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fdtm_utils.py
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fdtm_utils.py
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# -*- coding: utf-8 -*-
"""
/***************************************************************************
fdtm_plugin
A QGIS plugin
testing hwbs
-------------------
begin : 2017-05-11
git sha : $Format:%H$
copyright : (C) 2017 by arma informatica snc
email : info@armainformatica.it
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
"""
import os
import json
import uuid
import tempfile
import re
from qgis.core import QGis, QgsVectorFileWriter, QgsVectorLayer, QgsFields, QgsField, QgsMapLayerRegistry, QgsCoordinateReferenceSystem, QgsRasterFileWriter, QgsVectorFileWriter, QgsRasterPipe
from qgis.gui import QgsProjectionSelectionWidget
from PyQt4.QtGui import QDoubleValidator, QFileDialog
from PyQt4.QtCore import pyqtSignal
from fdtm_definitions import EAp_FIELDS_TEMPLATE, EPp_FIELDS_TEMPLATE, EPl_FIELDS_TEMPLATE, WR_FIELDS_TEMPLATE, WDS_FIELDS_TEMPLATE, DSV_FIELDS_TEMPLATE
def getFieldFromDefinition(field_type):
type_pack = field_type[1].split("|")
if field_type[2]:
comment = field_type[2]
else:
comment = field_type[0]
return QgsField(name=field_type[0], type=int(type_pack[0]), len=int(type_pack[1]), prec=int(type_pack[2]), comment=comment)
def exclude_checkForTemplateFields(layer):
return
def checkForTemplateFields(layer):
layerFileName = os.path.splitext(os.path.basename(layer.source()))[0]
if re.search('(-(\d)+)$', layerFileName):
idx = -2
else:
idx = -1
templateName = layerFileName.split('-')[idx].replace('_','')
layerTemplate = globals()[templateName+'_FIELDS_TEMPLATE']
layerFieldNamesList = []
for field in layer.fields().toList():
layerFieldNamesList.append(field.name())
for fieldDef in layerTemplate:
if not fieldDef[0] in layerFieldNamesList:
#print "Creating",fieldDef
layer.startEditing()
layer.addAttribute(getFieldFromDefinition(fieldDef))
layer.commitChanges()
def create_shplayer_from_template(template,legend=True):
#print "creating",template['datasource']
fieldSet = QgsFields()
for fieldDef in template['fields']:
fieldSet.append(getFieldFromDefinition(fieldDef))
writer = QgsVectorFileWriter(template['datasource'], 'UTF-8', fieldSet, template['geomtype'], QgsCoordinateReferenceSystem(template['srs']))
if writer.hasError():
print writer.errorMessage()
del writer
lyr = QgsVectorLayer(template['datasource'],template['name'],'ogr')
if template['style']:
lyr.loadNamedStyle(template['style'])
if legend:
QgsMapLayerRegistry.instance().addMapLayer(lyr)
return lyr
def getNextVersionNumber(fileName):
if os.path.exists(fileName):
basePathName, extension = os.path.splitext(fileName)
if re.search( '(-(\d)+)$',basePathName):
version = int(basePathName.split('-')[-1]) + 1
else:
basePathName += '-0'
version = 0
nextFileName= ""
for comps in basePathName.split('-')[:-1]:
nextFileName += comps +'-'
nextFileName += str(version)+extension
return getNextVersionNumber(nextFileName)
return fileName
def create_EAp_layer(ds_dir,srs,legend=True,project=''):
if project:
project += '-'
tmpl = {
'datasource': getNextVersionNumber(os.path.join(ds_dir, project+'EA_p.shp')),
'name': 'EA polygons',
'geomtype': QGis.WKBPolygon,
'srs': srs,
'style': os.path.join(os.path.dirname(__file__), 'res', 'EA_p.qml'),
'fields': EAp_FIELDS_TEMPLATE
}
return create_shplayer_from_template(tmpl,legend=legend)
def create_EPp_layer(ds_dir,srs,legend=True,project=''):
if project:
project += '-'
tmpl = {
'datasource': getNextVersionNumber(os.path.join(ds_dir, project+'EP_p.shp')),
'name': 'EP polygons',
'geomtype': QGis.WKBPolygon,
'srs': srs,
'style': os.path.join(os.path.dirname(__file__), 'res', 'EP_p.qml'),
'fields': EPp_FIELDS_TEMPLATE
}
return create_shplayer_from_template(tmpl,legend=legend)
def create_EPl_layer(ds_dir,srs,legend=True,project=''):
if project:
project += '-'
tmpl = {
'datasource': getNextVersionNumber(os.path.join(ds_dir, project+'EP_l.shp')),
'name': 'EP lines',
'geomtype': QGis.WKBLineString,
'srs': srs,
'style': os.path.join(os.path.dirname(__file__), 'res', 'EP_l.qml'),
'fields': EPl_FIELDS_TEMPLATE
}
return create_shplayer_from_template(tmpl,legend=legend)
def create_WR_layer(ds_dir,srs,legend=True,project=''):
if project:
project += '-'
tmpl = {
'datasource': getNextVersionNumber(os.path.join(ds_dir, project+'WR.shp')),
'name': 'WR polygons',
'geomtype': QGis.WKBPolygon,
'srs': srs,
'style': os.path.join(os.path.dirname(__file__), 'res', 'WR.qml'),
'fields': WR_FIELDS_TEMPLATE
}
return create_shplayer_from_template(tmpl,legend=legend)
def create_WDS_layer(ds_dir,srs,legend=True,project=''):
if project:
project += '-'
tmpl = {
'datasource': getNextVersionNumber(os.path.join(ds_dir, project+'WDS.shp')),
'name': 'WDS lines',
'geomtype': QGis.WKBLineString,
'srs': srs,
'style': os.path.join(os.path.dirname(__file__), 'res', 'WDS.qml'),
'fields': WDS_FIELDS_TEMPLATE
}
return create_shplayer_from_template(tmpl,legend=legend)
def create_DSV_layer(ds_dir,srs,legend=True,project=''):
if project:
project += '-'
tmpl = {
'datasource': getNextVersionNumber(os.path.join(ds_dir, project+'DSV.shp')),
'name': 'DSV points',
'geomtype': QGis.WKBPoint,
'srs': srs,
'style': os.path.join(os.path.dirname(__file__), 'res', 'DSV.qml'),
'fields': DSV_FIELDS_TEMPLATE
}
return create_shplayer_from_template(tmpl,legend=legend)
def tempLayerFromPolygon(polygon,crs, properties={}):
clipFile = os.path.join(tempfile.gettempdir(), '__' + str(uuid.uuid4()) + ".geojson")
geojson_tmpl = '{"type":"FeatureCollection","crs":{"type":"name","properties":{"name":"urn:ogc:def:crs:%s"}},"features":[{"type":"Feature","properties":%s,"geometry":%s}]}'
with open(clipFile, 'w') as geojson_file:
geojson_file.write(geojson_tmpl % (crs.authid(), json.dumps(properties), polygon.exportToGeoJSON()))
tempLayer = QgsVectorLayer(clipFile, 'clip', 'ogr')
tempLayer.setCrs(crs)
return tempLayer
def writeTIFF(layer,path):
wrtr = QgsRasterFileWriter(path)
provider = layer.dataProvider()
pipe = QgsRasterPipe()
pipe.set(provider.clone())
res = wrtr.writeRaster (
pipe,
layer.width(),
layer.height(),
layer.extent(),
layer.crs(),
)
if res != QgsRasterFileWriter.NoError:
print "Error writing layer %s: %s" % (layer.name(), res)
return ''
else:
return path
def writeSHP(layer,path):
res = QgsVectorFileWriter.writeAsVectorFormat(
layer,
path,
'UTF-8',
layer.crs(),
)
if res != QgsVectorFileWriter.NoError:
print "Error writing layer %s: %s" % (layer.name(),res)
return ''
else:
return path