mirror of
https://github.com/qgis/QGIS.git
synced 2025-02-27 00:33:48 -05:00
112 lines
4.4 KiB
Python
112 lines
4.4 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
AlgorithmProvider.py
|
|
---------------------
|
|
Date : August 2012
|
|
Copyright : (C) 2012 by Victor Olaya
|
|
Email : volayaf at gmail dot com
|
|
***************************************************************************
|
|
* *
|
|
* This program is free software; you can redistribute it and/or modify *
|
|
* it under the terms of the GNU General Public License as published by *
|
|
* the Free Software Foundation; either version 2 of the License, or *
|
|
* (at your option) any later version. *
|
|
* *
|
|
***************************************************************************
|
|
"""
|
|
|
|
__author__ = 'Victor Olaya'
|
|
__date__ = 'August 2012'
|
|
__copyright__ = '(C) 2012, Victor Olaya'
|
|
# This will get replaced with a git SHA1 when you do a git archive
|
|
__revision__ = '$Format:%H$'
|
|
|
|
from sextante.core.SextanteConfig import Setting, SextanteConfig
|
|
import os
|
|
from PyQt4 import QtGui
|
|
from qgis.core import *
|
|
|
|
class AlgorithmProvider():
|
|
'''this is the base class for algorithms providers.
|
|
An algorithm provider is a set of related algorithms, typically from the same
|
|
external application or related to a common area of analysis.
|
|
'''
|
|
|
|
def __init__(self):
|
|
#indicates if the provider should be active by default.
|
|
#For provider relying on an external software, this should be
|
|
#false, so the user should activate them manually and install
|
|
#the required software in advance.
|
|
self.activate = True
|
|
self.actions = []
|
|
self.contextMenuActions = []
|
|
|
|
|
|
def loadAlgorithms(self):
|
|
self.algs = []
|
|
name = "ACTIVATE_" + self.getName().upper().replace(" ", "_")
|
|
if not SextanteConfig.getSetting(name):
|
|
return
|
|
else:
|
|
self._loadAlgorithms()
|
|
for alg in self.algs:
|
|
alg.provider = self
|
|
|
|
#methods to be overridden.
|
|
#==============================
|
|
|
|
def _loadAlgorithms(self):
|
|
'''Algorithm loading should take place here, filling self.algs, which is a list of
|
|
elements of class GeoAlgorithm. Use that class to create your own algorithms'''
|
|
pass
|
|
|
|
def initializeSettings(self):
|
|
'''this is the place where you should add config parameters to SEXTANTE using the SextanteConfig class.
|
|
this method is called when a provider is added to SEXTANTE.
|
|
By default it just adds a setting to activate or deactivate algorithms from the provider'''
|
|
SextanteConfig.settingIcons[self.getDescription()] = self.getIcon()
|
|
name = "ACTIVATE_" + self.getName().upper().replace(" ", "_")
|
|
SextanteConfig.addSetting(Setting(self.getDescription(), name, "Activate", self.activate))
|
|
|
|
def unload(self):
|
|
'''Do here anything that you want to be done when the provider is removed from the list of available ones.
|
|
This method is called when you remove the provider from Sextante.
|
|
Removal of config setting should be done here'''
|
|
name = "ACTIVATE_" + self.getName().upper().replace(" ", "_")
|
|
SextanteConfig.removeSetting(name)
|
|
|
|
def getName(self):
|
|
'''Returns the name to use to create the command-line name. Should be a short descriptive name of the provider'''
|
|
return "sextante"
|
|
|
|
def getDescription(self):
|
|
'''Returns the full name of the provider'''
|
|
return "Generic algorithm provider"
|
|
|
|
|
|
def getIcon(self):
|
|
return QtGui.QIcon(os.path.dirname(__file__) + "/../images/alg.png")
|
|
|
|
def getSupportedOutputRasterLayerExtensions(self):
|
|
return ["tif"]
|
|
|
|
def getSupportedOutputVectorLayerExtensions(self):
|
|
formats = QgsVectorFileWriter.supportedFiltersAndFormats()
|
|
extensions = ["shp"]#shp is the default, should be the first
|
|
for extension in formats.keys():
|
|
extension = unicode(extension)
|
|
extension = extension[extension.find('*.') + 2:]
|
|
extension = extension[:extension.find(" ")]
|
|
if extension.lower() != "shp":
|
|
extensions.append(extension)
|
|
return extensions
|
|
#return ["shp"]
|
|
|
|
def getSupportedOutputTableExtensions(self):
|
|
return ["dbf"]
|
|
|
|
def supportsNonFileBasedOutput(self):
|
|
return False
|