qgslocator.h

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/***************************************************************************
                         qgslocator.h
                         ------------
    begin                : May 2017
    copyright            : (C) 2017 by Nyall Dawson
    email                : nyall dot dawson 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 QGSLOCATOR_H
#define QGSLOCATOR_H

#include <QObject>
#include <QFuture>
#include <QFutureWatcher>
#include <QMap>
#include <memory>

#include "qgis_core.h"
#include "qgis_sip.h"
#include "qgslocatorfilter.h"
#include "qgsfeedback.h"
#include "qgslocatorcontext.h"


class CORE_EXPORT QgsLocator : public QObject
{
    Q_OBJECT

  public:

    static const QList<QString> CORE_FILTERS;

    QgsLocator( QObject *parent SIP_TRANSFERTHIS = nullptr );

    ~QgsLocator() override;

    void registerFilter( QgsLocatorFilter *filter SIP_TRANSFER );

    void deregisterFilter( QgsLocatorFilter *filter );

    QList< QgsLocatorFilter *> filters( const QString &prefix = QString() );

    Q_DECL_DEPRECATED QMap<QString, QgsLocatorFilter *> prefixedFilters() const;

    void fetchResults( const QString &string, const QgsLocatorContext &context, QgsFeedback *feedback = nullptr );

    void cancel();

    void cancelWithoutBlocking();

    bool isRunning() const;

    void clearPreviousResults();

  signals:

    void foundResult( const QgsLocatorResult &result );

    void finished();

  private slots:

    void filterSentResult( QgsLocatorResult result );

  private:

    QgsFeedback *mFeedback = nullptr;
    std::unique_ptr< QgsFeedback > mOwnedFeedback;

    QList< QgsLocatorFilter * > mFilters;
    QList< QThread * > mActiveThreads;

    void cancelRunningQuery();

};

#endif // QGSLOCATOR_H