qgsquickidentifykit.h

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/***************************************************************************
  qgsquickidentifykit.h
 ---------------------
  Date                 : 30.8.2016
  Copyright            : (C) 2016 by Matthias Kuhn
  Email                : matthias (at) 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 QGSQUICKIDENTIFYKIT_H
#define QGSQUICKIDENTIFYKIT_H

#include <QObject>
#include <QPair>

#include "qgsfeature.h"
#include "qgsmapsettings.h"
#include "qgspoint.h"
#include "qgsrendercontext.h"

#include "qgis_quick.h"
#include "qgsquickfeaturelayerpair.h"

class QgsMapLayer;
class QgsQuickMapSettings;
class QgsVectorLayer;

class QUICK_EXPORT QgsQuickIdentifyKit : public QObject
{
    Q_OBJECT

    Q_PROPERTY( QgsQuickMapSettings *mapSettings READ mapSettings WRITE setMapSettings NOTIFY mapSettingsChanged )

    
    Q_PROPERTY( double searchRadiusMm READ searchRadiusMm WRITE setSearchRadiusMm NOTIFY searchRadiusMmChanged )

    Q_PROPERTY( int featuresLimit READ featuresLimit WRITE setFeaturesLimit NOTIFY featuresLimitChanged )

    Q_PROPERTY( IdentifyMode identifyMode MEMBER mIdentifyMode NOTIFY identifyModeChanged )

  public:

    enum IdentifyMode
    {

      TopDownAll = 0,

      TopDownStopAtFirst
    };
    Q_ENUM( IdentifyMode )

    
    explicit QgsQuickIdentifyKit( QObject *parent = nullptr );

    QgsQuickMapSettings *mapSettings() const;

    void setMapSettings( QgsQuickMapSettings *mapSettings );

    double searchRadiusMm() const;

    void setSearchRadiusMm( double searchRadiusMm );

    int featuresLimit() const;

    void setFeaturesLimit( int limit );

    Q_INVOKABLE QgsQuickFeatureLayerPair identifyOne( const QPointF &point, QgsVectorLayer *layer = nullptr );

    Q_INVOKABLE QgsQuickFeatureLayerPairs identify( const QPointF &point, QgsVectorLayer *layer = nullptr );

  signals:
    void mapSettingsChanged();
    void searchRadiusMmChanged();
    void featuresLimitChanged();
    void identifyModeChanged();

  private:
    QgsQuickMapSettings *mMapSettings = nullptr; // not owned

    double searchRadiusMU( const QgsRenderContext &context ) const;
    double searchRadiusMU() const;

    QgsRectangle toLayerCoordinates( QgsMapLayer *layer, const QgsRectangle &rect ) const;
    QgsFeatureList identifyVectorLayer( QgsVectorLayer *layer, const QgsPointXY &point ) const;

    double mSearchRadiusMm = 8;
    int mFeaturesLimit = 100;
    IdentifyMode mIdentifyMode = IdentifyMode::TopDownAll;
};

#endif // QGSQUICKIDENTIFYKIT_H