SaWaterfallView.h

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/* SaWaterfallView.h - declaration of SaWaterfallView class.
 *
 * Copyright (c) 2019 Martin Pavelek <he29/dot/HS/at/gmail/dot/com>
 *
 * 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 SAWATERFALLVIEW_H
#define SAWATERFALLVIEW_H
 
#include <string>
#include <utility>
#include <vector>
#include <QWidget>
 
 
 
namespace lmms
{
class SaControls;
class SaProcessor;
}
 
namespace lmms::gui
{
 
class EffectControlDialog;
 
 
// Widget that displays a spectrum waterfall (spectrogram) and time labels.
class SaWaterfallView : public QWidget
{
        Q_OBJECT
public:
        explicit SaWaterfallView(SaControls *controls, SaProcessor *processor, QWidget *_parent = 0);
        ~SaWaterfallView() override = default;
 
        QSize sizeHint() const override {return QSize(400, 350);}
 
        // Check if waterfall should be displayed and adjust window size if needed.
        void updateVisibility();
 
protected:
        void paintEvent(QPaintEvent *event) override;
        void mouseMoveEvent(QMouseEvent *event) override;
        void mousePressEvent(QMouseEvent *event) override;
        void resizeEvent(QResizeEvent *event) override;
 
private slots:
        void periodicUpdate();
 
private:
        const SaControls *m_controls;
        SaProcessor *m_processor;
        const EffectControlDialog *m_controlDialog;
 
        // Methods and data used to make time labels
        float m_oldSecondsPerLine;
        float m_oldHeight;
        float samplesPerLine();
        float secondsPerLine();
        float timeToYPixel(float time, int height);
        float yPixelToTime(float position, int height);
        std::vector<std::pair<float, std::string>> makeTimeTics();
        std::vector<std::pair<float, std::string>> m_timeTics;  // 0..n (s)
 
        // current cursor location and a method to draw it
        QPointF m_cursor;
        void drawCursor(QPainter &painter);
 
        // current boundaries for drawing
        unsigned int m_displayTop;
        unsigned int m_displayBottom;
        unsigned int m_displayLeft;
        unsigned int m_displayRight;
        unsigned int m_displayWidth;
        unsigned int m_displayHeight;
 
        #ifdef SA_DEBUG
                float m_execution_avg;
        #endif
};
 
 
} // namespace lmms::gui
 
#endif // SAWATERFALLVIEW_H