cursorwindowslider.h

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#ifndef OPENSWMMVIS_UI_WIDGETS_CURSORWINDOWSLIDER_H
#define OPENSWMMVIS_UI_WIDGETS_CURSORWINDOWSLIDER_H
 
#include <QWidget>
 
namespace openswmmvis::ui {
 
class CursorWindowSlider : public QWidget
{
    Q_OBJECT
    Q_PROPERTY(qreal cursorNorm READ cursorNorm WRITE setCursorNorm NOTIFY cursorChanged)
    Q_PROPERTY(qreal windowNorm READ windowNorm WRITE setWindowNorm NOTIFY windowNormChanged)
public:
    explicit CursorWindowSlider(QWidget *parent = nullptr);
 
    qreal cursorNorm() const noexcept { return m_cursor; }
    qreal windowNorm() const noexcept { return m_windowNorm; }
 
    QSize sizeHint() const override { return {300, 20}; }
    QSize minimumSizeHint() const override { return {120, 20}; }
 
public slots:
    void setCursorNorm(qreal v);
 
    void setWindowNorm(qreal w);
 
signals:
    void cursorChanged(qreal cursorNorm);
    void cursorReleased(qreal cursorNorm);
    void windowNormChanged(qreal windowNorm);
 
protected:
    void paintEvent(QPaintEvent *e) override;
    void mousePressEvent(QMouseEvent *e) override;
    void mouseMoveEvent(QMouseEvent *e) override;
    void mouseReleaseEvent(QMouseEvent *e) override;
    void keyPressEvent(QKeyEvent *e) override;
 
private:
    int   trackLeft()   const noexcept;
    int   trackRight()  const noexcept;
    int   trackWidth()  const noexcept;
    qreal pixelToNorm(int px) const noexcept;
    int   normToPixel(qreal v) const noexcept;
    bool  overThumb(const QPoint &p) const noexcept;
 
    qreal m_cursor     = 0.0;
    qreal m_windowNorm = 0.0;
    bool  m_dragging   = false;
};
 
} // namespace openswmmvis::ui
 
#endif // OPENSWMMVIS_UI_WIDGETS_CURSORWINDOWSLIDER_H