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EventFilterDialog.h

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

    This file is Copyright 2003-2006
        D. Michael McIntyre <dmmcintyr@users.sourceforge.net>

    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_EVENTFILTERDIALOG_H_
#define _RG_EVENTFILTERDIALOG_H_

#include <kdialogbase.h>
#include <utility>
#include <vector>
#include "base/Event.h"
#include <qcheckbox.h>
#include <qcombobox.h>

class QWidget;
class QSpinBox;
class QPushButton;
class QGridLayout;
class KConfig;


namespace Rosegarden
{

class Event;


/**
 * Creates a dialog box to allow the user to dial up various selection
 * criteria used for removing events from a selection.  It is up to the caller
 * to actually manipulate the selection.  After the dialog has been accepted,
 * its filterEvent() method can be used to decide whether a particular event
 * should continue to be selected.  See matrixview.cpp slotFilterSelection()
 * for an example of how to use this.
 */
00059 class EventFilterDialog : public KDialogBase
{
    Q_OBJECT

public:

    EventFilterDialog(QWidget* parent);
    ~EventFilterDialog();

    KConfig *cfg;

    //-------[ accessor functions ]------------------------

    // NOTE: the filterRange type is used to return an A B pair with A and B set
    // according to the state of the related include/exclude combo.  If A > B
    // then this is an inclusive range.  If A < B then it's an exclusive
    // range.  This saves passing around a third variable.
    typedef std::pair<long, long> filterRange;

    filterRange getPitch();
    filterRange getVelocity();
    filterRange getDuration();

    // returns TRUE if the property value falls with in the filterRange 
    bool eventInRange(filterRange foo, long property) {
        if (foo.first > foo.second)
            return (property <= foo.second || property >= foo.first);
        else
            return (property >= foo.first && property <= foo.second); }

    // Used to do the work of deciding whether to keep or reject an event
    // based on the state of the dialog's widgets.  Returns TRUE if an event
    // should continue to be selected.  This method is the heart of the
    // EventFilterDialog's public interface.
    bool keepEvent(Event* const &e);

protected:

    //--------[ member functions ]-------------------------
    
    // initialize the dialog
    void initDialog();

    // populate the duration combos
    void populateDurationCombos();

    // convert duration from combobox index into actual RG duration
    // between 0 and LONG_MAX
    long getDurationFromIndex(int index);

    // simple A B swap used to flip inclusive/exclusive values
    void invert (filterRange &);

    // return inclusive/exclusive toggle states concisely for tidy code
    bool pitchIsInclusive()    { return (m_notePitchIncludeComboBox->currentItem()    == 0); }
    bool velocityIsInclusive() { return (m_noteVelocityIncludeComboBox->currentItem() == 0); }
    bool durationIsInclusive() { return (m_noteDurationIncludeComboBox->currentItem() == 0); }

protected slots:

    // set widget values to include everything
    void slotToggleAll();

    // set widget values to include nothing
    void slotToggleNone();

    // write out settings to kconfig data for next time and call accept()
    virtual void slotOk();

    // update note name text display and ensure From <= To
    void slotPitchFromChanged(int pitch);
    void slotPitchToChanged(int pitch);
    
    // ensure From <= To to guarantee a logical range for these sets
    void slotVelocityFromChanged(int velocity);
    void slotVelocityToChanged(int velocity);
    void slotDurationFromChanged(int index);
    void slotDurationToChanged(int index);

    // create a pitch chooser widget sub-dialog to show pitch on staff
    void slotPitchFromChooser();
    void slotPitchToChooser();
    
private:
    //---------[ data members ]-----------------------------

    QGridLayout* layout;

    QComboBox*   m_noteDurationFromComboBox;
    QComboBox*   m_noteDurationIncludeComboBox;
    QComboBox*   m_noteDurationToComboBox;
    QComboBox*   m_notePitchIncludeComboBox;
    QComboBox*   m_noteVelocityIncludeComboBox;
    
    QPushButton* m_pitchFromChooserButton;
    QPushButton* m_pitchToChooserButton;
    QPushButton* m_buttonAll;
    QPushButton* m_buttonNone;
    
    QSpinBox*    m_pitchFromSpinBox;
    QSpinBox*    m_pitchToSpinBox;
    QSpinBox*    m_velocityFromSpinBox;
    QSpinBox*    m_velocityToSpinBox;

    std::vector<timeT> m_standardQuantizations;

};


}

#endif

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