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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_RULERMOVE_H
#define CANVAS_GESTURE_RULERMOVE_H

#include <QPoint>

class QCursor;
class QDragEnterEvent;
class QDragMoveEvent;
class QDragLeaveEvent;
class QDropEvent;
class QEvent;
class QInputMethodEvent;
class QMouseEvent;
class QKeyEvent;
class QPainter;

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

class ScribusMainWindow;
class ScribusView;

/**
  This class realizes the moving of guides and the moving of the ruler origin
 */

class SCRIBUS_API RulerGesture : public CanvasGesture
{
                Q_OBJECT
        public:
                enum Mode { HORIZONTAL, VERTICAL, ORIGIN };
                RulerGesture (ScribusView* view, Mode mode);
                ~RulerGesture() override = default;

                /**
                Prepares the gesture for 'mode' without using an existing guide. If 'mode' is HORIZONTAL
                or VERTICAL, a new guide will be created when the mouse is moved over a page.
         */

                void prepare(Mode mode);
                void clear();

                void drawControls(QPainter* p) override;
                void activate(bool) override;
                void deactivate(bool) override;
                void keyPressEvent(QKeyEvent* event) override;
                void mouseReleaseEvent(QMouseEvent *m) override;
                void mouseMoveEvent(QMouseEvent *m) override;
                /**
          This method should be called when the mousebutton is pressed.
          If there's a moveable guide near this position, it prepares the gesture for moving this guide.
         */

                void mousePressEvent(QMouseEvent *m) override;

                Mode getMode() { return m_mode; }
                /**
                Use this to test if there's a moveable guide near this position.
                It prepares the gesture for moving this guide.
         */

                bool mouseHitsGuide(const FPoint& mousePointDoc);
                /**
          It tests for a guide near position, that guide being moveable or not.
          If the test results in success, emits guideInfo;
        */

                void mouseSelectGuide(QMouseEvent *m);
        private:
                FPoint m_mousePoint;
                Mode m_mode;
                QCursor m_cursor;
                QPoint m_xy;
                ScribusMainWindow* m_ScMW {nullptr};
                bool m_haveCursor {false};
                bool m_haveGuide {false};
                double m_currentGuide {0.0};
                double m_guide {0.0};
                int m_page {0};

                void movePoint(QMouseEvent *m, bool mouseRelease);

        signals:
                void guideInfo(int /*direction*/, qreal /*position*/);
};


#endif