menuOnlyForEnter.h

/* ********************************************************************
    itom software
    URL: http://www.uni-stuttgart.de/ito
    Copyright (C) 2020, Institut für Technische Optik (ITO),
    Universität Stuttgart, Germany
 
    This file is part of itom.
 
    itom is free software; you can redistribute it and/or modify it
    under the terms of the GNU Library General Public Licence as published by
    the Free Software Foundation; either version 2 of the Licence, or (at
    your option) any later version.
 
    itom is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library
    General Public Licence for more details.
 
    You should have received a copy of the GNU Library General Public License
    along with itom. If not, see <http://www.gnu.org/licenses/>.
 
    This class is a port of the Python class TabSwitcherWidget
    of the Spyder IDE (https://github.com/spyder-ide),
    licensed under the MIT License and developed by the Spyder Project
    Contributors.
*********************************************************************** */
 
#pragma once
 
#include <qmenu.h>
#include <qevent.h>
#include <qapplication.h>
 
namespace ito
{
 
/*
The class executes the selected action when "enter key" is input.
If a input of keyboard is not the "enter key", the menu is closed and
the input is inserted to code editor.
*/
class MenuOnlyForEnter : public QMenu
{
public:
    explicit MenuOnlyForEnter(QWidget *parent = nullptr) :
        QMenu(parent),
        m_pEditor(parent)
    {
    }
 
protected:
    void keyPressEvent(QKeyEvent *e)
    {
        if (e->key() != Qt::Key_Enter &&
            e->key() != Qt::Key_Return)
        {
            e->accept();
 
            if (m_pEditor)
            {
                QKeyEvent ev2(e->type(),
                    e->key(),
                    e->modifiers(),
                    e->text(),
                    e->isAutoRepeat(),
                    e->count());
                QApplication::sendEvent(m_pEditor, &ev2);
            }
 
            close();
        }
        else
        {
            QMenu::keyPressEvent(e);
        }
    }
 
private:
    QWidget *m_pEditor;
};
 
} //end namespace ito