QDataWidgetMapper, QStyledItemDelegate et createEditor()

**IXaMaXI** · 08/08/2011, 15h01

Bonjour à tous,

Après quelques recherches infructueuses sur internet et pas plus de succès sur #qt et #qt-fr sur freenode, je me permets de vous exposer mon problème en espérant que vous pourrez m'aider

Je développe une petite application qui utilise un QSqlTableModel modifié (ajout de deux colonnes supplémentaires, rien d'incroyable). J'ai également codé un QStyledItemDelegate perso qui me permet d'afficher les deux colonnes supplémentaires dans une QTableView.

Pour éditer chacune des row du modèle, j'aimerais plutôt utiliser un widget perso qui utilise un QDataWidgetMapper pour mapper les différentes sections du modèle vers des widgets. Dans un premier temps, j'avais directement mappé les section vers des widgets permettant l'édition (des QLineEdit, un widget perso pour les deux colonnes ajoutées au modèle,...).

J'avais également besoin d'une possibilité d'afficher simplement les données sans permettre l'édition et je m'étais dit qu'il me suffirait d'utiliser setEnabled pour désactiver les widget. Mais après y avoir repensé cette solution de me satisfait pas et je préfèrerais obtenir avec QDataWidgetMapper un comportement identique à celui qu'on peut avoir dans une QTableView (c'est-à-dire remplacer le QLabel utilisé pour afficher les données par un QWidget permettant de les éditer.

J'ai donc pensé qu'il me suffirait de remplacer les widget d'édition par des QLabel (ça, ça fonctionne) pour l'affichage et à changer le delegate pour permettre l'édition.

1) Malheureusement, je ne comprends pas comment je dois faire pour appeler QStyledItemDelegate::createEditor() suite à un évenement (je voudrais créer les editor pour toutes les sections en une fois, suite au clic sur un bouton "Édition"). Comment faire ?

2) Est-ce seulement possible ou vais-je devoir faire dériver le widget, utilisant QDataWidgetMapper, de QAbstractItemView (et donc ne plus utiliser le QDataWidgetMapper) ?

Merci d'avance pour vos réponses !

@micalement,

ixM`

**IXaMaXI** · 14/08/2011, 14h05

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();
}

**IXaMaXI** · 15/08/2011, 10h48

Finalement sur les conseils de PasNox de #qt-fr, j'ai opté pour un QStackedWidget perso qui s'occupe de changer le widget affiché et le mapping (du QDataWidgetMapper) en fonction du mode choisi (édition ou vue).

Ce n'est pas satisfaisant de mon point de vue parce qu'il doit certainement y avoir moyen d'obtenir avec QDataWidgetMapper le même comportement qu'avec n'importe quelle autre vue (donc "affichage des données du modèle et après un certain event, affichage des éditeurs appropriés pour l'édition de ces données avec l'utilisation d'un delegate approprié").

Mais je ne trouve pas comment faire et personne ne semble pouvoir m'aider donc je vais me contenter de l'autre solution dans un premier temps et je suis ouvert à toute suggestion et toute piste me permettant de réaliser ça comme je le voudrais

Merci à PasNox

Ciao

QDataWidgetMapper, QStyledItemDelegate et createEditor()

Qt

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