qgsvectorlayertemporalproperties.h

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/***************************************************************************
                         qgsvectorlayertemporalproperties.h
                         ---------------
    begin                : May 2020
    copyright            : (C) 2020 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 QGSVECTORLAYERTEMPORALPROPERTIES_H
#define QGSVECTORLAYERTEMPORALPROPERTIES_H
 
#include "qgis_core.h"
#include "qgis_sip.h"
#include "qgsrange.h"
#include "qgsmaplayertemporalproperties.h"
#include "qgsrasterdataprovidertemporalcapabilities.h"
#include "qgsunittypes.h"
 
class QgsVectorLayer;
class QgsFields;
 
class CORE_EXPORT QgsVectorLayerTemporalContext
{
  public:
 
    QgsVectorLayer *layer() const;
 
    void setLayer( QgsVectorLayer *layer );
 
  private:
 
    QgsVectorLayer *mLayer = nullptr;
};
 
class CORE_EXPORT QgsVectorLayerTemporalProperties : public QgsMapLayerTemporalProperties
{
    Q_OBJECT
 
  public:
 
    QgsVectorLayerTemporalProperties( QObject *parent SIP_TRANSFERTHIS = nullptr, bool enabled = false );
 
    bool isVisibleInTemporalRange( const QgsDateTimeRange &range ) const override;
    QgsDateTimeRange calculateTemporalExtent( QgsMapLayer *layer ) const override SIP_SKIP;
 
    enum TemporalMode
    {
      ModeFixedTemporalRange = 0, 
      ModeFeatureDateTimeInstantFromField, 
      ModeFeatureDateTimeStartAndEndFromFields, 
      ModeFeatureDateTimeStartAndDurationFromFields, 
      ModeFeatureDateTimeStartAndEndFromExpressions, 
      ModeRedrawLayerOnly, 
    };
 
    TemporalMode mode() const;
 
    void setMode( TemporalMode mode );
 
    QgsTemporalProperty::Flags flags() const override;
 
    void setFixedTemporalRange( const QgsDateTimeRange &range );
 
    const QgsDateTimeRange &fixedTemporalRange() const;
 
    QString startField() const;
 
    void setStartField( const QString &field );
 
    QString endField() const;
 
    void setEndField( const QString &field );
 
    QString startExpression() const;
 
    void setStartExpression( const QString &expression );
 
    QString endExpression() const;
 
    void setEndExpression( const QString &endExpression );
 
    QString durationField() const;
 
    void setDurationField( const QString &field );
 
    QgsUnitTypes::TemporalUnit durationUnits() const;
 
    void setDurationUnits( QgsUnitTypes::TemporalUnit units );
 
    double fixedDuration() const;
 
    void setFixedDuration( double duration );
 
    bool accumulateFeatures() const;
 
    void setAccumulateFeatures( bool accumulate );
 
    QString createFilterString( const QgsVectorLayerTemporalContext &context, const QgsDateTimeRange &range ) const;
 
    void guessDefaultsFromFields( const QgsFields &fields );
 
    QDomElement writeXml( QDomElement &element, QDomDocument &doc, const QgsReadWriteContext &context ) override;
    bool readXml( const QDomElement &element, const QgsReadWriteContext &context ) override;
    void setDefaultsFromDataProviderTemporalCapabilities( const QgsDataProviderTemporalCapabilities *capabilities ) override;
 
  private:
 
    TemporalMode mMode = ModeFixedTemporalRange;
 
    QgsDateTimeRange mFixedRange;
 
    QString mStartFieldName;
    QString mEndFieldName;
    QString mDurationFieldName;
    QgsUnitTypes::TemporalUnit mDurationUnit = QgsUnitTypes::TemporalMinutes;
 
    double mFixedDuration = 0;
 
    bool mAccumulateFeatures = false;
 
    QString mStartExpression;
    QString mEndExpression;
 
};
 
#endif // QGSVECTORLAYERTEMPORALPROPERTIES_H