C++ QAbstractItemModel::insertRows方法代码示例

//! [0]
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

// Unindented for quoting purposes:
//! [1]
QStringList numbers;
numbers << "One" << "Two" << "Three" << "Four" << "Five";

QAbstractItemModel *model = new StringListModel(numbers);
//! [0] //! [1] //! [2] //! [3]
QListView *view = new QListView;
//! [2]
view->setWindowTitle("View onto a string list model");
//! [4]
view->setModel(model);
//! [3] //! [4]

    model->insertRows(5, 7, QModelIndex());

    for (int row = 5; row < 12; ++row) {
        QModelIndex index = model->index(row, 0, QModelIndex());
        model->setData(index, QString::number(row+1));
    }

//! [5]
    view->show();
    return app.exec();
}

bool Utils::ModelListModel::insertRows(int row, int count, const QModelIndex& parent)
{
	Utils::ModelListModel::SubModelIndex smi = mapToSource(parent);
	if (smi.first == m_metaModel && smi.second.parent().isValid())
	{
		QAbstractItemModel* subModel = m_subModels.value(smi.second.row());
		if (subModel)
			return subModel->insertRows(row, count);
	}
	return smi.first->insertRows(row, count, smi.second);
}

void QgsTableWidgetBase::on_addButton_clicked()
{
    const QItemSelectionModel *select = tableView->selectionModel();
    const int pos = select->hasSelection() ? select->selectedRows()[0].row() : 0;
    QAbstractItemModel* model = tableView->model();
    model->insertRows( pos, 1 );
    const QModelIndex index = model->index( pos, 0 );
    tableView->scrollTo( index );
    tableView->edit( index );
    tableView->selectRow( pos );
}

void LineEdit::learnEntry()
{
    QAbstractItemModel *m = completer()->model();
    int rows = m->rowCount();
    for (int i = 0; i < rows; ++i) {
        if (m->index(i,0).data() == text()) {
            m->removeRow(i);
            --rows;
            break;
        }
    }
    m->insertRows(rows, 1);
    m->setData(m->index(rows, 0), text(), Qt::DisplayRole);
    m_historyPosition = rows + 1;
}

void DefectsEditor::insertRow()
{
    QModelIndex index = tableView->selectionModel()->currentIndex();
    QAbstractItemModel* model = tableView->model();

    if (!model->insertRows(index.row() + 1, 1, index.parent()))
        return;

    //updateActions();

    updateData(index, index);
    /*for (int column = 0; column < model->columnCount( index.parent() ); ++column) {
   QModelIndex child = model->index( index.row() + 1, column, index.parent() );
   model->setData( child, QVariant( "[No data]" ), Qt::EditRole );
   }*/
}

    void PathPlanningWidget::insertRow(const tf::Transform& point_pos,const int count)
    {
      /*! Whenever we have a new Way-Point insereted either from the RViz or the RQT Widget the the TreeView needs to update the information and insert new row that corresponds to the new insered point.
          This function takes care of parsing the data recieved from the RViz or the RQT widget and creating new row with the appropriate data format and Children. One for the position giving us the current position of the Way-Point in all the axis.
          One child for the orientation giving us the Euler Angles of each axis.
      */

      ROS_INFO("inserting new row in the TreeView");
      QAbstractItemModel *model = ui_.treeView->model();

      //convert the quartenion to roll pitch yaw angle
      tf::Vector3 p = point_pos.getOrigin();
      tfScalar rx,ry,rz;
      point_pos.getBasis().getRPY(rx,ry,rz,1);

      if(count == 0)
      {
        model->insertRow(count,model->index(count, 0));

        model->setData(model->index(0,0,QModelIndex()),QVariant("add_point_button"),Qt::EditRole);
        pointRange();
      }
      else
      {
      //ROS_INFO_STREAM("Quartenion at add_row: "<<orientation.x()<<"; "<<orientation.y()<<"; "<<orientation.z()<<"; "<<orientation.w()<<";");

       if(!model->insertRow(count,model->index(count, 0)))  //&& count==0
       {
         return;
       }
      //set the strings of each axis of the position
      QString pos_x = QString::number(p.x());
      QString pos_y = QString::number(p.y());
      QString pos_z = QString::number(p.z());

      //repeat that with the orientation
      QString orient_x = QString::number(RAD2DEG(rx));
      QString orient_y = QString::number(RAD2DEG(ry));
      QString orient_z = QString::number(RAD2DEG(rz));

      model->setData(model->index(count,0),QVariant(count),Qt::EditRole);

      //add a child to the last inserted item. First add children in the treeview that
      //are just telling the user that if he expands them he can see details about the position and orientation of each point
      QModelIndex ind = model->index(count, 0);
      model->insertRows(0, 2, ind);
      QModelIndex chldind_pos = model->index(0, 0, ind);
      QModelIndex chldind_orient = model->index(1, 0, ind);
      model->setData(chldind_pos, QVariant("Position"), Qt::EditRole);
      model->setData(chldind_orient, QVariant("Orientation"), Qt::EditRole);
//*****************************Set the children for the position**********************************************************
      //now add information about each child separately. For the position we have coordinates for X,Y,Z axis.
      //therefore we add 3 rows of information
      model->insertRows(0, 3, chldind_pos);

      //next we set up the data for each of these columns. First the names
      model->setData(model->index(0, 0, chldind_pos), QVariant("X:"), Qt::EditRole);
      model->setData(model->index(1, 0, chldind_pos), QVariant("Y:"), Qt::EditRole);
      model->setData(model->index(2, 0, chldind_pos), QVariant("Z:"), Qt::EditRole);

      //second we add the current position information, for each position axis separately
      model->setData(model->index(0, 1, chldind_pos), QVariant(pos_x), Qt::EditRole);
      model->setData(model->index(1, 1, chldind_pos), QVariant(pos_y), Qt::EditRole);
      model->setData(model->index(2, 1, chldind_pos), QVariant(pos_z), Qt::EditRole);
//***************************************************************************************************************************

//*****************************Set the children for the orientation**********************************************************
      //now we repeat everything again,similar as the position for adding the children for the orientation
      model->insertRows(0, 3, chldind_orient);
      //next we set up the data for each of these columns. First the names
      model->setData(model->index(0, 0, chldind_orient), QVariant("Rx:"), Qt::EditRole);
      model->setData(model->index(1, 0, chldind_orient), QVariant("Ry:"), Qt::EditRole);
      model->setData(model->index(2, 0, chldind_orient), QVariant("Rz:"), Qt::EditRole);

      //second we add the current position information, for each position axis separately
      model->setData(model->index(0, 2, chldind_orient), QVariant(orient_x), Qt::EditRole);
      model->setData(model->index(1, 2, chldind_orient), QVariant(orient_y), Qt::EditRole);
      model->setData(model->index(2, 2, chldind_orient), QVariant(orient_z), Qt::EditRole);
//****************************************************************************************************************************
      pointRange();
    }

    }

/*!
    Fills model with some test data at least twenty rows and if possible twenty or more columns.
    Return the parent of a row/column that can be tested.

    NOTE: If readOnly is true tests will try to remove and add rows and columns.
    If you have a tree model returning not the root index will help catch more errors.
 */
QModelIndex ModelsToTest::populateTestArea(QAbstractItemModel *model)
{
    if (QStringListModel *stringListModel = qobject_cast<QStringListModel *>(model)) {
        QString alphabet = "a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z";
        stringListModel->setStringList( alphabet.split(",") );
        return QModelIndex();
    }

    if (qobject_cast<QStandardItemModel *>(model)) {
        // Basic tree StandardItemModel
        QModelIndex parent;
        QVariant blue = QVariant(QColor(Qt::blue));
#ifndef Q_OS_WINCE
        for (int i = 0; i < 4; ++i) {
#else
        for (int i = 0; i < 2; ++i) {
#endif
            parent = model->index(0, 0, parent);
            model->insertRows(0, 26 + i, parent);
#ifndef Q_OS_WINCE
            model->insertColumns(0, 26 + i, parent);
#else
            model->insertColumns(0, 4 + i, parent);
#endif
            // Fill in some values to make it easier to debug
            /*
            for (int x = 0; x < 26 + i; ++x) {
                QString xval = QString::number(x);
                for (int y = 0; y < 26 + i; ++y) {
                    QString val = xval + QString::number(y) + QString::number(i);
                    QModelIndex index = model->index(x, y, parent);
                    model->setData(index, val);
                    model->setData(index, blue, Qt::TextColorRole);
                }
            }
            */
        }
        return model->index(0,0);
    }

    if (qobject_cast<QSortFilterProxyModel *>(model)) {
        QAbstractItemModel *realModel = (qobject_cast<QSortFilterProxyModel *>(model))->sourceModel();
        // Basic tree StandardItemModel
        QModelIndex parent;
        QVariant blue = QVariant(QColor(Qt::blue));
#ifndef Q_OS_WINCE
        for (int i = 0; i < 4; ++i) {
#else
        for (int i = 0; i < 2; ++i) {
#endif
            parent = realModel->index(0, 0, parent);
            realModel->insertRows(0, 26+i, parent);
#ifndef Q_OS_WINCE
            realModel->insertColumns(0, 26+i, parent);
#else
            realModel->insertColumns(0, 4, parent);
#endif
            // Fill in some values to make it easier to debug
            /*
            for (int x = 0; x < 26+i; ++x) {
                QString xval = QString::number(x);
                for (int y = 0; y < 26 + i; ++y) {
                    QString val = xval + QString::number(y) + QString::number(i);
                    QModelIndex index = realModel->index(x, y, parent);
                    realModel->setData(index, val);
                    realModel->setData(index, blue, Qt::TextColorRole);
                }
            }
            */
        }
        QModelIndex returnIndex = model->index(0,0);
        if (!returnIndex.isValid())
            qFatal("%s: model index to be returned is invalid", Q_FUNC_INFO);
        return returnIndex;
    }

    if (QDirModel *dirModel = qobject_cast<QDirModel *>(model)) {
        if (!QDir::current().mkdir("test"))
            qFatal("%s: cannot create directory %s",
                   Q_FUNC_INFO,
                   qPrintable(QDir::toNativeSeparators(QDir::currentPath()+"/test")));
        for (int i = 0; i < 26; ++i) {
            QString subdir = QString("test/foo_%1").arg(i);
            if (!QDir::current().mkdir(subdir))
                qFatal("%s: cannot create directory %s",
                       Q_FUNC_INFO,
                       qPrintable(QDir::toNativeSeparators(QDir::currentPath()+"/"+subdir)));
        }
        return dirModel->index(QDir::currentPath()+"/test");
    }

    if (QSqlQueryModel *queryModel = qobject_cast<QSqlQueryModel *>(model)) {
        QSqlQuery q;
//.........这里部分代码省略.........