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38ef62e1cc
Previously, annotation size and position always used pixel units. This did not work well when exporting layouts, resulting in tiny annotations (it also caused issues when moving projects between hidpi/non hidpi displays). Instead, use millimeters for annotation size and position so that the appearance is consistent across displays and works correctly in layout exports. Add lots of unit tests covering this. Fixes #18373
102 lines
3.5 KiB
C++
102 lines
3.5 KiB
C++
/***************************************************************************
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qgstextannotation.cpp
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------------------------
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begin : February 9, 2010
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copyright : (C) 2010 by Marco Hugentobler
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email : marco dot hugentobler at hugis dot net
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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 "qgstextannotation.h"
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#include <QDomDocument>
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#include <QPainter>
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QgsTextAnnotation::QgsTextAnnotation( QObject *parent )
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: QgsAnnotation( parent )
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, mDocument( new QTextDocument( QString() ) )
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{
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mDocument->setUseDesignMetrics( true );
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}
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QgsTextAnnotation *QgsTextAnnotation::clone() const
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{
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std::unique_ptr< QgsTextAnnotation > c( new QgsTextAnnotation() );
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copyCommonProperties( c.get() );
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c->setDocument( mDocument.get() );
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return c.release();
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}
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const QTextDocument *QgsTextAnnotation::document() const
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{
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return mDocument.get();
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}
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void QgsTextAnnotation::setDocument( const QTextDocument *doc )
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{
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if ( doc )
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mDocument.reset( doc->clone() );
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else
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mDocument.reset();
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emit appearanceChanged();
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}
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void QgsTextAnnotation::renderAnnotation( QgsRenderContext &context, QSizeF size ) const
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{
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QPainter *painter = context.painter();
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if ( !mDocument )
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{
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return;
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}
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// scale painter back to 96 dpi, so layout prints match screen rendering
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context.painter()->save();
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const double scaleFactor = context.painter()->device()->logicalDpiX() / 96.0;
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context.painter()->scale( scaleFactor, scaleFactor );
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size /= scaleFactor;
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mDocument->setTextWidth( size.width() );
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QRectF clipRect = QRectF( 0, 0, size.width(), size.height() );
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if ( painter->hasClipping() )
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{
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//QTextDocument::drawContents will draw text outside of the painter's clip region
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//when it is passed a clip rectangle. So, we need to intersect it with the
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//painter's clip region to prevent text drawn outside clipped region (e.g., outside layout maps, see #10400)
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clipRect = clipRect.intersected( painter->clipRegion().boundingRect() );
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}
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//draw text document
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mDocument->drawContents( painter, clipRect );
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painter->restore();
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}
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void QgsTextAnnotation::writeXml( QDomElement &elem, QDomDocument &doc, const QgsReadWriteContext &context ) const
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{
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QDomElement annotationElem = doc.createElement( QStringLiteral( "TextAnnotationItem" ) );
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if ( mDocument )
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{
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annotationElem.setAttribute( QStringLiteral( "document" ), mDocument->toHtml() );
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}
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_writeXml( annotationElem, doc, context );
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elem.appendChild( annotationElem );
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}
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void QgsTextAnnotation::readXml( const QDomElement &itemElem, const QgsReadWriteContext &context )
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{
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mDocument.reset( new QTextDocument );
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mDocument->setHtml( itemElem.attribute( QStringLiteral( "document" ), QString() ) );
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QDomElement annotationElem = itemElem.firstChildElement( QStringLiteral( "AnnotationItem" ) );
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if ( !annotationElem.isNull() )
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{
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_readXml( annotationElem, context );
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}
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}
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