qgsvectorlayerlabeling.h

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/***************************************************************************
    qgsvectorlayerlabeling.h
    ---------------------
    begin                : September 2015
    copyright            : (C) 2015 by Martin Dobias
    email                : wonder dot sk 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.                                   *
 *                                                                         *
 ***************************************************************************/
#ifndef QGSVECTORLAYERLABELING_H
#define QGSVECTORLAYERLABELING_H

#include <QString>
#include <QStringList>

class QDomDocument;
class QDomElement;

class QgsPalLayerSettings;
class QgsVectorLayer;
class QgsVectorLayerLabelProvider;

class CORE_EXPORT QgsAbstractVectorLayerLabeling
{
  public:

    virtual ~QgsAbstractVectorLayerLabeling();

    virtual QString type() const = 0;

    virtual QgsVectorLayerLabelProvider* provider( QgsVectorLayer* layer ) const = 0;

    virtual QDomElement save( QDomDocument& doc ) const = 0;

    virtual QStringList subProviders() const { return QStringList( QString() ); }

    virtual QgsPalLayerSettings settings( QgsVectorLayer* layer, const QString& providerId = QString() ) const = 0;

    // static stuff

    static QgsAbstractVectorLayerLabeling* create( const QDomElement& element );
};

class CORE_EXPORT QgsVectorLayerSimpleLabeling : public QgsAbstractVectorLayerLabeling
{
  public:

    virtual QString type() const override;
    virtual QgsVectorLayerLabelProvider* provider( QgsVectorLayer* layer ) const override;
    virtual QDomElement save( QDomDocument& doc ) const override;
    virtual QgsPalLayerSettings settings( QgsVectorLayer* layer, const QString& providerId = QString() ) const override;
};

#endif // QGSVECTORLAYERLABELING_H