qt5base-lts/examples/widgets/itemviews/spreadsheet/spreadsheetdelegate.cpp

/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of The Qt Company Ltd nor the names of its
**     contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "spreadsheetdelegate.h"

#include <QtWidgets>

SpreadSheetDelegate::SpreadSheetDelegate(QObject *parent)
        : QItemDelegate(parent) {}

QWidget *SpreadSheetDelegate::createEditor(QWidget *parent,
                                          const QStyleOptionViewItem &,
                                          const QModelIndex &index) const
{
    if (index.column() == 1) {
        QDateTimeEdit *editor = new QDateTimeEdit(parent);
        editor->setDisplayFormat("dd/M/yyyy");
        editor->setCalendarPopup(true);
        return editor;
    }

    QLineEdit *editor = new QLineEdit(parent);

    // create a completer with the strings in the column as model
    QStringList allStrings;
    for (int i = 1; i<index.model()->rowCount(); i++) {
        QString strItem(index.model()->data(index.sibling(i, index.column()),
            Qt::EditRole).toString());

        if (!allStrings.contains(strItem))
            allStrings.append(strItem);
    }

    QCompleter *autoComplete = new QCompleter(allStrings);
    editor->setCompleter(autoComplete);
    connect(editor, &QLineEdit::editingFinished, this, &SpreadSheetDelegate::commitAndCloseEditor);
    return editor;
}

void SpreadSheetDelegate::commitAndCloseEditor()
{
    QLineEdit *editor = qobject_cast<QLineEdit *>(sender());
    emit commitData(editor);
    emit closeEditor(editor);
}

void SpreadSheetDelegate::setEditorData(QWidget *editor,
    const QModelIndex &index) const
{
    QLineEdit *edit = qobject_cast<QLineEdit*>(editor);
    if (edit) {
        edit->setText(index.model()->data(index, Qt::EditRole).toString());
        return;
    }

    QDateTimeEdit *dateEditor = qobject_cast<QDateTimeEdit *>(editor);
    if (dateEditor) {
        dateEditor->setDate(QDate::fromString(
                                index.model()->data(index, Qt::EditRole).toString(),
                                "d/M/yyyy"));
    }
}

void SpreadSheetDelegate::setModelData(QWidget *editor,
    QAbstractItemModel *model, const QModelIndex &index) const
{
    QLineEdit *edit = qobject_cast<QLineEdit *>(editor);
    if (edit) {
        model->setData(index, edit->text());
        return;
    }

    QDateTimeEdit *dateEditor = qobject_cast<QDateTimeEdit *>(editor);
    if (dateEditor)
        model->setData(index, dateEditor->date().toString("dd/M/yyyy"));
}