1.1 Treewidget置顶和取消置顶
需求中有个置顶案件的需求，取消置顶之后，被取消的案件在最后一个置顶案件下面，新建的案件也要在置顶案件下面，Treewidget本身没有置顶的功能，但是Treewidget有个排序的功能，可以根据排序功能来做置顶和取消置顶功能；
（1）首选案件按照逆序排列
treeWidget->setSortingEnabled(true);
ui.treeWidget->sortItems(0, Qt::SortOrder::DescendingOrder);//案件按照添加时间逆序排列
（2）置顶和取消置顶设置时间text
创建案件时，设置创建时间，置顶时将案件时间加上100年，这样就会自动按照时间逆序排序而置顶，当取消置顶时，再将时间减去100年；就会根据自动排序功能，回到原来的位置；
connect(pCase->ui.pbTop, &QPushButton::clicked, this, [=]() {
//更新时间
if (pCase->m_top)//取消置顶
{
pCase->ui.pbTop->setToolTip("置顶");
pCase->ui.pbTop->setChecked(false);
pCase->m_top = false;
QString strTime = QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss");
topItem->setText(0, strTime);
QString strSql = QString("update CaseManage set createtime = '%1' ,top='0' where path='%2'").arg(strTime).arg(info.value("path").toString());
QString strmsg = "";
QVariantMap result;
LocalDb::instance()->ExcuateSql(strSql, result, strmsg);
if (m_picPathDirInfo.find(info.value("path").toString()) != m_picPathDirInfo.end())
{
m_picPathDirInfo[info.value("path").toString()]["createtime"] = strTime;
m_picPathDirInfo[info.value("path").toString()]["top"] = "0";
}
}
else//置顶
{
pCase->ui.pbTop->setToolTip("取消置顶");
pCase->ui.pbTop->setChecked(true);
pCase->m_top = true;
//增加100年作为置顶时间排序最上面
QString strTime = QDateTime::currentDateTime().addYears(100).toString("yyyy-MM-dd hh:mm:ss");
topItem->setText(0, strTime);
QString strSql = QString("update CaseManage set createtime= '%1' , top='1' where path='%2'").arg(strTime).arg(info.value("path").toString());
QString strmsg = "";
QVariantMap result;
LocalDb::instance()->ExcuateSql(strSql, result, strmsg);
if (m_picPathDirInfo.find(info.value("path").toString()) != m_picPathDirInfo.end())
{
m_picPathDirInfo[info.value("path").toString()]["createtime"] = strTime;
m_picPathDirInfo[info.value("path").toString()]["top"] = "1";
}
}
SlotUpdateTreeListBackground();
});
(3)设置时间显示为透明
QTreeWidget
{
background: #303033;
font-size:16px;
color: rgba(255,255,255,0);//字体颜色白色透明，不会显示
border:0px;
background-image:url(:/preview/Resources/previewanalyze/nodata.png);
background-repeat:no-repeat;
background-position:center;
}
QTreeWidget::item
{
background: #303033;
}
QTreeWidget::branch
{
background:#303033;
}
QTreeWidget::item:hover
{
background: rgba(255,255,255,0.12);
}
QTreeWidget::item:selected{
background: rgba(32,128,247,0.32);
color: rgba(32,128,247,0);
}
QTreeWidget::branch:closed:has-children:!has-siblings,
QTreeWidget::branch:closed:has-children:has-siblings {
background-image:url(:/analysisCenter/Resources/analysisCenter/arrowexpend-nor.svg);
background-repeat:no-repeat;
background-position:center;
}
QTreeWidget::branch:open:has-children:!has-siblings,
QTreeWidget::branch:open:has-children:has-siblings {
background-image:url(:/analysisCenter/Resources/analysisCenter/arrowclose-nor.svg);
background-repeat:no-repeat;
background-position:center;
}
标签：Qtreewidget,取消,QTreeWidget,pCase,toString,background,path,置顶 From： https://www.cnblogs.com/bclshuai/p/17162009.html