/************************************************************************
 **
 **  @file   vshortcutpropertyeditor.cpp
 **  @author hedgeware <internal(at)hedgeware.net>
 **  @date
 **
 **  @brief
 **  @copyright
 **  All rights reserved. This program and the accompanying materials
 **  are made available under the terms of the GNU Lesser General Public License
 **  (LGPL) version 2.1 which accompanies this distribution, and is available at
 **  http://www.gnu.org/licenses/lgpl-2.1.html
 **
 **  This library 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
 **  Lesser General Public License for more details.
 **
 *************************************************************************/

#include "vshortcutpropertyeditor.h"

#include <QEvent>
#include <QHBoxLayout>
#include <QKeyEvent>
#include <QLineEdit>
#include <QSizePolicy>
#include <Qt>

class QHBoxLayout;
class QKeyEvent;

VPE::VShortcutEditWidget::VShortcutEditWidget(QWidget *parent)
    : QWidget(parent), CurrentKeySequence(), LineEdit(nullptr)
{
    // Create the line edit widget
    LineEdit = new QLineEdit(this);
    LineEdit->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    LineEdit->clear();
    LineEdit->installEventFilter(this);
    setFocusProxy(LineEdit);
    connect(LineEdit, &QLineEdit::textEdited, this, &VShortcutEditWidget::onTextEdited);

    // The layout (a horizontal layout)
    QHBoxLayout* layout = new QHBoxLayout(this);
    layout->setSpacing(0);
    layout->setMargin(0);
    layout->addWidget(LineEdit);
}


VPE::VShortcutEditWidget::~VShortcutEditWidget()
{
    // nothing needs to be done here
}

bool VPE::VShortcutEditWidget::eventFilter(QObject *obj, QEvent *event)
{
    if (obj == LineEdit)
    {
        if (event->type() == QEvent::KeyPress)
        {
            QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);

            int keys = keyEvent->key();

            if (keys != Qt::Key_Shift &&
               keys != Qt::Key_Control &&
               keys != Qt::Key_Meta &&
               keys != Qt::Key_AltGr &&
               keys != Qt::Key_Alt)
            {
                keys += keyEvent->modifiers();
                setShortcut(QKeySequence(keys), true);
                return true;
            }
        }
    }

    return QWidget::eventFilter(obj, event);
}

QString VPE::VShortcutEditWidget::getShortcutAsString() const
{
    return CurrentKeySequence.toString();
}

// cppcheck-suppress unusedFunction
QKeySequence VPE::VShortcutEditWidget::getShortcut()
{
    return CurrentKeySequence;
}

void VPE::VShortcutEditWidget::setShortcut(const QString &shortcut, bool emit_signal)
{
    setShortcut(QKeySequence::fromString(shortcut), emit_signal);
}

void VPE::VShortcutEditWidget::setShortcut(const QKeySequence &shortcut, bool emit_signal)
{
    if (shortcut != CurrentKeySequence)
    {
        CurrentKeySequence = shortcut;
        LineEdit->setText(CurrentKeySequence.toString());
        if (emit_signal)
        {
            emit dataChangedByUser(CurrentKeySequence, this);
        }
    }
}

void VPE::VShortcutEditWidget::onTextEdited(const QString &text)
{
    setShortcut(text, true);
}