构造函数

    this->setSelectionMode(QAbstractItemView::ExtendedSelection);//全局可多选
    this->viewport()->installEventFilter(this);

事件拦截

bool ProjectTreeView::eventFilter(QObject* watched, QEvent* event)
{
        if(watched == this->viewport())
    {
        if(event->type()==QEvent::MouseMove)//禁用多选模式下，鼠标左键点击且移动的多选功能
        {
            QMouseEvent * mouseEvent = static_cast<QMouseEvent * >(event);
            if(mouseEvent->buttons()== Qt::LeftButton)
            {
               return true;
            }
        }
        if(event->type()==QEvent::MouseButtonDblClick)//先响应单机再响应双击
        {
            QMouseEvent * mouseEvent = static_cast<QMouseEvent * >(event);
            if(mouseEvent->button()== Qt::LeftButton)
            {
                 this->selectionModel()->clearSelection();
            }
        }
        else if(event->type()==QEvent::MouseButtonPress)
        {
              QMouseEvent * mouseEvent = static_cast<QMouseEvent * >(event);
              if(mouseEvent->button()== Qt::LeftButton)
              {
                  static bool isFirstControl = false;
                  if(this->selectionModel()->selectedIndexes().size() == 0)
                  {
                      isFirstControl = false;
                  }
                  if (QApplication::keyboardModifiers() == Qt::ControlModifier)
                  {
                      QModelIndex index;
                      index =this->indexAt(mouseEvent->pos());
                      ProjectItemData *pParentItem = static_cast<ProjectItemData*>(m_pProjectTreeModel->parent(index).internalPointer());
                      if(!pParentItem) return QWidget::eventFilter(watched,event);
                      if(pParentItem->getType() == ProjectItemData::XYPlots||pParentItem->getType() == ProjectItemData::DirectivityPlots
                              ||pParentItem->getType()  == ProjectItemData::MonitorPlots||pParentItem->getType() == ProjectItemData::TimeFourierTransform
                              ||pParentItem->getType() == ProjectItemData::TimeFourierTransformGroup)
                      {
                          ProjectItemData *pItem = static_cast<ProjectItemData*>(index.internalPointer());
                          if(!isFirstControl)
                          {
                              this->selectionModel()->clear();
                              m_currentNodeType = pItem->getType();
                              isFirstControl = true;
                          }
                          if(m_currentNodeType==pItem->getType())
                          {
                               if(pItem->getType() == ProjectItemData::ItemType::Fourier)
                               {
                                     emit signal_pressFourier(pItem);
                                     m_isFourierSingnalSelect = false;
                               }
                               emit signal_selectionChange(pItem,index);
                               return QWidget::eventFilter(watched,event);
                          }
                      }
                      return true;
                  }
                  emit signal_clrearFouriers();
                  this->selectionModel()->clear();
                  isFirstControl = false;
                  m_itemList.clear();
                  m_indexs.clear();
              }
        }
    }
    return QWidget::eventFilter(watched,event);
}

void ProjectTreeView::slot_selectionChange(const QModelIndex& index)
{
    for (int i = 0; i < m_itemList.size(); ++i)
    {
        if(pItem->getId() == m_itemList.at(i)->getId())
        return;
    }
    m_itemList.append(pItem);
    m_indexs.append(index);
}

当自己的选择后要做的事出发后要

                this->selectionModel()->clear();
                m_itemList.clear();
                m_indexs.clear();

批量删除选择的节点class ProjectTreeModel : public QAbstractItemModel中

bool ProjectTreeModel::deleteNodes(const QList<QModelIndex>& listModelIndex)
{
    if(listModelIndex.size()==0)
    {
       return false;
    }
    if(!listModelIndex.at(0).parent().isValid())
    {
        return false;
    }

    for (int i = 0; i < listModelIndex.size(); ++i)
    {
        beginRemoveRows(listModelIndex.at(i).parent(),listModelIndex.at(i).row(),listModelIndex.at(i).row());
        TreeItemBaseData *pItem = static_cast<TreeItemBaseData*>(listModelIndex.at(i).internalPointer());
        if(pItem)
        {
            TreeItemBaseData *parentNode = pItem->getParent();
            if(parentNode)
            {
                parentNode->removeChild(pItem);
            }
        }
    }
    endRemoveRows();
    return true;
}