Advanced labeling strategy #gvsig #scripting

advanced_labeling_strategy_gvsig_layer.py

# encoding: utf-8

import gvsig
gvsig.uselib.use_plugin("org.gvsig.labeling.app.mainplugin")
from gvsig import geom
from org.gvsig.labeling.label import GeneralLabelingFactory
from org.gvsig.fmap.mapcontext.rendering.legend.styling import IPlacementConstraints
from org.gvsig.symbology.fmap.mapcontext.rendering.legend.styling import LabelClassFactory
from org.gvsig.symbology import SymbologyLocator
from java.awt import Color

def main(*args):
    # Creating new layer
    ft = gvsig.createSchema()
    ft.append("ID", "INTEGER")
    ft.append("GEOMETRY", "GEOMETRY")
    ft.get('GEOMETRY').setGeometryType(geom.POINT,geom.D2)
  
    layer = gvsig.createShape(ft, prefixname="testSymbol")
    store = layer.getFeatureStore()
    layer.edit()
    layer.append({"ID":1,"GEOMETRY":geom.createPoint(geom.D2, 10, 20)})
    layer.append({"ID":2,"GEOMETRY":geom.createPoint(geom.D2, 20, 20)})
    layer.append({"ID":3,"GEOMETRY":geom.createPoint(geom.D2, 20, 30)})
    layer.commit()
    gvsig.currentView().addLayer(layer)
  
    # Change to ADVANCED LABELING STRATEGY
    layer.setIsLabeled(True)
    
    symManager = SymbologyLocator.getSymbologyManager()

    glf = GeneralLabelingFactory()
    gls = glf.createStrategy(layer, None, None, None)
    
    placementc = gls.getPlacementConstraints()
    placementc.setPlacementMode(IPlacementConstraints.ON_TOP_OF_THE_POINT)

    defaultLabel = symManager.createDefaultLabel()
    # Puedes agregar las diferentes etiquetas que responde a una expresion
    # En esta caso dos etiquetas que se repiten
    defaultLabel.setLabelExpressions(["ID", "ID"])
    textSymbol = symManager.createSimpleTextSymbol()
    textSymbol.setDrawWithHalo(True)
    textSymbol.setHaloColor(Color.GREEN)
    textSymbol.setHaloWidth(2)
    defaultLabel.setTextSymbol(textSymbol)
    resp = gls.getLabelingMethod() #ILabelingMethod
    resp.addLabelClass(defaultLabel)
    gls.setLabelingMethod(resp)
    layer.setLabelingStrategy(gls)