StepRecorder.h

Go to the documentation of this file.

/*
 * This file is part of LMMS - https://lmms.io
 *
 * 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.
 *
 * 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 (see COPYING); if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301 USA.
 *
 */
 
#ifndef LMMS_STEP_RECORDER_H
#define LMMS_STEP_RECORDER_H
 
#include <QElapsedTimer>
#include <QTimer>
#include <QObject>
 
#include "Note.h"
 
class QKeyEvent;
class QMouseEvent;
 
namespace lmms
{
 
class MidiClip;
 
namespace gui
{
class PianoRoll;
class StepRecorderWidget;
} // namespace gui
 
class StepRecorder : public QObject
{
        Q_OBJECT
 
        public:
        StepRecorder(gui::PianoRoll& pianoRoll, gui::StepRecorderWidget& stepRecorderWidget);
 
        void initialize();
        void start(const TimePos& currentPosition,const TimePos& stepLength);
        void stop();
        void notePressed(const Note & n);
        void noteReleased(const Note & n);
        bool keyPressEvent(QKeyEvent* ke);
        bool mousePressEvent(QMouseEvent* ke);
        void setCurrentMidiClip(MidiClip* newMidiClip);
        void setStepsLength(const TimePos& newLength);
 
        std::vector<Note*> getCurStepNotes();
 
        bool isRecording() const
        {
                return m_isRecording;
        }
 
        private slots:
        void removeNotesReleasedForTooLong();
 
        private:
        void stepForwards();
        void stepBackwards();
 
        void applyStep();
        void dismissStep();
        void prepareNewStep();
 
        TimePos getCurStepEndPos();
 
        void updateCurStepNotes();
        void updateWidget();
 
        bool allCurStepNotesReleased();
 
        gui::PianoRoll& m_pianoRoll;
        gui::StepRecorderWidget& m_stepRecorderWidget;
 
        bool m_isRecording = false;
        TimePos m_curStepStartPos = 0;
        TimePos m_curStepEndPos = 0;
 
        TimePos m_stepsLength;
        TimePos m_curStepLength; // current step length refers to the step currently recorded. it may defer from m_stepsLength
                                                          // since the user can make current step larger
 
        QTimer m_updateReleasedTimer;
 
        MidiClip* m_midiClip;
 
        class StepNote
        {
                public:
                StepNote(const Note & note) : m_note(note), m_pressed(true) {};
 
                void setPressed()
                {
                        m_pressed = true;
                }
 
                void setReleased()
                {
                        m_pressed = false;
                        releasedTimer.start();
                }
 
                int timeSinceReleased()
                {
                        return releasedTimer.elapsed();
                }
 
                bool isPressed() const
                {
                        return m_pressed;
                }
 
                bool isReleased() const
                {
                        return !m_pressed;
                }
 
                Note m_note;
 
                private:
                bool m_pressed;
                QElapsedTimer releasedTimer;
        } ;
 
        std::vector<StepNote*> m_curStepNotes; // contains the current recorded step notes (i.e. while user still press the notes; before they are applied to the clip)
 
        StepNote* findCurStepNote(const int key);
 
        bool m_isStepInProgress = false;
};
 
 
} // namespace lmms
 
#endif // LMMS_STEP_RECORDER_H