Move source files to src directory

src/stfslider.h

@@ -0,0 +1,36 @@
+#ifndef STFSLIDER_H
+#define STFSLIDER_H
+
+#include <QObject>
+#include <QWidget>
+
+class STFSlider : public QWidget
+{
+    Q_OBJECT
+    float m_blackPoint;
+    float m_midPoint;
+    float m_whitePoint;
+    int m_grabbed;
+    bool m_fineTune;
+    float m_fineTuneX;
+    QColor m_color;
+    float m_threshold;
+    Qt::Orientations m_orientation = Qt::Horizontal;
+public:
+    explicit STFSlider(const QColor &color = Qt::white, QWidget *parent = nullptr);
+    float blackPoint() const;
+    float midPoint() const;
+    float whitePoint() const;
+    void setMTFParams(float low, float mid, float high);
+public slots:
+    void orientationChanged(Qt::Orientations orientation);
+signals:
+    void paramChanged(float blackPoint, float midPoint, float whitePoint);
+protected:
+    void paintEvent(QPaintEvent *event) override;
+    void mouseMoveEvent(QMouseEvent *event) override;
+    void mousePressEvent(QMouseEvent *event) override;
+    void mouseReleaseEvent(QMouseEvent *) override;
+};
+
+#endif // STFSLIDER_H