    //=============================================================================
    //  MuseScore
    //  Music Composition & Notation
    //
    //  Copyright (C) 2009-2011 Werner Schweer
    //
    //  This program is free software; you can redistribute it and/or modify
    //  it under the terms of the GNU General Public License version 2
    //  as published by the Free Software Foundation and appearing in
    //  the file LICENCE.GPL
    //=============================================================================

    #ifndef __PIANOROLL_H__
    #define __PIANOROLL_H__

    namespace Awl {
          class PitchEdit;
          class PosLabel;
          };

    #include "libmscore/mscoreview.h"
    #include "libmscore/pos.h"
    #include "libmscore/score.h"
    #include "libmscore/select.h"

    namespace Ms {

    class Score;
    class Staff;
    class PianoView;
    class Note;
    class Ruler;
    class Seq;
    class WaveView;

    //---------------------------------------------------------
    //   PianorollEditor
    //---------------------------------------------------------

    class PianorollEditor : public QMainWindow, public MuseScoreView {
          Q_OBJECT

          PianoView* gv;
          QScrollBar* hsb;        // horizontal scroll bar for pianoView
          Score* _score;
          Staff* staff;
          Awl::PitchEdit* pitch;
          QSpinBox* velocity;
          QSpinBox* onTime;
          QSpinBox* tickLen;
          Pos locator[3];
          QComboBox* veloType;
          Awl::PosLabel* pos;
          Ruler* ruler;
          QAction* showWave;
          WaveView* waveView;
          QSplitter* split;
          QList<QAction*> actions;

          void updateVelocity(Note* note);
          void updateSelection();
          void readSettings();

       private slots:
          void selectionChanged();
          void veloTypeChanged(int);
          void velocityChanged(int);
          void keyPressed(int);
          void keyReleased(int);
          void moveLocator(int, const Pos&);
          void cmd(QAction*);
          void rangeChanged(int min, int max);
          void setXpos(int x);
          void showWaveView(bool);
          void posChanged(POS pos, unsigned tick);
          void tickLenChanged(int);
          void onTimeChanged(int val);
          void playlistChanged();

       public slots:
          void changeSelection(SelState);

       public:
          PianorollEditor(QWidget* parent = 0);
          virtual ~PianorollEditor();

          void setStaff(Staff* staff);
          void heartBeat(Seq*);

          virtual void dataChanged(const QRectF&);
          virtual void updateAll();
          virtual void adjustCanvasPosition(const Element*, bool);
          virtual void removeScore();
          virtual void changeEditElement(Element*);
          virtual QCursor cursor() const;
          virtual void setCursor(const QCursor&);
          virtual int gripCount() const;
          virtual const QTransform& matrix() const;
          virtual void setDropRectangle(const QRectF&);
          virtual void cmdAddSlur(Note*, Note*);
          virtual void cmdAddHairpin(bool) {}
          virtual void startEdit();
          virtual void startEdit(Element*, Grip);
          virtual Element* elementNear(QPointF);
          virtual void drawBackground(QPainter* /*p*/, const QRectF& /*r*/) const {}

          void setLocator(POS pos, int tick) { locator[int(pos)].setTick(tick); }

          void writeSettings();
          virtual const QRect geometry() const override { return QMainWindow::geometry(); }
          };

    } // namespace Ms
    #endif

↑ V762 It is possible a virtual function was overridden incorrectly. See third argument of function 'adjustCanvasPosition' in derived class 'PianorollEditor' and base class 'MuseScoreView'.

↑ V703 It is odd that the '_score' field in derived class 'PianorollEditor' overwrites field in base class 'MuseScoreView'. Check lines: pianoroll.h:45, mscoreview.h:34.