20#include <QDomDocument>
25 , mDocument( new QTextDocument( QString() ) )
27 mDocument->setUseDesignMetrics(
true );
34 c->setDocument( mDocument.get() );
40 return mDocument.get();
46 mDocument.reset( doc->clone() );
54 QPainter *painter = context.
painter();
62 const double scaleFactor = context.
painter()->device()->logicalDpiX() / 96.0;
63 context.
painter()->scale( scaleFactor, scaleFactor );
66 mDocument->setTextWidth( size.width() );
68 QRectF clipRect = QRectF( 0, 0, size.width(), size.height() );
69 if ( painter->hasClipping() )
74 clipRect = clipRect.intersected( painter->clipRegion().boundingRect() );
77 mDocument->drawContents( painter, clipRect );
82 QDomElement annotationElem = doc.createElement( QStringLiteral(
"TextAnnotationItem" ) );
85 annotationElem.setAttribute( QStringLiteral(
"document" ), mDocument->toHtml() );
87 _writeXml( annotationElem, doc, context );
88 elem.appendChild( annotationElem );
93 mDocument.reset(
new QTextDocument );
94 mDocument->setHtml( itemElem.attribute( QStringLiteral(
"document" ), QString() ) );
95 const QDomElement annotationElem = itemElem.firstChildElement( QStringLiteral(
"AnnotationItem" ) );
96 if ( !annotationElem.isNull() )
Abstract base class for annotation items which are drawn over a map.
void appearanceChanged()
Emitted whenever the annotation's appearance changes.
void _writeXml(QDomElement &itemElem, QDomDocument &doc, const QgsReadWriteContext &context) const
Writes common annotation properties to a DOM element.
void _readXml(const QDomElement &annotationElem, const QgsReadWriteContext &context)
Reads common annotation properties from a DOM element.
void copyCommonProperties(QgsAnnotation *target) const
Copies common annotation properties to the targe annotation.
bool isCanceled() const
Tells whether the operation has been canceled already.
The class is used as a container of context for various read/write operations on other objects.
Contains information about the context of a rendering operation.
QPainter * painter()
Returns the destination QPainter for the render operation.
QgsFeedback * feedback() const
Returns the feedback object that can be queried regularly during rendering to check if rendering shou...
Scoped object for saving and restoring a QPainter object's state.
An annotation item that displays formatted text from a QTextDocument document.
QgsTextAnnotation * clone() const override
Clones the annotation, returning a new copy of the annotation reflecting the annotation's current sta...
void writeXml(QDomElement &elem, QDomDocument &doc, const QgsReadWriteContext &context) const override
Writes the annotation state to a DOM element.
void readXml(const QDomElement &itemElem, const QgsReadWriteContext &context) override
Restores the annotation's state from a DOM element.
const QTextDocument * document() const
Returns the text document which will be rendered within the annotation.
void renderAnnotation(QgsRenderContext &context, QSizeF size) const override
Renders the annotation's contents to a target /a context at the specified /a size.
void setDocument(const QTextDocument *doc)
Sets the text document which will be rendered within the annotation.
QgsTextAnnotation(QObject *parent=nullptr)
Constructor for QgsTextAnnotation.
As part of the API refactoring and improvements which landed in the Processing API was substantially reworked from the x version This was done in order to allow much of the underlying Processing framework to be ported into c