qgssnaptogridcanvasitem.h

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/***************************************************************************
    qgssnaptogridcanvasitem.h
    ----------------------
    begin                : August 2018
    copyright            : (C) Matthias Kuhn
    email                : matthias@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 QGSSNAPTOGRIDCANVASITEM_H
#define QGSSNAPTOGRIDCANVASITEM_H
 
#include "qgscoordinatereferencesystem.h"
#include "qgscoordinatetransform.h"
#include "qgsmapcanvasitem.h"
 
#include <QObject>
#include <QPen>
 
#ifdef SIP_RUN
//%ModuleHeaderCode
// For ConvertToSubClassCode.
#include <qgssnaptogridcanvasitem.h>
//%End
#endif

#ifndef SIP_RUN
class GUI_EXPORT QgsSnapToGridCanvasItem : public QObject, public QgsMapCanvasItem
{
#else
class GUI_EXPORT QgsSnapToGridCanvasItem : public QgsMapCanvasItem
{
#endif
 
    Q_OBJECT
 
#ifdef SIP_RUN
    SIP_CONVERT_TO_SUBCLASS_CODE
    if ( dynamic_cast<QgsSnapToGridCanvasItem *>( sipCpp ) )
    {
      sipType = sipType_QgsSnapToGridCanvasItem;
      // We need to tweak the pointer as sip believes it is single inheritance
      // from QgsMapCanvasItem, but the raw address of QgsSnapToGridCanvasItem (sipCpp)
      // is actually a QObject
      *sipCppRet = dynamic_cast<QgsSnapToGridCanvasItem *>( sipCpp );
    }
    else
      sipType = nullptr;
  SIP_END
#endif
 
  public:
    QgsSnapToGridCanvasItem( QgsMapCanvas *mapCanvas SIP_TRANSFERTHIS );
 
    using QgsMapCanvasItem::paint;
    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