);   p->rotate(duration() * DegreesPerSecond); p->setBrush(k); p->setPen(tinPen); p->drawRoundRect(-7,-25,14,50,90,49);     for(int i = 0; i <= MaxMinutes; i++) { if(i % 5 == 0) { p->setPen(tckP); p->drawLine(0, -41, 0, -44); p->drawText(-15, -41,30,30, Qt::AlignHCenter|Qt::AlignTop, QString::number(i)); } else { p->setPen(tinPen); p->drawLine(0,-42, 0, -44); }   p->rotate(-DegreesPerMinute); } } void OvenTimer::paintEvent(QPaintEvent *event) { Q_UNUSED(event); QPainter p(this); p.setRenderHint(QPainter::Antialiasing, true); int side = qMin(width(), height()); p.setViewport((width() - side) / 2, (height() - side)/2, side, side); p.setWindow(-50,-50,100,100); draw(&p); } 需要实现源码,请留言!