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//=============================================================================
// MuseScore
// Linux Music Score Editor
// $Id: navigator.h 4785 2011-09-14 10:06:35Z wschweer $
//
// Copyright (C) 2002-2009 Werner Schweer and others
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//=============================================================================
#ifndef __NAVIGATOR_H__
#define __NAVIGATOR_H__
class Score;
class ScoreView;
class Page;
class Navigator;
//---------------------------------------------------------
// NScrollArea
// modified QScrollArea for Navigator
//---------------------------------------------------------
class NScrollArea : public QScrollArea {
Q_OBJECT
virtual void resizeEvent(QResizeEvent*);
public:
NScrollArea(QWidget* w = 0);
};
//---------------------------------------------------------
// PageCache
//---------------------------------------------------------
struct PageCache {
bool valid;
Page* page;
QImage pm;
QTransform matrix;
Navigator* navigator;
};
//---------------------------------------------------------
// Navigator
//---------------------------------------------------------
class Navigator : public QWidget {
Q_OBJECT
Score* _score;
NScrollArea* scrollArea;
QPointer<ScoreView> _cv;
QRect viewRect;
QPoint startMove;
QList<PageCache> pcl;
QList<PageCache*> npcl;
QTransform matrix;
QFuture<void> updatePixmap;
QFutureWatcher<void> watcher;
bool recreatePixmap;
int cachedWidth;
void rescale();
virtual void paintEvent(QPaintEvent*);
virtual void mousePressEvent(QMouseEvent*);
virtual void mouseMoveEvent(QMouseEvent*);
virtual void resizeEvent(QResizeEvent*);
private slots:
void pmFinished();
public slots:
void updateViewRect();
void layoutChanged();
signals:
void viewRectMoved(const QRectF&);
public:
Navigator(NScrollArea* sa, QWidget* parent = 0);
void setScoreView(ScoreView*);
void setScore(Score*);
Score* score() const { return _score; }
void setViewRect(const QRectF& r);
};
#endif
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