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qgsmarkersymbollayer.cpp
3425 lines (2953 loc) · 122 KB
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qgsmarkersymbollayer.cpp
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/***************************************************************************
qgsmarkersymbollayer.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 "qgsmarkersymbollayer.h"
#include "qgssymbollayerutils.h"
#include "qgsdxfexport.h"
#include "qgsdxfpaintdevice.h"
#include "qgsexpression.h"
#include "qgsfontutils.h"
#include "qgsimagecache.h"
#include "qgsimageoperation.h"
#include "qgsrendercontext.h"
#include "qgslogger.h"
#include "qgssvgcache.h"
#include "qgsunittypes.h"
#include <QPainter>
#include <QSvgRenderer>
#include <QFileInfo>
#include <QDir>
#include <QDomDocument>
#include <QDomElement>
#include <cmath>
Q_GUI_EXPORT extern int qt_defaultDpiX();
Q_GUI_EXPORT extern int qt_defaultDpiY();
static void _fixQPictureDPI( QPainter *p )
{
// QPicture makes an assumption that we drawing to it with system DPI.
// Then when being drawn, it scales the painter. The following call
// negates the effect. There is no way of setting QPicture's DPI.
// See QTBUG-20361
p->scale( static_cast< double >( qt_defaultDpiX() ) / p->device()->logicalDpiX(),
static_cast< double >( qt_defaultDpiY() ) / p->device()->logicalDpiY() );
}
//////
//
// QgsSimpleMarkerSymbolLayerBase
//
QList<QgsSimpleMarkerSymbolLayerBase::Shape> QgsSimpleMarkerSymbolLayerBase::availableShapes()
{
QList< Shape > shapes;
shapes << Square
<< Diamond
<< Pentagon
<< Hexagon
<< Triangle
<< EquilateralTriangle
<< Star
<< Arrow
<< Circle
<< Cross
<< CrossFill
<< Cross2
<< Line
<< ArrowHead
<< ArrowHeadFilled
<< SemiCircle
<< ThirdCircle
<< QuarterCircle
<< QuarterSquare
<< HalfSquare
<< DiagonalHalfSquare
<< RightHalfTriangle
<< LeftHalfTriangle;
return shapes;
}
QgsSimpleMarkerSymbolLayerBase::QgsSimpleMarkerSymbolLayerBase( QgsSimpleMarkerSymbolLayerBase::Shape shape, double size, double angle, QgsSymbol::ScaleMethod scaleMethod )
: mShape( shape )
{
mSize = size;
mAngle = angle;
mOffset = QPointF( 0, 0 );
mScaleMethod = scaleMethod;
mSizeUnit = QgsUnitTypes::RenderMillimeters;
mOffsetUnit = QgsUnitTypes::RenderMillimeters;
}
bool QgsSimpleMarkerSymbolLayerBase::shapeIsFilled( QgsSimpleMarkerSymbolLayerBase::Shape shape )
{
switch ( shape )
{
case Square:
case Diamond:
case Pentagon:
case Hexagon:
case Triangle:
case EquilateralTriangle:
case Star:
case Arrow:
case Circle:
case CrossFill:
case ArrowHeadFilled:
case SemiCircle:
case ThirdCircle:
case QuarterCircle:
case QuarterSquare:
case HalfSquare:
case DiagonalHalfSquare:
case RightHalfTriangle:
case LeftHalfTriangle:
return true;
case Cross:
case Cross2:
case Line:
case ArrowHead:
return false;
}
return true;
}
void QgsSimpleMarkerSymbolLayerBase::startRender( QgsSymbolRenderContext &context )
{
bool hasDataDefinedRotation = context.renderHints() & QgsSymbol::DynamicRotation
|| mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyAngle );
bool hasDataDefinedSize = mDataDefinedProperties.isActive( QgsSymbolLayer::PropertySize );
// use either QPolygonF or QPainterPath for drawing
if ( !prepareMarkerShape( mShape ) ) // drawing as a polygon
{
prepareMarkerPath( mShape ); // drawing as a painter path
}
QTransform transform;
// scale the shape (if the size is not going to be modified)
if ( !hasDataDefinedSize )
{
double scaledSize = context.renderContext().convertToPainterUnits( mSize, mSizeUnit, mSizeMapUnitScale );
if ( mSizeUnit == QgsUnitTypes::RenderMetersInMapUnits && context.renderContext().flags() & QgsRenderContext::RenderSymbolPreview )
{
// rendering for symbol previews -- an size in meters in map units can't be calculated, so treat the size as millimeters
// and clamp it to a reasonable range. It's the best we can do in this situation!
scaledSize = std::min( std::max( context.renderContext().convertToPainterUnits( mSize, QgsUnitTypes::RenderMillimeters ), 3.0 ), 100.0 );
}
double half = scaledSize / 2.0;
transform.scale( half, half );
}
// rotate if the rotation is not going to be changed during the rendering
if ( !hasDataDefinedRotation && !qgsDoubleNear( mAngle, 0.0 ) )
{
transform.rotate( mAngle );
}
if ( !mPolygon.isEmpty() )
mPolygon = transform.map( mPolygon );
else
mPath = transform.map( mPath );
QgsMarkerSymbolLayer::startRender( context );
}
void QgsSimpleMarkerSymbolLayerBase::stopRender( QgsSymbolRenderContext &context )
{
Q_UNUSED( context )
}
void QgsSimpleMarkerSymbolLayerBase::renderPoint( QPointF point, QgsSymbolRenderContext &context )
{
//making changes here? Don't forget to also update ::bounds if the changes affect the bounding box
//of the rendered point!
QPainter *p = context.renderContext().painter();
if ( !p )
{
return;
}
bool hasDataDefinedSize = false;
double scaledSize = calculateSize( context, hasDataDefinedSize );
bool hasDataDefinedRotation = false;
QPointF offset;
double angle = 0;
calculateOffsetAndRotation( context, scaledSize, hasDataDefinedRotation, offset, angle );
//data defined shape?
bool createdNewPath = false;
bool ok = true;
Shape symbol = mShape;
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyName ) )
{
context.setOriginalValueVariable( encodeShape( symbol ) );
QVariant exprVal = mDataDefinedProperties.value( QgsSymbolLayer::PropertyName, context.renderContext().expressionContext() );
if ( exprVal.isValid() )
{
Shape decoded = decodeShape( exprVal.toString(), &ok );
if ( ok )
{
symbol = decoded;
if ( !prepareMarkerShape( symbol ) ) // drawing as a polygon
{
prepareMarkerPath( symbol ); // drawing as a painter path
}
createdNewPath = true;
}
}
else
{
symbol = mShape;
}
}
QTransform transform;
// move to the desired position
transform.translate( point.x() + offset.x(), point.y() + offset.y() );
// resize if necessary
if ( hasDataDefinedSize || createdNewPath )
{
double s = context.renderContext().convertToPainterUnits( scaledSize, mSizeUnit, mSizeMapUnitScale );
if ( mSizeUnit == QgsUnitTypes::RenderMetersInMapUnits && context.renderContext().flags() & QgsRenderContext::RenderSymbolPreview )
{
// rendering for symbol previews -- a size in meters in map units can't be calculated, so treat the size as millimeters
// and clamp it to a reasonable range. It's the best we can do in this situation!
s = std::min( std::max( context.renderContext().convertToPainterUnits( mSize, QgsUnitTypes::RenderMillimeters ), 3.0 ), 100.0 );
}
double half = s / 2.0;
transform.scale( half, half );
}
if ( !qgsDoubleNear( angle, 0.0 ) && ( hasDataDefinedRotation || createdNewPath ) )
transform.rotate( angle );
//need to pass: symbol, polygon, path
QPolygonF polygon;
QPainterPath path;
if ( !mPolygon.isEmpty() )
{
polygon = transform.map( mPolygon );
}
else
{
path = transform.map( mPath );
}
draw( context, symbol, polygon, path );
}
QRectF QgsSimpleMarkerSymbolLayerBase::bounds( QPointF point, QgsSymbolRenderContext &context )
{
bool hasDataDefinedSize = false;
double scaledSize = calculateSize( context, hasDataDefinedSize );
bool hasDataDefinedRotation = false;
QPointF offset;
double angle = 0;
calculateOffsetAndRotation( context, scaledSize, hasDataDefinedRotation, offset, angle );
scaledSize = context.renderContext().convertToPainterUnits( scaledSize, mSizeUnit, mSizeMapUnitScale );
QTransform transform;
// move to the desired position
transform.translate( point.x() + offset.x(), point.y() + offset.y() );
if ( !qgsDoubleNear( angle, 0.0 ) )
transform.rotate( angle );
return transform.mapRect( QRectF( -scaledSize / 2.0,
-scaledSize / 2.0,
scaledSize,
scaledSize ) );
}
QgsSimpleMarkerSymbolLayerBase::Shape QgsSimpleMarkerSymbolLayerBase::decodeShape( const QString &name, bool *ok )
{
if ( ok )
*ok = true;
QString cleaned = name.toLower().trimmed();
if ( cleaned == QLatin1String( "square" ) || cleaned == QLatin1String( "rectangle" ) )
return Square;
else if ( cleaned == QLatin1String( "diamond" ) )
return Diamond;
else if ( cleaned == QLatin1String( "pentagon" ) )
return Pentagon;
else if ( cleaned == QLatin1String( "hexagon" ) )
return Hexagon;
else if ( cleaned == QLatin1String( "triangle" ) )
return Triangle;
else if ( cleaned == QLatin1String( "equilateral_triangle" ) )
return EquilateralTriangle;
else if ( cleaned == QLatin1String( "star" ) || cleaned == QLatin1String( "regular_star" ) )
return Star;
else if ( cleaned == QLatin1String( "arrow" ) )
return Arrow;
else if ( cleaned == QLatin1String( "circle" ) )
return Circle;
else if ( cleaned == QLatin1String( "cross" ) )
return Cross;
else if ( cleaned == QLatin1String( "cross_fill" ) )
return CrossFill;
else if ( cleaned == QLatin1String( "cross2" ) || cleaned == QLatin1String( "x" ) )
return Cross2;
else if ( cleaned == QLatin1String( "line" ) )
return Line;
else if ( cleaned == QLatin1String( "arrowhead" ) )
return ArrowHead;
else if ( cleaned == QLatin1String( "filled_arrowhead" ) )
return ArrowHeadFilled;
else if ( cleaned == QLatin1String( "semi_circle" ) )
return SemiCircle;
else if ( cleaned == QLatin1String( "third_circle" ) )
return ThirdCircle;
else if ( cleaned == QLatin1String( "quarter_circle" ) )
return QuarterCircle;
else if ( cleaned == QLatin1String( "quarter_square" ) )
return QuarterSquare;
else if ( cleaned == QLatin1String( "half_square" ) )
return HalfSquare;
else if ( cleaned == QLatin1String( "diagonal_half_square" ) )
return DiagonalHalfSquare;
else if ( cleaned == QLatin1String( "right_half_triangle" ) )
return RightHalfTriangle;
else if ( cleaned == QLatin1String( "left_half_triangle" ) )
return LeftHalfTriangle;
if ( ok )
*ok = false;
return Circle;
}
QString QgsSimpleMarkerSymbolLayerBase::encodeShape( QgsSimpleMarkerSymbolLayerBase::Shape shape )
{
switch ( shape )
{
case Square:
return QStringLiteral( "square" );
case QuarterSquare:
return QStringLiteral( "quarter_square" );
case HalfSquare:
return QStringLiteral( "half_square" );
case DiagonalHalfSquare:
return QStringLiteral( "diagonal_half_square" );
case Diamond:
return QStringLiteral( "diamond" );
case Pentagon:
return QStringLiteral( "pentagon" );
case Hexagon:
return QStringLiteral( "hexagon" );
case Triangle:
return QStringLiteral( "triangle" );
case EquilateralTriangle:
return QStringLiteral( "equilateral_triangle" );
case LeftHalfTriangle:
return QStringLiteral( "left_half_triangle" );
case RightHalfTriangle:
return QStringLiteral( "right_half_triangle" );
case Star:
return QStringLiteral( "star" );
case Arrow:
return QStringLiteral( "arrow" );
case ArrowHeadFilled:
return QStringLiteral( "filled_arrowhead" );
case CrossFill:
return QStringLiteral( "cross_fill" );
case Circle:
return QStringLiteral( "circle" );
case Cross:
return QStringLiteral( "cross" );
case Cross2:
return QStringLiteral( "cross2" );
case Line:
return QStringLiteral( "line" );
case ArrowHead:
return QStringLiteral( "arrowhead" );
case SemiCircle:
return QStringLiteral( "semi_circle" );
case ThirdCircle:
return QStringLiteral( "third_circle" );
case QuarterCircle:
return QStringLiteral( "quarter_circle" );
}
return QString();
}
bool QgsSimpleMarkerSymbolLayerBase::prepareMarkerShape( QgsSimpleMarkerSymbolLayerBase::Shape shape )
{
return shapeToPolygon( shape, mPolygon );
}
bool QgsSimpleMarkerSymbolLayerBase::shapeToPolygon( QgsSimpleMarkerSymbolLayerBase::Shape shape, QPolygonF &polygon ) const
{
polygon.clear();
switch ( shape )
{
case Square:
polygon = QPolygonF( QRectF( QPointF( -1, -1 ), QPointF( 1, 1 ) ) );
return true;
case QuarterSquare:
polygon = QPolygonF( QRectF( QPointF( -1, -1 ), QPointF( 0, 0 ) ) );
return true;
case HalfSquare:
polygon = QPolygonF( QRectF( QPointF( -1, -1 ), QPointF( 0, 1 ) ) );
return true;
case DiagonalHalfSquare:
polygon << QPointF( -1, -1 ) << QPointF( 1, 1 ) << QPointF( -1, 1 ) << QPointF( -1, -1 );
return true;
case Diamond:
polygon << QPointF( -1, 0 ) << QPointF( 0, 1 )
<< QPointF( 1, 0 ) << QPointF( 0, -1 ) << QPointF( -1, 0 );
return true;
case Pentagon:
/* angular-representation of hardcoded values used
polygon << QPointF( std::sin( DEG2RAD( 288.0 ) ), - std::cos( DEG2RAD( 288.0 ) ) )
<< QPointF( std::sin( DEG2RAD( 216.0 ) ), - std::cos( DEG2RAD( 216.0 ) ) )
<< QPointF( std::sin( DEG2RAD( 144.0 ) ), - std::cos( DEG2RAD( 144.0 ) ) )
<< QPointF( std::sin( DEG2RAD( 72.0 ) ), - std::cos( DEG2RAD( 72.0 ) ) )
<< QPointF( 0, -1 ); */
polygon << QPointF( -0.9511, -0.3090 )
<< QPointF( -0.5878, 0.8090 )
<< QPointF( 0.5878, 0.8090 )
<< QPointF( 0.9511, -0.3090 )
<< QPointF( 0, -1 )
<< QPointF( -0.9511, -0.3090 );
return true;
case Hexagon:
/* angular-representation of hardcoded values used
polygon << QPointF( std::sin( DEG2RAD( 300.0 ) ), - std::cos( DEG2RAD( 300.0 ) ) )
<< QPointF( std::sin( DEG2RAD( 240.0 ) ), - std::cos( DEG2RAD( 240.0 ) ) )
<< QPointF( std::sin( DEG2RAD( 180.0 ) ), - std::cos( DEG2RAD( 180.0 ) ) )
<< QPointF( std::sin( DEG2RAD( 120.0 ) ), - std::cos( DEG2RAD( 120.0 ) ) )
<< QPointF( std::sin( DEG2RAD( 60.0 ) ), - std::cos( DEG2RAD( 60.0 ) ) )
<< QPointF( 0, -1 ); */
polygon << QPointF( -0.8660, -0.5 )
<< QPointF( -0.8660, 0.5 )
<< QPointF( 0, 1 )
<< QPointF( 0.8660, 0.5 )
<< QPointF( 0.8660, -0.5 )
<< QPointF( 0, -1 )
<< QPointF( -0.8660, -0.5 );
return true;
case Triangle:
polygon << QPointF( -1, 1 ) << QPointF( 1, 1 ) << QPointF( 0, -1 ) << QPointF( -1, 1 );
return true;
case EquilateralTriangle:
/* angular-representation of hardcoded values used
polygon << QPointF( std::sin( DEG2RAD( 240.0 ) ), - std::cos( DEG2RAD( 240.0 ) ) )
<< QPointF( std::sin( DEG2RAD( 120.0 ) ), - std::cos( DEG2RAD( 120.0 ) ) )
<< QPointF( 0, -1 ); */
polygon << QPointF( -0.8660, 0.5 )
<< QPointF( 0.8660, 0.5 )
<< QPointF( 0, -1 )
<< QPointF( -0.8660, 0.5 );
return true;
case LeftHalfTriangle:
polygon << QPointF( 0, 1 ) << QPointF( 1, 1 ) << QPointF( 0, -1 ) << QPointF( 0, 1 );
return true;
case RightHalfTriangle:
polygon << QPointF( -1, 1 ) << QPointF( 0, 1 ) << QPointF( 0, -1 ) << QPointF( -1, 1 );
return true;
case Star:
{
double inner_r = std::cos( DEG2RAD( 72.0 ) ) / std::cos( DEG2RAD( 36.0 ) );
polygon << QPointF( inner_r * std::sin( DEG2RAD( 324.0 ) ), - inner_r * std::cos( DEG2RAD( 324.0 ) ) ) // 324
<< QPointF( std::sin( DEG2RAD( 288.0 ) ), - std::cos( DEG2RAD( 288 ) ) ) // 288
<< QPointF( inner_r * std::sin( DEG2RAD( 252.0 ) ), - inner_r * std::cos( DEG2RAD( 252.0 ) ) ) // 252
<< QPointF( std::sin( DEG2RAD( 216.0 ) ), - std::cos( DEG2RAD( 216.0 ) ) ) // 216
<< QPointF( 0, inner_r ) // 180
<< QPointF( std::sin( DEG2RAD( 144.0 ) ), - std::cos( DEG2RAD( 144.0 ) ) ) // 144
<< QPointF( inner_r * std::sin( DEG2RAD( 108.0 ) ), - inner_r * std::cos( DEG2RAD( 108.0 ) ) ) // 108
<< QPointF( std::sin( DEG2RAD( 72.0 ) ), - std::cos( DEG2RAD( 72.0 ) ) ) // 72
<< QPointF( inner_r * std::sin( DEG2RAD( 36.0 ) ), - inner_r * std::cos( DEG2RAD( 36.0 ) ) ) // 36
<< QPointF( 0, -1 )
<< QPointF( inner_r * std::sin( DEG2RAD( 324.0 ) ), - inner_r * std::cos( DEG2RAD( 324.0 ) ) ); // 324; // 0
return true;
}
case Arrow:
polygon << QPointF( 0, -1 )
<< QPointF( 0.5, -0.5 )
<< QPointF( 0.25, -0.5 )
<< QPointF( 0.25, 1 )
<< QPointF( -0.25, 1 )
<< QPointF( -0.25, -0.5 )
<< QPointF( -0.5, -0.5 )
<< QPointF( 0, -1 );
return true;
case ArrowHeadFilled:
polygon << QPointF( 0, 0 ) << QPointF( -1, 1 ) << QPointF( -1, -1 ) << QPointF( 0, 0 );
return true;
case CrossFill:
polygon << QPointF( -1, -0.2 )
<< QPointF( -1, -0.2 )
<< QPointF( -1, 0.2 )
<< QPointF( -0.2, 0.2 )
<< QPointF( -0.2, 1 )
<< QPointF( 0.2, 1 )
<< QPointF( 0.2, 0.2 )
<< QPointF( 1, 0.2 )
<< QPointF( 1, -0.2 )
<< QPointF( 0.2, -0.2 )
<< QPointF( 0.2, -1 )
<< QPointF( -0.2, -1 )
<< QPointF( -0.2, -0.2 )
<< QPointF( -1, -0.2 );
return true;
case Circle:
case Cross:
case Cross2:
case Line:
case ArrowHead:
case SemiCircle:
case ThirdCircle:
case QuarterCircle:
return false;
}
return false;
}
bool QgsSimpleMarkerSymbolLayerBase::prepareMarkerPath( QgsSimpleMarkerSymbolLayerBase::Shape symbol )
{
mPath = QPainterPath();
switch ( symbol )
{
case Circle:
mPath.addEllipse( QRectF( -1, -1, 2, 2 ) ); // x,y,w,h
return true;
case SemiCircle:
mPath.arcTo( -1, -1, 2, 2, 0, 180 );
mPath.lineTo( 0, 0 );
return true;
case ThirdCircle:
mPath.arcTo( -1, -1, 2, 2, 90, 120 );
mPath.lineTo( 0, 0 );
return true;
case QuarterCircle:
mPath.arcTo( -1, -1, 2, 2, 90, 90 );
mPath.lineTo( 0, 0 );
return true;
case Cross:
mPath.moveTo( -1, 0 );
mPath.lineTo( 1, 0 ); // horizontal
mPath.moveTo( 0, -1 );
mPath.lineTo( 0, 1 ); // vertical
return true;
case Cross2:
mPath.moveTo( -1, -1 );
mPath.lineTo( 1, 1 );
mPath.moveTo( 1, -1 );
mPath.lineTo( -1, 1 );
return true;
case Line:
mPath.moveTo( 0, -1 );
mPath.lineTo( 0, 1 ); // vertical line
return true;
case ArrowHead:
mPath.moveTo( -1, -1 );
mPath.lineTo( 0, 0 );
mPath.lineTo( -1, 1 );
return true;
case Square:
case QuarterSquare:
case HalfSquare:
case DiagonalHalfSquare:
case Diamond:
case Pentagon:
case Hexagon:
case Triangle:
case EquilateralTriangle:
case LeftHalfTriangle:
case RightHalfTriangle:
case Star:
case Arrow:
case ArrowHeadFilled:
case CrossFill:
return false;
}
return false;
}
double QgsSimpleMarkerSymbolLayerBase::calculateSize( QgsSymbolRenderContext &context, bool &hasDataDefinedSize ) const
{
double scaledSize = mSize;
hasDataDefinedSize = mDataDefinedProperties.isActive( QgsSymbolLayer::PropertySize );
bool ok = true;
if ( hasDataDefinedSize )
{
context.setOriginalValueVariable( mSize );
scaledSize = mDataDefinedProperties.valueAsDouble( QgsSymbolLayer::PropertySize, context.renderContext().expressionContext(),
mSize, &ok );
}
if ( hasDataDefinedSize && ok )
{
switch ( mScaleMethod )
{
case QgsSymbol::ScaleArea:
scaledSize = std::sqrt( scaledSize );
break;
case QgsSymbol::ScaleDiameter:
break;
}
}
return scaledSize;
}
void QgsSimpleMarkerSymbolLayerBase::calculateOffsetAndRotation( QgsSymbolRenderContext &context, double scaledSize, bool &hasDataDefinedRotation, QPointF &offset, double &angle ) const
{
//offset
double offsetX = 0;
double offsetY = 0;
markerOffset( context, scaledSize, scaledSize, offsetX, offsetY );
offset = QPointF( offsetX, offsetY );
hasDataDefinedRotation = false;
//angle
bool ok = true;
angle = mAngle + mLineAngle;
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyAngle ) )
{
context.setOriginalValueVariable( angle );
angle = mDataDefinedProperties.valueAsDouble( QgsSymbolLayer::PropertyAngle, context.renderContext().expressionContext(), mAngle, &ok ) + mLineAngle;
// If the expression evaluation was not successful, fallback to static value
if ( !ok )
angle = mAngle + mLineAngle;
hasDataDefinedRotation = true;
}
hasDataDefinedRotation = context.renderHints() & QgsSymbol::DynamicRotation || hasDataDefinedRotation;
if ( hasDataDefinedRotation )
{
// For non-point markers, "dataDefinedRotation" means following the
// shape (shape-data defined). For them, "field-data defined" does
// not work at all. TODO: if "field-data defined" ever gets implemented
// we'll need a way to distinguish here between the two, possibly
// using another flag in renderHints()
const QgsFeature *f = context.feature();
if ( f )
{
if ( f->hasGeometry() && f->geometry().type() == QgsWkbTypes::PointGeometry )
{
const QgsMapToPixel &m2p = context.renderContext().mapToPixel();
angle += m2p.mapRotation();
}
}
}
if ( angle )
offset = _rotatedOffset( offset, angle );
}
//
// QgsSimpleMarkerSymbolLayer
//
QgsSimpleMarkerSymbolLayer::QgsSimpleMarkerSymbolLayer( QgsSimpleMarkerSymbolLayerBase::Shape shape, double size, double angle, QgsSymbol::ScaleMethod scaleMethod, const QColor &color, const QColor &strokeColor, Qt::PenJoinStyle penJoinStyle )
: QgsSimpleMarkerSymbolLayerBase( shape, size, angle, scaleMethod )
, mStrokeColor( strokeColor )
, mPenJoinStyle( penJoinStyle )
{
mColor = color;
}
QgsSymbolLayer *QgsSimpleMarkerSymbolLayer::create( const QgsStringMap &props )
{
Shape shape = Circle;
QColor color = DEFAULT_SIMPLEMARKER_COLOR;
QColor strokeColor = DEFAULT_SIMPLEMARKER_BORDERCOLOR;
Qt::PenJoinStyle penJoinStyle = DEFAULT_SIMPLEMARKER_JOINSTYLE;
double size = DEFAULT_SIMPLEMARKER_SIZE;
double angle = DEFAULT_SIMPLEMARKER_ANGLE;
QgsSymbol::ScaleMethod scaleMethod = DEFAULT_SCALE_METHOD;
if ( props.contains( QStringLiteral( "name" ) ) )
{
shape = decodeShape( props[QStringLiteral( "name" )] );
}
if ( props.contains( QStringLiteral( "color" ) ) )
color = QgsSymbolLayerUtils::decodeColor( props[QStringLiteral( "color" )] );
if ( props.contains( QStringLiteral( "color_border" ) ) )
{
//pre 2.5 projects use "color_border"
strokeColor = QgsSymbolLayerUtils::decodeColor( props[QStringLiteral( "color_border" )] );
}
else if ( props.contains( QStringLiteral( "outline_color" ) ) )
{
strokeColor = QgsSymbolLayerUtils::decodeColor( props[QStringLiteral( "outline_color" )] );
}
else if ( props.contains( QStringLiteral( "line_color" ) ) )
{
strokeColor = QgsSymbolLayerUtils::decodeColor( props[QStringLiteral( "line_color" )] );
}
if ( props.contains( QStringLiteral( "joinstyle" ) ) )
{
penJoinStyle = QgsSymbolLayerUtils::decodePenJoinStyle( props[QStringLiteral( "joinstyle" )] );
}
if ( props.contains( QStringLiteral( "size" ) ) )
size = props[QStringLiteral( "size" )].toDouble();
if ( props.contains( QStringLiteral( "angle" ) ) )
angle = props[QStringLiteral( "angle" )].toDouble();
if ( props.contains( QStringLiteral( "scale_method" ) ) )
scaleMethod = QgsSymbolLayerUtils::decodeScaleMethod( props[QStringLiteral( "scale_method" )] );
QgsSimpleMarkerSymbolLayer *m = new QgsSimpleMarkerSymbolLayer( shape, size, angle, scaleMethod, color, strokeColor, penJoinStyle );
if ( props.contains( QStringLiteral( "offset" ) ) )
m->setOffset( QgsSymbolLayerUtils::decodePoint( props[QStringLiteral( "offset" )] ) );
if ( props.contains( QStringLiteral( "offset_unit" ) ) )
m->setOffsetUnit( QgsUnitTypes::decodeRenderUnit( props[QStringLiteral( "offset_unit" )] ) );
if ( props.contains( QStringLiteral( "offset_map_unit_scale" ) ) )
m->setOffsetMapUnitScale( QgsSymbolLayerUtils::decodeMapUnitScale( props[QStringLiteral( "offset_map_unit_scale" )] ) );
if ( props.contains( QStringLiteral( "size_unit" ) ) )
m->setSizeUnit( QgsUnitTypes::decodeRenderUnit( props[QStringLiteral( "size_unit" )] ) );
if ( props.contains( QStringLiteral( "size_map_unit_scale" ) ) )
m->setSizeMapUnitScale( QgsSymbolLayerUtils::decodeMapUnitScale( props[QStringLiteral( "size_map_unit_scale" )] ) );
if ( props.contains( QStringLiteral( "outline_style" ) ) )
{
m->setStrokeStyle( QgsSymbolLayerUtils::decodePenStyle( props[QStringLiteral( "outline_style" )] ) );
}
else if ( props.contains( QStringLiteral( "line_style" ) ) )
{
m->setStrokeStyle( QgsSymbolLayerUtils::decodePenStyle( props[QStringLiteral( "line_style" )] ) );
}
if ( props.contains( QStringLiteral( "outline_width" ) ) )
{
m->setStrokeWidth( props[QStringLiteral( "outline_width" )].toDouble() );
}
else if ( props.contains( QStringLiteral( "line_width" ) ) )
{
m->setStrokeWidth( props[QStringLiteral( "line_width" )].toDouble() );
}
if ( props.contains( QStringLiteral( "outline_width_unit" ) ) )
{
m->setStrokeWidthUnit( QgsUnitTypes::decodeRenderUnit( props[QStringLiteral( "outline_width_unit" )] ) );
}
if ( props.contains( QStringLiteral( "line_width_unit" ) ) )
{
m->setStrokeWidthUnit( QgsUnitTypes::decodeRenderUnit( props[QStringLiteral( "line_width_unit" )] ) );
}
if ( props.contains( QStringLiteral( "outline_width_map_unit_scale" ) ) )
{
m->setStrokeWidthMapUnitScale( QgsSymbolLayerUtils::decodeMapUnitScale( props[QStringLiteral( "outline_width_map_unit_scale" )] ) );
}
if ( props.contains( QStringLiteral( "horizontal_anchor_point" ) ) )
{
m->setHorizontalAnchorPoint( QgsMarkerSymbolLayer::HorizontalAnchorPoint( props[ QStringLiteral( "horizontal_anchor_point" )].toInt() ) );
}
if ( props.contains( QStringLiteral( "vertical_anchor_point" ) ) )
{
m->setVerticalAnchorPoint( QgsMarkerSymbolLayer::VerticalAnchorPoint( props[ QStringLiteral( "vertical_anchor_point" )].toInt() ) );
}
m->restoreOldDataDefinedProperties( props );
return m;
}
QString QgsSimpleMarkerSymbolLayer::layerType() const
{
return QStringLiteral( "SimpleMarker" );
}
void QgsSimpleMarkerSymbolLayer::startRender( QgsSymbolRenderContext &context )
{
QgsSimpleMarkerSymbolLayerBase::startRender( context );
QColor brushColor = mColor;
QColor penColor = mStrokeColor;
brushColor.setAlphaF( mColor.alphaF() * context.opacity() );
penColor.setAlphaF( mStrokeColor.alphaF() * context.opacity() );
mBrush = QBrush( brushColor );
mPen = QPen( penColor );
mPen.setStyle( mStrokeStyle );
mPen.setJoinStyle( mPenJoinStyle );
mPen.setWidthF( context.renderContext().convertToPainterUnits( mStrokeWidth, mStrokeWidthUnit, mStrokeWidthMapUnitScale ) );
QColor selBrushColor = context.renderContext().selectionColor();
QColor selPenColor = selBrushColor == mColor ? selBrushColor : mStrokeColor;
if ( context.opacity() < 1 && !SELECTION_IS_OPAQUE )
{
selBrushColor.setAlphaF( context.opacity() );
selPenColor.setAlphaF( context.opacity() );
}
mSelBrush = QBrush( selBrushColor );
mSelPen = QPen( selPenColor );
mSelPen.setStyle( mStrokeStyle );
mSelPen.setWidthF( context.renderContext().convertToPainterUnits( mStrokeWidth, mStrokeWidthUnit, mStrokeWidthMapUnitScale ) );
bool hasDataDefinedRotation = context.renderHints() & QgsSymbol::DynamicRotation || mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyAngle );
bool hasDataDefinedSize = mDataDefinedProperties.isActive( QgsSymbolLayer::PropertySize );
// use caching only when:
// - size, rotation, shape, color, stroke color is not data-defined
// - drawing to screen (not printer)
mUsingCache = !hasDataDefinedRotation && !hasDataDefinedSize && !context.renderContext().forceVectorOutput()
&& !mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyName ) && !mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyFillColor ) && !mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyStrokeColor )
&& !mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyStrokeWidth ) && !mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyStrokeStyle )
&& !mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyJoinStyle );
if ( !shapeIsFilled( mShape ) )
{
// some markers can't be drawn as a polygon (circle, cross)
// For these set the selected stroke color to the selected color
mSelPen.setColor( selBrushColor );
}
if ( mUsingCache )
{
if ( !prepareCache( context ) )
{
mUsingCache = false;
}
}
else
{
mCache = QImage();
mSelCache = QImage();
}
}
bool QgsSimpleMarkerSymbolLayer::prepareCache( QgsSymbolRenderContext &context )
{
double scaledSize = context.renderContext().convertToPainterUnits( mSize, mSizeUnit, mSizeMapUnitScale );
if ( mSizeUnit == QgsUnitTypes::RenderMetersInMapUnits && context.renderContext().flags() & QgsRenderContext::RenderSymbolPreview )
{
// rendering for symbol previews -- a size in meters in map units can't be calculated, so treat the size as millimeters
// and clamp it to a reasonable range. It's the best we can do in this situation!
scaledSize = std::min( std::max( context.renderContext().convertToPainterUnits( mSize, QgsUnitTypes::RenderMillimeters ), 3.0 ), 100.0 );
}
// take into account angle (which is not data-defined otherwise cache wouldn't be used)
if ( !qgsDoubleNear( mAngle, 0.0 ) )
{
scaledSize = ( std::abs( std::sin( mAngle * M_PI / 180 ) ) + std::abs( std::cos( mAngle * M_PI / 180 ) ) ) * scaledSize;
}
// calculate necessary image size for the cache
double pw = static_cast< int >( std::round( ( ( qgsDoubleNear( mPen.widthF(), 0.0 ) ? 1 : mPen.widthF() * 4 ) + 1 ) ) ) / 2 * 2; // make even (round up); handle cosmetic pen
int imageSize = ( static_cast< int >( scaledSize ) + pw ) / 2 * 2 + 1; // make image width, height odd; account for pen width
double center = imageSize / 2.0;
if ( imageSize > MAXIMUM_CACHE_WIDTH )
{
return false;
}
mCache = QImage( QSize( imageSize, imageSize ), QImage::Format_ARGB32_Premultiplied );
mCache.fill( 0 );
bool needsBrush = shapeIsFilled( mShape );
QPainter p;
p.begin( &mCache );
p.setRenderHint( QPainter::Antialiasing );
p.setBrush( needsBrush ? mBrush : Qt::NoBrush );
p.setPen( mPen );
p.translate( QPointF( center, center ) );
drawMarker( &p, context );
p.end();
// Construct the selected version of the Cache
QColor selColor = context.renderContext().selectionColor();
mSelCache = QImage( QSize( imageSize, imageSize ), QImage::Format_ARGB32_Premultiplied );
mSelCache.fill( 0 );
p.begin( &mSelCache );
p.setRenderHint( QPainter::Antialiasing );
p.setBrush( needsBrush ? mSelBrush : Qt::NoBrush );
p.setPen( mSelPen );
p.translate( QPointF( center, center ) );
drawMarker( &p, context );
p.end();
// Check that the selected version is different. If not, then re-render,
// filling the background with the selection color and using the normal
// colors for the symbol .. could be ugly!
if ( mSelCache == mCache )
{
p.begin( &mSelCache );
p.setRenderHint( QPainter::Antialiasing );
p.fillRect( 0, 0, imageSize, imageSize, selColor );
p.setBrush( needsBrush ? mBrush : Qt::NoBrush );
p.setPen( mPen );
p.translate( QPointF( center, center ) );
drawMarker( &p, context );
p.end();
}
return true;
}
void QgsSimpleMarkerSymbolLayer::draw( QgsSymbolRenderContext &context, QgsSimpleMarkerSymbolLayerBase::Shape shape, const QPolygonF &polygon, const QPainterPath &path )
{
//making changes here? Don't forget to also update ::bounds if the changes affect the bounding box
//of the rendered point!
QPainter *p = context.renderContext().painter();
if ( !p )
{
return;
}
bool ok = true;
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyFillColor ) )
{
context.setOriginalValueVariable( QgsSymbolLayerUtils::encodeColor( mColor ) );
QColor c = mDataDefinedProperties.valueAsColor( QgsSymbolLayer::PropertyFillColor, context.renderContext().expressionContext(), mColor, &ok );
if ( ok )
mBrush.setColor( c );
}
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyStrokeColor ) )
{
context.setOriginalValueVariable( QgsSymbolLayerUtils::encodeColor( mStrokeColor ) );
QColor c = mDataDefinedProperties.valueAsColor( QgsSymbolLayer::PropertyStrokeColor, context.renderContext().expressionContext(), mColor, &ok );
if ( ok )
{
mPen.setColor( c );
mSelPen.setColor( c );
}
}
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyStrokeWidth ) )
{
context.setOriginalValueVariable( mStrokeWidth );
double strokeWidth = mDataDefinedProperties.valueAsDouble( QgsSymbolLayer::PropertyStrokeWidth, context.renderContext().expressionContext(), 0, &ok );
if ( ok )
{
mPen.setWidthF( context.renderContext().convertToPainterUnits( strokeWidth, mStrokeWidthUnit, mStrokeWidthMapUnitScale ) );
mSelPen.setWidthF( context.renderContext().convertToPainterUnits( strokeWidth, mStrokeWidthUnit, mStrokeWidthMapUnitScale ) );
}
}
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyStrokeStyle ) )
{
context.setOriginalValueVariable( QgsSymbolLayerUtils::encodePenStyle( mStrokeStyle ) );
QString strokeStyle = mDataDefinedProperties.valueAsString( QgsSymbolLayer::PropertyStrokeStyle, context.renderContext().expressionContext(), QString(), &ok );
if ( ok )
{
mPen.setStyle( QgsSymbolLayerUtils::decodePenStyle( strokeStyle ) );
mSelPen.setStyle( QgsSymbolLayerUtils::decodePenStyle( strokeStyle ) );
}
}
if ( mDataDefinedProperties.isActive( QgsSymbolLayer::PropertyJoinStyle ) )
{