Package com.luciad.view.gxy

Interface ILcdGXYMultiLabelPainter

All Superinterfaces:

Cloneable, ILcdGXYLabelPainter, Serializable

All Known Subinterfaces:

ILcdGXYLabelPainter2

All Known Implementing Classes:

ALcdGXYLabelPainter, TLcdAIXM51AirspaceLabelPainter, TLcdAIXM51NavaidLabelPainter, TLcdAIXM51XPathLabelPainter, TLcdGXYCompositeLabelPainter, TLcdGXYCurvedPathLabelPainter, TLcdGXYDataObjectLabelPainter, TLcdGXYDataObjectPolygonLabelPainter, TLcdGXYDataObjectPolylineLabelPainter, TLcdGXYFeaturedLabelPainter, TLcdGXYFeaturedPolygonLabelPainter, TLcdGXYFeaturedPolylineLabelPainter, TLcdGXYHaloLabelPainter, TLcdGXYHaloLabelPainter2, TLcdGXYLabelPainter, TLcdGXYLabelPainterAdapter, TLcdGXYMultiFontLabelPainter, TLcdGXYOffsetIconPainter, TLcdGXYOutlinePolylineLabelPainter, TLcdGXYPolygonLabelPainter, TLcdGXYPolygonStampLabelPainter, TLcdGXYPolylineLabelPainter, TLcdGXYPolylineStampLabelPainter, TLcdGXYProcedureTrajectoryLegLabelPainter, TLcdGXYStampLabelPainter, TLcdICAOAirspaceDetailedLabelPainter, TLcdICAOAirspaceLabelPainter, TLcdICAOAreaMinimumAltitudeLabelPainter, TLcdICAODMELabelPainter, TLcdICAONavaidLabelPainter, TLcdICAONDBLabelPainter, TLcdICAOTACANLabelPainter, TLcdICAOVORLabelPainter, TLcdMagneticNorthGXYLabelPainter, TLcdSLDFeatureTypeStylePainter, TLcdSLDRulePainter

public interface ILcdGXYMultiLabelPainter
extends ILcdGXYLabelPainter

A ILcdGXYMultiLabelPainter can paint multiple labels per object. More specifically, it supports multiple labels, each of which consists of one or more sublabels.

Multiple labels

In contrast to an ILcdGXYLabelPainter which could also be implemented to paint multiple labels per object, the labels of a ILcdGXYMultiLabelPainter are painted one after the other in the current view implementations. As a consequence the label bounds are computed sequentially per label (setLabelIndex(int)) and are smaller than the the combined bounds of the labels. This is mainly used in label decluttering.

Labels and sublabels

One label consists of one or more sublabels. It is up to the user of this interface (e.g. a ILcdLabelingAlgorithm) to decide how to interpret labels and sublabels.

One possible interpretation is to decide that if a label is painted, all of its sublabels are painted, if not, none of its sublabels are painted. A scenario for this interpretation could be street labeling, where the full street name is displayed every few segments. Here, the labels of the ILcdGXYMultiLabelPainter would be the street name, and the sublabels would be the individual words of the street name.

One other possible interpretation could be to fix the location of sublabels of a single label so that they move together. A scenario for this is when the object's representation is painted as one or more offset labels, with some extra text labels attached to each of them. Here, the labels of the ILcdGXYMultiLabelPainter would be the offset labels, and the sublabels would be the extra text labels surrounding each offset label.

Usage

This interface requires to set an object, a location index and the label- and sublabel-index before the other methods can be used.

See Also:

• ILcdGXYLabelingAlgorithm

Field Summary

Fields inherited from interface com.luciad.view.gxy.ILcdGXYLabelPainter

DEFAULT, SELECTED

Method Summary

Modifier and Type	Method	Description
int	getLabelCount(Graphics aGraphics, ILcdGXYContext aGXYContext)	Returns the number of labels for the object set to this label painter.
int	getLabelIndex()	Returns the index of the label that is currently painted or scheduled to paint.
int	getSubLabelCount(int aLabelIndex)	Return the number of sublabels in a label.
int	getSubLabelIndex()	Returns the index of the sublabel to paint.
void	setLabelIndex(int aLabelIndex)	Sets the label.
void	setSubLabelIndex(int aSubLabelIndex)	Sets the sublabel index.

Methods inherited from interface com.luciad.view.gxy.ILcdGXYLabelPainter

clone, getLocationIndex, getObject, getPossibleLocationCount, labelBoundsSFCT, paintLabel, setLocationIndex, setObject

Method Details

setLabelIndex

void setLabelIndex(int aLabelIndex)

Sets the label. The results of any subsequent method calls to ILcdGXYLabelPainter.paintLabel(java.awt.Graphics, int, com.luciad.view.gxy.ILcdGXYContext) and ILcdGXYLabelPainter.labelBoundsSFCT(java.awt.Graphics, int, com.luciad.view.gxy.ILcdGXYContext, java.awt.Rectangle) etc. will apply to the label and sublabel indicated by this label index.

Parameters:

aLabelIndex - The label index. This should be larger than or equal to 0 and less than the result getLabelCount(java.awt.Graphics, com.luciad.view.gxy.ILcdGXYContext).

See Also:

• setSubLabelIndex(int)

getLabelIndex

int getLabelIndex()

Returns the index of the label that is currently painted or scheduled to paint.

Returns:

the index of the label that is currently painted or scheduled to paint.

See Also:

• setLabelIndex(int)

getLabelCount

int getLabelCount(Graphics aGraphics,
 ILcdGXYContext aGXYContext)

Returns the number of labels for the object set to this label painter.

Note: when returning multiple (moveable) labels for the same object, it might be useful to use TLcdGXYEditControllerModel2.EDIT_WHAT_FIRST_TOUCHED_LABEL to avoid that a mouse drag moves them all together.

Parameters:

aGraphics - The Graphics currently painting on

aGXYContext - The ILcdGXYContext currently valid

Returns:

The number of label for the given object.

getSubLabelIndex

int getSubLabelIndex()

Returns the index of the sublabel to paint.

Returns:

the index of the sublabel to paint.

See Also:

• setSubLabelIndex(int)

setSubLabelIndex

void setSubLabelIndex(int aSubLabelIndex)

Sets the sublabel index. The results of any subsequent method calls to ILcdGXYLabelPainter.paintLabel(java.awt.Graphics, int, com.luciad.view.gxy.ILcdGXYContext) and ILcdGXYLabelPainter.labelBoundsSFCT(java.awt.Graphics, int, com.luciad.view.gxy.ILcdGXYContext, java.awt.Rectangle) etc. will apply to the label and sublabel indicated by this sublabel index.

Parameters:

aSubLabelIndex - The sub label index. This should be larger than or equal to 0 and less than the result getSubLabelCount(int).

See Also:

• setLabelIndex(int)

getSubLabelCount

int getSubLabelCount(int aLabelIndex)

Return the number of sublabels in a label. The value should be 1 or higher.

Parameters:

aLabelIndex - the index of the label.

Returns:

The number of sublabels of the label with the given index.