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// Copyright (C) 2016 Jochen Becher
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#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 = nullptr);
~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 = nullptr;
AlignLineItem *m_horizontalAlignLine = nullptr;
AlignLineItem *m_verticalAlignLine = nullptr;
bool m_foundHorizontalLatch = false;
ILatchable::Latch m_horizontalLatch;
qreal m_horizontalDist = 0.0;
bool m_foundVerticalLatch = false;
ILatchable::Latch m_verticalLatch;
qreal m_verticalDist = 0.0;
};
} // namespace qmt
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