QDataWidgetMapper, QStyledItemDelegate et createEditor()

Alors, j'ai tenté de ré-implémenter QAbstractItemView et je me suis pour l'instant contenté de ré-implémenter les méthodes virtuelles pures.

J'utilise setIndexWidget() pour tenter de faire apparaître le contenu de certaines colonnes dans les widgets appropriés. Je dis tenter parce que ça ne fonctionne pas. Rien n'apparaît dans les champs.

Est-ce que setIndexWidget() est approprié ?

Qu'est-ce que je devrais ré-implémenter d'autres comme méthodes ?

Merci d'avance

Code:

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#ifndef SINGLEBOOKVIEW2_H
#define SINGLEBOOKVIEW2_H
 
#include <QAbstractItemView>
 
#include "booksmodel.h"
#include "interactivelistwidget.h"
 
#include <QGridLayout>
#include <QFormLayout>
#include <QDataWidgetMapper>
#include <QSpinBox>
#include <QPlainTextEdit>
#include <QDoubleSpinBox>
#include <QGroupBox>
 
class SingleBookView2 : public QAbstractItemView
{
    Q_OBJECT
public:
    explicit SingleBookView2(QAbstractItemModel* model, QModelIndex index, QWidget *parent = 0);
 
    virtual QRect visualRect(const QModelIndex &index) const;
 
    virtual void scrollTo(const QModelIndex &index, ScrollHint hint);
 
    virtual QModelIndex indexAt(const QPoint &point) const;
 
protected:
    virtual QModelIndex moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers);
 
    virtual int horizontalOffset() const;
 
    virtual int verticalOffset() const;
 
    virtual bool isIndexHidden(const QModelIndex &index) const;
 
    virtual void setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags command);
 
    virtual QRegion visualRegionForSelection(const QItemSelection &selection) const;
 
signals:
 
public slots:
    void startEditingNewBook();
 
    void changeBook(QModelIndex& index);
 
    void submit();
 
    void revert();
 
    void modifyField(unsigned int section, bool isModified = true);
 
    void toNext();
 
    void toPrevious();
 
    void setEditionEnabled(bool enable);
 
private:
    void createLayout();
 
    QAbstractItemModel* model;
 
    QModelIndex index;
 
    bool isEditing;
 
    QMap<unsigned int, QLabel*> labels;
    QMap<unsigned int, QString> labelTexts;
    QMap<unsigned int, QWidget*> editionWidgets;
    QMap<unsigned int, QLabel*> viewWidgets;
 
    QVBoxLayout* mainLayout;
 
    QGroupBox* informations_groupBox;
 
    QHBoxLayout* informations_hBoxLayout;
 
    QFormLayout* informations_left_formLayout;
 
    InteractiveListWidget* authors_widget;
 
    QLabel* authors_view_label;
 
    QFormLayout* informations_right_formLayout;
 
    QLineEdit* books_title_lineEdit;
 
    QLabel* books_title_view_label;
 
    QLineEdit* books_editor_lineEdit;
 
    QLabel* books_editor_view_label;
 
    QSpinBox* books_year_spinBox;
 
    QLabel* books_year_view_label;
 
    QPlainTextEdit* books_description_plainTextEdit;
 
    QLabel* books_description_view_label;
 
    QGroupBox* characteristics_groupBox;
 
    QHBoxLayout* characteristics_hBoxLayout;
 
    QFormLayout* characteristics_left_formLayout;
 
    QFormLayout* characteristics_right_formLayout;
 
    QSpinBox* books_nbr_pages_spinBox;
 
    QLabel* books_nbr_pages_view_label;
 
    QDoubleSpinBox* books_weight_doubleSpinBox;
 
    QLabel* books_weight_view_label;
 
    QDoubleSpinBox* books_width_doubleSpinBox;
 
    QLabel* books_width_view_label;
 
    QDoubleSpinBox* books_height_doubleSpinBox;
 
    QLabel* books_height_view_label;
 
    QDoubleSpinBox* books_price_doubleSpinBox;
 
    QLabel* books_price_view_label;
 
    QPlainTextEdit* books_comment_plainTextEdit;
 
    QLabel* books_comment_view_label;
 
    InteractiveListWidget* keywords_widget;
 
    QLabel* keywords_view_label;
 
    QMap<unsigned int, bool> fieldsModified;
};
 
#endif // SINGLEBOOKVIEW2_H

Code:

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#include "singlebookview2.h"
#include "booksmodeldelegate.h"
 
#include <QDebug>
 
#include <QMessageBox>
 
#include <QSortFilterProxyModel>
 
SingleBookView2::SingleBookView2(QAbstractItemModel* model, QModelIndex index, QWidget *parent) :
    QAbstractItemView(parent), model(model), index(index)
{
    isEditing = false;
 
    setModel(model);
 
    createLayout();
 
    setCurrentIndex(index);
 
    //BooksModelDelegate* bmd = new BooksModelDelegate();
 
    //setItemDelegate(bmd);
}
 
void SingleBookView2::createLayout() {
    const BooksModel* booksModel = NULL;
    if(qobject_cast<const BooksModel*>(model) != NULL)
        booksModel = qobject_cast<const BooksModel*>(model);
    else if(qobject_cast<const QSortFilterProxyModel*>(model) != NULL) {
        const QSortFilterProxyModel* pmodel = qobject_cast<const QSortFilterProxyModel*>(model);
 
        if(qobject_cast<BooksModel*>(pmodel->sourceModel()) != NULL)
            booksModel = qobject_cast<BooksModel*>(pmodel->sourceModel());
    }
 
    if(booksModel == NULL) {
        qDebug() << "ERROR: invalid model";
 
        return;
    }
 
    int row = index.row();
 
    /* BEGIN COMPLETERS: AUTHORS */
    QMap<QString, QCompleter*> authors_fields_completer;
 
    QSqlTableModel* authors_last_name_model = new QSqlTableModel();
    authors_last_name_model->setTable("authors");
    authors_last_name_model->setEditStrategy(QSqlTableModel::OnManualSubmit);
    authors_last_name_model->select();
 
    authors_fields_completer["authors_last_name"] = new QCompleter();
    authors_fields_completer["authors_last_name"]->setModel(authors_last_name_model);
    authors_fields_completer["authors_last_name"]->setCompletionColumn(authors_last_name_model->fieldIndex("authors_last_name"));
    authors_fields_completer["authors_last_name"]->setCompletionMode(QCompleter::InlineCompletion);
 
    QSqlTableModel* authors_first_name_model = new QSqlTableModel();
    authors_first_name_model->setTable("authors");
    authors_first_name_model->setEditStrategy(QSqlTableModel::OnManualSubmit);
    authors_first_name_model->select();
 
    authors_fields_completer["authors_first_name"] = new QCompleter();
    authors_fields_completer["authors_first_name"]->setModel(authors_first_name_model);
    authors_fields_completer["authors_first_name"]->setCompletionColumn(authors_first_name_model->fieldIndex("authors_first_name"));
    authors_fields_completer["authors_first_name"]->setCompletionMode(QCompleter::InlineCompletion);
    /* END COMPLETERS: AUTHORS */
 
    /* BEGIN COMPLETERS: KEYWORDS */
    QMap<QString, QCompleter*> keywords_fields_completer;
 
    QSqlTableModel* keywords_text_model = new QSqlTableModel();
    keywords_text_model->setTable("keywords");
    keywords_text_model->setEditStrategy(QSqlTableModel::OnManualSubmit);
    keywords_text_model->select();
 
    keywords_fields_completer["keywords_text"] = new QCompleter();
    keywords_fields_completer["keywords_text"]->setModel(keywords_text_model);
    keywords_fields_completer["keywords_text"]->setCompletionColumn(1);
    keywords_fields_completer["keywords_text"]->setCompletionMode(QCompleter::InlineCompletion);
    /* END COMPLETERS: KEYWORDS */
 
    QLabel* label = NULL;
    unsigned int fieldIndex;
    QString labelText;
    QWidget* tmpEditionWidget = NULL;
    QLabel* tmpViewWidget = NULL;
 
    mainLayout = new QVBoxLayout;
 
    informations_groupBox = new QGroupBox(tr("Main informations"));
 
    informations_hBoxLayout = new QHBoxLayout;
 
    informations_left_formLayout = new QFormLayout;
 
    /* BEGIN: BOOKS_TITLE */
    fieldIndex = booksModel->fieldIndex("books_title");
 
    books_title_lineEdit = new QLineEdit();
    books_title_lineEdit->setPlaceholderText(tr("Type title"));
    books_title_lineEdit->setMinimumWidth(200);
    tmpEditionWidget = books_title_lineEdit;
    editionWidgets[fieldIndex] = tmpEditionWidget;
 
    books_title_view_label = new QLabel;
    tmpViewWidget = books_title_view_label;
    viewWidgets[fieldIndex] = tmpViewWidget;
 
    labelText = tr("Book title");
    labelTexts[fieldIndex] = labelText;
 
    label = new QLabel(labelText);
    labels[fieldIndex] = label;
 
    fieldsModified[fieldIndex] = false;
 
    informations_left_formLayout->addRow(label, tmpEditionWidget);
    //informations_left_formLayout->addRow(label, tmpViewWidget);
 
    setIndexWidget(booksModel->index(row, fieldIndex), tmpEditionWidget);
    //setIndexWidget(booksModel->index(row, fieldIndex), tmpViewWidget);
    /* END: BOOKS_TITLE */
 
 
    /* BEGIN: BOOKS_EDITOR */
    fieldIndex = booksModel->fieldIndex("books_editor");
 
    books_editor_lineEdit = new QLineEdit();
    books_editor_lineEdit->setPlaceholderText(tr("Type editor name"));
    books_editor_lineEdit->setMinimumWidth(200);
    tmpEditionWidget = books_editor_lineEdit;
    editionWidgets[fieldIndex] = tmpEditionWidget;
 
    books_editor_view_label = new QLabel;
    tmpViewWidget = books_editor_view_label;
    viewWidgets[fieldIndex] = tmpViewWidget;
 
    labelText = tr("Book Editor");
    labelTexts[fieldIndex] = labelText;
 
    label = new QLabel(labelText);
    labels[fieldIndex] = label;
 
    fieldsModified[fieldIndex] = false;
 
    informations_left_formLayout->addRow(label, tmpEditionWidget);
    //informations_left_formLayout->addRow(label, tmpViewWidget);
 
    setIndexWidget(booksModel->index(row, fieldIndex), tmpEditionWidget);
    //setIndexWidget(booksModel->index(row, fieldIndex), tmpViewWidget);
    /* END: BOOKS_EDITOR */
 
 
    /* BEGIN: BOOKS_YEAR */
    fieldIndex = booksModel->fieldIndex("books_year");
 
    books_year_spinBox = new QSpinBox();
    books_year_spinBox->setRange(0, 2200);
    books_year_spinBox->setValue(1980);
    tmpEditionWidget = books_year_spinBox;
    editionWidgets[fieldIndex] = tmpEditionWidget;
 
    books_year_view_label = new QLabel;
    tmpViewWidget = books_year_view_label;
    viewWidgets[fieldIndex] = tmpViewWidget;
 
    labelText = tr("Edition year");
    labelTexts[fieldIndex] = labelText;
 
    label = new QLabel(labelText);
    labels[fieldIndex] = label;
 
    fieldsModified[fieldIndex] = false;
 
    informations_left_formLayout->addRow(label, tmpEditionWidget);
    //informations_left_formLayout->addRow(label, tmpViewWidget);
 
    setIndexWidget(booksModel->index(row, fieldIndex), tmpEditionWidget);
    //setIndexWidget(booksModel->index(row, fieldIndex), tmpViewWidget);
    /* END: BOOKS_YEAR */
 
 
    /* BEGIN: BOOKS_DESCRIPTION */
    fieldIndex = booksModel->fieldIndex("books_description");
 
    books_description_plainTextEdit = new QPlainTextEdit();
    tmpEditionWidget = books_description_plainTextEdit;
    editionWidgets[fieldIndex] = tmpEditionWidget;
 
    books_description_view_label = new QLabel;
    tmpViewWidget = books_description_view_label;
    viewWidgets[fieldIndex] = tmpViewWidget;
 
    labelText = tr("Description");
    labelTexts[fieldIndex] = labelText;
 
    label = new QLabel(labelText);
    labels[fieldIndex] = label;
 
    fieldsModified[fieldIndex] = false;
 
    informations_left_formLayout->addRow(label, tmpEditionWidget);
    //informations_left_formLayout->addRow(label, tmpViewWidget);
 
    setIndexWidget(booksModel->index(row, fieldIndex), tmpEditionWidget);
    //setIndexWidget(booksModel->index(row, fieldIndex), tmpViewWidget);
    /* END: BOOKS_DESCRIPTION */
 
    informations_hBoxLayout->addLayout(informations_left_formLayout);
 
    informations_right_formLayout = new QFormLayout;
 
 
    /* BEGIN: BOOKS_AUTHORS */
    fieldIndex = booksModel->fieldIndex("books_authors");
 
    authors_widget = new InteractiveListWidget(
                booksModel->getAuthorsFields(),
                authors_fields_completer,
                booksModel->getAuthorsFieldsPattern(),
                1
                );
    tmpEditionWidget = authors_widget;
    editionWidgets[fieldIndex] = tmpEditionWidget;
 
    authors_view_label = new QLabel;
    tmpViewWidget = authors_view_label;
    viewWidgets[fieldIndex] = tmpViewWidget;
 
    labelText = tr("Authors");
    labelTexts[fieldIndex] = labelText;
 
    label = new QLabel(labelText);
    labels[fieldIndex] = label;
 
    fieldsModified[fieldIndex] = false;
 
    informations_right_formLayout->addRow(label, tmpEditionWidget);
    //informations_right_formLayout->addRow(label, tmpViewWidget);
 
    setIndexWidget(booksModel->index(row, fieldIndex), tmpEditionWidget);
    //setIndexWidget(booksModel->index(row, fieldIndex), tmpViewWidget);
    /* END: BOOKS_AUTHORS */
 
    informations_hBoxLayout->addLayout(informations_right_formLayout);
 
    informations_groupBox->setLayout(informations_hBoxLayout);
 
    mainLayout->addWidget(informations_groupBox);
 
    characteristics_groupBox = new QGroupBox(tr("Book characteristics"));
 
    characteristics_hBoxLayout = new QHBoxLayout;
 
    characteristics_left_formLayout = new QFormLayout;
 
 
    /* BEGIN: BOOKS_NBR_PAGES */
    fieldIndex = booksModel->fieldIndex("books_nbr_pages");
 
    books_nbr_pages_spinBox = new QSpinBox();
    books_nbr_pages_spinBox->setRange(0, 2000);
    books_nbr_pages_spinBox->setValue(100);
    books_nbr_pages_spinBox->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::MinimumExpanding);
    tmpEditionWidget = books_nbr_pages_spinBox;
    editionWidgets[fieldIndex] = tmpEditionWidget;
 
    books_nbr_pages_view_label = new QLabel;
    tmpViewWidget = books_nbr_pages_view_label;
    viewWidgets[fieldIndex] = tmpViewWidget;
 
    labelText = tr("Page Number");
    labelTexts[fieldIndex] = labelText;
 
    label = new QLabel(labelText);
    labels[fieldIndex] = label;
 
    fieldsModified[fieldIndex] = false;
 
    characteristics_left_formLayout->addRow(label, tmpEditionWidget);
    //characteristics_left_formLayout->addRow(label, tmpViewWidget);
 
    setIndexWidget(booksModel->index(row, fieldIndex), tmpEditionWidget);
    //setIndexWidget(booksModel->index(row, fieldIndex), tmpViewWidget);
    /* END: BOOKS_NBR_PAGES */
 
 
    /* BEGIN: BOOKS_WEIGHT */
    fieldIndex = booksModel->fieldIndex("books_weight");
 
    books_weight_doubleSpinBox = new QDoubleSpinBox();
    books_weight_doubleSpinBox->setSuffix(" g");
    books_weight_doubleSpinBox->setRange(0, 10000);
    books_weight_doubleSpinBox->setValue(1000);
    books_weight_doubleSpinBox->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::MinimumExpanding);
    tmpEditionWidget = books_weight_doubleSpinBox;
    editionWidgets[fieldIndex] = tmpEditionWidget;
 
    books_weight_view_label = new QLabel;
    tmpViewWidget = books_weight_view_label;
    viewWidgets[fieldIndex] = tmpViewWidget;
 
    labelText = tr("Weight");
    labelTexts[fieldIndex] = labelText;
 
    label = new QLabel(labelText);
    labels[fieldIndex] = label;
 
    fieldsModified[fieldIndex] = false;
 
    characteristics_left_formLayout->addRow(label, tmpEditionWidget);
    //characteristics_left_formLayout->addRow(label, tmpViewWidget);
 
    setIndexWidget(booksModel->index(row, fieldIndex), tmpEditionWidget);
    //setIndexWidget(booksModel->index(row, fieldIndex), tmpViewWidget);
    /* END: BOOKS_WEIGHT */
 
 
    /* BEGIN: BOOKS_WIDTH */
    fieldIndex = booksModel->fieldIndex("books_width");
 
    books_width_doubleSpinBox = new QDoubleSpinBox();
    books_width_doubleSpinBox->setSuffix(" cm");
    books_width_doubleSpinBox->setRange(0, 10000);
    books_width_doubleSpinBox->setValue(1000);
    books_width_doubleSpinBox->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::MinimumExpanding);
    tmpEditionWidget = books_width_doubleSpinBox;
    editionWidgets[fieldIndex] = tmpEditionWidget;
 
    books_width_view_label = new QLabel;
    tmpViewWidget = books_width_view_label;
    viewWidgets[fieldIndex] = tmpViewWidget;
 
    labelText = tr("Width");
    labelTexts[fieldIndex] = labelText;
 
    label = new QLabel(labelText);
    labels[fieldIndex] = label;
 
    fieldsModified[fieldIndex] = false;
 
    characteristics_left_formLayout->addRow(label, tmpEditionWidget);
    //characteristics_left_formLayout->addRow(label, tmpViewWidget);
 
    setIndexWidget(booksModel->index(row, fieldIndex), tmpEditionWidget);
    //setIndexWidget(booksModel->index(row, fieldIndex), tmpViewWidget);
    /* END: BOOKS_WIDTH */
 
 
    /* BEGIN: BOOKS_HEIGHT */
    fieldIndex = booksModel->fieldIndex("books_height");
 
    books_height_doubleSpinBox = new QDoubleSpinBox();
    books_height_doubleSpinBox->setSuffix(" cm");
    books_height_doubleSpinBox->setRange(0, 10000);
    books_height_doubleSpinBox->setValue(1000);
    books_height_doubleSpinBox->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::MinimumExpanding);
    tmpEditionWidget = books_height_doubleSpinBox;
    editionWidgets[fieldIndex] = tmpEditionWidget;
 
    books_height_view_label = new QLabel;
    tmpViewWidget = books_height_view_label;
    viewWidgets[fieldIndex] = tmpViewWidget;
 
    labelText = tr("Height");
    labelTexts[fieldIndex] = labelText;
 
    label = new QLabel(labelText);
    labels[fieldIndex] = label;
 
    fieldsModified[fieldIndex] = false;
 
    characteristics_left_formLayout->addRow(label, tmpEditionWidget);
    //characteristics_left_formLayout->addRow(label, tmpViewWidget);
 
    setIndexWidget(booksModel->index(row, fieldIndex), tmpEditionWidget);
    //setIndexWidget(booksModel->index(row, fieldIndex), tmpViewWidget);
    /* END: BOOKS_HEIGHT */
 
    characteristics_hBoxLayout->addLayout(characteristics_left_formLayout);
 
    characteristics_right_formLayout = new QFormLayout;
 
 
    /* BEGIN: BOOKS_KEYWORDS */
    fieldIndex = booksModel->fieldIndex("books_keywords");
 
    keywords_widget = new InteractiveListWidget(
                booksModel->getKeywordsFields(),
                keywords_fields_completer,
                booksModel->getKeywordsFieldsPattern(),
                1
                );
    tmpEditionWidget = keywords_widget;
    editionWidgets[fieldIndex] = tmpEditionWidget;
 
    keywords_view_label = new QLabel;
    tmpViewWidget = keywords_view_label;
    viewWidgets[fieldIndex] = tmpViewWidget;
 
    labelText = tr("Keywords");
    labelTexts[fieldIndex] = labelText;
 
    label = new QLabel(labelText);
    labels[fieldIndex] = label;
 
    fieldsModified[fieldIndex] = false;
 
    characteristics_right_formLayout->addRow(label, tmpEditionWidget);
    //characteristics_right_formLayout->addRow(label, tmpViewWidget);
 
    setIndexWidget(booksModel->index(row, fieldIndex), tmpEditionWidget);
    //setIndexWidget(booksModel->index(row, fieldIndex), tmpViewWidget);
    /* END: BOOKS_KEYWORDS */
 
    characteristics_hBoxLayout->addLayout(characteristics_right_formLayout);
 
    characteristics_groupBox->setLayout(characteristics_hBoxLayout);
 
    mainLayout->addWidget(characteristics_groupBox);
 
    setLayout(mainLayout);
}
 
void SingleBookView2::startEditingNewBook() {
    if(fieldsModified.values().contains(true)) {
        QMessageBox::StandardButton returnButton =
                QMessageBox::question(this, tr("Modified data unsaved"),
                                      tr("There are some unsaved changes that "
                                         "will be lost if you add a new book. "
                                         "Are you sure?"),
                                      QMessageBox::Yes | QMessageBox::No,
                                      QMessageBox::Yes
                                      );
 
        if(returnButton == QMessageBox::No)
            return;
    }
 
    //model->setFilter("");
 
    int newRow = model->rowCount();
 
    if(!model->insertRow(newRow))
        qDebug() << "Could not insert row";
 
    //dwm->toLast();
 
    for(QMap<unsigned int, bool>::const_iterator it = fieldsModified.constBegin(),
        end = fieldsModified.constEnd(); it != end; ++it)
    {
        modifyField(it.key(), false);
    }
}
 
void SingleBookView2::changeBook(QModelIndex& index) {
    if(fieldsModified.values().contains(true)) {
        QMessageBox::StandardButton returnButton =
                QMessageBox::question(this, tr("Modified data unsaved"),
                                      tr("There are some unsaved changes that "
                                         "will be lost if you change book. "
                                         "Are you sure?"),
                                      QMessageBox::Yes | QMessageBox::No,
                                      QMessageBox::Yes
                                      );
 
        if(returnButton == QMessageBox::No)
            return;
    }
 
    //model->setFilter("id_book = "+ QString::number(id_book));
 
    //dwm->setCurrentModelIndex(index);
 
    for(QMap<unsigned int, bool>::const_iterator it = fieldsModified.constBegin(),
        end = fieldsModified.constEnd(); it != end; ++it)
    {
        modifyField(it.key(), false);
    }
}
 
void SingleBookView2::submit() {
    //dwm->submit();
 
    //model->setFilter("id_book = "+ QString::number(id_book));
 
    for(QMap<unsigned int, bool>::const_iterator it = fieldsModified.constBegin(),
        end = fieldsModified.constEnd(); it != end; ++it)
    {
        modifyField(it.key(), false);
    }
}
 
void SingleBookView2::revert() {
    if(fieldsModified.values().contains(true)) {
        QMessageBox::StandardButton returnButton =
                QMessageBox::question(this, tr("Modified data unsaved"),
                                      tr("There are some unsaved changes that "
                                         "will be lost if you cancel. Are you "
                                         "sure?"),
                                      QMessageBox::Yes | QMessageBox::No,
                                      QMessageBox::Yes
                                      );
 
        if(returnButton == QMessageBox::No)
            return;
    }
 
    //dwm->revert();
 
    for(QMap<unsigned int, bool>::const_iterator it = fieldsModified.constBegin(),
        end = fieldsModified.constEnd(); it != end; ++it)
    {
        modifyField(it.key(), false);
    }
}
 
void SingleBookView2::modifyField(unsigned int section, bool isModified) {
    if(isModified)
        labels.value(section)->setText("<i>"+ labelTexts.value(section) +"</i>");
    else
        labels.value(section)->setText(labelTexts.value(section));
 
    fieldsModified[section] = isModified;
}
 
void SingleBookView2::toNext() {
    if(fieldsModified.values().contains(true)) {
        QMessageBox::StandardButton returnButton =
                QMessageBox::question(this, tr("Modified data unsaved"),
                                      tr("There are some unsaved changes that "
                                         "will be lost if you change book. "
                                         "Are you sure?"),
                                      QMessageBox::Yes | QMessageBox::No,
                                      QMessageBox::Yes
                                      );
 
        if(returnButton == QMessageBox::No)
            return;
    }
 
    //dwm->toNext();
 
    for(QMap<unsigned int, bool>::const_iterator it = fieldsModified.constBegin(),
        end = fieldsModified.constEnd(); it != end; ++it)
    {
        modifyField(it.key(), false);
    }
}
 
void SingleBookView2::toPrevious() {
    if(fieldsModified.values().contains(true)) {
        QMessageBox::StandardButton returnButton =
                QMessageBox::question(this, tr("Modified data unsaved"),
                                      tr("There are some unsaved changes that "
                                         "will be lost if you change book. "
                                         "Are you sure?"),
                                      QMessageBox::Yes | QMessageBox::No,
                                      QMessageBox::Yes
                                      );
 
        if(returnButton == QMessageBox::No)
            return;
    }
 
    //dwm->toPrevious();
 
    for(QMap<unsigned int, bool>::const_iterator it = fieldsModified.constBegin(),
        end = fieldsModified.constEnd(); it != end; ++it)
    {
        modifyField(it.key(), false);
    }
}
 
void SingleBookView2::setEditionEnabled(bool enable) {
 
}
 
QRect SingleBookView2::visualRect(const QModelIndex &index) const {
    if(viewWidgets.contains(index.column())) {
        return viewWidgets.value(index.column())->geometry();
    }
    return QRect();
}
 
void SingleBookView2::scrollTo(const QModelIndex &index, ScrollHint hint) {
    return;
}
 
QModelIndex SingleBookView2::indexAt(const QPoint &point) const {
    for(QMap<unsigned int, QLabel*>::const_iterator it = viewWidgets.constBegin(),
        end = viewWidgets.constEnd(); it != end; ++it)
    {
        if(it.value()->geometry().contains(point)) {
            QModelIndex curIndex = model->index(index.row(), it.key());
            return curIndex;
        }
    }
 
    return QModelIndex();
}
 
QModelIndex SingleBookView2::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers) {
    QModelIndex resIndex;
    QModelIndex curIndex = currentIndex();
 
    switch(cursorAction) {
    case QAbstractItemView::MoveUp:
    case QAbstractItemView::MoveLeft:
    case QAbstractItemView::MovePageUp:
    case QAbstractItemView::MovePrevious:
        if(curIndex.column() == 0)
            resIndex = curIndex;
 
        resIndex = model->index(curIndex.row(), curIndex.column() - 1);
        break;
 
    case QAbstractItemView::MoveDown:
    case QAbstractItemView::MoveRight:
    case QAbstractItemView::MovePageDown:
    case QAbstractItemView::MoveNext:
        if(curIndex.column() == model->columnCount() - 1)
            resIndex = curIndex;
 
        resIndex = model->index(curIndex.row(), curIndex.column() + 1);
        break;
 
    case QAbstractItemView::MoveHome:
        resIndex = model->index(curIndex.row(), 0);
        break;
 
    case QAbstractItemView::MoveEnd:
        resIndex = model->index(curIndex.row(), model->columnCount() - 1);
        break;
    }
 
    return resIndex;
}
 
int SingleBookView2::horizontalOffset() const {
    return 0;
}
 
int SingleBookView2::verticalOffset() const {
    return 0;
}
 
bool SingleBookView2::isIndexHidden(const QModelIndex &index) const {
    return false;
}
 
void SingleBookView2::setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags command) {
    return;
}
 
QRegion SingleBookView2::visualRegionForSelection(const QItemSelection &selection) const {
    return QRect();
}