QGIS API Documentation 3.40.0-Bratislava (b56115d8743)
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qgsannotationmanager.h
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1/***************************************************************************
2 qgsannotationmanager.h
3 ----------------------
4 Date : January 2017
5 Copyright : (C) 2017 Nyall Dawson
6 Email : nyall dot dawson at gmail dot com
7 ***************************************************************************
8 * *
9 * This program is free software; you can redistribute it and/or modify *
10 * it under the terms of the GNU General Public License as published by *
11 * the Free Software Foundation; either version 2 of the License, or *
12 * (at your option) any later version. *
13 * *
14 ***************************************************************************/
15
16#ifndef QGSANNOTATIONMANAGER_H
17#define QGSANNOTATIONMANAGER_H
18
19#include "qgis_core.h"
20#include "qgis.h"
21#include <QObject>
22#include <QDomElement>
23
25class QgsProject;
26class QgsAnnotation;
31
46class CORE_EXPORT QgsAnnotationManager : public QObject
47{
48 Q_OBJECT
49
50 public:
51
56 explicit QgsAnnotationManager( QgsProject *project SIP_TRANSFERTHIS = nullptr );
57
58 ~QgsAnnotationManager() override;
59
66 bool addAnnotation( QgsAnnotation *annotation SIP_TRANSFER );
67
77 bool removeAnnotation( QgsAnnotation *annotation );
78
83 void clear();
84
89 QList< QgsAnnotation * > annotations() const;
90
97 QList< QgsAnnotation * > cloneAnnotations() const SIP_FACTORY;
98
104 bool readXml( const QDomElement &element, const QgsReadWriteContext &context );
105
118 bool readXmlAndUpgradeToAnnotationLayerItems( const QDomElement &element, const QgsReadWriteContext &context,
119 QgsAnnotationLayer *layer, const QgsCoordinateTransformContext &transformContext ) SIP_SKIP;
120
125 QDomElement writeXml( QDomDocument &doc, const QgsReadWriteContext &context ) const;
126
136 bool accept( QgsStyleEntityVisitorInterface *visitor ) const;
137
138 signals:
139
141 void annotationAdded( QgsAnnotation *annotation );
142
145
148
149 private:
150
151 bool readXmlPrivate( const QDomElement &element, const QgsReadWriteContext &context, QgsAnnotationLayer *layer, const QgsCoordinateTransformContext &transformContext );
152 static std::unique_ptr< QgsAnnotationItem > convertToAnnotationItem( QgsAnnotation *annotation, QgsAnnotationLayer *layer,
153 const QgsCoordinateTransformContext &transformContext );
154
155 QgsProject *mProject = nullptr;
156
157 QList< QgsAnnotation * > mAnnotations;
158
159 QgsAnnotation *createAnnotationFromXml( const QDomElement &element, const QgsReadWriteContext &context );
160
161};
162
163#endif // QGSANNOTATIONMANAGER_H
Abstract base class for annotation items which are drawn with QgsAnnotationLayers.
Represents a map layer containing a set of georeferenced annotations, e.g.
Manages storage of a set of QgsAnnotation annotation objects.
void annotationRemoved()
Emitted when an annotation was removed from the manager.
void annotationAboutToBeRemoved(QgsAnnotation *annotation)
Emitted when an annotation is about to be removed from the manager.
void annotationAdded(QgsAnnotation *annotation)
Emitted when a annotation has been added to the manager.
Abstract base class for annotation items which are drawn over a map.
Contains information about the context in which a coordinate transform is executed.
Encapsulates a QGIS project, including sets of map layers and their styles, layouts,...
Definition qgsproject.h:107
The class is used as a container of context for various read/write operations on other objects.
An interface for classes which can visit style entity (e.g.
#define SIP_TRANSFERTHIS
Definition qgis_sip.h:53
#define SIP_SKIP
Definition qgis_sip.h:126
#define SIP_TRANSFER
Definition qgis_sip.h:36
#define SIP_FACTORY
Definition qgis_sip.h:76