ConnectionGraphicsItem Class Reference

Class for graphical representation of connections in the node framework. More...

#include <ConnectionGraphicsItem.h>

Collaboration diagram for ConnectionGraphicsItem:

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List of all members.

Signals

void nodeGraphicsItemSelected (const QString &name)

void destroyed (Connection *connection)

Signal that is emitted when the connection item is being destroyed.

void destroyed (ConnectionGraphicsItem *connectionItem)

Signal that is emitted when the connection item is being destroyed.

Public Member Functions

ConnectionGraphicsItem (const QString &name, const QColor &color, const QPointF &startPoint, const QPointF &endPoint)

Constructor of the ConnectionGraphicsItem class.

~ConnectionGraphicsItem ()

Destructor of the ConnectionGraphicsItem class.

virtual QRectF boundingRect () const

Returns the bounding rectangle of the graphics item.

virtual QPainterPath shape () const

Returns the shape path of an item.

void setEnabled (bool enabled)

Enables or disables the graphics item.

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

Paints the graphics item into a graphics view.

void updatePath ()

Updates the path end points according to the positions of start and end nodes.

Connection * getConnection () const

Returns the Connection object that the connection graphics item represents.

void setConnection (Connection *connection)

Sets the Connection object that the connection graphics item represents.

NodeGraphicsItem * getStartNodeItem ()

Gets the startnode of the connection.

void setStartNodeItem (NodeGraphicsItem *item)

Sets the startnode of the connection.

NodeGraphicsItem * getEndNodeItem () const

Gets the endnode of the connection.

void setEndNodeItem (NodeGraphicsItem *item)

Sets the endnode of the connection.

QPointF getStartPoint () const

Gets the start point of the connection.

void setStartPoint (const QPointF &startPos)

Sets the start point of the connection.

QPointF getEndPoint () const

Gets the end point of the connection.

void setEndPoint (const QPointF &endPos)

Sets the end point of the connection.

void updatePosition (const QPointF &scenePosition)

Updates the position of an end point for a connection that is currently being created.

Static Public Member Functions

static ConnectionGraphicsItem * getTempItem ()

Returns the temporary Connection object that is used when creating a connection between nodes.

static void setTempItem (ConnectionGraphicsItem *connection)

Sets the temporary Connection object that is used when creating a connection between nodes to the given object.

static bool isConnectionCreated ()

Returns whether a connection between nodes is currently being created.

Protected Member Functions

void hoverEnterEvent (QGraphicsSceneHoverEvent *event)

Process hover enter events.

void hoverLeaveEvent (QGraphicsSceneHoverEvent *event)

Process hover leave events.

Private Member Functions

void setTemp (bool temp)

Private Attributes

QString m_name

The name of the connection.

QColor m_color

The color to use for painting the item.

QPainterPath m_mainPath

The path to use for painting the curved path.

QPainterPath m_shadowPath

The path to use for painting the shadow of the curved path.

QPolygonF m_arrowHeadPolygon

The arrow head shape to use for painting the item.

QPainterPath m_shapePath

The path to return when the shape of the item is requested.

QPointF m_startPoint

The start point of the path.

QPointF m_endPoint

The end point of the path.

bool m_selfInitiated

Flag that states whether a current update has been initiated by this object itself.

Connection * m_connection

Pointer to Connection. (Deprecated.).

QMap< QString, Connection * > m_connections

List of Connections.

NodeGraphicsItem * m_startNodeItem

Pointer to NodeGraphicsItem.

NodeGraphicsItem * m_endNodeItem

Pointer to NodeGraphicsItem.

bool m_temp

Flag for temporary connection item.

bool m_hovered

Flag for mouse hovers over item.

Static Private Attributes

static ConnectionGraphicsItem * s_tempItem = 0

Temporary Connection object that is used when creating a connection between nodes.

Detailed Description

Class for graphical representation of connections in the node framework.

Inheritance Diagram

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Constructor & Destructor Documentation

ConnectionGraphicsItem::ConnectionGraphicsItem	(	const QString &	name,
		const QColor &	color,
		const QPointF &	startPoint,
		const QPointF &	endPoint
	)

Constructor of the ConnectionGraphicsItem class.

Constructors and Destructors.

Parameters:

	name	The name of the item.
	color	The color to use for painting the item.
	startPoint	The point where the connection line begins.
	endPoint	The point where the connection line ends.

Constructor of the ConnectionGraphicsItem class.

Parameters:

	name	The name of the item.
	color	The color to use for painting the item.
	startPoint	The point where the connection line begins.
	endPoint	The point where the connection line ends.

ConnectionGraphicsItem::~ConnectionGraphicsItem ( )

Destructor of the ConnectionGraphicsItem class.

Member Function Documentation

ConnectionGraphicsItem * ConnectionGraphicsItem::getTempItem ( ) [static]

Returns the temporary Connection object that is used when creating a connection between nodes.

Public Static Functions.

Returns:: The temporary Connection object that is used when creating a connection between nodes.

Returns the temporary Connection object that is used when creating a connection between nodes.

Returns:: The temporary Connection object that is used when creating a connection between nodes.

void ConnectionGraphicsItem::setTempItem ( ConnectionGraphicsItem * item ) [static]

Sets the temporary Connection object that is used when creating a connection between nodes to the given object.

Parameters:

	connection	The temporary Connection object that is used when creating a connection between nodes.
	item	The temporary Connection object that is used when creating a connection between nodes.

bool ConnectionGraphicsItem::isConnectionCreated ( ) [static]

Returns whether a connection between nodes is currently being created.

Returns:: True if a connection between nodes is currently being created, otherwise False.

QRectF ConnectionGraphicsItem::boundingRect ( ) const [virtual]

Returns the bounding rectangle of the graphics item.

Public Slots.

Returns:: The bounding rectangle of the graphics item.

Public Functions Returns the bounding rectangle of the graphics item.

Returns:: The bounding rectangle of the graphics item.

QPainterPath ConnectionGraphicsItem::shape ( ) const [virtual]

Returns the shape path of an item.

Returns the shape of the item as QPainterPath.

Parameters:

The

shape of the item as QPainterPath.

void ConnectionGraphicsItem::setEnabled ( bool enabled )

Enables or disables the graphics item.

Parameters:

enabled

The new enabled state for the item.

void ConnectionGraphicsItem::paint	(	QPainter *	painter,
		const QStyleOptionGraphicsItem *	option,
		QWidget *	widget = `0`
	)			`[virtual]`

Paints the graphics item into a graphics view.

Parameters:

	painter	The object to use for painting.
	option	Style options for painting the graphics item.
	widget	The widget into which to paint the graphics item.

void ConnectionGraphicsItem::updatePath ( )

Updates the path end points according to the positions of start and end nodes.

Connection * ConnectionGraphicsItem::getConnection ( ) const

Returns the Connection object that the connection graphics item represents.

Returns:: The Connection object that the connection graphics item represents.

void ConnectionGraphicsItem::setConnection ( Connection * connection )

Sets the Connection object that the connection graphics item represents.

Parameters:

connection

The Connection object that the connection graphics item represents.

NodeGraphicsItem * ConnectionGraphicsItem::getStartNodeItem ( )

Gets the startnode of the connection.

void ConnectionGraphicsItem::setStartNodeItem ( NodeGraphicsItem * item )

Sets the startnode of the connection.

NodeGraphicsItem * ConnectionGraphicsItem::getEndNodeItem ( ) const

Gets the endnode of the connection.

void ConnectionGraphicsItem::setEndNodeItem ( NodeGraphicsItem * item )

Sets the endnode of the connection.

QPointF ConnectionGraphicsItem::getStartPoint ( ) const

Gets the start point of the connection.

Gets the startpoint of the connection.

void ConnectionGraphicsItem::setStartPoint ( const QPointF & startPos )

Sets the start point of the connection.

QPointF ConnectionGraphicsItem::getEndPoint ( ) const

Gets the end point of the connection.

Gets the endpoint of the connection.

void ConnectionGraphicsItem::setEndPoint ( const QPointF & endPos )

Sets the end point of the connection.

void ConnectionGraphicsItem::updatePosition ( const QPointF & scenePosition )

Updates the position of an end point for a connection that is currently being created.

Parameters:

scenePosition

The position of the mouse pointer over the graphics view in scene coordinates.

void ConnectionGraphicsItem::nodeGraphicsItemSelected ( const QString & name ) [signal]

void ConnectionGraphicsItem::destroyed ( Connection * connection ) [signal]

Signal that is emitted when the connection item is being destroyed.

void ConnectionGraphicsItem::destroyed ( ConnectionGraphicsItem * connectionItem ) [signal]

Signal that is emitted when the connection item is being destroyed.

void ConnectionGraphicsItem::hoverEnterEvent ( QGraphicsSceneHoverEvent * event ) [protected]

Process hover enter events.

Protected Functions.

void ConnectionGraphicsItem::hoverLeaveEvent ( QGraphicsSceneHoverEvent * event ) [protected]

Process hover leave events.

void ConnectionGraphicsItem::setTemp ( bool temp ) [private]

Sets the temp flag of the connection.

Private Functions Sets the temp flag.

Member Data Documentation

ConnectionGraphicsItem * ConnectionGraphicsItem::s_tempItem = 0 [static, private]

Temporary Connection object that is used when creating a connection between nodes.

Private Static Data.

Temporary Connection object that is created when a connection is set up.

QString ConnectionGraphicsItem::m_name [private]

The name of the connection.

QColor ConnectionGraphicsItem::m_color [private]

The color to use for painting the item.

QPainterPath ConnectionGraphicsItem::m_mainPath [private]

The path to use for painting the curved path.

QPainterPath ConnectionGraphicsItem::m_shadowPath [private]

The path to use for painting the shadow of the curved path.

QPolygonF ConnectionGraphicsItem::m_arrowHeadPolygon [private]

The arrow head shape to use for painting the item.

QPainterPath ConnectionGraphicsItem::m_shapePath [private]

The path to return when the shape of the item is requested.

QPointF ConnectionGraphicsItem::m_startPoint [private]

The start point of the path.

QPointF ConnectionGraphicsItem::m_endPoint [private]

The end point of the path.

bool ConnectionGraphicsItem::m_selfInitiated [private]

Flag that states whether a current update has been initiated by this object itself.

Connection* ConnectionGraphicsItem::m_connection [private]

Pointer to Connection. (Deprecated.).

QMap<QString, Connection *> ConnectionGraphicsItem::m_connections [private]

List of Connections.

NodeGraphicsItem* ConnectionGraphicsItem::m_startNodeItem [private]

Pointer to NodeGraphicsItem.

NodeGraphicsItem* ConnectionGraphicsItem::m_endNodeItem [private]

Pointer to NodeGraphicsItem.

bool ConnectionGraphicsItem::m_temp [private]

Flag for temporary connection item.

bool ConnectionGraphicsItem::m_hovered [private]

Flag for mouse hovers over item.

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


Signals
void	nodeGraphicsItemSelected (const QString &name)
void	destroyed (Connection *connection)
	Signal that is emitted when the connection item is being destroyed.
void	destroyed (ConnectionGraphicsItem *connectionItem)
	Signal that is emitted when the connection item is being destroyed.
Public Member Functions
	ConnectionGraphicsItem (const QString &name, const QColor &color, const QPointF &startPoint, const QPointF &endPoint)
	Constructor of the ConnectionGraphicsItem class.
	~ConnectionGraphicsItem ()
	Destructor of the ConnectionGraphicsItem class.
virtual QRectF	boundingRect () const
	Returns the bounding rectangle of the graphics item.
virtual QPainterPath	shape () const
	Returns the shape path of an item.
void	setEnabled (bool enabled)
	Enables or disables the graphics item.
virtual void	paint (QPainter painter, const QStyleOptionGraphicsItem option, QWidget *widget=0)
	Paints the graphics item into a graphics view.
void	updatePath ()
	Updates the path end points according to the positions of start and end nodes.
Connection *	getConnection () const
	Returns the Connection object that the connection graphics item represents.
void	setConnection (Connection *connection)
	Sets the Connection object that the connection graphics item represents.
NodeGraphicsItem *	getStartNodeItem ()
	Gets the startnode of the connection.
void	setStartNodeItem (NodeGraphicsItem *item)
	Sets the startnode of the connection.
NodeGraphicsItem *	getEndNodeItem () const
	Gets the endnode of the connection.
void	setEndNodeItem (NodeGraphicsItem *item)
	Sets the endnode of the connection.
QPointF	getStartPoint () const
	Gets the start point of the connection.
void	setStartPoint (const QPointF &startPos)
	Sets the start point of the connection.
QPointF	getEndPoint () const
	Gets the end point of the connection.
void	setEndPoint (const QPointF &endPos)
	Sets the end point of the connection.
void	updatePosition (const QPointF &scenePosition)
	Updates the position of an end point for a connection that is currently being created.
Static Public Member Functions
static ConnectionGraphicsItem *	getTempItem ()
	Returns the temporary Connection object that is used when creating a connection between nodes.
static void	setTempItem (ConnectionGraphicsItem *connection)
	Sets the temporary Connection object that is used when creating a connection between nodes to the given object.
static bool	isConnectionCreated ()
	Returns whether a connection between nodes is currently being created.
Protected Member Functions
void	hoverEnterEvent (QGraphicsSceneHoverEvent *event)
	Process hover enter events.
void	hoverLeaveEvent (QGraphicsSceneHoverEvent *event)
	Process hover leave events.
Private Member Functions
void	setTemp (bool temp)
Private Attributes
QString	m_name
	The name of the connection.
QColor	m_color
	The color to use for painting the item.
QPainterPath	m_mainPath
	The path to use for painting the curved path.
QPainterPath	m_shadowPath
	The path to use for painting the shadow of the curved path.
QPolygonF	m_arrowHeadPolygon
	The arrow head shape to use for painting the item.
QPainterPath	m_shapePath
	The path to return when the shape of the item is requested.
QPointF	m_startPoint
	The start point of the path.
QPointF	m_endPoint
	The end point of the path.
bool	m_selfInitiated
	Flag that states whether a current update has been initiated by this object itself.
Connection *	m_connection
	Pointer to Connection. (Deprecated.).
QMap< QString, Connection * >	m_connections
	List of Connections.
NodeGraphicsItem *	m_startNodeItem
	Pointer to NodeGraphicsItem.
NodeGraphicsItem *	m_endNodeItem
	Pointer to NodeGraphicsItem.
bool	m_temp
	Flag for temporary connection item.
bool	m_hovered
	Flag for mouse hovers over item.
Static Private Attributes
static ConnectionGraphicsItem *	s_tempItem = 0
	Temporary Connection object that is used when creating a connection between nodes.