mirror of
https://invent.kde.org/graphics/okular
synced 2024-11-05 18:34:53 +00:00
628 lines
22 KiB
C++
628 lines
22 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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// qt / kde includes
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#include <qfile.h>
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#include <qcolor.h>
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#include <qevent.h>
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#include <qpainter.h>
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#include <kiconloader.h>
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#include <klocale.h>
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#include <kstandarddirs.h>
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#include <kinputdialog.h>
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#include <kuser.h>
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#include <kdebug.h>
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// system includes
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#include <math.h>
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// local includes
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#include "core/document.h"
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#include "core/page.h"
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#include "core/annotations.h"
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#include "settings.h"
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#include "pageview.h"
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#include "pageviewutils.h"
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#include "pageviewannotator.h"
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/**
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* @short Engine: filter events to distill an Annotation.
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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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: 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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}
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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 ) = 0;
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virtual void paint( QPainter * painter, double xScale, double yScale, const QRect & clipRect ) = 0;
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virtual 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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protected:
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// common engine attributes (the element includes annotation desc)
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QDomElement m_engineElement;
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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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};
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/** @short SmoothPathEngine */
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class SmoothPathEngine : public AnnotatorEngine
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{
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public:
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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 event( EventType type, Button button, double nX, double nY, double xScale, double yScale )
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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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NormalizedPoint nextPoint = 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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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 paint( QPainter * painter, double xScale, double yScale, const QRect & /*clipRect*/ )
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{
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// draw SmoothPaths whith 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<NormalizedPoint>::iterator pIt = points.begin(), pEnd = points.end();
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NormalizedPoint pA = *pIt;
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++pIt;
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for ( ; pIt != pEnd; ++pIt )
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{
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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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Annotation * end()
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{
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// find out annotation's description node
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const QDomElement & annElement = m_engineElement.firstChild().toElement();
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if ( annElement.isNull() || annElement.tagName() != "annotation" )
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return 0;
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// find out annotation's type
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Annotation * ann = 0;
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QString typeString = annElement.attribute( "type" );
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// create HighlightAnnotation from path
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if ( typeString == "Highlight" )
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{
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HighlightAnnotation * ha = new HighlightAnnotation();
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ann = ha;
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// TODO
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}
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// create InkAnnotation from path
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else if ( typeString == "Ink" )
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{
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InkAnnotation * ia = new InkAnnotation();
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ann = ia;
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if ( annElement.hasAttribute( "width" ) )
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ann->style.width = annElement.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 0;
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// set common attributes
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ann->style.color = annElement.hasAttribute( "color" ) ?
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annElement.attribute( "color" ) : m_engineColor;
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if ( annElement.hasAttribute( "opacity" ) )
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ann->style.opacity = annElement.attribute( "opacity" ).toDouble();
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// return annotation
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return ann;
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}
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private:
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// data
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QLinkedList<NormalizedPoint> points;
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NormalizedRect totalRect;
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NormalizedPoint lastPoint;
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};
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/** @short PickPointEngine */
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class PickPointEngine : public AnnotatorEngine
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{
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public:
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PickPointEngine( const QDomElement & engineElement )
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: AnnotatorEngine( engineElement ), clicked( false )
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{
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// parse engine specific attributes
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QString pixmapName = engineElement.attribute( "hoverIcon" );
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if ( pixmapName.isNull() )
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pixmapName = "kpdf";
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// create engine objects
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pixmap = new QPixmap( DesktopIcon( "kpdf", 32 ) );
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}
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~PickPointEngine()
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{
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delete pixmap;
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}
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QRect event( EventType type, Button /*button*/, double nX, double nY, double xScale, double yScale )
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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 on click
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if ( type == Press && clicked == false )
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{
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clicked = true;
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}
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// repaint if moving while pressing
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else if ( type == Move && clicked == true )
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{
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}
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// operation finished on release
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else if ( type == Release && clicked == true )
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{
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m_creationCompleted = true;
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}
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else
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return QRect();
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// update variables and extents (zoom invariant rect)
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point.x = nX;
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point.y = nY;
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rect.left = nX - (16.0 / (double)xScale) ;
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rect.right = nX + (17.0 / (double)xScale) ;
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rect.top = nY - (16.0 / (double)yScale) ;
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rect.bottom = nY + (17.0 / (double)yScale) ;
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return rect.geometry( (int)xScale, (int)yScale );
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}
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void paint( QPainter * painter, double xScale, double yScale, const QRect & /*clipRect*/ )
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{
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if ( clicked && pixmap )
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{
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int pX = (int)(point.x * (double)xScale);
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int pY = (int)(point.y * (double)yScale);
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painter->drawPixmap( pX - 15, pY - 15, *pixmap );
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}
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}
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Annotation * end()
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{ return 0; }
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private:
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bool clicked;
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NormalizedRect rect;
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NormalizedPoint point;
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QPixmap * pixmap;
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};
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/** @short TwoPointsEngine */
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class TwoPointsEngine : public AnnotatorEngine
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{
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public:
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TwoPointsEngine( 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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m_block = engineElement.attribute( "block" ) == "true";
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}
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QRect event( EventType type, Button button, double nX, double nY, double xScale, double yScale )
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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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NormalizedPoint newPoint;
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newPoint.x = nX;
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newPoint.y = nY;
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rect.left = rect.right =newPoint.x;
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rect.top = rect.bottom =newPoint.y;
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points.append( newPoint );
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return QRect();
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}
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// move the second point
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else if ( type == Move && !points.isEmpty() )
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{
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if ( points.count() == 2 )
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points.pop_back();
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NormalizedPoint newPoint;
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newPoint.x = nX;
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newPoint.y = nY;
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points.append( newPoint );
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NormalizedPoint firstPoint = points.front();
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rect.left = qMin( firstPoint.x, nX ) - 2.0 / (double)xScale;
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rect.right = qMax( firstPoint.x, nX ) + 2.0 / (double)xScale;
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rect.top = qMin( firstPoint.y, nY ) - 2.0 / (double)yScale;
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rect.bottom = qMax( firstPoint.y, nY ) + 2.0 / (double)yScale;
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}
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// end creation if we have 2 points
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else if ( type == Release && points.count() == 2 )
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m_creationCompleted = true;
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return rect.geometry( (int)xScale, (int)yScale );
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}
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void paint( QPainter * painter, double xScale, double yScale, const QRect & /*clipRect*/ )
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{
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if ( points.count() != 2 )
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return;
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NormalizedPoint first = points[0];
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NormalizedPoint second = points[1];
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if ( m_block )
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{
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// draw a semitransparent block around the 2 points
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painter->setPen( m_engineColor );
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painter->setBrush( QBrush( m_engineColor.light(), Qt::Dense4Pattern ) );
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painter->drawRect( (int)(first.x * (double)xScale), (int)(first.y * (double)yScale),
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(int)((second.x - first.x) * (double)xScale), (int)((second.y - first.y) * (double)yScale) );
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}
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else
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{
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// draw a line that connects the 2 points
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painter->setPen( QPen( m_engineColor, 2 ) );
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painter->drawLine( (int)(first.x * (double)xScale), (int)(first.y * (double)yScale),
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(int)(second.x * (double)xScale), (int)(second.y * (double)yScale) );
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}
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}
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Annotation * end()
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{
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return 0;
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}
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private:
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QList<NormalizedPoint> points;
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NormalizedRect rect;
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bool m_block;
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};
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/** PageViewAnnotator **/
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PageViewAnnotator::PageViewAnnotator( PageView * parent, KPDFDocument * storage )
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: QObject( parent ), m_document( storage ), m_pageView( parent ),
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m_toolBar( 0 ), m_engine( 0 ), m_lastToolID( -1 ), m_lockedItem( 0 )
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{
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// load the tools from the 'xml tools definition' file. store the tree internally.
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QFile infoFile( locate("data", "oKular/tools.xml") );
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if ( infoFile.exists() && infoFile.open( IO_ReadOnly ) )
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{
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QDomDocument doc( "annotatingTools" );
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if ( doc.setContent( &infoFile ) )
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m_toolsDefinition = doc.elementsByTagName("annotatingTools").item( 0 ).toElement();
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else
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kWarning() << "AnnotatingTools XML file seems to be damaged" << endl;
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infoFile.close();
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}
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else
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kWarning() << "Unable to open AnnotatingTools XML definition" << endl;
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}
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PageViewAnnotator::~PageViewAnnotator()
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{
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delete m_engine;
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}
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void PageViewAnnotator::setEnabled( bool on )
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{
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if ( !on )
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{
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// remove toolBar
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if ( m_toolBar )
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m_toolBar->hideAndDestroy();
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m_toolBar = 0;
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return;
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}
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// if no tools are defined, don't show the toolbar
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if ( !m_toolsDefinition.hasChildNodes() )
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return;
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// create toolBar
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if ( !m_toolBar )
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{
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m_toolBar = new PageViewToolBar( m_pageView, m_pageView->viewport() );
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connect( m_toolBar, SIGNAL( toolSelected(int) ),
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this, SLOT( slotToolSelected(int) ) );
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connect( m_toolBar, SIGNAL( orientationChanged(int) ),
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this, SLOT( slotSaveToolbarOrientation(int) ) );
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}
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// create the ToolBarItems from the XML dom tree
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QLinkedList<ToolBarItem> items;
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QDomNode toolDescription = m_toolsDefinition.firstChild();
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while ( toolDescription.isElement() )
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{
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QDomElement toolElement = toolDescription.toElement();
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if ( toolElement.tagName() == "tool" )
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{
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ToolBarItem item;
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item.id = toolElement.attribute("id").toInt();
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item.text = toolElement.attribute("name");
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item.pixmap = toolElement.attribute("pixmap");
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QDomNode shortcutNode = toolElement.elementsByTagName( "shortcut" ).item( 0 );
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if ( shortcutNode.isElement() )
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item.shortcut = shortcutNode.toElement().text();
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items.push_back( item );
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}
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toolDescription = toolDescription.nextSibling();
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}
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// show the toolBar
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m_toolBar->showItems( (PageViewToolBar::Side)KpdfSettings::editToolBarPlacement(), items );
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// ask for Author's name if not already set
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if ( KpdfSettings::annotationsAuthor().isEmpty() )
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{
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// get default username from the kdelibs/kdecore/KUser
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KUser currentUser;
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QString userName = currentUser.fullName();
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// ask the user for confirmation/change
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bool firstTry = true;
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while ( firstTry || userName.isEmpty() )
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{
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QString prompt = firstTry ? i18n( "Please insert your name or initials:" ) :
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i18n( "You must set this name:" );
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userName = KInputDialog::getText( i18n("Annotations author"), prompt, userName );
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firstTry = false;
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}
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// save the name
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KpdfSettings::setAnnotationsAuthor( userName );
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}
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}
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bool PageViewAnnotator::routeEvents() const
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{
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return m_engine && m_toolBar;
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}
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void PageViewAnnotator::routeEvent( QMouseEvent * e, PageViewItem * item )
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{
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if ( !item ) return; //STRAPAAAATCH !!! FIXME
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// find out mouse event type
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AnnotatorEngine::EventType eventType = AnnotatorEngine::Press;
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if ( e->type() == QEvent::MouseMove )
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eventType = AnnotatorEngine::Move;
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else if ( e->type() == QEvent::MouseButtonRelease )
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eventType = AnnotatorEngine::Release;
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// find out the pressed button
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AnnotatorEngine::Button button = AnnotatorEngine::None;
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Qt::ButtonState buttonState = ( eventType == AnnotatorEngine::Move ) ? e->state() : e->button();
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if ( buttonState == Qt::LeftButton )
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button = AnnotatorEngine::Left;
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else if ( buttonState == Qt::RightButton )
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button = AnnotatorEngine::Right;
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// find out normalized mouse coords inside current item
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const QRect & itemRect = item->geometry();
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double itemWidth = (double)itemRect.width();
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double itemHeight = (double)itemRect.height();
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double nX = (double)(e->x() - itemRect.left()) / itemWidth;
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double nY = (double)(e->y() - itemRect.top()) / itemHeight;
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// 1. lock engine to current item
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if ( m_lockedItem && item != m_lockedItem )
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return;
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if ( !m_lockedItem && eventType == AnnotatorEngine::Press )
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m_lockedItem = item;
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// 2. use engine to perform operations
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QRect paintRect = m_engine->event( eventType, button, nX, nY, itemWidth, itemHeight );
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// 3. update absolute extents rect and send paint event(s)
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if ( paintRect.isValid() )
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{
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// 3.1. unite old and new painting regions
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QRegion compoundRegion( m_lastDrawnRect );
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m_lastDrawnRect = paintRect;
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m_lastDrawnRect.translate( itemRect.left(), itemRect.top() );
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// 3.2. decompose paint region in rects and send paint events
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QVector<QRect> rects = compoundRegion.unite( m_lastDrawnRect ).rects();
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for ( int i = 0; i < rects.count(); i++ )
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m_pageView->updateContents( rects[i] );
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}
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|
|
|
// 4. if engine has finished, apply Annotation to the page
|
|
if ( m_engine->creationCompleted() )
|
|
{
|
|
// apply engine data to Annotation and reset engine
|
|
Annotation * annotation = m_engine->end();
|
|
// attach the newly filled annotation to the page
|
|
if ( annotation )
|
|
m_document->addPageAnnotation( m_lockedItem->pageNumber(), annotation );
|
|
|
|
// go on creating annotations of the same type
|
|
slotToolSelected( m_lastToolID );
|
|
}
|
|
}
|
|
|
|
bool PageViewAnnotator::routePaints( const QRect & wantedRect ) const
|
|
{
|
|
return m_engine && m_toolBar && wantedRect.intersects( m_lastDrawnRect );
|
|
}
|
|
|
|
void PageViewAnnotator::routePaint( QPainter * painter, const QRect & paintRect )
|
|
{
|
|
#ifndef NDEBUG
|
|
// [DEBUG] draw the paint region if enabled
|
|
if ( KpdfSettings::debugDrawAnnotationRect() )
|
|
painter->drawRect( paintRect );
|
|
#endif
|
|
// move painter to current itemGeometry rect
|
|
const QRect & itemGeometry = m_lockedItem->geometry();
|
|
painter->save();
|
|
painter->translate( itemGeometry.left(), itemGeometry.top() );
|
|
|
|
// transform cliprect from absolute to item relative coords
|
|
QRect annotRect = paintRect.intersect( m_lastDrawnRect );
|
|
annotRect.translate( itemGeometry.left(), itemGeometry.top() );
|
|
|
|
// use current engine for painting
|
|
m_engine->paint( painter, m_lockedItem->width(), m_lockedItem->height(), annotRect );
|
|
painter->restore();
|
|
}
|
|
|
|
void PageViewAnnotator::slotToolSelected( int toolID )
|
|
{
|
|
// terminate any previous operation
|
|
if ( m_engine )
|
|
{
|
|
delete m_engine;
|
|
m_engine = 0;
|
|
}
|
|
m_lockedItem = 0;
|
|
if ( m_lastDrawnRect.isValid() )
|
|
{
|
|
m_pageView->updateContents( m_lastDrawnRect );
|
|
m_lastDrawnRect = QRect();
|
|
}
|
|
|
|
// store current tool for later usage
|
|
m_lastToolID = toolID;
|
|
|
|
// handle tool deselection
|
|
if ( toolID == -1 )
|
|
{
|
|
m_pageView->displayMessage( QString() );
|
|
return;
|
|
}
|
|
|
|
// for the selected tool create the Engine
|
|
QDomNode toolNode = m_toolsDefinition.firstChild();
|
|
while ( toolNode.isElement() )
|
|
{
|
|
QDomElement toolElement = toolNode.toElement();
|
|
toolNode = toolNode.nextSibling();
|
|
|
|
// only find out the element describing selected tool
|
|
if ( toolElement.tagName() != "tool" || toolElement.attribute("id").toInt() != toolID )
|
|
continue;
|
|
|
|
// parse tool properties
|
|
QDomNode toolSubNode = toolElement.firstChild();
|
|
while ( toolSubNode.isElement() )
|
|
{
|
|
QDomElement toolSubElement = toolSubNode.toElement();
|
|
toolSubNode = toolSubNode.nextSibling();
|
|
|
|
// create the AnnotatorEngine
|
|
if ( toolSubElement.tagName() == "engine" )
|
|
{
|
|
QString type = toolSubElement.attribute( "type" );
|
|
if ( type == "SmoothLine" )
|
|
m_engine = new SmoothPathEngine( toolSubElement );
|
|
else if ( type == "PickPoint" )
|
|
m_engine = new PickPointEngine( toolSubElement );
|
|
else if ( type == "TwoPoints" )
|
|
m_engine = new TwoPointsEngine( toolSubElement );
|
|
else
|
|
kWarning() << "tools.xml: engine type:'" << type << "' is not defined!" << endl;
|
|
}
|
|
// display the tooltip
|
|
else if ( toolSubElement.tagName() == "tooltip" )
|
|
m_pageView->displayMessage( toolSubElement.text() );
|
|
}
|
|
|
|
// consistancy warning
|
|
if ( !m_engine )
|
|
kWarning() << "tools.xml: couldn't find good engine description. check xml." << endl;
|
|
|
|
// stop after parsing selected tool's node
|
|
break;
|
|
}
|
|
}
|
|
|
|
void PageViewAnnotator::slotSaveToolbarOrientation( int side )
|
|
{
|
|
KpdfSettings::setEditToolBarPlacement( (int)side );
|
|
}
|
|
|
|
#include "pageviewannotator.moc"
|