QT修改默认的滚动条样式

这几天写一个类似于悬浮窗的小程序，可是qt自带的滚动条实在难看，经过多番查找终于找到一个类似于qq聊天窗口的滚动条，废话不说上代码。希望能帮到大家

1.写入到文件中，新建个xx.qss，然后复制一下内容：

// 设置垂直滚动条基本样式

QScrollBar:vertical

{

    width:8px;

    background:rgba(0,0,0,0%);

    margin:0px,0px,0px,0px;

    padding-top:9px;   // 留出9px给上面和下面的箭头

    padding-bottom:9px;

}

QScrollBar::handle:vertical

{

    width:8px;

    background:rgba(0,0,0,25%);

    border-radius:4px;   // 滚动条两端变成椭圆

    min-height:20;

}

QScrollBar::handle:vertical:hover

{

    width:8px;

    background:rgba(0,0,0,50%);   // 鼠标放到滚动条上的时候，颜色变深

    border-radius:4px;

    min-height:20;

}

QScrollBar::add-line:vertical   // 这个应该是设置下箭头的，3.png就是箭头

{

    height:9px;width:8px;

    border-image:url(:/images/a/3.png);

    subcontrol-position:bottom;

}

QScrollBar::sub-line:vertical   // 设置上箭头

{

    height:9px;width:8px;

    border-image:url(:/images/a/1.png);

    subcontrol-position:top;

}

QScrollBar::add-line:vertical:hover   // 当鼠标放到下箭头上的时候

{

    height:9px;width:8px;

    border-image:url(:/images/a/4.png);

    subcontrol-position:bottom;

}

QScrollBar::sub-line:vertical:hover  // 当鼠标放到下箭头上的时候

{

    height:9px;width:8px;

    border-image:url(:/images/a/2.png);

    subcontrol-position:top;

}

QScrollBar::add-page:vertical,QScrollBar::sub-page:vertical   // 当滚动条滚动的时候，上面的部分和下面的部分

{

    background:rgba(0,0,0,10%);

    border-radius:4px;

}

接着在程序中读取文件：

QFile file(":/scrollbar.qss");

file.open(QFile::ReadOnly);

listWidget->verticalScrollBar()->setStyleSheet(file.readAll());

2.直接在程序中设置，简单

listWidget->verticalScrollBar()->setStyleSheet("QScrollBar:vertical"

                                                   "{"

                                                   "width:8px;"

                                                   "background:rgba(0,0,0,0%);"

                                                   "margin:0px,0px,0px,0px;"

                                                   "padding-top:9px;"

                                                   "padding-bottom:9px;"

                                                   "}"

                                                   "QScrollBar::handle:vertical"

                                                   "{"

                                                   "width:8px;"

                                                   "background:rgba(0,0,0,25%);"

                                                   " border-radius:4px;"

                                                   "min-height:20;"

                                                   "}"

                                                   "QScrollBar::handle:vertical:hover"

                                                   "{"

                                                   "width:8px;"

                                                   "background:rgba(0,0,0,50%);"

                                                   " border-radius:4px;"

                                                   "min-height:20;"

                                                   "}"

                                                   "QScrollBar::add-line:vertical"

                                                   "{"

                                                   "height:9px;width:8px;"

                                                   "border-image:url(:/images/a/3.png);"

                                                   "subcontrol-position:bottom;"

                                                   "}"

                                                   "QScrollBar::sub-line:vertical"

                                                   "{"

                                                   "height:9px;width:8px;"

                                                   "border-image:url(:/images/a/1.png);"

                                                   "subcontrol-position:top;"

                                                   "}"

                                                   "QScrollBar::add-line:vertical:hover"

                                                   "{"

                                                   "height:9px;width:8px;"

                                                   "border-image:url(:/images/a/4.png);"

                                                   "subcontrol-position:bottom;"

                                                   "}"

                                                   "QScrollBar::sub-line:vertical:hover"

                                                   "{"

                                                   "height:9px;width:8px;"

                                                   "border-image:url(:/images/a/2.png);"

                                                   "subcontrol-position:top;"

                                                   "}"

                                                   "QScrollBar::add-page:vertical,QScrollBar::sub-page:vertical"

                                                   "{"

                                                   "background:rgba(0,0,0,10%);"

                                                   "border-radius:4px;"

                                                   "}"

                                                   );