
/* -*- 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 2000-2007
        Guillaume Laurent   <glaurent@telegraph-road.org>,
        Chris Cannam        <cannam@all-day-breakfast.com>,
        Richard Bown        <richard.bown@ferventsoftware.com>

    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_EDITVIEWBASE_H_
#define _RG_EDITVIEWBASE_H_

#include <set>
#include <string>
#include <kdockwidget.h>
#include <qstring.h>
#include <vector>
#include "base/Event.h"


class QWidget;
class QPaintEvent;
class QGridLayout;
class QFrame;
class QCloseEvent;
class QAccel;
class KToggleAction;
class KConfig;
class KCommand;
namespace Rosegarden { class EditViewTimeSigNotifier; }


namespace Rosegarden
{

class Segment;
class RosegardenGUIDoc;
class MultiViewCommandHistory;
class Event;
class EditToolBox;
class EditTool;


class EditViewBase : public KDockMainWindow
{

    Q_OBJECT

public:

    /**
     * Create an EditViewBase for the segments \a segments from document \a doc.
     *
     * \arg cols : number of columns, main column is always rightmost
     *
     */
    EditViewBase(RosegardenGUIDoc *doc,
             std::vector<Segment *> segments,
             unsigned int cols,
             QWidget *parent,
             const char *name = 0);

    virtual ~EditViewBase();

    const RosegardenGUIDoc *getDocument() const { return m_doc; }
    RosegardenGUIDoc *getDocument() { return m_doc; }

    /**
     * Refresh part of a Segment following a modification made in this
     * or another view.  The startTime and endTime give the extents of
     * the modified region.  This method is called following a
     * modification to any Segment; no attempt has been made to check
     * that the given Segment is actually shown in this view, so take
     * care.
     *
     * If segment is null, refresh all segments.
     * If the startTime and endTime are equal, refresh the whole of
     * the relevant segments.
     */
    virtual void refreshSegment(Segment *segment,
                                timeT startTime = 0,
                                timeT endTime = 0) = 0;

    /**
     * Get the document's global command history
     */
    virtual MultiViewCommandHistory *getCommandHistory();

    /**
     * Add a Command to the history
     */
    virtual void addCommandToHistory(KCommand *);

    /**
     * Update the view
     */
    virtual void updateView() = 0;

    /**
     * Return our local accelerator object
     */
    QAccel* getAccelerators() { return m_accelerators; }

    /**
     * Return a string unique to this view (amongst views currently
     * extant) that can be used (e.g. as a prefix) to distinguish
     * view-local properties.  It's up to the subclass or other user
     * of this string to manage the properties correctly, for example
     * by deleting them from the events when the view closes.
     */
    std::string getViewLocalPropertyPrefix() {
        return m_viewLocalPropertyPrefix;
    }

    /*
     * So that other people can create tools against our view
     *
     */
    EditToolBox* getToolBox() { return m_toolBox; }

    /**
     * Let tools know if their current element has gone
     */
    virtual void handleEventRemoved(Event *event);

    static const unsigned int ID_STATUS_MSG;
    static const unsigned int NbLayoutRows;


signals:
    /**
     * Tell the app to save the file.
     */
    void saveFile();

    /** 
     * Reopen the given segments in another sort of editor.
     */
    void openInNotation(std::vector<Segment *>);
    void openInMatrix(std::vector<Segment *>);
    void openInPercussionMatrix(std::vector<Segment *>);
    void openInEventList(std::vector<Segment *>);
    
    /**
     * Tell the main view that the track being edited is the
     * current selected track
     * This is used by #slotToggleSolo
     */
    void selectTrack(int);

    /**
     * Tell the main view that the solo status has changed (the user clicked on the 'solo' toggle)
     */
    void toggleSolo(bool);

    void windowActivated();

public slots:
    /**
     * close window
     */
    virtual void slotCloseWindow();

    /**
     * put the indicationed text/object into the clipboard and remove * it
     * from the document
     */
    virtual void slotEditCut() = 0;

    /**
     * put the indicationed text/object into the clipboard
     */
    virtual void slotEditCopy() = 0;

    /**
     * paste the clipboard into the document
     */
    virtual void slotEditPaste() = 0;

    /**
     * toggles the main toolbar
     */
    virtual void slotToggleToolBar();

    /**
     * toggles the statusbar
     */
    virtual void slotToggleStatusBar();

    /** 
     * Changes the statusbar contents for the standard label permanently,
     * used to indicate current actions.
     *
     * @param text the text that is displayed in the statusbar
     */
    virtual void slotStatusMsg(const QString &text);

    /**
     * Changes the status message of the whole statusbar for two
     * seconds, then restores the last status. This is used to display
     * statusbar messages that give information about actions for
     * toolbar icons and menuentries.
     *
     * @param text the text that is displayed in the statusbar
     */
    virtual void slotStatusHelpMsg(const QString &text);

    /**
     * A command has happened; check the clipboard in case we
     * need to change state
     */
    virtual void slotTestClipboard();

    /**
     * Connected to this view's toolbar 'solo' button
     */
    virtual void slotToggleSolo();

    void slotStateChanged(const QString&, bool noReverse);

    virtual void slotOpenInMatrix();
    virtual void slotOpenInPercussionMatrix();
    virtual void slotOpenInNotation();
    virtual void slotOpenInEventList();
    
    /**
     * Set the start time of the current segment
     */
    void slotSetSegmentStartTime();

    /**
     * Set the duration of the current segment
     */
    void slotSetSegmentDuration();

    /**
     * Global composition updates from the main view (track selection, solo, etc...)
     */
    virtual void slotCompositionStateUpdate();
    
protected:

    virtual void windowActivationChange(bool);

    virtual void paintEvent(QPaintEvent* e);

    /**
     * @see #setInCtor
     */
    virtual void closeEvent(QCloseEvent* e);

    /**
     * ignore close events while we're in ctor
     */
    void setOutOfCtor() { m_inCtor = false; }

    /**
     * Check if we're still in ctor
     */
    bool isInCtor() { return m_inCtor; }
    
    /**
     * Set the current Notation tool (note inserter, rest inserter, eraser...)
     *
     * Called when the user selects a new item on one of the notation toolbars
     * (notes toolbars, rests toolbars...)
     */
    void setTool(EditTool*);

    /**
     * read general Options again and initialize all variables like the recent file list
     */
    virtual void readOptions();

    /**
     * create menus and toolbars
     */
    virtual void setupActions(QString rcFileName, bool haveClipboard = true);

    /**
     * setup status bar
     */
    virtual void initStatusBar() = 0;

    /**
     * Abstract method to get current segment
     */
    virtual Segment *getCurrentSegment() = 0;

    /**
     * Set the caption of the view's window
     */
    virtual void updateViewCaption() = 0;

protected slots:
    /**
     * save general Options like all bar positions and status as well
     * as the geometry and the recent file list to the configuration
     * file
     */
    virtual void slotSaveOptions();
    virtual void slotConfigure();
    virtual void slotEditKeys();
    virtual void slotEditToolbars();
    virtual void slotUpdateToolbars();

protected:
    QWidget* getCentralWidget() { return m_centralFrame; }

    void initSegmentRefreshStatusIds();

    bool isCompositionModified();
    void setCompositionModified(bool);

    /**
     * Returns true if all of the segments contain
     * only rests and clefs events
     */
    bool getSegmentsOnlyRestsAndClefs();

    /// Convenience function around actionCollection()->action()
    KToggleAction* getToggleAction(const QString& actionName);

    /**
     * Make a widget visible depending on the state of a
     * KToggleAction
     */
    virtual void toggleWidget(QWidget* widget, const QString& toggleActionName);

    void setRCFileName(QString s) { m_rcFileName = s; }
    QString getRCFileName()       { return m_rcFileName; }

    /**
     * Set the page index of the config dialog which corresponds to
     * this editview
     */
    void setConfigDialogPageIndex(int p) { m_configDialogPageIndex = p; }
    int getConfigDialogPageIndex()       { return m_configDialogPageIndex; }

    //--------------- Data members ---------------------------------
    QString m_rcFileName;

    static std::set<int> m_viewNumberPool;
    std::string makeViewLocalPropertyPrefix();
    int m_viewNumber;
    std::string m_viewLocalPropertyPrefix;

    KConfig* m_config;

    RosegardenGUIDoc* m_doc;
    std::vector<Segment *> m_segments;
    std::vector<unsigned int> m_segmentsRefreshStatusIds;

    EditTool*    m_tool;
    EditToolBox* m_toolBox;

    KDockWidget *m_mainDockWidget;
    QFrame      *m_centralFrame;
    QGridLayout *m_grid;

    unsigned int m_mainCol;
    unsigned int m_compositionRefreshStatusId;
    bool         m_needUpdate;

    QPaintEvent *m_pendingPaintEvent;
    bool         m_havePendingPaintEvent;
    static bool  m_inPaintEvent; // true if _any_ edit view is in a paint event

    QAccel      *m_accelerators;

    int          m_configDialogPageIndex;

    bool         m_inCtor;

    EditViewTimeSigNotifier *m_timeSigNotifier;
};


}

#endif
