VectorView.h

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/* VectorView.h - declaration of VectorView class.
 *
 * Copyright (c) 2019 Martin Pavelek <he29/dot/HS/at/gmail/dot/com>
 * Copyright (c) 2025- Michael Gregorius
 *
 * 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 VECTORVIEW_H
#define VECTORVIEW_H
 
#include <QWidget>
 
#include "LocklessRingBuffer.h"
 
namespace lmms
{
class VecControls;
class SampleFrame;
}
 
//#define VEC_DEBUG
 
namespace lmms::gui
{
 
 
// Widget that displays a vectorscope visualization of stereo signal.
class VectorView : public QWidget
{
        Q_OBJECT
public:
        VectorView(VecControls* controls, LocklessRingBuffer<SampleFrame>* inputBuffer, QWidget* parent = nullptr);
        ~VectorView() override = default;
 
        QSize sizeHint() const override {return QSize(300, 300);}
 
        Q_PROPERTY(QColor colorTrace MEMBER m_colorTrace)
        Q_PROPERTY(QColor colorGrid MEMBER m_colorGrid)
        Q_PROPERTY(QColor colorLabels MEMBER m_colorLabels)
 
protected:
        void paintEvent(QPaintEvent *event) override;
        void mouseDoubleClickEvent(QMouseEvent *event) override;
        void wheelEvent(QWheelEvent *event) override;
 
private slots:
        void periodicUpdate();
 
private:
        void drawZoomInfo();
 
private:
        VecControls *m_controls;
 
        LocklessRingBuffer<SampleFrame> *m_inputBuffer;
        LocklessRingBufferReader<SampleFrame> m_bufferReader;
 
        float m_zoom;
 
        // State variables for comparison with previous repaint
        unsigned int m_zoomTimestamp;
 
        QPointF m_lastPoint = QPoint();
 
        QColor m_colorTrace = QColor(60, 255, 130, 255);        // ~LMMS green
        QColor m_colorGrid = QColor(76, 80, 84, 128);           // ~60 % gray (slightly cold / blue), 50 % transparent
        QColor m_colorLabels = QColor(76, 80, 84, 255);         // ~60 % gray (slightly cold / blue)
 
#ifdef VEC_DEBUG
        float m_executionAvg = 0;
#endif
};
 
 
} // namespace lmms::gui
 
#endif // VECTORVIEW_H