#include <GlMainWidget.h>

Inherits QGLWidget.

Public Types
enum	RenderingOption { RenderScene =0x1, SwapBuffers =0x2 }

Public Slots
void	centerScene (bool graphChanged=false, float zoomFactor=1.0)

void	closeEvent (QCloseEvent *e)

void	draw (bool graphChanged=true)

void	emitGraphChanged ()

void	redraw ()

Signals
void	closing (GlMainWidget , QCloseEvent )

void	glResized (int w, int h)

void	graphChanged ()

void	viewDrawn (GlMainWidget *glWidget, bool graphChanged)

void	viewRedrawn (GlMainWidget *glWidget)

Public Member Functions
	GlMainWidget (QWidget parent=NULL, View view=NULL)

bool	advancedAntiAliasingActivated () const

void	computeInteractors ()

void	createPicture (const std::string &pictureName, int width, int height, bool center=true)

QImage	createPicture (int width, int height, bool center=true)

QGLFramebufferObject *	createTexture (const std::string &textureName, int width, int height)

void	doSelect (const int x, const int y, const int width, const int height, std::vector< tlp::node > &sNode, std::vector< tlp::edge > &sEdge, tlp::GlLayer *layer=NULL)

bool	doSelect (const int x, const int y, tlp::ElementType &type, tlp::node &n, tlp::edge &e, tlp::GlLayer *layer=NULL)

void	drawInteractors ()

tlp::GlScene *	getScene ()

virtual QImage	grabFrameBuffer (bool withAlpha=false)

bool	keepScenePointOfViewOnSubgraphChanging () const

virtual void	makeCurrent ()

bool	outputEPS (int size, int doSort, const char *filename)

bool	outputSVG (int size, const char *filename)

bool	pickGlEntities (const int x, const int y, const int width, const int height, std::vector< SelectedEntity > &pickedEntities, tlp::GlLayer *layer=NULL)

bool	pickGlEntities (const int x, const int y, std::vector< SelectedEntity > &pickedEntities, tlp::GlLayer *layer=NULL)

void	pickNodesEdges (const int x, const int y, const int width, const int height, std::vector< SelectedEntity > &selectedNodes, std::vector< SelectedEntity > &selectedEdges, tlp::GlLayer *layer=NULL, bool pickNodes=true, bool pickEdges=true)

bool	pickNodesEdges (const int x, const int y, SelectedEntity &selectedEntity, tlp::GlLayer *layer=NULL, bool pickNodes=true, bool pickEdges=true)

void	render (RenderingOptions options=RenderingOptions(RenderScene\|SwapBuffers), bool checkVisibility=true)

void	resizeGL (int w, int h)

int	screenToViewport (int l)

double	screenToViewport (double l)

Coord	screenToViewport (Coord point)

bool	selectGlEntities (const int x, const int y, const int width, const int height, std::vector< GlSimpleEntity * > &pickedEntities, tlp::GlLayer *layer=NULL)

bool	selectGlEntities (const int x, const int y, std::vector< GlSimpleEntity * > &pickedEntities, tlp::GlLayer *layer=NULL)

void	setAdvancedAntiAliasing (bool advancedAntiAliasing)

void	setKeepScenePointOfViewOnSubgraphChanging (bool)

double	viewportToScreen (double l)

Coord	viewportToScreen (Coord point)

Static Public Member Functions
static void	clearFirstQGLWidget ()

static QGLWidget *	getFirstQGLWidget ()

static void	getTextureRealSize (int width, int height, int &textureRealWidth, int &textureRealHeight)

Protected Slots
void	paintEvent (QPaintEvent *)

Detailed Description

This widget provide a simple system to visualize data/graph with OpenGL 3D engine.

This widget is an interface between Qt Widget system and tulip OpenGL engine The central object of GlMainWidget is the GlScene member

See also: GlScene

To use this class you have to :

create a GlMainWidget
get the GlScene with getScene() function
add GlLayer and GlEntity to this scene
call centerScene() to compute a good GlCamera
see the result

See also: GlLayer; GlSimpleEntity

If you only want to visualize a graph, you can call the setGraph function

After scene construction you can perform some operation on GlMainWidget :

Selection with doSelect() and selectGlEntities()
Image output with getImage(), createPicture(), outputSVG() and outputEPS()
Texture output with createTexture()
others operation on GlScene and QGlWidget

Examples:: graph_display/graph_display.cpp.

Definition at line 67 of file GlMainWidget.h.

Member Enumeration Documentation

enum tlp::GlMainWidget::RenderingOption

Configure the rendering process ( see render function)

See also: render

Enumerator
SwapBuffers	Force to render the graph even if there is a previous buffered render. You need to call this option if the graph is updated to regenerate the buffer. If not set try to use the last buffered graph render, if there is no valid buffer this flag is forced.

Definition at line 75 of file GlMainWidget.h.

Constructor & Destructor Documentation

tlp::GlMainWidget::GlMainWidget	(	QWidget *	parent = `NULL`,
		View *	view = `NULL`
	)

Constructor of GlMainWidget.

Create a GlMainWidget with the GlScene associated to it

Parameters

parent	Qt Widget parent system
view	if you want to link this GlMainWidget to a view : use this parameter

Member Function Documentation

bool tlp::GlMainWidget::advancedAntiAliasingActivated ( ) const

inline

Returns the advanced anti-aliasing technique state

Definition at line 384 of file GlMainWidget.h.

void tlp::GlMainWidget::centerScene	(	bool	graphChanged = `false`,
		float	zoomFactor = `1.0`
	)

slot

Convenience function that call center function on the current scene, apply a zoom (if needed) and draw the view. Same thing than.

getScene()->centerScene();
getScene()->zoomFactor();
draw();

Examples:: graph_display/graph_display.cpp.

void tlp::GlMainWidget::closing	(	GlMainWidget *	,
		QCloseEvent *
	)

signal

This signal is emit when the GlMainWidget will be deleted

void tlp::GlMainWidget::computeInteractors ( )

Compute interactors before drawing

void tlp::GlMainWidget::createPicture	(	const std::string &	pictureName,
		int	width,
		int	height,
		bool	center = `true`
	)

Take a snapshot of the Widget and put it in a picture.

Parameters

width	size
height	size
center	if true this function call a centerScene() before picture output

QImage tlp::GlMainWidget::createPicture	(	int	width,
		int	height,
		bool	center = `true`
	)

Take a snapshot of the Widget and return it

Parameters

width	size
height	size
center	if true this function call a centerScene() before picture output

QGLFramebufferObject* tlp::GlMainWidget::createTexture	(	const std::string &	textureName,
		int	width,
		int	height
	)

Take a snapshot of the Widget and put it in an OpenGl texture.

Parameters

width	power of two number (for example 256)
height	power of two number (for example 256) You can use this texture with Tulip texture system

See also: GlTextureManager

void tlp::GlMainWidget::doSelect	(	const int	x,
		const int	y,
		const int	width,
		const int	height,
		std::vector< tlp::node > &	sNode,
		std::vector< tlp::edge > &	sEdge,
		tlp::GlLayer *	layer = `NULL`
	)

Deprecated:: this function should not be used anymore, use pickNodesEdges()

bool tlp::GlMainWidget::doSelect	(	const int	x,
		const int	y,
		tlp::ElementType &	type,
		tlp::node &	n,
		tlp::edge &	e,
		tlp::GlLayer *	layer = `NULL`
	)

Deprecated:: this function should not be used anymore, use pickNodesEdges()

void tlp::GlMainWidget::draw ( bool graphChanged = true )

slot

Draw the GlScene and the interactors

Examples:: graph_display/graph_display.cpp.

void tlp::GlMainWidget::drawInteractors ( )

Draw interactors

static QGLWidget* tlp::GlMainWidget::getFirstQGLWidget ( )

static

This function return the first QGLWidget created This function is use to share OpenGL context

tlp::GlScene* tlp::GlMainWidget::getScene ( )

inline

Get the GlScene of this GlMainWidget You have to add yours GlLayer and GlEntity to this GlScene At the construction this GlScene is empty.

See also: GlScene; GlScene::createLayer(const std::string &name); GlLayer::addGlEntity(GlSimpleEntity *entity,const std::string& name)

Examples:: graph_display/graph_display.cpp.

Definition at line 99 of file GlMainWidget.h.

static void tlp::GlMainWidget::getTextureRealSize	(	int	width,
		int	height,
		int &	textureRealWidth,
		int &	textureRealHeight
	)

static

Compute texture size in power of two with given height and width For example if you set width to 94 and height to 256, this function set textureRealWidth to 128 and textureRealHeight to 256.

virtual QImage tlp::GlMainWidget::grabFrameBuffer ( bool withAlpha = false )

virtual

Grab the FrameBuffer of this GlMainWidget

Parameters

withAlpha use alpha chanel

bool tlp::GlMainWidget::keepScenePointOfViewOnSubgraphChanging ( ) const

Returns if the scene point of view must be kept when changing between graphs belonging to the same hierarchy.

virtual void tlp::GlMainWidget::makeCurrent ( )

virtual

Extend makeCurrent function of QGLWidget to inform TextureManager and DisplayListManager of context changement

bool tlp::GlMainWidget::outputEPS	(	int	size,
		int	doSort,
		const char *	filename
	)

EPS output of the GlMainWidget.

bool tlp::GlMainWidget::outputSVG	(	int	size,
		const char *	filename
	)

SVG output of the GlMainWidget.

bool tlp::GlMainWidget::pickGlEntities	(	const int	x,
		const int	y,
		const int	width,
		const int	height,
		std::vector< SelectedEntity > &	pickedEntities,
		tlp::GlLayer *	layer = `NULL`
	)

Function to do picking on entities in a screen region It just calls selectEntities on the GlScene instance.

Parameters

x	screen coordinates
y	screen coordinates
width	screen size
height	screen size
pickedEntities	filled with entity under the selection screen rectangle
layer	if you want to do the selection only on one GlLayer

bool tlp::GlMainWidget::pickGlEntities	(	const int	x,
		const int	y,
		std::vector< SelectedEntity > &	pickedEntities,
		tlp::GlLayer *	layer = `NULL`
	)

Function to do picking on entities. It just calls selectEntities on the GlScene instance with a small window of twelve pixels.

Parameters

x	screen coordinates
y	screen coordinates
pickedEntities	filled with entity under the selection screen rectangle
layer	if you want to do the selection only on one GlLayer

void tlp::GlMainWidget::pickNodesEdges	(	const int	x,
		const int	y,
		const int	width,
		const int	height,
		std::vector< SelectedEntity > &	selectedNodes,
		std::vector< SelectedEntity > &	selectedEdges,
		tlp::GlLayer *	layer = `NULL`,
		bool	pickNodes = `true`,
		bool	pickEdges = `true`
	)

Select nodes and edges in a region of the screen.

Select all nodes and edges lying in the area of the screen of given width and height, and with its upper-left corner at (x,y)

Parameters

selectedNodes	filled by the method with the nodes found in the region
selectedEdges	filled by the method with the edges found in the region
layer	specify the layer in which to perform the picking
pickNodes	enable or disable the picking of nodes
pickEdges	enable or disable the picking of edges

Examples:: interactor_plugin/interactor_plugin.cpp.

bool tlp::GlMainWidget::pickNodesEdges	(	const int	x,
		const int	y,
		SelectedEntity &	selectedEntity,
		tlp::GlLayer *	layer = `NULL`,
		bool	pickNodes = `true`,
		bool	pickEdges = `true`
	)

Select a node or edge at a screen point Try to select at point (x,y) a node in the first place then if no result try to select an edge.

Parameters

type	tells what has been found: NODE, EDGE
layer	specify the layer in which to perform the picking
pickNodes	enable or disable the picking of nodes
pickEdges	enable or disable the picking of edges

Returns: true if something has been found, false otherwise

void tlp::GlMainWidget::redraw ( )

slot

This function is given for optimisation purpose only. If the hardware enable it, it enables to redraw only the Augmented display and the interactors and not the graph it is really usefull for interactors such as zoom box etc.. Warning, if you change the graph or the porperties of element (Colors, size, etc...) applying that fonction will not display the change, in that case, use the draw function.

void tlp::GlMainWidget::render	(	RenderingOptions	options = `RenderingOptions(RenderScene\|SwapBuffers)`,
		bool	checkVisibility = `true`
	)

This function performs all the rendering process of the graph. Use this function only for advanced purpose, if you want to perform simple rendering use the draw or redraw functions instead.

Parameters

options Configure the rendering process, see the RenderingOption documentation for more information on each rendering option effect.

See also: RenderingOption

Parameters

checkVisibility If check visibility is set as true : the engine check if GlMainWidget QWidget is visible. If set at false : the engine render the scene in all cases

void tlp::GlMainWidget::resizeGL	(	int	w,
		int	h
	)

Resize openGL view

int tlp::GlMainWidget::screenToViewport ( int l )

inline

convert a screen measure into a viewport measure

Parameters

a	measure in screen coordinates specified as an integer

Returns: the converted measure in viewport coordinates as an integer

Definition at line 153 of file GlMainWidget.h.

double tlp::GlMainWidget::screenToViewport ( double l )

inline

convert a screen measure into a viewport measure

Parameters

a	measure in screen coordinates specified as a double

Returns: the converted measure in viewport coordinates as a double

Definition at line 166 of file GlMainWidget.h.

Coord tlp::GlMainWidget::screenToViewport ( Coord point )

inline

convert a screen point into a viewport point

Parameters

a	point in screen coordinates

Returns: the converted point in viewport coordinates

Definition at line 179 of file GlMainWidget.h.

bool tlp::GlMainWidget::selectGlEntities	(	const int	x,
		const int	y,
		const int	width,
		const int	height,
		std::vector< GlSimpleEntity * > &	pickedEntities,
		tlp::GlLayer *	layer = `NULL`
	)

inline

Deprecated:: this function should not be used anymore, please use pickGlEntities() instead.

Definition at line 285 of file GlMainWidget.h.

bool tlp::GlMainWidget::selectGlEntities	(	const int	x,
		const int	y,
		std::vector< GlSimpleEntity * > &	pickedEntities,
		tlp::GlLayer *	layer = `NULL`
	)

inline

Deprecated:: this function should not be used anymore, please use pickGlEntities() instead.

Definition at line 306 of file GlMainWidget.h.

void tlp::GlMainWidget::setAdvancedAntiAliasing ( bool advancedAntiAliasing )

inline

Specify if an advanced technique for better scene anti-aliasing has to be activated.

That option allows to obtain a better scene antialiasing through the use of offscreen rendering and sampling. The result rendering will look better while the performance will be slightly altered. That option is desactivated by default. Use it with caution as it could cause crashes with some buggy OpenGL drivers.

Definition at line 377 of file GlMainWidget.h.

void tlp::GlMainWidget::setKeepScenePointOfViewOnSubgraphChanging ( bool )

Specify if the scene point of view must be kept when changing between graphs belonging to the same hierarchy.

void tlp::GlMainWidget::viewDrawn	(	GlMainWidget *	glWidget,
		bool	graphChanged
	)

signal

This signal is emit when GlMainWidget::draw() is call

double tlp::GlMainWidget::viewportToScreen ( double l )

inline

convert a viewport measure into a screen measure

Parameters

a	measure in viewport coordinates specified as a double

Returns: the converted measure in screen coordinates as a double

Definition at line 193 of file GlMainWidget.h.

Coord tlp::GlMainWidget::viewportToScreen ( Coord point )

inline

convert a viewport point into a screen point

Parameters

a	point in viewport coordinates

Returns: the converted point in screen coordinates

Definition at line 206 of file GlMainWidget.h.

void tlp::GlMainWidget::viewRedrawn ( GlMainWidget * glWidget )

signal

This signal is emit when GlMainWidget::redraw() is call

Public Types

Public Slots

Signals

Public Member Functions

Static Public Member Functions

Protected Slots

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation