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IlvFeatureRenderer Class Referenceabstract

Subclasses of this abstract class are used to translate an IlvMapFeature into a graphic object. More...

#include <ilviews/maps/renderer.h>

Inheritance diagram for IlvFeatureRenderer:
IlvDefaultAreaRenderer IlvDefaultCurveRenderer IlvDefaultFeatureRenderer IlvDefaultImageRenderer IlvDefaultPointRenderer IlvDefaultRasterRenderer IlvDefaultTextRenderer IlvIconPointRenderer

Public Member Functions

virtual IlvFeatureRenderercopy () const =0
 Copies the object. More...
 
IlvDisplaygetDisplay () const
 Returns the renderer display. More...
 
IlBoolean isPersistent () const
 Checks if the renderer can be saved. More...
 
virtual IlvGraphicmakeGraphic (const IlvMapFeature &feature, const IlvMapInfo &targetMapInfo, IlvMapsError &status) const =0
 Translates an IlvMapFeature into a graphic object. More...
 
void save (IlvOutputFile &file) const
 Saves the object to an IlvOutputFile. More...
 
virtual void write (IlvOutputFile &file) const =0
 Writes the renderer to an IlvOutputStream. More...
 

Static Public Member Functions

static IlvFeatureRendererLoad (IlvInputFile &file)
 Loads a renderer from an IlvInputFile. More...
 

Protected Member Functions

 IlvFeatureRenderer (IlvDisplay *display, IlBoolean persistent=IlTrue)
 Constructor. More...
 

Detailed Description

Subclasses of this abstract class are used to translate an IlvMapFeature into a graphic object.

Library: ilvmaps

See also
IlvDefaultFeatureRenderer

Constructor & Destructor Documentation

IlvFeatureRenderer::IlvFeatureRenderer ( IlvDisplay display,
IlBoolean  persistent = IlTrue 
)
protected

Constructor.

The constructor of this abstract class is protected.

Parameters
displayThe display for which the graphic objects will be created.
persistentSpecifies if the renderer can be saved by the objects that use it.

Member Function Documentation

virtual IlvFeatureRenderer* IlvFeatureRenderer::copy ( ) const
pure virtual

Copies the object.

Returns
A copy of this IlvFeatureRenderer.
IlvDisplay* IlvFeatureRenderer::getDisplay ( ) const

Returns the renderer display.

Returns
The renderer display that is used to create the graphic objects.
IlBoolean IlvFeatureRenderer::isPersistent ( ) const

Checks if the renderer can be saved.

Returns
IlTrue if the renderer can be saved by the objects that use it.
static IlvFeatureRenderer* IlvFeatureRenderer::Load ( IlvInputFile file)
static

Loads a renderer from an IlvInputFile.

Parameters
fileThe input file.
Returns
An IlvFeatureRenderer or a null pointer if the load operation fails.
virtual IlvGraphic* IlvFeatureRenderer::makeGraphic ( const IlvMapFeature feature,
const IlvMapInfo targetMapInfo,
IlvMapsError &  status 
) const
pure virtual

Translates an IlvMapFeature into a graphic object.

If the targetMapInfo has a non-null projection, or a projection that is not an instance of IlvUnknownProjection, the graphic object is projected to the projection system of targetMapInfo. Otherwise, only the map adapter of targetMapInfo is used to convert the feature coordinate into the manager coordinate system.

Parameters
featureThe map feature to be translated.
targetMapInfoThis parameter specifies the projection in which the graphic object must be returned. If this projection is not defined (targetMapInfo.getProjection() is NULL), the graphic object is returned to the projection of the map feature (only the map adapter is used)
statusIs set to an error code if the renderer cannot process the map feature (most of the time, because the renderer does not support the feature geometry, but it can also indicate that a projection error occurred).
Returns
An IlvGraphic or a null pointer if a severe error occurred.

Implemented in IlvDefaultCurveRenderer, IlvDefaultPointRenderer, IlvDefaultFeatureRenderer, IlvDefaultRasterRenderer, IlvIconPointRenderer, IlvDefaultTextRenderer, IlvDefaultAreaRenderer, and IlvDefaultImageRenderer.

void IlvFeatureRenderer::save ( IlvOutputFile file) const

Saves the object to an IlvOutputFile.

Parameters
fileThe output file.
See also
Load
virtual void IlvFeatureRenderer::write ( IlvOutputFile file) const
pure virtual

Writes the renderer to an IlvOutputStream.

This function must be reimplemented by the subclasses of IlvFeatureRenderer, but it should not be called directly by the application. For more information about subclassing an IlvFeatureRenderer, refer to the User Manual of Rogue Wave Views Maps.

Parameters
fileThe output file.
See also
save

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