TransferFunctionWidget Class Reference

This is a transfer function picker widget. More...

#include <TransferFunctionWidget.h>

List of all members.

Signals
void	colorsChanged ()

Public Member Functions
	TransferFunctionWidget (QWidget *parent)
	~TransferFunctionWidget (void)
void	setGradientStops (const QGradientStops &stops)
	Sets the gradient stops.
void	setHistogram (const std::vector< float > &hist)
	Sets the histogram.
QSize	sizeHint () const
QPolygonF	points () const
	Returns the positions of the opacity-points.
HoverPoints *	hoverPoints () const
void	paintEvent (QPaintEvent *)
uint	colorAt (int x)
	Returns the color at position x (RGBA)
void	resetPoints ()
	Resets the opacity points positions.
virtual void	resizeEvent (QResizeEvent *ev)

Private Member Functions
void	generateHistogramImage ()
	Generates the histogram image.
void	generateShade ()
	Generates the gradient image.
void	scaleHistogram ()
	scales our histogram, so that many values are visible

Private Attributes
std::vector< float >	_histogram
	Stores the histogram.
QImage	_histImage
	Stores the histogram image.
QImage	_shade
	Stores the background image.
HoverPoints *	_hoverPoints
	Stores the opacity-points.
QLinearGradient	_alphaGradient
	Stores a gradient consisting of the gradient-stops obtained from the GradientStopWidget by the setGradientStops method.

---

Detailed Description

This is a transfer function picker widget.

This is somewhat inspired from a QT gradient demo.

---

Constructor & Destructor Documentation

TransferFunctionWidget::TransferFunctionWidget

(

QWidget *

parent

)

TransferFunctionWidget::~TransferFunctionWidget

(

void

)

---

Member Function Documentation

uint TransferFunctionWidget::colorAt

(

int

x

)

Returns the color at position x (RGBA)

void TransferFunctionWidget::colorsChanged ( )

signal

void TransferFunctionWidget::generateHistogramImage ( )

private

Generates the histogram image.

void TransferFunctionWidget::generateShade ( )

private

Generates the gradient image.

HoverPoints* TransferFunctionWidget::hoverPoints ( ) const

inline

void TransferFunctionWidget::paintEvent

(

QPaintEvent *

)

QPolygonF TransferFunctionWidget::points

(

)

const

Returns the positions of the opacity-points.

void TransferFunctionWidget::resetPoints

(

)

Resets the opacity points positions.

void TransferFunctionWidget::resizeEvent ( QResizeEvent *  ev )

virtual

void TransferFunctionWidget::scaleHistogram ( )

private

scales our histogram, so that many values are visible

void TransferFunctionWidget::setGradientStops

(

const QGradientStops &

stops

)

Sets the gradient stops.

void TransferFunctionWidget::setHistogram

(

const std::vector< float > &

hist

)

Sets the histogram.

QSize TransferFunctionWidget::sizeHint ( ) const

inline

---

Member Data Documentation

QLinearGradient TransferFunctionWidget::_alphaGradient

private

Stores a gradient consisting of the gradient-stops obtained from the GradientStopWidget by the setGradientStops method.

QImage TransferFunctionWidget::_histImage

private

Stores the histogram image.

std::vector<float> TransferFunctionWidget::_histogram

private

Stores the histogram.

HoverPoints* TransferFunctionWidget::_hoverPoints

private

Stores the opacity-points.

QImage TransferFunctionWidget::_shade

private

Stores the background image.

---

The documentation for this class was generated from the following files:

• TransferFunctionWidget.h
• TransferFunctionWidget.cpp
• TransferFunctionWidget_moc.cpp