qgslayertreeembeddedwidgetregistry.h

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/***************************************************************************
  qgslayertreeembeddedwidgetregistry.h
  --------------------------------------
  Date                 : May 2016
  Copyright            : (C) 2016 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 QGSLAYERTREEEMBEDDEDWIDGETREGISTRY_H
#define QGSLAYERTREEEMBEDDEDWIDGETREGISTRY_H

#include <QMap>
#include <QWidget>


class QgsMapLayer;

class GUI_EXPORT QgsLayerTreeEmbeddedWidgetProvider
{
  public:
    virtual ~QgsLayerTreeEmbeddedWidgetProvider() {}

    virtual QString id() const = 0;

    virtual QString name() const = 0;

    virtual QWidget* createWidget( QgsMapLayer* layer, int widgetIndex ) = 0;

    virtual bool supportsLayer( QgsMapLayer* layer ) = 0;
};

class GUI_EXPORT QgsLayerTreeEmbeddedWidgetRegistry
{
  public:

    static QgsLayerTreeEmbeddedWidgetRegistry* instance();

    ~QgsLayerTreeEmbeddedWidgetRegistry();

    QStringList providers() const;

    QgsLayerTreeEmbeddedWidgetProvider* provider( const QString& providerId ) const;

    bool addProvider( QgsLayerTreeEmbeddedWidgetProvider* provider );

    bool removeProvider( const QString& providerId );

  protected:
    QgsLayerTreeEmbeddedWidgetRegistry();

    QMap<QString, QgsLayerTreeEmbeddedWidgetProvider*> mProviders;
};


#endif // QGSLAYERTREEEMBEDDEDWIDGETREGISTRY_H