qgslocatormodelbridge.h

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/***************************************************************************
                         qgslocatormodelbridge.h
                         ------------------
    begin                : November 2018
    copyright            : (C) 2018 by Denis Rouzaud
    email                : denis@opengis.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 QGSLOCATORMODELBRIDGE_H
#define QGSLOCATORMODELBRIDGE_H
 
#include "qgis_core.h"
#include "qgscoordinatereferencesystem.h"
#include "qgscoordinatetransformcontext.h"
#include "qgsrectangle.h"
 
#include <QObject>
 
class QItemSelection;
 
class QgsLocatorResult;
class QgsLocator;
class QgsLocatorContext;
class QgsLocatorModel;
class QgsLocatorProxyModel;
 

class CORE_EXPORT QgsLocatorModelBridge : public QObject
{
    Q_OBJECT
    Q_PROPERTY( bool isRunning READ isRunning NOTIFY isRunningChanged )
  public:
    explicit QgsLocatorModelBridge( QObject *parent = nullptr );
    ~QgsLocatorModelBridge() override = default;

    Q_INVOKABLE void performSearch( const QString &text );

    QgsLocator *locator() const;

    Q_INVOKABLE QgsLocatorProxyModel *proxyModel() const;

    bool hasQueueRequested() const;

    bool isRunning() const;

    void triggerResult( const QModelIndex &index, const int actionId = -1 );

    QgsCoordinateTransformContext transformContext() const { return mTransformContext; }

    void setTransformContext( const QgsCoordinateTransformContext &context ) { mTransformContext = context; }
 
  signals:
    void resultAdded();

    void isRunningChanged();

    void resultsCleared();
 
  public slots:
    void invalidateResults();

    void updateCanvasExtent( const QgsRectangle &extent );

    void updateCanvasCrs( const QgsCoordinateReferenceSystem &crs );

    void selectionChanged( const QItemSelection &selected, const QItemSelection &deselected );
 
  private slots:
    void searchFinished();
    void addResult( const QgsLocatorResult &result );
 
  private:
    QgsLocatorContext createContext();
    void setIsRunning( bool isRunning );
 
    QgsLocator *mLocator = nullptr;
    QgsLocatorModel *mLocatorModel = nullptr;
    QgsLocatorProxyModel *mProxyModel = nullptr;
 
    QString mNextRequestedString;
    bool mHasQueuedRequest = false;
    bool mIsRunning = false;
 
    // keep track of map canvas extent and CRS
    // if much if needed, it would be possible to add
    // a QgsMapCanvasController in core to achieve this
    // see discussion in https://github.com/qgis/QGIS/pull/8404
    QgsRectangle mCanvasExtent;
    QgsCoordinateReferenceSystem mCanvasCrs;
    QgsCoordinateTransformContext mTransformContext;
};
 
#endif // QGSLOCATORMODELBRIDGE_H