60 lines
1.5 KiB
C++
60 lines
1.5 KiB
C++
#pragma once
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#include <QWidget>
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#include <QAudioBuffer>
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#include <QCache>
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#include <QDateTime>
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#include <QTimer>
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#include "audioformat.h"
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class ScratchWidget : public QWidget
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{
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Q_OBJECT
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public:
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explicit ScratchWidget(QWidget *parent = nullptr);
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const QAudioBuffer &buffer() const { return m_buffer; }
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void setBuffer(const QAudioBuffer &buffer) { m_buffer = buffer; m_graphCache.clear(); repaint(); }
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std::ptrdiff_t position() const { return m_position; }
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void setPosition(std::ptrdiff_t position) { m_position = position; repaint(); }
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int beatWidth() const { return m_beatWidth; };
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void setBeatWidth(int beatWidth) { m_beatWidth = beatWidth; m_graphCache.clear(); repaint(); };
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int framesPerBeat() const { return m_framesPerBeat; }
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void setFramesPerBeat(int framesPerBeat) { m_framesPerBeat = framesPerBeat; m_graphCache.clear(); repaint(); }
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signals:
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void scratchBegin();
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void scratchSpeed(float speed);
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void scratchEnd();
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protected:
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void paintEvent(QPaintEvent *event) override;
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void mousePressEvent(QMouseEvent *event) override;
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void mouseReleaseEvent(QMouseEvent *event) override;
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void mouseMoveEvent(QMouseEvent *event) override;
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private slots:
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void timeout();
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private:
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QPixmap getPixmap(int index);
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QAudioBuffer m_buffer;
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std::ptrdiff_t m_position{};
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QCache<int, QPixmap> m_graphCache;
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int m_beatWidth{100};
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int m_framesPerBeat{frameRate/4};
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bool m_scratching{};
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bool m_dragging{};
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int m_mouseX;
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QDateTime m_timestamp;
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QTimer m_timer;
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};
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