Qtreewidget置顶和取消置顶功能

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;

}