qgsannotationlayer.h

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/***************************************************************************
    qgsannotationlayer.h
    ----------------
    copyright            : (C) 2019 by Sandro Mani
    email                : smani at sourcepole dot ch
 ***************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/
 
#ifndef QGSANNOTATIONLAYER_H
#define QGSANNOTATIONLAYER_H
 
#include "qgis_core.h"
#include "qgis_sip.h"
#include "qgsmaplayer.h"
#include "qgsmaplayerrenderer.h"
 
class QgsAnnotationItem;
 
 
class CORE_EXPORT QgsAnnotationLayer : public QgsMapLayer
{
    Q_OBJECT
 
  public:
 
    struct LayerOptions
    {
 
      explicit LayerOptions( const QgsCoordinateTransformContext &transformContext )
        : transformContext( transformContext )
      {}
 
      QgsCoordinateTransformContext transformContext;
 
    };
 
 
    QgsAnnotationLayer( const QString &name, const QgsAnnotationLayer::LayerOptions &options );
    ~QgsAnnotationLayer() override;
 
    void reset();
 
    QString addItem( QgsAnnotationItem *item SIP_TRANSFER );
 
    bool removeItem( const QString &id );
 
    void clear();
 
    bool isEmpty() const;
 
    QMap<QString, QgsAnnotationItem *> items() const { return mItems; }
 
    void setOpacity( double opacity );
 
    double opacity() const { return mOpacity; }
 
    QgsAnnotationLayer *clone() const override SIP_FACTORY;
    QgsMapLayerRenderer *createMapRenderer( QgsRenderContext &rendererContext ) override SIP_FACTORY;
    QgsRectangle extent() const override;
    void setTransformContext( const QgsCoordinateTransformContext &context ) override;
    bool readXml( const QDomNode &layerNode, QgsReadWriteContext &context ) override;
    bool writeXml( QDomNode &layer_node, QDomDocument &doc, const QgsReadWriteContext &context ) const override;
    bool writeSymbology( QDomNode &node, QDomDocument &doc, QString &errorMessage, const QgsReadWriteContext &, StyleCategories categories = AllStyleCategories ) const override;
    bool readSymbology( const QDomNode &node, QString &errorMessage, QgsReadWriteContext &context, StyleCategories categories = AllStyleCategories ) override;
 
  private:
    QMap<QString, QgsAnnotationItem *> mItems;
    double mOpacity = 1;
    QgsCoordinateTransformContext mTransformContext;
};
 
#endif // QGSANNOTATIONLAYER_H