def getWidgetFromParameter(self, param):
     if isinstance(param, ParameterRaster):
         item = QComboBox()
         layers = self.getAvailableValuesOfType(ParameterRaster,
                                                OutputRaster)
         if param.optional:
             item.addItem(self.NOT_SELECTED, None)
         for layer in layers:
             item.addItem(self.resolveValueDescription(layer), layer)
     elif isinstance(param, ParameterVector):
         item = QComboBox()
         layers = self.getAvailableValuesOfType(ParameterVector,
                                                OutputVector)
         if param.optional:
             item.addItem(self.NOT_SELECTED, None)
         for layer in layers:
             item.addItem(self.resolveValueDescription(layer), layer)
     elif isinstance(param, ParameterTable):
         item = QComboBox()
         tables = self.getAvailableValuesOfType(ParameterTable, OutputTable)
         layers = self.getAvailableValuesOfType(ParameterVector,
                                                OutputVector)
         if param.optional:
             item.addItem(self.NOT_SELECTED, None)
         for table in tables:
             item.addItem(self.resolveValueDescription(table), table)
         for layer in layers:
             item.addItem(self.resolveValueDescription(layer), layer)
     elif isinstance(param, ParameterBoolean):
         item = QComboBox()
         item.addItem('Yes')
         item.addItem('No')
         bools = self.getAvailableValuesOfType(ParameterBoolean, None)
         for b in bools:
             item.addItem(self.resolveValueDescription(b), b)
         if param.default:
             item.setCurrentIndex(0)
         else:
             item.setCurrentIndex(1)
     elif isinstance(param, ParameterSelection):
         item = QComboBox()
         item.addItems(param.options)
         item.setCurrentIndex(param.default or 1)
     elif isinstance(param, ParameterFixedTable):
         item = FixedTablePanel(param)
     elif isinstance(param, ParameterRange):
         item = RangePanel(param)
     elif isinstance(param, ParameterMultipleInput):
         if param.datatype == ParameterMultipleInput.TYPE_VECTOR_ANY:
             options = self.getAvailableValuesOfType(
                 ParameterVector, OutputVector)
         else:
             options = self.getAvailableValuesOfType(
                 ParameterRaster, OutputRaster)
         opts = []
         for opt in options:
             opts.append(self.resolveValueDescription(opt))
         item = MultipleInputPanel(opts)
     elif isinstance(param, ParameterString):
         strings = self.getAvailableValuesOfType(ParameterString,
                                                 OutputString)
         options = [(self.resolveValueDescription(s), s) for s in strings]
         if param.multiline:
             item = MultilineTextPanel(options)
             item.setText(unicode(param.default or ""))
         else:
             item = QComboBox()
             item.setEditable(True)
             for desc, val in options:
                 item.addItem(desc, val)
             item.setEditText(unicode(param.default or ""))
     elif isinstance(param, ParameterTableField):
         item = QComboBox()
         item.setEditable(True)
         fields = self.getAvailableValuesOfType(ParameterTableField, None)
         for f in fields:
             item.addItem(self.resolveValueDescription(f), f)
     elif isinstance(param, ParameterNumber):
         item = QComboBox()
         item.setEditable(True)
         numbers = self.getAvailableValuesOfType(ParameterNumber,
                                                 OutputNumber)
         for n in numbers:
             item.addItem(self.resolveValueDescription(n), n)
         item.setEditText(unicode(param.default))
     elif isinstance(param, ParameterCrs):
         item = CrsSelectionPanel(param.default)
     elif isinstance(param, ParameterExtent):
         item = QComboBox()
         item.setEditable(True)
         extents = self.getAvailableValuesOfType(ParameterExtent,
                                                 OutputExtent)
         if self.canUseAutoExtent():
             item.addItem(self.USE_MIN_COVERING_EXTENT, None)
         for ex in extents:
             item.addItem(self.resolveValueDescription(ex), ex)
         if not self.canUseAutoExtent():
             item.setEditText(unicode(param.default))
     elif isinstance(param, ParameterPoint):
         item = QComboBox()
         item.setEditable(True)
         points = self.getAvailableValuesOfType(ParameterPoint)
         for p in points:
             item.addItem(self.resolveValueDescription(p), p)
         item.setEditText(unicode(param.default))
     elif isinstance(param, ParameterFile):
         item = QComboBox()
         item.setEditable(True)
         files = self.getAvailableValuesOfType(ParameterFile, OutputFile)
         for f in files:
             item.addItem(self.resolveValueDescription(f), f)
     elif isinstance(param, ParameterGeometryPredicate):
         item = GeometryPredicateSelectionPanel(param.enabledPredicates)
     else:
         item = QLineEdit()
         try:
             item.setText(unicode(param.default))
         except:
             pass
     return item
 def getWidgetFromParameter(self, param):
     if isinstance(param, ParameterRaster):
         item = QComboBox()
         layers = self.getAvailableValuesOfType(ParameterRaster, OutputRaster)
         if param.optional:
             item.addItem(self.NOT_SELECTED, None)
         for layer in layers:
             item.addItem(self.resolveValueDescription(layer), layer)
     elif isinstance(param, ParameterVector):
         item = QComboBox()
         layers = self.getAvailableValuesOfType(ParameterVector, OutputVector)
         if param.optional:
             item.addItem(self.NOT_SELECTED, None)
         for layer in layers:
             item.addItem(self.resolveValueDescription(layer), layer)
     elif isinstance(param, ParameterTable):
         item = QComboBox()
         tables = self.getAvailableValuesOfType(ParameterTable, OutputTable)
         layers = self.getAvailableValuesOfType(ParameterVector, OutputVector)
         if param.optional:
             item.addItem(self.NOT_SELECTED, None)
         for table in tables:
             item.addItem(self.resolveValueDescription(table), table)
         for layer in layers:
             item.addItem(self.resolveValueDescription(layer), layer)
     elif isinstance(param, ParameterBoolean):
         item = QComboBox()
         item.addItem('Yes')
         item.addItem('No')
         bools = self.getAvailableValuesOfType(ParameterBoolean, None)
         for b in bools:
             item.addItem(self.resolveValueDescription(b), b)
         if param.default:
             item.setCurrentIndex(0)
         else:
             item.setCurrentIndex(1)
     elif isinstance(param, ParameterSelection):
         item = QComboBox()
         item.addItems(param.options)
         item.setCurrentIndex(param.default or 1)
     elif isinstance(param, ParameterFixedTable):
         item = FixedTablePanel(param)
     elif isinstance(param, ParameterRange):
         item = RangePanel(param)
     elif isinstance(param, ParameterMultipleInput):
         if param.datatype == ParameterMultipleInput.TYPE_VECTOR_ANY:
             options = self.getAvailableValuesOfType(ParameterVector, OutputVector)
         else:
             options = self.getAvailableValuesOfType(ParameterRaster, OutputRaster)
         opts = []
         for opt in options:
             opts.append(self.resolveValueDescription(opt))
         item = MultipleInputPanel(opts)
     elif isinstance(param, ParameterString):
         strings = self.getAvailableValuesOfType(ParameterString, OutputString)
         options = [(self.resolveValueDescription(s), s) for s in strings]
         if param.multiline:
             item = MultilineTextPanel(options)
             item.setText(unicode(param.default or ""))
         else:
             item = QComboBox()
             item.setEditable(True)
             for desc, val in options:
                 item.addItem(desc, val)
             item.setEditText(unicode(param.default or ""))
     elif isinstance(param, ParameterTableField):
         item = QComboBox()
         item.setEditable(True)
         fields = self.getAvailableValuesOfType(ParameterTableField, None)
         for f in fields:
             item.addItem(self.resolveValueDescription(f), f)
     elif isinstance(param, ParameterNumber):
         item = QComboBox()
         item.setEditable(True)
         numbers = self.getAvailableValuesOfType(ParameterNumber, OutputNumber)
         for n in numbers:
             item.addItem(self.resolveValueDescription(n), n)
         item.setEditText(unicode(param.default))
     elif isinstance(param, ParameterCrs):
         item = CrsSelectionPanel(param.default)
     elif isinstance(param, ParameterExtent):
         item = QComboBox()
         item.setEditable(True)
         extents = self.getAvailableValuesOfType(ParameterExtent, OutputExtent)
         if self.canUseAutoExtent():
             item.addItem(self.USE_MIN_COVERING_EXTENT, None)
         for ex in extents:
             item.addItem(self.resolveValueDescription(ex), ex)
         if not self.canUseAutoExtent():
             item.setEditText(unicode(param.default))
     elif isinstance(param, ParameterPoint):
         item = QComboBox()
         item.setEditable(True)
         points = self.getAvailableValuesOfType(ParameterPoint)
         for p in points:
             item.addItem(self.resolveValueDescription(p), p)
         item.setEditText(unicode(param.default))
     elif isinstance(param, ParameterFile):
         item = QComboBox()
         item.setEditable(True)
         files = self.getAvailableValuesOfType(ParameterFile, OutputFile)
         for f in files:
             item.addItem(self.resolveValueDescription(f), f)
     elif isinstance(param, ParameterGeometryPredicate):
         item = GeometryPredicateSelectionPanel(param.enabledPredicates)
     else:
         item = QLineEdit()
         try:
             item.setText(unicode(param.default))
         except:
             pass
     return item