qgsmaplayerstylemanager.h

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/***************************************************************************
  qgsmaplayerstylemanager.h
  --------------------------------------
  Date                 : January 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 QGSMAPLAYERSTYLEMANAGER_H
#define QGSMAPLAYERSTYLEMANAGER_H


class QgsMapLayer;

#include <QByteArray>
#include <QMap>
#include <QStringList>
#include <QObject>

class QDomElement;

class CORE_EXPORT QgsMapLayerStyle
{
  public:
    QgsMapLayerStyle();

    explicit QgsMapLayerStyle( const QString& xmlData );

    bool isValid() const;

    void clear();

    QString xmlData() const;

    void readFromLayer( QgsMapLayer* layer );
    void writeToLayer( QgsMapLayer* layer ) const;

    void readXml( const QDomElement& styleElement );
    void writeXml( QDomElement& styleElement ) const;

  private:
    QString mXmlData;
};


class CORE_EXPORT QgsMapLayerStyleManager : public QObject
{
    Q_OBJECT
  public:
    QgsMapLayerStyleManager( QgsMapLayer* layer );

    QgsMapLayer* layer() const { return mLayer; }

    void reset();

    void readXml( const QDomElement& mgrElement );
    void writeXml( QDomElement& mgrElement ) const;

    QStringList styles() const;
    QgsMapLayerStyle style( const QString& name ) const;

    bool addStyle( const QString& name, const QgsMapLayerStyle& style );
    bool addStyleFromLayer( const QString& name );
    bool removeStyle( const QString& name );
    bool renameStyle( const QString& name, const QString& newName );

    QString currentStyle() const;
    bool setCurrentStyle( const QString& name );

    bool setOverrideStyle( const QString& styleDef );
    bool restoreOverrideStyle();

  signals:
    void styleAdded( const QString& name );
    void styleRemoved( const QString& name );
    void styleRenamed( const QString& oldName, const QString& newName );
    void currentStyleChanged( const QString& currentName );

  private:
    QgsMapLayer* mLayer;
    QMap<QString, QgsMapLayerStyle> mStyles;
    QString mCurrentStyle;
    QgsMapLayerStyle* mOverriddenOriginalStyle;
};

#endif // QGSMAPLAYERSTYLEMANAGER_H