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delimitationtoolbox_dock.py
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delimitationtoolbox_dock.py
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# -*- coding: utf-8 -*-
"""
/***************************************************************************
DelimitationToolbox
delimitationtoolbox_dock.py A QGIS plugin
Various tools for electoral delimitation
-------------------
begin : 2014-07-06
git sha : $Format:%H$
copyright : (C) 2014 by Sean Lin
email : seanlinmt 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. *
* *
***************************************************************************/
"""
import csv
import glob
import json
import re
import traceback
from qgis.core import QgsMessageLog, QgsPalLayerSettings, QgsSymbolV2, QgsRendererCategoryV2, \
QgsCategorizedSymbolRendererV2, QgsFeatureRequest, QgsFeature, QgsGeometry, QgsExpression, QgsMapLayerRegistry, \
QgsVectorLayer
from qgis.gui import *
from PyQt4 import uic
from PyQt4.QtCore import Qt, SIGNAL, QObject, pyqtSignal, QThread
from PyQt4.QtGui import QComboBox, QDockWidget, QColor, QFileDialog, QMessageBox, QDialog, QTableWidgetItem, QLineEdit
from configuration import *
import configuration
from helper.qgis_util import extend_qgis_interface, delete_shapefile
from helper.string import parse_float
from helper.ui import extend_qt_list_widget, MessageType, extend_qlabel_setbold, QgisMessageBarProgress
from delimitation import Delimitation, LayerType
from balancer import Balancer
FORM_CLASS, _ = uic.loadUiType(os.path.join(os.path.dirname(__file__), 'ui_delimitationtoolbox_dock.ui'))
CONFIG_FORM_CLASS, _ = uic.loadUiType(os.path.join(os.path.dirname(__file__), 'ui_configuration.ui'))
class DelimitationToolboxDock(QDockWidget, FORM_CLASS):
def __init__(self, iface, parent=None):
"""Constructor."""
super(DelimitationToolboxDock, self).__init__(parent)
# Set up the user interface from Designer.
# After setupUI you can access any designer object by doing
# self.<objectname>, and you can use autoconnect slots - see
# http://qt-project.org/doc/qt-4.8/designer-using-a-ui-file.html
# #widgets-and-dialogs-with-auto-connect
self.setupUi(self)
# load configuration
Configuration().load()
# threads
self.thread = None
self.worker = None
self.progressBar = None
# label layer
self.palyr = QgsPalLayerSettings()
# init the sub dialogs
self.configuration = DelimitationToolboxConfigDialog(self)
self.configuration.saved.connect(self.populate_state_selector)
self.topology = None
self.id_graph = None
self.balancer_old = None
self.balancer_new = None
# extensions
self.list_checks = extend_qt_list_widget(self.list_checks)
self.iface = extend_qgis_interface(iface)
# manual rebalancer
self.balancer_started = False
self.canvas = self.iface.mapCanvas()
self.clickTool = DelimitationMapTool(self.canvas)
self.canvas.setMapTool(self.clickTool)
self.clickTool.canvasDoubleClicked.connect(self.canvas_doubleclicked)
self.clicked_feature_id = None
self.layer_id = None
self.layer = None
self.voters_fieldname = None
self.polling_old_fieldname = None
self.state_old_fieldname = None
self.par_old_fieldname = None
self.state_new_fieldname = None
self.par_new_fieldname = None
self.polling_new_fieldname = None
self.par_new_prefix = None
# set selection colour
colour = QColor(255, 255, 51, 150) # transparent yellow
self.canvas.setSelectionColor(colour)
self.btGenerateKML.setEnabled(False)
# extend labels
extend_qlabel_setbold(self.label_live_state)
extend_qlabel_setbold(self.label_live_par)
QObject.connect(self.btShowTopology, SIGNAL("clicked()"), self.topology_display)
QObject.connect(self.btRenumber, SIGNAL("clicked()"), self.layer_renumber)
QObject.connect(self.btLoadLayer, SIGNAL("clicked()"), self.select_layer)
QObject.connect(self.btRebalance, SIGNAL("clicked()"), self.balancer_start)
QObject.connect(self.btGenerate, SIGNAL("clicked()"), self.generator_start)
QObject.connect(self.btGenerateKML, SIGNAL("clicked()"), self.balancer_generate_start)
QObject.connect(self.BtInputDir, SIGNAL("clicked()"), self.select_input_dir)
QObject.connect(self.btEditConfig, SIGNAL("clicked()"), self.configuration.show)
QObject.connect(self.btDuplicate, SIGNAL("clicked()"), self.fields_duplicate_old)
QObject.connect(self.btRedrawLayer, SIGNAL("clicked()"), self.layer_redraw)
QObject.connect(self.selector_layers, SIGNAL('currentIndexChanged(const QString&)'),
self.layer_changed)
QObject.connect(self.selector_state, SIGNAL('currentIndexChanged(const QString&)'),
self.live_show)
QObject.connect(self.selector_par, SIGNAL('currentIndexChanged(const QString&)'),
self.live_show)
# http://qgis.org/api/classQgsMapCanvas.html
QObject.connect(self.cb_label, SIGNAL("stateChanged(int)"), self.label_handler)
QObject.connect(self.cb_feature_id, SIGNAL("stateChanged(int)"), self.label_handler)
# monitor layer selection change
QObject.connect(self.btClearSelected, SIGNAL("clicked()"), self.selection_clear)
QObject.connect(self.btReset, SIGNAL("clicked()"), self.fields_reset)
QObject.connect(self.btUpdateAttributes, SIGNAL("clicked()"), self.selection_update)
QObject.connect(self.canvas, SIGNAL("layersChanged()"), self.layers_load)
self.setAttribute(Qt.WidgetAttribute(Qt.WA_DeleteOnClose))
# read from qgis settings
self.inputDir.setText(Configuration().read_qt(Configuration.SRC_DIR))
# populate state
self.populate_state_selector()
def messsage_handler(self, message_type, message):
if message_type == MessageType.Fail:
self.list_checks.msg_fail(message)
elif message_type == MessageType.Normal:
self.list_checks.msg_normal(message)
elif message_type == MessageType.OK:
self.list_checks.msg_ok(message)
else:
raise Exception("Unknown message type {}".format(message_type))
def statistics_update(self):
self.label_total_voters.setText(str(self.balancer_old.total_voters))
self.label_par_range_old.setText("{:.2f}%/{:.2f}/{:.2f}%"
.format(self.balancer_old.parmin_actual_precentage,
self.balancer_old.par_average,
self.balancer_old.parmax_actual_precentage))
self.label_state_range_old.setText("{:.2f}%/{:.2f}/{:.2f}%"
.format(self.balancer_old.statemin_actual_precentage,
self.balancer_old.state_average,
self.balancer_old.statemax_actual_precentage))
self.label_par_range_new.setText("{:.2f}%/{:.2f}/{:.2f}%"
.format(self.balancer_new.parmin_actual_precentage,
self.balancer_new.par_average_target,
self.balancer_new.parmax_actual_precentage))
self.label_state_range_new.setText("{:.2f}%/{:.2f}/{:.2f}%"
.format(self.balancer_new.statemin_actual_precentage,
self.balancer_new.state_average_target,
self.balancer_new.statemax_actual_precentage))
def live_show(self):
selectedfeatureids = self.layer.selectedFeaturesIds()
current_state = self.selector_state.itemData(self.selector_state.currentIndex())
current_par = self.selector_par.itemData(self.selector_par.currentIndex())
balancer = self.get_balancer()
totals = balancer.calculate_live_totals(current_par, current_state, selectedfeatureids)
voters_par = totals[0]
voters_state = totals[1]
voters_selected = totals[2]
# number of state seats in current parliament seat
if str(current_par) in balancer.map_par_state:
states_per_par = balancer.map_par_state[str(current_par)]['states'].__len__()
else:
states_per_par = "-"
self.label_state_voters.setText(str(voters_state))
self.label_par_voters.setText("{}({})".format(voters_par, states_per_par))
if balancer.state_average:
delta_state = voters_state - balancer.state_average
delta_state_percentage = 100 * delta_state / balancer.state_average
self.label_delta_state.setText("{:.0f},{:.2f}%".format(delta_state, delta_state_percentage))
self.label_selected_state \
.setText("{:.0f},{:.2f}%"
.format(voters_selected,
100 * voters_selected / balancer.state_average))
if balancer.par_average:
delta_par = voters_par - balancer.par_average
delta_par_percentage = 100 * delta_par / balancer.par_average
self.label_delta_par.setText("{:.0f},{:.2f}%".format(delta_par, delta_par_percentage))
self.label_selected_par \
.setText("{:.0f},{:.2f}%"
.format(voters_selected,
100 * voters_selected / balancer.par_average))
self.statistics_update()
def fields_duplicate_old(self):
confirmation = QMessageBox.question(self,
"Overwrite values",
"Are you sure? Allocation for the new "
"constituencies will be overwritten with the old map.",
QMessageBox.Yes | QMessageBox.No)
if confirmation == QMessageBox.No:
return
delta = self.get_delta()
if not delta:
return
# get all values then sort by PAR and then by STATE which returns a tuple
attributes_old = sorted(self.balancer_old.topology_polling.items(),
key=lambda x: (x[1][self.par_old_fieldname],
x[1][self.state_old_fieldname],
x[1][self.polling_old_fieldname]))
par_format = self.balancer_new.par_prefix_format
state_format = self.balancer_new.state_prefix_format
poll_format = self.balancer_new.polling_prefix_format
regexp = "(\d+)"
base_par = int(re.match(regexp, attributes_old[0][1][self.par_old_fieldname], re.I).group(1))
# http://gis.stackexchange.com/questions/58296/speed-of-editing-attributes-in-qgis-from-a-python-plugin
self.layer.startEditing()
for row in attributes_old:
old_par = int(re.match(regexp, row[1][self.par_old_fieldname], re.I).group(1))
old_state = int(re.match(regexp, row[1][self.state_old_fieldname], re.I).group(1))
old_polling = int(re.match(regexp, row[1][self.polling_old_fieldname], re.I).group(1))
new_par = par_format % (old_par - base_par + 1)
new_state = state_format % old_state
new_polling = poll_format % old_polling
self.balancer_new.update_topology(
{row[0]: {
self.state_new_fieldname: new_state,
self.par_new_fieldname: new_par,
self.polling_new_fieldname: new_polling}})
self.layer.commitChanges()
self.layer_redraw(True)
self.iface.info("Done")
def fields_reset(self):
confirmation = QMessageBox.question(self,
"Reset values",
"""Are you sure? This operation will permanently remove all new allocations.
You will need to rebalance all areas from the beginning.""",
QMessageBox.Yes | QMessageBox.No)
if confirmation == QMessageBox.No:
return
self.layer.startEditing()
for k, v in self.balancer_new.topology_polling.items():
self.layer.changeAttributeValue(k, self.layer.fieldNameIndex(self.polling_new_fieldname), None)
self.layer.changeAttributeValue(k, self.layer.fieldNameIndex(self.state_new_fieldname), None)
self.layer.changeAttributeValue(k, self.layer.fieldNameIndex(self.par_new_fieldname), None)
self.layer.commitChanges()
self.layer_redraw(True)
self.iface.info("Done")
def label_handler(self):
self.label_update()
self.canvas.refresh()
def label_update(self):
self.palyr.readFromLayer(self.layer)
if self.cb_label.isChecked() or self.cb_feature_id.isChecked():
self.palyr.enabled = True
else:
self.palyr.enabled = False
expr = []
balancer = self.get_balancer()
if self.cb_feature_id.isChecked():
expr.append("""CASE
WHEN
{0} IS NULL or {1} IS NULL THEN ''
ELSE concat(toint(regexp_substr({0}, '(\\\d+)')),'/',toint(regexp_substr({1}, '(\\\d+)')))
END""".format(balancer.par_field, balancer.state_field))
if self.cb_label.isChecked():
if self.selector_seat_type.currentIndex() == 1:
divisor = balancer.par_average
elif self.selector_seat_type.currentIndex() == 0:
divisor = balancer.state_average
else:
raise Exception("Unknown seat type")
if expr.__len__():
expr.append("'\\n'")
expr.append("round({}*100.0/{}, 2)".format(self.voters_fieldname, divisor))
self.palyr.fieldName = "concat({})".format(",".join(expr))
self.palyr.isExpression = True
self.palyr.placement = QgsPalLayerSettings.OverPoint
self.palyr.setDataDefinedProperty(QgsPalLayerSettings.Size, True, True, '8', '')
self.palyr.writeToLayer(self.layer)
def combobox_state_save(self):
saved_state = {}
for widget in self.findChildren(QComboBox):
saved_state.update({widget.objectName(): widget.currentIndex()})
for widget in self.findChildren(QLineEdit):
saved_state.update({widget.objectName(): widget.text()})
Configuration().store_qt(Configuration.UI_STATE, json.dumps(saved_state))
def combobox_state_load(self, excludes=None):
if not excludes:
excludes = []
try:
saved_state = json.loads(Configuration().read_qt(Configuration.UI_STATE))
except:
return
for widget in self.findChildren(QComboBox):
if widget.objectName() in saved_state and widget.objectName() not in excludes:
widget.setCurrentIndex(saved_state[widget.objectName()])
for widget in self.findChildren(QLineEdit):
if widget.objectName() in saved_state and widget.objectName() not in excludes:
widget.setText(saved_state[widget.objectName()])
def layer_changed(self):
self.layer = None
layer_id = self.selector_layers.itemData(self.selector_layers.currentIndex())
for layer in self.canvas.layers():
if layer.id() == layer_id:
self.layer = layer
if not self.layer:
self.balancer_stop()
return
# don't do anything if old layer is still there
if self.layer_id == layer_id:
return
self.layer_id = layer_id
self.selector_voters.clear()
self.selector_polling_old.clear()
self.selector_state_old.clear()
self.selector_par_old.clear()
self.selector_state_new.clear()
self.selector_par_new.clear()
self.selector_polling_new.clear()
self.selector_voters.addItem("Select field ...", "")
self.selector_polling_old.addItem("Select area ...", "")
self.selector_state_old.addItem("Select state ...", "")
self.selector_par_old.addItem("Select par ...", "")
self.selector_state_new.addItem("Select state ...", "")
self.selector_par_new.addItem("Select par ...", "")
self.selector_polling_new.addItem("Select area ...", "")
# http://qgis.org/api/classQgsVectorDataProvider.html
fields = self.layer.dataProvider().fields()
for field in fields:
self.selector_voters.addItem(field.name(), field.name())
self.selector_polling_old.addItem(field.name(), field.name())
self.selector_state_old.addItem(field.name(), field.name())
self.selector_par_old.addItem(field.name(), field.name())
self.selector_state_new.addItem(field.name(), field.name())
self.selector_par_new.addItem(field.name(), field.name())
self.selector_polling_new.addItem(field.name(), field.name())
# load save state
self.combobox_state_load(["selector_layers"])
def layers_load(self):
self.selector_layers.clear()
for layer in self.canvas.layers():
if layer.type() == layer.VectorLayer and layer.geometryType() == 2:
self.selector_layers.addItem(layer.name(), layer.id())
def layer_redraw(self, zoom_to_layer=True):
delta = self.get_delta()
if not delta:
return
# init selectors
self.feature_selector_init()
# update label parameters
self.label_update()
# update map redraw parameters
map_type = self.selector_map_type.currentIndex()
if map_type == 0:
balancer = self.balancer_old
else:
# new map, need to reload
balancer = self.balancer_new
balancer.load_topology()
balancer.init_colouring()
seat_type = self.selector_seat_type.currentIndex()
if seat_type == 0:
# state
get_colour_method = balancer.get_colour_by_state
attr_prefix = balancer.state_prefix_format
attr_name = balancer.state_field
colouring = balancer.colouring_state
self.label_live_state.setBold(True)
self.label_live_par.setBold(False)
else:
# par
get_colour_method = balancer.get_colour_by_parliament
attr_prefix = balancer.par_prefix_format
attr_name = balancer.par_field
colouring = balancer.colouring_par
self.label_live_state.setBold(False)
self.label_live_par.setBold(True)
geomtype = self.layer.geometryType()
if self.selector_overlay_type.currentIndex() == 2:
# load adjacency layers
name = self.selector_target_state.currentText()
state_alayer = balancer.adjlayer_make(name, LayerType.State)
par_alayer = balancer.adjlayer_make(name, LayerType.Parliament)
existing_layerids = []
for lyr in [state_alayer, par_alayer]:
existing_layerids.extend(
[x.id() for x in QgsMapLayerRegistry().instance().mapLayersByName(lyr.name()) if x is not None])
QgsMapLayerRegistry().instance().removeMapLayers(existing_layerids)
QgsMapLayerRegistry().instance().addMapLayer(state_alayer)
QgsMapLayerRegistry().instance().addMapLayer(par_alayer)
return
# balancer
categories = []
# add blank category for unallocated features
empty_symbol = QgsSymbolV2.defaultSymbol(geomtype)
empty_symbol.setColor(QColor('white'))
empty_category = QgsRendererCategoryV2("", empty_symbol, "")
categories.append(empty_category)
for k, v in colouring.gColouring.iteritems():
if self.selector_overlay_type.currentIndex() == 1:
colour = get_colour_method(k, v)
elif self.selector_overlay_type.currentIndex() == 0:
colour = colouring.get_colour(v)
else:
self.iface.warning("That analysis option is not available yet")
return
if not colour:
continue
symbol = QgsSymbolV2.defaultSymbol(geomtype)
symbol.setColor(QColor(colour.hex))
val = attr_prefix % int(k)
category = QgsRendererCategoryV2(val, symbol, val)
categories.append(category)
# create the renderer and assign it to a layer
renderer = QgsCategorizedSymbolRendererV2(attr_name, categories)
self.layer.setRendererV2(renderer)
# self.canvas.setDirty(True)
self.canvas.clearCache()
if zoom_to_layer:
self.canvas.setExtent(self.layer.extent())
self.canvas.zoomToNextExtent()
self.canvas.refresh()
def layer_renumber(self):
confirmation = QMessageBox.question(self,
"Reorder allocation",
"Are you sure? This will renumber and " +
"reorganise any constituencies that are out of sequence.",
QMessageBox.Yes | QMessageBox.No)
if confirmation == QMessageBox.No:
return
self.layer.startEditing()
self.balancer_new.resequence(self.par_new_prefix)
par_used = [v[self.par_new_fieldname] for v in self.balancer_new.topology_polling.values()]
state_used = [v[self.state_new_fieldname] for v in self.balancer_new.topology_polling.values()]
if set(par_used).__len__() > self.balancer_old.par_count or \
set(state_used).__len__() > self.balancer_old.state_count:
self.iface.error("Allocation limit exceeded")
self.layer.rollBack()
return
self.layer.commitChanges()
self.iface.info("Renumbering completed.")
def map_type_change(self):
self.feature_selector_init()
self.label_handler()
def canvas_doubleclicked(self, point, button):
current_state = self.selector_state.itemData(self.selector_state.currentIndex())
current_par = self.selector_par.itemData(self.selector_par.currentIndex())
balancer = self.get_balancer()
par_field = balancer.par_field
state_field = balancer.state_field
if current_state and current_par:
ids = [int(k) for k, v in balancer.topology_polling.items()
if v[par_field] == str(current_par) and v[state_field] == str(current_state)]
if set(ids) \
.difference(self.layer.selectedFeaturesIds()) \
.difference([self.clicked_feature_id]) \
.__len__() == 0:
self.layer.modifySelection([], ids)
else:
self.layer.modifySelection(ids, [])
def canvas_clicked(self, point, button):
if self.layer is None:
self.iface.warning("Active layer not found")
return
# self.iface.info("clicked = %s,%s" % (str(point.x()), str(point.y())))
# setup the provider select to filter results based on a rectangle
point = QgsGeometry().fromPoint(point)
# scale-dependent buffer of 2 pixels-worth of map units
buff = point.buffer((self.canvas.mapUnitsPerPixel() * 2), 0)
rect = buff.boundingBox()
rect.normalize()
# set up featureReq
req = QgsFeatureRequest()
req.setFilterRect(rect)
req.setFlags(QgsFeatureRequest.NoGeometry)
fit = self.layer.getFeatures(req)
feats = []
f = QgsFeature()
while fit.nextFeature(f):
feats.append(f)
if feats.__len__() == 0:
return
elif feats.__len__() != 1:
self.iface.warning("{} features clicked".format(feats.__len__()))
changed_feature = feats[0]
self.clicked_feature_id = changed_feature.id()
if button == Qt.RightButton:
# update selectors & recalculate
balancer = self.get_balancer()
self.tab_rebalance.setCurrentIndex(1)
raw_par = changed_feature[balancer.par_field]
if raw_par:
par_val = int(re.search(r'\d+', raw_par).group())
selector_par_index = self.selector_par.findData(par_val)
if selector_par_index != -1:
self.selector_par.setCurrentIndex(selector_par_index)
raw_state = changed_feature[balancer.state_field]
if raw_state:
state_val = int(re.search(r'\d+', raw_state).group())
selector_state_index = self.selector_state.findData(state_val)
if selector_state_index != -1:
self.selector_state.setCurrentIndex(selector_state_index)
self.live_show()
else:
# toggle selection & recalculate
self.layer.invertSelectionInRectangle(rect)
def populate_state_selector(self):
self.selector_target_state.clear()
self.selector_target_state.addItem("Select state ...", "")
map(lambda x: self.selector_target_state.addItem(x[0], x[1] if x.__len__() == 2 else ""),
[entry.split(':') for entry in Configuration().read("Settings", "state_prefixes")])
def selection_update(self):
# don't allow write to old layer
if self.selector_map_type == 0:
self.iface.warning("Not allowed to modify old location codes. Select new map to assign new location codes.")
return
current_state = self.balancer_new.state_prefix_format % self.selector_state.itemData(
self.selector_state.currentIndex())
current_par = self.balancer_new.par_prefix_format % self.selector_par.itemData(self.selector_par.currentIndex())
confirmation = QMessageBox.question(self,
"Confirm action",
"Add selection to the following constituencies?\n" +
"Parliament:{}\nState:{}".format(current_par, current_state),
QMessageBox.Yes | QMessageBox.No)
if confirmation == QMessageBox.Yes:
self.layer.startEditing()
updates = [(current_par, current_state)]
for f in self.layer.selectedFeatures():
updates.append((f[self.par_new_fieldname], f[self.state_new_fieldname]))
self.balancer_new.update_topology(
{f.id(): {self.state_new_fieldname: current_state,
self.par_new_fieldname: current_par}})
# renumber POLLs in the changed
for entry in updates:
filter_expression = "'{}' = '{}' AND '{}' = '{}'" \
.format(self.par_new_fieldname,
entry[0],
self.state_new_fieldname,
entry[1])
req = QgsFeatureRequest(QgsExpression(filter_expression))
for i, f in enumerate(self.layer.getFeatures(req)):
self.balancer_new.update_topology(
{f.id(): {self.polling_new_fieldname: self.balancer_new.polling_prefix_format % (i + 1)}})
self.layer.commitChanges()
self.selection_clear()
self.statistics_update()
# self.balancer_new.load_topology()
# self.balancer_new.init_colouring()
self.layer_redraw(False)
self.iface.info("Selected features updated")
def selection_clear(self):
if self.layer is None:
return
self.layer.setSelectedFeatures([])
def select_layer(self):
startdir = os.path.join(self.inputDir.text(), Configuration().read("KML", "outputdir"))
filepath = QFileDialog.getOpenFileName(parent=self,
caption='Select shapefile',
filter="*.shp",
directory=startdir)
if filepath:
path, filename = os.path.split(filepath)
name, ext = os.path.splitext(filename)
layer = self.iface.addVectorLayer(filepath, name, "ogr")
if not layer.isValid():
self.iface.error("Layer failed to load!")
return
# QgsMapLayerRegistry.instance().addMapLayer(layer)
def select_input_dir(self):
startdir = os.path.dirname(self.inputDir.text())
directory = QFileDialog.getExistingDirectory(parent=self,
caption="Open Directory",
directory=startdir,
options=(
QFileDialog.ShowDirsOnly |
QFileDialog.DontResolveSymlinks))
if directory:
self.inputDir.setText(directory)
def generator_start(self):
# generate KML
if self.selector_target_state.currentIndex() == 0:
self.iface.warning("Please select state first")
return
src_dir = self.inputDir.text()
self.list_checks.clear()
self.messsage_handler(MessageType.Normal, "Validating requirements ...")
if not src_dir:
self.iface.error("Location of files not specified")
return
shapefiles = glob.glob1(src_dir, '*.shp')
if shapefiles.__len__() == 1:
self.messsage_handler(MessageType.OK,
"{} Shapefile found. Using {}".format(shapefiles.__len__(), shapefiles[0]))
else:
self.messsage_handler(MessageType.Fail, "Unexpected number of Shapefiles found. Only one " +
"shapefile is required. Aborting.")
return
csvfiles = glob.glob1(src_dir, '*.csv')
if csvfiles.__len__():
self.messsage_handler(MessageType.OK,
"{} CSV files(s) found. Using {}".format(csvfiles.__len__(), csvfiles[0]))
else:
self.messsage_handler(MessageType.Fail, "No CSV files found. Aborting.")
return
# save settings
Configuration().store_qt(Configuration.SRC_DIR, src_dir)
# check that CSV file contains all fields
if not self.validate_csv_file(src_dir, csvfiles[0]):
return
self.worker = Delimitation(self.selector_target_state.currentText(), src_dir)
wfiles = self.worker.get_working_files([LayerType.Polling, LayerType.State, LayerType.Parliament])
if not self.files_check_opened(wfiles):
self.messsage_handler(MessageType.Fail, "Operation cancelled")
return
# get duplicate values if any
match_feat_name = Configuration().read("CSV", "field")
layer = QgsVectorLayer(os.path.join(src_dir, shapefiles[0]), self.selector_target_state.currentText(), "ogr")
field_values = {}
for f in layer.getFeatures():
if f.fieldNameIndex(match_feat_name) == -1:
self.messsage_handler(MessageType.Fail,
"The field '{}' does not exist in Feature {}".format(match_feat_name, f.id()))
return
field_values.setdefault(f[match_feat_name], []).append(f.id())
duplicates = []
duplicate_ids = []
for k, v in field_values.iteritems():
if v.__len__() > 1:
duplicates.append(k)
duplicate_ids.extend(v)
if duplicates.__len__():
QgsMapLayerRegistry.instance().addMapLayer(layer)
layer.setSelectedFeatures(duplicate_ids)
self.messsage_handler(MessageType.Fail,
"Duplicate values found for {}. Aborting ...".format(", ".join(duplicates)))
return
self.messsage_handler(MessageType.OK, "All requirements validated. Starting ...")
self.btGenerate.setEnabled(False)
self.thread = QThread(self)
self.worker.moveToThread(self.thread)
self.worker.finished.connect(self.generator_end)
# self.worker.error.connect(self.generator_error)
self.worker.message.connect(self.messsage_handler)
try:
self.progressBar = QgisMessageBarProgress()
self.worker.progress.connect(self.progressBar.setPercentage)
self.thread.started.connect(self.worker.run_generate_shapefile_kml)
self.thread.start()
except Exception, e:
self.generator_error(e, traceback.format_exc())
def generator_error(self, e, exception_string):
self.messsage_handler(MessageType.Fail, exception_string)
QgsMessageLog.logMessage('DelimitationToolbox Exception:\n'.format(exception_string),
level=QgsMessageLog.CRITICAL)
def generator_end(self, ret):
# clean up the worker and thread
self.worker.deleteLater()
self.thread.quit()
self.thread.wait()
self.thread.deleteLater()
if not ret:
self.iface.info('Done!')
else:
self.messsage_handler(MessageType.Fail, ret)
if self.progressBar:
self.progressBar.close()
self.progressBar = None
self.btGenerate.setEnabled(True)
def files_check_opened(self, files):
opened = {}
for f in files:
for lyr in self.canvas.layers():
if lyr.type() != lyr.VectorLayer:
continue
lyr_path = lyr.dataProvider().dataSourceUri()
if lyr_path.find('|') != -1:
lyr_path, _ = lyr_path.split("|")
if f == os.path.normpath(lyr_path):
opened.update({lyr.id(): lyr_path})
if opened.__len__():
confirmation = QMessageBox.question(self,
"Files in use",
"Some files are currently opened in QGIS. Click YES to automatically close these files or NO to do it yourself",
QMessageBox.Yes | QMessageBox.No)
if confirmation == QMessageBox.No:
return False
# close these files
for k, v in opened.items():
QgsMapLayerRegistry().instance().removeMapLayer(k)
delete_shapefile(v)
return True
def topology_display(self):
selected_index = self.selector_topo_type.currentIndex()
if selected_index == 0:
balancer = self.balancer_old
else:
balancer = self.balancer_new
pars = sorted(balancer.map_par_state.items())
rows = []
for par in pars:
rows.append((par[0], par[1]['states'].keys().__len__(), par[1]['d'], par[1]['voters']))
for state in sorted(par[1]['states'].items()):
rows.append(("", state[0], state[1]))
# extra 2 for unused info rows and +1 for header row
self.table_topo.setRowCount(1)
self.table_topo.setRowCount(rows.__len__() - balancer.map_par_state.keys().__len__() + 2)
par_cell = None
row_count = 0
for row in rows:
if row[0]:
par_cell = QTableWidgetItem("{}\n{}\n{}".format(row[0], row[3], row[2])), row[1]
else:
if par_cell:
self.table_topo.setItem(row_count, 0, QTableWidgetItem(par_cell[0]))
self.table_topo.setSpan(row_count, 0, par_cell[1], 1)
par_cell = None
self.table_topo.setItem(row_count, 1, QTableWidgetItem(row[1]))
self.table_topo.setItem(row_count, 2, QTableWidgetItem(row[2]))
row_count += 1
unused_header = QTableWidgetItem("Unused codes")
unused_header.setTextAlignment(Qt.AlignHCenter | Qt.AlignVCenter)
self.table_topo.setItem(row_count, 0, unused_header)
self.table_topo.setSpan(row_count, 0, 1, 3)
row_count += 1
unused_totals = balancer.get_unused()
if unused_totals[0].__len__() == 0:
par_cell = QTableWidgetItem('')
else:
par_cell = QTableWidgetItem(", ".join(unused_totals[0]))
self.table_topo.setItem(row_count, 0, par_cell)
state_cell = QTableWidgetItem(", ".join(unused_totals[1]))
self.table_topo.setItem(row_count, 1, state_cell)
self.table_topo.setItem(row_count, 2, QTableWidgetItem(''))
self.iface.info("Allocation table refreshed")
def validate_csv_file(self, cdir, cfile):
with open(os.path.join(cdir, cfile), 'rb') as csvfile:
rows = csv.reader(csvfile, delimiter=',', quoting=csv.QUOTE_NONE)
csv_columns = rows.next()
# configuration requirements
conf_columns = set()
conf_columns.update(Configuration().read("CSV", "columns"))
conf_columns.update(Configuration().read("Polling", "name_columns"))
conf_columns.update(Configuration().read("Polling", "attributes"))
conf_columns.update(Configuration().read("State", "name_columns"))
conf_columns.update(Configuration().read("State", "attributes"))
conf_columns.update(Configuration().read("Parliament", "name_columns"))
conf_columns.update(Configuration().read("Parliament", "attributes"))
# check name not more than 10 characters
toolongs = []
for col in conf_columns:
if col.__len__() > 10:
toolongs.append(col)
if toolongs.__len__():
self.messsage_handler(MessageType.Fail,
"The name of column(s) {} is too long (max 10 characters). Aborting.".format(
", ".join(toolongs),
cfile))
return False
diff = conf_columns.difference(csv_columns)
if diff.__len__():
self.messsage_handler(MessageType.Fail, "Column(s) {} missing from {}. Aborting."
.format(", ".join(diff), cfile))
return False
return True
def balancer_start(self):
if self.balancer_started:
self.balancer_stop()
else:
if self.rb_manual.isChecked():
self.balancer_manual_start()
elif self.rb_automated.isChecked():
self.analyse()
else:
self.iface.info("Feature not yet implemented")
def balancer_generate_start(self):
if not self.balancer_new.is_balanced():
self.iface.error("Map not balanced. Unable to generate KML.")
return
if self.selector_target_state.currentIndex() == 0:
self.iface.warning("Please select a target state first")
return
filepath, layerid = self.layer.dataProvider().dataSourceUri().split("|")
path, filename = os.path.split(filepath)
self.worker = Delimitation(self.selector_target_state.currentText(), path, path)
# set the temp layer as currently loaded layer
self.worker.master_layer = self.layer
self.worker.map_layers.setdefault(LayerType.Polling, []).append(self.layer)
# check for open files
wfiles = self.worker.get_working_files([LayerType.State, LayerType.Parliament])
if not self.files_check_opened(wfiles):
self.iface.warning("Operation aborted")
return
self.thread = QThread(self)
self.worker.moveToThread(self.thread)
self.worker.finished.connect(self.generator_end)
# self.worker.error.connect(self.generator_error)
self.worker.message.connect(self.messsage_handler)
try:
self.progressBar = QgisMessageBarProgress()
self.worker.progress.connect(self.progressBar.setPercentage)
self.thread.started.connect(self.worker.run_generate_kml)
self.thread.start()
except Exception, e:
self.generator_error(e, traceback.format_exc())
def get_balancer(self):
if self.selector_map_type.currentIndex() == 0:
return self.balancer_old
return self.balancer_new
def get_delta(self):
delta = parse_float(self.tbDelta.text())
if not delta or delta > 1 or delta < 0:
self.iface.info("Please specify a value between 0 and 1")
return delta
def balancer_manual_start(self):
if not self.layer:
return
self.voters_fieldname = self.selector_voters.itemData(self.selector_voters.currentIndex())
self.polling_old_fieldname = self.selector_polling_old.itemData(self.selector_polling_old.currentIndex())
self.state_old_fieldname = self.selector_state_old.itemData(self.selector_state_old.currentIndex())
self.par_old_fieldname = self.selector_par_old.itemData(self.selector_par_old.currentIndex())
self.state_new_fieldname = self.selector_state_new.itemData(self.selector_state_new.currentIndex())
self.par_new_fieldname = self.selector_par_new.itemData(self.selector_par_new.currentIndex())
self.polling_new_fieldname = self.selector_polling_new.itemData(self.selector_polling_new.currentIndex())
self.par_new_prefix = self.selector_target_state.itemData(self.selector_target_state.currentIndex())
delta = self.get_delta()
if (not self.voters_fieldname or
not self.polling_old_fieldname or
not self.state_old_fieldname or
not self.par_old_fieldname or
not self.state_new_fieldname or
not self.par_new_fieldname or
not self.polling_new_fieldname or
not self.par_new_prefix or
not delta):