Qt自定义组合按钮,实现相机拍照,光学变焦

效果如下:

 

核心代码:

void CameraButton::paintEvent(QPaintEvent *) { QPainter painter(this); m_arcPathList.clear(); initializeInterface(); painter.setRenderHint(QPainter::Antialiasing); painter.translate(width()/2, height()/2); QRect blueRect(0, 0, this->width()-10, this->height()-10); blueRect.moveCenter(QPoint(0, 0)); painter.setPen(colorLine); painter.setBrush(colorLine); painter.drawEllipse(blueRect); painter.setPen(Qt::NoPen); QLinearGradient lgUp; QRect pprect = m_arcPathList.at(0).boundingRect().toRect(); lgUp.setStart(pprect.topLeft()); lgUp.setFinalStop(pprect.bottomLeft()); painter.translate(0, -5); if(m_pressIndex == 0) { lgUp.setColorAt(0, colorSectorUpPress); lgUp.setColorAt(1, colorSectorDownPress); painter.setBrush(lgUp); painter.drawPath(m_arcPathList.at(0)); painter.drawPixmap(m_arcPathList.at(0).controlPointRect().center().x()-23, m_arcPathList.at(0).controlPointRect().center().y()-20,mPixmapUpPress); }else{ lgUp.setColorAt(0, colorSectorUpNormal); lgUp.setColorAt(1, colorSectorDownNormal); painter.setBrush(lgUp); painter.drawPath(m_arcPathList.at(0)); painter.drawPixmap(m_arcPathList.at(0).controlPointRect().center().x()-23, m_arcPathList.at(0).controlPointRect().center().y()-20,mPixmapUpNormal); } painter.translate(0, 5); QLinearGradient lgDown; pprect = m_arcPathList.at(1).boundingRect().toRect(); lgDown.setStart(pprect.topLeft()); lgDown.setFinalStop(pprect.bottomLeft()); painter.translate(0, 5); if(m_pressIndex == 1){ lgDown.setColorAt(0, colorSectorUpPress); lgDown.setColorAt(1, colorSectorDownPress); painter.setBrush(lgDown); painter.drawPath(m_arcPathList.at(1)); painter.drawPixmap(m_arcPathList.at(1).controlPointRect().center().x()-23, m_arcPathList.at(1).controlPointRect().center().y()-20,mPixmapDownPress); }else{ lgDown.setColorAt(0, colorSectorUpNormal); lgDown.setColorAt(1, colorSectorDownNormal); painter.setBrush(lgDown); painter.drawPath(m_arcPathList.at(1)); painter.drawPixmap(m_arcPathList.at(1).controlPointRect().center().x()-23, m_arcPathList.at(1).controlPointRect().center().y()-20,mPixmapDownNormal); } painter.translate(0, -5); QLinearGradient lgLeft; pprect = m_arcPathList.at(2).boundingRect().toRect(); lgLeft.setStart(pprect.topLeft()); lgLeft.setFinalStop(pprect.bottomLeft()); painter.translate(-5,0); if(m_pressIndex == 2){ lgLeft.setColorAt(0, colorSectorUpPress); lgLeft.setColorAt(1, colorSectorDownPress); painter.setBrush(lgLeft); painter.drawPath(m_arcPathList.at(2)); painter.drawPixmap(m_arcPathList.at(2).controlPointRect().center().x()-89, m_arcPathList.at(2).controlPointRect().center().y()-20,mPixmapLeftPress); }else{ lgLeft.setColorAt(0, colorSectorUpNormal); lgLeft.setColorAt(1, colorSectorDownNormal); painter.setBrush(lgLeft); painter.drawPath(m_arcPathList.at(2)); painter.drawPixmap(m_arcPathList.at(2).controlPointRect().center().x()-89, m_arcPathList.at(2).controlPointRect().center().y()-20,mPixmapLeftNormal); } painter.translate(5, 0); QLinearGradient lgRight; pprect = m_arcPathList.at(3).boundingRect().toRect(); lgRight.setStart(pprect.topLeft()); lgRight.setFinalStop(pprect.bottomLeft()); painter.translate(5, 0); if(m_pressIndex == 3){ lgRight.setColorAt(0, colorSectorUpPress); lgRight.setColorAt(1, colorSectorDownPress); painter.setBrush(lgRight); painter.drawPath(m_arcPathList.at(3)); painter.drawPixmap(m_arcPathList.at(3).boundingRect().center().x()+43, m_arcPathList.at(3).boundingRect().center().y()-20,mPixmapRightPress); }else{ lgRight.setColorAt(0, colorSectorUpNormal); lgRight.setColorAt(1, colorSectorDownNormal); painter.setBrush(lgRight); painter.drawPath(m_arcPathList.at(3)); painter.drawPixmap(m_arcPathList.at(3).boundingRect().center().x()+43, m_arcPathList.at(3).boundingRect().center().y()-20,mPixmapRightNormal); } painter.translate(-5, 0); QRect ppcenterBtnRect = m_arcPathList.at(4).boundingRect().toRect(); QLinearGradient lgCenter; lgCenter.setStart(ppcenterBtnRect.topLeft()); lgCenter.setFinalStop(ppcenterBtnRect.bottomLeft()); if(m_pressIndex == 4){ lgCenter.setColorAt(0, colorSectorUpPress); lgCenter.setColorAt(1, colorSectorDownPress); painter.setBrush(lgCenter); painter.drawPath(m_arcPathList.at(4)); painter.drawPixmap(m_arcPathList.at(4).controlPointRect().center().x()-30, m_arcPathList.at(4).controlPointRect().center().y()-25,mPixmapCenterPress); }else{ lgCenter.setColorAt(0, colorSectorUpNormal); lgCenter.setColorAt(1, colorSectorDownNormal); painter.setBrush(lgCenter); painter.drawPath(m_arcPathList.at(4)); painter.drawPixmap(m_arcPathList.at(4).controlPointRect().center().x()-30, m_arcPathList.at(4).controlPointRect().center().y()-25,mPixmapCenterNormal); } } void CameraButton::setWidgetStyle(QString style) { if(style == "dark"){ colorLine = QColor(27,126,179); colorSectorUpPress = QColor(219,219,219); colorSectorDownPress = QColor(235,235,235); colorSectorUpNormal = QColor(58,58,58); colorSectorDownNormal = QColor(26,26,26); }else{ colorLine = QColor(53,193,229); colorSectorUpPress = QColor(217,217,217); colorSectorDownPress = QColor(235,235,235); colorSectorUpNormal = QColor(240,243,248); colorSectorDownNormal = QColor(178,184,194); } update(); }

完整代码:https://download.csdn.net/download/yu_20501253/11192951