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qgslayoutitemmap.cpp
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qgslayoutitemmap.cpp
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/***************************************************************************
qgslayoutitemmap.cpp
---------------------
begin : July 2017
copyright : (C) 2017 by Nyall Dawson
email : nyall dot dawson 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 "qgslayoutitemmap.h"
#include "qgslayout.h"
#include "qgslayoutrendercontext.h"
#include "qgslayoutreportcontext.h"
#include "qgslayoututils.h"
#include "qgslayoutmodel.h"
#include "qgsmapthemecollection.h"
#include "qgsannotationmanager.h"
#include "qgsannotation.h"
#include "qgsmapsettingsutils.h"
#include "qgslayertree.h"
#include "qgsmaplayerref.h"
#include "qgsmaplayerlistutils.h"
#include "qgsmaplayerstylemanager.h"
#include "qgsvectorlayer.h"
#include "qgsexpressioncontext.h"
#include "qgsapplication.h"
#include "qgsexpressioncontextutils.h"
#include "qgsstyleentityvisitor.h"
#include <QPainter>
#include <QStyleOptionGraphicsItem>
QgsLayoutItemMap::QgsLayoutItemMap( QgsLayout *layout )
: QgsLayoutItem( layout )
, mAtlasClippingSettings( new QgsLayoutItemMapAtlasClippingSettings( this ) )
{
mBackgroundUpdateTimer = new QTimer( this );
mBackgroundUpdateTimer->setSingleShot( true );
connect( mBackgroundUpdateTimer, &QTimer::timeout, this, &QgsLayoutItemMap::recreateCachedImageInBackground );
assignFreeId();
setCacheMode( QGraphicsItem::NoCache );
connect( this, &QgsLayoutItem::sizePositionChanged, this, [ = ]
{
shapeChanged();
} );
mGridStack = qgis::make_unique< QgsLayoutItemMapGridStack >( this );
mOverviewStack = qgis::make_unique< QgsLayoutItemMapOverviewStack >( this );
connect( mAtlasClippingSettings, &QgsLayoutItemMapAtlasClippingSettings::changed, this, [ = ]
{
refresh();
} );
if ( layout )
connectUpdateSlot();
}
QgsLayoutItemMap::~QgsLayoutItemMap()
{
if ( mPainterJob )
{
disconnect( mPainterJob.get(), &QgsMapRendererCustomPainterJob::finished, this, &QgsLayoutItemMap::painterJobFinished );
emit backgroundTaskCountChanged( 0 );
mPainterJob->cancel(); // blocks
mPainter->end();
}
}
int QgsLayoutItemMap::type() const
{
return QgsLayoutItemRegistry::LayoutMap;
}
QIcon QgsLayoutItemMap::icon() const
{
return QgsApplication::getThemeIcon( QStringLiteral( "/mLayoutItemMap.svg" ) );
}
QgsLayoutItem::Flags QgsLayoutItemMap::itemFlags() const
{
return QgsLayoutItem::FlagOverridesPaint;
}
void QgsLayoutItemMap::assignFreeId()
{
if ( !mLayout )
return;
QList<QgsLayoutItemMap *> mapsList;
mLayout->layoutItems( mapsList );
int maxId = -1;
bool used = false;
for ( QgsLayoutItemMap *map : qgis::as_const( mapsList ) )
{
if ( map == this )
continue;
if ( map->mMapId == mMapId )
used = true;
maxId = std::max( maxId, map->mMapId );
}
if ( used )
{
mMapId = maxId + 1;
mLayout->itemsModel()->updateItemDisplayName( this );
}
updateToolTip();
}
QString QgsLayoutItemMap::displayName() const
{
if ( !QgsLayoutItem::id().isEmpty() )
{
return QgsLayoutItem::id();
}
return tr( "Map %1" ).arg( mMapId );
}
QgsLayoutItemMap *QgsLayoutItemMap::create( QgsLayout *layout )
{
return new QgsLayoutItemMap( layout );
}
void QgsLayoutItemMap::refresh()
{
QgsLayoutItem::refresh();
mCachedLayerStyleOverridesPresetName.clear();
invalidateCache();
updateAtlasFeature();
}
double QgsLayoutItemMap::scale() const
{
if ( rect().isEmpty() )
return 0;
QgsScaleCalculator calculator;
calculator.setMapUnits( crs().mapUnits() );
calculator.setDpi( 25.4 ); //Using mm
double widthInMm = mLayout->convertFromLayoutUnits( rect().width(), QgsUnitTypes::LayoutMillimeters ).length();
return calculator.calculate( extent(), widthInMm );
}
void QgsLayoutItemMap::setScale( double scaleDenominator, bool forceUpdate )
{
double currentScaleDenominator = scale();
if ( qgsDoubleNear( scaleDenominator, currentScaleDenominator ) || qgsDoubleNear( scaleDenominator, 0.0 ) )
{
return;
}
double scaleRatio = scaleDenominator / currentScaleDenominator;
mExtent.scale( scaleRatio );
if ( mAtlasDriven && mAtlasScalingMode == Fixed )
{
//if map is atlas controlled and set to fixed scaling mode, then scale changes should be treated as permanent
//and also apply to the map's original extent (see #9602)
//we can't use the scaleRatio calculated earlier, as the scale can vary depending on extent for geographic coordinate systems
QgsScaleCalculator calculator;
calculator.setMapUnits( crs().mapUnits() );
calculator.setDpi( 25.4 ); //QGraphicsView units are mm
scaleRatio = scaleDenominator / calculator.calculate( mExtent, rect().width() );
mExtent.scale( scaleRatio );
}
invalidateCache();
if ( forceUpdate )
{
emit changed();
update();
}
emit extentChanged();
}
void QgsLayoutItemMap::setExtent( const QgsRectangle &extent )
{
if ( mExtent == extent )
{
return;
}
mExtent = extent;
//recalculate data defined scale and extents, since that may override extent
refreshMapExtents();
//adjust height
QRectF currentRect = rect();
double newHeight = currentRect.width() * mExtent.height() / mExtent.width();
attemptSetSceneRect( QRectF( pos().x(), pos().y(), currentRect.width(), newHeight ) );
update();
}
void QgsLayoutItemMap::zoomToExtent( const QgsRectangle &extent )
{
QgsRectangle newExtent = extent;
QgsRectangle currentExtent = mExtent;
//Make sure the width/height ratio is the same as the current layout map extent.
//This is to keep the map item frame size fixed
double currentWidthHeightRatio = 1.0;
if ( !currentExtent.isNull() )
currentWidthHeightRatio = currentExtent.width() / currentExtent.height();
else
currentWidthHeightRatio = rect().width() / rect().height();
double newWidthHeightRatio = newExtent.width() / newExtent.height();
if ( currentWidthHeightRatio < newWidthHeightRatio )
{
//enlarge height of new extent, ensuring the map center stays the same
double newHeight = newExtent.width() / currentWidthHeightRatio;
double deltaHeight = newHeight - newExtent.height();
newExtent.setYMinimum( newExtent.yMinimum() - deltaHeight / 2 );
newExtent.setYMaximum( newExtent.yMaximum() + deltaHeight / 2 );
}
else
{
//enlarge width of new extent, ensuring the map center stays the same
double newWidth = currentWidthHeightRatio * newExtent.height();
double deltaWidth = newWidth - newExtent.width();
newExtent.setXMinimum( newExtent.xMinimum() - deltaWidth / 2 );
newExtent.setXMaximum( newExtent.xMaximum() + deltaWidth / 2 );
}
if ( mExtent == newExtent )
{
return;
}
mExtent = newExtent;
//recalculate data defined scale and extents, since that may override extent
refreshMapExtents();
invalidateCache();
emit changed();
emit extentChanged();
}
QgsRectangle QgsLayoutItemMap::extent() const
{
return mExtent;
}
QPolygonF QgsLayoutItemMap::visibleExtentPolygon() const
{
QPolygonF poly;
mapPolygon( mExtent, poly );
return poly;
}
QgsCoordinateReferenceSystem QgsLayoutItemMap::crs() const
{
if ( mCrs.isValid() )
return mCrs;
else if ( mLayout && mLayout->project() )
return mLayout->project()->crs();
return QgsCoordinateReferenceSystem();
}
void QgsLayoutItemMap::setCrs( const QgsCoordinateReferenceSystem &crs )
{
mCrs = crs;
}
QList<QgsMapLayer *> QgsLayoutItemMap::layers() const
{
return _qgis_listRefToRaw( mLayers );
}
void QgsLayoutItemMap::setLayers( const QList<QgsMapLayer *> &layers )
{
mLayers = _qgis_listRawToRef( layers );
}
void QgsLayoutItemMap::setLayerStyleOverrides( const QMap<QString, QString> &overrides )
{
if ( overrides == mLayerStyleOverrides )
return;
mLayerStyleOverrides = overrides;
emit layerStyleOverridesChanged(); // associated legends may listen to this
}
void QgsLayoutItemMap::storeCurrentLayerStyles()
{
mLayerStyleOverrides.clear();
for ( const QgsMapLayerRef &layerRef : qgis::as_const( mLayers ) )
{
if ( QgsMapLayer *layer = layerRef.get() )
{
QgsMapLayerStyle style;
style.readFromLayer( layer );
mLayerStyleOverrides.insert( layer->id(), style.xmlData() );
}
}
}
void QgsLayoutItemMap::setFollowVisibilityPreset( bool follow )
{
if ( mFollowVisibilityPreset == follow )
return;
mFollowVisibilityPreset = follow;
if ( !mFollowVisibilityPresetName.isEmpty() )
emit themeChanged( mFollowVisibilityPreset ? mFollowVisibilityPresetName : QString() );
}
void QgsLayoutItemMap::setFollowVisibilityPresetName( const QString &name )
{
if ( name == mFollowVisibilityPresetName )
return;
mFollowVisibilityPresetName = name;
if ( mFollowVisibilityPreset )
emit themeChanged( mFollowVisibilityPresetName );
}
void QgsLayoutItemMap::moveContent( double dx, double dy )
{
mLastRenderedImageOffsetX -= dx;
mLastRenderedImageOffsetY -= dy;
if ( !mDrawing )
{
transformShift( dx, dy );
mExtent.setXMinimum( mExtent.xMinimum() + dx );
mExtent.setXMaximum( mExtent.xMaximum() + dx );
mExtent.setYMinimum( mExtent.yMinimum() + dy );
mExtent.setYMaximum( mExtent.yMaximum() + dy );
//in case data defined extents are set, these override the calculated values
refreshMapExtents();
invalidateCache();
emit changed();
emit extentChanged();
}
}
void QgsLayoutItemMap::zoomContent( double factor, QPointF point )
{
if ( mDrawing )
{
return;
}
//find out map coordinates of position
double mapX = mExtent.xMinimum() + ( point.x() / rect().width() ) * ( mExtent.xMaximum() - mExtent.xMinimum() );
double mapY = mExtent.yMinimum() + ( 1 - ( point.y() / rect().height() ) ) * ( mExtent.yMaximum() - mExtent.yMinimum() );
//find out new center point
double centerX = ( mExtent.xMaximum() + mExtent.xMinimum() ) / 2;
double centerY = ( mExtent.yMaximum() + mExtent.yMinimum() ) / 2;
centerX = mapX + ( centerX - mapX ) * ( 1.0 / factor );
centerY = mapY + ( centerY - mapY ) * ( 1.0 / factor );
double newIntervalX, newIntervalY;
if ( factor > 0 )
{
newIntervalX = ( mExtent.xMaximum() - mExtent.xMinimum() ) / factor;
newIntervalY = ( mExtent.yMaximum() - mExtent.yMinimum() ) / factor;
}
else //no need to zoom
{
return;
}
mExtent.setXMaximum( centerX + newIntervalX / 2 );
mExtent.setXMinimum( centerX - newIntervalX / 2 );
mExtent.setYMaximum( centerY + newIntervalY / 2 );
mExtent.setYMinimum( centerY - newIntervalY / 2 );
if ( mAtlasDriven && mAtlasScalingMode == Fixed )
{
//if map is atlas controlled and set to fixed scaling mode, then scale changes should be treated as permanent
//and also apply to the map's original extent (see #9602)
//we can't use the scaleRatio calculated earlier, as the scale can vary depending on extent for geographic coordinate systems
QgsScaleCalculator calculator;
calculator.setMapUnits( crs().mapUnits() );
calculator.setDpi( 25.4 ); //QGraphicsView units are mm
double scaleRatio = scale() / calculator.calculate( mExtent, rect().width() );
mExtent.scale( scaleRatio );
}
//recalculate data defined scale and extents, since that may override zoom
refreshMapExtents();
invalidateCache();
emit changed();
emit extentChanged();
}
bool QgsLayoutItemMap::containsWmsLayer() const
{
const QList< QgsMapLayer * > layers = layersToRender();
for ( QgsMapLayer *layer : layers )
{
if ( layer->dataProvider() && layer->providerType() == QLatin1String( "wms" ) )
{
return true;
}
}
return false;
}
bool QgsLayoutItemMap::requiresRasterization() const
{
if ( QgsLayoutItem::requiresRasterization() )
return true;
// we MUST force the whole layout to render as a raster if any map item
// uses blend modes, and we are not drawing on a solid opaque background
// because in this case the map item needs to be rendered as a raster, but
// it also needs to interact with items below it
if ( !containsAdvancedEffects() )
return false;
// TODO layer transparency is probably ok to allow without forcing rasterization
if ( hasBackground() && qgsDoubleNear( backgroundColor().alphaF(), 1.0 ) )
return false;
return true;
}
bool QgsLayoutItemMap::containsAdvancedEffects() const
{
if ( QgsLayoutItem::containsAdvancedEffects() )
return true;
//check easy things first
//overviews
if ( mOverviewStack->containsAdvancedEffects() )
{
return true;
}
//grids
if ( mGridStack->containsAdvancedEffects() )
{
return true;
}
QgsMapSettings ms;
ms.setLayers( layersToRender() );
return ( !QgsMapSettingsUtils::containsAdvancedEffects( ms ).isEmpty() );
}
void QgsLayoutItemMap::setMapRotation( double rotation )
{
mMapRotation = rotation;
mEvaluatedMapRotation = mMapRotation;
invalidateCache();
emit mapRotationChanged( rotation );
emit changed();
}
double QgsLayoutItemMap::mapRotation( QgsLayoutObject::PropertyValueType valueType ) const
{
return valueType == QgsLayoutObject::EvaluatedValue ? mEvaluatedMapRotation : mMapRotation;
}
void QgsLayoutItemMap::setAtlasDriven( bool enabled )
{
mAtlasDriven = enabled;
if ( !enabled )
{
//if not enabling the atlas, we still need to refresh the map extents
//so that data defined extents and scale are recalculated
refreshMapExtents();
}
}
double QgsLayoutItemMap::atlasMargin( const QgsLayoutObject::PropertyValueType valueType )
{
if ( valueType == QgsLayoutObject::EvaluatedValue )
{
//evaluate data defined atlas margin
//start with user specified margin
double margin = mAtlasMargin;
QgsExpressionContext context = createExpressionContext();
bool ok = false;
double ddMargin = mDataDefinedProperties.valueAsDouble( QgsLayoutObject::MapAtlasMargin, context, 0.0, &ok );
if ( ok )
{
//divide by 100 to convert to 0 -> 1.0 range
margin = ddMargin / 100;
}
return margin;
}
else
{
return mAtlasMargin;
}
}
QgsLayoutItemMapGrid *QgsLayoutItemMap::grid()
{
if ( mGridStack->size() < 1 )
{
QgsLayoutItemMapGrid *grid = new QgsLayoutItemMapGrid( tr( "Grid %1" ).arg( 1 ), this );
mGridStack->addGrid( grid );
}
return mGridStack->grid( 0 );
}
QgsLayoutItemMapOverview *QgsLayoutItemMap::overview()
{
if ( mOverviewStack->size() < 1 )
{
QgsLayoutItemMapOverview *overview = new QgsLayoutItemMapOverview( tr( "Overview %1" ).arg( 1 ), this );
mOverviewStack->addOverview( overview );
}
return mOverviewStack->overview( 0 );
}
void QgsLayoutItemMap::draw( QgsLayoutItemRenderContext & )
{
}
bool QgsLayoutItemMap::writePropertiesToElement( QDomElement &mapElem, QDomDocument &doc, const QgsReadWriteContext &context ) const
{
if ( mKeepLayerSet )
{
mapElem.setAttribute( QStringLiteral( "keepLayerSet" ), QStringLiteral( "true" ) );
}
else
{
mapElem.setAttribute( QStringLiteral( "keepLayerSet" ), QStringLiteral( "false" ) );
}
if ( mDrawAnnotations )
{
mapElem.setAttribute( QStringLiteral( "drawCanvasItems" ), QStringLiteral( "true" ) );
}
else
{
mapElem.setAttribute( QStringLiteral( "drawCanvasItems" ), QStringLiteral( "false" ) );
}
//extent
QDomElement extentElem = doc.createElement( QStringLiteral( "Extent" ) );
extentElem.setAttribute( QStringLiteral( "xmin" ), qgsDoubleToString( mExtent.xMinimum() ) );
extentElem.setAttribute( QStringLiteral( "xmax" ), qgsDoubleToString( mExtent.xMaximum() ) );
extentElem.setAttribute( QStringLiteral( "ymin" ), qgsDoubleToString( mExtent.yMinimum() ) );
extentElem.setAttribute( QStringLiteral( "ymax" ), qgsDoubleToString( mExtent.yMaximum() ) );
mapElem.appendChild( extentElem );
if ( mCrs.isValid() )
{
QDomElement crsElem = doc.createElement( QStringLiteral( "crs" ) );
mCrs.writeXml( crsElem, doc );
mapElem.appendChild( crsElem );
}
// follow map theme
mapElem.setAttribute( QStringLiteral( "followPreset" ), mFollowVisibilityPreset ? QStringLiteral( "true" ) : QStringLiteral( "false" ) );
mapElem.setAttribute( QStringLiteral( "followPresetName" ), mFollowVisibilityPresetName );
//map rotation
mapElem.setAttribute( QStringLiteral( "mapRotation" ), QString::number( mMapRotation ) );
//layer set
QDomElement layerSetElem = doc.createElement( QStringLiteral( "LayerSet" ) );
for ( const QgsMapLayerRef &layerRef : mLayers )
{
if ( !layerRef )
continue;
QDomElement layerElem = doc.createElement( QStringLiteral( "Layer" ) );
QDomText layerIdText = doc.createTextNode( layerRef.layerId );
layerElem.appendChild( layerIdText );
layerElem.setAttribute( QStringLiteral( "name" ), layerRef.name );
layerElem.setAttribute( QStringLiteral( "source" ), layerRef.source );
layerElem.setAttribute( QStringLiteral( "provider" ), layerRef.provider );
layerSetElem.appendChild( layerElem );
}
mapElem.appendChild( layerSetElem );
// override styles
if ( mKeepLayerStyles )
{
QDomElement stylesElem = doc.createElement( QStringLiteral( "LayerStyles" ) );
for ( auto styleIt = mLayerStyleOverrides.constBegin(); styleIt != mLayerStyleOverrides.constEnd(); ++styleIt )
{
QDomElement styleElem = doc.createElement( QStringLiteral( "LayerStyle" ) );
QgsMapLayerRef ref( styleIt.key() );
ref.resolve( mLayout->project() );
styleElem.setAttribute( QStringLiteral( "layerid" ), ref.layerId );
styleElem.setAttribute( QStringLiteral( "name" ), ref.name );
styleElem.setAttribute( QStringLiteral( "source" ), ref.source );
styleElem.setAttribute( QStringLiteral( "provider" ), ref.provider );
QgsMapLayerStyle style( styleIt.value() );
style.writeXml( styleElem );
stylesElem.appendChild( styleElem );
}
mapElem.appendChild( stylesElem );
}
//grids
mGridStack->writeXml( mapElem, doc, context );
//overviews
mOverviewStack->writeXml( mapElem, doc, context );
//atlas
QDomElement atlasElem = doc.createElement( QStringLiteral( "AtlasMap" ) );
atlasElem.setAttribute( QStringLiteral( "atlasDriven" ), mAtlasDriven );
atlasElem.setAttribute( QStringLiteral( "scalingMode" ), mAtlasScalingMode );
atlasElem.setAttribute( QStringLiteral( "margin" ), qgsDoubleToString( mAtlasMargin ) );
mapElem.appendChild( atlasElem );
mapElem.setAttribute( QStringLiteral( "labelMargin" ), mLabelMargin.encodeMeasurement() );
mapElem.setAttribute( QStringLiteral( "mapFlags" ), static_cast< int>( mMapFlags ) );
QDomElement labelBlockingItemsElem = doc.createElement( QStringLiteral( "labelBlockingItems" ) );
for ( const auto &item : qgis::as_const( mBlockingLabelItems ) )
{
if ( !item )
continue;
QDomElement blockingItemElem = doc.createElement( QStringLiteral( "item" ) );
blockingItemElem.setAttribute( QStringLiteral( "uuid" ), item->uuid() );
labelBlockingItemsElem.appendChild( blockingItemElem );
}
mapElem.appendChild( labelBlockingItemsElem );
//temporal settings
mapElem.setAttribute( QStringLiteral( "isTemporal" ), isTemporal() ? 1 : 0 );
if ( isTemporal() )
{
mapElem.setAttribute( QStringLiteral( "temporalRangeBegin" ), temporalRange().begin().toString( Qt::ISODate ) );
mapElem.setAttribute( QStringLiteral( "temporalRangeEnd" ), temporalRange().end().toString( Qt::ISODate ) );
}
mAtlasClippingSettings->writeXml( mapElem, doc, context );
return true;
}
bool QgsLayoutItemMap::readPropertiesFromElement( const QDomElement &itemElem, const QDomDocument &doc, const QgsReadWriteContext &context )
{
mUpdatesEnabled = false;
//extent
QDomNodeList extentNodeList = itemElem.elementsByTagName( QStringLiteral( "Extent" ) );
if ( !extentNodeList.isEmpty() )
{
QDomElement extentElem = extentNodeList.at( 0 ).toElement();
double xmin, xmax, ymin, ymax;
xmin = extentElem.attribute( QStringLiteral( "xmin" ) ).toDouble();
xmax = extentElem.attribute( QStringLiteral( "xmax" ) ).toDouble();
ymin = extentElem.attribute( QStringLiteral( "ymin" ) ).toDouble();
ymax = extentElem.attribute( QStringLiteral( "ymax" ) ).toDouble();
setExtent( QgsRectangle( xmin, ymin, xmax, ymax ) );
}
QDomNodeList crsNodeList = itemElem.elementsByTagName( QStringLiteral( "crs" ) );
if ( !crsNodeList.isEmpty() )
{
QDomElement crsElem = crsNodeList.at( 0 ).toElement();
mCrs.readXml( crsElem );
}
else
{
mCrs = QgsCoordinateReferenceSystem();
}
//map rotation
mMapRotation = itemElem.attribute( QStringLiteral( "mapRotation" ), QStringLiteral( "0" ) ).toDouble();
mEvaluatedMapRotation = mMapRotation;
// follow map theme
mFollowVisibilityPreset = itemElem.attribute( QStringLiteral( "followPreset" ) ).compare( QLatin1String( "true" ) ) == 0;
mFollowVisibilityPresetName = itemElem.attribute( QStringLiteral( "followPresetName" ) );
//mKeepLayerSet flag
QString keepLayerSetFlag = itemElem.attribute( QStringLiteral( "keepLayerSet" ) );
if ( keepLayerSetFlag.compare( QLatin1String( "true" ), Qt::CaseInsensitive ) == 0 )
{
mKeepLayerSet = true;
}
else
{
mKeepLayerSet = false;
}
QString drawCanvasItemsFlag = itemElem.attribute( QStringLiteral( "drawCanvasItems" ), QStringLiteral( "true" ) );
if ( drawCanvasItemsFlag.compare( QLatin1String( "true" ), Qt::CaseInsensitive ) == 0 )
{
mDrawAnnotations = true;
}
else
{
mDrawAnnotations = false;
}
mLayerStyleOverrides.clear();
//mLayers
mLayers.clear();
QDomNodeList layerSetNodeList = itemElem.elementsByTagName( QStringLiteral( "LayerSet" ) );
if ( !layerSetNodeList.isEmpty() )
{
QDomElement layerSetElem = layerSetNodeList.at( 0 ).toElement();
QDomNodeList layerIdNodeList = layerSetElem.elementsByTagName( QStringLiteral( "Layer" ) );
mLayers.reserve( layerIdNodeList.size() );
for ( int i = 0; i < layerIdNodeList.size(); ++i )
{
QDomElement layerElem = layerIdNodeList.at( i ).toElement();
QString layerId = layerElem.text();
QString layerName = layerElem.attribute( QStringLiteral( "name" ) );
QString layerSource = layerElem.attribute( QStringLiteral( "source" ) );
QString layerProvider = layerElem.attribute( QStringLiteral( "provider" ) );
QgsMapLayerRef ref( layerId, layerName, layerSource, layerProvider );
ref.resolveWeakly( mLayout->project() );
mLayers << ref;
}
}
// override styles
QDomNodeList layerStylesNodeList = itemElem.elementsByTagName( QStringLiteral( "LayerStyles" ) );
mKeepLayerStyles = !layerStylesNodeList.isEmpty();
if ( mKeepLayerStyles )
{
QDomElement layerStylesElem = layerStylesNodeList.at( 0 ).toElement();
QDomNodeList layerStyleNodeList = layerStylesElem.elementsByTagName( QStringLiteral( "LayerStyle" ) );
for ( int i = 0; i < layerStyleNodeList.size(); ++i )
{
const QDomElement &layerStyleElement = layerStyleNodeList.at( i ).toElement();
QString layerId = layerStyleElement.attribute( QStringLiteral( "layerid" ) );
QString layerName = layerStyleElement.attribute( QStringLiteral( "name" ) );
QString layerSource = layerStyleElement.attribute( QStringLiteral( "source" ) );
QString layerProvider = layerStyleElement.attribute( QStringLiteral( "provider" ) );
QgsMapLayerRef ref( layerId, layerName, layerSource, layerProvider );
ref.resolveWeakly( mLayout->project() );
QgsMapLayerStyle style;
style.readXml( layerStyleElement );
mLayerStyleOverrides.insert( ref.layerId, style.xmlData() );
}
}
mDrawing = false;
mNumCachedLayers = 0;
mCacheInvalidated = true;
//overviews
mOverviewStack->readXml( itemElem, doc, context );
//grids
mGridStack->readXml( itemElem, doc, context );
//atlas
QDomNodeList atlasNodeList = itemElem.elementsByTagName( QStringLiteral( "AtlasMap" ) );
if ( !atlasNodeList.isEmpty() )
{
QDomElement atlasElem = atlasNodeList.at( 0 ).toElement();
mAtlasDriven = ( atlasElem.attribute( QStringLiteral( "atlasDriven" ), QStringLiteral( "0" ) ) != QLatin1String( "0" ) );
if ( atlasElem.hasAttribute( QStringLiteral( "fixedScale" ) ) ) // deprecated XML
{
mAtlasScalingMode = ( atlasElem.attribute( QStringLiteral( "fixedScale" ), QStringLiteral( "0" ) ) != QLatin1String( "0" ) ) ? Fixed : Auto;
}
else if ( atlasElem.hasAttribute( QStringLiteral( "scalingMode" ) ) )
{
mAtlasScalingMode = static_cast<AtlasScalingMode>( atlasElem.attribute( QStringLiteral( "scalingMode" ) ).toInt() );
}
mAtlasMargin = atlasElem.attribute( QStringLiteral( "margin" ), QStringLiteral( "0.1" ) ).toDouble();
}
setLabelMargin( QgsLayoutMeasurement::decodeMeasurement( itemElem.attribute( QStringLiteral( "labelMargin" ), QStringLiteral( "0" ) ) ) );
mMapFlags = static_cast< MapItemFlags>( itemElem.attribute( QStringLiteral( "mapFlags" ), nullptr ).toInt() );
// label blocking items
mBlockingLabelItems.clear();
mBlockingLabelItemUuids.clear();
QDomNodeList labelBlockingNodeList = itemElem.elementsByTagName( QStringLiteral( "labelBlockingItems" ) );
if ( !labelBlockingNodeList.isEmpty() )
{
QDomElement blockingItems = labelBlockingNodeList.at( 0 ).toElement();
QDomNodeList labelBlockingNodeList = blockingItems.childNodes();
for ( int i = 0; i < labelBlockingNodeList.size(); ++i )
{
const QDomElement &itemBlockingElement = labelBlockingNodeList.at( i ).toElement();
const QString itemUuid = itemBlockingElement.attribute( QStringLiteral( "uuid" ) );
mBlockingLabelItemUuids << itemUuid;
}
}
mAtlasClippingSettings->readXml( itemElem, doc, context );
updateBoundingRect();
//temporal settings
setIsTemporal( itemElem.attribute( QStringLiteral( "isTemporal" ) ).toInt() );
if ( isTemporal() )
{
QDateTime begin = QDateTime::fromString( itemElem.attribute( QStringLiteral( "temporalRangeBegin" ) ), Qt::ISODate );
QDateTime end = QDateTime::fromString( itemElem.attribute( QStringLiteral( "temporalRangeEnd" ) ), Qt::ISODate );
setTemporalRange( QgsDateTimeRange( begin, end ) );
}
mUpdatesEnabled = true;
return true;
}
void QgsLayoutItemMap::paint( QPainter *painter, const QStyleOptionGraphicsItem *style, QWidget * )
{
if ( !mLayout || !painter || !painter->device() || !mUpdatesEnabled )
{
return;
}
if ( !shouldDrawItem() )
{
return;
}
QRectF thisPaintRect = rect();
if ( qgsDoubleNear( thisPaintRect.width(), 0.0 ) || qgsDoubleNear( thisPaintRect.height(), 0 ) )
return;
//TODO - try to reduce the amount of duplicate code here!
if ( mLayout->renderContext().isPreviewRender() )
{
painter->save();
painter->setClipRect( thisPaintRect );
if ( !mCacheFinalImage || mCacheFinalImage->isNull() )
{
// No initial render available - so draw some preview text alerting user
painter->setBrush( QBrush( QColor( 125, 125, 125, 125 ) ) );
painter->drawRect( thisPaintRect );
painter->setBrush( Qt::NoBrush );
QFont messageFont;
messageFont.setPointSize( 12 );
painter->setFont( messageFont );
painter->setPen( QColor( 255, 255, 255, 255 ) );
painter->drawText( thisPaintRect, Qt::AlignCenter | Qt::AlignHCenter, tr( "Rendering map" ) );
if ( mPainterJob && mCacheInvalidated && !mDrawingPreview )
{
// current job was invalidated - start a new one
mPreviewScaleFactor = QgsLayoutUtils::scaleFactorFromItemStyle( style );
mBackgroundUpdateTimer->start( 1 );
}
else if ( !mPainterJob && !mDrawingPreview )
{
// this is the map's very first paint - trigger a cache update
mPreviewScaleFactor = QgsLayoutUtils::scaleFactorFromItemStyle( style );
mBackgroundUpdateTimer->start( 1 );
}
}
else
{
if ( mCacheInvalidated && !mDrawingPreview )
{
// cache was invalidated - trigger a background update
mPreviewScaleFactor = QgsLayoutUtils::scaleFactorFromItemStyle( style );
mBackgroundUpdateTimer->start( 1 );
}
//Background color is already included in cached image, so no need to draw
double imagePixelWidth = mCacheFinalImage->width(); //how many pixels of the image are for the map extent?
double scale = rect().width() / imagePixelWidth;
painter->save();
painter->translate( mLastRenderedImageOffsetX + mXOffset, mLastRenderedImageOffsetY + mYOffset );
painter->scale( scale, scale );
painter->drawImage( 0, 0, *mCacheFinalImage );
//restore rotation
painter->restore();
}
painter->setClipRect( thisPaintRect, Qt::NoClip );
mOverviewStack->drawItems( painter, false );
mGridStack->drawItems( painter );
drawAnnotations( painter );
drawMapFrame( painter );
painter->restore();
}
else
{
if ( mDrawing )
return;
mDrawing = true;
QPaintDevice *paintDevice = painter->device();
if ( !paintDevice )
return;
QgsRectangle cExtent = extent();
QSizeF size( cExtent.width() * mapUnitsToLayoutUnits(), cExtent.height() * mapUnitsToLayoutUnits() );
if ( containsAdvancedEffects() && ( !mLayout || !( mLayout->renderContext().flags() & QgsLayoutRenderContext::FlagForceVectorOutput ) ) )
{
// rasterize
double destinationDpi = QgsLayoutUtils::scaleFactorFromItemStyle( style ) * 25.4;
double layoutUnitsInInches = mLayout ? mLayout->convertFromLayoutUnits( 1, QgsUnitTypes::LayoutInches ).length() : 1;
int widthInPixels = static_cast< int >( std::round( boundingRect().width() * layoutUnitsInInches * destinationDpi ) );
int heightInPixels = static_cast< int >( std::round( boundingRect().height() * layoutUnitsInInches * destinationDpi ) );
QImage image = QImage( widthInPixels, heightInPixels, QImage::Format_ARGB32 );
image.fill( Qt::transparent );
image.setDotsPerMeterX( static_cast< int >( std::round( 1000 * destinationDpi / 25.4 ) ) );
image.setDotsPerMeterY( static_cast< int >( std::round( 1000 * destinationDpi / 25.4 ) ) );
double dotsPerMM = destinationDpi / 25.4;
QPainter p( &image );
QPointF tl = -boundingRect().topLeft();
QRect imagePaintRect( static_cast< int >( std::round( tl.x() * dotsPerMM ) ),
static_cast< int >( std::round( tl.y() * dotsPerMM ) ),
static_cast< int >( std::round( thisPaintRect.width() * dotsPerMM ) ),
static_cast< int >( std::round( thisPaintRect.height() * dotsPerMM ) ) );
p.setClipRect( imagePaintRect );
p.translate( imagePaintRect.topLeft() );
// Fill with background color - must be drawn onto the flattened image
// so that layers with opacity or blend modes can correctly interact with it
if ( shouldDrawPart( Background ) )
{
p.scale( dotsPerMM, dotsPerMM );
drawMapBackground( &p );
p.scale( 1.0 / dotsPerMM, 1.0 / dotsPerMM );
}
drawMap( &p, cExtent, imagePaintRect.size(), image.logicalDpiX() );
// important - all other items, overviews, grids etc must be rendered to the
// flattened image, in case these have blend modes must need to interact
// with the map
p.scale( dotsPerMM, dotsPerMM );
if ( shouldDrawPart( OverviewMapExtent ) )
{
mOverviewStack->drawItems( &p, false );
}
if ( shouldDrawPart( Grid ) )
{
mGridStack->drawItems( &p );
}
drawAnnotations( &p );
painter->save();
painter->scale( 1 / dotsPerMM, 1 / dotsPerMM ); // scale painter from mm to dots
painter->drawImage( QPointF( -tl.x()* dotsPerMM, -tl.y() * dotsPerMM ), image );
painter->scale( dotsPerMM, dotsPerMM );
painter->restore();
}
else
{
// Fill with background color
if ( shouldDrawPart( Background ) )
{
drawMapBackground( painter );
}
painter->save();
painter->setClipRect( thisPaintRect );
if ( shouldDrawPart( Layer ) && !qgsDoubleNear( size.width(), 0.0 ) && !qgsDoubleNear( size.height(), 0.0 ) )
{
painter->save();
painter->translate( mXOffset, mYOffset );