qgsadvanceddigitizingdockwidget.h

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/***************************************************************************
    qgsadvanceddigitizingdockwidget.h  -  dock for CAD tools
    ----------------------
    begin                : October 2014
    copyright            : (C) Denis Rouzaud
    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 QGSADVANCEDDIGITIZINGDOCK
#define QGSADVANCEDDIGITIZINGDOCK

#include <QList>

#include <memory>

#include "ui_qgsadvanceddigitizingdockwidgetbase.h"
#include "qgis_gui.h"
#include "qgis.h"
#include "qgsdockwidget.h"
#include "qgsmessagebaritem.h"
#include "qgspointxy.h"
#include "qgspointlocator.h"
#include "qgssnapindicator.h"


class QgsAdvancedDigitizingCanvasItem;
class QgsMapCanvas;
class QgsMapTool;
class QgsMapToolAdvancedDigitizing;
class QgsMapMouseEvent;

class GUI_EXPORT QgsAdvancedDigitizingDockWidget : public QgsDockWidget, private Ui::QgsAdvancedDigitizingDockWidgetBase
{
    Q_OBJECT

  public:

    enum CadCapacity
    {
      AbsoluteAngle = 1, 
      RelativeAngle = 2, 
      RelativeCoordinates = 4, 
    };
    Q_DECLARE_FLAGS( CadCapacities, CadCapacity )
    Q_FLAG( CadCapacities )

    enum AdditionalConstraint
    {
      NoConstraint,  
      Perpendicular, 
      Parallel       
    };

    class GUI_EXPORT CadConstraint
    {
      public:

        enum LockMode
        {
          NoLock,
          SoftLock,
          HardLock
        };

        CadConstraint( QLineEdit *lineEdit, QToolButton *lockerButton, QToolButton *relativeButton = nullptr, QToolButton *repeatingLockButton = nullptr )
          : mLineEdit( lineEdit )
          , mLockerButton( lockerButton )
          , mRelativeButton( relativeButton )
          , mRepeatingLockButton( repeatingLockButton )
          , mLockMode( NoLock )
          , mRepeatingLock( false )
          , mRelative( false )
          , mValue( 0.0 )
        {}

        LockMode lockMode() const { return mLockMode; }

        bool isLocked() const { return mLockMode != NoLock; }

        bool isRepeatingLock() const { return mRepeatingLock; }

        bool relative() const { return mRelative; }

        double value() const { return mValue; }

        QLineEdit *lineEdit() const { return mLineEdit; }

        void setLockMode( LockMode mode );

        void setRepeatingLock( bool repeating );

        void setRelative( bool relative );

        void setValue( double value, bool updateWidget = true );

        void toggleLocked();

        void toggleRelative();

      private:
        QLineEdit *mLineEdit = nullptr;
        QToolButton *mLockerButton = nullptr;
        QToolButton *mRelativeButton = nullptr;
        QToolButton *mRepeatingLockButton = nullptr;
        LockMode mLockMode;
        bool mRepeatingLock;
        bool mRelative;
        double mValue;
    };

    explicit QgsAdvancedDigitizingDockWidget( QgsMapCanvas *canvas, QWidget *parent = nullptr );

    void hideEvent( QHideEvent * ) override;

    bool canvasKeyPressEventFilter( QKeyEvent *e );

    bool applyConstraints( QgsMapMouseEvent *e );

    bool alignToSegment( QgsMapMouseEvent *e, QgsAdvancedDigitizingDockWidget::CadConstraint::LockMode lockMode = QgsAdvancedDigitizingDockWidget::CadConstraint::HardLock );

    void releaseLocks( bool releaseRepeatingLocks = true );

    void clear();

    void keyPressEvent( QKeyEvent *e ) override;

    bool cadEnabled() const { return mCadEnabled; }

    bool constructionMode() const { return mConstructionMode; }

    AdditionalConstraint additionalConstraint() const  { return mAdditionalConstraint; }
    const CadConstraint *constraintAngle() const  { return mAngleConstraint.get(); }
    const CadConstraint *constraintDistance() const { return mDistanceConstraint.get(); }
    const CadConstraint *constraintX() const { return mXConstraint.get(); }
    const CadConstraint *constraintY() const { return mYConstraint.get(); }
    bool commonAngleConstraint() const { return !qgsDoubleNear( mCommonAngleConstraint, 0.0 ); }

    QgsPointLocator::Match mapPointMatch() const { return mSnapMatch; }

    void clearPoints();

    void addPoint( const QgsPointXY &point );

    void removePreviousPoint();

    void setPoints( const QList<QgsPointXY> &points );

    QgsPointXY currentPoint( bool *exists  = nullptr ) const;

    QgsPointXY previousPoint( bool *exists = nullptr ) const;

    QgsPointXY penultimatePoint( bool *exists = nullptr ) const;

    inline int pointsCount() const { return mCadPointList.count(); }

    inline bool snappedToVertex() const { return ( mSnapMatch.isValid() && mSnapMatch.hasVertex() ); }

    QList<QgsPointXY> snappedSegment() const { return mSnappedSegment; }

    QAction *enableAction() { return mEnableAction; }

    void enable();

    void disable();

    void updateCadPaintItem();

  signals:

    void pushWarning( const QString &message );

    void popWarning();

    void pointChanged( const QgsPointXY &point );

  private slots:
    void additionalConstraintClicked( bool activated );

    void lockConstraint( bool activate = true );

    void constraintTextEdited( const QString &textValue );

    void constraintFocusOut();

    void setConstraintRelative( bool activate );

    void setConstraintRepeatingLock( bool activate );

    void activateCad( bool enabled );

    void setConstructionMode( bool enabled );

    void settingsButtonTriggered( QAction *action );

  private:
    void setCadEnabled( bool enabled );

    void updateCapacity( bool updateUIwithoutChange = false );

    void lockAdditionalConstraint( AdditionalConstraint constraint );

    QList<QgsPointXY> snapSegmentToAllLayers( const QgsPointXY &originalMapPoint, bool *snapped = nullptr ) const;

    void updateCurrentPoint( const QgsPointXY &point );


    bool filterKeyPress( QKeyEvent *e );

    bool eventFilter( QObject *obj, QEvent *event ) override SIP_SKIP;

    void triggerMouseMoveEvent();

    CadConstraint *objectToConstraint( const QObject *obj ) const;

    double parseUserInput( const QString &inputValue, bool &ok ) const;

    void updateConstraintValue( CadConstraint *constraint, const QString &textValue, bool convertExpression = false );

    void updateUnlockedConstraintValues( const QgsPointXY &point );

    QgsMapCanvas *mMapCanvas = nullptr;
    QgsAdvancedDigitizingCanvasItem *mCadPaintItem = nullptr;
    std::unique_ptr<QgsSnapIndicator> mSnapIndicator;

    CadCapacities mCapacities = nullptr;

    bool mCurrentMapToolSupportsCad = false;

    // CAD properties
    bool mCadEnabled = false;
    bool mConstructionMode = false;

    // constraints
    std::unique_ptr< CadConstraint > mAngleConstraint;
    std::unique_ptr< CadConstraint > mDistanceConstraint;
    std::unique_ptr< CadConstraint > mXConstraint;
    std::unique_ptr< CadConstraint > mYConstraint;
    AdditionalConstraint mAdditionalConstraint;
    double mCommonAngleConstraint; // if 0: do not snap to common angles

    // point list and current snap point / segment
    QList<QgsPointXY> mCadPointList;
    QList<QgsPointXY> mSnappedSegment;

    bool mSessionActive = false;

    // error message
    std::unique_ptr<QgsMessageBarItem> mErrorMessage;

    // UI
    QMap< QAction *, double > mCommonAngleActions; // map the common angle actions with their angle values

    // Snap indicator

    QgsPointLocator::Match mSnapMatch;
  private:
#ifdef SIP_RUN
    bool eventFilter( QObject *obj, QEvent *event );
#endif
};

Q_DECLARE_OPERATORS_FOR_FLAGS( QgsAdvancedDigitizingDockWidget::CadCapacities )

#endif // QGSADVANCEDDIGITIZINGDOCK_H