Remove map settings parameter from QgsComposition

Breaks the hard link between canvas and compositions!

Fix #11077

doc/api_break.dox

@@ -660,7 +660,10 @@ to use the QgsProperty framework objects.
 QgsComposition        {#qgis_api_break_3_0_QgsComposition}
 --------------
 
-- constructor requires QgsProject instance as the second argument
+- The constructor no longer takes a reference to a QgsMapSettings object. This is no longer
+used by compositions. To set the layers to show in composer maps, the QgsComposerMap::setLayers()
+method should be used instead.
+- constructor requires QgsProject instance
 - addItemsFromXML() has been renamed to addItemsFromXml()
 - Constructor with QgsMapRenderer parameter has been removed. Use the variant with QgsMapSettings parameter.
 - mapRenderer() has been removed. Use mapSettings() instead.
@@ -674,6 +677,7 @@ were removed. Use setSnapTolerance() and snapTolerance() instead.
 - worldFileMap() and setWorldFileMap() have been renamed to referenceMap() and setReferenceMap()
 - dataDefinedProperty() and setDataDefinedProperty() now use the QgsProperty framework instead
 of QgsDataDefined objects.
+- mapSettings() was removed. Use QgsComposerMap::mapSettings() instead.
 
 
 QgsCoordinateReferenceSystem        {#qgis_api_break_3_0_QgsCoordinateReferenceSystem}

python/core/composer/qgscomposition.sip

@@ -40,7 +40,7 @@ class QgsComposition : QGraphicsScene, QgsExpressionContextGenerator
       Landscape
     };
 
-    explicit QgsComposition( const QgsMapSettings& mapSettings, QgsProject* project );
+    explicit QgsComposition( QgsProject* project );
 
     /** Composition atlas modes*/
     enum AtlasMode
@@ -366,10 +366,6 @@ class QgsComposition : QGraphicsScene, QgsExpressionContextGenerator
     /** Used to enable or disable advanced effects such as blend modes in a composition */
     void setUseAdvancedEffects( const bool effectsEnabled );
 
-    //! Return setting of QGIS map canvas
-    //! @note added in 2.4
-    const QgsMapSettings& mapSettings() const;
-
     QgsComposition::PlotStyle plotStyle() const;
     void setPlotStyle( const QgsComposition::PlotStyle style );
 

src/app/composer/qgscomposer.cpp

@@ -547,7 +547,7 @@ QgsComposer::QgsComposer( QgisApp *qgis, const QString& title )
   connect( mActionShowRulers, SIGNAL( triggered( bool ) ), this, SLOT( toggleRulers( bool ) ) );
 
   //init undo/redo buttons
-  mComposition = new QgsComposition( mQgis->mapCanvas()->mapSettings(), QgsProject::instance() );
+  mComposition = new QgsComposition( QgsProject::instance() );
 
   mActionUndo->setEnabled( false );
   mActionRedo->setEnabled( false );
@@ -3560,7 +3560,7 @@ void QgsComposer::readXml( const QDomElement& composerElem, const QDomDocument&
   createComposerView();
 
   //read composition settings
-  mComposition = new QgsComposition( mQgis->mapCanvas()->mapSettings(), QgsProject::instance() );
+  mComposition = new QgsComposition( QgsProject::instance() );
   QDomNodeList compositionNodeList = composerElem.elementsByTagName( QStringLiteral( "Composition" ) );
   if ( compositionNodeList.size() > 0 )
   {

src/core/composer/qgscomposition.cpp

@@ -60,9 +60,8 @@
 #include "gdal.h"
 #include "cpl_conv.h"
 
-QgsComposition::QgsComposition( const QgsMapSettings& mapSettings, QgsProject* project )
+QgsComposition::QgsComposition( QgsProject* project )
     : QGraphicsScene( nullptr )
-    , mMapSettings( mapSettings )
     , mProject( project )
     , mAtlasComposition( this )
 {

src/core/composer/qgscomposition.h

@@ -104,8 +104,10 @@ class CORE_EXPORT QgsComposition : public QGraphicsScene, public QgsExpressionCo
       Landscape
     };
 
-    //! Construct a composition, using given map settings and project
-    explicit QgsComposition( const QgsMapSettings& mapSettings, QgsProject* project );
+    /**
+     * Construct a new composition linked to the specified project.
+     */
+    explicit QgsComposition( QgsProject* project );
 
     //! Composition atlas modes
     enum AtlasMode
@@ -443,10 +445,6 @@ class CORE_EXPORT QgsComposition : public QGraphicsScene, public QgsExpressionCo
     //! Used to enable or disable advanced effects such as blend modes in a composition
     void setUseAdvancedEffects( const bool effectsEnabled );
 
-    //! Return setting of QGIS map canvas
-    //! @note added in 2.4
-    const QgsMapSettings& mapSettings() const { return mMapSettings; }
-
     QgsComposition::PlotStyle plotStyle() const { return mPlotStyle; }
     void setPlotStyle( const QgsComposition::PlotStyle style ) { mPlotStyle = style; }
 
@@ -862,8 +860,6 @@ class CORE_EXPORT QgsComposition : public QGraphicsScene, public QgsExpressionCo
 
 
   private:
-    //! Reference to map settings of QGIS main map
-    const QgsMapSettings& mMapSettings;
 
     //! Pointer to associated project (not null)
     QgsProject* mProject;

src/plugins/georeferencer/qgsgeorefplugingui.cpp

@@ -1522,7 +1522,7 @@ bool QgsGeorefPluginGui::writePDFMapFile( const QString& fileName, const QgsGeor
   double paperHeight = s.value( QStringLiteral( "/Plugin-GeoReferencer/Config/HeightPDFMap" ), "420" ).toDouble();
 
   //create composition
-  QgsComposition* composition = new QgsComposition( mCanvas->mapSettings(), QgsProject::instance() );
+  QgsComposition* composition = new QgsComposition( QgsProject::instance() );
   if ( mapRatio >= 1 )
   {
     composition->setPaperSize( paperHeight, paperWidth );
@@ -1589,7 +1589,7 @@ bool QgsGeorefPluginGui::writePDFReportFile( const QString& fileName, const QgsG
   }
 
   //create composition A4 with 300 dpi
-  QgsComposition* composition = new QgsComposition( mCanvas->mapSettings(), QgsProject::instance() );
+  QgsComposition* composition = new QgsComposition( QgsProject::instance() );
   composition->setPaperSize( 210, 297 ); //A4
   composition->setPrintResolution( 300 );
   composition->setNumPages( 2 );

src/server/qgswmsprojectparser.cpp

@@ -26,6 +26,7 @@
 #include "qgspallabeling.h"
 #include "qgsrenderer.h"
 #include "qgsvectorlayer.h"
+#include "qgsmapsettings.h"
 
 #include "qgscomposition.h"
 #include "qgscomposerarrow.h"
@@ -475,7 +476,7 @@ QgsComposition* QgsWmsProjectParser::initComposition( const QString& composerTem
     return nullptr;
   }
 
-  QgsComposition* composition = new QgsComposition( mapSettings, QgsProject::instance() ); //set resolution, paper size from composer element attributes
+  QgsComposition* composition = new QgsComposition( QgsProject::instance() ); //set resolution, paper size from composer element attributes
   if ( !composition->readXml( compositionElem, *( mProjectParser->xmlDocument() ) ) )
   {
     delete composition;
@@ -503,6 +504,8 @@ QgsComposition* QgsWmsProjectParser::initComposition( const QString& composerTem
     QgsComposerMap* map = qobject_cast< QgsComposerMap *>( *itemIt );
     if ( map )
     {
+      if ( !map->keepLayerSet() )
+        map->setLayers( mapSettings.layers() );
       mapList.push_back( map );
       continue;
     }

tests/src/core/testqgs25drenderer.cpp

@@ -126,10 +126,11 @@ void TestQgs25DRenderer::render()
 
 void TestQgs25DRenderer::renderComposition()
 {
-  QgsComposition* composition = new QgsComposition( mMapSettings, QgsProject::instance() );
+  QgsComposition* composition = new QgsComposition( QgsProject::instance() );
   composition->setPaperSize( 297, 210 ); //A4 landscape
   QgsComposerMap* map = new QgsComposerMap( composition, 20, 20, 200, 100 );
   map->setFrameEnabled( true );
+  map->setLayers( QList< QgsMapLayer* >() << mpPolysLayer );
   composition->addComposerMap( map );
 
   map->setNewExtent( mpPolysLayer->extent() );

tests/src/core/testqgsatlascomposition.cpp

@@ -43,7 +43,6 @@ class TestQgsAtlasComposition : public QObject
         , mLabel2( 0 )
         , mAtlasMap( 0 )
         , mOverview( 0 )
-        , mMapSettings( 0 )
         , mVectorLayer( 0 )
         , mVectorLayer2( 0 )
         , mAtlas( 0 )
@@ -84,7 +83,6 @@ class TestQgsAtlasComposition : public QObject
     QgsComposerLabel* mLabel2;
     QgsComposerMap* mAtlasMap;
     QgsComposerMap* mOverview;
-    QgsMapSettings *mMapSettings;
     QgsVectorLayer* mVectorLayer;
     QgsVectorLayer* mVectorLayer2;
     QgsAtlasComposition* mAtlas;
@@ -96,8 +94,6 @@ void TestQgsAtlasComposition::initTestCase()
   QgsApplication::init();
   QgsApplication::initQgis();
 
-  mMapSettings = new QgsMapSettings();
-
   //create maplayers from testdata and add to layer registry
   QFileInfo vectorFileInfo( QStringLiteral( TEST_DATA_DIR ) + "/france_parts.shp" );
   mVectorLayer = new QgsVectorLayer( vectorFileInfo.filePath(),
@@ -115,9 +111,7 @@ void TestQgsAtlasComposition::initTestCase()
 }
 
 TestQgsAtlasComposition::~TestQgsAtlasComposition()
-{
-  delete mMapSettings;
-}
+{}
 
 
 void TestQgsAtlasComposition::cleanupTestCase()
@@ -139,15 +133,12 @@ void TestQgsAtlasComposition::cleanupTestCase()
 void TestQgsAtlasComposition::init()
 {
   //create composition with composer map
-  mMapSettings->setLayers( QList<QgsMapLayer*>() << mVectorLayer );
-  mMapSettings->setCrsTransformEnabled( true );
-  mMapSettings->setMapUnits( QgsUnitTypes::DistanceMeters );
 
   // select epsg:2154
   QgsCoordinateReferenceSystem crs;
   crs.createFromSrid( 2154 );
   QgsProject::instance()->setCrs( crs );
-  mComposition = new QgsComposition( *mMapSettings, QgsProject::instance() );
+  mComposition = new QgsComposition( QgsProject::instance() );
   mComposition->setPaperSize( 297, 210 ); //A4 landscape
 
   // fix the renderer, fill with green
@@ -163,6 +154,7 @@ void TestQgsAtlasComposition::init()
   // Make sure it doesn't try to render a map for caching onto a still 0-sized image
   mAtlasMap->setPreviewMode( QgsComposerMap::Rectangle );
   mComposition->addComposerMap( mAtlasMap, false );
+  mAtlasMap->setLayers( QList<QgsMapLayer*>() << mVectorLayer );
 
   mAtlas = &mComposition->atlasComposition();
   mAtlas->setCoverageLayer( mVectorLayer );
@@ -174,6 +166,7 @@ void TestQgsAtlasComposition::init()
   mOverview->setFrameEnabled( true );
   mOverview->overview()->setFrameMap( mAtlasMap->id() );
   mOverview->setPreviewMode( QgsComposerMap::Rectangle );
+  mOverview->setLayers( QList<QgsMapLayer*>() << mVectorLayer );
   mComposition->addComposerMap( mOverview, false );
   mOverview->setNewExtent( QgsRectangle( 49670.718, 6415139.086, 699672.519, 7065140.887 ) );
 

tests/src/core/testqgscomposerdd.cpp

@@ -38,7 +38,6 @@ class TestQgsComposerDD : public QObject
   public:
     TestQgsComposerDD()
         : mComposition( 0 )
-        , mMapSettings( 0 )
         , mVectorLayer( 0 )
         , mAtlasMap( 0 )
         , mAtlas( 0 )
@@ -54,7 +53,6 @@ class TestQgsComposerDD : public QObject
 
   private:
     QgsComposition *mComposition;
-    QgsMapSettings *mMapSettings;
     QgsVectorLayer* mVectorLayer;
     QgsComposerMap* mAtlasMap;
     QgsAtlasComposition* mAtlas;
@@ -66,8 +64,6 @@ void TestQgsComposerDD::initTestCase()
   QgsApplication::init();
   QgsApplication::initQgis();
 
-  mMapSettings = new QgsMapSettings();
-
   //create maplayers from testdata and add to layer registry
   QFileInfo vectorFileInfo( QStringLiteral( TEST_DATA_DIR ) + "/france_parts.shp" );
   mVectorLayer = new QgsVectorLayer( vectorFileInfo.filePath(),
@@ -79,15 +75,11 @@ void TestQgsComposerDD::initTestCase()
   mVectorLayer->setSimplifyMethod( simplifyMethod );
 
   //create composition with composer map
-  mMapSettings->setLayers( QList<QgsMapLayer*>() << mVectorLayer );
-  mMapSettings->setCrsTransformEnabled( true );
-  mMapSettings->setMapUnits( QgsUnitTypes::DistanceMeters );
 
   // select epsg:2154
   QgsCoordinateReferenceSystem crs;
   crs.createFromSrid( 2154 );
-  mMapSettings->setDestinationCrs( crs );
-  mComposition = new QgsComposition( *mMapSettings, QgsProject::instance() );
+  mComposition = new QgsComposition( QgsProject::instance() );
   mComposition->setPaperSize( 297, 210 ); //A4 landscape
 
   // fix the renderer, fill with green
@@ -114,7 +106,6 @@ void TestQgsComposerDD::initTestCase()
 void TestQgsComposerDD::cleanupTestCase()
 {
   delete mComposition;
-  delete mMapSettings;
   delete mVectorLayer;
 
   QString myReportFile = QDir::tempPath() + "/qgistest.html";

tests/src/core/testqgscomposereffects.cpp

@@ -34,7 +34,6 @@ class TestQgsComposerEffects : public QObject
         : mComposition( 0 )
         , mComposerRect1( 0 )
         , mComposerRect2( 0 )
-        , mMapSettings( 0 )
     {}
 
   private slots:
@@ -49,7 +48,6 @@ class TestQgsComposerEffects : public QObject
     QgsComposition* mComposition;
     QgsComposerShape *mComposerRect1;
     QgsComposerShape *mComposerRect2;
-    QgsMapSettings *mMapSettings;
     QString mReport;
 };
 
@@ -58,11 +56,9 @@ void TestQgsComposerEffects::initTestCase()
   QgsApplication::init();
   QgsApplication::initQgis();
 
-  mMapSettings = new QgsMapSettings();
-
   //create composition with two rectangles
 
-  mComposition = new QgsComposition( *mMapSettings, QgsProject::instance() );
+  mComposition = new QgsComposition( QgsProject::instance() );
   mComposition->setPaperSize( 297, 210 ); //A4 landscape
   mComposerRect1 = new QgsComposerShape( 20, 20, 150, 100, mComposition );
   mComposerRect1->setShapeType( QgsComposerShape::Rectangle );
@@ -79,7 +75,6 @@ void TestQgsComposerEffects::initTestCase()
 void TestQgsComposerEffects::cleanupTestCase()
 {
   delete mComposition;
-  delete mMapSettings;
 
   QString myReportFile = QDir::tempPath() + "/qgistest.html";
   QFile myFile( myReportFile );

tests/src/core/testqgscomposergroup.cpp

@@ -81,7 +81,7 @@ void TestQgsComposerGroup::initTestCase()
   QgsApplication::initQgis();
 
   mMapSettings = new QgsMapSettings();
-  mComposition = new QgsComposition( *mMapSettings, QgsProject::instance() );
+  mComposition = new QgsComposition( QgsProject::instance() );
   mComposition->setPaperSize( 297, 210 ); //A4 landscape
 
   //create some items

tests/src/core/testqgscomposerhtml.cpp

@@ -51,14 +51,12 @@ class TestQgsComposerHtml : public QObject
 
   private:
     QgsComposition *mComposition;
-    QgsMapSettings *mMapSettings;
     QString mReport;
     QFont mTestFont;
 };
 
 TestQgsComposerHtml::TestQgsComposerHtml()
     : mComposition( 0 )
-    , mMapSettings( 0 )
 {
 
 }
@@ -68,8 +66,7 @@ void TestQgsComposerHtml::initTestCase()
   QgsApplication::init();
   QgsApplication::initQgis();
 
-  mMapSettings = new QgsMapSettings();
-  mComposition = new QgsComposition( *mMapSettings, QgsProject::instance() );
+  mComposition = new QgsComposition( QgsProject::instance() );
   mComposition->setPaperSize( 297, 210 ); //A4 landscape
 
   mReport = QStringLiteral( "<h1>Composer HTML Tests</h1>\n" );
@@ -81,7 +78,6 @@ void TestQgsComposerHtml::initTestCase()
 void TestQgsComposerHtml::cleanupTestCase()
 {
   delete mComposition;
-  delete mMapSettings;
 
   QString myReportFile = QDir::tempPath() + "/qgistest.html";
   QFile myFile( myReportFile );