/****************************************************************************
**
** Copyright (C) 2020 The Qt Company Ltd.
** 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
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** 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.
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****************************************************************************/
#pragma once

#include "abstractcustomtool.h"
#include "selectionindicator.h"

#include <QGraphicsLineItem>
#include <QHash>
#include <QPointer>

#include <memory>

namespace QmlDesigner {

class TransitionTool : public QObject, public AbstractCustomTool
{
    Q_OBJECT
public:
    TransitionTool();
    ~TransitionTool();

    void mousePressEvent(const QList<QGraphicsItem*> &itemList,
                         QGraphicsSceneMouseEvent *event) override;
    void mouseMoveEvent(const QList<QGraphicsItem*> &itemList,
                        QGraphicsSceneMouseEvent *event) override;
    void mouseReleaseEvent(const QList<QGraphicsItem*> &itemList,
                           QGraphicsSceneMouseEvent *event) override;
    void mouseDoubleClickEvent(const QList<QGraphicsItem*> &itemList,
                               QGraphicsSceneMouseEvent *event) override;
    void hoverMoveEvent(const QList<QGraphicsItem*> &itemList,
                        QGraphicsSceneMouseEvent *event) override;
    void keyPressEvent(QKeyEvent *event) override;
    void keyReleaseEvent(QKeyEvent *keyEvent) override;

    void dragLeaveEvent(const QList<QGraphicsItem*> &itemList,
                        QGraphicsSceneDragDropEvent * event) override;
    void dragMoveEvent(const QList<QGraphicsItem*> &itemList,
                       QGraphicsSceneDragDropEvent * event) override;

    void itemsAboutToRemoved(const QList<FormEditorItem*> &itemList) override;

    void selectedItemsChanged(const QList<FormEditorItem*> &itemList) override;

    void instancesCompleted(const QList<FormEditorItem*> &itemList) override;
    void instancesParentChanged(const QList<FormEditorItem *> &itemList) override;
    void instancePropertyChange(const QList<QPair<ModelNode, PropertyName> > &propertyList) override;

    void clear() override;

    void formEditorItemsChanged(const QList<FormEditorItem*> &itemList) override;

    int wantHandleItem(const ModelNode &modelNode) const override;

    QString name() const override;

    void activateTool();
    void unblock();

    QGraphicsLineItem *lineItem();
    QGraphicsRectItem *rectangleItem1();
    QGraphicsRectItem *rectangleItem2();

private:
    FormEditorItem *currentFormEditorItem() const;
    void createItems();
    void createTransition(FormEditorItem *item1, FormEditorItem *item2);

    FormEditorItem* m_formEditorItem;
    std::unique_ptr<QGraphicsLineItem> m_lineItem;
    std::unique_ptr<QGraphicsRectItem> m_rectangleItem1;
    std::unique_ptr<QGraphicsRectItem> m_rectangleItem2;
    bool m_blockEvents = true;
};

} //QmlDesigner
