inviwo::TFEditorPrimitive Class Reference

Inheritance diagram for inviwo::TFEditorPrimitive:

Public Types
enum	ItemType {   TFEditorUnknownPrimitiveType = 30, TFEditorControlPointType, TFControlPointConnectionType, TFEditorIsovalueType,   Number_of_InviwoWidgetGraphicsItemTypes }

Public Member Functions
	TFEditorPrimitive (TFPrimitive &primitive, QGraphicsScene *scene=nullptr, const vec2 &pos=vec2(), double size=14.0)
TFPrimitive &	getPrimitive ()
const TFPrimitive &	getPrimitive () const
void	setPosition (double pos)
double	getPosition () const
void	setColor (const vec4 &color)
void	setColor (const vec3 &color)
void	setAlpha (float alpha)
const vec4 &	getColor () const
void	setTFPosition (const dvec2 &tfpos)
virtual const QPointF &	getCurrentPos () const
void	setSize (double s)
double	getSize () const
void	setHovered (bool hover)
void	beginMouseDrag ()
void	stopMouseDrag ()
Public Member Functions inherited from inviwo::Observable< TFEditorPrimitiveObserver >
	Observable (const Observable< TFEditorPrimitiveObserver > &other)
	Observable (Observable< TFEditorPrimitiveObserver > &&other)
Observable< TFEditorPrimitiveObserver > &	operator= (const Observable< TFEditorPrimitiveObserver > &other)
Observable< TFEditorPrimitiveObserver > &	operator= (Observable< TFEditorPrimitiveObserver > &&other)
void	addObserver (TFEditorPrimitiveObserver *observer)
void	removeObserver (TFEditorPrimitiveObserver *observer)
virtual void	startBlockingNotifications () override final
virtual void	stopBlockingNotifications () override final

Protected Member Functions
virtual void	paint (QPainter *painter, const QStyleOptionGraphicsItem *options, QWidget *widget) override
virtual QVariant	itemChange (GraphicsItemChange change, const QVariant &value) override
virtual void	hoverEnterEvent (QGraphicsSceneHoverEvent *event) override
virtual void	hoverLeaveEvent (QGraphicsSceneHoverEvent *event) override
virtual void	mouseDoubleClickEvent (QGraphicsSceneMouseEvent *event) override
virtual void	paintPrimitive (QPainter *painter)=0
virtual QPointF	prepareItemPositionChange (const QPointF &pos)
virtual void	onItemPositionChange (const vec2 &)
virtual void	onItemSceneHasChanged ()
Protected Member Functions inherited from inviwo::Observable< TFEditorPrimitiveObserver >
void	forEachObserver (C callback)
Protected Member Functions inherited from inviwo::ObservableInterface
void	addObservationHelper (Observer *observer)
void	removeObservationHelper (Observer *observer)

Protected Attributes
int	defaultZValue_ = 10
double	size_
bool	isEditingPoint_
QPointF	currentPos_
	position within scene rect (not normalized)
bool	hovered_
TFPrimitive &	data_

Friends
IVW_MODULE_QTWIDGETS_API bool	operator== (const TFEditorPrimitive &lhs, const TFEditorPrimitive &rhs)
IVW_MODULE_QTWIDGETS_API bool	operator< (const TFEditorPrimitive &lhs, const TFEditorPrimitive &rhs)

Constructor & Destructor Documentation

TFEditorPrimitive()

inviwo::TFEditorPrimitive::TFEditorPrimitive	(	TFPrimitive &	primitive,
		QGraphicsScene *	scene = nullptr,
		const vec2 &	pos = vec2(),
		double	size = 14.0
	)

Constructs a TransferFunction editor primitive. The graphics item is positioned at the primitive location (scalar value and opacity) within the scene. The graphical representation should thus be centered around (0,0) in local coordinates.

Parameters

primitive	pointer to the primitive
scene	item will be added to this QGraphicsScene
pos	normalized position of primitive (scalar value and opacity)
size	base size of primitive

Member Function Documentation

onItemPositionChange()

virtual void inviwo::TFEditorPrimitive::onItemPositionChange ( const vec2 &  )

inlineprotectedvirtual

gets called in itemChange() after a position change of the item. The position is already adjusted to lie within the scene bounding box and normalized.

Parameters

newPos

new, normalized position of the primitive

onItemSceneHasChanged()

virtual void inviwo::TFEditorPrimitive::onItemSceneHasChanged ( )

inlineprotectedvirtual

gets called in itemChange() when a scene change has happend

paint()

void inviwo::TFEditorPrimitive::paint ( QPainter *  painter, const QStyleOptionGraphicsItem *  options, QWidget *  widget  )

overrideprotectedvirtual

paints the primitive and the label if visible. Pen and brush are set up prior calling paintPrimitive() reflecting primitive color and selection.

paintPrimitive()

virtual void inviwo::TFEditorPrimitive::paintPrimitive ( QPainter *  painter )

protectedpure virtual

draws the primitive. Gets called from within paint()

Parameters

painter

painter for drawing the object, pen and brush are set up to match primitive color and selection status

prepareItemPositionChange()

virtual QPointF inviwo::TFEditorPrimitive::prepareItemPositionChange ( const QPointF &  pos )

inlineprotectedvirtual

Allows to adjust the position prior updating the graphicsitem position, e.g. when the movement of a TF point is restricted ("restrict" or "push"). This function is called in itemChange() before calling onItemPositionChange.

Parameters

pos	candidate for new position (in scene coords)

Returns

modified position which is used instead of pos

setTFPosition()

void inviwo::TFEditorPrimitive::setTFPosition

(

const dvec2 &

tfpos

)

set the position of the primitive using normalized coordinates within the transfer function.

Parameters

tfpos

normalized position [0,1] corresponding to scalar value and opacity

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

• tfeditorprimitive.h
• tfeditorprimitive.cpp