qgsmaptool.h

Go to the documentation of this file.

/***************************************************************************
    qgsmaptool.h  -  base class for map canvas tools
    ----------------------
    begin                : January 2006
    copyright            : (C) 2006 by Martin Dobias
    email                : wonder.sk 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 QGSMAPTOOL_H
#define QGSMAPTOOL_H
 
#include "qgsconfig.h"
 
#include "qgis.h"
#include "qgis_gui.h"
 
#include <QCursor>
#include <QGestureEvent>
#include <QObject>
#include <QPointer>
#include <QString>
 
class QgsMapLayer;
class QgsMapCanvas;
class QgsRenderContext;
class QKeyEvent;
class QMouseEvent;
class QWheelEvent;
class QgsPoint;
class QgsPointXY;
class QgsRectangle;
class QPoint;
class QAction;
class QAbstractButton;
class QgsMapMouseEvent;
class QMenu;
 
#ifdef SIP_RUN
//%ModuleHeaderCode
// fix to allow compilation with sip 4.7 that for some reason
// doesn't add these includes to the file where the code from
// ConvertToSubClassCode goes.
#include <qgsmaptoolzoom.h>
#include <qgsmaptoolpan.h>
#include <qgsmaptoolemitpoint.h>
#include <qgsmaptoolidentify.h>
#include <qgsmaptooldigitizefeature.h>
#include <qgsmaptoolextent.h>
#include <qgsmaptoolidentifyfeature.h>
#include <qgsmaptoolcapture.h>
#include <qgsmaptooladvanceddigitizing.h>
#include <qgsmaptooledit.h>
//%End
#endif

class GUI_EXPORT QgsMapTool : public QObject
{
#ifdef SIP_RUN
    SIP_CONVERT_TO_SUBCLASS_CODE
    if ( dynamic_cast<QgsMapToolZoom *>( sipCpp ) != NULL )
      sipType = sipType_QgsMapToolZoom;
    else if ( dynamic_cast<QgsMapToolPan *>( sipCpp ) != NULL )
      sipType = sipType_QgsMapToolPan;
    else if ( dynamic_cast<QgsMapToolEmitPoint *>( sipCpp ) != NULL )
      sipType = sipType_QgsMapToolEmitPoint;
    else if ( dynamic_cast<QgsMapToolExtent *>( sipCpp ) != NULL )
      sipType = sipType_QgsMapToolExtent;
    else if ( dynamic_cast<QgsMapToolIdentifyFeature *>( sipCpp ) != NULL )
      sipType = sipType_QgsMapToolIdentifyFeature;
    else if ( dynamic_cast<QgsMapToolIdentify *>( sipCpp ) != NULL )
      sipType = sipType_QgsMapToolIdentify;
    else if ( dynamic_cast<QgsMapToolDigitizeFeature *>( sipCpp ) != NULL )
      sipType = sipType_QgsMapToolDigitizeFeature;
    else if ( dynamic_cast<QgsMapToolCapture *>( sipCpp ) != NULL )
      sipType = sipType_QgsMapToolCapture;
    else if ( dynamic_cast<QgsMapToolAdvancedDigitizing *>( sipCpp ) != NULL )
      sipType = sipType_QgsMapToolAdvancedDigitizing;
    else if ( dynamic_cast<QgsMapToolEdit *>( sipCpp ) != NULL )
      sipType = sipType_QgsMapToolEdit;
    else if ( sipCpp->inherits( "QgsMapTool" ) ) // e.g. map tools from QGIS app library, which aren't exposed to SIP
      sipType = sipType_QgsMapTool;
    else
      sipType = nullptr;
    SIP_END
#endif
 
    Q_OBJECT
 
  public:
    enum Flag SIP_ENUM_BASETYPE( IntFlag )
    {
      Transient = 1 << 1,       
      EditTool = 1 << 2,        
      AllowZoomRect = 1 << 3,   
      ShowContextMenu = 1 << 4, 
    };
    Q_DECLARE_FLAGS( Flags, Flag )
 
    
    virtual Flags flags() const { return Flags(); }
 
    ~QgsMapTool() override;

    virtual void canvasMoveEvent( QgsMapMouseEvent *e );

    virtual void canvasDoubleClickEvent( QgsMapMouseEvent *e );

    virtual void canvasPressEvent( QgsMapMouseEvent *e );

    virtual void canvasReleaseEvent( QgsMapMouseEvent *e );

    virtual void wheelEvent( QWheelEvent *e );

    virtual void keyPressEvent( QKeyEvent *e );

    virtual void keyReleaseEvent( QKeyEvent *e );

    virtual bool gestureEvent( QGestureEvent *e );

    virtual bool canvasToolTipEvent( QHelpEvent *e );

    virtual bool shortcutEvent( QKeyEvent *e );

    void setAction( QAction *action );

    QAction *action();

    bool isActive() const;

    void setButton( QAbstractButton *button );

    QAbstractButton *button();

    virtual void setCursor( const QCursor &cursor );

    virtual void activate();

    virtual void deactivate();

    virtual void reactivate();

    virtual void clean();

    QgsMapCanvas *canvas() const;

    QString toolName() { return mToolName; }

    static double searchRadiusMM();

    static double searchRadiusMU( const QgsRenderContext &context );

    static double searchRadiusMU( QgsMapCanvas *canvas );

    virtual void populateContextMenu( QMenu *menu );

    virtual bool populateContextMenuWithEvent( QMenu *menu, QgsMapMouseEvent *event );

    QgsPointXY toMapCoordinates( QPoint point );
 
  signals:

    void messageEmitted( const QString &message, Qgis::MessageLevel level = Qgis::MessageLevel::Info );

    void messageDiscarded();

    void activated();

    void deactivated();

    void reactivated();
 
  private slots:
    void actionDestroyed();
 
  protected:
    QgsMapTool( QgsMapCanvas *canvas SIP_TRANSFERTHIS );

    QgsPoint toLayerCoordinates( const QgsMapLayer *layer, const QgsPoint &point ) SIP_PYNAME( toLayerCoordinatesV2 );

    QgsPointXY toLayerCoordinates( const QgsMapLayer *layer, QPoint point );

    QgsPointXY toLayerCoordinates( const QgsMapLayer *layer, const QgsPointXY &point );

    QgsPointXY toMapCoordinates( const QgsMapLayer *layer, const QgsPointXY &point );

    QgsPoint toMapCoordinates( const QgsMapLayer *layer, const QgsPoint &point ) SIP_PYNAME( toMapCoordinatesV2 );

    QgsRectangle toLayerCoordinates( const QgsMapLayer *layer, const QgsRectangle &rect );

    QPoint toCanvasCoordinates( const QgsPointXY &point ) const;

    QgsMapLayer *layer( const QString &id );

    void setToolName( const QString &name );

    QPointer<QgsMapCanvas> mCanvas;

    QCursor mCursor;

    QAction *mAction = nullptr;

    QAbstractButton *mButton = nullptr;

    QString mToolName;
 
    friend class QgsMapCanvas;
    friend class TestQgsMapToolEdit;
};
 
Q_DECLARE_OPERATORS_FOR_FLAGS( QgsMapTool::Flags )
 
#endif