qgsmaptoolselectionhandler.h

Go to the documentation of this file.

/***************************************************************************
    qgsmaptoolselectionhandler.cpp
    ---------------------
    begin                : March 2018
    copyright            : (C) 2018 by Viktor Sklencar
    email                : vsklencar 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 QGSMAPTOOLSELECTIONHANDLER_H
#define QGSMAPTOOLSELECTIONHANDLER_H
 
#include "qgis_gui.h"
#include "qgsgeometry.h"
 
#include <QObject>
#include <QTimer>
#include <QWidget>
 
#define SIP_NO_FILE
 
class QHBoxLayout;
class QKeyEvent;
 
class QgsDoubleSpinBox;
class QgsMapCanvas;
class QgsMapMouseEvent;
class QgsRubberBand;
class QgsSnapIndicator;
class QgsIdentifyMenu;
 


class QgsDistanceWidget : public QWidget
{
    Q_OBJECT
 
  public:
    explicit QgsDistanceWidget( const QString &label = QString(), QWidget *parent = nullptr );

    void setDistance( double distance );
    double distance();
 
  signals:
    void distanceChanged( double distance );
    void distanceEditingFinished( double distance, const Qt::KeyboardModifiers &modifiers );
    void distanceEditingCanceled();
 
  protected:
    bool eventFilter( QObject *obj, QEvent *ev ) override;
 
  private:
    QHBoxLayout *mLayout = nullptr;
    QgsDoubleSpinBox *mDistanceSpinBox = nullptr;
};

 

class GUI_EXPORT QgsMapToolSelectionHandler : public QObject
{
    Q_OBJECT
 
  public:
    enum SelectionMode
    {
      SelectSimple,
      SelectPolygon,
      SelectFreehand,
      SelectRadius,

      SelectOnMouseOver
    };
    Q_ENUM( SelectionMode )
 
    
    QgsMapToolSelectionHandler( QgsMapCanvas *canvas, QgsMapToolSelectionHandler::SelectionMode selectionMode = QgsMapToolSelectionHandler::SelectionMode::SelectSimple );

    ~QgsMapToolSelectionHandler() override;

    QgsGeometry selectedGeometry() const;

    SelectionMode selectionMode() const;
    void setSelectionMode( SelectionMode mode );

    void deactivate();

    void canvasMoveEvent( QgsMapMouseEvent *e );
    void canvasPressEvent( QgsMapMouseEvent *e );
    void canvasReleaseEvent( QgsMapMouseEvent *e );
    bool keyReleaseEvent( QKeyEvent *e );

    void setSelectedGeometry( const QgsGeometry &geometry, Qt::KeyboardModifiers modifiers = Qt::NoModifier );
 
  signals:
    void geometryChanged( Qt::KeyboardModifiers modifiers = Qt::NoModifier );
 
  private slots:
    void updateRadiusRubberband( double radius );

    void radiusValueEntered( double radius, Qt::KeyboardModifiers modifiers );

    void cancel();
 
  private:
    void selectFeaturesMoveEvent( QgsMapMouseEvent *e );
    void selectFeaturesReleaseEvent( QgsMapMouseEvent *e );
    void selectFeaturesPressEvent( QgsMapMouseEvent *e );
 
    void selectPolygonMoveEvent( QgsMapMouseEvent *e );
    void selectPolygonPressEvent( QgsMapMouseEvent *e );
 
    void selectFreehandMoveEvent( QgsMapMouseEvent *e );
    void selectFreehandReleaseEvent( QgsMapMouseEvent *e );
 
    void selectRadiusMoveEvent( QgsMapMouseEvent *e );
    void selectRadiusReleaseEvent( QgsMapMouseEvent *e );
 
    void initRubberBand();
 
    QgsPointXY toMapCoordinates( QPoint point );
 
    void createDistanceWidget();
    void deleteDistanceWidget();
 
    void updateRadiusFromEdge( QgsPointXY &radiusEdge );
 
  private:
    QgsMapCanvas *mCanvas = nullptr;

    std::unique_ptr<QgsRubberBand> mSelectionRubberBand;

    QgsGeometry mSelectionGeometry;

    bool mSelectionActive = false;
 
    SelectionMode mSelectionMode = SelectSimple;

    std::unique_ptr<QgsSnapIndicator> mSnapIndicator;

    QPoint mInitDragPos;

    QgsPointXY mRadiusCenter;

    QgsDistanceWidget *mDistanceWidget = nullptr;
 
    QColor mFillColor = QColor( 254, 178, 76, 63 );
    QColor mStrokeColor = QColor( 254, 58, 29, 100 );

    QgsIdentifyMenu *mIdentifyMenu = nullptr; // owned by canvas

    std::unique_ptr<QTimer> mOnMouseMoveDelayTimer;

    QPoint mMoveLastCursorPos;
};
 
#endif