move the AnnotatorEngine base class and the SmoothPath engine out of the private use of the page view annotator
svn path=/trunk/playground/graphics/okular/; revision=600980remotes/origin/KDE/4.0
Pino Toscano
20 years ago
parent
1285f20c21
commit
fdbd0101a4
4 changed files with 241 additions and 179 deletions
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/***************************************************************************
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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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// qt / kde includes
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#include <qcolor.h> |
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#include <qpainter.h> |
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// local includes
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#include "core/annotations.h" |
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#include "annotationtools.h" |
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AnnotatorEngine::AnnotatorEngine( const QDomElement & engineElement ) |
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: m_engineElement( engineElement ), m_creationCompleted( false ) |
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{ |
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// parse common engine attributes
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if ( engineElement.hasAttribute( "color" ) ) |
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m_engineColor = QColor( engineElement.attribute( "color" ) ); |
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// get the annotation element
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QDomElement annElement = m_engineElement.firstChild().toElement(); |
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if ( !annElement.isNull() && annElement.tagName() == "annotation" ) |
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m_annotElement = annElement; |
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} |
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AnnotatorEngine::~AnnotatorEngine() |
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{ |
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} |
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/** SmoothPathEngine */ |
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SmoothPathEngine::SmoothPathEngine( const QDomElement & engineElement ) |
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: AnnotatorEngine( engineElement ) |
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{ |
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// parse engine specific attributes
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} |
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QRect SmoothPathEngine::event( EventType type, Button button, double nX, double nY, double xScale, double yScale, const Okular::Page * /*page*/ ) |
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{ |
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// only proceed if pressing left button
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if ( button != Left ) |
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return QRect(); |
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// start operation
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if ( type == Press && points.isEmpty() ) |
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{ |
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lastPoint.x = nX; |
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lastPoint.y = nY; |
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totalRect.left = totalRect.right = lastPoint.x; |
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totalRect.top = totalRect.bottom = lastPoint.y; |
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points.append( lastPoint ); |
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} |
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// add a point to the path
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else if ( type == Move && points.count() > 0 ) |
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{ |
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//double dist = hypot( nX - points.last().x, nY - points.last().y );
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//if ( dist > 0.0001 )
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//{
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// append mouse position (as normalized point) to the list
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Okular::NormalizedPoint nextPoint = Okular::NormalizedPoint( nX, nY ); |
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points.append( nextPoint ); |
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// update total rect
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double dX = 2.0 / (double)xScale; |
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double dY = 2.0 / (double)yScale; |
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totalRect.left = qMin( totalRect.left, nX - dX ); |
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totalRect.top = qMin( totalRect.top, nY - dY ); |
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totalRect.right = qMax( nX + dX, totalRect.right ); |
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totalRect.bottom = qMax( nY + dY, totalRect.bottom ); |
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// paint the difference to previous full rect
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Okular::NormalizedRect incrementalRect; |
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incrementalRect.left = qMin( nextPoint.x, lastPoint.x ) - dX; |
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incrementalRect.right = qMax( nextPoint.x, lastPoint.x ) + dX; |
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incrementalRect.top = qMin( nextPoint.y, lastPoint.y ) - dY; |
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incrementalRect.bottom = qMax( nextPoint.y, lastPoint.y ) + dY; |
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lastPoint = nextPoint; |
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return incrementalRect.geometry( (int)xScale, (int)yScale ); |
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//}
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} |
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// terminate process
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else if ( type == Release && points.count() > 0 ) |
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{ |
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if ( points.count() < 2 ) |
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points.clear(); |
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else |
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m_creationCompleted = true; |
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return totalRect.geometry( (int)xScale, (int)yScale ); |
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} |
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return QRect(); |
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} |
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void SmoothPathEngine::paint( QPainter * painter, double xScale, double yScale, const QRect & /*clipRect*/ ) |
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{ |
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// draw SmoothPaths with at least 2 points
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if ( points.count() > 1 ) |
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{ |
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// use engine's color for painting
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painter->setPen( QPen( m_engineColor, 1 ) ); |
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QLinkedList<Okular::NormalizedPoint>::iterator pIt = points.begin(), pEnd = points.end(); |
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Okular::NormalizedPoint pA = *pIt; |
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++pIt; |
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for ( ; pIt != pEnd; ++pIt ) |
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{ |
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Okular::NormalizedPoint pB = *pIt; |
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painter->drawLine( (int)(pA.x * (double)xScale), (int)(pA.y * (double)yScale), |
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(int)(pB.x * (double)xScale), (int)(pB.y * (double)yScale) ); |
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pA = pB; |
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} |
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} |
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} |
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QList< Okular::Annotation* > SmoothPathEngine::end() |
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{ |
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m_creationCompleted = false; |
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// find out annotation's description node
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if ( m_annotElement.isNull() ) |
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return QList< Okular::Annotation* >(); |
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// find out annotation's type
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Okular::Annotation * ann = 0; |
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QString typeString = m_annotElement.attribute( "type" ); |
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// create InkAnnotation from path
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if ( typeString == "Ink" ) |
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{ |
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Okular::InkAnnotation * ia = new Okular::InkAnnotation(); |
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ann = ia; |
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if ( m_annotElement.hasAttribute( "width" ) ) |
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ann->style.width = m_annotElement.attribute( "width" ).toDouble(); |
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// fill points
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ia->inkPaths.append( points ); |
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// set boundaries
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ia->boundary = totalRect; |
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} |
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// safety check
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if ( !ann ) |
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return QList< Okular::Annotation* >(); |
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// set common attributes
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ann->style.color = m_annotElement.hasAttribute( "color" ) ? |
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m_annotElement.attribute( "color" ) : m_engineColor; |
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if ( m_annotElement.hasAttribute( "opacity" ) ) |
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ann->style.opacity = m_annotElement.attribute( "opacity", "1.0" ).toDouble(); |
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// return annotation
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return QList< Okular::Annotation* >() << ann; |
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} |
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@ -0,0 +1,84 @@ |
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/***************************************************************************
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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 <qrect.h> |
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#include "core/area.h" |
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class QPainter; |
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class PageViewItem; |
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namespace Okular { |
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struct 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 Annotation's. |
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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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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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/** @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*/ ); |
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void paint( QPainter * painter, double xScale, double yScale, const QRect & /*clipRect*/ ); |
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QList< Okular::Annotation* > end(); |
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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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}; |
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#endif |
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