IlvGraphicPath Class Reference

Graphic class. More...

#include <ilviews/graphics/path.h>

Inheritance diagram for IlvGraphicPath:

Public Member Functions
	IlvGraphicPath (IlvDisplay *display, IlUInt count, IlvPoint *points, IlBoolean copyPoints=IlTrue, IlvPalette *palette=0)
	Constructor. More...
	IlvGraphicPath (IlvDisplay *display, IlUInt count, IlvPointArray *paths, IlBoolean copyPoints=IlTrue, IlvPalette *palette=0)
	Constructor. More...
virtual	~IlvGraphicPath ()
	Destructor. More...
virtual void	applyTransform (const IlvTransformer *t)
	Applies a transformation function to the graphic object. More...
const IlvRect &	bbox () const
	Retrieves the bounding box. More...
virtual void	boundingBox (IlvRect &rect, const IlvTransformer *t=0) const
	Retrieves the bounding box. More...
virtual IlBoolean	contains (const IlvPoint &p, const IlvPoint &tp, const IlvTransformer *t=0) const
	Checks if a point is contained. More...
virtual void	draw (IlvPort *dst, const IlvTransformer *t=0, const IlvRegion *clip=0) const
	Draws the path and its drawing data. More...
IlvPalette *	getBackgroundPalette () const
	Retrieves the background palette. More...
IlUInt	getBBoxExtent () const
	Gets the bounding box extent. More...
IlvDrawRule	getDrawRule () const
	Retrieves the draw rule. More...
IlDouble	getLength () const
	Computes the length of this graphic path. More...
IlDouble	getLength (const IlvPointArray &path) const
	Computes the length of a path. More...
virtual IlDouble	getLocation (IlUInt count, const IlvPointArray *paths, IlDouble distance=0., IlvPoint *pos=0, IlDouble *angle=0, IlUInt *path=0, IlUInt *segment=0) const
	Computes a location along a path. More...
IlDouble	getLocation (IlDouble distance, IlvPoint *pos=0, IlDouble *angle=0, IlUInt *path=0, IlUInt *segment=0, IlvTransformer *t=0) const
	Computes a location along this path. More...
IlUInt	getNumPaths () const
	Retrieves the number of paths. More...
IlvPathDrawingData *	getPathDrawingData () const
	Gets the drawing data. More...
const IlvPointArray *	getPaths () const
	Retrieves the paths. More...
virtual void	setAlpha (IlvIntensity)
	Sets the alpha value of the object. More...
virtual void	setAntialiasingMode (IlvAntialiasingMode)
	Sets the anti-aliasing mode of the object. More...
virtual void	setBackground (IlvColor *bg)
	Sets the background color. More...
void	setBBoxExtent (IlUInt extent)
	Sets the bounding box extent. More...
void	setDrawRule (IlvDrawRule val)
	Sets the draw rule. More...
virtual void	setForeground (IlvColor *fg)
	Sets the foreground color. More...
virtual void	setMode (IlvDrawMode mode)
	Sets the drawing mode. More...
virtual void	setPalette (IlvPalette *pal)
	Sets the palette. More...
void	setPathDrawingData (IlvPathDrawingData *data)
	Sets the drawing data. More...
Public Member Functions inherited from IlvSimpleGraphic
	IlvSimpleGraphic (IlvDisplay *display, IlvPalette *palette=0)
	Initializes a new IlvSimpleGraphic. More...
virtual	~IlvSimpleGraphic ()
	Destructor. More...
virtual void	applyResources (const char *, const char *, const char *, const char *, IlvDisplay *=0)
	Applies resources on a graphic object. More...
IlvIntensity	getAlpha () const
	Retrieves the alpha value. More...
IlvAntialiasingMode	getAntialiasingMode () const
	Retrieves the anti-aliasing mode. More...
IlvArcMode	getArcMode () const
	Retrieves the arc mode. More...
IlvColor *	getBackground () const
	Retrieves the background color. More...
IlvColorPattern *	getColorPattern () const
	Retrieves the color pattern. More...
virtual IlvDisplay *	getDisplay () const
	Retrieves the IlvDisplay instance. More...
IlvFillRule	getFillRule () const
	Retrieves the fill rule. More...
IlvFillStyle	getFillStyle () const
	Retrieves the fill style. More...
IlvFont *	getFont () const
	Retrieves the font. More...
IlvColor *	getForeground () const
	Retrieves the foreground color. More...
IlvGradientPattern *	getGradientPattern () const
	Retrieves the gradient pattern. More...
IlvLineStyle *	getLineStyle () const
	Retrieves the line style. More...
IlUShort	getLineWidth () const
	Retrieves the line width. More...
virtual IlvLookFeelHandler *	getLookFeelHandler () const
	Returns the look & feel handler used by this object. More...
virtual int	getLookupStringInputMethod (IlvEvent &event, char *bufferReturn, int bytesBuffer, int *statusReturn)
	Gets the preedit string from an input method. More...
IlvDrawMode	getMode () const
	Retrieves the draw mode. More...
IlBoolean	getOverwrite () const
	Retrieves the overwrite mode. More...
IlvPalette *	getPalette () const
	Retrieves the internal palette value. More...
IlvPattern *	getPattern () const
	Retrieves the pattern. More...
virtual void	invert (IlBoolean=IlFalse)
	Highlights the object. More...
virtual void	registerInputMethod () const
	Controls the connection of a graphic object to an input method. More...
virtual void	setArcMode (IlvArcMode)
	Sets the arc mode of the object. More...
virtual void	setColorPattern (IlvColorPattern *)
	Sets the color pattern of the object. More...
virtual void	setFillRule (IlvFillRule)
	Sets the fill rule of the object. More...
virtual void	setFillStyle (IlvFillStyle)
	Sets the fill style of the object. More...
virtual void	setFocusValuesInputMethod (IlUShort count, const IlvImValue *values) const
	Controls the interaction between a simple graphic object and an input method. More...
virtual void	setFont (IlvFont *)
	Sets the font of the object. More...
virtual void	setGradientPattern (IlvGradientPattern *)
	Sets the gradient pattern of the object. More...
virtual void	setHolder (IlvGraphicHolder *)
	Sets the object's holder. More...
virtual void	setLineStyle (IlvLineStyle *)
	Sets the line style of the object. More...
virtual void	setLineWidth (IlUShort)
	Sets the line width of the object. More...
virtual void	setOverwrite (IlBoolean)
	Sets an overwrite mode that modifies how the drawing member functions operate. More...
virtual void	setPattern (IlvPattern *)
	Sets the pattern of the object. More...
virtual void	setValuesInputMethod (IlUShort count, const IlvImValue *values) const
	Controls the interaction between a graphic object and an input method. More...
virtual void	unRegisterInputMethod () const
	Controls the disconnection of a graphic object from an input method. More...
virtual void	unsetFocusInputMethod () const
	Controls the interaction between a graphic object and an input method. More...
Public Member Functions inherited from IlvGraphic
void	addCallback (const IlSymbol *callbackType, IlvGraphicCallback callback)
	Adds a callback function to a callback list. More...
void	addCallback (const IlSymbol *callbackType, const IlSymbol *callbackName, const IlSymbol *script=0)
	Adds a callback function to a callback list. More...
void	addCallback (const IlSymbol *callbackType, IlvGraphicCallback callbackName, IlAny data)
	Adds a callback function to a callback list. More...
void	addClassProperty (const IlSymbol *key, IlAny value)
	Adds a property to this object's class. More...
void	addProperty (const IlSymbol *key, IlAny value)
	Adds a specific property to the object. More...
void	addTag (const IlSymbol *tag)
	Adds a tag. More...
virtual void	apply (IlvApplyObject function, IlAny arg)
	Applies a function to objects that compose another object. More...
IlBoolean	applyAttribute (const char *attributeClassName, IlInt value, IlAny checkData=0) const
	Applies attributes. More...
IlBoolean	applyAttribute (const char *attributeClassName, IlFloat value, IlAny checkData=0) const
	Applies attributes. More...
IlBoolean	applyAttribute (const char *attributeClassName, const char *value, IlAny checkData=0) const
	Applies attributes. More...
virtual void	applyReferences (IlvApplyObject function, IlAny arg)
	Applies a function to objects that are referenced by another object. More...
virtual void	callCallbacks (const IlSymbol *callbackType)
	Calls every callback of a given type. More...
const char *	className () const
	Returns the class name of an object. More...
virtual void	computeFocusRegion (IlvRegion &r, const IlvTransformer *t=0) const
	Computes the region needed for the drawing of the focus. More...
IlBoolean	contains (const IlvPoint &p) const
	Checks whether a point is in the object. More...
virtual IlvGraphic *	copy () const =0
	Copies this object. More...
void	draw (IlvPort *dst, const IlvTransformer *t, const IlvRect *clip) const
	Draws a graphic object. More...
virtual void	drawFocus (IlvPort *dst, const IlvPalette *palette, const IlvTransformer *t=0, const IlvRegion *clip=0) const
	Draws additional drawings for an object that has the keyboard focus. More...
virtual void	getAccessors (const IlSymbol *const **, const IlvValueTypeClass *const **, IlUInt &) const
	Retrieves the list of available accessors of an object. More...
IlvGraphicCallback	getCallback (const IlSymbol *callbackType) const
	Gets a callback. More...
IlvGraphicCallback	getCallback () const
	Gets the main callback function. More...
IlAny	getCallbackData (const IlSymbol *callbackType, IlvGraphicCallback callback) const
	Gets a callback user data. More...
IlAny	getCallbackData (const IlSymbol *callbackType, const IlSymbol *callbackName) const
	Gets a callback user data. More...
IlSymbol *	getCallbackName (const IlSymbol *callbackType) const
	Gets the name of a callback. More...
IlSymbol *	getCallbackName () const
	Gets the symbol that identifies the main callback. More...
virtual IlUInt	getCallbackTypes (const char *const **names, const IlSymbol *const **types) const
	Gets the number of register callback types for the object. More...
virtual IlvGraphic *	getChildAt (IlUInt index) const
	Returns the sub-object of the graphic object specified by index. More...
virtual IlvGraphic *	getChildByName (const char *name) const
	Returns the sub-object of the graphic object specified by a name. More...
virtual IlUInt	getChildCount () const
	Returns the number of children of this graphic object. More...
virtual IlInt	getChildIndex (const IlvGraphic *object) const
	Returns the index of the specified sub-object in this graphic object. More...
virtual IlvGraphic *const *	getChildren (IlUInt &count) const
	Returns an array containing the sub-objects of this graphic object. More...
virtual IlvClassInfo *	getClassInfo () const
	Gets class information. More...
IlAny	getClassProperty (const IlSymbol *key, IlBoolean checkParent=IlFalse) const
	Retrieves the indicated property value in the class of this object. More...
IlAny	getClientData () const
	Gets client data. More...
virtual const char *	getDefaultInteractor () const
	Gets the name of the default interactor for this object. More...
virtual IlvGraphicHolder *	getHolder () const
	Gets a pointer to an object's holder. More...
IlvInteractor *	getInteractor () const
	Returns the interactor associated with the current object. More...
const char *	getName () const
	Gets the name of the object. More...
IlvNamedProperty *	getNamedProperty (const IlSymbol *name) const
	Gets a named property. More...
IlSymbol *	getNextFocusGraphic () const
	Gets the next object in the focus chain. More...
IlSymbol *	getPreviousFocusGraphic () const
	Gets the previous object in the focus chain. More...
IlAny	getProperty (const IlSymbol *key) const
	Gets a property. More...
IlvSmartSet *	getSmartSet () const
	Gets the smart set object containing this graphic object. More...
const IlSymbol *const *	getTags (IlUInt &count) const
	Returns all the tags applied to this object. More...
IlvDim	h () const
	Gets the height value of the object. More...
void	h (IlvDim h)
	Sets the height value of the object. More...
IlBoolean	hasCallback (const IlSymbol *callbackType, IlvGraphicCallback callback) const
	Checks whether a callback function is in a callback list. More...
IlBoolean	hasCallback (const IlSymbol *callbackType, const IlSymbol *callbackName) const
	Checks whether a callback function is in a callback list. More...
IlBoolean	hasCallbackData (const IlSymbol *callbackType, IlvGraphicCallback callback) const
	Checks whether a callback function has user data. More...
IlBoolean	hasCallbackData (const IlSymbol *callbackType, const IlSymbol *callbackName) const
	Checks whether a callback function has user data. More...
const IlvClassInfo *	hasClassProperty (const IlSymbol *key, IlBoolean s=IlFalse) const
	Checks for a class where the keyed property exists. More...
IlBoolean	hasProperty (const IlSymbol *key) const
	Checks whether the object has a particular property. More...
IlBoolean	hasTag (const IlSymbol *tag) const
	Checks whether the object has a specific tag. More...
virtual IlBoolean	inside (const IlvRegion &r, const IlvTransformer *t=0) const
	Determines whether an object with transformation applied is inside the bounding box. More...
IlBoolean	inside (const IlvRect &r, const IlvRect &tr, const IlvTransformer *t=0) const
	Determines whether an object with transformation applied is inside the bounding box. More...
IlBoolean	inside (const IlvRect &r) const
	Determines whether a rectangle is inside the bounding box. More...
virtual IlBoolean	intersects (const IlvRegion &r, const IlvTransformer *t=0) const
	Checks whether a region intersects the bounding box with transformation applied. More...
IlBoolean	intersects (const IlvRect &r, const IlvRect &tr, const IlvTransformer *t=0) const
	Checks whether a rectangle intersects the bounding box with transformation applied. More...
IlBoolean	intersects (const IlvRect &r) const
	Checks whether a rectangle intersects the bounding box. More...
IlBoolean	isFirstFocusGraphic () const
	Checks whether the object is first in the focus chain. More...
IlBoolean	isFocusable () const
	Checks whether the object can receive the keyboard focus. More...
IlBoolean	isInSmartSet () const
	Checks whether a graphic object belongs to a smart set. More...
IlBoolean	isLastFocusGraphic () const
	Checks whether the object is last in the focus chain. More...
IlBoolean	isSensitive () const
	Checks whether the object is sensitive. More...
IlBoolean	isSubtypeOf (const char *parentClass) const
	Checks whether this object's class is a subclass of a given parent class. More...
IlBoolean	isSubtypeOf (const IlvClassInfo *classInfo) const
	Checks whether this object's class is a subclass. More...
virtual void	move (IlvPos x, IlvPos y)
	Moves the graphic object. More...
void	move (const IlvPoint &p)
	Moves the graphic object. More...
void	moveResize (const IlvRect &size)
	Moves and resizes a graphic object. More...
virtual IlBoolean	needsInputContext () const
	Indicates whether the graphic instance can connect to an input method for locale dependent input. More...
virtual void	print (std::ostream &out, int level=0) const
	Prints for debugging purposes. More...
void	removeCallback (const IlSymbol *callbackType, IlvGraphicCallback callback)
	Removes a callback function from a callback list. More...
void	removeCallback (const IlSymbol *callbackType, const IlSymbol *callbackName)
	Removes a callback function from a callback list. More...
IlBoolean	removeClassProperty (const IlSymbol *key)
	Removes a property from this object's class. More...
void	removeInteractor ()
	Removes the interactor from the current object. More...
IlvNamedProperty *	removeNamedProperty (IlSymbol *name)
	Removes a named property from the object. More...
IlBoolean	removeProperty (const IlSymbol *key)
	Removes a property from the object. More...
void	removeTag (const IlSymbol *tag)
	Removes a tag. More...
IlBoolean	replaceClassProperty (const IlSymbol *key, IlAny value)
	Replaces a property in this object's class. More...
IlBoolean	replaceProperty (const IlSymbol *key, IlAny value)
	Replaces a property. More...
virtual void	resize (IlvDim newW, IlvDim newH)
	Resizes a graphic object. More...
virtual void	rotate (const IlvPoint &center, IlFloat angle)
	Rotates a graphic object. More...
virtual void	scale (IlFloat zoomX, IlFloat zoomY)
	Scales the graphic object. More...
void	setCallback (const IlSymbol *callbackType, IlvGraphicCallback callback)
	Sets a new callback. More...
void	setCallback (const IlSymbol *callbackType, const IlSymbol *callbackName, const IlSymbol *script=0)
	Removes all previously set callbacks. More...
void	setCallback (const IlSymbol *callbackType, IlvGraphicCallback callbackName, IlAny data)
	Removes all previously set callbacks. More...
void	setCallback (IlvGraphicCallback callback, IlAny data)
	Sets the main callback function. More...
void	setCallbackData (const IlSymbol *callbackType, IlvGraphicCallback callback, IlAny data)
	Sets the callback user data for a callback function. More...
void	setCallbackData (const IlSymbol *callbackType, const IlSymbol *callbackName, IlAny data)
	Sets the callback user data for a callback function. More...
void	setCallbackName (const IlSymbol *callbackName)
	Sets the symbol that identifies the main callback. More...
void	setClientData (IlAny clientData)
	Sets client data. More...
void	setFirstFocusGraphic ()
	Sets the object to be first in the focus chain.
void	setFocusable (IlBoolean value)
	Set the focusable state of the object. More...
IlBoolean	setInteractor (IlvInteractor *inter)
	Attaches an interactor to the current object. More...
IlBoolean	setInteractor (const char *name)
	Attaches an interactor to this graphic object. More...
void	setLastFocusGraphic ()
	Sets the object to be last in the focus chain.
virtual void	setName (const char *name)
	Sets the name of the object. More...
IlvNamedProperty *	setNamedProperty (IlvNamedProperty *property)
	Sets a named property on the object. More...
virtual void	setNeedsInputContext (IlBoolean val)
	Specifies whether the graphic object should have locale dependent input. More...
void	setNextFocusGraphic (IlSymbol *name)
	Sets the object to be next in the focus chain. More...
void	setPreviousFocusGraphic (IlSymbol *name)
	Sets an object as previous in the focus chain. More...
void	setProperty (const IlSymbol *key, IlAny value)
	Sets a property of the object to a value. More...
virtual void	setSensitive (IlBoolean value)
	Sets the sensitivity of the object. More...
virtual void	symmetry (IlvDirection axis)
	Flips a graphic object. More...
virtual void	translate (IlvPos dx, IlvPos dy)
	Applies a transformation function on a graphic object. More...
IlvDim	w () const
	Gets the width value of the object. More...
void	w (IlvDim w)
	Sets the width value of the object. More...
virtual void	write (IlvOutputFile &output) const =0
	Writes an object description to a file. More...
IlvPos	x () const
	Gets the x coordinate value of the object. More...
void	x (IlvPos x)
	Sets the x coordinate value of the object. More...
IlvPos	y () const
	Gets the y coordinate value of the object. More...
void	y (IlvPos y)
	Sets the y coordinate value of the object. More...
virtual IlBoolean	zoomable () const
	Checks whether this object is zoomable. More...
Public Member Functions inherited from IlvValueInterface
virtual IlBoolean	applyValue (const IlvValue &value)
	Apply an accessor. More...
virtual IlBoolean	changeValue (const IlvValue &val)
	Changes the value of an accessor. More...
virtual IlBoolean	changeValues (const IlvValue *values, IlUShort count=0)
	Changes several accessor values simultaneously. More...
virtual IlvValue &	queryValue (IlvValue &val) const
	Retrieves an accessor value. More...
virtual void	queryValues (IlvValue *values, IlUShort count) const
	Retrieves multiple accessor values simultaneously. More...

Additional Inherited Members
Static Public Member Functions inherited from IlvGraphic
static void	AddProperty (const IlSymbol *key, IlAny value)
	Adds a property to this object's class. More...
static void	AddToCallbackTypeList (IlUInt &count, const char *const **names, const IlSymbol *const **types, const char *newName, const IlSymbol *newType)
	Adds a callback to a list. More...
static void	AllowZoom (IlBoolean az)
	Sets or inhibits zooming. More...
static IlvClassInfo *	ClassInfo () const
	Gets class information. More...
static IlAny	GetProperty (const IlSymbol *key, IlBoolean checkSuperClass=IlFalse)
	Retrieves the property value associated with the key in this object's class. More...
static const IlvClassInfo *	HasProperty (const IlSymbol *key, IlBoolean checkSuperClass=IlFalse)
	Checks for the existence of a property for this object's class hierarchy. More...
static IlBoolean	IsZoomAllowed ()
	Checks whether zoomable objects can display themselves when zooming out. More...
static IlvGraphic *	read (IlvInputFile &file, IlvPalette *palette)
	Reads an object description from a file. More...
static IlBoolean	RemoveProperty (const IlSymbol *key)
	Removes a property from this object's class. More...
static IlBoolean	ReplaceProperty (const IlSymbol *key, IlAny value)
	Replaces a property in this object's class. More...

Detailed Description

Graphic class.

Library: views

An IlvGraphicPath is a collection of polypoints.

Depending on the value of the DrawRule attribute of the object, the polypoints are drawn as polylines (IlvStrokeOnly), filled polygons (IlvFillOnly), or both; that is, filled polygons with an outline (IlvStrokeAndFill).

The palette defined by the IlvSimpleGraphic superclass is used to draw the outline of the polygon. IlvGraphicPath defines a second palette (backgroundPalette) to fill the polygons.

The main differences between an IlvGraphicPath and a set of IlvPolygons are the following:

• The same resources are used to draw the polypoints.
• Each polypoint has an influence on the rendering of the other polypoints (not applicable in IlvStrokeOnly mode); depending on the position of its points, a polypoint may either appear as an ordinary polygon or as a hole in another polygon.

IlvGraphicPath also allows user-specific actions when the polypoints are drawn. This is done by attaching a data structure to the IlvGraphicPath. At each redraw, the graphic path "travels" along the collection of paths, triggering a data structure method at each step. This mechanism is described in the sections on the member function setPathDrawingData and the class IlvPathSteppingData and its subclass IlvPathDrawingData.

Both of the IlvGraphicPath constructors automatically compute the background palette from the resource of the regular palette. Foreground color and background color are swapped; other resources are identical.

See also

IlvPathDrawingData, IlvPathSteppingData, IlvPointArray,

Constructor & Destructor Documentation

IlvGraphicPath() [1/2]

IlvGraphicPath::IlvGraphicPath	(	IlvDisplay *	display,
		IlUInt	count,
		IlvPoint *	points,
		IlBoolean	copyPoints = IlTrue,
		IlvPalette *	palette = 0
	)

Constructor.

This constructor initializes an IlvGraphicPath containing only one polypoint.

Parameters

display	The display instance.
count	The number of points that define this graphic path.
points	The array of at least count points that defines the shape of this object.
copyPoints	Indicates, if set to IlTrue, that the array is copied. If this parameter is set to IlFalse, then the point array points is internally stored in the object.
palette	The palette instance.

IlvGraphicPath() [2/2]

IlvGraphicPath::IlvGraphicPath	(	IlvDisplay *	display,
		IlUInt	count,
		IlvPointArray *	paths,
		IlBoolean	copyPoints = IlTrue,
		IlvPalette *	palette = 0
	)

Constructor.

This constructor initializes an IlvGraphicPath containing several polypoints.

Parameters

display	The display instance.
count	The number of paths that define this graphic path.
paths	The array of at least count point arrays that define the shape of this object. This array is destroyed in this object's destructor.
copyPoints	If set to IlTrue, both paths and the point that they contain are copied. Otherwise, paths is stored by this object, and deleted in its constructor.
palette	The palette instance.

~IlvGraphicPath()

virtual IlvGraphicPath::~IlvGraphicPath ( )

virtual

Destructor.

The destructor unlocks the background palette and deletes the array of IlvPointArray. If setPathDrawingData has been called, the corresponding IlvPathDrawingData is deleted as well.

Member Function Documentation

applyTransform()

virtual void IlvGraphicPath::applyTransform ( const IlvTransformer *  t )

virtual

Applies a transformation function to the graphic object.

Applies the transformer t to the shape of the object. Unless the transformation is a scaling operation, the result of applying it to certain objects can be insignificant. For example, applying a non-scaling transformer to an IlvRectangle object is meaningless, since the rectangle remains a rectangle. On the other hand, meaningful transformations can be applied to objects that are instances of types such as IlvLine or IlvPolyPoints.

Note

applyTransform() is one of the most important method to be rewritten for classes derived from IlvGraphic, since it is called by the resize(), move(), moveResize(), scale(), etc., methods.

Parameters

t	The transformer value. If 0, no transformation is performed.

Implements IlvGraphic.

bbox()

const IlvRect& IlvGraphicPath::bbox

(

)

const

Retrieves the bounding box.

Returns

The smallest box containing all the points of the object.

boundingBox()

virtual void IlvGraphicPath::boundingBox ( IlvRect &  rect, const IlvTransformer *  t = 0  ) const

virtual

Retrieves the bounding box.

This member function has the same specification as for IlvGraphic::boundingBox, only the box is extended in the four directions by the value returned by getBBoxExtent.

Parameters

rect	The rectangle that will be set to the bounding box of this object, when transformed with t.
t	The transformer that must be used when computing the bounding box.

Implements IlvGraphic.

contains()

virtual IlBoolean IlvGraphicPath::contains ( const IlvPoint &  p, const IlvPoint &  tp, const IlvTransformer *  t = 0  ) const

virtual

Checks if a point is contained.

This member function has the same specifications as for IlvGraphic::contains. The returned value depends on the DrawRule. The drawing data is not taken into account by this member function.

Parameters

p	The point to be tested, in the object coordinate system.
tp	The point to be tested, in the transformed coordinate system.
t	The transformer that transforms p to tp.

Returns

A Boolean value that indicates whether or not the provided points are located inside this graphic path.

Reimplemented from IlvGraphic.

draw()

virtual void IlvGraphicPath::draw ( IlvPort *  dst, const IlvTransformer *  t = 0, const IlvRegion *  clip = 0  ) const

virtual

Draws the path and its drawing data.

This member function has specifications as for IlvGraphic::draw, but after drawing the graphic path according to the DrawRule, it sets the drawing data by calling IlvPathDrawingData::initDraw and calls the IlvPathSteppingData::stepping member function which starts the iteration along the collection of polypoints.
If the transformer t is not 0, a new array of IlvPointArray containing transformed points is passed to the drawing data, instead of the original array of IlvPointArray.

Parameters

dst	The destination drawing port.
t	The transformer used in this drawing.
clip	The clipping region that must be used.

Implements IlvGraphic.

getBackgroundPalette()

IlvPalette* IlvGraphicPath::getBackgroundPalette

(

)

const

Retrieves the background palette.

Returns

The background palette of the object. This palette is used to fill the polygons defined by the collection of IlvPointArray (not applicable if the draw rule is set to IlvStrokeOnly).

getBBoxExtent()

IlUInt IlvGraphicPath::getBBoxExtent

(

)

const

Gets the bounding box extent.

Returns

The value of the bounding box extent.

See also

setBBoxExtent.

getDrawRule()

IlvDrawRule IlvGraphicPath::getDrawRule

(

)

const

Retrieves the draw rule.

Returns

The draw rule of the object.

getLength() [1/2]

IlDouble IlvGraphicPath::getLength

(

)

const

Computes the length of this graphic path.

This method uses the virtual method getLocation.

Returns

The length of the graphic path.

getLength() [2/2]

IlDouble IlvGraphicPath::getLength

(

const IlvPointArray &

path

)

const

Computes the length of a path.

This method uses the virtual method getLocation.

Parameters

path	The array of points whose length is queried.

Returns

The length of path.

getLocation() [1/2]

virtual IlDouble IlvGraphicPath::getLocation ( IlUInt  count, const IlvPointArray *  paths, IlDouble  distance = 0., IlvPoint *  pos = 0, IlDouble *  angle = 0, IlUInt *  path = 0, IlUInt *  segment = 0  ) const

virtual

Computes a location along a path.

This member function does not use the internal array of polypoints of the object but the one specified by the parameters count and paths.

Parameters

count	The number of paths stored in the array paths.
paths	The array of at least count paths that are travelled along.
distance	If set to 0 (the default value) or to a positive value greater than the path's total length, the remaining parameters pos, angle, path and segment are ignored; the method just computes the length of each polypoint in the array and returns the sum of these lengths. If set to a negative value, the result is undetermined. If set to a positive value smaller than the total length of the path, it is interpreted as the distance to travel along the path. The remaining parameters can provide information about the point situated at this distance from the beginning of the path.
pos	Ignored if distance is set to 0. Otherwise, if it is not 0, this parameter must point to a variable that is set to the coordinates of the point on the path at the distance distance from its start.
angle	Ignored if distance is set to 0. Otherwise, if it is not 0, this parameter must point to a variable that is set to the angle, in degrees of the tangent to the path at the distance distance from its start.
path	Ignored if distance is set to 0. Otherwise, if it is not 0, this parameter must point to a variable that is set to the index of the point array stored in paths that is reached along the path at the distance distance from its start.
segment	Ignored if distance is set to 0. Otherwise, if it is not 0, this parameter must point to a variable that is set to the index of the point in the array designated by path that is reached along the path at the distance distance from its start, so that pos is located somewhere on the segment [paths[ipath]->points[ipoint], paths[ipath]->points[ipoint+1]].

Returns

The total length of the path if distance is 0 or a value greater than the total length of the path. A negative value is returned in other cases.

getLocation() [2/2]

IlDouble IlvGraphicPath::getLocation	(	IlDouble	distance,
		IlvPoint *	pos = 0,
		IlDouble *	angle = 0,
		IlUInt *	path = 0,
		IlUInt *	segment = 0,
		IlvTransformer *	t = 0
	)		const

Computes a location along this path.

This member function is similar to the virtual method getLocation, but it operates on the array of polypoints stored by this object and allows the application of a transformation. This member function actually calls getLocation.

See the previous getLocation() for a complete description of all the parameters of this member function.

Parameters

distance	The distance, along the path, where the point location is computed.
pos	The point location.
angle	The tangent to the path at the indicated location, in degrees.
path	The index of the polypoints that is traversed at the indicated distance.
segment	The index of the last point, in the polypoint indicated by path, that is traversed at the indicated distance.
t	The transformer that is applied to the internal path before the point location is computed.

getNumPaths()

IlUInt IlvGraphicPath::getNumPaths

(

)

const

Retrieves the number of paths.

Returns

The number of IlvPointArray paths managed by the object.

getPathDrawingData()

IlvPathDrawingData* IlvGraphicPath::getPathDrawingData

(

)

const

Gets the drawing data.

Returns

The drawing data structure that has been set by setPathDrawingData.

getPaths()

const IlvPointArray* IlvGraphicPath::getPaths

(

)

const

Retrieves the paths.

Returns

The array of IlvPointArray managed by the object.

setAlpha()

virtual void IlvGraphicPath::setAlpha ( IlvIntensity  alpha )

virtual

Sets the alpha value of the object.

Parameters

alpha

The new alpha value.

Reimplemented from IlvSimpleGraphic.

setAntialiasingMode()

virtual void IlvGraphicPath::setAntialiasingMode ( IlvAntialiasingMode  mode )

virtual

Sets the anti-aliasing mode of the object.

Parameters

mode	The new anti-aliasing mode.

Reimplemented from IlvSimpleGraphic.

setBackground()

virtual void IlvGraphicPath::setBackground ( IlvColor *  bg )

virtual

Sets the background color.

This member function sets the background color of the normal palette to bg. It also sets the foreground color of the background palette to bg and, if the drawing data is not 0, sets its background color to bg as well.

Parameters

bg	The new background color of this graphic path, and its drawing data if there is one. The color is locked.

Reimplemented from IlvSimpleGraphic.

setBBoxExtent()

void IlvGraphicPath::setBBoxExtent

(

IlUInt

extent

)

Sets the bounding box extent.

This member function allows you to notify the object that its bounding box should always be augmented by the value extent in all directions. This is specially useful when attaching a drawing data structure to the object: if this data structure is set to draw an additional object along the path, this object should be taken into account when computing the bounding box of the IlvGraphicPath.

Parameters

extent

The new bounding box extent.

setDrawRule()

void IlvGraphicPath::setDrawRule

(

IlvDrawRule

val

)

Sets the draw rule.

Parameters

val	The new draw rule of this object. This attribute controls the way polypoints are displayed.

setForeground()

virtual void IlvGraphicPath::setForeground ( IlvColor *  fg )

virtual

Sets the foreground color.

This member function sets the foreground color of the normal palette to fg. It also sets the background color of the background palette to fg and, if the drawing data is not 0, sets its foreground color to fg as well.

Parameters

fg	The new foreground color of this graphic path, and its drawing data if there is one. The color is locked.

Reimplemented from IlvSimpleGraphic.

setMode()

virtual void IlvGraphicPath::setMode ( IlvDrawMode  mode )

virtual

Sets the drawing mode.

Sets the draw mode to mode for the palette of the object, its background palette, and the palette of the drawing data (if not 0).

Parameters

mode	The new drawing mode of this object.

Reimplemented from IlvSimpleGraphic.

setPalette()

virtual void IlvGraphicPath::setPalette ( IlvPalette *  pal )

virtual

Sets the palette.

This member function sets the normal palette to pal. It also sets the background palette to a copy of that palette, except that its foreground and background color are swapped. If the drawing data is not 0, this method sets its palette to pal as well.

Parameters

pal	The new palette of this graphic path, and the one of its drawing data if there is one. The palette is locked.

Reimplemented from IlvSimpleGraphic.

setPathDrawingData()

void IlvGraphicPath::setPathDrawingData

(

IlvPathDrawingData *

data

)

Sets the drawing data.

Attaches a drawing data structure to the object. If another data structure was set, it is the user's responsibility to delete it. The IlvGraphicPath destructor deletes this structure. IlvGraphicPath only uses this structure in the * draw method.

Parameters

data	the new drawing data of this graphic path.