qgssnaptogridcanvasitem.h

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/***************************************************************************
    qgssnaptogridcanvasitem.h
    ----------------------
    begin                : August 2018
    copyright            : (C) Matthias Kuhn
    email                : [email protected]
 ***************************************************************************
 *                                                                         *
 *   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 QGSSNAPTOGRIDCANVASITEM_H
#define QGSSNAPTOGRIDCANVASITEM_H

#include <QObject>
#include <QPen>

#include "qgscoordinatereferencesystem.h"
#include "qgsmapcanvasitem.h"
#include "qgscoordinatetransform.h"

class GUI_EXPORT QgsSnapToGridCanvasItem : public QObject, public QgsMapCanvasItem
{
    Q_OBJECT

  public:

    QgsSnapToGridCanvasItem( QgsMapCanvas *mapCanvas SIP_TRANSFERTHIS );

    void paint( QPainter *painter ) override;

    QgsPointXY point() const;

    void setPoint( const QgsPointXY &point );

    double precision() const;

    void setPrecision( double precision );

    QgsCoordinateReferenceSystem crs() const;

    void setCrs( const QgsCoordinateReferenceSystem &crs );

    bool enabled() const;

    void setEnabled( bool enabled );

  private slots:
    void updateMapCanvasCrs();

    void updateZoomFactor();

  private:
    QPen mGridPen = QPen( QColor( 127, 127, 127, 150 ) );
    QPen mCurrentPointPen = QPen( QColor( 200, 200, 200, 150 ) );

    bool mEnabled = true;
    bool mAvailableByZoomFactor = false;

    double mPrecision = 0.0;
    QgsCoordinateTransform mTransform;
    QgsPointXY mPoint;
};

#endif // QGSSNAPTOGRIDCANVASITEM_H