GraphDisplayWidget is used to manage a Widget to display a graph with nodes and links onto a 2D canvas. More...

Public Slots
void	setSelectedLink (const void *link)
	Specify to the view that a link was selected.
void	setSelectedNode (const void *node)
	Specify to the view that a node was selected.
void	updateView ()
	Get the selection of nodes and links from the 2D canvas.

Signals
void	linkDoubleClicked (const void *node)
	link was double clicked
void	linkSelectionChanged (const void *link)
	Signal emitted when a link was selected in the 2D canvas It sends the pointer to the object represented by the link.
void	nodeDoubleClicked (const void *node)
	node was double clicked
void	nodeSelectionChanged (const void *node)
	Signal emitted when a node was selected in the 2D canvas It sends the pointer to the object represented by the node.

Public Member Functions
void	addLink (const void ptr, const void from, const void *to, QString tooltip, const QPen &pen, bool arrowHead)
	Add a link in the graph.
void	addNode (const void *ptr, QString tooltip, QColor color, QColor lineColor, QString internalText="")
	Add a node to the graph.
void	autoScale ()
	Resize the content of the canvas to the size of the widget.
void	clear ()
	Empty all nodes and links.
	GraphDisplayWidget (QWidget *parent=nullptr)
	constructor (build the scene and connect signals/slots)
void	refresh ()
	Refresh the 2D canvas display.
void	setNodeDiameter (float d)
	Set the diameter of nodes' graphical representation.
virtual	~GraphDisplayWidget ()
	destructor

Protected Member Functions
void	mouseDoubleClickEvent (QMouseEvent *) override
	process double clicked nodes and link
void	mouseReleaseEvent (QMouseEvent *e) override
void	resizeEvent (QResizeEvent *) override
	make sure the scene fit the new size entirely

Detailed Description

GraphDisplayWidget is used to manage a Widget to display a graph with nodes and links onto a 2D canvas.

It's inherits from QGraphicsView.

It is used by TransformationExplorer to display the graph of FrameOfReference and Transformation but is not aware of the object that are managed graphically (all managed using const void*)

Constructor & Destructor Documentation

GraphDisplayWidget::GraphDisplayWidget ( QWidget * parent = nullptr )

constructor (build the scene and connect signals/slots)

GraphDisplayWidget::~GraphDisplayWidget ( )

virtual

destructor

void GraphDisplayWidget::addLink	(	const void *	ptr,
		const void *	from,
		const void *	to,
		QString	tooltip,
		const QPen &	pen,
		bool	arrowHead )

Add a link in the graph.

Parameters

ptr	a pointer to the object that is represented by this link.
from	a pointer to the object represented as a node (and added before by addNode) that this links from
to	a pointer to the object represented as a node (and added before by addNode) that this links to
tooltip	The tooltip to be displayed when the mouse hovers over the link
pen	The pen used to draw the line (color, brush, width...)
arrowHead	if true adds an arrow pointing to the to object

void GraphDisplayWidget::addNode	(	const void *	ptr,
		QString	tooltip,
		QColor	color,
		QColor	lineColor,
		QString	internalText = "" )

Add a node to the graph.

Parameters

ptr	the Object referred to by the node
tooltip	The tooltip to be displayed when the mouse hovers over the node
color	The color of the disc representing the node
lineColor	The color of the circle around the disc
internalText	Text to display inside the node (can be any UTF-8 character)