org.geotools.styling.visitor
Class RescaleStyleVisitor

Object
  DuplicatingStyleVisitor
      RescaleStyleVisitor

All Implemented Interfaces:

StyleVisitor

Direct Known Subclasses:

DpiRescaleStyleVisitor

public class RescaleStyleVisitor
extends DuplicatingStyleVisitor

This is a style visitor that will produce a copy of the provided style rescaled by a provided factor.

The provided scale will be use to modify all line widths, font sizes and so forth. We may need to go the extra distance and play with the min/max scale on rules, and if there is any DPI specific madness going on we are going to cry.

According to the specification we are supposed to use environmental variables to make our styles render in a resolution independent manner. The current GeoTools environment variable visitor only does processing for mapscale but does not have a dpi substitution. On the plus side this visitor accepts a general Expression and you are free to use an environmental variable expression in order to make sure a normal base style is tweaked in all the right spots.

Author:

Jody Garnett (Refractions Research)

Field Summary

Fields inherited from class DuplicatingStyleVisitor

copyFilter, ff, pages, sf, STRICT

Constructor Summary

RescaleStyleVisitor(double scale)

RescaleStyleVisitor(Expression scale)

RescaleStyleVisitor(FilterFactory2 filterFactory, double scale)

RescaleStyleVisitor(FilterFactory2 filterFactory, Expression scale)

Method Summary

protected Expression	rescale(Expression expr) Used to rescale the provided expr.
protected void	rescaleArrayOption(Map<String,String> options, String key, int defaultValue) Rescales the specified vendor option
protected void	rescaleOption(Map<String,String> options, String key, double defaultValue) Rescales the specified vendor option
protected void	rescaleOption(Map<String,String> options, String key, int defaultValue) Rescales the specified vendor option
void	visit(Graphic gr) Make graphics (such as used with PointSymbolizer) bigger
void	visit(Stroke stroke) Increase stroke width.
void	visit(TextSymbolizer text) Called when accept is called on a textsymbolizer

Methods inherited from class DuplicatingStyleVisitor

copy, copy, copy, copy, copy, copy, copy, copy, copy, copy, copy, copy, copy, copy, copy, copy, copy, copy, copy, copy, copy, copy, copy, copy, copy, copy, copy, copy, getCopy, setStrict, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RescaleStyleVisitor

public RescaleStyleVisitor(double scale)

RescaleStyleVisitor

public RescaleStyleVisitor(Expression scale)

RescaleStyleVisitor

public RescaleStyleVisitor(FilterFactory2 filterFactory,
                           double scale)

RescaleStyleVisitor

public RescaleStyleVisitor(FilterFactory2 filterFactory,
                           Expression scale)

Method Detail

rescale

protected Expression rescale(Expression expr)

Used to rescale the provided expr.

We do optimize the case where the provided expression is a literal; no sense doing a calculation each time if we don't have to.

Parameters:

expr -

Returns:

expr multiplied by the provided scale

visit

public void visit(Stroke stroke)

Increase stroke width.

Based on feedback we may need to change the dash array as well.

Specified by:

visit in interface StyleVisitor

Overrides:

visit in class DuplicatingStyleVisitor

Parameters:

stroke - the stroke to visit

visit

public void visit(Graphic gr)

Make graphics (such as used with PointSymbolizer) bigger

Specified by:

visit in interface StyleVisitor

Overrides:

visit in class DuplicatingStyleVisitor

Parameters:

gr - the graphic to visit

visit

public void visit(TextSymbolizer text)

Description copied from interface: StyleVisitor

Called when accept is called on a textsymbolizer

Specified by:

visit in interface StyleVisitor

Overrides:

visit in class DuplicatingStyleVisitor

Parameters:

text - the text symbolizer to visit

rescaleOption

protected void rescaleOption(Map<String,String> options,
                             String key,
                             double defaultValue)

Rescales the specified vendor option

Parameters:

options -

key -

defaultAutoWrap -

value -

rescaleOption

protected void rescaleOption(Map<String,String> options,
                             String key,
                             int defaultValue)

Rescales the specified vendor option

Parameters:

options -

key -

defaultAutoWrap -

value -

rescaleArrayOption

protected void rescaleArrayOption(Map<String,String> options,
                                  String key,
                                  int defaultValue)

Rescales the specified vendor option

Parameters:

options -

key -

defaultAutoWrap -

value -