Application: gvSIG desktop » gvSIG scripting

from gvsig import *

from commonsdialog import *

"""

Para probar este ejemplo cargue la capa MANZANAS_POB de la carpeta

data y seleccionela en el TOC

"""

execfile( script.getResource("libs/import_utils.py").getAbsolutePath() )

from org.gvsig.fmap.mapcontext.events.listeners import ViewPortListener

import_from_module("libs.formpanel","ProgressBarWithTaskStatus,FormPanel")

class MonitorSuma(ViewPortListener,FormPanel):

  def __init__(self, mapContext, layer, label, fieldname):

    FormPanel.__init__(self,script.getResource("monitor_suma3.xml"))

    self.mapContext = mapContext

    self.layer = layer

    self.fieldname = fieldname

    self.lblEtiqueta.setText(label)

    self.calcular_sumatorio()

    mapContext.getViewPort().addViewPortListener(self)

  def btnCerrar_click(self,*args):

    self.mapContext.getViewPort().removeViewPortListener(self)

    self.hide()

  def backColorChanged(self,*args):

    pass

  def extentChanged(self,*args):

    self.calcular_sumatorio()

  def projectionChanged(self,*args):

    pass

  def calcular_sumatorio(self):

    encuadre = self.mapContext.getViewPort().getEnvelope().getGeometry()

    lineas = self.layer.getFeatureStore().getFeatureSet().iterator()

    suma = 0

    for linea in lineas:

      g = linea.getDefaultGeometry()

      if encuadre.intersects(g) :

        suma += int(linea.get(self.fieldname))

    self.txtSuma.setText(str(suma))

def main(*args):

  if currentView() == None:

    msgbox("Debera tener una vista abierta y activa")

    return

  mapContext = currentView().getMapContext()

  layer = currentLayer()

  if layer == None:

    msgbox("Debera tener seleccionada la capa sobre la que desea trabajar")

    return

  fieldname = inputbox(

    "Introduzca el nombre del campo para calcular el sumatorio",

    "Nombre de campo",

    QUESTION,

    "pob_total"

  )

  if fieldname in ("",None):

    msgbox("Operacion cancelada")

    return

  label = inputbox("Introduzca una etiqueta para el sumatorio de '%s':" % fieldname,

    "Etiqueta",

    QUESTION,

    fieldname

  )

  monitor = MonitorSuma(mapContext, layer, label, fieldname)

  monitor.showTool("monitor")