问题描述
我正在使用 QFrame 创建一个圆形上下文菜单.为了制作圆角,我使用了 Qt 样式表.这是我的 CSS
I'm creating a round context menu using QFrame. To make round corner, I used Qt style sheet. Here is my CSS
this->setStyleSheet("QFrame#ShareContextMenu{background-color:rgb(255,255,255);
border-width:1px;
border-color :rgb(0,0,0);
border-radius:10px;
border-style:solid;}
QPushButton{background-color:rgba(255,255,255,0);}
QPushButton::hover{background-color:rgba(125,125,125,50); border-radius:5px;}");
如何去除这张图片中标有红色圆圈的白色背景?
How can I remove the white background marked with red circles in this picture?.
这是使用 QWidget::setMask() 的解决方案.在构造函数中添加以下代码
Here is the solution using QWidget::setMask(). Add the following codes inside constructor
QPixmap px(this->size()); //Create pixmap with the same size of current widget
px.fill(Qt::transparent); //Fill transparent
QPainter p(&px);
QBrush brush;
brush.setStyle(Qt::SolidPattern); //For fill
p.setBrush(brush);
p.drawRoundedRect(this->rect(), 15.0, 15.0); //Draw filled rounded rectangle on pixmap
this->setMask(px.mask()); //The the mask for current widget.
推荐答案
我认为您无法使用样式表解决问题.QMenu
是一个矩形的顶层小部件.
I think you cannot resolve the problem using style sheets. QMenu
is a rectangular top-level widget.
this
是你的 QMenu
吗?如果是这样,试试这个:
Is this
your QMenu
? If so, try this:
this->setWindowFlags(this->windowFlags() | Qt::FramelessWindowHint);
this->setAttribute(Qt::WA_TranslucentBackground);
用实例化的 QMenu
对象替换 this
.
Replace this
by your instantiated QMenu
object.
当然,你也可以使用 setMask 来隐藏所需的区域.例如:
Of course, you could also use setMask to hide the required region. For example:
QRegion region (menu->x(),
menu->y(),
menu->sizeHint().width(),
menu->sizeHint().height(),
QRegion::Ellipse);
menu->setMask(region);
这篇关于QFrame圆形边框透明背景的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!