qgsquickelevationprofilecanvas.h

Go to the documentation of this file.

/***************************************************************************
                          qgselevationprofilecanvas.h
                          ---------------
    begin                : October 2022
    copyright            : (C) 2022 by Mathieu Pellerin
    email                : mathieu at opengis dot 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 QGSELEVATIONPROFILECANVAS_H
#define QGSELEVATIONPROFILECANVAS_H
 
#include "qgis_quick.h"
#include "qgscoordinatereferencesystem.h"
#include "qgsgeometry.h"
#include "qgsmaplayer.h"
#include "qgsproject.h"
 
#include <QQuickItem>
 
class QgsProfilePlotRenderer;
class QgsElevationProfilePlotItem;

class QUICK_EXPORT QgsQuickElevationProfileCanvas : public QQuickItem
{
    Q_OBJECT
 
    Q_PROPERTY( QgsProject *project READ project WRITE setProject NOTIFY projectChanged )
 
    Q_PROPERTY( QgsCoordinateReferenceSystem crs READ crs WRITE setCrs NOTIFY crsChanged )
 
    Q_PROPERTY( QgsGeometry profileCurve READ profileCurve WRITE setProfileCurve NOTIFY profileCurveChanged )
 
    Q_PROPERTY( double tolerance READ tolerance WRITE setTolerance NOTIFY toleranceChanged )

    Q_PROPERTY( bool isRendering READ isRendering NOTIFY isRenderingChanged )
 
  public:

    explicit QgsQuickElevationProfileCanvas( QQuickItem *parent = nullptr );
    ~QgsQuickElevationProfileCanvas();
 
    QSGNode *updatePaintNode( QSGNode *oldNode, QQuickItem::UpdatePaintNodeData * ) override;

    void cancelJobs();

    bool isRendering() const;

    Q_INVOKABLE void refresh();

    QgsProject *project() const { return mProject; }

    void setProject( QgsProject *project );

    Q_INVOKABLE void populateLayersFromProject();

    QList<QgsMapLayer *> layers() const;

    QgsCoordinateReferenceSystem crs() const { return mCrs; }

    void setCrs( const QgsCoordinateReferenceSystem &crs );

    void setProfileCurve( QgsGeometry curve );

    QgsGeometry profileCurve() const { return mProfileCurve; };

    void setTolerance( double tolerance );

    double tolerance() const { return mTolerance; }

    void setVisiblePlotRange( double minimumDistance, double maximumDistance, double minimumElevation, double maximumElevation );

    QgsDoubleRange visibleDistanceRange() const;

    QgsDoubleRange visibleElevationRange() const;
 
  signals:

    void activeJobCountChanged( int count );

    void projectChanged();

    void crsChanged();

    void profileCurveChanged();

    void toleranceChanged();

    void isRenderingChanged();
 
  protected:
#if QT_VERSION < QT_VERSION_CHECK( 6, 0, 0 )
    void geometryChanged( const QRectF &newGeometry, const QRectF &oldGeometry ) override;
#else
    void geometryChange( const QRectF &newGeometry, const QRectF &oldGeometry ) override;
#endif
 
  public slots:

    Q_INVOKABLE void zoomFull();

    Q_INVOKABLE void zoomFullInRatio();

    Q_INVOKABLE void clear();
 
  private slots:
 
    void generationFinished();
    void onLayerProfileGenerationPropertyChanged();
    void onLayerProfileRendererPropertyChanged();
    void regenerateResultsForLayer();
    void scheduleDeferredRegeneration();
    void scheduleDeferredRedraw();
    void startDeferredRegeneration();
    void startDeferredRedraw();
    void refineResults();
 
  private:
    void setupLayerConnections( QgsMapLayer *layer, bool isDisconnect );
 
    QgsCoordinateReferenceSystem mCrs;
    QgsProject *mProject = nullptr;
 
    QgsWeakMapLayerPointerList mLayers;
 
    QImage mImage;
 
    QgsElevationProfilePlotItem *mPlotItem = nullptr;
    QgsProfilePlotRenderer *mCurrentJob = nullptr;
 
    QTimer *mDeferredRegenerationTimer = nullptr;
    bool mDeferredRegenerationScheduled = false;
    QTimer *mDeferredRedrawTimer = nullptr;
    bool mDeferredRedrawScheduled = false;
 
    QgsGeometry mProfileCurve;
    double mTolerance = 0;
 
    bool mZoomFullWhenJobFinished = true;
 
    bool mForceRegenerationAfterCurrentJobCompletes = false;
 
    static constexpr double MAX_ERROR_PIXELS = 2;
 
    bool mDirty = false;
};
 
#endif // QGSELEVATIONPROFILECANVAS_H