F:/KPlato/koffice/libs/kofficeui/KoGuides.h

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// -*- Mode: c++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 4; -*-
/* This file is part of the KDE project
   Copyright (C) 2005 Thorsten Zachmann <zachmann@kde.org>
   Copyright (C) 2005 Casper Boemann Rasmussen <cbr@boemann.dk>

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

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.
*/

#ifndef KOGUIDES_H
#define KOGUIDES_H

#include <QEvent>
#include <QObject>
//Added by qt3to4:
#include <QMouseEvent>
#include <QList>
#include <QKeyEvent>

#include <koffice_export.h>

class QPaintDevice;
class KoPoint;
class KoRect;
class KoView;
class KoZoomHandler;

class KOFFICEUI_EXPORT KoGuides : public QObject
{
    Q_OBJECT
public:        
    KoGuides( KoView *view, KoZoomHandler *zoomHandler );

    ~KoGuides();
        
    void paintGuides( QPainter &painter );

    typedef int SnapStatus;
    static const SnapStatus SNAP_NONE, SNAP_HORIZ, SNAP_VERT, SNAP_BOTH;

    bool mousePressEvent( QMouseEvent *e );

    bool mouseMoveEvent( QMouseEvent *e );
    
    bool mouseReleaseEvent( QMouseEvent *e );
    
    bool keyPressEvent( QKeyEvent *e );

    void setGuideLines( const QList<double> &horizontalPos, const QList<double> &verticalPos );

    void setAutoGuideLines( const QList<double> &horizontalPos, const QList<double> &verticalPos );

    void getGuideLines( QList<double> &horizontalPos, QList<double> &verticalPos ) const;

    void snapToGuideLines( KoRect &rect, int snap, SnapStatus &snapStatus, KoPoint &diff );

    void snapToGuideLines( KoPoint &pos, int snap, SnapStatus &snapStatus, KoPoint &diff );

    void repaintSnapping( const KoRect &snappedRect );

    void repaintSnapping( const KoPoint &snappedPoint, SnapStatus snapStatus );

    void repaintAfterSnapping( );

    void diffNextGuide( KoRect &rect, KoPoint &diff );

public slots:
    void moveGuide( const QPoint &pos, bool horizontal, int rulerWidth );

    void addGuide( const QPoint &pos, bool horizontal, int rulerWidth );

signals:
    void guideLinesChanged( KoView * view );

    void moveGuides( bool state );

    void paintGuides( bool state );

private slots:
    void slotChangePosition();

    void slotRemove();

private:
    struct KoGuideLine 
    {
        KoGuideLine( Qt::Orientation o, double pos, bool a = false )
        : orientation( o )
        , position( pos )
        , selected( false )
        , snapping( false )
        , automatic( a )
        {}
        Qt::Orientation orientation;
        double position;
        bool selected; // if this guide is selected
        bool snapping; // if this guide is being snapped to
        bool automatic; // if this is a atomatic guide line
    };

    void paint();

    void add( Qt::Orientation o, QPoint &pos );
    
    void select( KoGuideLine *guideLine );

    void unselect( KoGuideLine *guideLine );
        
    bool unselectAll();

    void removeSelected();

    bool hasSelected();

    KoGuideLine * find( KoPoint &p, double diff );

    void moveSelectedBy( QPoint &p );

    KoPoint mapFromScreen( const QPoint & pos );

    QPoint mapToScreen( const KoPoint & pos );

    bool virtuallyEqual( double a, double b ) { return QABS( a - b ) < 1E-4; }

    KoView * m_view;
    KoZoomHandler * m_zoomHandler;

    enum GuideLineType
    {
        GL,
        GL_SELECTED, 
        GL_AUTOMATIC,
        GL_END
    };

    QList<KoGuideLine *> m_guideLines[GL_END];
    
    QPoint m_lastPoint;
    bool m_mouseSelected;
    bool m_insertGuide;
    class Popup;
    Popup * m_popup;
};

#endif /* KOGUIDES_H */

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