Restore attribute table atlas handling

python/core/layout/qgslayoutcontext.sip

@@ -224,6 +224,11 @@ If ``layer`` is -1, all item layers should be rendered.
 Emitted whenever the context's ``flags`` change.
 
 .. seealso:: :py:func:`setFlags()`
+%End
+
+    void layerChanged( QgsVectorLayer *layer );
+%Docstring
+Emitted when the context's ``layer`` is changed.
 %End
 
     void changed();

python/gui/layout/qgslayoutitemwidget.sip

@@ -50,6 +50,10 @@ Updates a data defined button to reflect the item's current properties.
 Returns the current layout context coverage layer (if set).
 %End
 
+    QgsLayoutAtlas *layoutAtlas() const;
+%Docstring
+Returns the atlas for the layout, if available
+%End
 
 };
 
@@ -117,7 +121,10 @@ Implementations must return true if the item was accepted and
 the widget was updated.
 %End
 
-
+    QgsLayoutAtlas *layoutAtlas() const;
+%Docstring
+Returns the atlas for the layout (if available)
+%End
 
 };
 

src/app/layout/qgslayoutattributetablewidget.cpp

@@ -16,7 +16,7 @@
  ***************************************************************************/
 
 #include "qgslayoutattributetablewidget.h"
-#include "qgsatlascomposition.h"
+#include "qgslayoutatlas.h"
 #include "qgslayout.h"
 #include "qgslayoutframe.h"
 #include "qgslayoutattributeselectiondialog.h"
@@ -87,10 +87,7 @@ QgsLayoutAttributeTableWidget::QgsLayoutAttributeTableWidget( QgsLayoutFrame *fr
   mWrapBehaviorComboBox->addItem( tr( "Truncate text" ), QgsLayoutTable::TruncateText );
   mWrapBehaviorComboBox->addItem( tr( "Wrap text" ), QgsLayoutTable::WrapText );
 
-  bool atlasEnabled = false;
-#if 0 //TODO
-  atlasComposition() &&atlasComposition()->enabled();
-#endif
+  bool atlasEnabled = layoutAtlas() && layoutAtlas()->enabled();
   mSourceComboBox->addItem( tr( "Layer features" ), QgsLayoutItemAttributeTable::LayerAttributes );
   toggleAtlasSpecificControls( atlasEnabled );
 
@@ -126,16 +123,14 @@ QgsLayoutAttributeTableWidget::QgsLayoutAttributeTableWidget( QgsLayoutFrame *fr
   {
     connect( mTable, &QgsLayoutMultiFrame::changed, this, &QgsLayoutAttributeTableWidget::updateGuiElements );
 
-#if 0 //TODO
-    QgsAtlasComposition *atlas = atlasComposition();
-    if ( atlas )
+    // repopulate relations combo box if atlas layer changes
+    connect( &mTable->layout()->context(), &QgsLayoutContext::layerChanged,
+             this, &QgsLayoutAttributeTableWidget::updateRelationsCombo );
+
+    if ( QgsLayoutAtlas *atlas = layoutAtlas() )
     {
-      // repopulate relations combo box if atlas layer changes
-      connect( atlas, &QgsAtlasComposition::coverageLayerChanged,
-               this, &QgsLayoutAttributeTableWidget::updateRelationsCombo );
-      connect( atlas, &QgsAtlasComposition::toggled, this, &QgsLayoutAttributeTableWidget::atlasToggled );
+      connect( atlas, &QgsLayoutAtlas::toggled, this, &QgsLayoutAttributeTableWidget::atlasToggled );
     }
-#endif
   }
 
   //embed widget for general options
@@ -486,9 +481,8 @@ void QgsLayoutAttributeTableWidget::updateGuiElements()
 
 void QgsLayoutAttributeTableWidget::atlasToggled()
 {
-#if 0 //TODO
   //display/hide atlas options in source combobox depending on atlas status
-  bool atlasEnabled = atlasComposition() && atlasComposition()->enabled();
+  bool atlasEnabled = layoutAtlas() && layoutAtlas()->enabled();
   toggleAtlasSpecificControls( atlasEnabled );
 
   if ( !mTable )
@@ -500,19 +494,18 @@ void QgsLayoutAttributeTableWidget::atlasToggled()
   {
     mTable->setFilterToAtlasFeature( false );
   }
-#endif
 }
 
 void QgsLayoutAttributeTableWidget::updateRelationsCombo()
 {
   mRelationsComboBox->blockSignals( true );
   mRelationsComboBox->clear();
-#if 0 //TODO
-  QgsVectorLayer *atlasLayer = atlasCoverageLayer();
+
+  QgsVectorLayer *atlasLayer = coverageLayer();
   if ( atlasLayer )
   {
-    QList<QgsRelation> relations = QgsProject::instance()->relationManager()->referencedRelations( atlasLayer );
-    Q_FOREACH ( const QgsRelation &relation, relations )
+    const QList<QgsRelation> relations = QgsProject::instance()->relationManager()->referencedRelations( atlasLayer );
+    for ( const QgsRelation &relation : relations )
     {
       mRelationsComboBox->addItem( relation.name(), relation.id() );
     }
@@ -521,7 +514,7 @@ void QgsLayoutAttributeTableWidget::updateRelationsCombo()
       mRelationsComboBox->setCurrentIndex( mRelationsComboBox->findData( mTable->relationId() ) );
     }
   }
-#endif
+
   mRelationsComboBox->blockSignals( false );
 }
 

src/app/layout/qgslayoutlabelwidget.cpp

@@ -192,13 +192,10 @@ void QgsLayoutLabelWidget::mInsertExpressionButton_clicked()
     selText = selText.mid( 2, selText.size() - 4 );
 
   // use the atlas coverage layer, if any
-#if 0 //TODO
-  QgsVectorLayer *coverageLayer = atlasCoverageLayer();
-#endif
-  QgsVectorLayer *coverageLayer = nullptr;
+  QgsVectorLayer *layer = coverageLayer();
 
   QgsExpressionContext context = mLabel->createExpressionContext();
-  QgsExpressionBuilderDialog exprDlg( coverageLayer, selText, this, QStringLiteral( "generic" ), context );
+  QgsExpressionBuilderDialog exprDlg( layer, selText, this, QStringLiteral( "generic" ), context );
 
   exprDlg.setWindowTitle( tr( "Insert Expression" ) );
   if ( exprDlg.exec() == QDialog::Accepted )

src/core/layout/qgslayoutatlas.cpp

@@ -97,6 +97,7 @@ bool QgsLayoutAtlas::readXml( const QDomElement &atlasElem, const QDomDocument &
 
   mCoverageLayer = QgsVectorLayerRef( layerId, layerName, layerSource, layerProvider );
   mCoverageLayer.resolveWeakly( mLayout->project() );
+  mLayout->context().setLayer( mCoverageLayer.get() );
 
   mPageNameExpression = atlasElem.attribute( QStringLiteral( "pageNameExpression" ), QString() );
   QString error;

src/core/layout/qgslayoutcontext.cpp

@@ -83,6 +83,7 @@ QgsVectorLayer *QgsLayoutContext::layer() const
 void QgsLayoutContext::setLayer( QgsVectorLayer *layer )
 {
   mLayer = layer;
+  emit layerChanged( layer );
   emit changed();
 }
 

src/core/layout/qgslayoutcontext.h

@@ -225,6 +225,11 @@ class CORE_EXPORT QgsLayoutContext : public QObject
      */
     void flagsChanged( QgsLayoutContext::Flags flags );
 
+    /**
+     * Emitted when the context's \a layer is changed.
+     */
+    void layerChanged( QgsVectorLayer *layer );
+
     /**
      * Emitted certain settings in the context is changed, e.g. by setting a new feature or vector layer
      * for the context.

src/core/layout/qgslayoutitemattributetable.cpp

@@ -79,13 +79,8 @@ QgsLayoutItemAttributeTable::QgsLayoutItemAttributeTable( QgsLayout *layout )
   {
     connect( mLayout->project(), static_cast < void ( QgsProject::* )( const QString & ) >( &QgsProject::layerWillBeRemoved ), this, &QgsLayoutItemAttributeTable::removeLayer );
 
-#if 0 //TODO
-    //connect to atlas feature changes to update table rows
-    connect( &mComposition->atlasComposition(), &QgsAtlasComposition::featureChanged, this, &QgsLayoutTable::refreshAttributes );
-
-    //atlas coverage layer change = regenerate columns
-    connect( &mComposition->atlasComposition(), &QgsAtlasComposition::coverageLayerChanged, this, &QgsLayoutItemAttributeTable::atlasLayerChanged );
-#endif
+    //coverage layer change = regenerate columns
+    connect( &mLayout->context(), &QgsLayoutContext::layerChanged, this, &QgsLayoutItemAttributeTable::atlasLayerChanged );
   }
   refreshAttributes();
 }
@@ -394,17 +389,7 @@ bool QgsLayoutItemAttributeTable::getTableContents( QgsLayoutTableContents &cont
 {
   contents.clear();
 
-  if ( ( mSource == QgsLayoutItemAttributeTable::AtlasFeature || mSource == QgsLayoutItemAttributeTable::RelationChildren ) )
-#if 0 //TODO
-    // && !mComposition->atlasComposition().enabled() )
-#endif
-  {
-    //source mode requires atlas, but atlas disabled
-    return false;
-  }
-
   QgsVectorLayer *layer = sourceLayer();
-
   if ( !layer )
   {
     //no source layer
@@ -451,10 +436,7 @@ bool QgsLayoutItemAttributeTable::getTableContents( QgsLayoutTableContents &cont
   if ( mSource == QgsLayoutItemAttributeTable::RelationChildren )
   {
     QgsRelation relation = mLayout->project()->relationManager()->relation( mRelationId );
-    QgsFeature atlasFeature;
-#if 0 //TODO
-      = mLayout->atlasComposition().feature();
-#endif
+    QgsFeature atlasFeature = mLayout->context().feature();
     req = relation.getRelatedFeaturesRequest( atlasFeature );
   }
 
@@ -464,15 +446,9 @@ bool QgsLayoutItemAttributeTable::getTableContents( QgsLayoutTableContents &cont
   req.setFlags( mShowOnlyVisibleFeatures ? QgsFeatureRequest::ExactIntersect : QgsFeatureRequest::NoFlags );
 
   if ( mSource == QgsLayoutItemAttributeTable::AtlasFeature )
-#if 0 // TODO
-    && mComposition->atlasComposition().enabled() )
-#endif
   {
     //source mode is current atlas feature
-    QgsFeature atlasFeature;
-#if 0 //TODO
-      = mLayout->atlasComposition().feature();
-#endif
+    QgsFeature atlasFeature = mLayout->context().feature();
     req.setFilterFid( atlasFeature.id() );
   }
 
@@ -497,18 +473,12 @@ bool QgsLayoutItemAttributeTable::getTableContents( QgsLayoutTableContents &cont
     if ( mFilterToAtlasIntersection )
     {
       if ( !f.hasGeometry() )
-#if 0 //TODO
-        || ! mComposition->atlasComposition().enabled() )
-#endif
       {
         continue;
       }
-      QgsFeature atlasFeature;
-#if 0 //TODO
-        = mComposition->atlasComposition().feature();
-#endif
+      QgsFeature atlasFeature = mLayout->context().feature();
       if ( !atlasFeature.hasGeometry() ||
-             !f.geometry().intersects( atlasFeature.geometry() ) )
+           !f.geometry().intersects( atlasFeature.geometry() ) )
       {
         //feature falls outside current atlas feature
         continue;
@@ -584,10 +554,7 @@ QgsVectorLayer *QgsLayoutItemAttributeTable::sourceLayer()
   switch ( mSource )
   {
     case QgsLayoutItemAttributeTable::AtlasFeature:
-#if 0 //TODO
-      return mComposition->atlasComposition().coverageLayer();
-#endif
-      return nullptr;
+      return mLayout->context().layer();
     case QgsLayoutItemAttributeTable::LayerAttributes:
       return mVectorLayer.get();
     case QgsLayoutItemAttributeTable::RelationChildren:
@@ -704,10 +671,7 @@ bool QgsLayoutItemAttributeTable::readPropertiesFromElement( const QDomElement &
 
   if ( mSource == QgsLayoutItemAttributeTable::AtlasFeature )
   {
-    mCurrentAtlasLayer = nullptr;
-#if 0 //TODO
-    mComposition->atlasComposition().coverageLayer();
-#endif
+    mCurrentAtlasLayer = mLayout->context().layer();
   }
 
   mShowUniqueRowsOnly = itemElem.attribute( QStringLiteral( "showUniqueRowsOnly" ), QStringLiteral( "0" ) ).toInt();

src/gui/layout/qgslayoutitemwidget.cpp

@@ -18,6 +18,8 @@
 #include "qgslayout.h"
 #include "qgsproject.h"
 #include "qgslayoutundostack.h"
+#include "qgsprintlayout.h"
+#include "qgslayoutatlas.h"
 
 //
 // QgsLayoutConfigObject
@@ -27,11 +29,15 @@ QgsLayoutConfigObject::QgsLayoutConfigObject( QWidget *parent, QgsLayoutObject *
   : QObject( parent )
   , mLayoutObject( layoutObject )
 {
-#if 0 //TODO
-  connect( atlasComposition(), &QgsAtlasComposition::coverageLayerChanged,
-           this, [ = ] { updateDataDefinedButtons(); } );
-  connect( atlasComposition(), &QgsAtlasComposition::toggled, this, &QgsComposerConfigObject::updateDataDefinedButtons );
-#endif
+  if ( mLayoutObject->layout() )
+  {
+    connect( &mLayoutObject->layout()->context(), &QgsLayoutContext::layerChanged,
+             this, [ = ] { updateDataDefinedButtons(); } );
+  }
+  if ( layoutAtlas() )
+  {
+    connect( layoutAtlas(), &QgsLayoutAtlas::toggled, this, &QgsLayoutConfigObject::updateDataDefinedButtons );
+  }
 }
 
 void QgsLayoutConfigObject::updateDataDefinedProperty()
@@ -62,12 +68,11 @@ void QgsLayoutConfigObject::updateDataDefinedProperty()
 
 void QgsLayoutConfigObject::updateDataDefinedButtons()
 {
-#if 0 //TODO
-  Q_FOREACH ( QgsPropertyOverrideButton *button, findChildren< QgsPropertyOverrideButton * >() )
+  const QList< QgsPropertyOverrideButton * > buttons = findChildren< QgsPropertyOverrideButton * >();
+  for ( QgsPropertyOverrideButton *button : buttons )
   {
-    button->setVectorLayer( atlasCoverageLayer() );
+    button->setVectorLayer( coverageLayer() );
   }
-#endif
 }
 
 void QgsLayoutConfigObject::initializeDataDefinedButton( QgsPropertyOverrideButton *button, QgsLayoutObject::DataDefinedProperty key )
@@ -91,24 +96,22 @@ void QgsLayoutConfigObject::updateDataDefinedButton( QgsPropertyOverrideButton *
   whileBlocking( button )->setToProperty( mLayoutObject->dataDefinedProperties().property( key ) );
 }
 
-#if 0 // TODO
-QgsAtlasComposition *QgsLayoutConfigObject::atlasComposition() const
+QgsLayoutAtlas *QgsLayoutConfigObject::layoutAtlas() const
 {
   if ( !mLayoutObject )
   {
     return nullptr;
   }
 
-  QgsComposition *composition = mComposerObject->composition();
+  QgsPrintLayout *printLayout = qobject_cast< QgsPrintLayout * >( mLayoutObject->layout() );
 
-  if ( !composition )
+  if ( !printLayout )
   {
     return nullptr;
   }
 
-  return &composition->atlasComposition();
+  return printLayout->atlas();
 }
-#endif
 
 QgsVectorLayer *QgsLayoutConfigObject::coverageLayer() const
 {
@@ -171,13 +174,10 @@ bool QgsLayoutItemBaseWidget::setNewItem( QgsLayoutItem * )
   return false;
 }
 
-#if 0 //TODO
-QgsAtlasComposition *QgsLayoutItemBaseWidget::atlasComposition() const
+QgsLayoutAtlas *QgsLayoutItemBaseWidget::layoutAtlas() const
 {
-  return mConfigObject->atlasComposition();
+  return mConfigObject->layoutAtlas();
 }
-#endif
-
 
 //
 
@@ -259,10 +259,6 @@ QgsLayoutItemPropertiesWidget::QgsLayoutItemPropertiesWidget( QWidget *parent, Q
 
   initializeDataDefinedButtons();
 
-#if 0 //TODO
-  connect( mItem->composition(), &QgsComposition::paperSizeChanged, this, &QgsLayoutItemPropertiesWidget::setValuesForGuiPositionElements );
-#endif
-
   setItem( item );
 
   connect( mOpacityWidget, &QgsOpacityWidget::opacityChanged, this, &QgsLayoutItemPropertiesWidget::opacityChanged );