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/****************************************************************************
**
** Copyright (C) 2016 Jochen Becher
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** 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.
**
****************************************************************************/
#pragma once
#include <QObject>
#include "qmt/infrastructure/qmt_global.h"
#include "capabilities/latchable.h"
QT_BEGIN_NAMESPACE
class QGraphicsScene;
class QGraphicsSceneMouseEvent;
class QKeyEvent;
QT_END_NAMESPACE
namespace qmt {
class DiagramController;
class DiagramSceneModel;
class AlignLineItem;
class QMT_EXPORT LatchController : public QObject
{
Q_OBJECT
public:
explicit LatchController(QObject *parent = 0);
~LatchController() override;
void setDiagramSceneModel(DiagramSceneModel *diagramSceneModel);
void addToGraphicsScene(QGraphicsScene *graphicsScene);
void removeFromGraphicsScene(QGraphicsScene *graphicsScene);
void keyPressEventLatching(QKeyEvent *event);
void keyReleaseEventLatching(QKeyEvent *event);
void mousePressEventLatching(QGraphicsSceneMouseEvent *event);
void mouseMoveEventLatching(QGraphicsSceneMouseEvent *event);
void mouseReleaseEventLatching(QGraphicsSceneMouseEvent *event);
private:
void handleLatches();
void hideLatches();
void applyLatches();
private:
DiagramSceneModel *m_diagramSceneModel;
AlignLineItem *m_horizontalAlignLine;
AlignLineItem *m_verticalAlignLine;
bool m_foundHorizontalLatch;
ILatchable::Latch m_horizontalLatch;
qreal m_horizontalDist;
bool m_foundVerticalLatch;
ILatchable::Latch m_verticalLatch;
qreal m_verticalDist;
};
} // namespace qmt
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