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qgslinesymbollayer.cpp
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qgslinesymbollayer.cpp
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/***************************************************************************
qgslinesymbollayer.cpp
---------------------
begin : November 2009
copyright : (C) 2009 by Martin Dobias
email : wonder dot sk at gmail dot 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 "qgslinesymbollayer.h"
#include "qgscurve.h"
#include "qgscurvepolygon.h"
#include "qgsdxfexport.h"
#include "qgssymbollayerutils.h"
#include "qgsexpression.h"
#include "qgsrendercontext.h"
#include "qgslogger.h"
#include "qgsvectorlayer.h"
#include "qgsgeometrysimplifier.h"
#include "qgsunittypes.h"
#include "qgsproperty.h"
#include <QPainter>
#include <QDomDocument>
#include <QDomElement>
#include <cmath>
QgsSimpleLineSymbolLayer::QgsSimpleLineSymbolLayer( const QColor &color, double width, Qt::PenStyle penStyle )
: mPenStyle( penStyle )
{
mColor = color;
mWidth = width;
mCustomDashVector << 5 << 2;
}
void QgsSimpleLineSymbolLayer::setOutputUnit( QgsUnitTypes::RenderUnit unit )
{
QgsLineSymbolLayer::setOutputUnit( unit );
mWidthUnit = unit;
mOffsetUnit = unit;
mCustomDashPatternUnit = unit;
}
QgsUnitTypes::RenderUnit QgsSimpleLineSymbolLayer::outputUnit() const
{
QgsUnitTypes::RenderUnit unit = QgsLineSymbolLayer::outputUnit();
if ( mWidthUnit != unit || mOffsetUnit != unit || mCustomDashPatternUnit != unit )
{
return QgsUnitTypes::RenderUnknownUnit;
}
return unit;
}
void QgsSimpleLineSymbolLayer::setMapUnitScale( const QgsMapUnitScale &scale )
{
QgsLineSymbolLayer::setMapUnitScale( scale );
mWidthMapUnitScale = scale;
mOffsetMapUnitScale = scale;
mCustomDashPatternMapUnitScale = scale;
}
QgsMapUnitScale QgsSimpleLineSymbolLayer::mapUnitScale() const
{
if ( QgsLineSymbolLayer::mapUnitScale() == mWidthMapUnitScale &&
mWidthMapUnitScale == mOffsetMapUnitScale &&
mOffsetMapUnitScale == mCustomDashPatternMapUnitScale )
{
return mWidthMapUnitScale;
}
return QgsMapUnitScale();
}
QgsSymbolLayer *QgsSimpleLineSymbolLayer::create( const QgsStringMap &props )
{
QColor color = DEFAULT_SIMPLELINE_COLOR;
double width = DEFAULT_SIMPLELINE_WIDTH;
Qt::PenStyle penStyle = DEFAULT_SIMPLELINE_PENSTYLE;
if ( props.contains( QStringLiteral( "line_color" ) ) )
{
color = QgsSymbolLayerUtils::decodeColor( props[QStringLiteral( "line_color" )] );
}
else if ( props.contains( QStringLiteral( "outline_color" ) ) )
{
color = QgsSymbolLayerUtils::decodeColor( props[QStringLiteral( "outline_color" )] );
}
else if ( props.contains( QStringLiteral( "color" ) ) )
{
//pre 2.5 projects used "color"
color = QgsSymbolLayerUtils::decodeColor( props[QStringLiteral( "color" )] );
}
if ( props.contains( QStringLiteral( "line_width" ) ) )
{
width = props[QStringLiteral( "line_width" )].toDouble();
}
else if ( props.contains( QStringLiteral( "outline_width" ) ) )
{
width = props[QStringLiteral( "outline_width" )].toDouble();
}
else if ( props.contains( QStringLiteral( "width" ) ) )
{
//pre 2.5 projects used "width"
width = props[QStringLiteral( "width" )].toDouble();
}
if ( props.contains( QStringLiteral( "line_style" ) ) )
{
penStyle = QgsSymbolLayerUtils::decodePenStyle( props[QStringLiteral( "line_style" )] );
}
else if ( props.contains( QStringLiteral( "outline_style" ) ) )
{
penStyle = QgsSymbolLayerUtils::decodePenStyle( props[QStringLiteral( "outline_style" )] );
}
else if ( props.contains( QStringLiteral( "penstyle" ) ) )
{
penStyle = QgsSymbolLayerUtils::decodePenStyle( props[QStringLiteral( "penstyle" )] );
}
QgsSimpleLineSymbolLayer *l = new QgsSimpleLineSymbolLayer( color, width, penStyle );
if ( props.contains( QStringLiteral( "line_width_unit" ) ) )
{
l->setWidthUnit( QgsUnitTypes::decodeRenderUnit( props[QStringLiteral( "line_width_unit" )] ) );
}
else if ( props.contains( QStringLiteral( "outline_width_unit" ) ) )
{
l->setWidthUnit( QgsUnitTypes::decodeRenderUnit( props[QStringLiteral( "outline_width_unit" )] ) );
}
else if ( props.contains( QStringLiteral( "width_unit" ) ) )
{
//pre 2.5 projects used "width_unit"
l->setWidthUnit( QgsUnitTypes::decodeRenderUnit( props[QStringLiteral( "width_unit" )] ) );
}
if ( props.contains( QStringLiteral( "width_map_unit_scale" ) ) )
l->setWidthMapUnitScale( QgsSymbolLayerUtils::decodeMapUnitScale( props[QStringLiteral( "width_map_unit_scale" )] ) );
if ( props.contains( QStringLiteral( "offset" ) ) )
l->setOffset( props[QStringLiteral( "offset" )].toDouble() );
if ( props.contains( QStringLiteral( "offset_unit" ) ) )
l->setOffsetUnit( QgsUnitTypes::decodeRenderUnit( props[QStringLiteral( "offset_unit" )] ) );
if ( props.contains( QStringLiteral( "offset_map_unit_scale" ) ) )
l->setOffsetMapUnitScale( QgsSymbolLayerUtils::decodeMapUnitScale( props[QStringLiteral( "offset_map_unit_scale" )] ) );
if ( props.contains( QStringLiteral( "joinstyle" ) ) )
l->setPenJoinStyle( QgsSymbolLayerUtils::decodePenJoinStyle( props[QStringLiteral( "joinstyle" )] ) );
if ( props.contains( QStringLiteral( "capstyle" ) ) )
l->setPenCapStyle( QgsSymbolLayerUtils::decodePenCapStyle( props[QStringLiteral( "capstyle" )] ) );
if ( props.contains( QStringLiteral( "use_custom_dash" ) ) )
{
l->setUseCustomDashPattern( props[QStringLiteral( "use_custom_dash" )].toInt() );
}
if ( props.contains( QStringLiteral( "customdash" ) ) )
{
l->setCustomDashVector( QgsSymbolLayerUtils::decodeRealVector( props[QStringLiteral( "customdash" )] ) );
}
if ( props.contains( QStringLiteral( "customdash_unit" ) ) )
{
l->setCustomDashPatternUnit( QgsUnitTypes::decodeRenderUnit( props[QStringLiteral( "customdash_unit" )] ) );
}
if ( props.contains( QStringLiteral( "customdash_map_unit_scale" ) ) )
{
l->setCustomDashPatternMapUnitScale( QgsSymbolLayerUtils::decodeMapUnitScale( props[QStringLiteral( "customdash_map_unit_scale" )] ) );
}
if ( props.contains( QStringLiteral( "draw_inside_polygon" ) ) )
{
l->setDrawInsidePolygon( props[QStringLiteral( "draw_inside_polygon" )].toInt() );
}
l->restoreOldDataDefinedProperties( props );
return l;
}
QString QgsSimpleLineSymbolLayer::layerType() const
{
return QStringLiteral( "SimpleLine" );
}
void QgsSimpleLineSymbolLayer::startRender( QgsSymbolRenderContext &context )
{
QColor penColor = mColor;
penColor.setAlphaF( mColor.alphaF() * context.opacity() );
mPen.setColor( penColor );
double scaledWidth = context.renderContext().convertToPainterUnits( mWidth, mWidthUnit, mWidthMapUnitScale );
mPen.setWidthF( scaledWidth );
if ( mUseCustomDashPattern && !qgsDoubleNear( scaledWidth, 0 ) )
{
mPen.setStyle( Qt::CustomDashLine );
//scale pattern vector
double dashWidthDiv = scaledWidth;
//fix dash pattern width in Qt 4.8
QStringList versionSplit = QString( qVersion() ).split( '.' );
if ( versionSplit.size() > 1
&& versionSplit.at( 1 ).toInt() >= 8
&& scaledWidth < 1.0 )
{
dashWidthDiv = 1.0;
}
QVector<qreal> scaledVector;
QVector<qreal>::const_iterator it = mCustomDashVector.constBegin();
for ( ; it != mCustomDashVector.constEnd(); ++it )
{
//the dash is specified in terms of pen widths, therefore the division
scaledVector << context.renderContext().convertToPainterUnits( ( *it ), mCustomDashPatternUnit, mCustomDashPatternMapUnitScale ) / dashWidthDiv;
}
mPen.setDashPattern( scaledVector );
}
else
{
mPen.setStyle( mPenStyle );
}
mPen.setJoinStyle( mPenJoinStyle );
mPen.setCapStyle( mPenCapStyle );
mSelPen = mPen;
QColor selColor = context.renderContext().selectionColor();
if ( ! SELECTION_IS_OPAQUE )
selColor.setAlphaF( context.opacity() );
mSelPen.setColor( selColor );
}
void QgsSimpleLineSymbolLayer::stopRender( QgsSymbolRenderContext &context )
{
Q_UNUSED( context );
}
void QgsSimpleLineSymbolLayer::renderPolygonStroke( const QPolygonF &points, QList<QPolygonF> *rings, QgsSymbolRenderContext &context )
{
QPainter *p = context.renderContext().painter();
if ( !p )
{
return;
}
if ( mDrawInsidePolygon )
{
//only drawing the line on the interior of the polygon, so set clip path for painter
p->save();
QPainterPath clipPath;
clipPath.addPolygon( points );
if ( rings )
{
//add polygon rings
QList<QPolygonF>::const_iterator it = rings->constBegin();
for ( ; it != rings->constEnd(); ++it )
{
QPolygonF ring = *it;
clipPath.addPolygon( ring );
}
}
//use intersect mode, as a clip path may already exist (e.g., for composer maps)
p->setClipPath( clipPath, Qt::IntersectClip );
}
renderPolyline( points, context );
if ( rings )
{
mOffset = -mOffset; // invert the offset for rings!
Q_FOREACH ( const QPolygonF &ring, *rings )
renderPolyline( ring, context );
mOffset = -mOffset;
}
if ( mDrawInsidePolygon )
{
//restore painter to reset clip path
p->restore();
}
}
void QgsSimpleLineSymbolLayer::renderPolyline( const QPolygonF &points, QgsSymbolRenderContext &context )
{
QPainter *p = context.renderContext().painter();
if ( !p )
{
return;
}
double offset = mOffset;
applyDataDefinedSymbology( context, mPen, mSelPen, offset );
p->setPen( context.selected() ? mSelPen : mPen );
p->setBrush( Qt::NoBrush );
// Disable 'Antialiasing' if the geometry was generalized in the current RenderContext (We known that it must have least #2 points).
if ( points.size() <= 2 &&
( context.renderContext().vectorSimplifyMethod().simplifyHints() & QgsVectorSimplifyMethod::AntialiasingSimplification ) &&
QgsAbstractGeometrySimplifier::isGeneralizableByDeviceBoundingBox( points, context.renderContext().vectorSimplifyMethod().threshold() ) &&
( p->renderHints() & QPainter::Antialiasing ) )
{
p->setRenderHint( QPainter::Antialiasing, false );
#if 0
p->drawPolyline( points );
#else
QPainterPath path;
path.addPolygon( points );
p->drawPath( path );
#endif
p->setRenderHint( QPainter::Antialiasing, true );
return;
}
if ( qgsDoubleNear( offset, 0 ) )
{
#if 0
p->drawPolyline( points );
#else
QPainterPath path;
path.addPolygon( points );
p->drawPath( path );
#endif
}
else
{
double scaledOffset = context.renderContext().convertToPainterUnits( offset, mOffsetUnit, mOffsetMapUnitScale );
QList<QPolygonF> mline = ::offsetLine( points, scaledOffset, context.originalGeometryType() != QgsWkbTypes::UnknownGeometry ? context.originalGeometryType() : QgsWkbTypes::LineGeometry );
for ( int part = 0; part < mline.count(); ++part )
{
#if 0
p->drawPolyline( mline );
#else
QPainterPath path;
path.addPolygon( mline[ part ] );
p->drawPath( path );
#endif
}
}
}
QgsStringMap QgsSimpleLineSymbolLayer::properties() const
{
QgsStringMap map;
map[QStringLiteral( "line_color" )] = QgsSymbolLayerUtils::encodeColor( mColor );
map[QStringLiteral( "line_width" )] = QString::number( mWidth );
map[QStringLiteral( "line_width_unit" )] = QgsUnitTypes::encodeUnit( mWidthUnit );
map[QStringLiteral( "width_map_unit_scale" )] = QgsSymbolLayerUtils::encodeMapUnitScale( mWidthMapUnitScale );
map[QStringLiteral( "line_style" )] = QgsSymbolLayerUtils::encodePenStyle( mPenStyle );
map[QStringLiteral( "joinstyle" )] = QgsSymbolLayerUtils::encodePenJoinStyle( mPenJoinStyle );
map[QStringLiteral( "capstyle" )] = QgsSymbolLayerUtils::encodePenCapStyle( mPenCapStyle );
map[QStringLiteral( "offset" )] = QString::number( mOffset );
map[QStringLiteral( "offset_unit" )] = QgsUnitTypes::encodeUnit( mOffsetUnit );
map[QStringLiteral( "offset_map_unit_scale" )] = QgsSymbolLayerUtils::encodeMapUnitScale( mOffsetMapUnitScale );
map[QStringLiteral( "use_custom_dash" )] = ( mUseCustomDashPattern ? QStringLiteral( "1" ) : QStringLiteral( "0" ) );
map[QStringLiteral( "customdash" )] = QgsSymbolLayerUtils::encodeRealVector( mCustomDashVector );
map[QStringLiteral( "customdash_unit" )] = QgsUnitTypes::encodeUnit( mCustomDashPatternUnit );
map[QStringLiteral( "customdash_map_unit_scale" )] = QgsSymbolLayerUtils::encodeMapUnitScale( mCustomDashPatternMapUnitScale );
map[QStringLiteral( "draw_inside_polygon" )] = ( mDrawInsidePolygon ? QStringLiteral( "1" ) : QStringLiteral( "0" ) );
return map;
}
QgsSimpleLineSymbolLayer *QgsSimpleLineSymbolLayer::clone() const
{
QgsSimpleLineSymbolLayer *l = new QgsSimpleLineSymbolLayer( mColor, mWidth, mPenStyle );
l->setWidthUnit( mWidthUnit );
l->setWidthMapUnitScale( mWidthMapUnitScale );
l->setOffsetUnit( mOffsetUnit );
l->setOffsetMapUnitScale( mOffsetMapUnitScale );
l->setCustomDashPatternUnit( mCustomDashPatternUnit );
l->setCustomDashPatternMapUnitScale( mCustomDashPatternMapUnitScale );
l->setOffset( mOffset );
l->setPenJoinStyle( mPenJoinStyle );
l->setPenCapStyle( mPenCapStyle );
l->setUseCustomDashPattern( mUseCustomDashPattern );
l->setCustomDashVector( mCustomDashVector );
l->setDrawInsidePolygon( mDrawInsidePolygon );
copyDataDefinedProperties( l );
copyPaintEffect( l );
return l;
}
void QgsSimpleLineSymbolLayer::toSld( QDomDocument &doc, QDomElement &element, const QgsStringMap &props ) const
{
if ( mPenStyle == Qt::NoPen )
return;
QDomElement symbolizerElem = doc.createElement( QStringLiteral( "se:LineSymbolizer" ) );
if ( !props.value( QStringLiteral( "uom" ), QString() ).isEmpty() )
symbolizerElem.setAttribute( QStringLiteral( "uom" ), props.value( QStringLiteral( "uom" ), QString() ) );
element.appendChild( symbolizerElem );
// <Geometry>
QgsSymbolLayerUtils::createGeometryElement( doc, symbolizerElem, props.value( QStringLiteral( "geom" ), QString() ) );
// <Stroke>
QDomElement strokeElem = doc.createElement( QStringLiteral( "se:Stroke" ) );
symbolizerElem.appendChild( strokeElem );
Qt::PenStyle penStyle = mUseCustomDashPattern ? Qt::CustomDashLine : mPenStyle;
double width = QgsSymbolLayerUtils::rescaleUom( mWidth, mWidthUnit, props );
QVector<qreal> customDashVector = QgsSymbolLayerUtils::rescaleUom( mCustomDashVector, mCustomDashPatternUnit, props );
QgsSymbolLayerUtils::lineToSld( doc, strokeElem, penStyle, mColor, width,
&mPenJoinStyle, &mPenCapStyle, &customDashVector );
// <se:PerpendicularOffset>
if ( !qgsDoubleNear( mOffset, 0.0 ) )
{
QDomElement perpOffsetElem = doc.createElement( QStringLiteral( "se:PerpendicularOffset" ) );
double offset = QgsSymbolLayerUtils::rescaleUom( mOffset, mOffsetUnit, props );
perpOffsetElem.appendChild( doc.createTextNode( qgsDoubleToString( offset ) ) );
symbolizerElem.appendChild( perpOffsetElem );
}
}
QString QgsSimpleLineSymbolLayer::ogrFeatureStyle( double mmScaleFactor, double mapUnitScaleFactor ) const
{
if ( mUseCustomDashPattern )
{
return QgsSymbolLayerUtils::ogrFeatureStylePen( mWidth, mmScaleFactor, mapUnitScaleFactor,
mPen.color(), mPenJoinStyle,
mPenCapStyle, mOffset, &mCustomDashVector );
}
else
{
return QgsSymbolLayerUtils::ogrFeatureStylePen( mWidth, mmScaleFactor, mapUnitScaleFactor, mPen.color(), mPenJoinStyle,
mPenCapStyle, mOffset );
}
}
QgsSymbolLayer *QgsSimpleLineSymbolLayer::createFromSld( QDomElement &element )
{
QgsDebugMsg( "Entered." );
QDomElement strokeElem = element.firstChildElement( QStringLiteral( "Stroke" ) );
if ( strokeElem.isNull() )
return nullptr;
Qt::PenStyle penStyle;
QColor color;
double width;
Qt::PenJoinStyle penJoinStyle;
Qt::PenCapStyle penCapStyle;
QVector<qreal> customDashVector;
if ( !QgsSymbolLayerUtils::lineFromSld( strokeElem, penStyle,
color, width,
&penJoinStyle, &penCapStyle,
&customDashVector ) )
return nullptr;
double offset = 0.0;
QDomElement perpOffsetElem = element.firstChildElement( QStringLiteral( "PerpendicularOffset" ) );
if ( !perpOffsetElem.isNull() )
{
bool ok;
double d = perpOffsetElem.firstChild().nodeValue().toDouble( &ok );
if ( ok )
offset = d;
}
QString uom = element.attribute( QStringLiteral( "uom" ) );
width = QgsSymbolLayerUtils::sizeInPixelsFromSldUom( uom, width );
offset = QgsSymbolLayerUtils::sizeInPixelsFromSldUom( uom, offset );
QgsSimpleLineSymbolLayer *l = new QgsSimpleLineSymbolLayer( color, width, penStyle );
l->setOutputUnit( QgsUnitTypes::RenderUnit::RenderPixels );
l->setOffset( offset );
l->setPenJoinStyle( penJoinStyle );
l->setPenCapStyle( penCapStyle );
l->setUseCustomDashPattern( penStyle == Qt::CustomDashLine );
l->setCustomDashVector( customDashVector );
return l;
}
void QgsSimpleLineSymbolLayer::applyDataDefinedSymbology( QgsSymbolRenderContext &context, QPen &pen, QPen &selPen, double &offset )
{
if ( !dataDefinedProperties().hasActiveProperties() )
return; // shortcut
//data defined properties
bool hasStrokeWidthExpression = false;
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyStrokeWidth ) )
{
context.setOriginalValueVariable( mWidth );
double scaledWidth = context.renderContext().convertToPainterUnits(
mDataDefinedProperties.valueAsDouble( QgsSymbolLayer::PropertyStrokeWidth, context.renderContext().expressionContext(), mWidth ),
mWidthUnit, mWidthMapUnitScale );
pen.setWidthF( scaledWidth );
selPen.setWidthF( scaledWidth );
hasStrokeWidthExpression = true;
}
//color
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyStrokeColor ) )
{
context.setOriginalValueVariable( QgsSymbolLayerUtils::encodeColor( mColor ) );
pen.setColor( mDataDefinedProperties.valueAsColor( QgsSymbolLayer::PropertyStrokeColor, context.renderContext().expressionContext(), mColor ) );
}
//offset
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyOffset ) )
{
context.setOriginalValueVariable( mOffset );
offset = mDataDefinedProperties.valueAsDouble( QgsSymbolLayer::PropertyOffset, context.renderContext().expressionContext(), offset );
}
//dash dot vector
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyCustomDash ) )
{
double scaledWidth = context.renderContext().convertToPainterUnits( mWidth, mWidthUnit, mWidthMapUnitScale );
double dashWidthDiv = mPen.widthF();
if ( hasStrokeWidthExpression )
{
dashWidthDiv = pen.widthF();
scaledWidth = pen.widthF();
}
//fix dash pattern width in Qt 4.8
QStringList versionSplit = QString( qVersion() ).split( '.' );
if ( versionSplit.size() > 1
&& versionSplit.at( 1 ).toInt() >= 8
&& scaledWidth < 1.0 )
{
dashWidthDiv = 1.0;
}
QVector<qreal> dashVector;
QVariant exprVal = mDataDefinedProperties.value( QgsSymbolLayer::PropertyCustomDash, context.renderContext().expressionContext() );
if ( exprVal.isValid() )
{
QStringList dashList = exprVal.toString().split( ';' );
QStringList::const_iterator dashIt = dashList.constBegin();
for ( ; dashIt != dashList.constEnd(); ++dashIt )
{
dashVector.push_back( context.renderContext().convertToPainterUnits( dashIt->toDouble(), mCustomDashPatternUnit, mCustomDashPatternMapUnitScale ) / dashWidthDiv );
}
pen.setDashPattern( dashVector );
}
}
//line style
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyStrokeStyle ) )
{
context.setOriginalValueVariable( QgsSymbolLayerUtils::encodePenStyle( mPenStyle ) );
QVariant exprVal = mDataDefinedProperties.value( QgsSymbolLayer::PropertyStrokeStyle, context.renderContext().expressionContext() );
if ( exprVal.isValid() )
pen.setStyle( QgsSymbolLayerUtils::decodePenStyle( exprVal.toString() ) );
}
//join style
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyJoinStyle ) )
{
context.setOriginalValueVariable( QgsSymbolLayerUtils::encodePenJoinStyle( mPenJoinStyle ) );
QVariant exprVal = mDataDefinedProperties.value( QgsSymbolLayer::PropertyJoinStyle, context.renderContext().expressionContext() );
if ( exprVal.isValid() )
pen.setJoinStyle( QgsSymbolLayerUtils::decodePenJoinStyle( exprVal.toString() ) );
}
//cap style
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyCapStyle ) )
{
context.setOriginalValueVariable( QgsSymbolLayerUtils::encodePenCapStyle( mPenCapStyle ) );
QVariant exprVal = mDataDefinedProperties.value( QgsSymbolLayer::PropertyCapStyle, context.renderContext().expressionContext() );
if ( exprVal.isValid() )
pen.setCapStyle( QgsSymbolLayerUtils::decodePenCapStyle( exprVal.toString() ) );
}
}
double QgsSimpleLineSymbolLayer::estimateMaxBleed( const QgsRenderContext &context ) const
{
if ( mDrawInsidePolygon )
{
//set to clip line to the interior of polygon, so we expect no bleed
return 0;
}
else
{
return context.convertToPainterUnits( ( mWidth / 2.0 ), mWidthUnit, mWidthMapUnitScale ) +
context.convertToPainterUnits( std::fabs( mOffset ), mOffsetUnit, mOffsetMapUnitScale );
}
}
QVector<qreal> QgsSimpleLineSymbolLayer::dxfCustomDashPattern( QgsUnitTypes::RenderUnit &unit ) const
{
unit = mCustomDashPatternUnit;
return mUseCustomDashPattern ? mCustomDashVector : QVector<qreal>();
}
Qt::PenStyle QgsSimpleLineSymbolLayer::dxfPenStyle() const
{
return mPenStyle;
}
double QgsSimpleLineSymbolLayer::dxfWidth( const QgsDxfExport &e, QgsSymbolRenderContext &context ) const
{
double width = mWidth;
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyStrokeWidth ) )
{
context.setOriginalValueVariable( mWidth );
width = mDataDefinedProperties.valueAsDouble( QgsSymbolLayer::PropertyStrokeWidth, context.renderContext().expressionContext(), mWidth );
}
width *= e.mapUnitScaleFactor( e.symbologyScale(), widthUnit(), e.mapUnits(), context.renderContext().mapToPixel().mapUnitsPerPixel() );
if ( mWidthUnit == QgsUnitTypes::RenderMapUnits )
{
e.clipValueToMapUnitScale( width, mWidthMapUnitScale, context.renderContext().scaleFactor() );
}
return width;
}
QColor QgsSimpleLineSymbolLayer::dxfColor( QgsSymbolRenderContext &context ) const
{
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyStrokeColor ) )
{
context.setOriginalValueVariable( QgsSymbolLayerUtils::encodeColor( mColor ) );
return mDataDefinedProperties.valueAsColor( QgsSymbolLayer::PropertyStrokeColor, context.renderContext().expressionContext(), mColor );
}
return mColor;
}
double QgsSimpleLineSymbolLayer::dxfOffset( const QgsDxfExport &e, QgsSymbolRenderContext &context ) const
{
Q_UNUSED( e );
double offset = mOffset;
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyOffset ) )
{
context.setOriginalValueVariable( mOffset );
offset = mDataDefinedProperties.valueAsDouble( QgsSymbolLayer::PropertyOffset, context.renderContext().expressionContext(), mOffset );
}
offset *= e.mapUnitScaleFactor( e.symbologyScale(), offsetUnit(), e.mapUnits(), context.renderContext().mapToPixel().mapUnitsPerPixel() );
if ( mOffsetUnit == QgsUnitTypes::RenderMapUnits )
{
e.clipValueToMapUnitScale( offset, mOffsetMapUnitScale, context.renderContext().scaleFactor() );
}
return -offset; //direction seems to be inverse to symbology offset
}
/////////
///@cond PRIVATE
class MyLine
{
public:
MyLine( QPointF p1, QPointF p2 )
: mVertical( false )
, mIncreasing( false )
, mT( 0.0 )
, mLength( 0.0 )
{
if ( p1 == p2 )
return; // invalid
// tangent and direction
if ( qgsDoubleNear( p1.x(), p2.x() ) )
{
// vertical line - tangent undefined
mVertical = true;
mIncreasing = ( p2.y() > p1.y() );
}
else
{
mVertical = false;
mT = float( p2.y() - p1.y() ) / ( p2.x() - p1.x() );
mIncreasing = ( p2.x() > p1.x() );
}
// length
double x = ( p2.x() - p1.x() );
double y = ( p2.y() - p1.y() );
mLength = std::sqrt( x * x + y * y );
}
// return angle in radians
double angle()
{
double a = ( mVertical ? M_PI_2 : std::atan( mT ) );
if ( !mIncreasing )
a += M_PI;
return a;
}
// return difference for x,y when going along the line with specified interval
QPointF diffForInterval( double interval )
{
if ( mVertical )
return ( mIncreasing ? QPointF( 0, interval ) : QPointF( 0, -interval ) );
double alpha = std::atan( mT );
double dx = std::cos( alpha ) * interval;
double dy = std::sin( alpha ) * interval;
return ( mIncreasing ? QPointF( dx, dy ) : QPointF( -dx, -dy ) );
}
double length() { return mLength; }
protected:
bool mVertical;
bool mIncreasing;
double mT;
double mLength;
};
///@endcond
QgsMarkerLineSymbolLayer::QgsMarkerLineSymbolLayer( bool rotateMarker, double interval )
{
mRotateMarker = rotateMarker;
mInterval = interval;
mIntervalUnit = QgsUnitTypes::RenderMillimeters;
mMarker = nullptr;
mPlacement = Interval;
mOffsetAlongLine = 0;
mOffsetAlongLineUnit = QgsUnitTypes::RenderMillimeters;
setSubSymbol( new QgsMarkerSymbol() );
}
QgsSymbolLayer *QgsMarkerLineSymbolLayer::create( const QgsStringMap &props )
{
bool rotate = DEFAULT_MARKERLINE_ROTATE;
double interval = DEFAULT_MARKERLINE_INTERVAL;
if ( props.contains( QStringLiteral( "interval" ) ) )
interval = props[QStringLiteral( "interval" )].toDouble();
if ( props.contains( QStringLiteral( "rotate" ) ) )
rotate = ( props[QStringLiteral( "rotate" )] == QLatin1String( "1" ) );
QgsMarkerLineSymbolLayer *x = new QgsMarkerLineSymbolLayer( rotate, interval );
if ( props.contains( QStringLiteral( "offset" ) ) )
{
x->setOffset( props[QStringLiteral( "offset" )].toDouble() );
}
if ( props.contains( QStringLiteral( "offset_unit" ) ) )
{
x->setOffsetUnit( QgsUnitTypes::decodeRenderUnit( props[QStringLiteral( "offset_unit" )] ) );
}
if ( props.contains( QStringLiteral( "interval_unit" ) ) )
{
x->setIntervalUnit( QgsUnitTypes::decodeRenderUnit( props[QStringLiteral( "interval_unit" )] ) );
}
if ( props.contains( QStringLiteral( "offset_along_line" ) ) )
{
x->setOffsetAlongLine( props[QStringLiteral( "offset_along_line" )].toDouble() );
}
if ( props.contains( QStringLiteral( "offset_along_line_unit" ) ) )
{
x->setOffsetAlongLineUnit( QgsUnitTypes::decodeRenderUnit( props[QStringLiteral( "offset_along_line_unit" )] ) );
}
if ( props.contains( ( QStringLiteral( "offset_along_line_map_unit_scale" ) ) ) )
{
x->setOffsetAlongLineMapUnitScale( QgsSymbolLayerUtils::decodeMapUnitScale( props[QStringLiteral( "offset_along_line_map_unit_scale" )] ) );
}
if ( props.contains( QStringLiteral( "offset_map_unit_scale" ) ) )
{
x->setOffsetMapUnitScale( QgsSymbolLayerUtils::decodeMapUnitScale( props[QStringLiteral( "offset_map_unit_scale" )] ) );
}
if ( props.contains( QStringLiteral( "interval_map_unit_scale" ) ) )
{
x->setIntervalMapUnitScale( QgsSymbolLayerUtils::decodeMapUnitScale( props[QStringLiteral( "interval_map_unit_scale" )] ) );
}
if ( props.contains( QStringLiteral( "placement" ) ) )
{
if ( props[QStringLiteral( "placement" )] == QLatin1String( "vertex" ) )
x->setPlacement( Vertex );
else if ( props[QStringLiteral( "placement" )] == QLatin1String( "lastvertex" ) )
x->setPlacement( LastVertex );
else if ( props[QStringLiteral( "placement" )] == QLatin1String( "firstvertex" ) )
x->setPlacement( FirstVertex );
else if ( props[QStringLiteral( "placement" )] == QLatin1String( "centralpoint" ) )
x->setPlacement( CentralPoint );
else if ( props[QStringLiteral( "placement" )] == QLatin1String( "curvepoint" ) )
x->setPlacement( CurvePoint );
else
x->setPlacement( Interval );
}
x->restoreOldDataDefinedProperties( props );
return x;
}
QString QgsMarkerLineSymbolLayer::layerType() const
{
return QStringLiteral( "MarkerLine" );
}
void QgsMarkerLineSymbolLayer::setColor( const QColor &color )
{
mMarker->setColor( color );
mColor = color;
}
QColor QgsMarkerLineSymbolLayer::color() const
{
return mMarker ? mMarker->color() : mColor;
}
void QgsMarkerLineSymbolLayer::startRender( QgsSymbolRenderContext &context )
{
mMarker->setOpacity( context.opacity() );
// if being rotated, it gets initialized with every line segment
QgsSymbol::RenderHints hints = nullptr;
if ( mRotateMarker )
hints |= QgsSymbol::DynamicRotation;
mMarker->setRenderHints( hints );
mMarker->startRender( context.renderContext(), context.fields() );
}
void QgsMarkerLineSymbolLayer::stopRender( QgsSymbolRenderContext &context )
{
mMarker->stopRender( context.renderContext() );
}
void QgsMarkerLineSymbolLayer::renderPolyline( const QPolygonF &points, QgsSymbolRenderContext &context )
{
double offset = mOffset;
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyOffset ) )
{
context.setOriginalValueVariable( mOffset );
offset = mDataDefinedProperties.valueAsDouble( QgsSymbolLayer::PropertyOffset, context.renderContext().expressionContext(), mOffset );
}
Placement placement = mPlacement;
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyPlacement ) )
{
QVariant exprVal = mDataDefinedProperties.value( QgsSymbolLayer::PropertyPlacement, context.renderContext().expressionContext() );
if ( exprVal.isValid() )
{
QString placementString = exprVal.toString();
if ( placementString.compare( QLatin1String( "interval" ), Qt::CaseInsensitive ) == 0 )
{
placement = Interval;
}
else if ( placementString.compare( QLatin1String( "vertex" ), Qt::CaseInsensitive ) == 0 )
{
placement = Vertex;
}
else if ( placementString.compare( QLatin1String( "lastvertex" ), Qt::CaseInsensitive ) == 0 )
{
placement = LastVertex;
}
else if ( placementString.compare( QLatin1String( "firstvertex" ), Qt::CaseInsensitive ) == 0 )
{
placement = FirstVertex;
}
else if ( placementString.compare( QLatin1String( "centerpoint" ), Qt::CaseInsensitive ) == 0 )
{
placement = CentralPoint;
}
else if ( placementString.compare( QLatin1String( "curvepoint" ), Qt::CaseInsensitive ) == 0 )
{
placement = CurvePoint;
}
else
{
placement = Interval;
}
}
}
context.renderContext().painter()->save();
if ( qgsDoubleNear( offset, 0.0 ) )
{
if ( placement == Interval )
renderPolylineInterval( points, context );
else if ( placement == CentralPoint )
renderPolylineCentral( points, context );
else
renderPolylineVertex( points, context, placement );
}
else
{
context.renderContext().setGeometry( nullptr ); //always use segmented geometry with offset
QList<QPolygonF> mline = ::offsetLine( points, context.renderContext().convertToPainterUnits( offset, mOffsetUnit, mOffsetMapUnitScale ), context.originalGeometryType() != QgsWkbTypes::UnknownGeometry ? context.originalGeometryType() : QgsWkbTypes::LineGeometry );
for ( int part = 0; part < mline.count(); ++part )
{
const QPolygonF &points2 = mline[ part ];
if ( placement == Interval )
renderPolylineInterval( points2, context );
else if ( placement == CentralPoint )
renderPolylineCentral( points2, context );
else
renderPolylineVertex( points2, context, placement );
}
}
context.renderContext().painter()->restore();
}
void QgsMarkerLineSymbolLayer::renderPolygonStroke( const QPolygonF &points, QList<QPolygonF> *rings, QgsSymbolRenderContext &context )
{
const QgsCurvePolygon *curvePolygon = dynamic_cast<const QgsCurvePolygon *>( context.renderContext().geometry() );
if ( curvePolygon )
{
context.renderContext().setGeometry( curvePolygon->exteriorRing() );
}
renderPolyline( points, context );
if ( rings )
{
mOffset = -mOffset; // invert the offset for rings!
for ( int i = 0; i < rings->size(); ++i )
{
if ( curvePolygon )
{
context.renderContext().setGeometry( curvePolygon->interiorRing( i ) );
}
renderPolyline( rings->at( i ), context );
}
mOffset = -mOffset;
}
}
void QgsMarkerLineSymbolLayer::renderPolylineInterval( const QPolygonF &points, QgsSymbolRenderContext &context )
{
if ( points.isEmpty() )
return;
QPointF lastPt = points[0];
double lengthLeft = 0; // how much is left until next marker
QgsRenderContext &rc = context.renderContext();
double interval = mInterval;
QgsExpressionContextScope *scope = new QgsExpressionContextScope();
context.renderContext().expressionContext().appendScope( scope );
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyInterval ) )
{
context.setOriginalValueVariable( mInterval );
interval = mDataDefinedProperties.valueAsDouble( QgsSymbolLayer::PropertyInterval, context.renderContext().expressionContext(), mInterval );
}
if ( interval <= 0 )
{
interval = 0.1;
}
double offsetAlongLine = mOffsetAlongLine;
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyOffsetAlongLine ) )
{
context.setOriginalValueVariable( mOffsetAlongLine );
offsetAlongLine = mDataDefinedProperties.valueAsDouble( QgsSymbolLayer::PropertyOffsetAlongLine, context.renderContext().expressionContext(), mOffsetAlongLine );
}
double painterUnitInterval = rc.convertToPainterUnits( interval, mIntervalUnit, mIntervalMapUnitScale );
lengthLeft = painterUnitInterval - rc.convertToPainterUnits( offsetAlongLine, mIntervalUnit, mIntervalMapUnitScale );
int pointNum = 0;
for ( int i = 1; i < points.count(); ++i )
{
const QPointF &pt = points[i];
if ( lastPt == pt ) // must not be equal!
continue;
// for each line, find out dx and dy, and length
MyLine l( lastPt, pt );
QPointF diff = l.diffForInterval( painterUnitInterval );
// if there's some length left from previous line
// use only the rest for the first point in new line segment
double c = 1 - lengthLeft / painterUnitInterval;
lengthLeft += l.length();
// rotate marker (if desired)
if ( mRotateMarker )
{
mMarker->setLineAngle( l.angle() * 180 / M_PI );
}
// while we're not at the end of line segment, draw!
while ( lengthLeft > painterUnitInterval )
{
// "c" is 1 for regular point or in interval (0,1] for begin of line segment
lastPt += c * diff;
lengthLeft -= painterUnitInterval;
scope->addVariable( QgsExpressionContextScope::StaticVariable( QgsExpressionContext::EXPR_GEOMETRY_POINT_NUM, ++pointNum, true ) );
mMarker->renderPoint( lastPt, context.feature(), rc, -1, context.selected() );
c = 1; // reset c (if wasn't 1 already)
}
lastPt = pt;
}