IlvCircularGauge Class Reference

Graphic class. More...

#include <ilviews/graphics/cirgauge.h>

Inheritance diagram for IlvCircularGauge:

Public Member Functions
	IlvCircularGauge (IlvDisplay *display, const IlvRect &drawrect, IlFloat min=0, IlFloat max=100, IlFloat value=50, IlFloat start=0, IlFloat range=180, IlvPalette *palette=0)
	Constructor. More...
virtual void	bboxRange (IlFloat v1, IlFloat v2, IlvRect &rect, const IlvTransformer *t=0) const
	Returns the rectangle to update when the value of the gauge changes. More...
virtual void	boundingBox (IlvRect &, const IlvTransformer *t=0) const
	Retrieves the bounding box of the graphic object. More...
virtual IlUInt	computeNeedlePoints (IlvPoint *points, const IlvTransformer *t=0) const
	Computes the shape of the gauge handle. More...
virtual IlBoolean	contains (const IlvPoint &p, const IlvPoint &tp, const IlvTransformer *t=0) const
	Checks whether a point is in the object. More...
virtual void	drawValue (IlvPort *, const IlvTransformer *t=0, const IlvRegion *clip=0) const
	Performs the drawing representing the current value of the gauge. More...
IlFloat	getRange () const
	Retrieves the angle range of the gauge. More...
IlFloat	getStart () const
	Retrieves the starting angle of the gauge. More...
virtual IlFloat	requestValue (const IlvPoint &, const IlvTransformer *, IlBoolean &) const
	Returns the value of the gauge associated with a given point. More...
void	setRange (IlFloat range)
	Sets the angle range of the gauge. More...
void	setStart (IlFloat start)
	Sets the starting angle of the gauge. More...
Public Member Functions inherited from IlvGauge
	IlvGauge (IlvDisplay *display, const IlvRect &drawrect, IlFloat min=0, IlFloat max=100, IlFloat value=50, IlvPalette *palette=0)
	Constructor. More...
virtual void	applyTransform (const IlvTransformer *t)
	Applies a transformation function to the graphic object. More...
virtual void	draw (IlvPort *, const IlvTransformer *t=0, const IlvRegion *clip=0) const
	Draws the graphic object. More...
virtual void	drawFocus (IlvPort *, const IlvPalette *, const IlvTransformer *t=0, const IlvRegion *clip=0) const
	Draws additional drawings for an object that has the keyboard focus. More...
virtual const char *	getDefaultInteractor () const
	Gets the name of the default interactor for this object. More...
IlFloat	getMax () const
	Returns the maximum value of the gauge. More...
IlFloat	getMin () const
	Returns the minimum value of the gauge. More...
IlFloat	getValue () const
	Returns the current value of the gauge. More...
virtual void	invert (IlBoolean=IlFalse)
	Highlights the object. More...
virtual void	setAlpha (IlvIntensity alpha)
	Sets the alpha value of the object. More...
virtual void	setAntialiasingMode (IlvAntialiasingMode mode)
	Sets the anti-aliasing mode of the object. More...
virtual void	setBackground (IlvColor *)
	Sets the background color of the object. More...
virtual void	setForeground (IlvColor *)
	Sets the foreground color of the object. More...
void	setMax (IlFloat max)
	Sets the maximum value of the gauge. More...
void	setMin (IlFloat min)
	Sets the minimum value of the gauge. More...
virtual void	setMode (IlvDrawMode)
	Sets the drawing mode of the object temporarily. More...
virtual void	setOverwrite (IlBoolean value)
	Sets an overwrite mode that modifies how the drawing member functions operate. More...
virtual void	setPalette (IlvPalette *)
	Sets the internal palette. More...
virtual void	setValue (IlFloat value)
	Sets the current value of the gauge. 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...
IlString	getCssElementName () const override
	Returns the DOM element name of this stylable object. 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...
IlvDisplay *	getStylableDisplay () const override
	Returns the display for this object. More...
IlString	getStylableName () const override
	Returns the name of this object. More...
IlvStylist *	getStylist () const override
	Returns the stylist for this 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	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, const IlSymbol *callbackName, const IlSymbol *script=0)
	Adds a callback function to a callback list. More...
void	addCallback (const IlSymbol *callbackType, IlvGraphicCallback callback)
	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, const char *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, IlInt 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	getAccessors (const IlSymbol *const **, const IlvValueTypeClass *const **, IlUInt &) const
	Retrieves the list of available accessors of an object. More...
IlvGraphicCallback	getCallback () const
	Gets the main callback function. More...
IlvGraphicCallback	getCallback (const IlSymbol *callbackType) const
	Gets a callback. More...
IlAny	getCallbackData (const IlSymbol *callbackType, const IlSymbol *callbackName) const
	Gets a callback user data. More...
IlAny	getCallbackData (const IlSymbol *callbackType, IlvGraphicCallback callback) const
	Gets a callback user data. More...
IlSymbol *	getCallbackName () const
	Gets the symbol that identifies the main callback. More...
IlSymbol *	getCallbackName (const IlSymbol *callbackType) const
	Gets the name of a 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 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, const IlSymbol *callbackName) const
	Checks whether a callback function is in a callback list. More...
IlBoolean	hasCallback (const IlSymbol *callbackType, IlvGraphicCallback callback) const
	Checks whether a callback function is in a callback list. More...
IlBoolean	hasCallbackData (const IlSymbol *callbackType, const IlSymbol *callbackName) const
	Checks whether a callback function has user data. More...
IlBoolean	hasCallbackData (const IlSymbol *callbackType, IlvGraphicCallback callback) 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...
IlBoolean	inside (const IlvRect &r) const
	Determines whether a rectangle 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...
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	intersects (const IlvRect &r) const
	Checks whether a rectangle intersects the bounding box. 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...
virtual IlBoolean	intersects (const IlvRegion &r, const IlvTransformer *t=0) const
	Checks whether a region intersects the bounding box with transformation applied. 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...
void	move (const IlvPoint &p)
	Moves the graphic object. More...
virtual void	move (IlvPos x, IlvPos y)
	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, const IlSymbol *callbackName)
	Removes a callback function from a callback list. More...
void	removeCallback (const IlSymbol *callbackType, IlvGraphicCallback callback)
	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, const IlSymbol *callbackName, const IlSymbol *script=0)
	Removes all previously set callbacks. More...
void	setCallback (const IlSymbol *callbackType, IlvGraphicCallback callback)
	Sets a new callback. 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, const IlSymbol *callbackName, IlAny data)
	Sets the callback user data for a callback function. More...
void	setCallbackData (const IlSymbol *callbackType, IlvGraphicCallback callback, 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 (const char *name)
	Attaches an interactor to this graphic object. More...
IlBoolean	setInteractor (IlvInteractor *inter)
	Attaches an interactor to the current 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...
Public Member Functions inherited from IlvStylable
	IlvStylable ()
	Constructor.
IlvStylable *	getChildStylable (const IlString &cssElementName) const
	Returns child stylable with specified css element name. Returns null if the child is not found. More...
virtual IlString	getCssElementClass () const
	Returns the DOM class of this stylable object. <cssElement class="cssClass"> More...
IlString	getCssElementId () const
	Returns the DOM element id of this stylable object. <cssElement id="cssId"> More...
virtual void	getOuterStylableSize (IlvDim &w, IlvDim &h) const
	Returns the size of the outer stylable if any. More...
virtual IlvStylable *	getStylableParent () const
	Returns the parent of this object in the style hierarchy. More...
virtual void	getStylableSize (IlvDim &w, IlvDim &h) const
	Returns the size of this object. More...
void	setCssId (const IlString &id)
	Sets the object's css styling id. The id is initially the same as the name property of the object, but can be overridden using this function. More...
virtual void	setupDefaultCssStyle ()
	virtual functions used to setupDefaultStyle. Override this to change default styling

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...
Static Public Member Functions inherited from IlvStylable
static void	DisableCssDom ()
	Disables any further DOM additions. More...

Detailed Description

Graphic class.

Library: views

A circular gauge holds a numeric value and displays it by means of a needle that defines a partial ellipse, as in the figure below (not including scale).

- Circular gauge -

Accessors\nAccessors provide a scriptable and uniform way to inspect and modify an object by using its base class methods <tt>IlvValueInterface::queryValue()</tt>, <tt>IlvValueInterface::queryValues()</tt>, <tt>IlvValueInterface::changeValue()</tt>, <tt>IlvValueInterface::changeValues()</tt>.\n\n\nThis class inherits the accessors of its superclass \c IlvGauge and adds the following ones:

Name	Type	Equivalent methods
start	Float	getStart(), setStart()
range	Float	getRange(), setRange()

Constructor & Destructor Documentation

IlvCircularGauge()

IlvCircularGauge::IlvCircularGauge	(	IlvDisplay *	display,
		const IlvRect &	drawrect,
		IlFloat	min = 0,
		IlFloat	max = 100,
		IlFloat	value = 50,
		IlFloat	start = 0,
		IlFloat	range = 180,
		IlvPalette *	palette = 0
	)

Constructor.

Parameters

display	The display object that displays this object.
drawrect	The initial size of this object.
min	The minimum value of the gauge.
max	The maximum value of the gauge.
value	The initial value of the gauge.
start	The starting angle of the gauge.
range	The angle range of the gauge.
palette	The palette used to draw this object.

Member Function Documentation

bboxRange()

virtual void IlvCircularGauge::bboxRange ( IlFloat  v1, IlFloat  v2, IlvRect &  rect, const IlvTransformer *  t = 0  ) const

virtual

Returns the rectangle to update when the value of the gauge changes.

Returns

The rectangular region to be updated if the value of the gauge was changing from v1 to v2.

Parameters

v1	Initial value of the gauge.
v2	Future value of the gauge.
rect	Used to return the rectangle to update.
t	The transformer. If it is specified, the graphic object is considered to be drawn through a transformation and the returned rectangle is expressed in the transformed coordinate system.

Implements IlvGauge.

boundingBox()

virtual void IlvCircularGauge::boundingBox ( IlvRect &  bbox, const IlvTransformer *  t = 0  ) const

virtual

Retrieves the bounding box of the graphic object.

Sets bbox, the rectangle reference parameter, to be the bounding box of the object. Since the object can appear within a transformed environment (for example, in a multiview editor), an IlvTransformer object occurs as an optional parameter in order to compute the bounding box in the coordinate system of the transformed environment.

Parameters

bbox	The bounding box to be set.
t	A transformer value or 0 if there is no transformation.

Implements IlvGauge.

computeNeedlePoints()

virtual IlUInt IlvCircularGauge::computeNeedlePoints ( IlvPoint *  points, const IlvTransformer *  t = 0  ) const

virtual

Computes the shape of the gauge handle.

Computes and fills an array of points defining the shape of the needle.

The member function draw, in its default implementation, starts by calling computeNeedlePoints with a 0 value for points, to guess how many points are to be taken into account. It then calls this function again, with an array large enough to actually compute the needle shape. Then it fills the defined polygon.

Parameters

points	The array of points filled by this method, or 0 if only the number of points is queried.
t	The transformer used to display the gauge.

Returns

The number of points. If points is not 0, this value is also the number of points copied in points.

contains()

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

virtual

Checks whether a point is in the object.

Checks whether the coordinates are located in the shape of this object. A transformation parameter allows you to use the view's coordinate system for this test.

Parameters

p	The point to be tested.
tp	The transformed point obtained by applying the transformer t to the point p.
t	A transformer value, or 0 if there is no transformation.

Returns

IlTrue when the point p lies inside the outline of the object.

Reimplemented from IlvGraphic.

drawValue()

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

virtual

Performs the drawing representing the current value of the gauge.

Called by the member function draw() and interactors that connect to it. Draws the part of the gauge that indicates its value (such as the hand of a watch).

Parameters

dst	The destination port.
t	The transformer to apply to the drawing.
clip	The clipping region.

Implements IlvGauge.

Reimplemented in IlvFilledCircularGauge.

getRange()

IlFloat IlvCircularGauge::getRange

(

)

const

Retrieves the angle range of the gauge.

Returns

The angle range of the gauge. The sum of this angle and the starting angle indicates the maximum value of this gauge.

getStart()

IlFloat IlvCircularGauge::getStart

(

)

const

Retrieves the starting angle of the gauge.

Returns

The starting angle of the gauge in degrees. This angle indicates the minimum value of this gauge.

requestValue()

virtual IlFloat IlvCircularGauge::requestValue ( const IlvPoint &  point, const IlvTransformer *  t, IlBoolean &  connect  ) const

virtual

Returns the value of the gauge associated with a given point.

Returns

the value stored in this gauge if its moving part was at the specified location. If the point is outside the object bounding box, the function returns a reasonable value (the closest point on the object bounding box is considered).

Parameters

point	The point. If a transformer is specified, the point is considered to be transformed, i.e. expressed in the transformed coordinate system.
t	The transformer.
connect	If IlTrue, the provided point indicates a connection to the gauge. Mostly, this means that the point is located on the moving part of the gauge.

Implements IlvGauge.

Reimplemented in IlvFilledCircularGauge.

setRange()

void IlvCircularGauge::setRange

(

IlFloat

range

)

Sets the angle range of the gauge.

Parameters

range

The new angle range of the gauge.

setStart()

void IlvCircularGauge::setStart

(

IlFloat

start

)

Sets the starting angle of the gauge.

Parameters

start

The new starting angle of this gauge.