Qt 設置按鈕透明、圖標、移動到按鈕和狀態欄提示等各種屬性

QPushButton *leftToRightBtn = new QPushButton;
    leftToRightBtn->setToolTip(tr("Transfer File(s) from Left to Right"));
    leftToRightBtn->setFlat(true);
    leftToRightBtn->setIcon(QIcon(":/images/rightarrow.png"));
    leftToRightBtn->setStatusTip(tr("Transfer File(s) from Left to Right"));