mirror of
https://invent.kde.org/graphics/okular
synced 2024-09-29 12:44:01 +00:00
b44d70a6f2
Extend the drawing tool section in top bar with an eraser tool, which removes parts of the lines that have been drawn before. FEATURE: 343774 REVIEW: 124689
111 lines
3.7 KiB
C++
111 lines
3.7 KiB
C++
/***************************************************************************
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* Copyright (C) 2005 by Enrico Ros <eros.kde@email.it> *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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***************************************************************************/
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#ifndef _OKULAR_ANNOTATIONTOOLS_H_
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#define _OKULAR_ANNOTATIONTOOLS_H_
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#include <qdom.h>
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#include <qlinkedlist.h>
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#include <qpainter.h>
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#include <qpen.h>
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#include <qrect.h>
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#include "core/area.h"
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class QMouseEvent;
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class QTabletEvent;
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class PageViewItem;
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namespace Okular {
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class Annotation;
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class Page;
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}
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/**
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* @short Engine: filter events to distill Annotations.
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*/
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class AnnotatorEngine
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{
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public:
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AnnotatorEngine( const QDomElement & engineElement );
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virtual ~AnnotatorEngine();
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// enum definitions
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enum EventType { Press, Move, Release };
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enum Button { None, Left, Right };
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// perform operations
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virtual QRect event( EventType type, Button button, double nX, double nY, double xScale, double yScale, const Okular::Page * page ) = 0;
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virtual void paint( QPainter * painter, double xScale, double yScale, const QRect & clipRect ) = 0;
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virtual QList< Okular::Annotation* > end() = 0;
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// query creation state
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//PageViewItem * editingItem() const { return m_lockedItem; }
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bool creationCompleted() const { return m_creationCompleted; }
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void setItem( PageViewItem * item ) { m_item = item; }
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static void decodeEvent( const QMouseEvent * mouseEvent, EventType * eventType, Button * button );
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static void decodeEvent( const QTabletEvent * tabletEvent, EventType * eventType, Button * button );
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virtual QCursor cursor() const;
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protected:
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PageViewItem * item() { return m_item; }
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// common engine attributes (the element includes annotation desc)
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QDomElement m_engineElement;
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QDomElement m_annotElement;
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QColor m_engineColor;
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// other vars (remove this!)
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bool m_creationCompleted;
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private:
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PageViewItem * m_item;
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};
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class SmoothPath
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{
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public:
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SmoothPath( const QLinkedList<Okular::NormalizedPoint> &points, const QPen &pen, qreal opacity = 1.0, QPainter::CompositionMode compositionMode = QPainter::CompositionMode_SourceOver );
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void paint( QPainter * painter, double xScale, double yScale ) const;
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private:
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const QLinkedList<Okular::NormalizedPoint> points;
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const QPen pen;
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const qreal opacity;
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const QPainter::CompositionMode compositionMode;
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};
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/** @short SmoothPathEngine */
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class SmoothPathEngine
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: public AnnotatorEngine
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{
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public:
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SmoothPathEngine( const QDomElement & engineElement );
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QRect event( EventType type, Button button, double nX, double nY, double xScale, double yScale, const Okular::Page * /*page*/ ) Q_DECL_OVERRIDE;
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void paint( QPainter * painter, double xScale, double yScale, const QRect & /*clipRect*/ ) Q_DECL_OVERRIDE;
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// These are two alternative ways to get the resulting path. Don't call them both!
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QList< Okular::Annotation* > end() Q_DECL_OVERRIDE;
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SmoothPath endSmoothPath();
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private:
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// data
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QLinkedList<Okular::NormalizedPoint> points;
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Okular::NormalizedRect totalRect;
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Okular::NormalizedPoint lastPoint;
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QPainter::CompositionMode compositionMode;
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};
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#endif
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/* kate: replace-tabs on; indent-width 4; */
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