Qt QWidget控件透明動畫實現

QWidget控件透明動畫實現

要做子控件透明需要用到QGraphicsOpacityEffect類

使用例子如下代碼:

QGraphicsOpacityEffect * m_pGraphicsOpacityEffect1;
QPropertyAnimation * m_pOpacityAnimation1;
 
m_pGraphicsOpacityEffect1 = new QGraphicsOpacityEffect(m_pHomeBtn);
m_pGraphicsOpacityEffect1->setOpacity(1.0);
m_pHomeBtn->setGraphicsEffect(m_pGraphicsOpacityEffect1);
 
m_pOpacityAnimation1 = new QPropertyAnimation(m_pGraphicsOpacityEffect1,"opacity",this);
m_pOpacityAnimation1->setDuration(m_nDuring);
m_pOpacityAnimation1->setStartValue(0);
m_pOpacityAnimation1->setEndValue(1.0);
m_pOpacityAnimation1->start();

QPropertyAnimation調用start可以設置 動畫完成后自動delete