Package org.openstreetmap.josm.gui.mappaint.styleelement.placement

Class OnLineStrategy

java.lang.Object

org.openstreetmap.josm.gui.mappaint.styleelement.placement.OnLineStrategy

All Implemented Interfaces:

PositionForAreaStrategy

public class OnLineStrategy
extends java.lang.Object
implements PositionForAreaStrategy

Places the label onto the line.

Since:

11722, 11748 moved to own file

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private class	OnLineStrategy.GlyphRotatingVisitor	Rotate the glyphs along a path.
private static class	OnLineStrategy.HalfSegment	A half segment that can be used to place text on it.
private static class	OnLineStrategy.OffsetGlyph
private static class	OnLineStrategy.UpsideComputingVisitor	A visitor that computes the side of the way that is the upper one for each segment and computes the dominant upper side of the way.

Field Summary

Fields

Modifier and Type	Field	Description
static OnLineStrategy	INSTANCE	An instance of this class.
private double	yOffset

Constructor Summary

Constructors

Constructor	Description
OnLineStrategy(double yOffset)	Create a new strategy that places the text on the line.

Method Summary

Modifier and Type	Method	Description
private static java.util.List<OnLineStrategy.OffsetGlyph>	computeOffsetGlyphs(java.util.List<java.awt.font.GlyphVector> gvs, double startOffset, boolean rotateText)	Create a list of glyphs with an offset along the way
private static double	computeQuality(MapViewState.MapViewPoint p1, MapViewState.MapViewPoint p2)
boolean	equals(java.lang.Object obj)
MapViewPositionAndRotation	findLabelPlacement(MapViewPath path, java.awt.geom.Rectangle2D nb)	Finds the correct position of a label / icon inside the area.
private static java.util.Optional<OnLineStrategy.HalfSegment>	findOptimalWayPosition(java.awt.geom.Rectangle2D rect, MapViewPath path)
java.util.List<java.awt.font.GlyphVector>	generateGlyphVectors(MapViewPath path, java.awt.geom.Rectangle2D nb, java.util.List<java.awt.font.GlyphVector> gvs, boolean isDoubleTranslationBug)	Generates the transformed glyph vectors for the given text.
int	hashCode()
boolean	supportsGlyphVector()	Checks whether this placement strategy supports more detailed (rotation / ...) placement using a glyph vector.
private static double	theta(MapViewState.MapViewPoint start, MapViewState.MapViewPoint end)
java.lang.String	toString()
private static double	upsideTheta(OnLineStrategy.HalfSegment best)
PositionForAreaStrategy	withAddedOffset(java.awt.geom.Point2D addToOffset)	Create a new instance of the same strategy adding a offset

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

INSTANCE

public static final OnLineStrategy INSTANCE

An instance of this class.

yOffset

private final double yOffset

Constructor Detail

OnLineStrategy

public OnLineStrategy(double yOffset)

Create a new strategy that places the text on the line.

Parameters:

yOffset - The offset sidewards to the line.

Method Detail

findLabelPlacement

public MapViewPositionAndRotation findLabelPlacement(MapViewPath path,
                                                     java.awt.geom.Rectangle2D nb)

Description copied from interface: PositionForAreaStrategy

Finds the correct position of a label / icon inside the area.

Specified by:

findLabelPlacement in interface PositionForAreaStrategy

Parameters:

path - The area to search in

nb - The bounding box of the thing we are searching a place for.

Returns:

The position as rectangle with the same dimension as nb. null if none was found.

upsideTheta

private static double upsideTheta(OnLineStrategy.HalfSegment best)

supportsGlyphVector

public boolean supportsGlyphVector()

Description copied from interface: PositionForAreaStrategy

Checks whether this placement strategy supports more detailed (rotation / ...) placement using a glyph vector.

Specified by:

supportsGlyphVector in interface PositionForAreaStrategy

Returns:

true if it is supported.

generateGlyphVectors

public java.util.List<java.awt.font.GlyphVector> generateGlyphVectors(MapViewPath path,
                                                                      java.awt.geom.Rectangle2D nb,
                                                                      java.util.List<java.awt.font.GlyphVector> gvs,
                                                                      boolean isDoubleTranslationBug)

Description copied from interface: PositionForAreaStrategy

Generates the transformed glyph vectors for the given text.

Specified by:

generateGlyphVectors in interface PositionForAreaStrategy

Parameters:

path - The path to place the text along

nb - The bounds of the text

gvs - The glyph vectors for the text. May be modified

isDoubleTranslationBug - true to fix a glyph placement bug.

Returns:

The glyph vectors.

computeOffsetGlyphs

private static java.util.List<OnLineStrategy.OffsetGlyph> computeOffsetGlyphs(java.util.List<java.awt.font.GlyphVector> gvs,
                                                                              double startOffset,
                                                                              boolean rotateText)

Create a list of glyphs with an offset along the way

Parameters:

gvs - The list of glyphs

startOffset - The offset in the line

rotateText - Rotate the text by 180°

Returns:

The list of glyphs.

findOptimalWayPosition

private static java.util.Optional<OnLineStrategy.HalfSegment> findOptimalWayPosition(java.awt.geom.Rectangle2D rect,
                                                                                     MapViewPath path)

computeQuality

private static double computeQuality(MapViewState.MapViewPoint p1,
                                     MapViewState.MapViewPoint p2)

theta

private static double theta(MapViewState.MapViewPoint start,
                            MapViewState.MapViewPoint end)

withAddedOffset

public PositionForAreaStrategy withAddedOffset(java.awt.geom.Point2D addToOffset)

Description copied from interface: PositionForAreaStrategy

Create a new instance of the same strategy adding a offset

Specified by:

withAddedOffset in interface PositionForAreaStrategy

Parameters:

addToOffset - The offset to add

Returns:

The new strategy

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object