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/*
 For general Scribus (>=1.3.2) copyright and licensing information please refer
 to the COPYING file provided with the program. Following this notice may exist
 a copyright and/or license notice that predates the release of Scribus 1.3.2
 for which a new license (GPL+exception) is in place.
 */

/***************************************************************************
*                                                                         *
*   This program is free software; you can redistribute it and/or modify  *
*   it under the terms of the GNU General Public License as published by  *
*   the Free Software Foundation; either version 2 of the License, or     *
*   (at your option) any later version.                                   *
*                                                                         *
***************************************************************************/




#ifndef CANVAS_GESTURE_LINEMOVE_H
#define CANVAS_GESTURE_LINEMOVE_H

#include <QRectF>

#include "scribusapi.h"
#include "canvasgesture.h"
#include "canvasmode.h"

class QDragEnterEvent;
class QDragMoveEvent;
class QDragLeaveEvent;
class QDropEvent;
class QEvent;
class QInputMethodEvent;
class QMouseEvent;
class QKeyEvent;
class QPainter;
class QRubberBand;
class PageItem;
class PageItem_Line;

/**
  This class realizes moving the endpoints of a line on behalf of its parent mode.
  The user presses the mousebutton at one endpoint of the line, drags it to a new position
  and releases the mousebutton.
 
  When the parent mode becomes active again, it can retrieve the new line with endPoint().
 
  If the constructur with a pageitem is used, the gesture will change the item directly.
 */

class SCRIBUS_API LineMove : public CanvasGesture
{
public:
        explicit LineMove (CanvasMode* parent): CanvasGesture(parent), m_haveLineItem(false), m_useOriginAsEndpoint(false), m_bounds(0,0,0,0), m_line(NULL) {}
        virtual ~LineMove() {}
       
        /**
                Prepare a LineMove without attached PageItem
         */

        void prepare(QPointF start, QPointF end);
       
        /** Prepare a LineMove gesture for a PageItem_Line.
            useOriginAsEndpoint allows to drag the origin (topleft) in the same way as the other end.
        */

        void prepare(PageItem_Line* line, bool useOriginAsEndpoint = false);
       
        void clear();
       
        virtual void activate(bool);
        virtual void deactivate(bool);
        virtual void mouseReleaseEvent(QMouseEvent *m);
        virtual void mouseMoveEvent(QMouseEvent *m);
        /**
                prepares the LineMove for the the current selection. Sets 'haveLineItem'
                to false if the current selection is not a single lineitem.
         */

        virtual void mousePressEvent(QMouseEvent *m);
        virtual void drawControls(QPainter*);
       
        void setStartPoint(QPointF canvasStart);
        void setEndPoint(QPointF canvasEnd);

        QPointF startPoint() const { return m_bounds.topLeft(); }
        QPointF endPoint() const { return m_bounds.bottomRight(); }

        bool haveLineItem() const { return m_haveLineItem; }
       
private:
        bool      m_haveLineItem;
        bool      m_useOriginAsEndpoint;
        QRectF    m_bounds;
        QRectF    m_initialBounds;
        PageItem* m_line;
        void adjustBounds(QMouseEvent* m, bool updateCanvas = true);
        void doResize();
        void setRotation(double rot);
        double rotation() const;
        double length() const;
};


#endif