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    40 

    41 //! [Quoting ModelView Tutorial]

    42 // modelview.cpp

    43 #include <QTreeView>

    44 #include <QStandardItemModel>

    45 #include <QStandardItem>

    46 #include "modelview.h"

    47 

    48 

    49 const int ROWS = 2;

    50 const int COLUMNS = 3;

    51 

    52 ModelView::ModelView(QWidget *parent)

    53     : QMainWindow(parent)

    54 {

    55     treeView = new QTreeView(this);

    56     setCentralWidget(treeView);

    57     standardModel = new QStandardItemModel ;

    58 

    59     QList<QStandardItem *> preparedColumn =prepareColumn("first", "second", "third");

    60     QStandardItem *item = standardModel->invisibleRootItem();

    61     // adding a row to the invisible root item produces a root element

    62     item->appendRow(preparedColumn);

    63 

    64     QList<QStandardItem *> secondRow =prepareColumn("111", "222", "333");

    65     // adding a row to an item starts a subtree

    66     preparedColumn.first()->appendRow(secondRow);

    67 

    68     treeView->setModel(standardModel);

    69     treeView->expandAll();

    70 }

    71 

    72 QList<QStandardItem *> ModelView::prepareColumn(const QString &first,

    73                                                 const QString &second,

    74                                                 const QString &third)

    75 {

    76     QList<QStandardItem *> colItems;

    77     colItems << new QStandardItem(first);

    78     colItems << new QStandardItem(second);

    79     colItems << new QStandardItem(third);

    80     return colItems;

    81 }

    82 //! [Quoting ModelView Tutorial]