/****************************************************************************
**
** Copyright (C) 2012 Thorbjørn Lund Martsum - tmartsum[at]gmail.com
** Contact: http://www.qt-project.org/
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
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** $QT_END_LICENSE$
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****************************************************************************/

#include <QtWidgets/QtWidgets>

class ExampleEditor : public QLineEdit
{
public:
    ExampleEditor(QWidget *parent = 0):QLineEdit(parent) { qDebug() << "ctor"; }
    ~ExampleEditor() { QApplication::instance()->quit(); }
};

class ExampleDelegate : public QItemDelegate
{
public:
    ExampleDelegate():QItemDelegate() { m_editor = new ExampleEditor(0); }
protected:
    QWidget* createEditor(QWidget *p, const QStyleOptionViewItem &o, const QModelIndex &) const
    {
        m_editor->setParent(p);
        m_editor->setGeometry(o.rect);
        return m_editor;
    }
    void destroyEditor(QWidget *editor, const QModelIndex &) const
    {
        editor->setParent(0);
        qDebug() << "intercepted destroy :)";
    }

    // Avoid setting data - and therefore show that the editor keeps its state.
    void setEditorData(QWidget*, const QModelIndex &) const { }

    ~ExampleDelegate() { delete m_editor; }
    mutable ExampleEditor *m_editor;
};

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QTableView tv;
    QStandardItemModel m;
    m.setRowCount(4);
    m.setColumnCount(2);
    tv.setModel(&m);
    tv.show();
    tv.setItemDelegate(new ExampleDelegate());
    app.exec();
}