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scrollbar.h
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scrollbar.h
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////////////////////////////////////////////////////////////////////////////////
// Name: scrollbar.h
// Purpose: Declaration of class ScrollBar
// Author: Anton van Wezenbeek
// Copyright: (c) 2017 Anton van Wezenbeek
////////////////////////////////////////////////////////////////////////////////
#pragma once
#include <QScrollBar>
/// This class offers a scrollbar to be used on the plot.
class ScrollBar: public QScrollBar
{
Q_OBJECT
public:
enum ScrollBarPosition
{
AttachedToScale,
OppositeToScale
};
/// Constructor.
ScrollBar( ScrollBarPosition pos, Qt::Orientation, QWidget* parent);
int extent() const;
/// Access to members.
auto minBaseValue() const {return m_minBase;};
double minSliderValue() const;
auto maxBaseValue() const {return m_maxBase;};
double maxSliderValue() const;
auto mode() const {return m_mode;};
auto position() const {return m_position;};
void moveSlider( double min, double max );
void setBase( double min, double max );
signals:
void sliderMoved( Qt::Orientation, double, double );
void valueChanged( Qt::Orientation, double, double );
private slots:
void catchSliderMoved( int value );
void catchValueChanged( int value );
private:
double mapFromTick( int ) const;
int mapToTick( double ) const;
void sliderRange( int value, double &min, double &max ) const;
const int m_baseTicks = 1000000;
const bool m_inverted;
const Qt::ScrollBarPolicy m_mode = Qt::ScrollBarAsNeeded;
const ScrollBarPosition m_position;
double m_maxBase = 1.0;
double m_minBase = 0.0;
};