/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (info@qt.nokia.com)
**
**
** GNU Lesser General Public License Usage
**
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this file.
** Please review the following information to ensure the GNU Lesser General
** Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** Other Usage
**
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
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**************************************************************************/

#ifndef DRAGTOOL_H
#define DRAGTOOL_H

#include "abstractformeditortool.h"
#include "movemanipulator.h"
#include "selectionindicator.h"
#include "resizeindicator.h"

#include <QHash>
#include <QObject>
#include <QScopedPointer>


namespace QmlDesigner {

class DragTool;

namespace Internal {

class TimerHandler : public QObject
{
    Q_OBJECT

public:
    TimerHandler(DragTool *tool) : QObject(), m_dragTool(tool) {}
public slots:
    void clearMoveDelay();

private:
    DragTool *m_dragTool;
};
}

class DragTool : public AbstractFormEditorTool
{
public:
    DragTool(FormEditorView* editorView);
    virtual ~DragTool();

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

    void keyPressEvent(QKeyEvent *event);
    void keyReleaseEvent(QKeyEvent *keyEvent);

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

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

    void updateMoveManipulator();

    void beginWithPoint(const QPointF &beginPoint);


    virtual void dropEvent(QGraphicsSceneDragDropEvent * event);
    virtual void dragEnterEvent(QGraphicsSceneDragDropEvent * event);
    virtual void dragLeaveEvent(QGraphicsSceneDragDropEvent * event);
    virtual void dragMoveEvent(QGraphicsSceneDragDropEvent * event);

    //void beginWithPoint(const QPointF &beginPoint);

    void clear();

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

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

    void clearMoveDelay();

protected:
    void abort();


private:

    void createQmlItemNode(const ItemLibraryEntry &itemLibraryEntry, QmlItemNode parentNode, QPointF scenePos);
    void createQmlItemNodeFromImage(const QString &imageName, QmlItemNode parentNode, QPointF scenePos);
    FormEditorItem* calculateContainer(const QPointF &point, FormEditorItem * currentItem = 0);

    void begin(QPointF scenePos);
    void end(QPointF scenePos);
    void move(QPointF scenePos);

    MoveManipulator m_moveManipulator;
    SelectionIndicator m_selectionIndicator;
    QWeakPointer<FormEditorItem> m_movingItem;
    RewriterTransaction m_rewriterTransaction;
    QmlItemNode m_dragNode;
    QScopedPointer<Internal::TimerHandler> m_timerHandler;
    bool m_blockMove;
    QPointF m_startPoint;
    bool m_Aborted;
};


}
#endif // DRAGTOOL_H
