okular/ui/annotationtools.h

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/***************************************************************************
* Copyright (C) 2005 by Enrico Ros <eros.kde@email.it> *
* *
* 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 _OKULAR_ANNOTATIONTOOLS_H_
#define _OKULAR_ANNOTATIONTOOLS_H_
#include <qdom.h>
#include <qlinkedlist.h>
#include <qrect.h>
#include "core/area.h"
class QPainter;
class PageViewItem;
namespace Okular {
class Annotation;
class Page;
}
/**
* @short Engine: filter events to distill Annotation's.
*/
class AnnotatorEngine
{
public:
AnnotatorEngine( const QDomElement & engineElement );
virtual ~AnnotatorEngine();
// enum definitions
enum EventType { Press, Move, Release };
enum Button { None, Left, Right };
// perform operations
virtual QRect event( EventType type, Button button, double nX, double nY, double xScale, double yScale, const Okular::Page * page ) = 0;
virtual void paint( QPainter * painter, double xScale, double yScale, const QRect & clipRect ) = 0;
virtual QList< Okular::Annotation* > end() = 0;
// query creation state
//PageViewItem * editingItem() const { return m_lockedItem; }
bool creationCompleted() const { return m_creationCompleted; }
void setItem( PageViewItem * item ) { m_item = item; }
protected:
PageViewItem * item() { return m_item; }
// common engine attributes (the element includes annotation desc)
QDomElement m_engineElement;
QDomElement m_annotElement;
QColor m_engineColor;
// other vars (remove this!)
bool m_creationCompleted;
private:
PageViewItem * m_item;
};
/** @short SmoothPathEngine */
class SmoothPathEngine
: public AnnotatorEngine
{
public:
SmoothPathEngine( const QDomElement & engineElement );
QRect event( EventType type, Button button, double nX, double nY, double xScale, double yScale, const Okular::Page * /*page*/ );
void paint( QPainter * painter, double xScale, double yScale, const QRect & /*clipRect*/ );
QList< Okular::Annotation* > end();
private:
// data
QLinkedList<Okular::NormalizedPoint> points;
Okular::NormalizedRect totalRect;
Okular::NormalizedPoint lastPoint;
};
#endif