QGroupBox样式表使用

一、设置border后标题下沉

解决方法：通过设置样式表

QGroupBox
{
border: 2px solid red;
border-radius:5px;
margin-top:2ex;//文字在方框中位置的偏离度
font-family:楷体;
font:bold 28px;

}

QGroupBox::title
{
subcontrol-origin:margin;
subcontrol-position:top center;
padding:0 3px;
}

其实能改变title下沉就 margin-top和padding。

二、设置子项样式：

边框色、选项高度、下拉按钮图标

 network_type->setStyleSheet("QComboBox{border:1px solid gray;}"
  "QComboBox QAbstractItemView::item{height:20px;}" //下拉选项高度 设置的下拉项的样式
  "QComboBox::down-arrow{image:url(:/icon/arrowdown);}" //下拉箭头
  "QComboBox::drop-down{border:0px;}"); //下拉按钮

QComboBox {
    border: 1px solid gray;
    border-radius: 3px;
    padding: 1px 18px 1px 3px;
    min-width: 6em;
}
 
QComboBox:editable {
    background: white;
}
 
QComboBox:!editable, QComboBox::drop-down:editable {
     background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1,
                                 stop: 0 #E1E1E1, stop: 0.4 #DDDDDD,
                                 stop: 0.5 #D8D8D8, stop: 1.0 #D3D3D3);
}
 
/* QComboBox gets the "on" state when the popup is open */
QComboBox:!editable:on, QComboBox::drop-down:editable:on {
    background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1,
                                stop: 0 #D3D3D3, stop: 0.4 #D8D8D8,
                                stop: 0.5 #DDDDDD, stop: 1.0 #E1E1E1);
}
 
QComboBox:on { /* shift the text when the popup opens */
    padding-top: 3px;
    padding-left: 4px;
}
 
QComboBox::drop-down {
    subcontrol-origin: padding;
    subcontrol-position: top right;
    width: 15px;
 
    border-left-width: 1px;
    border-left-color: darkgray;
    border-left-style: solid; /* just a single line */
    border-top-right-radius: 3px; /* same radius as the QComboBox */
    border-bottom-right-radius: 3px;
}
 
QComboBox::down-arrow {
    image: url(/usr/share/icons/crystalsvg/16x16/actions/1downarrow.png);
}
 
QComboBox::down-arrow:on { /* shift the arrow when popup is open */
    top: 1px;
    left: 1px;
}