SlicerTWaveform.h

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/*
 * SlicerTWaveform.h - declaration of class SlicerTWaveform
 *
 * Copyright (c) 2023 Daniel Kauss Serna <daniel.kauss.serna@gmail.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 LMMS_GUI_SLICERT_WAVEFORM_H
#define LMMS_GUI_SLICERT_WAVEFORM_H
 
#include <QElapsedTimer>
#include <QWidget>
 
#include "SampleThumbnail.h"
 
namespace lmms {
 
class SlicerT;
 
namespace gui {
 
class SlicerTWaveform : public QWidget
{
    Q_OBJECT
 
public slots:
    void updateUI();
    void isPlaying(float current, float start, float end);
 
public:
    SlicerTWaveform(int totalWidth, int totalHeight, SlicerT* instrument, QWidget* parent);
 
    // predefined sizes
    static constexpr int s_seekerHorMargin = 5;
    static constexpr int s_seekerVerMargin = 6;
    static constexpr int s_middleMargin = 6;
    static constexpr int s_arrowHeight = 5;
 
    // interaction behavior values
    static constexpr float s_distanceForClick = 0.02f;
    static constexpr float s_minSeekerDistance = 0.13f;
    static constexpr float s_zoomSensitivity = 0.5f;
    static constexpr int s_minMilisPassed = 10;
 
    enum class UIObjects
    {
        Nothing,
        SeekerStart,
        SeekerEnd,
        SeekerMiddle,
        SlicePoint,
    };
 
protected:
    void mousePressEvent(QMouseEvent* me) override;
    void mouseReleaseEvent(QMouseEvent* me) override;
    void mouseMoveEvent(QMouseEvent* me) override;
    void mouseDoubleClickEvent(QMouseEvent* me) override;
    void wheelEvent(QWheelEvent* we) override;
 
    void paintEvent(QPaintEvent* pe) override;
    void resizeEvent(QResizeEvent* event) override;
 
private:
    int m_width;
    int m_height;
 
    int m_seekerHeight; // used to calcualte all vertical sizes
    int m_seekerWidth;
    int m_editorHeight;
    int m_editorWidth;
 
    UIObjects m_closestObject;
    int m_closestSlice = -1;
 
    float m_seekerStart = 0;
    float m_seekerEnd = 1;
    float m_seekerMiddle = 0.5f;
 
    float m_noteCurrent;
    float m_noteStart;
    float m_noteEnd;
 
    float m_zoomLevel = 1.0f;
 
    QPixmap m_sliceArrow;
    QPixmap m_seeker;
    QPixmap m_seekerWaveform;
    QPixmap m_editorWaveform;
    QPixmap m_sliceEditor;
    QPixmap m_emptySampleIcon;
    
    SampleThumbnail m_sampleThumbnail;
 
    SlicerT* m_slicerTParent;
 
    QElapsedTimer m_updateTimer;
    void drawSeekerWaveform();
    void drawSeeker();
    void drawEditorWaveform();
    void drawEditor();
 
    void updateClosest(QMouseEvent* me);
    void updateCursor();
};
} // namespace gui
} // namespace lmms
#endif // LMMS_GUI_SLICERT_WAVEFORM_H