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qgscomposermapgrid.cpp
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qgscomposermapgrid.cpp
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/***************************************************************************
qgscomposermapgrid.cpp
----------------------
begin : December 2013
copyright : (C) 2013 by Marco Hugentobler
email : marco dot hugentobler at sourcepole dot ch
***************************************************************************/
/***************************************************************************
* *
* 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 "qgscomposermapgrid.h"
#include "qgscomposerutils.h"
#include "qgsclipper.h"
#include "qgsgeometry.h"
#include "qgscomposermap.h"
#include "qgscomposition.h"
#include "qgsmaprenderer.h"
#include "qgsrendercontext.h"
#include "qgssymbollayerv2utils.h"
#include "qgssymbolv2.h"
#include "qgscoordinatereferencesystem.h"
#include "qgslogger.h"
#include "qgsfontutils.h"
#include "qgsexpressioncontext.h"
#include <QPainter>
#include <QPen>
#define MAX_GRID_LINES 1000 //maximum number of horizontal or vertical grid lines to draw
QgsComposerMapGridStack::QgsComposerMapGridStack( QgsComposerMap* map )
: QgsComposerMapItemStack( map )
{
}
QgsComposerMapGridStack::~QgsComposerMapGridStack()
{
}
void QgsComposerMapGridStack::addGrid( QgsComposerMapGrid* grid )
{
QgsComposerMapItemStack::addItem( grid );
}
void QgsComposerMapGridStack::removeGrid( const QString& gridId )
{
QgsComposerMapItemStack::removeItem( gridId );
}
void QgsComposerMapGridStack::moveGridUp( const QString& gridId )
{
QgsComposerMapItemStack::moveItemUp( gridId );
}
void QgsComposerMapGridStack::moveGridDown( const QString& gridId )
{
QgsComposerMapItemStack::moveItemDown( gridId );
}
const QgsComposerMapGrid* QgsComposerMapGridStack::constGrid( const QString& gridId ) const
{
const QgsComposerMapItem* item = QgsComposerMapItemStack::constItem( gridId );
return dynamic_cast<const QgsComposerMapGrid*>( item );
}
QgsComposerMapGrid* QgsComposerMapGridStack::grid( const QString& gridId ) const
{
QgsComposerMapItem* item = QgsComposerMapItemStack::item( gridId );
return dynamic_cast<QgsComposerMapGrid*>( item );
}
QgsComposerMapGrid *QgsComposerMapGridStack::grid( const int index ) const
{
QgsComposerMapItem* item = QgsComposerMapItemStack::item( index );
return dynamic_cast<QgsComposerMapGrid*>( item );
}
QList<QgsComposerMapGrid *> QgsComposerMapGridStack::asList() const
{
QList< QgsComposerMapGrid* > list;
QList< QgsComposerMapItem* >::const_iterator it = mItems.begin();
for ( ; it != mItems.end(); ++it )
{
QgsComposerMapGrid* grid = dynamic_cast<QgsComposerMapGrid*>( *it );
if ( grid )
{
list.append( grid );
}
}
return list;
}
QgsComposerMapGrid &QgsComposerMapGridStack::operator[]( int idx )
{
QgsComposerMapItem* item = mItems[idx];
QgsComposerMapGrid* grid = dynamic_cast<QgsComposerMapGrid*>( item );
return *grid;
}
bool QgsComposerMapGridStack::readXML( const QDomElement &elem, const QDomDocument &doc )
{
removeItems();
//read grid stack
QDomNodeList mapGridNodeList = elem.elementsByTagName( "ComposerMapGrid" );
for ( int i = 0; i < mapGridNodeList.size(); ++i )
{
QDomElement mapGridElem = mapGridNodeList.at( i ).toElement();
QgsComposerMapGrid* mapGrid = new QgsComposerMapGrid( mapGridElem.attribute( "name" ), mComposerMap );
mapGrid->readXML( mapGridElem, doc );
mItems.append( mapGrid );
}
return true;
}
double QgsComposerMapGridStack::maxGridExtension() const
{
double maxGridExtension = 0;
QList< QgsComposerMapItem* >::const_iterator it = mItems.constBegin();
for ( ; it != mItems.constEnd(); ++it )
{
QgsComposerMapGrid* grid = dynamic_cast<QgsComposerMapGrid*>( *it );
if ( grid )
{
maxGridExtension = qMax( maxGridExtension, grid->maxExtension() );
}
}
return maxGridExtension;
}
//
// QgsComposerMapGrid
//
QgsComposerMapGrid::QgsComposerMapGrid( const QString& name, QgsComposerMap* map )
: QgsComposerMapItem( name, map )
{
init();
}
QgsComposerMapGrid::QgsComposerMapGrid()
: QgsComposerMapItem( QString(), 0 )
{
init();
}
void QgsComposerMapGrid::init()
{
mTransformDirty = true;
mGridStyle = QgsComposerMapGrid::Solid;
mGridIntervalX = 0.0;
mGridIntervalY = 0.0;
mGridOffsetX = 0.0;
mGridOffsetY = 0.0;
mGridAnnotationFontColor = Qt::black;
mGridAnnotationPrecision = 3;
mShowGridAnnotation = false;
mLeftGridAnnotationDisplay = QgsComposerMapGrid::ShowAll;
mRightGridAnnotationDisplay = QgsComposerMapGrid::ShowAll;
mTopGridAnnotationDisplay = QgsComposerMapGrid::ShowAll;
mBottomGridAnnotationDisplay = QgsComposerMapGrid::ShowAll;
mLeftGridAnnotationPosition = QgsComposerMapGrid::OutsideMapFrame;
mRightGridAnnotationPosition = QgsComposerMapGrid::OutsideMapFrame;
mTopGridAnnotationPosition = QgsComposerMapGrid::OutsideMapFrame;
mBottomGridAnnotationPosition = QgsComposerMapGrid::OutsideMapFrame;
mAnnotationFrameDistance = 1.0;
mLeftGridAnnotationDirection = QgsComposerMapGrid::Horizontal;
mRightGridAnnotationDirection = QgsComposerMapGrid::Horizontal;
mTopGridAnnotationDirection = QgsComposerMapGrid::Horizontal;
mBottomGridAnnotationDirection = QgsComposerMapGrid::Horizontal;
mGridAnnotationFormat = QgsComposerMapGrid::Decimal;
mGridFrameStyle = QgsComposerMapGrid::NoFrame;
mGridFrameSides = QgsComposerMapGrid::FrameLeft | QgsComposerMapGrid::FrameRight |
QgsComposerMapGrid::FrameTop | QgsComposerMapGrid::FrameBottom;
mGridFrameWidth = 2.0;
mGridFramePenThickness = 0.3;
mGridFramePenColor = QColor( 0, 0, 0 );
mGridFrameFillColor1 = Qt::white;
mGridFrameFillColor2 = Qt::black;
mCrossLength = 3;
mLeftFrameDivisions = QgsComposerMapGrid::ShowAll;
mRightFrameDivisions = QgsComposerMapGrid::ShowAll;
mTopFrameDivisions = QgsComposerMapGrid::ShowAll;
mBottomFrameDivisions = QgsComposerMapGrid::ShowAll;
mGridLineSymbol = 0;
mGridMarkerSymbol = 0;
mGridUnit = MapUnit;
mBlendMode = QPainter::CompositionMode_SourceOver;
//get default composer font from settings
QSettings settings;
QString defaultFontString = settings.value( "/Composer/defaultFont" ).toString();
if ( !defaultFontString.isEmpty() )
{
mGridAnnotationFont.setFamily( defaultFontString );
}
createDefaultGridLineSymbol();
createDefaultGridMarkerSymbol();
}
QgsComposerMapGrid::~QgsComposerMapGrid()
{
delete mGridLineSymbol;
delete mGridMarkerSymbol;
}
void QgsComposerMapGrid::createDefaultGridLineSymbol()
{
delete mGridLineSymbol;
QgsStringMap properties;
properties.insert( "color", "0,0,0,255" );
properties.insert( "width", "0.3" );
properties.insert( "capstyle", "flat" );
mGridLineSymbol = QgsLineSymbolV2::createSimple( properties );
}
void QgsComposerMapGrid::createDefaultGridMarkerSymbol()
{
delete mGridMarkerSymbol;
QgsStringMap properties;
properties.insert( "name", "circle" );
properties.insert( "size", "2.0" );
properties.insert( "color", "0,0,0,255" );
mGridMarkerSymbol = QgsMarkerSymbolV2::createSimple( properties );
}
void QgsComposerMapGrid::setGridLineWidth( const double width )
{
if ( mGridLineSymbol )
{
mGridLineSymbol->setWidth( width );
}
}
void QgsComposerMapGrid::setGridLineColor( const QColor& c )
{
if ( mGridLineSymbol )
{
mGridLineSymbol->setColor( c );
}
}
bool QgsComposerMapGrid::writeXML( QDomElement& elem, QDomDocument& doc ) const
{
if ( elem.isNull() )
{
return false;
}
QDomElement mapGridElem = doc.createElement( "ComposerMapGrid" );
mapGridElem.setAttribute( "gridStyle", mGridStyle );
mapGridElem.setAttribute( "intervalX", qgsDoubleToString( mGridIntervalX ) );
mapGridElem.setAttribute( "intervalY", qgsDoubleToString( mGridIntervalY ) );
mapGridElem.setAttribute( "offsetX", qgsDoubleToString( mGridOffsetX ) );
mapGridElem.setAttribute( "offsetY", qgsDoubleToString( mGridOffsetY ) );
mapGridElem.setAttribute( "crossLength", qgsDoubleToString( mCrossLength ) );
QDomElement lineStyleElem = doc.createElement( "lineStyle" );
QDomElement gridLineStyleElem = QgsSymbolLayerV2Utils::saveSymbol( QString(), mGridLineSymbol, doc );
lineStyleElem.appendChild( gridLineStyleElem );
mapGridElem.appendChild( lineStyleElem );
QDomElement markerStyleElem = doc.createElement( "markerStyle" );
QDomElement gridMarkerStyleElem = QgsSymbolLayerV2Utils::saveSymbol( QString(), mGridMarkerSymbol, doc );
markerStyleElem.appendChild( gridMarkerStyleElem );
mapGridElem.appendChild( markerStyleElem );
mapGridElem.setAttribute( "gridFrameStyle", mGridFrameStyle );
mapGridElem.setAttribute( "gridFrameSideFlags", mGridFrameSides );
mapGridElem.setAttribute( "gridFrameWidth", qgsDoubleToString( mGridFrameWidth ) );
mapGridElem.setAttribute( "gridFramePenThickness", qgsDoubleToString( mGridFramePenThickness ) );
mapGridElem.setAttribute( "gridFramePenColor", QgsSymbolLayerV2Utils::encodeColor( mGridFramePenColor ) );
mapGridElem.setAttribute( "frameFillColor1", QgsSymbolLayerV2Utils::encodeColor( mGridFrameFillColor1 ) );
mapGridElem.setAttribute( "frameFillColor2", QgsSymbolLayerV2Utils::encodeColor( mGridFrameFillColor2 ) );
mapGridElem.setAttribute( "leftFrameDivisions", mLeftFrameDivisions );
mapGridElem.setAttribute( "rightFrameDivisions", mRightFrameDivisions );
mapGridElem.setAttribute( "topFrameDivisions", mTopFrameDivisions );
mapGridElem.setAttribute( "bottomFrameDivisions", mBottomFrameDivisions );
if ( mCRS.isValid() )
{
mCRS.writeXML( mapGridElem, doc );
}
mapGridElem.setAttribute( "annotationFormat", mGridAnnotationFormat );
mapGridElem.setAttribute( "showAnnotation", mShowGridAnnotation );
mapGridElem.setAttribute( "annotationExpression", mGridAnnotationExpressionString );
mapGridElem.setAttribute( "leftAnnotationDisplay", mLeftGridAnnotationDisplay );
mapGridElem.setAttribute( "rightAnnotationDisplay", mRightGridAnnotationDisplay );
mapGridElem.setAttribute( "topAnnotationDisplay", mTopGridAnnotationDisplay );
mapGridElem.setAttribute( "bottomAnnotationDisplay", mBottomGridAnnotationDisplay );
mapGridElem.setAttribute( "leftAnnotationPosition", mLeftGridAnnotationPosition );
mapGridElem.setAttribute( "rightAnnotationPosition", mRightGridAnnotationPosition );
mapGridElem.setAttribute( "topAnnotationPosition", mTopGridAnnotationPosition );
mapGridElem.setAttribute( "bottomAnnotationPosition", mBottomGridAnnotationPosition );
mapGridElem.setAttribute( "leftAnnotationDirection", mLeftGridAnnotationDirection );
mapGridElem.setAttribute( "rightAnnotationDirection", mRightGridAnnotationDirection );
mapGridElem.setAttribute( "topAnnotationDirection", mTopGridAnnotationDirection );
mapGridElem.setAttribute( "bottomAnnotationDirection", mBottomGridAnnotationDirection );
mapGridElem.setAttribute( "frameAnnotationDistance", QString::number( mAnnotationFrameDistance ) );
mapGridElem.appendChild( QgsFontUtils::toXmlElement( mGridAnnotationFont, doc, "annotationFontProperties" ) );
mapGridElem.setAttribute( "annotationFontColor", QgsSymbolLayerV2Utils::encodeColor( mGridAnnotationFontColor ) );
mapGridElem.setAttribute( "annotationPrecision", mGridAnnotationPrecision );
mapGridElem.setAttribute( "unit", mGridUnit );
mapGridElem.setAttribute( "blendMode", mBlendMode );
bool ok = QgsComposerMapItem::writeXML( mapGridElem, doc );
elem.appendChild( mapGridElem );
return ok;
}
bool QgsComposerMapGrid::readXML( const QDomElement& itemElem, const QDomDocument& doc )
{
Q_UNUSED( doc );
if ( itemElem.isNull() )
{
return false;
}
bool ok = QgsComposerMapItem::readXML( itemElem, doc );
//grid
mGridStyle = QgsComposerMapGrid::GridStyle( itemElem.attribute( "gridStyle", "0" ).toInt() );
mGridIntervalX = itemElem.attribute( "intervalX", "0" ).toDouble();
mGridIntervalY = itemElem.attribute( "intervalY", "0" ).toDouble();
mGridOffsetX = itemElem.attribute( "offsetX", "0" ).toDouble();
mGridOffsetY = itemElem.attribute( "offsetY", "0" ).toDouble();
mCrossLength = itemElem.attribute( "crossLength", "3" ).toDouble();
mGridFrameStyle = ( QgsComposerMapGrid::FrameStyle )itemElem.attribute( "gridFrameStyle", "0" ).toInt();
mGridFrameSides = ( QgsComposerMapGrid::FrameSideFlags )itemElem.attribute( "gridFrameSideFlags", "15" ).toInt();
mGridFrameWidth = itemElem.attribute( "gridFrameWidth", "2.0" ).toDouble();
mGridFramePenThickness = itemElem.attribute( "gridFramePenThickness", "0.3" ).toDouble();
mGridFramePenColor = QgsSymbolLayerV2Utils::decodeColor( itemElem.attribute( "gridFramePenColor", "0,0,0" ) );
mGridFrameFillColor1 = QgsSymbolLayerV2Utils::decodeColor( itemElem.attribute( "frameFillColor1", "255,255,255,255" ) );
mGridFrameFillColor2 = QgsSymbolLayerV2Utils::decodeColor( itemElem.attribute( "frameFillColor2", "0,0,0,255" ) );
mLeftFrameDivisions = QgsComposerMapGrid::DisplayMode( itemElem.attribute( "leftFrameDivisions", "0" ).toInt() );
mRightFrameDivisions = QgsComposerMapGrid::DisplayMode( itemElem.attribute( "rightFrameDivisions", "0" ).toInt() );
mTopFrameDivisions = QgsComposerMapGrid::DisplayMode( itemElem.attribute( "topFrameDivisions", "0" ).toInt() );
mBottomFrameDivisions = QgsComposerMapGrid::DisplayMode( itemElem.attribute( "bottomFrameDivisions", "0" ).toInt() );
QDomElement lineStyleElem = itemElem.firstChildElement( "lineStyle" );
if ( !lineStyleElem.isNull() )
{
QDomElement symbolElem = lineStyleElem.firstChildElement( "symbol" );
if ( !symbolElem.isNull() )
{
delete mGridLineSymbol;
mGridLineSymbol = QgsSymbolLayerV2Utils::loadSymbol<QgsLineSymbolV2>( symbolElem );
}
}
else
{
//old project file, read penWidth /penColorRed, penColorGreen, penColorBlue
mGridLineSymbol = QgsLineSymbolV2::createSimple( QgsStringMap() );
mGridLineSymbol->setWidth( itemElem.attribute( "penWidth", "0" ).toDouble() );
mGridLineSymbol->setColor( QColor( itemElem.attribute( "penColorRed", "0" ).toInt(),
itemElem.attribute( "penColorGreen", "0" ).toInt(),
itemElem.attribute( "penColorBlue", "0" ).toInt() ) );
}
QDomElement markerStyleElem = itemElem.firstChildElement( "markerStyle" );
if ( !markerStyleElem.isNull() )
{
QDomElement symbolElem = markerStyleElem.firstChildElement( "symbol" );
if ( !symbolElem.isNull() )
{
delete mGridMarkerSymbol;
mGridMarkerSymbol = QgsSymbolLayerV2Utils::loadSymbol<QgsMarkerSymbolV2>( symbolElem );
}
}
QDomElement crsElem = itemElem.firstChildElement( "spatialrefsys" );
if ( !crsElem.isNull() )
{
mCRS.readXML( const_cast<QDomElement&>( itemElem ) ); //better would be to change argument in QgsCoordinateReferenceSystem::readXML to const
}
else
{
mCRS = QgsCoordinateReferenceSystem();
}
mBlendMode = ( QPainter::CompositionMode )( itemElem.attribute( "blendMode", "0" ).toUInt() );
//annotation
mShowGridAnnotation = ( itemElem.attribute( "showAnnotation", "0" ) != "0" );
mGridAnnotationFormat = QgsComposerMapGrid::AnnotationFormat( itemElem.attribute( "annotationFormat", "0" ).toInt() );
mGridAnnotationExpressionString = itemElem.attribute( "annotationExpression" );
mGridAnnotationExpression.reset();
mLeftGridAnnotationPosition = QgsComposerMapGrid::AnnotationPosition( itemElem.attribute( "leftAnnotationPosition", "0" ).toInt() );
mRightGridAnnotationPosition = QgsComposerMapGrid::AnnotationPosition( itemElem.attribute( "rightAnnotationPosition", "0" ).toInt() );
mTopGridAnnotationPosition = QgsComposerMapGrid::AnnotationPosition( itemElem.attribute( "topAnnotationPosition", "0" ).toInt() );
mBottomGridAnnotationPosition = QgsComposerMapGrid::AnnotationPosition( itemElem.attribute( "bottomAnnotationPosition", "0" ).toInt() );
mLeftGridAnnotationDisplay = QgsComposerMapGrid::DisplayMode( itemElem.attribute( "leftAnnotationDisplay", "0" ).toInt() );
mRightGridAnnotationDisplay = QgsComposerMapGrid::DisplayMode( itemElem.attribute( "rightAnnotationDisplay", "0" ).toInt() );
mTopGridAnnotationDisplay = QgsComposerMapGrid::DisplayMode( itemElem.attribute( "topAnnotationDisplay", "0" ).toInt() );
mBottomGridAnnotationDisplay = QgsComposerMapGrid::DisplayMode( itemElem.attribute( "bottomAnnotationDisplay", "0" ).toInt() );
//upgrade pre-2.7 projects
if ( mLeftGridAnnotationPosition == QgsComposerMapGrid::Disabled )
{
mLeftGridAnnotationDisplay = QgsComposerMapGrid::HideAll;
mLeftGridAnnotationPosition = QgsComposerMapGrid::OutsideMapFrame;
}
if ( mRightGridAnnotationPosition == QgsComposerMapGrid::Disabled )
{
mRightGridAnnotationDisplay = QgsComposerMapGrid::HideAll;
mRightGridAnnotationPosition = QgsComposerMapGrid::OutsideMapFrame;
}
if ( mTopGridAnnotationPosition == QgsComposerMapGrid::Disabled )
{
mTopGridAnnotationDisplay = QgsComposerMapGrid::HideAll;
mTopGridAnnotationPosition = QgsComposerMapGrid::OutsideMapFrame;
}
if ( mBottomGridAnnotationPosition == QgsComposerMapGrid::Disabled )
{
mBottomGridAnnotationDisplay = QgsComposerMapGrid::HideAll;
mBottomGridAnnotationPosition = QgsComposerMapGrid::OutsideMapFrame;
}
mLeftGridAnnotationDirection = QgsComposerMapGrid::AnnotationDirection( itemElem.attribute( "leftAnnotationDirection", "0" ).toInt() );
mRightGridAnnotationDirection = QgsComposerMapGrid::AnnotationDirection( itemElem.attribute( "rightAnnotationDirection", "0" ).toInt() );
mTopGridAnnotationDirection = QgsComposerMapGrid::AnnotationDirection( itemElem.attribute( "topAnnotationDirection", "0" ).toInt() );
mBottomGridAnnotationDirection = QgsComposerMapGrid::AnnotationDirection( itemElem.attribute( "bottomAnnotationDirection", "0" ).toInt() );
mAnnotationFrameDistance = itemElem.attribute( "frameAnnotationDistance", "0" ).toDouble();
if ( !QgsFontUtils::setFromXmlChildNode( mGridAnnotationFont, itemElem, "annotationFontProperties" ) )
{
mGridAnnotationFont.fromString( itemElem.attribute( "annotationFont", "" ) );
}
mGridAnnotationFontColor = QgsSymbolLayerV2Utils::decodeColor( itemElem.attribute( "annotationFontColor", "0,0,0,255" ) );
mGridAnnotationPrecision = itemElem.attribute( "annotationPrecision", "3" ).toInt();
int gridUnitInt = itemElem.attribute( "unit", QString::number( MapUnit ) ).toInt();
mGridUnit = ( gridUnitInt <= ( int )CM ) ? ( GridUnit )gridUnitInt : MapUnit;
return ok;
}
void QgsComposerMapGrid::setCrs( const QgsCoordinateReferenceSystem &crs )
{
mCRS = crs;
mTransformDirty = true;
}
bool QgsComposerMapGrid::usesAdvancedEffects() const
{
return mBlendMode == QPainter::CompositionMode_SourceOver;
}
QPolygonF QgsComposerMapGrid::scalePolygon( const QPolygonF &polygon, const double scale ) const
{
QTransform t = QTransform::fromScale( scale, scale );
return t.map( polygon );
}
void QgsComposerMapGrid::drawGridCRSTransform( QgsRenderContext &context, double dotsPerMM, QList< QPair< double, QLineF > > &horizontalLines,
QList< QPair< double, QLineF > > &verticalLines )
{
if ( !mComposerMap || !mEnabled )
{
return;
}
//has map extent/scale changed?
QPolygonF mapPolygon = mComposerMap->transformedMapPolygon();
if ( mapPolygon != mPrevMapPolygon )
{
mTransformDirty = true;
mPrevMapPolygon = mapPolygon;
}
if ( mTransformDirty )
{
calculateCRSTransformLines();
}
//draw lines
if ( mGridStyle == QgsComposerMapGrid::Solid )
{
QList< QPair< double, QPolygonF > >::const_iterator xGridIt = mTransformedXLines.constBegin();
for ( ; xGridIt != mTransformedXLines.constEnd(); ++xGridIt )
{
drawGridLine( scalePolygon( xGridIt->second, dotsPerMM ), context );
}
QList< QPair< double, QPolygonF > >::const_iterator yGridIt = mTransformedYLines.constBegin();
for ( ; yGridIt != mTransformedYLines.constEnd(); ++yGridIt )
{
drawGridLine( scalePolygon( yGridIt->second, dotsPerMM ), context );
}
}
else if ( mGridStyle == QgsComposerMapGrid::Cross || mGridStyle == QgsComposerMapGrid::Markers )
{
double maxX = mComposerMap->rect().width();
double maxY = mComposerMap->rect().height();
QList< QgsPoint >::const_iterator intersectionIt = mTransformedIntersections.constBegin();
for ( ; intersectionIt != mTransformedIntersections.constEnd(); ++intersectionIt )
{
double x = intersectionIt->x();
double y = intersectionIt->y();
if ( mGridStyle == QgsComposerMapGrid::Cross )
{
//ensure that crosses don't overshoot the map item bounds
QLineF line1 = QLineF( x - mCrossLength, y, x + mCrossLength, y );
line1.p1().rx() = line1.p1().x() < 0 ? 0 : line1.p1().x();
line1.p2().rx() = line1.p2().x() > maxX ? maxX : line1.p2().x();
QLineF line2 = QLineF( x, y - mCrossLength, x, y + mCrossLength );
line2.p1().ry() = line2.p1().y() < 0 ? 0 : line2.p1().y();
line2.p2().ry() = line2.p2().y() > maxY ? maxY : line2.p2().y();
//draw line using coordinates scaled to dots
drawGridLine( QLineF( line1.p1() * dotsPerMM, line1.p2() * dotsPerMM ), context );
drawGridLine( QLineF( line2.p1() * dotsPerMM, line2.p2() * dotsPerMM ), context );
}
else if ( mGridStyle == QgsComposerMapGrid::Markers )
{
drawGridMarker( QPointF( x, y ) * dotsPerMM, context );
}
}
}
//convert QPolygonF to QLineF to draw grid frames and annotations
QList< QPair< double, QPolygonF > >::const_iterator yGridLineIt = mTransformedYLines.constBegin();
for ( ; yGridLineIt != mTransformedYLines.constEnd(); ++yGridLineIt )
{
verticalLines.push_back( qMakePair( yGridLineIt->first, QLineF( yGridLineIt->second.first(), yGridLineIt->second.last() ) ) );
}
QList< QPair< double, QPolygonF > >::const_iterator xGridLineIt = mTransformedXLines.constBegin();
for ( ; xGridLineIt != mTransformedXLines.constEnd(); ++xGridLineIt )
{
horizontalLines.push_back( qMakePair( xGridLineIt->first, QLineF( xGridLineIt->second.first(), xGridLineIt->second.last() ) ) );
}
}
void QgsComposerMapGrid::calculateCRSTransformLines()
{
QgsRectangle crsBoundingRect;
QgsCoordinateTransform inverseTr;
if ( crsGridParams( crsBoundingRect, inverseTr ) != 0 )
{
return;
}
//calculate x grid lines
mTransformedXLines.clear();
xGridLinesCRSTransform( crsBoundingRect, inverseTr, mTransformedXLines );
//calculate y grid lines
mTransformedYLines.clear();
yGridLinesCRSTransform( crsBoundingRect, inverseTr, mTransformedYLines );
if ( mGridStyle == QgsComposerMapGrid::Cross || mGridStyle == QgsComposerMapGrid::Markers )
{
//cross or markers style - we also need to calculate intersections of lines
//first convert lines to QgsGeometry
QList< QgsGeometry* > yLines;
QList< QPair< double, QPolygonF > >::const_iterator yGridIt = mTransformedYLines.constBegin();
for ( ; yGridIt != mTransformedYLines.constEnd(); ++yGridIt )
{
QgsPolyline yLine;
for ( int i = 0; i < ( *yGridIt ).second.size(); ++i )
{
yLine.append( QgsPoint(( *yGridIt ).second.at( i ).x(), ( *yGridIt ).second.at( i ).y() ) );
}
yLines << QgsGeometry::fromPolyline( yLine );
}
QList< QgsGeometry* > xLines;
QList< QPair< double, QPolygonF > >::const_iterator xGridIt = mTransformedXLines.constBegin();
for ( ; xGridIt != mTransformedXLines.constEnd(); ++xGridIt )
{
QgsPolyline xLine;
for ( int i = 0; i < ( *xGridIt ).second.size(); ++i )
{
xLine.append( QgsPoint(( *xGridIt ).second.at( i ).x(), ( *xGridIt ).second.at( i ).y() ) );
}
xLines << QgsGeometry::fromPolyline( xLine );
}
//now, loop through geometries and calculate intersection points
mTransformedIntersections.clear();
QList< QgsGeometry* >::const_iterator yLineIt = yLines.constBegin();
for ( ; yLineIt != yLines.constEnd(); ++yLineIt )
{
QList< QgsGeometry* >::const_iterator xLineIt = xLines.constBegin();
for ( ; xLineIt != xLines.constEnd(); ++xLineIt )
{
//look for intersections between lines
QgsGeometry* intersects = ( *yLineIt )->intersection(( *xLineIt ) );
if ( !intersects )
continue;
//go through all intersections and draw grid markers/crosses
int i = 0;
QgsPoint vertex = intersects->vertexAt( i );
while ( vertex != QgsPoint( 0, 0 ) )
{
mTransformedIntersections << vertex;
i = i + 1;
vertex = intersects->vertexAt( i );
}
delete intersects;
}
}
//clean up
qDeleteAll( yLines );
yLines.clear();
qDeleteAll( xLines );
xLines.clear();
}
mTransformDirty = false;
}
void QgsComposerMapGrid::draw( QPainter* p )
{
if ( !mComposerMap || !mEnabled )
{
return;
}
QPaintDevice* thePaintDevice = p->device();
if ( !thePaintDevice )
{
return;
}
p->save();
p->setCompositionMode( mBlendMode );
p->setRenderHint( QPainter::Antialiasing );
QRectF thisPaintRect = QRectF( 0, 0, mComposerMap->rect().width(), mComposerMap->rect().height() );
p->setClipRect( thisPaintRect );
if ( thisPaintRect != mPrevPaintRect )
{
//rect has changed, so need to recalculate transform
mTransformDirty = true;
mPrevPaintRect = thisPaintRect;
}
//setup painter scaling to dots so that raster symbology is drawn to scale
double dotsPerMM = thePaintDevice->logicalDpiX() / 25.4;
p->scale( 1 / dotsPerMM, 1 / dotsPerMM ); //scale painter from mm to dots
//setup render context
QgsMapSettings ms = mComposerMap->composition()->mapSettings();
//context units should be in dots
ms.setOutputSize( QSizeF( mComposerMap->rect().width() * dotsPerMM, mComposerMap->rect().height() * dotsPerMM ).toSize() );
ms.setExtent( *mComposerMap->currentMapExtent() );
ms.setOutputDpi( p->device()->logicalDpiX() );
QgsRenderContext context = QgsRenderContext::fromMapSettings( ms );
context.setForceVectorOutput( true );
context.setPainter( p );
QgsExpressionContext* expressionContext = createExpressionContext();
context.setExpressionContext( *expressionContext );
delete expressionContext;
QList< QPair< double, QLineF > > verticalLines;
QList< QPair< double, QLineF > > horizontalLines;
//is grid in a different crs than map?
if ( mGridUnit == MapUnit && mCRS.isValid() && mCRS != ms.destinationCrs() )
{
drawGridCRSTransform( context, dotsPerMM, horizontalLines, verticalLines );
}
else
{
drawGridNoTransform( context, dotsPerMM, horizontalLines, verticalLines );
}
p->restore();
p->setClipping( false );
#ifdef Q_OS_MAC
//QPainter::setClipping(false) seems to be broken on OSX (#12747). So we hack around it by
//setting a larger clip rect
p->setClipRect( mComposerMap->mapRectFromScene( mComposerMap->sceneBoundingRect() ).adjusted( -10, -10, 10, 10 ) );
#endif
if ( mGridFrameStyle != QgsComposerMapGrid::NoFrame )
{
drawGridFrame( p, horizontalLines, verticalLines );
}
if ( mShowGridAnnotation )
{
drawCoordinateAnnotations( p, horizontalLines, verticalLines, context.expressionContext() );
}
}
void QgsComposerMapGrid::drawGridNoTransform( QgsRenderContext &context, double dotsPerMM, QList< QPair< double, QLineF > > &horizontalLines,
QList< QPair< double, QLineF > > &verticalLines ) const
{
//get line positions
yGridLines( verticalLines );
QList< QPair< double, QLineF > >::const_iterator vIt = verticalLines.constBegin();
xGridLines( horizontalLines );
QList< QPair< double, QLineF > >::const_iterator hIt = horizontalLines.constBegin();
//simple approach: draw vertical lines first, then horizontal ones
if ( mGridStyle == QgsComposerMapGrid::Solid )
{
//we need to scale line coordinates to dots, rather than mm, since the painter has already been scaled to dots
//this is done by multiplying each line coordinate by dotsPerMM
QLineF line;
for ( ; vIt != verticalLines.constEnd(); ++vIt )
{
line = QLineF( vIt->second.p1() * dotsPerMM, vIt->second.p2() * dotsPerMM );
drawGridLine( line, context );
}
for ( ; hIt != horizontalLines.constEnd(); ++hIt )
{
line = QLineF( hIt->second.p1() * dotsPerMM, hIt->second.p2() * dotsPerMM );
drawGridLine( line, context );
}
}
else if ( mGridStyle != QgsComposerMapGrid::FrameAnnotationsOnly ) //cross or markers
{
QPointF intersectionPoint, crossEnd1, crossEnd2;
for ( ; vIt != verticalLines.constEnd(); ++vIt )
{
//test for intersection with every horizontal line
hIt = horizontalLines.constBegin();
for ( ; hIt != horizontalLines.constEnd(); ++hIt )
{
if ( hIt->second.intersect( vIt->second, &intersectionPoint ) == QLineF::BoundedIntersection )
{
if ( mGridStyle == QgsComposerMapGrid::Cross )
{
//apply a threshold to avoid calculate point if the two points are very close together (can lead to artifacts)
crossEnd1 = (( intersectionPoint - vIt->second.p1() ).manhattanLength() > 0.01 ) ?
QgsSymbolLayerV2Utils::pointOnLineWithDistance( intersectionPoint, vIt->second.p1(), mCrossLength ) : intersectionPoint;
crossEnd2 = (( intersectionPoint - vIt->second.p2() ).manhattanLength() > 0.01 ) ?
QgsSymbolLayerV2Utils::pointOnLineWithDistance( intersectionPoint, vIt->second.p2(), mCrossLength ) : intersectionPoint;
//draw line using coordinates scaled to dots
drawGridLine( QLineF( crossEnd1 * dotsPerMM, crossEnd2 * dotsPerMM ), context );
}
else if ( mGridStyle == QgsComposerMapGrid::Markers )
{
drawGridMarker( intersectionPoint * dotsPerMM, context );
}
}
}
}
if ( mGridStyle == QgsComposerMapGrid::Markers )
{
//markers mode, so we have no need to process horizontal lines (we've already
//drawn markers on the intersections between horizontal and vertical lines)
return;
}
hIt = horizontalLines.constBegin();
for ( ; hIt != horizontalLines.constEnd(); ++hIt )
{
vIt = verticalLines.constBegin();
for ( ; vIt != verticalLines.constEnd(); ++vIt )
{
if ( vIt->second.intersect( hIt->second, &intersectionPoint ) == QLineF::BoundedIntersection )
{
//apply a threshold to avoid calculate point if the two points are very close together (can lead to artifacts)
crossEnd1 = (( intersectionPoint - hIt->second.p1() ).manhattanLength() > 0.01 ) ?
QgsSymbolLayerV2Utils::pointOnLineWithDistance( intersectionPoint, hIt->second.p1(), mCrossLength ) : intersectionPoint;
crossEnd2 = (( intersectionPoint - hIt->second.p2() ).manhattanLength() > 0.01 ) ?
QgsSymbolLayerV2Utils::pointOnLineWithDistance( intersectionPoint, hIt->second.p2(), mCrossLength ) : intersectionPoint;
//draw line using coordinates scaled to dots
drawGridLine( QLineF( crossEnd1 * dotsPerMM, crossEnd2 * dotsPerMM ), context );
}
}
}
}
}
void QgsComposerMapGrid::drawGridFrame( QPainter* p, const QList< QPair< double, QLineF > >& hLines, const QList< QPair< double, QLineF > >& vLines ) const
{
p->save();
p->setRenderHint( QPainter::Antialiasing );
//Sort the coordinate positions for each side
QMap< double, double > leftGridFrame;
QMap< double, double > rightGridFrame;
QMap< double, double > topGridFrame;
QMap< double, double > bottomGridFrame;
sortGridLinesOnBorders( hLines, vLines, leftGridFrame, rightGridFrame, topGridFrame, bottomGridFrame );
if ( testFrameSideFlag( QgsComposerMapGrid::FrameLeft ) )
{
drawGridFrameBorder( p, leftGridFrame, QgsComposerMapGrid::Left );
}
if ( testFrameSideFlag( QgsComposerMapGrid::FrameRight ) )
{
drawGridFrameBorder( p, rightGridFrame, QgsComposerMapGrid::Right );
}
if ( testFrameSideFlag( QgsComposerMapGrid::FrameTop ) )
{
drawGridFrameBorder( p, topGridFrame, QgsComposerMapGrid::Top );
}
if ( testFrameSideFlag( QgsComposerMapGrid::FrameBottom ) )
{
drawGridFrameBorder( p, bottomGridFrame, QgsComposerMapGrid::Bottom );
}
p->restore();
}
void QgsComposerMapGrid::drawGridLine( const QLineF& line, QgsRenderContext& context ) const
{
QPolygonF poly;
poly << line.p1() << line.p2();
drawGridLine( poly, context );
}
void QgsComposerMapGrid::drawGridLine( const QPolygonF& line, QgsRenderContext& context ) const
{
if ( !mComposerMap || !mComposerMap->composition() || !mGridLineSymbol )
{
return;
}
mGridLineSymbol->startRender( context );
mGridLineSymbol->renderPolyline( line, 0, context );
mGridLineSymbol->stopRender( context );
}
void QgsComposerMapGrid::drawGridMarker( const QPointF& point, QgsRenderContext& context ) const
{
if ( !mComposerMap || !mComposerMap->composition() || !mGridMarkerSymbol )
{
return;
}
mGridMarkerSymbol->startRender( context );
mGridMarkerSymbol->renderPoint( point, 0, context );
mGridMarkerSymbol->stopRender( context );
}
void QgsComposerMapGrid::drawGridFrameBorder( QPainter* p, const QMap< double, double >& borderPos, QgsComposerMapGrid::BorderSide border ) const
{
if ( !mComposerMap )
{
return;
}
switch ( mGridFrameStyle )
{
case QgsComposerMapGrid::Zebra:
drawGridFrameZebraBorder( p, borderPos, border );
break;
case QgsComposerMapGrid::InteriorTicks:
case QgsComposerMapGrid::ExteriorTicks:
case QgsComposerMapGrid::InteriorExteriorTicks:
drawGridFrameTicks( p, borderPos, border );
break;
case QgsComposerMapGrid::LineBorder:
drawGridFrameLineBorder( p, border );
break;
case QgsComposerMapGrid::NoFrame:
break;
}
}
void QgsComposerMapGrid::drawGridFrameZebraBorder( QPainter* p, const QMap< double, double >& borderPos, QgsComposerMapGrid::BorderSide border ) const
{
if ( !mComposerMap )
{
return;
}
QMap< double, double > pos = borderPos;
double currentCoord = 0;
if (( border == QgsComposerMapGrid::Left || border == QgsComposerMapGrid::Right ) && testFrameSideFlag( QgsComposerMapGrid::FrameTop ) )
{
currentCoord = - mGridFrameWidth;
pos.insert( 0, 0 );
}
else if (( border == QgsComposerMapGrid::Top || border == QgsComposerMapGrid::Bottom ) && testFrameSideFlag( QgsComposerMapGrid::FrameLeft ) )
{
currentCoord = - mGridFrameWidth;
pos.insert( 0, 0 );
}
bool color1 = true;
double x = 0;
double y = 0;
double width = 0;
double height = 0;
if ( border == QgsComposerMapGrid::Left || border == QgsComposerMapGrid::Right )
{
pos.insert( mComposerMap->rect().height(), mComposerMap->rect().height() );
if ( testFrameSideFlag( QgsComposerMapGrid::FrameBottom ) )
{
pos.insert( mComposerMap->rect().height() + mGridFrameWidth, mComposerMap->rect().height() + mGridFrameWidth );
}
}
else if ( border == QgsComposerMapGrid::Top || border == QgsComposerMapGrid::Bottom )
{
pos.insert( mComposerMap->rect().width(), mComposerMap->rect().width() );
if ( testFrameSideFlag( QgsComposerMapGrid::FrameRight ) )
{
pos.insert( mComposerMap->rect().width() + mGridFrameWidth, mComposerMap->rect().width() + mGridFrameWidth );
}
}
//set pen to current frame pen
QPen framePen = QPen( mGridFramePenColor );
framePen.setWidthF( mGridFramePenThickness );
framePen.setJoinStyle( Qt::MiterJoin );
p->setPen( framePen );
QMap< double, double >::const_iterator posIt = pos.constBegin();
for ( ; posIt != pos.constEnd(); ++posIt )
{
p->setBrush( QBrush( color1 ? mGridFrameFillColor1 : mGridFrameFillColor2 ) );
if ( border == QgsComposerMapGrid::Left || border == QgsComposerMapGrid::Right )
{
height = posIt.key() - currentCoord;
width = mGridFrameWidth;
x = ( border == QgsComposerMapGrid::Left ) ? -mGridFrameWidth : mComposerMap->rect().width();
y = currentCoord;
}
else //top or bottom
{
height = mGridFrameWidth;
width = posIt.key() - currentCoord;
x = currentCoord;
y = ( border == QgsComposerMapGrid::Top ) ? -mGridFrameWidth : mComposerMap->rect().height();
}
p->drawRect( QRectF( x, y, width, height ) );
currentCoord = posIt.key();
color1 = !color1;
}
}
void QgsComposerMapGrid::drawGridFrameTicks( QPainter* p, const QMap< double, double >& borderPos, QgsComposerMapGrid::BorderSide border ) const
{
if ( !mComposerMap )
{
return;
}
double x = 0;
double y = 0;
double width = 0;
double height = 0;
//set pen to current frame pen
QPen framePen = QPen( mGridFramePenColor );
framePen.setWidthF( mGridFramePenThickness );
framePen.setCapStyle( Qt::FlatCap );
p->setBrush( Qt::NoBrush );
p->setPen( framePen );
QMap< double, double >::const_iterator posIt = borderPos.constBegin();
for ( ; posIt != borderPos.constEnd(); ++posIt )
{
if ( border == QgsComposerMapGrid::Left || border == QgsComposerMapGrid::Right )
{
y = posIt.key();
height = 0;
if ( mGridFrameStyle == QgsComposerMapGrid::InteriorTicks )
{
width = mGridFrameWidth;
x = ( border == QgsComposerMapGrid::Left ) ? 0 : mComposerMap->rect().width() - mGridFrameWidth;
}
else if ( mGridFrameStyle == QgsComposerMapGrid::ExteriorTicks )
{
width = mGridFrameWidth;
x = ( border == QgsComposerMapGrid::Left ) ? - mGridFrameWidth : mComposerMap->rect().width();
}
else if ( mGridFrameStyle == QgsComposerMapGrid::InteriorExteriorTicks )
{
width = mGridFrameWidth * 2;
x = ( border == QgsComposerMapGrid::Left ) ? - mGridFrameWidth : mComposerMap->rect().width() - mGridFrameWidth;
}
}
else //top or bottom
{
x = posIt.key();
width = 0;
if ( mGridFrameStyle == QgsComposerMapGrid::InteriorTicks )
{
height = mGridFrameWidth;
y = ( border == QgsComposerMapGrid::Top ) ? 0 : mComposerMap->rect().height() - mGridFrameWidth;
}
else if ( mGridFrameStyle == QgsComposerMapGrid::ExteriorTicks )
{
height = mGridFrameWidth;