1.需求描述
QStyledItemDelegate实现按钮的点击和响应功能，鼠标移动到按钮上，也会显示tooltip提示信息
2.实现方法
（1）重写editorEvent函数，根据type类型触发不同的响应函数
为了实现按钮的响应，需要重写QStyledItemDelegate 类的editorEvent函数，并根据插入时设置进去的type类型，判断是什么类型，然后去触发不同鼠标消息。
bool TreeTaskDelegate::editorEvent(QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option, const QModelIndex &index)
{
//QMouseEvent *pEvent = static_cast<QMouseEvent *> (event);
//m_mousePoint = pEvent->pos();
bool ret = false;
// 还原鼠标样式
QApplication::restoreOverrideCursor();
QVariantMap var = index.data(Qt::UserRole).toMap();
if (var.contains("type"))
{
QString strType = var.value("type").toString();
if (strType == "0")
{
ret=TriggerCase(event, model, option,index);
}
else if (strType == "1")
{
ret=TriggerFolder(event, model, option, index);
}
else if (strType == "3")
{
ret=TriggerCamera(event, model, option, index);
}
else if (strType == "2")
{
ret=TriggerVideo(event, model, option, index);
}
}
return QStyledItemDelegate::editorEvent(event, model, option, index);
}
（2）根据坐标和鼠标消息类型响应不同的鼠标消息
还是以案件的触发来举例说明如何实现，根据绘制的按钮的坐标数据（要和paintCase函数中的按钮坐标一致），当鼠标在绘制的按钮矩形上移动时，触发QEvent::MouseMove信号，显示tooltips提示信息，一定要将QTreeView的mousetracing属性设置为true，否则无法触发QEvent::MouseMove信号；
点击按钮时触发MouseButtonRelease信号，根据坐标矩形区域判断是否点击了哪个按钮，向外发送按钮点击信号；
bool TreeTaskDelegate::TriggerCase(QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option, const QModelIndex &index)
{
bool ret = true;
QMouseEvent *pEvent = static_cast<QMouseEvent *> (event);
if (pEvent == NULL)
{
return true;
}
QVariantMap info = index.data(Qt::UserRole).toMap();
m_mousePoint = pEvent->pos();
QRect rectItem = option.rect;
QRect rectTop = QRect(rectItem.x() + 75, rectItem.y() + 8, 24, 24);
QRect rectEdit = QRect(rectItem.x() + 95, rectItem.y() + 8, 24, 24);
QRect rectCreateDir = QRect(rectItem.x() + 125, rectItem.y() + 8, 24, 24);
QRect rectInput = QRect(rectItem.x() + 155, rectItem.y() + 8, 24, 24);
QRect rectDelete = QRect(rectItem.x() + 185, rectItem.y() + 8, 24, 24);
QRect rectState = QRect(rectItem.x() + 210, rectItem.y() + 10, 54, 20);
QRect nameRect = QRect(rectItem.x() + 44, rectItem.y() + 8, 20, 24);
switch (pEvent->type())
{
case QEvent::MouseButtonRelease:
if (rectTop.contains(m_mousePoint))
{
emit signalBtClicked("0", "Top", index);
}
else if (rectEdit.contains(m_mousePoint))
{
emit signalBtClicked("0", "Edit", index);
}
else if (rectCreateDir.contains(m_mousePoint))
{
emit signalBtClicked("0", "CreateDir", index);
}
else if (rectInput.contains(m_mousePoint))
{
emit signalBtClicked("0", "Input", index);
}
else if (rectDelete.contains(m_mousePoint))
{
emit signalBtClicked("0", "Delete", index);
}
else if (rectState.contains(m_mousePoint))
{
emit signalBtClicked("0", "State", index);
}
break;
case QEvent::MouseMove:
{
if (rectTop.contains(m_mousePoint))
{
if (info.contains("top") && info.value("top").toString() == "1")
{
QToolTip::showText(pEvent->globalPos(), "取消置顶");
}
else
{
QToolTip::showText(pEvent->globalPos(), "置顶");
}
}
else if (rectEdit.contains(m_mousePoint))
{
QToolTip::showText(pEvent->globalPos(), "重命名");
}
else if (rectCreateDir.contains(m_mousePoint))
{
QToolTip::showText(pEvent->globalPos(), "创建子文件夹");
}
else if (rectInput.contains(m_mousePoint))
{
QToolTip::showText(pEvent->globalPos(), "导入");
}
else if (rectDelete.contains(m_mousePoint))
{
QToolTip::showText(pEvent->globalPos(), "删除");
}
else if (rectState.contains(m_mousePoint))
{
emit signalBtClicked("0", "State", index);
}
else if (nameRect.contains(m_mousePoint))
{
QToolTip::showText(pEvent->globalPos(), info.value("name").toString());
}
break;
}
}
return ret;
}
（3）连接代理的鼠标点击信号和组织树的响应函数
connect(m_TreeDelegate, &TreeTaskDelegate::signalBtClicked, this, &TreeTaskList::SlotTreeBtClicked);
（4）实现按钮点击响应函数
根据delegate类传过来的信号type判断是案件、文件夹、监控点、视频任务；根据按钮类型判断是置顶、导入、删除等按钮；然后去处理不同的消息；
void TreeTaskList::SlotTreeBtClicked(QString type, QString bt, const QModelIndex &index)
{
QVariantMap caseinfo = index.data(Qt::UserRole).toMap();
QStandardItem*pItem = caseinfo.value("treeItem").value<QStandardItem*>();
if (pItem==NULL)
{
LOG_ERROR("Btn Click pitem is NULL");
return;
}
if (type=="0")//案件
{
if (bt== "Top")
{
QString strTop =caseinfo.value("top").toString();
if (strTop=="1")//取消置顶
{
caseinfo.insert("top", "0");
QString strTime = QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss.zzz");
caseinfo.insert("createtime", strTime);
pItem->setData(strTime, QOrderRole);
QString strSql = QString("update CaseManage set createtime = '%1' ,top='0' where path='%2'").arg(strTime).arg(caseinfo.value("path").toString());
QString strmsg = "";
QVariantMap result;
LocalDb::instance()->ExcuateSql(strSql, result, strmsg);
if (m_picPathDirInfo.find(caseinfo.value("path").toString()) != m_picPathDirInfo.end())
{
m_picPathDirInfo[caseinfo.value("path").toString()]["createtime"] = strTime;
m_picPathDirInfo[caseinfo.value("path").toString()]["top"] = "0";
}
pItem->setData(caseinfo, Qt::UserRole);
}
else//置顶
{
caseinfo.insert("top", "1");
//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.zzz");
caseinfo.insert("createtime", strTime);
pItem->setData(strTime, QOrderRole);
QString strSql = QString("update CaseManage set createtime= '%1' , top='1' where path='%2'").arg(strTime).arg(caseinfo.value("path").toString());
QString strmsg = "";
QVariantMap result;
LocalDb::instance()->ExcuateSql(strSql, result, strmsg);
if (m_picPathDirInfo.find(caseinfo.value("path").toString()) != m_picPathDirInfo.end())
{
m_picPathDirInfo[caseinfo.value("path").toString()]["createtime"] = strTime;
m_picPathDirInfo[caseinfo.value("path").toString()]["top"] = "1";
}
pItem->setData(caseinfo, Qt::UserRole);
}
SlotUpdateTreeListBackground();
m_modelTree->sort(0, Qt::DescendingOrder);
}
else if (bt== "Edit")
{
caseinfo.insert("editing", "Edit");
pItem->setData(caseinfo, Qt::UserRole);
ui.treeView->openPersistentEditor(index);
}
else if (bt== "CreateDir")
{
AddEmptyFoldToList(pItem);
QModelIndex index = m_modelTree->indexFromItem(pItem);
if (index.isValid())
{
ui.treeView->expand(index);
}
}
else if (bt== "Input")
{
if (m_bAddingTaskToList)
{
emit signalError(-3, "正在批量导入任务，导入过程中不可用，请稍后重试");
return;
}
m_pCurrentItem = pItem;
if (m_pCurrentItem)
{
QString strParantPath = m_pCurrentItem->data(Qt::UserRole).toMap().value("path").toString();
QString strType = m_pCurrentItem->data(Qt::UserRole).toMap().value("type").toString();
if (strType == "0" || strType == "1")
{
DLMgr::instance()->Fun_SetCurrentItemPath(strParantPath);
}
}
m_iaddType = 1;
emit signalAddAnaClicked(m_iaddType);
}
else if (bt== "Delete")
{
ConfirmDialog dig("删除案件将清空相关的数据和图片，确认删除？");
if (dig.exec() == QDialog::Rejected)
{
return;
}
UpdateChildCheckState(pItem, true);
QStringList listDelPicPath;
QMap<QString, QVariantMap>taskInfos;
BatchRecursiveDeleteItem(pItem, listDelPicPath, taskInfos);
QString strPath = caseinfo.value("path").toString();
if (strPath != "")
{
listDelPicPath.push_back(strPath);
m_picPathDirInfo.remove(strPath);
}
DeleteCaseThread* pDelThread = new DeleteCaseThread();
connect(pDelThread, &DeleteCaseThread::finished, pDelThread, [=]() {
SlotUpdateTreeListBackground();
UpdateAllCasesStatistic();
pDelThread->deleteLater();
emit signalSelectVedioChanged(m_mapStrFileSelected);
});
connect(pDelThread, SIGNAL(signalDelCollisionTask(QString)), this, SLOT(SlotDelCollisionTask(QString)));
connect(pDelThread, &DeleteCaseThread::signalDeleteProgress, &m_progressDialog, &ProgressDialog::SlotDeleteProgress);
pDelThread->SetDeleteCases(listDelPicPath, taskInfos);
m_progressDialog.SlotDeleteProgress(0);
m_progressDialog.exec();
if (index.isValid())
{
m_modelTree->removeRow(index.row());
}
SlotUpdateTreeListBackground();
UpdateAllCasesStatistic();
emit signalSelectVedioChanged(m_mapStrFileSelected);
}
else if (bt== "State")
{
TasksStatistic taskState = caseinfo.value("TasksStatistic").value<TasksStatistic>();
m_CaseStateWidget.SetTasksStatistic(taskState);
QPoint Point = QCursor::pos();
m_CaseStateWidget.move(Point.x() + 10, Point.y() + 10);
m_CaseStateWidget.hide();//先隐藏再显示，否则会出现在下面；
m_CaseStateWidget.show();
m_CaseStateWidget.setFocus(Qt::FocusReason::ActiveWindowFocusReason);
}
}
}
这样就实现了不同按钮点击和响应的的功能；
标签：index,hover,QTreeView,caseinfo,value,else,toString,QString,QStyledItemDelegate From： https://www.cnblogs.com/bclshuai/p/18414306