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https://github.com/qgis/QGIS.git
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aed6c735a6
Why? - no benefits to QScopedPointer over std::unique_ptr - unlike QScopedPointer, std::unique_ptr has no overhead over regular pointers - using standard language features makes it more likely that compilers can optimise this use and static analysers can correctly handle code using unique_ptrs - QScopedPointer has an (IMO) uncertain future (given that Qt is dropping features which have become part of the c++ standard). Better to port now before wider use of QScopedPointer in the codebase!
137 lines
4.5 KiB
C++
137 lines
4.5 KiB
C++
/***************************************************************************
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qgscomposerpolyline.cpp
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begin : March 2016
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copyright : (C) 2016 Paul Blottiere, Oslandia
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email : paul dot blottiere at oslandia dot com
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include "qgscomposerpolyline.h"
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#include "qgscomposition.h"
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#include "qgscomposerutils.h"
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#include "qgssymbollayerutils.h"
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#include "qgssymbol.h"
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#include "qgsmapsettings.h"
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#include <limits>
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QgsComposerPolyline::QgsComposerPolyline( QgsComposition* c )
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: QgsComposerNodesItem( QStringLiteral( "ComposerPolyline" ), c )
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, mPolylineStyleSymbol( nullptr )
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{
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createDefaultPolylineStyleSymbol();
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}
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QgsComposerPolyline::QgsComposerPolyline( const QPolygonF& polyline, QgsComposition* c )
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: QgsComposerNodesItem( QStringLiteral( "ComposerPolyline" ), polyline, c )
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, mPolylineStyleSymbol( nullptr )
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{
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createDefaultPolylineStyleSymbol();
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}
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bool QgsComposerPolyline::_addNode( const int indexPoint,
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QPointF newPoint,
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const double radius )
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{
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const double distStart = computeDistance( newPoint, mPolygon[0] );
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const double distEnd = computeDistance( newPoint, mPolygon[mPolygon.size()-1] );
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if ( indexPoint == ( mPolygon.size() - 1 ) )
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{
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if ( distEnd < radius )
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mPolygon.append( newPoint );
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else if ( distStart < radius )
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mPolygon.insert( 0, newPoint );
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}
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else
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mPolygon.insert( indexPoint + 1, newPoint );
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return true;
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}
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bool QgsComposerPolyline::_removeNode( const int index )
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{
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if ( index < 0 || index >= mPolygon.size() )
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return false;
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mPolygon.remove( index );
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if ( mPolygon.size() < 2 )
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mPolygon.clear();
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else
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{
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int newSelectNode = index;
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if ( index >= mPolygon.size() )
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newSelectNode = mPolygon.size() - 1;
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setSelectedNode( newSelectNode );
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}
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return true;
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}
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void QgsComposerPolyline::createDefaultPolylineStyleSymbol()
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{
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QgsStringMap properties;
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properties.insert( QStringLiteral( "color" ), QStringLiteral( "0,0,0,255" ) );
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properties.insert( QStringLiteral( "width" ), QStringLiteral( "0.3" ) );
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properties.insert( QStringLiteral( "capstyle" ), QStringLiteral( "square" ) );
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mPolylineStyleSymbol.reset( QgsLineSymbol::createSimple( properties ) );
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emit frameChanged();
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}
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QString QgsComposerPolyline::displayName() const
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{
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if ( !id().isEmpty() )
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return id();
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return tr( "<polyline>" );
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}
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void QgsComposerPolyline::_draw( QPainter *painter )
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{
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double dotsPerMM = painter->device()->logicalDpiX() / 25.4;
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QgsRenderContext context = QgsComposerUtils::createRenderContextForComposition( mComposition, painter );
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context.setForceVectorOutput( true );
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QgsExpressionContext expressionContext = createExpressionContext();
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context.setExpressionContext( expressionContext );
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painter->scale( 1 / dotsPerMM, 1 / dotsPerMM ); // scale painter from mm to dots
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QTransform t = QTransform::fromScale( dotsPerMM, dotsPerMM );
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mPolylineStyleSymbol->startRender( context );
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mPolylineStyleSymbol->renderPolyline( t.map( mPolygon ), nullptr, context );
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mPolylineStyleSymbol->stopRender( context );
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painter->scale( dotsPerMM, dotsPerMM );
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}
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void QgsComposerPolyline::_readXmlStyle( const QDomElement &elmt )
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{
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mPolylineStyleSymbol.reset( QgsSymbolLayerUtils::loadSymbol<QgsLineSymbol>( elmt ) );
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}
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void QgsComposerPolyline::setPolylineStyleSymbol( QgsLineSymbol* symbol )
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{
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mPolylineStyleSymbol.reset( static_cast<QgsLineSymbol*>( symbol->clone() ) );
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update();
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emit frameChanged();
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}
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void QgsComposerPolyline::_writeXmlStyle( QDomDocument &doc, QDomElement &elmt ) const
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{
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const QDomElement pe = QgsSymbolLayerUtils::saveSymbol( QString(),
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mPolylineStyleSymbol.get(),
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doc );
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elmt.appendChild( pe );
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}
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