scrollbar.h

QWT5.01用于Qt开发的二维图形库程序

#ifndef _SCROLLBAR_H
#define _SCROLLBAR_H 1

#include <qscrollbar.h>

class ScrollBar: public QScrollBar
{
    Q_OBJECT

public:
    ScrollBar(QWidget *parent = NULL);
    ScrollBar(Qt::Orientation, QWidget *parent = NULL);
    ScrollBar(double minBase, double maxBase,       
        Qt::Orientation o, QWidget *parent = NULL);

    void setInverted(bool);
    bool isInverted() const;

    double minBaseValue() const;
    double maxBaseValue() const;

    double minSliderValue() const;
    double maxSliderValue() const;

    int extent() const;

signals:
    void sliderMoved(Qt::Orientation, double, double);
    void valueChanged(Qt::Orientation, double, double);

public slots:
    virtual void setBase(double min, double max);
    virtual void moveSlider(double min, double max);

protected:
    void sliderRange(int value, double &min, double &max) const;
    int mapToTick(double) const;
    double mapFromTick(int) const;

private slots:
    void catchValueChanged(int value);
    void catchSliderMoved(int value);

private:
    void init();

    bool d_inverted;
    double d_minBase;
    double d_maxBase;
    int d_baseTicks;
};

#endif