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IlvGraphicInstance Class Reference

Graphic handle class. More...

#include <ilviews/graphics/handle.h>

Inheritance diagram for IlvGraphicInstance:
IlvTransformedGraphic IlvGraphicHandle IlvGraphic

List of all members.

Public Member Functions

 IlvGraphicInstance (IlvGraphic *obj, const IlvTransformer &t, IlvPalette *palette, IlBoolean owner=((IlBoolean) 0))
 Constructor.
 IlvGraphicInstance (IlvGraphic *obj, IlvPalette *palette, IlBoolean owner=((IlBoolean) 0))
 Constructor.
virtual IlBoolean applyValue (const IlvValue &)
 Apply an accessor.
const char * className () const
 Returns the class name of an object.
virtual IlvGraphiccopy () const
 Copies this object.
virtual void draw (IlvPort *dst, const IlvTransformer *t=0, const IlvRegion *clip=0) const
 Draws the graphic object.
IlvAntialiasingMode getAntialiasingMode () const
 Retrieves the anti-aliasing mode.
IlvArcMode getArcMode () const
 Retrieves the arc mode.
IlvColorgetBackground () const
 Retrieves the background color.
virtual IlvClassInfogetClassInfo () const
 Gets class information.
IlvColorPatterngetColorPattern () const
 Retrieves the color pattern.
IlvFillRule getFillRule () const
 Retrieves the fill rule.
IlvFillStyle getFillStyle () const
 Retrieves the fill style.
IlvFontgetFont () const
 Retrieves the font.
IlvColorgetForeground () const
 Retrieves the foreground color.
IlvGradientPatterngetGradientPattern () const
 Retrieves the gradient pattern.
IlvLineStylegetLineStyle () const
 Retrieves the line style.
IlUShort getLineWidth () const
 Retrieves the line width.
IlvDrawMode getMode () const
 Retrieves the draw mode.
IlBoolean getOverwrite () const
 Retrieves the overwrite mode.
IlvPalettegetPalette () const
 Retrieves the internal palette value.
IlvPatterngetPattern () const
 Retrieves the pattern.
virtual void invert (IlBoolean temp=((IlBoolean) 0))
 Highlights the object.
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 IlvValuequeryValue (IlvValue &) const
 Retrieves the value of an accessor.
virtual void setAntialiasingMode (IlvAntialiasingMode mode)
 Sets the anti-aliasing mode of the object.
virtual void setArcMode (IlvArcMode m)
 Sets the arc mode of the object.
virtual void setBackground (IlvColor *c)
 Sets the background color of the object.
virtual void setColorPattern (IlvColorPattern *b)
 Sets the color pattern of the object.
virtual void setFillRule (IlvFillRule m)
 Sets the fill rule of the object.
virtual void setFillStyle (IlvFillStyle f)
 Sets the fill style of the object.
virtual void setFont (IlvFont *f)
 Sets the font of the object.
virtual void setForeground (IlvColor *c)
 Sets the foreground color of the object.
virtual void setGradientPattern (IlvGradientPattern *g)
 Sets the gradient pattern of the object.
virtual void setLineStyle (IlvLineStyle *style)
 Sets the line style of the object.
virtual void setLineWidth (IlUShort width)
 Sets the line width of the object.
virtual void setMode (IlvDrawMode m)
 Sets the drawing mode of the object temporarily.
virtual void setOverwrite (IlBoolean value)
 Sets an overwrite mode that modifies how the drawing member functions operate.
void setPalette (IlvPalette *palette)
 Sets the palette of the object.
virtual void setPattern (IlvPattern *p)
 Sets the pattern of the object.
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 IlvClassInfoHasProperty (const IlSymbol *key, IlBoolean p=((IlBoolean) 0))
 Checks for the existence of a property for this object's class hierarchy.
static IlvGraphicread (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 handle class.

Library: views

The IlvGraphicInstance references another graphic object so that it can be drawn with another palette's attributes or transformation.


Constructor & Destructor Documentation

IlvGraphicInstance::IlvGraphicInstance ( IlvGraphic obj,
IlvPalette palette,
IlBoolean  owner = ((IlBoolean)0) 
)

Constructor.

Parameters:
object The object to be referenced.
palette The palette that is used to display the object. This palette is locked in this constructor.
owner The ownership of this handle on the referenced object.
IlvGraphicInstance::IlvGraphicInstance ( IlvGraphic obj,
const IlvTransformer t,
IlvPalette palette,
IlBoolean  owner = ((IlBoolean)0) 
)

Constructor.

Parameters:
obj The object to be referenced.
t The initial transformation that encapsulates obj.
palette The palette that is used to display the object. This palette is locked in this constructor.
owner The ownership of this handle on the referenced object.

Member Function Documentation

static void IlvGraphicInstance::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 IlvTransformedGraphic.

virtual IlBoolean IlvGraphicInstance::applyValue ( const IlvValue val  )  [virtual]

Apply an accessor.

This member function is called by changeValue(s) functions and must not be called directly.
Moreover, no drawing operations are carried out here (and should not be). The drawing operations are called by the changeValue(s) member functions, after having processed the call to applyValue. If you add your own new IlvValue, do not forget to override applyValue as well as changeValue and queryValue, since applyValue is called by changeValue.

Parameters:
val The new value of the accessor.

Reimplemented from IlvGraphicHandle.

const char* IlvGraphicInstance::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 IlvTransformedGraphic.

virtual IlvGraphic* IlvGraphicInstance::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.

Reimplemented from IlvTransformedGraphic.

virtual void IlvGraphicInstance::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.

Reimplemented from IlvTransformedGraphic.

IlvAntialiasingMode IlvGraphicInstance::getAntialiasingMode (  )  const [virtual]

Retrieves the anti-aliasing mode.

Returns:
The IlvPalette::getAntialiasingMode value of the palette.

Reimplemented from IlvGraphicHandle.

IlvArcMode IlvGraphicInstance::getArcMode (  )  const

Retrieves the arc mode.

Returns:
The IlvPalette::getArcMode value of the palette.
IlvColor* IlvGraphicInstance::getBackground (  )  const

Retrieves the background color.

Returns:
The IlvPalette::getBackground value of the palette.
virtual IlvClassInfo* IlvGraphicInstance::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 IlvTransformedGraphic.

IlvColorPattern* IlvGraphicInstance::getColorPattern (  )  const

Retrieves the color pattern.

Returns:
The IlvPalette::getColorPattern value of the palette.
IlvFillRule IlvGraphicInstance::getFillRule (  )  const

Retrieves the fill rule.

Returns:
The IlvPalette::getFillRule value of the palette.
IlvFillStyle IlvGraphicInstance::getFillStyle (  )  const

Retrieves the fill style.

Returns:
The IlvPalette::getFillStyle value of the palette.
IlvFont* IlvGraphicInstance::getFont (  )  const

Retrieves the font.

Returns:
The IlvPalette::getFont value of the palette.
IlvColor* IlvGraphicInstance::getForeground (  )  const

Retrieves the foreground color.

Returns:
The IlvPalette::getForeground value of the palette.
IlvGradientPattern* IlvGraphicInstance::getGradientPattern (  )  const

Retrieves the gradient pattern.

Returns:
The IlvPalette::getGradientPattern value of the palette.
IlvLineStyle* IlvGraphicInstance::getLineStyle (  )  const

Retrieves the line style.

Returns:
The IlvPalette::getLineStyle value of the palette.
IlUShort IlvGraphicInstance::getLineWidth (  )  const [virtual]

Retrieves the line width.

Returns:
The line width of the object.

Reimplemented from IlvGraphicHandle.

IlvDrawMode IlvGraphicInstance::getMode (  )  const

Retrieves the draw mode.

Returns:
The IlvPalette::getMode value of the palette.
IlBoolean IlvGraphicInstance::getOverwrite (  )  const

Retrieves the overwrite mode.

Returns:
The IlvPalette::getOverwrite value of the palette.
IlvPalette* IlvGraphicInstance::getPalette (  )  const

Retrieves the internal palette value.

Returns:
A pointer to the internal palette value.
IlvPattern* IlvGraphicInstance::getPattern (  )  const

Retrieves the pattern.

Returns:
The IlvPalette::getPattern value of the palette.
static IlAny IlvGraphicInstance::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 IlvTransformedGraphic.

static const IlvClassInfo* IlvGraphicInstance::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 IlvTransformedGraphic.

virtual void IlvGraphicInstance::invert ( IlBoolean  temp = ((IlBoolean) 0)  )  [virtual]

Highlights the object.

Highlights the object. It is implemented as swapping the foreground and background colors of the object, but can have other implementations in derived subclasses. The parameter temp controls the way you toggle between the background and the foreground. If temp is omitted or is IlFalse, then a new palette is computed by calling the IlvDisplay::getPalette() method. If temp is IlTrue, the object palette is inverted, and thus all the objects referencing this palette will be affected.

Parameters:
temp If IlTrue, highlights the object.

Reimplemented from IlvGraphicHandle.

IlBoolean IlvGraphicInstance::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 IlvTransformedGraphic.

IlBoolean IlvGraphicInstance::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 IlvTransformedGraphic.

virtual IlvValue& IlvGraphicInstance::queryValue ( IlvValue val  )  const [virtual]

Retrieves the value of an accessor.

Retrieves the value of the accessor val. The queryValue method can be used in the following way:

 IlvValue arg("label");
 char* label = (char*)labelObject->queryValue(arg);

See IlvValue for more information.

Returns:
The value of the accessor in val.

Reimplemented from IlvGraphicHandle.

static IlvGraphic* IlvGraphicInstance::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 IlvTransformedGraphic.

static IlBoolean IlvGraphicInstance::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 IlvTransformedGraphic.

static IlBoolean IlvGraphicInstance::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 IlvTransformedGraphic.

virtual void IlvGraphicInstance::setAntialiasingMode ( IlvAntialiasingMode  mode  )  [virtual]

Sets the anti-aliasing mode of the object.

Parameters:
mode The new anti-aliasing mode.

Reimplemented from IlvGraphicHandle.

virtual void IlvGraphicInstance::setArcMode ( IlvArcMode  mode  )  [virtual]

Sets the arc mode of the object.

Parameters:
mode The new arc mode.

Reimplemented from IlvGraphicHandle.

virtual void IlvGraphicInstance::setBackground ( IlvColor background  )  [virtual]

Sets the background color of the object.

Sets the background color of the object.

Parameters:
background The new background color.

Reimplemented from IlvGraphicHandle.

virtual void IlvGraphicInstance::setColorPattern ( IlvColorPattern pattern  )  [virtual]

Sets the color pattern of the object.

Sets the color pattern of the object.

Parameters:
pattern The new color pattern.

Reimplemented from IlvGraphicHandle.

virtual void IlvGraphicInstance::setFillRule ( IlvFillRule  rule  )  [virtual]

Sets the fill rule of the object.

Parameters:
rule The new fill rule.

Reimplemented from IlvGraphicHandle.

virtual void IlvGraphicInstance::setFillStyle ( IlvFillStyle  style  )  [virtual]

Sets the fill style of the object.

Parameters:
style The new fill style.

Reimplemented from IlvGraphicHandle.

virtual void IlvGraphicInstance::setFont ( IlvFont font  )  [virtual]

Sets the font of the object.

Parameters:
font The new font.

Reimplemented from IlvGraphicHandle.

virtual void IlvGraphicInstance::setForeground ( IlvColor foreground  )  [virtual]

Sets the foreground color of the object.

Sets the foreground color of the object.

Parameters:
foreground The new foreground color.

Reimplemented from IlvGraphicHandle.

virtual void IlvGraphicInstance::setGradientPattern ( IlvGradientPattern pattern  )  [virtual]

Sets the gradient pattern of the object.

Sets the gradient pattern of the object.

Parameters:
pattern The new gradient pattern.

Reimplemented from IlvGraphicHandle.

virtual void IlvGraphicInstance::setLineStyle ( IlvLineStyle style  )  [virtual]

Sets the line style of the object.

Parameters:
style The new line style.

Reimplemented from IlvGraphicHandle.

virtual void IlvGraphicInstance::setLineWidth ( IlUShort  width  )  [virtual]

Sets the line width of the object.

Parameters:
width The new line width.

Reimplemented from IlvGraphicHandle.

virtual void IlvGraphicInstance::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 IlvGraphicHandle.

virtual void IlvGraphicInstance::setOverwrite ( IlBoolean  over  )  [virtual]

Sets an overwrite mode that modifies how the drawing member functions operate.

Modifies the way the drawing member functions operate. The information is passed to the palette of the graphic object (see the IlvPalette::setOverwrite method for more details).

Parameters:
over If IlFalse, sets selective hidden drawing operations.

Reimplemented from IlvGraphicHandle.

void IlvGraphicInstance::setPalette ( IlvPalette palette  )  [virtual]

Sets the palette of the object.

Each of the graphic properties of this object is then taken from this IlvPalette instance.

Parameters:
palette The palette to be set.

Reimplemented from IlvGraphicHandle.

virtual void IlvGraphicInstance::setPattern ( IlvPattern pattern  )  [virtual]

Sets the pattern of the object.

Sets the pattern of the object.

Parameters:
pattern The new pattern.

Reimplemented from IlvGraphicHandle.

virtual void IlvGraphicInstance::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.

Reimplemented from IlvTransformedGraphic.


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