RulerWidget Class Reference

Simple ruler widget. More...

#include <RulerWidget.h>

Inheritance diagram for RulerWidget:

Public Types
enum	Orientation { Horizontal, Vertical }

Public Slots
void	setCurrentMarkerEnabled (bool enable)
void	setCurrentValue (float val)

Public Member Functions
	RulerWidget (QWidget *parent=0, Orientation orient=Horizontal)
virtual	~RulerWidget ()
void	setOrientation (Orientation orient)
	Set orientation of ruler, either Ruler::Horizontal or Ruler::Vertical. More...
void	setRange (float min, float max, bool keepAutoRange=false)
	Set current visible range of ruler. More...
void	setLimits (float floor, float ceil)
	Set absolute minimum and maximum value of ruler (disables dynamicLimits) More...
void	setDynamicLimits (bool enable)
	Enable/Disable dynamicLimits calculation. More...
void	setDivisions (int divisions)
	Set number of markers between floorRange and ceilRange. More...
void	enableAutoRange (bool enable=true)
	Enable to map ruler 1:1 to pixelsize. More...
QSize	minimumSizeHint () const

Static Public Member Functions
Arithmetic Helpers
Returns sign of value
static float	signum (float value)
static int	digits (float value)
	Returns number of decimal digits. More...
static float	ceilDecimal (float value)
	Returns upper "whole" decimal value (e.g. ceilDecimal(157)=200) More...
static float	floorDecimal (float value)
	Returns lower "whole" decimal value (e.g. ceilDecimal(157)=100) More...
static int	multiple (float value)
	Returns signed highest digit of value (e.g. ceilDecimal(-751)=-7) More...

Protected Member Functions
void	paintEvent (QPaintEvent *event)

Detailed Description

Simple ruler widget.

Author

Max Hermann <mhermann[at]mail.cern.ch>

Member Enumeration Documentation

enum RulerWidget::Orientation

Enumerator
Horizontal
Vertical

Constructor & Destructor Documentation

RulerWidget::RulerWidget	(	QWidget *	parent = 0,
		Orientation	orient = Horizontal
	)

References setOrientation().

RulerWidget::~RulerWidget ( )

virtual

Member Function Documentation

float RulerWidget::ceilDecimal ( float  value )

static

Returns upper "whole" decimal value (e.g. ceilDecimal(157)=200)

References digits(), multiple(), and signum().

Referenced by paintEvent(), setRange(), and EventViewerWidget::setScenegraph().

int RulerWidget::digits ( float  value )

static

Returns number of decimal digits.

Referenced by ceilDecimal(), floorDecimal(), and multiple().

void RulerWidget::enableAutoRange ( bool  enable = true )

inline

Enable to map ruler 1:1 to pixelsize.

float RulerWidget::floorDecimal ( float  value )

static

Returns lower "whole" decimal value (e.g. ceilDecimal(157)=100)

References digits(), multiple(), and signum().

Referenced by setRange().

QSize RulerWidget::minimumSizeHint ( ) const

inline

int RulerWidget::multiple ( float  value )

static

Returns signed highest digit of value (e.g. ceilDecimal(-751)=-7)

References digits().

Referenced by ceilDecimal(), floorDecimal(), and EventViewerWidget::setScenegraph().

void RulerWidget::paintEvent ( QPaintEvent *  event )

protected

Todo:

Could painter.setWindow(minRange,0,maxRange,1) simplify the calculations here?

Remove while() loop for subdivision (plus make usage more coherent, its musguiding that subdivision is only done when fixedDivision is active!)

Only draw visible part of ruler

References ceilDecimal(), Horizontal, and setRange().

void RulerWidget::setCurrentMarkerEnabled ( bool  enable )

inlineslot

Referenced by EventViewerWidget::enterEvent(), and EventViewerWidget::leaveEvent().

void RulerWidget::setCurrentValue ( float  val )

inlineslot

Referenced by EventViewerWidget::setPosition().

void RulerWidget::setDivisions ( int  divisions )

inline

Set number of markers between floorRange and ceilRange.

Should be used together with setRange() to achieve a nice placement of the ruler markers (0...100...200...).

Referenced by EventViewerWidget::setScenegraph().

void RulerWidget::setDynamicLimits ( bool  enable )

inline

Enable/Disable dynamicLimits calculation.

See Also

setLimits()

void RulerWidget::setLimits ( float  floor, float  ceil  )

inline

Set absolute minimum and maximum value of ruler (disables dynamicLimits)

Should be used together with setDivisions() to achieve a nice placement of the ruler markers (0...100...200...).

Call setDynamicLimits(true) to enable dynamicLimits again.

Referenced by EventViewerWidget::setScenegraph().

void RulerWidget::setOrientation

(

Orientation

orient

)

Set orientation of ruler, either Ruler::Horizontal or Ruler::Vertical.

References Horizontal.

Referenced by EventViewerWidget::EventViewerWidget(), and RulerWidget().

void RulerWidget::setRange	(	float	min,
		float	max,
		bool	keepAutoRange = false
	)

Set current visible range of ruler.

References ceilDecimal(), and floorDecimal().

Referenced by paintEvent(), and EventViewerWidget::updateRuler().

float RulerWidget::signum ( float  value )

static

Referenced by ceilDecimal(), and floorDecimal().