TransferPoint Class Reference

#include <TransferPoint.hpp>

Inherits QGraphicsItem.

Public Member Functions
	TransferPoint (qreal relX, qreal relY, qreal sigma=0.2)
QRectF	boundingRect () const
void	updateScene ()
void	paint (QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
void	setFixed (bool fixed)
void	setRelativePos (qreal x, qreal y)
qreal	getRelativeX ()
qreal	getRelativeY ()
qreal	getSigma ()
void	setSigma (qreal sigma)
void	setColor (QColor _color)
void	setColorFromDialog ()
QColor	getColor ()

Protected Member Functions
void	mousePressEvent (QGraphicsSceneMouseEvent *event)
void	mouseMoveEvent (QGraphicsSceneMouseEvent *event)

Detailed Description

Class which represents a point at the transfer function. Holds a color, alpha value and the position.

Author

Christian Hirsch

Clemens Roegner

Constructor & Destructor Documentation

TransferPoint::TransferPoint	(	qreal	relX,
		qreal	relY,
		qreal	sigma = 0.2
	)

Constructor. Creates a new point at the transfer function at the relative x and y position.

Parameters

relX	The relative x position. If position is 1.0 or 0.0 then the point can't be moved along the x axis.
relY	The relative y position. Represents the alpha value of a point.

Member Function Documentation

QRectF TransferPoint::boundingRect

(

)

const

Returns the bounding rectangle of the point.

Returns

The bounding rectangle of the point.

QColor TransferPoint::getColor

(

)

Getter for the color. return The representing color.

qreal TransferPoint::getRelativeX

(

)

Getter for relative x position.

Returns

Relative x position.

qreal TransferPoint::getRelativeY

(

)

Getter for relative y position.

Returns

Relative y position.

qreal TransferPoint::getSigma

(

)

Getter for sigma value.

Returns

Sigma value of control point.

void TransferPoint::mouseMoveEvent ( QGraphicsSceneMouseEvent *  event)

protected

Handles the mouse move event. Moves a point on the transfer widget.

void TransferPoint::mousePressEvent ( QGraphicsSceneMouseEvent *  event)

protected

Handles the mouse press event. (Nothing is done, but mousemove event needs this).

Parameters

event

Pointer to the called event.

void TransferPoint::paint	(	QPainter *	painter,
		const QStyleOptionGraphicsItem *	option,
		QWidget *	widget = 0
	)

Paints the point with a black bounding box, filled with its color, which is represented.

void TransferPoint::setColor

(

QColor

_color = Qt::white)

Sets the representing color of the point.

Parameters

_color

New representing color.

void TransferPoint::setColorFromDialog

(

)

Opens a color-dialog, in which the user can decide which color to use.

void TransferPoint::setFixed

(

bool

fixed)

Sets if a point is fixed (can't be moved along x axis) or not.

Parameters

fixed

If true, then the point is fixed.

void TransferPoint::setRelativePos	(	qreal	x,
		qreal	y
	)

Setter for the relative x and y Position, where x = 1.0 is the right side, and y = 1.0 is at the top.

Parameters

x	New relative x position.
y	New relative y position.

void TransferPoint::setSigma

(

qreal

sigma)

Setter for sigma value.

Parameters

sigma

Sigma value of control point.

void TransferPoint::updateScene

(

)

Redraws the scene of the transfer widget.

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

• C:/Development/workspace/Vis2/src/TransferPoint.hpp
• C:/Development/workspace/Vis2/src/TransferPoint.cpp