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/****************************************************************************
**
** Copyright (C) 2012 Thorbjørn Lund Martsum - tmartsum[at]gmail.com
** Contact: https://www.qt.io/licensing/
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QLineEdit>
#include <QApplication>
#include <QTableView>
#include <QStandardItemModel>
#include <QItemDelegate>
#include <QDebug>
#include <QComboBox>
class ExampleEditor : public QLineEdit
{
public:
ExampleEditor(QWidget *parent = nullptr):QLineEdit(parent) { qDebug() << "ctor"; }
~ExampleEditor() { QApplication::instance()->quit(); }
};
class ExampleDelegate : public QItemDelegate
{
public:
ExampleDelegate() : QItemDelegate()
{
m_editor = new ExampleEditor(0);
m_combobox = new QComboBox(0);
m_combobox->addItem(QString::fromUtf8("item1"));
m_combobox->addItem(QString::fromUtf8("item2"));
}
protected:
QWidget* createEditor(QWidget *p, const QStyleOptionViewItem &o, const QModelIndex &i) const
{
// doubleclick rownumber 3 (last row) to see the difference.
if (i.row() == 3) {
m_combobox->setParent(p);
m_combobox->setGeometry(o.rect);
return m_combobox;
} else {
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* w, const QModelIndex &) const
{
QComboBox *combobox = qobject_cast<QComboBox*>(w);
if (combobox) {
qDebug() << "Try to show popup at once";
// Now we could try to make a call to
// QCoreApplication::processEvents();
// But it does not matter. The fix:
// https://codereview.qt-project.org/40608
// is blocking QComboBox from reacting to this doubleclick edit event
// and we need to do that since the mouseReleaseEvent has not yet happened,
// and therefore cannot be processed.
combobox->showPopup();
}
}
~ExampleDelegate() { delete m_editor; }
mutable ExampleEditor *m_editor;
mutable QComboBox *m_combobox;
};
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();
}
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