LabelCacheDefault - modifiable MIN_GOODNESS_FIT
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Key: GEOT-2796
URL:
http://jira.codehaus.org/browse/GEOT-2796 Project: GeoTools
Issue Type: Improvement
Components: core render
Affects Versions: 2.5.8
Reporter: Kang Mann Ern
Assignee: Andrea Aime
Priority: Minor
LabelCacheDefault filters out labels based on goodness of fit by comparing against a predefined constant MIN_GOODNESS_FIT. This prevents some labels from showing, especially long labels with small geometry. It would be helpful if the MIN_GOODNESS_FIT value could be changed to a variable which is modifiable via TextSymbolizer options. For now, LabelCacheImpl can be used instead, as it allows configuration of the goodness of fit threshold via the "goodnessOfFit" option using TextSymbolizer:
TextSymbolizer textSym;
....
textSym.addToOptions("goodnessOfFit", some_double_value);
How to switch to LabelCacheImpl using StreamingRenderer:
For my own application, I am using StreamingRenderer which defaults to LabelCacheDefault as the LabelCache. To switch to LabelCacheImpl, pass in a renderer hint:
renderer = new StreamingRenderer();
Map hints = new HashMap();
hints.put(StreamingRenderer.LABEL_CACHE_KEY, new LabelCacheImpl());
renderer.setRendererHints(hints);
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