StepRecorderWidget.h

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/*
 * StepRecorderWidget.h - widget that provide gui markers for step recording
 *
 * 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_GUI_STEP_RECOREDER_WIDGET_H
#define LMMS_GUI_STEP_RECOREDER_WIDGET_H
 
#include <QWidget>
#include <QColor>
 
#include "TimePos.h"
 
namespace lmms::gui
{
 
class StepRecorderWidget : public QWidget
{
    Q_OBJECT
 
public:
    StepRecorderWidget(
        QWidget * parent,
        const int ppb,
        const int marginTop,
        const int marginBottom,
        const int marginLeft,
        const int marginRight);
 
    //API used by PianoRoll
    void setPixelsPerBar(int ppb);
    void setCurrentPosition(TimePos currentPosition);
    void setMargins(const QMargins &qm);
    void setBottomMargin(const int marginBottom);
    QMargins margins();
 
    //API used by StepRecorder
    void setStepsLength(TimePos stepsLength);
    void setStartPosition(TimePos pos);
    void setEndPosition(TimePos pos);
 
    void showHint();
 
private:
    void paintEvent(QPaintEvent * pe) override;
 
    int xCoordOfTick(int tick);
 
    void drawVerLine(QPainter* painter, int x, const QColor& color, int top, int bottom);
    void drawVerLine(QPainter* painter, const TimePos& pos, const QColor& color, int top, int bottom);
 
    void updateBoundaries();
 
    TimePos m_stepsLength;
    TimePos m_curStepStartPos;
    TimePos m_curStepEndPos;
 
    int m_ppb; // pixels per bar
    TimePos m_currentPosition; // current position showed by on PianoRoll
 
    QColor m_colorLineStart;
    QColor m_colorLineEnd;
 
    // boundaries within piano roll window
    int m_top;
    int m_bottom;
    int m_left;
    int m_right;
 
    const int m_marginTop;
    int m_marginBottom; // not const since can change on resize of edit-note area
    const int m_marginLeft;
    const int m_marginRight;
 
signals:
    void positionChanged(const lmms::TimePos & t);
} ;
 
} // namespace lmms::gui
 
#endif // LMMS_GUI_STEP_RECOREDER_WIDGET_H