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+
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Rosegarden
+    A MIDI and audio sequencer and musical notation editor.
+
+    This program is Copyright 2000-2008
+        Guillaume Laurent   <[email protected]>,
+        Chris Cannam        <[email protected]>,
+        Richard Bown        <[email protected]>
+
+    The moral rights of Guillaume Laurent, Chris Cannam, and Richard
+    Bown to claim authorship of this work have been asserted.
+
+    Other copyrights also apply to some parts of this work.  Please
+    see the AUTHORS file and individual file headers for details.
+
+    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.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#ifndef _RG_TRACKEDITOR_H_
+#define _RG_TRACKEDITOR_H_
+
+#include "base/MidiProgram.h"
+#include <map>
+#include "TrackEditorIface.h"
+#include <qstring.h>
+#include <qwidget.h>
+#include "base/Event.h"
+#include "gui/editors/segment/TrackButtons.h"
+
+
+class QPaintEvent;
+class QDropEvent;
+class QDragEnterEvent;
+class KCommand;
+
+
+namespace Rosegarden
+{
+
+class TrackButtons;
+class TempoRuler;
+class Segment;
+class RulerScale;
+class RosegardenGUIDoc;
+class QDeferScrollView;
+class MultiViewCommandHistory;
+class CompositionView;
+class CompositionModel;
+class ChordNameRuler;
+class StandardRuler;
+
+
+/**
+ * Global widget for segment edition.
+ *
+ * Shows a global overview of the composition, and lets the user
+ * manipulate the segments
+ *
+ * @see CompositionView
+ */
+class TrackEditor : public QWidget, virtual public TrackEditorIface
+{
+    Q_OBJECT
+public:
+    /**
+     * Create a new TrackEditor representing the document \a doc
+     */
+    TrackEditor(RosegardenGUIDoc* doc,
+                QWidget* rosegardenguiview,
+                RulerScale *rulerScale,
+                bool showTrackLabels,
+                double initialUnitsPerPixel = 0,
+                QWidget* parent = 0, const char* name = 0,
+                WFlags f=0);
+
+    ~TrackEditor();
+
+    CompositionView* getSegmentCanvas()       { return m_segmentCanvas; }
+    TempoRuler*    getTempoRuler()          { return m_tempoRuler; }
+    ChordNameRuler*getChordNameRuler()      { return m_chordNameRuler; }
+    StandardRuler*    getTopStandardRuler()       { return m_topStandardRuler; }
+    StandardRuler*    getBottomStandardRuler()    { return m_bottomStandardRuler; }
+    TrackButtons*  getTrackButtons()        { return m_trackButtons; }
+    RulerScale*    getRulerScale() { return m_rulerScale; }
+
+    int getTrackCellHeight() const;
+
+    /**
+     * Add a new segment - DCOP interface
+     */
+    virtual void addSegment(int track, int start, unsigned int duration);
+
+    /**
+     * Manage command history
+     */
+    MultiViewCommandHistory *getCommandHistory();
+    void addCommandToHistory(KCommand *command);
+
+    void updateRulers();
+
+    bool isTracking() const { return m_playTracking; }
+
+public slots:
+
+    /**
+     * Scroll the view such that the numbered track is on-screen
+     */
+    void slotScrollToTrack(int trackPosition);
+
+    /**
+     * Set the position pointer during playback
+     */
+    void slotSetPointerPosition(timeT position);
+
+    /**
+     * Update the pointer position as it is being dragged along
+     * This changes how the segment canvas will scroll to follow the pointer
+     */
+    void slotPointerDraggedToPosition(timeT position);
+
+    /**
+     * Update the loop end position as it is being dragged along
+     * This changes how the segment canvas will scroll to follow the pointer
+     */
+    void slotLoopDraggedToPosition(timeT position);
+
+    /**
+     * Act on a canvas scroll event
+     */
+    void slotCanvasScrolled(int, int);
+
+    /**
+     * Adjust the canvas size to that required for the composition
+     */
+    void slotReadjustCanvasSize();
+
+    /**
+     * Show the given loop on the ruler or wherever
+     */
+    void slotSetLoop(timeT start, timeT end);
+
+    /**
+     * Add given number of tracks
+     */
+    void slotAddTracks(unsigned int nbTracks, InstrumentId id, int position);
+
+    /*
+     * Delete a given track
+     */
+    void slotDeleteTracks(std::vector<TrackId> tracks);
+
+    void slotDeleteSelectedSegments();
+    void slotTurnRepeatingSegmentToRealCopies();
+
+    void slotToggleTracking();
+
+protected slots:
+    void slotSegmentOrderChanged(int section, int fromIdx, int toIdx);
+
+    void slotTrackButtonsWidthChanged();
+
+    /// Scroll the track buttons along with the segment canvas
+    void slotVerticalScrollTrackButtons(int y);
+
+signals:
+    /**
+     * Emitted when the represented data changed and the SegmentCanvas
+     * needs to update itself
+     *
+     * @see SegmentCanvas::update()
+     */
+    void needUpdate();
+
+    /**
+     * sent back to RosegardenGUI
+     */
+    void stateChange(QString, bool);
+
+    /**
+     * A URI to a Rosegarden document was dropped on the canvas
+     *
+     * @see RosegardenGUI#slotOpenURL()
+     */
+    void droppedDocument(QString uri);
+
+    /**
+     * An audio file was dropped from the audio manager dialog
+     */
+    void droppedAudio(QString audioDesc);
+
+    /**
+     * And audio file was dropped from konqi say and needs to be
+     * inserted into AudioManagerDialog before adding to the 
+     * composition.
+     */
+    void droppedNewAudio(QString audioDesc);
+
+protected:
+
+    virtual void dragEnterEvent(QDragEnterEvent *event);
+    virtual void dropEvent(QDropEvent*);
+    
+    virtual void paintEvent(QPaintEvent* e);
+    
+    void init(QWidget *);
+
+    bool isCompositionModified();
+    void setCompositionModified(bool);
+    
+    /// return true if an actual move occurred between current and new position, newPosition contains the horiz. pos corresponding to newTimePosition
+    bool handleAutoScroll(int currentPosition, timeT newTimePosition, double& newPosition);
+    
+    //--------------- Data members ---------------------------------
+
+    RosegardenGUIDoc        *m_doc;
+    RulerScale  *m_rulerScale;
+    TempoRuler              *m_tempoRuler;
+    ChordNameRuler          *m_chordNameRuler;
+    StandardRuler              *m_topStandardRuler;
+    StandardRuler              *m_bottomStandardRuler;
+    TrackButtons            *m_trackButtons;
+    CompositionView         *m_segmentCanvas;
+    CompositionModel        *m_compositionModel;
+    QDeferScrollView        *m_trackButtonScroll;
+
+    bool                     m_showTrackLabels;
+    unsigned int             m_canvasWidth;
+    unsigned int             m_compositionRefreshStatusId;
+    bool                     m_playTracking;
+
+    typedef std::map<Segment *, unsigned int>
+        SegmentRefreshStatusIdMap;
+    SegmentRefreshStatusIdMap m_segmentsRefreshStatusIds;
+
+    double                   m_initialUnitsPerPixel;
+};
+
+
+}
+
+#endif