IlvPolySelection Class Reference

Graphic class. More...

#include <ilviews/graphics/polysel.h>

Inheritance diagram for IlvPolySelection:

List of all members.

Public Member Functions
	IlvPolySelection (IlvPolyPoints *object, IlUShort size=4, IlvMarkerType marker=IlvMarkerFilledSquare, IlvPalette *palette=0)
	Constructor.
void	apply (IlvApplyObject mapf, IlAny arg)
	Applies a function to an IlvPolyPoints object.
virtual void	applyTransform (const IlvTransformer *t)
	Applies a transformation function to the graphic object.
virtual void	boundingBox (IlvRect &r, const IlvTransformer *t=0) const
	Retrieves the bounding box of the graphic object.
const char *	className () const
	Returns the class name of an object.
virtual IlBoolean	contains (const IlvPoint &p, const IlvPoint &tp, const IlvTransformer *t=0) const
	Checks whether a point is in the object.
virtual IlvGraphic *	copy () const
	Copies this object.
virtual void	draw (IlvPort *dst, const IlvTransformer *t=0, const IlvRegion *clip=0) const
	Draws the graphic object.
virtual IlvClassInfo *	getClassInfo () const
	Gets class information.
IlvPolyPoints *	getObject () const
	Gets an IlvPolyPoints object.
void	getPoint (IlvPoint &point, IlUInt idx) const
	Gets a point located at an index.
virtual IlInt	getPointIndex (const IlvPoint &point, const IlvTransformer *) const
	Gets a marker index containing a point.
IlUShort	getSize () const
	Gets the marker size.
IlBoolean	isSubtypeOf (const IlvClassInfo *c) const
	Checks whether this object's class is a subclass.
IlBoolean	isSubtypeOf (const char *t) const
	Checks whether this object's class is a subclass of a given parent class.
virtual void	setMode (IlvDrawMode)
	Sets the drawing mode of the object temporarily.
void	setObject (IlvPolyPoints *object)
	Sets an IlvPolyPoints object.
void	setPoint (const IlvPoint &point, IlUInt idx)
	Sets a point located at an index.
void	setSize (IlUShort size)
	Sets the marker size.
void	translatePoint (const IlvPoint &delta, IlUInt idx)
	Translates a point located at an index.
virtual void	write (IlvOutputFile &) const
	Writes an object description to a file.
Static Public Member Functions
static void	AddProperty (const IlSymbol *k, IlAny v)
	Adds a property to this object's class.
static IlAny	GetProperty (const IlSymbol *key, IlBoolean p=((IlBoolean) 0))
	Retrieves the property value associated with the key in this object's class.
static const IlvClassInfo *	HasProperty (const IlSymbol *key, IlBoolean p=((IlBoolean) 0))
	Checks for the existence of a property for this object's class hierarchy.
static IlvGraphic *	read (IlvInputFile &, IlvPalette *pal)
	Reads an object description from a file.
static IlBoolean	RemoveProperty (const IlSymbol *key)
	Removes a property from this object's class.
static IlBoolean	ReplaceProperty (const IlSymbol *k, IlAny v)
	Replaces a property in this object's class.

---

Detailed Description

Graphic class.

Library: views

This class is kept for compatibility reasons only. The class IlvPolyPointsSelection fills its role in a more general and extensible manner. The IlvPolySelection class is used to fill squares on all the points of an object of type IlvPolyPoints.

- IlvPolySelection -

See also:

IlvMarker.

---

Constructor & Destructor Documentation

IlvPolySelection::IlvPolySelection	(	IlvPolyPoints *	object,
		IlUShort	size = 4,
		IlvMarkerType	marker = IlvMarkerFilledSquare,
		IlvPalette *	palette = 0
	)

Constructor.

The constructor initializes a new IlvPolySelection object. The size of the side of a handle is provided by handleSize. Handles are drawn using an IlvMarker graphic object. This marker is indicated by the markerType parameter.

Parameters:

	object	The object of type IlvPolyPoints.
	handleSize	The size of the side of a handle.
	markerType	The marker type.
	palette	The palette of the object.

---

Member Function Documentation

static void IlvPolySelection::AddProperty	(	const IlSymbol *	key,
		IlAny	value
	)			[static]

Adds a property to this object's class.

This static function associates the given value with the given key for the class of this object only.

Parameters:

	key	The key to be associated.
	value	The value to be associated.

Reimplemented from IlvSimpleGraphic.

void IlvPolySelection::apply	(	IlvApplyObject	mapf,
		IlAny	arg
	)			[virtual]

Applies a function to an IlvPolyPoints object.

Applies the function f to the referenced IlvPolyPoints object, with the user argument arg.

Parameters:

	f	The function to be applied.
	arg	A user argument.

Reimplemented from IlvGraphic.

virtual void IlvPolySelection::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.

Warning:

[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.

virtual void IlvPolySelection::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. When there is no transformation, t is set to 0.

Parameters:

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

Implements IlvGraphic.

const char* IlvPolySelection::className

(

)

const

Returns the class name of an object.

This method is equivalent to getClassInfo()->getClassName().

Returns:

The class name of the object. For example, for an IlvRectangle object, the className function returns "IlvRectangle".

Reimplemented from IlvSimpleGraphic.

virtual IlBoolean IlvPolySelection::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.

virtual IlvGraphic* IlvPolySelection::copy

(

)

const [virtual]

Copies this object.

Allocates and returns a copy of this object. If the object is composite, the implementation of this member function makes a copy of the object's components.

Returns:

A copy of the object.

See also:

IlvPredefinedIOMembers.

Implements IlvGraphic.

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

Draws the graphic object.

Draws the object in the given IlvPort using the transformer t which might have the value 0. The clip parameter, which can also be 0, represents the clipping region relative to the transformed object.

Parameters:

	dst	The destination port.
	t	The transformer value. If 0, no transformation is performed.
	clip	The clipping region, or 0 if none.

Implements IlvGraphic.

virtual IlvClassInfo* IlvPolySelection::getClassInfo

(

)

const [virtual]

Gets class information.

Returns a pointer to the IlvClassInfo object associated with this object's class.

Returns:

A pointer to the class information object of the class of this object.

Reimplemented from IlvSimpleGraphic.

IlvPolyPoints* IlvPolySelection::getObject

(

)

const

Gets an IlvPolyPoints object.

Returns:

The IlvPolyPoints used by the object.

void IlvPolySelection::getPoint	(	IlvPoint &	point,
		IlUInt	idx
	)			const

Gets a point located at an index.

Parameters:

index

The index. The first point has an index of 0.

Returns:

In point the coordinates of the point of the referenced IlvPolyPoints located at index index.

virtual IlInt IlvPolySelection::getPointIndex	(	const IlvPoint &	point,
		const IlvTransformer *
	)			const [virtual]

Gets a marker index containing a point.

Parameters:

	point	The point specifying the first marker.
	t	The transformer value.

Returns:

The index of the first marker that contains point, when this object is drawn by the transformer t. If no such point exists, it returns -1.

static IlAny IlvPolySelection::GetProperty	(	const IlSymbol *	key,
		IlBoolean	checkSuperClass = ((IlBoolean) 0)
	)			[static]

Retrieves the property value associated with the key in this object's class.

Retrieves the property value associated with the property name key. If the property cannot be found in the class of this object, and if checkSuperClass is set to IlTrue, then the function operates iteratively on each superclass until the property is found. If the property cannot be found, then 0 is returned.

Parameters:

	key	The key with which the property value is associated.
	checkSuperClass	IlTrue specifies iterative search on superclasses.

Returns:

The property value associated with the proper name key, or 0.

Reimplemented from IlvSimpleGraphic.

IlUShort IlvPolySelection::getSize

(

)

const

Gets the marker size.

Returns:

The size of the markers drawn around the points defining the referenced IlvPolyPoints.

static const IlvClassInfo* IlvPolySelection::HasProperty	(	const IlSymbol *	key,
		IlBoolean	checkSuperClass = ((IlBoolean) 0)
	)			[static]

Checks for the existence of a property for this object's class hierarchy.

Retrieves a pointer to the IlvClassInfo that indicates a class where the key property exists. If the returned value is non-0, then this property actually exists for this class. If this is not the case and if checkSuperClass is set to IlTrue, then the function operates iteratively on each superclass until a match is found. If the property cannot be found, then 0 is returned.

Parameters:

	key	The key with which the property value is associated.
	checkSuperClass	IlTrue specifies iterative search on superclasses.

Returns:

A pointer to the ClassInfo that indicates a class where the key property exists, or 0.

Reimplemented from IlvSimpleGraphic.

IlBoolean IlvPolySelection::isSubtypeOf

(

const IlvClassInfo *

classInfo

)

const

Checks whether this object's class is a subclass.

This method is equivalent to getClassInfo()->isSubtypeOf(classInfo).

Parameters:

classInfo

The name of a class on which the object's class is tested.

Returns:

Either IlTrue or IlFalse, depending on whether or not this object's class is a subclass of the class indicated by classInfo.

Reimplemented from IlvSimpleGraphic.

IlBoolean IlvPolySelection::isSubtypeOf

(

const char *

parentClass

)

const

Checks whether this object's class is a subclass of a given parent class.

This method is equivalent to getClassInfo()->isSubtypeOf(parentClass).

Parameters:

parentClass

A string representing the parent class.

Returns:

Either IlTrue or IlFalse, depending on whether or not this object's class inherits parentClass attributes. The parentClass parameter should be a string representing the class name of an IlvGraphic subclass. A call to this member function for a given class instance returns IlTrue if given the name of its class.

Reimplemented from IlvSimpleGraphic.

static IlvGraphic* IlvPolySelection::read	(	IlvInputFile &	file,
		IlvPalette *	palette
	)			[static]

Reads an object description from a file.

Reads an object description from the file input, given the palette graphic attributes. It reads the information that was saved by the member function write to be able to create a new instance of this object. Usually, because of the availability of the constructor that expects an IlvInputFile, read should be equivalent to:

 IlvGraphic*
 MyClass::read(IlvInputFile& file, IlvPalette* palette)
 {
     return new MyClass(file, palette);
 }

In the following example, the static member function read of the IlvLabel class could have the following form:

 IlvGraphic*
 IlvLabel::read(IlvInputFile& file, IlvPalette* pal)
 {
     IlvPoint pos;
     file.getStream() >> pos;     // Read the position field
     return new IlvLabel(pal->getDisplay(), pos,
     IlvReadString(file.getStream()), pal);
 }

Parameters:

	file	The name of the file to be read from.
	palette	The name of the palette for the object.

See also:

DeclareTypeInfoRO, DeclareTypeInfo, IlvPredefinedIOMembers.

Warning:

[note] The read method is not capitalized like other static methods so that it is consistent with the write method.

Reimplemented from IlvGraphic.

static IlBoolean IlvPolySelection::RemoveProperty

(

const IlSymbol *

key

)

[static]

Removes a property from this object's class.

This static function removes the indicated property to the class of this object.

Parameters:

key

The key property to be removed.

Returns:

IlTrue if the key property was actually found, or IlFalse otherwise.

Reimplemented from IlvSimpleGraphic.

static IlBoolean IlvPolySelection::ReplaceProperty	(	const IlSymbol *	key,
		IlAny	value
	)			[static]

Replaces a property in this object's class.

This static function replaces the indicated property value to the class of this object.

Parameters:

	key	The key to be replaced.
	value	The value to be replaced.

Returns:

IlTrue if the key property was actually found, or IlFalse otherwise.

Reimplemented from IlvSimpleGraphic.

virtual void IlvPolySelection::setMode

(

IlvDrawMode

mode

)

[virtual]

Sets the drawing mode of the object temporarily.

Changing the IlvDrawMode attribute of an object is considered a temporary operation. You have to set the mode to its default value when you no longer need another mode different from the value IlvModeSet. The drawing mode information is passed to the palette of the graphic object (see the IlvPalette::setOverwrite method for more details).

Parameters:

mode

The drawing mode to be set.

Reimplemented from IlvSimpleGraphic.

void IlvPolySelection::setObject

(

IlvPolyPoints *

object

)

Sets an IlvPolyPoints object.

Sets the IlvPolyPoints used by the object.

void IlvPolySelection::setPoint	(	const IlvPoint &	point,
		IlUInt	idx
	)

Sets a point located at an index.

Modifies the point of the referenced IlvPolyPoints at index index.

Parameters:

	point	The point to be set.
	index	The index.

void IlvPolySelection::setSize

(

IlUShort

size

)

Sets the marker size.

Sets the size of the sides of the markers drawn around the points defining the referenced IlvPolyPoints.

Parameters:

size

The size of the sides of the markers.

void IlvPolySelection::translatePoint	(	const IlvPoint &	delta,
		IlUInt	idx
	)

Translates a point located at an index.

Translates the point of the referenced IlvPolyPoints at index index.

Parameters:

	delta	The translation factor.
	index	The index. An index set to 0 indicates the first point.

virtual void IlvPolySelection::write

(

IlvOutputFile &

output

)

const [virtual]

Writes an object description to a file.

Writes out, in a file, the object description. This description contains all the information necessary to create an exact copy of this object by means of the member function read. Information concerning any IlvPalette object attached to this object is written out by the object containers. All other information, such as the position and size of the object, is written out by this virtual member function.
For example, suppose we have an IlvLabel class that implements a graphic object drawn as a text string at a given position. It maintains its position in an internal IlvPoint field called _position and its textual content in an internal character array field called _text. The only information we need to save is the contents of those fields. So, the member function write of such an object should have the following form:

 void
 IlvLabel::write(IlvOutputFile& file) const
 {
     // Save the position field
     file.getStream() << IlvSpc() << _position;
     // Save the text field
     IlvWriteString(file.getStream(), _text);
 }

Parameters:

output

The the output file to be written to.

See also:

DeclareTypeInfo.

Implements IlvGraphic.