RulerWidget.h

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/******************************************************************************
 *
 *  Copyright (C) 2008 Boris Iven, Max Hermann
 *
 *  This file is part of the "CEDRIC Event Display" application.
 *
 *****************************************************************************/

#ifndef RULERWIDGET_H
#define RULERWIDGET_H

#include <QWidget>
#include <QSize>


class RulerWidget : public QWidget
{
        Q_OBJECT

public:
        enum Orientation { Horizontal, Vertical };

        RulerWidget( QWidget* parent=0, Orientation orient=Horizontal );
        
        virtual ~RulerWidget();
        
        void setOrientation( Orientation orient );
        
        void setRange( float min, float max, bool keepAutoRange=false );
        

        void setLimits( float floor, float ceil )
        {
                floorRange = floor;
                ceilRange = ceil;
                
                dynamicLimits = false;          
        }
        

        void setDynamicLimits( bool enable ) { dynamicLimits = enable; }
        

        void setDivisions( int divisions )      { fixedDivisions = divisions; }
        
        void enableAutoRange( bool enable=true ) { autoRange = enable; }

        QSize minimumSizeHint() const { return QSize( 20, 20 ); }

//protected: // should be protected, but used from outside (see MainWindow::selectEvent())      
        static float signum      ( float value );
        static int   digits      ( float value );
        static float ceilDecimal ( float value );
        static float floorDecimal( float value );
        static int   multiple    ( float value );

public slots:
        void setCurrentMarkerEnabled( bool enable ) { curMarkerEnabled = enable; }
        void setCurrentValue( float val ) { curVal = val; }
        
protected:
        void paintEvent( QPaintEvent* event );

private:
        Orientation orientation;
        bool autoRange;             
        bool dynamicLimits;         
        int  fixedDivisions;        
        
        float direction;            
        float minRange;             
        float maxRange;             
        float floorRange;           
        float ceilRange;            

        float curVal;               
        float curMarkerEnabled;     
};

#endif