Qt自定義組合按鈕,實現相機拍照,光學變焦

效果如下:

 

核心代碼:

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();
}

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