okular/core/area.cpp

494 lines
14 KiB
C++
Raw Normal View History

/***************************************************************************
* Copyright (C) 2004-05 by Enrico Ros <eros.kde@email.it> *
* Copyright (C) 2005 by Piotr Szymanski <niedakh@gmail.com> *
* 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. *
***************************************************************************/
#include "area.h"
#include <QtCore/QRect>
#include <QtGui/QPolygonF>
#include <kdebug.h>
#include <math.h>
#include "action.h"
#include "annotations.h"
#include "annotations_p.h"
#include "debug_p.h"
#include "sourcereference.h"
using namespace Okular;
/** class NormalizedPoint **/
NormalizedPoint::NormalizedPoint()
: x( 0.0 ), y( 0.0 ) {}
NormalizedPoint::NormalizedPoint( double dX, double dY )
: x( dX ), y( dY ) {}
NormalizedPoint::NormalizedPoint( int iX, int iY, int xScale, int yScale )
: x( (double)iX / (double)xScale ), y( (double)iY / (double)yScale ) {}
NormalizedPoint& NormalizedPoint::operator=( const NormalizedPoint & p )
{
x = p.x;
y = p.y;
return *this;
}
void NormalizedPoint::transform( const QTransform &matrix )
{
qreal tmp_x = (qreal)x;
qreal tmp_y = (qreal)y;
matrix.map( tmp_x, tmp_y, &tmp_x, &tmp_y );
x = tmp_x;
y = tmp_y;
}
double NormalizedPoint::distanceSqr( double x, double y, double xScale, double yScale ) const
{
return pow( (this->x - x) * xScale, 2 ) + pow( (this->y - y) * yScale, 2 );
}
/**
* Returns a vector from the given points @p a and @p b
* @internal
*/
NormalizedPoint operator-( const NormalizedPoint& a, const NormalizedPoint& b )
{
return NormalizedPoint( a.x - b.x, a.y - b.y );
}
/**
* @brief Calculates distance of the point @p x @p y @p xScale @p yScale to the line segment from @p start to @p end
*/
double NormalizedPoint::distanceSqr( double x, double y, double xScale, double yScale, const NormalizedPoint& start, const NormalizedPoint& end )
{
NormalizedPoint point( x, y );
double thisDistance;
NormalizedPoint lineSegment( end - start );
const double lengthSqr = pow( lineSegment.x, 2 ) + pow( lineSegment.y, 2 );
//if the length of the current segment is null, we can just
//measure the distance to either end point
if ( lengthSqr == 0.0 )
{
thisDistance = end.distanceSqr( x, y, xScale, yScale );
}
else
{
//vector from the start point of the current line segment to the measurement point
NormalizedPoint a = point - start;
//vector from the same start point to the end point of the current line segment
NormalizedPoint b = end - start;
//we're using a * b (dot product) := |a| * |b| * cos(phi) and the knowledge
//that cos(phi) is adjacent side / hypotenuse (hypotenuse = |b|)
//therefore, t becomes the length of the vector that represents the projection of
//the point p onto the current line segment
//(hint: if this is still unclear, draw it!)
float t = (a.x * b.x + a.y * b.y) / lengthSqr;
if ( t < 0 )
{
//projection falls outside the line segment on the side of "start"
thisDistance = point.distanceSqr( start.x, start.y, xScale, yScale );
}
else if ( t > 1 )
{
//projection falls outside the line segment on the side of the current point
thisDistance = point.distanceSqr( end.x, end.y, xScale, yScale );
}
else
{
//projection is within [start, *i];
//determine the length of the perpendicular distance from the projection to the actual point
NormalizedPoint direction = end - start;
NormalizedPoint projection = start - NormalizedPoint( -t * direction.x, -t * direction.y );
thisDistance = projection.distanceSqr( x, y, xScale, yScale );
}
}
return thisDistance;
}
QDebug operator<<( QDebug str, const Okular::NormalizedPoint& p )
{
str.nospace() << "NormPt(" << p.x << "," << p.y << ")";
return str.space();
}
/** class NormalizedRect **/
NormalizedRect::NormalizedRect()
: left( 0.0 ), top( 0.0 ), right( 0.0 ), bottom( 0.0 ) {}
NormalizedRect::NormalizedRect( double l, double t, double r, double b )
// note: check for swapping coords?
: left( l ), top( t ), right( r ), bottom( b ) {}
NormalizedRect::NormalizedRect( const QRect & r, double xScale, double yScale )
: left( (double)r.left() / xScale ), top( (double)r.top() / yScale ),
right( (double)r.right() / xScale ), bottom( (double)r.bottom() / yScale ) {}
NormalizedRect::NormalizedRect( const NormalizedRect & rect )
: left( rect.left ), top( rect.top ), right( rect.right ), bottom( rect.bottom ) {}
NormalizedRect NormalizedRect::fromQRectF( const QRectF &rect )
{
QRectF nrect = rect.normalized();
NormalizedRect ret;
ret.left = nrect.left();
ret.top = nrect.top();
ret.right = nrect.right();
ret.bottom = nrect.bottom();
return ret;
}
bool NormalizedRect::isNull() const
{
return left == 0 && top== 0 && right == 0 && bottom == 0;
}
bool NormalizedRect::contains( double x, double y ) const
{
return x >= left && x <= right && y >= top && y <= bottom;
}
bool NormalizedRect::intersects( const NormalizedRect & r ) const
{
return (r.left <= right) && (r.right >= left) && (r.top <= bottom) && (r.bottom >= top);
}
bool NormalizedRect::intersects( const NormalizedRect * r ) const
{
return (r->left <= right) && (r->right >= left) && (r->top <= bottom) && (r->bottom >= top);
}
bool NormalizedRect::intersects( double l, double t, double r, double b ) const
{
return (l <= right) && (r >= left) && (t <= bottom) && (b >= top);
}
NormalizedRect NormalizedRect::operator| (const NormalizedRect & r) const
{
NormalizedRect ret;
// todo !
ret.left=qMin(left,r.left);
ret.top=qMin(top,r.top);
ret.bottom=qMax(bottom,r.bottom);
ret.right=qMax(right,r.right);
return ret;
}
NormalizedRect& NormalizedRect::operator|= (const NormalizedRect & r)
{
left = qMin( left, r.left );
top = qMin( top, r.top );
bottom = qMax( bottom, r.bottom );
right = qMax( right, r.right );
return *this;
}
NormalizedRect NormalizedRect::operator&( const NormalizedRect & r ) const
{
if ( isNull() || r.isNull() )
return NormalizedRect();
NormalizedRect ret;
ret.left = qMax( left, r.left );
ret.top = qMax( top, r.top );
ret.bottom = qMin( bottom, r.bottom );
ret.right = qMin( right, r.right );
return ret;
}
NormalizedRect & NormalizedRect::operator=( const NormalizedRect & r )
{
left = r.left;
right = r.right;
top = r.top;
bottom = r.bottom;
return *this;
}
bool NormalizedRect::operator==( const NormalizedRect & r ) const
{
return ( isNull() && r.isNull() ) ||
( fabs( left - r.left ) < 1e-4 &&
fabs( right - r.right ) < 1e-4 &&
fabs( top - r.top ) < 1e-4 &&
fabs( bottom - r.bottom ) < 1e-4 );
}
NormalizedPoint NormalizedRect::center() const
{
return NormalizedPoint((left+right)/2.0, (top+bottom)/2.0);
}
/*
QDebug operator << (QDebug str , const NormalizedRect &r)
{
str << "[" <<r.left() << "," << r.top() << "] x "<< "[" <<r.right() << "," << r.bottom() << "]";
return str;
}*/
QRect NormalizedRect::geometry( int xScale, int yScale ) const
{
int l = (int)( left * xScale ),
t = (int)( top * yScale ),
r = (int)( right * xScale ),
b = (int)( bottom * yScale );
return QRect( l, t, r - l + 1, b - t + 1 );
}
QRect NormalizedRect::roundedGeometry( int xScale, int yScale ) const
{
int l = (int)( left * xScale + 0.5 ),
t = (int)( top * yScale + 0.5 ),
r = (int)( right * xScale + 0.5 ),
b = (int)( bottom * yScale + 0.5 );
return QRect( l, t, r - l + 1, b - t + 1 );
}
void NormalizedRect::transform( const QTransform &matrix )
{
QRectF rect( left, top, right - left, bottom - top );
rect = matrix.mapRect( rect );
left = rect.left();
top = rect.top();
right = rect.right();
bottom = rect.bottom();
}
QDebug operator<<( QDebug str, const Okular::NormalizedRect& r )
{
str.nospace() << "NormRect(" << r.left << "," << r.top << " x " << ( r.right - r.left ) << "+" << ( r.bottom - r.top ) << ")";
return str.space();
}
RegularAreaRect::RegularAreaRect()
: RegularArea< NormalizedRect, QRect >(), d( 0 )
{
}
RegularAreaRect::RegularAreaRect( const RegularAreaRect& rar )
: RegularArea< NormalizedRect, QRect >( rar ), d( 0 )
{
}
RegularAreaRect::~RegularAreaRect()
{
}
RegularAreaRect& RegularAreaRect::operator=( const RegularAreaRect& rar )
{
RegularArea< NormalizedRect, QRect >::operator=( rar );
return *this;
}
HighlightAreaRect::HighlightAreaRect( const RegularAreaRect *area )
: RegularAreaRect(), s_id( -1 )
{
if ( area )
{
RegularAreaRect::ConstIterator it = area->begin();
RegularAreaRect::ConstIterator itEnd = area->end();
for ( ; it != itEnd; ++it )
{
append( NormalizedRect( *it ) );
}
}
}
/** class ObjectRect **/
ObjectRect::ObjectRect( double l, double t, double r, double b, bool ellipse, ObjectType type, void * pnt )
: m_objectType( type ), m_object( pnt )
{
// assign coordinates swapping them if negative width or height
QRectF rect( r > l ? l : r, b > t ? t : b, fabs( r - l ), fabs( b - t ) );
if ( ellipse )
m_path.addEllipse( rect );
else
m_path.addRect( rect );
m_transformedPath = m_path;
}
ObjectRect::ObjectRect( const NormalizedRect& x, bool ellipse, ObjectType type, void * pnt )
: m_objectType( type ), m_object( pnt )
{
QRectF rect( x.left, x.top, fabs( x.right - x.left ), fabs( x.bottom - x.top ) );
if ( ellipse )
m_path.addEllipse( rect );
else
m_path.addRect( rect );
m_transformedPath = m_path;
}
ObjectRect::ObjectRect( const QPolygonF &poly, ObjectType type, void * pnt )
: m_objectType( type ), m_object( pnt )
{
m_path.addPolygon( poly );
m_transformedPath = m_path;
}
ObjectRect::ObjectType ObjectRect::objectType() const
{
return m_objectType;
}
const void * ObjectRect::object() const
{
return m_object;
}
const QPainterPath &ObjectRect::region() const
{
return m_transformedPath;
}
QRect ObjectRect::boundingRect( double xScale, double yScale ) const
{
const QRectF &br = m_transformedPath.boundingRect();
return QRect( (int)( br.left() * xScale ), (int)( br.top() * yScale ),
(int)( br.width() * xScale ), (int)( br.height() * yScale ) );
}
bool ObjectRect::contains( double x, double y, double, double ) const
{
return m_transformedPath.contains( QPointF( x, y ) );
}
void ObjectRect::transform( const QTransform &matrix )
{
m_transformedPath = matrix.map( m_path );
}
double ObjectRect::distanceSqr( double x, double y, double xScale, double yScale ) const
{
switch ( m_objectType )
{
case Action:
case Image:
{
const QRectF& rect( m_transformedPath.boundingRect() );
return NormalizedRect( rect.x(), rect.y(), rect.right(), rect.bottom() ).distanceSqr( x, y, xScale, yScale );
}
case OAnnotation:
{
return static_cast<Annotation*>(m_object)->d_func()->distanceSqr( x, y, xScale, yScale );
}
case SourceRef:
{
const SourceRefObjectRect * sr = static_cast< const SourceRefObjectRect * >( this );
const NormalizedPoint& point = sr->m_point;
if ( point.x == -1.0 )
{
return pow( ( y - point.y ) * yScale, 2 );
}
else if ( point.y == -1.0 )
{
return pow( ( x - point.x ) * xScale, 2 );
}
else
{
return pow( ( x - point.x ) * xScale, 2 ) + pow( ( y - point.y ) * yScale, 2 );
}
}
}
return 0.0;
}
ObjectRect::~ObjectRect()
{
if ( !m_object )
return;
if ( m_objectType == Action )
delete static_cast<Okular::Action*>( m_object );
else if ( m_objectType == SourceRef )
delete static_cast<Okular::SourceReference*>( m_object );
else
2014-09-11 17:36:01 +00:00
qCDebug(OkularCoreDebug).nospace() << "Object deletion not implemented for type '" << m_objectType << "'.";
}
/** class AnnotationObjectRect **/
AnnotationObjectRect::AnnotationObjectRect( Annotation * annotation )
: ObjectRect( QPolygonF(), OAnnotation, annotation ), m_annotation( annotation )
{
}
Annotation *AnnotationObjectRect::annotation() const
{
return m_annotation;
}
QRect AnnotationObjectRect::boundingRect( double xScale, double yScale ) const
{
const QRect annotRect = AnnotationUtils::annotationGeometry( m_annotation, xScale, yScale );
const QPoint center = annotRect.center();
// Make sure that the rectangle has a minimum size, so that it's possible
// to click on it
const int minSize = 14;
const QRect minRect( center.x()-minSize/2, center.y()-minSize/2, minSize, minSize );
return annotRect | minRect;
}
bool AnnotationObjectRect::contains( double x, double y, double xScale, double yScale ) const
{
return boundingRect( xScale, yScale ).contains( (int)( x * xScale ), (int)( y * yScale ), false );
}
AnnotationObjectRect::~AnnotationObjectRect()
{
// the annotation pointer is kept elsewehere (in Page, most probably),
// so just release its pointer
m_object = 0;
}
void AnnotationObjectRect::transform( const QTransform &matrix )
{
m_annotation->d_func()->annotationTransform( matrix );
}
/** class SourceRefObjectRect **/
SourceRefObjectRect::SourceRefObjectRect( const NormalizedPoint& point, void * srcRef )
: ObjectRect( point.x, point.y, .0, .0, false, SourceRef, srcRef ), m_point( point )
{
const double x = m_point.x < 0.0 ? 0.5 : m_point.x;
const double y = m_point.y < 0.0 ? 0.5 : m_point.y;
const QRectF rect( x - 2, y - 2, 5, 5 );
m_path.addRect( rect );
m_transformedPath = m_path;
}
QRect SourceRefObjectRect::boundingRect( double xScale, double yScale ) const
{
const double x = m_point.x < 0.0 ? 0.5 : m_point.x;
const double y = m_point.y < 0.0 ? 0.5 : m_point.y;
return QRect( x * xScale, y * yScale, 1, 1 );
}
bool SourceRefObjectRect::contains( double x, double y, double xScale, double yScale ) const
{
return distanceSqr( x, y, xScale, yScale ) < ( pow( 7.0 / xScale, 2 ) + pow( 7.0 / yScale, 2 ) );
}