QSlider 样式

 https://doc.qt.io/archives/qt-4.8/stylesheet-examples.html

#if 0
    m_sliderVoice->setStyleSheet("
                QSlider::groove:vertical {
                border: 1px solid #4A708B;
                background: #C0C0C0;
                 50px;
                border-radius: 1px;
                padding-left:-1px;
                padding-right:-1px;
                padding-top:-1px;
                padding-bottom:-1px;
                }
                
                QSlider::sub-page:vertical {
                background: #575757;
                border: 1px solid #4A708B;
                border-radius: 2px;
                }
                
                QSlider::add-page:vertical {
                background: qlineargradient(x1:0, y1:0, x2:0, y2:1, 
                    stop:0 #c4c4c4, stop:1 #B1B1B1);
                background: qlineargradient(x1: 0, y1: 0.2, x2: 1, y2: 1,
                    stop: 0 #5DCCFF, stop: 1 #1874CD);
                border: 0px solid #777;
                 10px;
                border-radius: 2px;
                }
                
                QSlider::handle:vertical 
                {
                    background: qradialgradient(spread:pad, cx:0.5, cy:0.5, "
                                     "radius:0.5, fx:0.5, fy:0.5, stop:0.6 #45ADED, 
                <span>    </span>stop:0.778409 rgba(255, 255, 255, 0));
                
                    height: 100px;
                    margin-left: -30px;
                    margin-right: 30px;
                    border-radius: 5px;
                }"
                                );
#else
    m_sliderVoice->setStyleSheet("
                QSlider::groove
                {
                   background-color: grey;
                    50px;
                }
                QSlider::handle
                {
                    background-color:#05B8CC;
                    border: 3px solid #05B8CC;
                    height: 50px;
                } 
                QSlider::sub-page
                {
                    background-color:grey;
                }
                QSlider::add-page
                {
                    background-color:white;
                }
                ");
#endif