如何将QAction设置为在QToolBar中具有透明背景

Question

创建 QToolBar 后，我用图标向其添加 QAction，但是当我设置 QToolBar StyleSheet 时，QAction 将具有白色背景而不是透明背景，如下图所示

代码：

QToolBar *toolBarFile = addToolBar("File");
toolBarFile->setMinimumWidth(70);
this->addToolBar(Qt::LeftToolBarArea, toolBarFile);
toolBarFile->setMovable(false);
toolBarFile->setStyleSheet("*{border: none;}"
                           "QToolBar{background-color: qlineargradient(x1: 0, y1: 0, x2: 1, y2: 0, stop: 0 #f2f2f2, stop: 0.8 #f2f2f2, stop: 1 #999999);}");

QAction* ActionUniversal = new QAction(QIcon(":/DownArrow.png"), "&Open", this);
toolBarFile->addAction(ActionUniversal);

ActionUniversal = new QAction(QIcon(":/DownArrow.png"), "&Open", this);
toolBarFile->addAction(ActionUniversal);

ActionUniversal = new QAction(QIcon(":/DownArrow.png"), "&Open", this);
toolBarFile->addAction(ActionUniversal);

ActionUniversal = new QAction(QIcon(":/DownArrow.png"), "&Open", this);
toolBarFile->addAction(ActionUniversal);

显示图像背景透明度的另一个示例：

我的代码发生了什么变化：

toolBarFile->setStyleSheet("border: none;"
                               "background-color: qlineargradient(x1: 0, y1: 0, x2: 1, y2: 0, stop: 0 #f2f2f2, stop: 0.8 #f2f2f2, stop: 1 #999999);");

Answer 1

试试这个：

toolBarFile->setStyleSheet("QToolButton{border: none; background-color: transparent;} "
                           "QToolBar{background-color: qlineargradient(x1: 0, y1: 0, x2: 1, y2: 0, stop: 0 #f2f2f2, stop: 0.8 #f2f2f2, stop: 1 #999999);}");

如何将QAction设置为在QToolBar中具有透明背景

How to set QAction to have transparent background inside QToolBar

qt